/* ===== RESET & ROOT ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html { height:100%; }

:root {
  --bg:      #050a0f;
  --panel:   #0a1520;
  --border:  #0f3a5a;
  --accent:  #00d4ff;
  --accent2: #00ff88;
  --warn:    #ff9f4a;
  --danger:  #ff2244;
  --text:    #a0cce0;
  --bright:  #e0f4ff;
  --grid:    rgba(0,212,255,0.04);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
  --tab-h:   66px;
  --header-h:72px;
  --ui-font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
}

/* ===== LIGHT MODE ===== */
:root.light {
  --bg:     #eef2f6;
  --panel:  #ffffff;
  --border: #c0ccd8;
  --accent: #0077bb;
  --accent2:#007a45;
  --warn:   #d04e10;
  --danger: #cc2244;
  --text:   #283b4a;
  --bright: #0d1f2d;
  --grid:   rgba(0,0,0,0.04);
}

:root.light .tab-bar,
:root.light .library-sheet,
:root.light .scan-wrap,
:root.light .specimen-wrap,
:root.light .tooltip-box,
:root.light .metric-card,
:root.light .log-area,
:root.light .report-area,
:root.light .axis-btn,
:root.light .sizing-row,
:root.light .defect-section,
:root.light .defect-mode-btn,
:root.light .user-admin-row,
:root.light .defect-location-summary > div,
:root.light .defect-preview,
:root.light .defect-clear,
:root.light .defect-card,
:root.light .challenge-result,
:root.light .challenge-score-card,
:root.light .challenge-score-total,
:root.light .arena-mode-card,
:root.light .arena-duel-scoreboard span,
:root.light .arena-challenge-card,
:root.light .arena-rank-row,
:root.light .arena-score-matrix,
:root.light .arena-draft-status span,
:root.light .arena-empty,
:root.light .arena-score-table thead th,
:root.light .instructor-metric-card,
:root.light .instructor-module-card,
:root.light .instructor-tab,
:root.light .instructor-student-option,
:root.light .instructor-feature-list span,
:root.light .instructor-author-block,
:root.light .instructor-results-toolbar,
:root.light .instructor-result-summary span,
:root.light .instructor-results-table th,
:root.light .arena-quick-stats span,
:root.light .arena-flow-step,
:root.light .arena-author-locked-note,
:root.light .piece-summary-grid span,
:root.light .weld-card,
:root.light .weld-detail-canvas,
:root.light .info-row,
:root.light .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-tabs,
:root.light .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-two-col > div {
  background: #ffffff;
}

:root.light select,
:root.light .weld-defect-select,
:root.light .arena-duel-panel .auth-field select,
:root.light .instructor-panel input,
:root.light .instructor-panel select,
:root.light .instructor-panel textarea,
:root.light .instructor-join-row input {
  background-color: #ffffff;
  color: var(--bright);
}

:root.light #canvasAScan,
:root.light #challengeCanvasAScan {
  background: #ffffff;
}

:root.light .library-sheet-handle {
  background: rgba(13,31,45,0.22);
}

:root.light #ascanCursorTag,
:root.light .ascan-cursor-tag,
:root.light .defect-drag-hint {
  background: rgba(255,255,255,0.94);
}

:root.light .challenge-result-final,
:root.light .arena-mode-card.active {
  background: linear-gradient(180deg, rgba(0,122,69,0.10), #ffffff);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--ui-font);
  height: 100%;
  overflow: hidden;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  touch-action: manipulation;
}

/* ===== ACCESSIBLE FOCUS INDICATOR ===== */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  box-shadow: 0 0 8px var(--accent);
}

/* ===== HEADER ===== */
.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: calc(var(--header-h) + var(--safe-top));
  padding-top: var(--safe-top);
  background: #ffffff;
  border-bottom: 1px solid #d0dae6;
  box-shadow: 0 2px 8px rgba(27,95,187,0.08);
  display: flex; align-items: center; justify-content: space-between;
  padding-left: 16px; padding-right: 16px;
  z-index: 100;
}
.app-header::after {
  content:'';
  position:absolute; bottom:-1px; left:0; right:0; height:2px;
  background: linear-gradient(90deg, transparent, #1B5FBB 30%, #2E3F54 70%, transparent);
  opacity:.35;
}

/* Logo imagem no header */
.logo-row {
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}
.header-logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  display: block;
  min-width: 0;
}

.app-version {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ui-font);
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
}
.header-app-version {
  flex: 0 0 auto;
  padding: 3px 8px;
  border: 1px solid #d0dae6;
  border-radius: 999px;
  background: #f4f7fb;
  color: #1B5FBB;
  font-size: 12px;
  line-height: 1.2;
}

.hdr-status { display:flex; align-items:center; gap:8px; }
.hdr-status-right { text-align:right; }
.hdr-mode { font-size: 12px; color:#1B5FBB; letter-spacing:1.2px; font-family:var(--ui-font); font-weight:700; }

/* ── Theme toggle button ── */
.theme-btn {
  background: transparent;
  border: 1px solid #d0dae6;
  color: #6b7f96;
  border-radius: 50%;
  width: 30px; height: 30px;
  font-size: 15px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s, color .2s;
  flex-shrink: 0;
}
.theme-btn:hover { border-color: #1B5FBB; color: #1B5FBB; }

.user-rank-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 4px 10px;
  border: 1px solid #c5d5f0;
  border-radius: 999px;
  background: #f0f5ff;
  color: #2E3F54;
  font-family: var(--ui-font);
  white-space: nowrap;
  flex-shrink: 0;
}
.user-rank-pill span {
  color: #6b7f96;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
}
.user-rank-pill strong {
  color: #1B5FBB;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .5px;
}

/* Light mode — header mantém branco */
:root.light .app-header { background: #ffffff; }

.hdr-status-pill {
  font-size: 12px; font-family:var(--ui-font);
  background: rgba(27,160,80,0.1);
  border:1px solid rgba(27,160,80,0.35);
  color: #1a8045;
  border-radius:20px;
  padding:2px 10px;
  margin-top:2px;
  display:inline-block;
  font-weight: 700;
}
.hdr-status-pill.warn { background:rgba(200,80,20,.1); border-color:rgba(200,80,20,.35); color:#c05010; }
.hdr-status-pill.scan { animation: scanpulse 1s ease-in-out infinite; }
@keyframes scanpulse { 0%,100%{opacity:1} 50%{opacity:.5} }

/* ===== SCROLLABLE CONTENT AREA ===== */
.content-area {
  position: fixed;
  top: calc(var(--header-h) + var(--safe-top));
  bottom: calc(var(--tab-h) + var(--safe-bot));
  left: 0; right: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

/* ===== TAB PAGES ===== */
.tab-page { display:none; padding:12px 12px 8px; }
.tab-page.active { display:block; }

/* ===== BOTTOM TAB BAR ===== */
.tab-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: calc(var(--tab-h) + var(--safe-bot));
  padding-bottom: var(--safe-bot);
  background: rgba(5,10,15,0.97);
  border-top: 1px solid var(--border);
  display: flex;
  z-index: 100;
  backdrop-filter: blur(8px);
}
.tab-btn {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 3px;
  background: none; border: none;
  color: var(--text);
  font-size: 12px; letter-spacing: 1px;
  font-family: var(--ui-font);
  cursor: pointer;
  padding: 6px 4px;
  transition: color .2s;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}
.tab-btn.active { color: var(--accent); }
.tab-btn.active::after {
  content:'';
  position:absolute; top:0; left:20%; right:20%; height:2px;
  background:var(--accent);
  box-shadow:0 0 6px var(--accent);
  border-radius:0 0 2px 2px;
}
.tab-btn.has-notice::before {
  content:'';
  position:absolute;
  top:7px;
  right:18%;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--warn);
  box-shadow:0 0 8px rgba(255,159,74,0.85);
}
.tab-icon { font-size:18px; line-height:1; }
.tab-icon.transducer-icon {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
}
.tab-icon.transducer-icon svg {
  width: 24px;
  height: 24px;
  display: block;
  overflow: visible;
}
.transducer-icon path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.transducer-icon .transducer-handle,
.transducer-icon .transducer-face {
  fill: currentColor;
  stroke: none;
}
.transducer-icon .transducer-core {
  fill: var(--bg);
  opacity: .65;
  stroke: none;
}
.transducer-icon .transducer-cable,
.transducer-icon .transducer-beam {
  stroke-width: 1.8;
  opacity: .75;
}
.tab-icon.library-icon {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
}
.tab-icon.library-icon svg {
  width: 24px;
  height: 24px;
  display: block;
  overflow: visible;
}
.library-icon path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.library-icon .library-cube-left,
.library-icon .library-cube-right,
.library-icon .library-cube-top {
  fill: #9aa3ad;
  stroke: #6f7882;
  opacity: .88;
}
.library-icon .library-cube-top {
  fill: #b6bec7;
}
.library-icon .library-cube-left {
  fill: #8f98a3;
}
.library-icon .library-cube-right {
  fill: #747e89;
}
.library-icon .library-cube-ridge {
  stroke: #5d6670;
  opacity: .95;
  stroke-width: 1.45;
}
.library-icon .library-crack {
  fill: none;
  stroke: currentColor;
  opacity: 1;
  stroke-width: 2.4;
}
.library-icon .library-crack-branch {
  opacity: 1;
  stroke-width: 2;
}
.tab-icon.academy-icon {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
}
.tab-icon.academy-icon svg {
  width: 24px;
  height: 24px;
  display: block;
  overflow: visible;
}
.academy-icon path,
.academy-class-icon path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.academy-icon .academy-cap-top {
  fill: #b6bec7;
  stroke-width: 1.6;
}
.academy-icon .academy-cap-band {
  fill: #747e89;
  stroke-width: 1.6;
}
.academy-icon .academy-cap-button,
.academy-icon .academy-tassel {
  stroke-width: 1.8;
}
.academy-class-icon {
  width: 34px;
  height: 28px;
  display: inline-grid;
  place-items: center;
}
.academy-class-icon svg {
  width: 34px;
  height: 28px;
  display: block;
  overflow: visible;
}
.academy-class-icon .academy-board {
  fill: rgba(38, 185, 129, .18);
  stroke-width: 1.7;
}
.academy-class-icon .academy-board-leg,
.academy-class-icon .academy-teacher-head,
.academy-class-icon .academy-teacher-body,
.academy-class-icon .academy-teacher-arm {
  stroke-width: 1.7;
}

.library-sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.48);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease;
  z-index: 115;
}
.library-sheet {
  position: fixed;
  left: 50%;
  right: auto;
  bottom: 0;
  width: min(100% - 18px, 520px);
  max-width: 520px;
  transform: translate(-50%, 110%);
  padding: 10px 14px calc(16px + var(--safe-bot));
  padding-bottom: calc(16px + var(--safe-bot));
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 18px 18px 0 0;
  background: rgba(8,16,23,0.98);
  box-shadow: 0 -18px 45px rgba(0,0,0,0.5);
  transition: transform .22s ease;
  z-index: 120;
}
body.library-sheet-open .library-sheet-overlay {
  opacity: 1;
  pointer-events: auto;
}
body.library-sheet-open .library-sheet {
  transform: translate(-50%, 0);
}
body.academy-sheet-open #academySheetOverlay {
  opacity: 1;
  pointer-events: auto;
}
body.academy-sheet-open #academySheet {
  transform: translate(-50%, 0);
}
.library-sheet-handle {
  width: 42px;
  height: 4px;
  border-radius: 999px;
  background: rgba(255,255,255,0.26);
  margin: 0 auto 12px;
}
.library-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.library-sheet-head h2 {
  margin: 0;
  font-family: var(--ui-font);
  font-size: 13px;
  letter-spacing: 1.4px;
  color: var(--accent);
}
.library-sheet-close {
  min-width: 36px;
  min-height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-size: 22px;
  line-height: 1;
}
.library-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.library-card {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  padding: 14px 10px;
  text-align: left;
  font-family: var(--ui-font);
  display: grid;
  gap: 6px;
  cursor: pointer;
}
.library-card:hover,
.library-card:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}
.library-card-icon {
  font-size: 24px;
  line-height: 1;
}
.library-card-title {
  font-size: 12px;
  letter-spacing: .8px;
  font-weight: 700;
}
.library-card-copy {
  font-size: 10px;
  line-height: 1.35;
  color: var(--text);
  opacity: .78;
  font-family: system-ui, sans-serif;
}
.library-card.locked,
.library-card:disabled {
  opacity:.62;
  cursor:not-allowed;
}
.library-card.locked:hover,
.library-card.locked:focus-visible,
.library-card:disabled:hover,
.library-card:disabled:focus-visible {
  border-color:var(--border);
  color:var(--text);
}

/* ===== PANELS ===== */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius:6px;
  padding:14px;
  margin-bottom:12px;
  position:relative;
}
.panel::before {
  content:'';
  position:absolute;
  top:0;left:0;right:0;height:2px;
  border-radius:6px 6px 0 0;
  background:linear-gradient(90deg, var(--accent), transparent);
}
.panel-title {
  font-family:monospace;
  font-size: 12px;
  letter-spacing:3px;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:12px;
  padding-bottom:8px;
  border-bottom:1px solid var(--border);
}

/* ===== CONTROLS ===== */
.ctrl-group { margin-bottom:14px; }
.ctrl-label {
  font-size: 12px; letter-spacing:1px;
  color:var(--text); margin-bottom:6px;
  font-family: var(--ui-font);
  font-weight:600; text-transform:uppercase; display:block;
}

.mobile-only { display: none !important; }
.mobile-advanced-tools {
  margin-top: 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: rgba(0,212,255,.035);
}
.mobile-advanced-tools > summary {
  display: flex;
  min-height: 34px;
  align-items: center;
  padding: 7px 10px;
  color: var(--accent);
  cursor: pointer;
  font: 800 12px/1.2 var(--ui-font);
  letter-spacing: .7px;
  text-transform: uppercase;
}
.mobile-advanced-tools-body {
  display: grid;
  gap: 8px;
  padding: 0 10px 10px;
}
.scan-tool-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.scan-tool-row-wrap { flex-wrap: wrap; }
.scan-tool-row > span,
.dac-points-list {
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  letter-spacing: 1px;
}
.scan-tool-row input[type="range"] { flex: 1; min-width: 90px; }
.dac-points-list { min-height: 14px; }
.slider-row { display:flex; align-items:center; gap:8px; }
input[type=range] {
  flex:1;
  -webkit-appearance:none;
  height:6px;
  background:var(--border);
  border-radius:3px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance:none;
  width:22px; height:22px;
  background:var(--accent);
  border-radius:50%;
  box-shadow:0 0 10px var(--accent);
}
.slider-val {
  font-family:var(--ui-font);
  font-size:12px;
  color:var(--bright);
  min-width:60px;
  text-align:right;
}

select {
  width:100%;
  background:rgba(0,0,0,0.5);
  border:1px solid var(--border);
  color:var(--bright);
  padding:10px 12px;
  font-family:var(--ui-font);
  font-size:13px;
  border-radius:4px;
  -webkit-appearance:none;
  appearance:none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2300d4ff' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position: right 12px center;
  padding-right:36px;
}

/* ===== BUTTONS ===== */
.btn {
  width:100%;
  padding:14px;
  font-weight:700;
  font-size:14px;
  letter-spacing:3px;
  text-transform:uppercase;
  border:none;
  border-radius:5px;
  cursor:pointer;
  transition:all .2s;
  margin-bottom:8px;
  min-height:48px;
}
.btn-primary {
  background:linear-gradient(135deg,#005580,#0099cc);
  color:var(--bright);
  border:1px solid var(--accent);
  box-shadow:0 0 16px rgba(0,212,255,0.2);
}
.btn-primary.active {
  background:linear-gradient(135deg,#003344,#005566);
  color:var(--accent2);
  border-color:var(--accent2);
  animation:scanning 1s ease-in-out infinite;
}
@keyframes scanning { 0%,100%{box-shadow:0 0 12px rgba(0,255,136,.3)} 50%{box-shadow:0 0 28px rgba(0,255,136,.8)} }
.btn-secondary {
  background:transparent;
  color:var(--warn);
  border:1px solid var(--warn);
}
.btn-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; }

/* ===== DEFECT BUILDER ===== */
.defects-panel {
  display:grid;
  gap:12px;
}
.defect-section {
  border:1px solid rgba(0,212,255,0.16);
  background:rgba(0,0,0,0.16);
  border-radius:6px;
  padding:12px;
}
.defect-section-head {
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:12px;
}
.defect-section-head > span {
  width:26px;
  height:26px;
  flex:0 0 26px;
  display:grid;
  place-items:center;
  border:1px solid var(--border);
  border-radius:50%;
  color:var(--accent);
  font-family:monospace;
  font-weight:800;
  background:rgba(0,212,255,0.08);
}
.defect-section-head strong {
  display:block;
  color:var(--bright);
  font-size:13px;
  letter-spacing:1px;
  text-transform:uppercase;
}
.defect-section-head small {
  display:block;
  margin-top:2px;
  color:var(--text);
  font-size: 12px;
  line-height:1.25;
}
.defect-mode-toggle {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px;
  margin-bottom:12px;
}
.defect-mode-btn {
  min-height:38px;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.22);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  font-weight:800;
  letter-spacing:1px;
  text-transform:uppercase;
  cursor:pointer;
}
.defect-mode-btn.active {
  color:var(--accent2);
  border-color:rgba(0,255,136,0.55);
  background:rgba(0,255,136,0.08);
}
.weld-defect-box,
.manual-defect-box,
.crack-orientation-box {
  margin:0;
  padding:10px;
  background:rgba(255,160,0,0.06);
  border:1px solid rgba(255,160,0,0.22);
  border-radius:5px;
}
.crack-orientation-box[hidden] {
  display:none !important;
}
.weld-defect-select {
  width:100%;
  min-width:0;
  min-height:42px;
  background:#020810;
  color:var(--bright);
  border:1px solid rgba(255,160,0,0.35);
  border-radius:5px;
  padding:0 10px;
  font-size:12px;
  font-weight:600;
}
.defect-help {
  margin-top:8px;
  color:var(--warn);
  font-family:monospace;
  font-size: 12px;
  line-height:1.35;
}
.defect-slider-val {
  min-width:112px;
}
#defectLocationSection.is-auto input[type=range] {
  opacity:.45;
}
.defect-location-summary {
  display:grid;
  grid-template-columns:1fr 1.45fr;
  gap:8px;
  margin-bottom:10px;
}
.defect-location-summary > div {
  min-height:48px;
  padding:8px 10px;
  border:1px solid rgba(0,212,255,0.18);
  border-radius:5px;
  background:rgba(0,0,0,0.22);
}
.defect-location-summary small {
  display:block;
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  letter-spacing:1px;
  text-transform:uppercase;
}
.defect-location-summary strong {
  display:block;
  margin-top:4px;
  color:var(--bright);
  font-family:monospace;
  font-size:13px;
}
.defect-preview {
  position:relative;
  height:96px;
  border:1px solid var(--border);
  border-radius:5px;
  overflow:hidden;
  background:
    linear-gradient(180deg, rgba(160,204,224,0.14), rgba(160,204,224,0.05)),
    #06111a;
}
.defect-preview-grid {
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.08) 1px, transparent 1px);
  background-size:20% 25%;
}
.defect-preview-weld {
  position:absolute;
  top:0;
  bottom:0;
  left:44%;
  width:12%;
  display:none;
  background:linear-gradient(180deg, rgba(255,160,0,0.28), rgba(255,160,0,0.05));
  border-left:1px dashed rgba(255,160,0,0.55);
  border-right:1px dashed rgba(255,160,0,0.55);
}
.defect-preview.has-weld .defect-preview-weld {
  display:block;
}
.defect-preview-marker {
  position:absolute;
  left:50%;
  top:40%;
  width:16px;
  height:16px;
  margin:-8px 0 0 -8px;
  border:2px solid var(--bright);
  border-radius:50%;
  background:var(--danger);
  box-shadow:0 0 14px rgba(255,34,68,0.65);
}
.defect-preview-marker.is-crack {
  width:34px;
  height:3px;
  margin:-1.5px 0 0 -17px;
  border:0;
  border-radius:2px;
  transform:rotate(var(--crack-angle, 90deg));
}
.defect-preview-marker.is-auto {
  background:var(--warn);
  box-shadow:0 0 14px rgba(255,160,0,0.65);
}
.defect-actions {
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:8px;
  margin-top:12px;
}
.defect-btn {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:0 14px;
  border:1px solid rgba(255,34,68,0.3);
  border-radius:5px;
  color:var(--danger);
  font-size:12px;
  font-weight:700;
  cursor:pointer;
  margin:0;
  min-height:42px;
  letter-spacing:.8px;
  text-align:center;
  text-transform:uppercase;
}
.defect-btn::before { content:'+'; font-family:monospace; font-size:13px; }
.weld-defect-add {
  color:var(--warn);
  border-color:rgba(255,160,0,0.45);
  background:rgba(255,160,0,0.08);
}
.defect-clear {
  color:var(--text);
  border-color:var(--border);
  background:rgba(0,0,0,0.2);
}
.defect-clear::before { content:'x'; }
.defect-list {
  display:grid;
  gap:8px;
  color:var(--text);
  min-height:42px;
}
.defect-empty {
  display:grid;
  place-items:center;
  min-height:42px;
  border:1px dashed rgba(160,204,224,0.25);
  border-radius:5px;
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
}
.defect-card {
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:10px;
  align-items:center;
  padding:9px 10px;
  background:rgba(0,0,0,0.28);
  border:1px solid rgba(160,204,224,0.16);
  border-left:3px solid var(--defect-color, var(--danger));
  border-radius:5px;
}
.defect-card-name {
  color:var(--bright);
  font-size:12px;
  font-weight:700;
}
.defect-card-meta {
  margin-top:3px;
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
}
.defect-remove-btn {
  min-width:36px;
  min-height:36px;
  border:1px solid rgba(255,34,68,0.45);
  border-radius:5px;
  background:rgba(255,34,68,0.08);
  color:var(--danger);
  font-family:monospace;
  font-size:16px;
  cursor:pointer;
}

/* ===== SCAN DISPLAY ===== */
.scan-wrap {
  background:#020810;
  border:1px solid var(--border);
  border-radius:5px;
  padding:10px;
  margin-bottom:12px;
  position: relative;
}
#canvasAScan,
#challengeCanvasAScan {
  height: 170px;
  background:#010d03;
  cursor: crosshair;
}
.scan-hdr {
  font-family:monospace; font-size: 12px;
  color:var(--accent); letter-spacing:2px;
  margin-bottom:6px;
  display:flex; justify-content:space-between; align-items:center;
  flex-wrap: wrap; gap: 4px;
}
.rec-dot { color:var(--danger); animation:blink 1s infinite; }
canvas { display:block; width:100%; border-radius:2px; }


/* ── Tooltips ────────────────────────────────── */
.tip-btn {
  display:inline-flex; align-items:center; justify-content:center;
  width:20px; height:20px; border-radius:50%;
  background:rgba(0,212,255,0.12); border:1px solid rgba(0,212,255,0.3);
  color:var(--accent); font-size: 12px; font-weight:700; cursor:pointer;
  margin-left:5px; flex-shrink:0; line-height:1;
  position: relative;
}
.tip-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
}
.tip-btn:active { background:rgba(0,212,255,0.3); }
.tooltip-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,0.75);
  z-index:200; display:flex; align-items:center; justify-content:center;
  padding:20px;
}
.tooltip-box {
  background:#0d1f15; border:1px solid var(--accent2);
  border-radius:8px; padding:16px; max-width:340px; width:100%;
  box-shadow: 0 0 30px rgba(0,255,136,0.15);
}
.tooltip-box h3 {
  font-family:monospace; font-size:13px; color:var(--accent2);
  margin:0 0 10px 0; letter-spacing:1px;
}
.tooltip-box p {
  font-family:monospace; font-size: 12px; color:#ccc;
  line-height:1.7; margin:0 0 8px 0;
}
.tooltip-box .tip-formula {
  background:rgba(0,0,0,0.4); border-left:2px solid var(--accent);
  padding:6px 10px; font-family:monospace; font-size: 12px;
  color:var(--accent); margin:8px 0; border-radius:0 4px 4px 0;
}
.tooltip-box .tip-close {
  width:100%; margin-top:10px;
}

/* Quick-gain buttons */
.gain-btns {
  display: flex; gap: 6px; align-items: center;
}
.gain-btn {
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.35);
  color: var(--accent);
  font-family: var(--ui-font); font-size: 12px; font-weight: 700;
  padding: 8px 12px; border-radius: 3px; cursor: pointer;
  min-height: 36px; line-height: 1;
}
.gain-btn:active { background: rgba(0,212,255,0.25); }

.ascan-scale-row {
  display: grid;
  grid-template-columns: auto minmax(90px, 1fr) 78px;
  gap: 8px;
  align-items: center;
  margin-top: 6px;
}
.ascan-scale-row span,
.ascan-scale-row strong {
  font-family: var(--ui-font);
  font-size: 12px;
  color: var(--text);
  letter-spacing: 1px;
  white-space: nowrap;
}
.ascan-scale-row strong {
  color: var(--accent2);
  text-align: right;
}
.ascan-scale-row input[type=range] {
  height: 4px;
}

/* Axis scale toggle buttons */
.axis-btn {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--ui-font); font-size: 12px; font-weight: 600;
  padding: 6px 12px; border-radius: 3px; cursor: pointer;
  min-height: 32px; line-height: 1.15; transition: all .15s;
  letter-spacing: 0.5px;
}
.axis-btn.active {
  background: rgba(0,255,136,0.15);
  border-color: var(--accent2);
  color: var(--accent2);
  box-shadow: 0 0 8px rgba(0,255,136,0.25);
}
.axis-btn:disabled {
  opacity: .45;
  cursor: not-allowed;
  box-shadow: none;
}

/* A-Scan cursor readout overlay */
#ascanCursorTag,
.ascan-cursor-tag {
  position: absolute;
  display: none;
  background: rgba(0,0,0,0.82);
  border: 1px solid var(--accent2);
  border-radius: 3px;
  padding: 3px 8px;
  font-family: var(--ui-font); font-size: 12px;
  color: var(--accent2);
  pointer-events: none;
  z-index: 10;
  white-space: nowrap;
}

/* dB sizing panel */
.sizing-row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  padding: 8px 12px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: 4px; margin-bottom: 5px;
  font-family: var(--ui-font); font-size: 14px;
}
.sizing-row .s-lbl { color: var(--text); overflow-wrap: anywhere; }
.sizing-row .s-val { color: var(--accent2); font-size: 16px; font-weight: 700; white-space: nowrap; }
.sizing-row .s-val.danger { color: var(--danger); }

/* ===== USER ADMIN ===== */
.user-admin-panel {
  min-height: 240px;
}
.user-admin-head,
.user-admin-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, 190px);
  gap: 10px;
  align-items: center;
}
.user-admin-head {
  margin-bottom: 8px;
  padding: 0 10px;
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
}
.user-admin-list {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}
.user-admin-row {
  min-height: 52px;
  padding: 8px 10px;
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--border);
  border-radius: 5px;
}
.user-admin-name {
  min-width: 0;
  color: var(--bright);
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.user-admin-select {
  min-height: 38px;
}
.user-admin-empty {
  padding: 16px 10px;
  border: 1px dashed var(--border);
  border-radius: 5px;
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  text-align: center;
}
.user-admin-refresh {
  margin-bottom: 0;
}

@media (max-width: 560px) {
  .user-admin-head { display: none; }
  .user-admin-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  .user-admin-name { white-space: normal; }
}

/* ===== SPECIMEN ===== */
.specimen-wrap {
  height:170px;
  background: #1a1a1a;
  border:1px solid #444;
  border-radius:4px;
  overflow:hidden;
  cursor:crosshair;
  touch-action:none;
  margin-bottom:8px;
  position: relative;
}
#specimenCanvas { display:block; width:100%; height:100%; cursor: grab; }
#specimenCanvas:active { cursor: grabbing; }
#specimenCanvas.is-defect-hover { cursor: move; }
#specimenCanvas.is-defect-dragging { cursor: grabbing; }
.defect-drag-hint {
  position:absolute;
  left:50%;
  bottom:7px;
  z-index:3;
  max-width:calc(100% - 20px);
  transform:translateX(-50%);
  padding:4px 8px;
  border:1px solid rgba(0,212,255,0.42);
  border-radius:999px;
  background:rgba(4,12,18,0.82);
  color:#9beaff;
  font-family:monospace;
  font-size:9px;
  line-height:1.2;
  text-align:center;
  white-space:nowrap;
  pointer-events:none;
}
.defect-drag-hint[hidden] { display:none; }
.draw-grid[hidden],
.draw-toolbar[hidden],
.draw-guide[hidden],
.draw-notice[hidden] {
  display:none !important;
}
.draw-grid {
  top:0;
  left:0;
  right:auto;
  bottom:auto;
  width:100%;
  height:100%;
  display:block;
  background-image:
    linear-gradient(rgba(0,212,255,0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.18) 1px, transparent 1px);
  background-size:var(--draw-cell-w, 14px) var(--draw-cell-h, 14px);
  background-position:left top;
}
.draw-node {
  position:absolute;
  width:18px;
  height:18px;
  min-width:18px;
  min-height:18px;
  padding:0;
  border:1px solid transparent;
  border-radius:50%;
  background:transparent;
  transform:translate(-50%, -50%);
  cursor:crosshair;
}
.draw-node::after {
  content:'';
  position:absolute;
  inset:6px;
  border-radius:50%;
  background:rgba(0,212,255,0.35);
  box-shadow:0 0 4px rgba(0,212,255,0.35);
  opacity:0;
  transition:opacity .12s, background .12s, box-shadow .12s;
}
.draw-node:hover::after,
.draw-node:focus-visible::after {
  opacity:1;
}
.draw-node.selected::after {
  opacity:1;
  background:var(--accent2);
  box-shadow:0 0 8px rgba(0,255,136,0.8);
}
.draw-node.is-first {
  border-color:rgba(0,255,136,0.55);
}
.draw-toolbar {
  display:grid;
  grid-template-columns:minmax(0, 1fr) auto auto auto;
  gap:6px;
  align-items:center;
  margin-top:6px;
}
.draw-guide {
  display:grid;
  gap:4px;
  margin:8px 0 6px;
  padding:9px 10px;
  border:1px solid rgba(0,212,255,0.35);
  border-radius:5px;
  background:rgba(0,212,255,0.08);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  line-height:1.5;
}
.draw-guide strong {
  color:var(--accent);
  letter-spacing:1px;
  text-transform:uppercase;
}
.draw-notice {
  margin-top:7px;
  padding:8px 10px;
  border:1px solid rgba(0,255,136,0.35);
  border-radius:5px;
  background:rgba(0,255,136,0.08);
  color:var(--accent2);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:.6px;
  line-height:1.45;
  text-transform:uppercase;
}
.draw-notice.warn {
  color:var(--warn);
  border-color:rgba(255,159,74,0.35);
  background:rgba(255,159,74,0.08);
}
.draw-status {
  min-width:0;
  color:var(--accent2);
  font-family:monospace;
  font-size: 12px;
  letter-spacing:1px;
  text-transform:uppercase;
}
.draw-toolbar .axis-btn {
  min-height:32px;
  padding:7px 9px;
  margin:0;
}
.draw-finish-btn {
  color:var(--accent2) !important;
  border-color:var(--accent2) !important;
}
.draw-piece-main-btn {
  margin:0;
}

@media (max-width: 520px) {
  .draw-toolbar {
    grid-template-columns:1fr 1fr 1fr;
  }
  .draw-status {
    grid-column:1 / -1;
  }
}


/* ===== CHALLENGE ===== */
.challenge-status {
  color:var(--warn);
  border:1px solid rgba(255,160,0,0.35);
  border-radius:3px;
  padding:3px 8px;
  background:rgba(255,160,0,0.08);
}
.challenge-arena-context {
  margin: -2px 0 10px;
  padding: 8px 10px;
  border: 1px solid rgba(0,255,136,0.35);
  border-radius: 5px;
  background: rgba(0,255,136,0.08);
  color: var(--accent2);
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.challenge-arena-context[hidden] { display:none !important; }
.challenge-specimen-shell { position:relative; }
.challenge-specimen-wrap { margin-bottom:10px; }
#challengeSpecimenCanvas { display:block; width:100%; height:100%; cursor:grab; }
#challengeSpecimenCanvas:active { cursor:grabbing; }
.challenge-grid {
  position:absolute;
  inset:0;
  display:grid;
  pointer-events:auto;
  z-index:5;
}
.challenge-grid.draw-grid {
  display:block;
  inset:0;
  width:100%;
  height:100%;
}
.challenge-cell {
  min-width:0;
  min-height:0;
  border:1px solid rgba(0,212,255,0.18);
  background:rgba(0,0,0,0.02);
  cursor:pointer;
  transition:background .15s, box-shadow .15s, border-color .15s;
}
.challenge-cell:hover { background:rgba(0,212,255,0.10); }
.challenge-cell.selected {
  background:rgba(0,212,255,0.24);
  border-color:rgba(0,212,255,0.7);
  box-shadow:inset 0 0 10px rgba(0,212,255,0.25);
}
.challenge-cell.correct {
  background:rgba(0,255,136,0.34);
  border-color:rgba(0,255,136,0.85);
  box-shadow:inset 0 0 12px rgba(0,255,136,0.35);
}
.challenge-cell.revealed {
  background:rgba(255,220,0,0.22);
  border-color:rgba(255,220,0,0.72);
}
.challenge-cell.miss {
  background:rgba(255,34,68,0.28);
  border-color:rgba(255,34,68,0.78);
}
.challenge-cell:disabled { cursor:default; }
.challenge-actions {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:8px;
}
.challenge-actions .btn { margin-bottom:0; padding:12px 6px; font-size:12px; letter-spacing:1px; }
.challenge-actions .btn:disabled {
  opacity:.45;
  cursor:not-allowed;
  box-shadow:none;
}
.challenge-classifier {
  width:100%;
  margin-top:8px;
}
.challenge-result {
  margin-top:10px;
  padding:10px;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.28);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  line-height:1.5;
}
.challenge-result-final {
  padding:14px;
  border-color:rgba(0,255,136,0.55);
  background:linear-gradient(180deg, rgba(0,255,136,0.12), rgba(0,0,0,0.36));
  box-shadow:0 0 22px rgba(0,255,136,0.12), inset 0 0 0 1px rgba(255,255,255,0.03);
  color:var(--bright);
}
.challenge-result-kicker {
  margin-bottom:10px;
  color:var(--accent2);
  font-size: 12px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
}
.challenge-score-grid {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:8px;
  margin-bottom:8px;
}
.challenge-score-card,
.challenge-score-total {
  border:1px solid rgba(0,212,255,0.28);
  border-radius:5px;
  background:rgba(0,0,0,0.32);
  padding:10px;
}
.challenge-score-label {
  display:block;
  margin-bottom:5px;
  color:var(--text);
  font-size: 12px;
  font-weight:700;
  letter-spacing:1.5px;
  text-transform:uppercase;
}
.challenge-score-value,
.challenge-score-defect,
.challenge-score-total-value {
  display:block;
  color:var(--accent2);
  font-size:28px;
  line-height:1;
  font-weight:700;
}
.challenge-score-defect {
  font-size:16px;
  line-height:1.15;
}
.challenge-score-defect.is-correct { color:var(--accent2); }
.challenge-score-defect.is-wrong { color:var(--danger); }
.challenge-score-total {
  display:grid;
  grid-template-columns:1fr auto;
  align-items:center;
  gap:4px 12px;
  border-color:rgba(0,255,136,0.62);
  background:rgba(0,255,136,0.08);
}
.challenge-score-total .challenge-score-label,
.challenge-score-total .challenge-score-note {
  grid-column:1;
}
.challenge-score-total-value {
  grid-column:2;
  grid-row:1 / span 2;
  font-size:36px;
  color:var(--accent2);
}
.challenge-score-note {
  display:block;
  margin-top:5px;
  color:var(--text);
  font-size: 12px;
  line-height:1.35;
}
.challenge-score-answer {
  margin-top:8px;
  padding-top:8px;
  border-top:1px solid rgba(255,255,255,0.08);
  color:var(--text);
  font-size: 12px;
}
.challenge-score-error {
  color:var(--danger);
}
.challenge-arena-actions {
  margin-top:10px;
}
.challenge-arena-actions .btn {
  margin-bottom:0;
}
@media (max-width: 420px) {
  .challenge-score-grid {
    grid-template-columns:1fr;
  }
  .challenge-score-total-value {
    font-size:32px;
  }
}

/* ===== UT ARENA ===== */
.arena-panel .panel-title span {
  color: var(--accent2);
}
.arena-transducer-panel {
  margin-bottom:12px;
}
.arena-transducer-panel .ctrl-group:last-child {
  margin-bottom:0;
}
.angle-range-labels {
  display:flex;
  justify-content:space-between;
  padding:0 2px;
  margin-top:2px;
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
}
.arena-mode-list {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px;
}
.arena-mode-card {
  min-height:96px;
  padding:14px;
  border:1px solid var(--border);
  border-radius:6px;
  background:rgba(0,0,0,0.30);
  color:var(--text);
  text-align:left;
  font-family:monospace;
  cursor:pointer;
}
.arena-mode-card.active {
  border-color:rgba(0,255,136,0.55);
  background:linear-gradient(180deg, rgba(0,255,136,0.10), rgba(0,0,0,0.28));
}
.arena-mode-card.locked {
  opacity:.65;
  cursor:default;
}
.arena-mode-card strong,
.arena-mode-card small,
.arena-mode-card span {
  display:block;
}
.arena-mode-card strong {
  margin:7px 0 5px;
  color:var(--bright);
  font-size:15px;
  letter-spacing:1px;
  text-transform:uppercase;
}
.arena-mode-card small {
  color:var(--text);
  line-height:1.45;
}
.arena-mode-kicker {
  color:var(--accent2);
  font-size: 12px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
}
.arena-author-grid {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:8px;
  margin-bottom:10px;
}
.arena-author-step {
  min-height:38px;
}
.arena-author-primary,
.arena-play-btn {
  color:var(--accent2);
  border-color:rgba(0,255,136,0.55);
}
.arena-launch-btn {
  margin:2px 0 0;
}
.arena-ranking-link {
  display:flex;
  align-items:center;
  justify-content:center;
  margin:12px 0 0;
  text-decoration:none;
}
.arena-launch-btn[hidden] {
  display:none !important;
}
.arena-danger-btn {
  color:var(--danger);
  border-color:rgba(255,34,68,0.55);
}
.arena-draft-status {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:8px;
  margin-bottom:12px;
}
.arena-draft-status span,
.arena-empty {
  padding:10px;
  border:1px dashed var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.20);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  line-height:1.45;
}
.arena-defect-builder {
  display:grid;
  gap:10px;
}
.arena-defect-builder .ctrl-group {
  margin-bottom:0;
}
.arena-duel-panel[hidden] {
  display:none !important;
}
.arena-duel-builder {
  display:grid;
  gap:10px;
}
.arena-duel-opponent-field {
  margin-bottom:0;
}
.arena-duel-panel .auth-field label {
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:1px;
  text-transform:uppercase;
}
.arena-duel-panel .auth-field select {
  width:100%;
  min-height:40px;
  background:#020810;
  color:var(--bright);
  border:1px solid var(--border);
  border-radius:5px;
  padding:0 10px;
  font-size:12px;
  font-weight:600;
}
.arena-duel-notice {
  margin-bottom:10px;
  padding:10px;
  border:1px solid rgba(0,255,136,0.35);
  border-radius:5px;
  background:rgba(0,255,136,0.08);
  color:var(--accent2);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  line-height:1.45;
}
.arena-duel-list-head {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  margin:14px 0 8px;
  color:var(--accent);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
}
.arena-duel-scoreboard {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:6px;
  margin-bottom:8px;
}
.arena-duel-scoreboard span {
  min-width:0;
  padding:7px 8px;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.24);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  line-height:1.35;
}
.arena-duel-scoreboard strong {
  display:block;
  color:var(--accent2);
  font-size:14px;
}
.arena-duel-reply-actions[hidden],
.arena-duel-reply-actions button[hidden] {
  display:none !important;
}
.arena-challenge-list,
.arena-leaderboard {
  display:grid;
  gap:8px;
}
.arena-challenge-card {
  padding:10px;
  border:1px solid var(--border);
  border-radius:6px;
  background:rgba(0,0,0,0.28);
}
.arena-challenge-card.selected {
  border-color:rgba(0,212,255,0.62);
  box-shadow:0 0 14px rgba(0,212,255,0.12);
}
.arena-challenge-top,
.arena-challenge-meta,
.arena-card-actions {
  display:flex;
  align-items:center;
  gap:8px;
}
.arena-challenge-top {
  justify-content:space-between;
  margin-bottom:8px;
}
.arena-challenge-top strong {
  display:block;
  color:var(--bright);
  font-family:monospace;
  font-size:12px;
  letter-spacing:.5px;
}
.arena-challenge-top small,
.arena-challenge-meta {
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
}
.arena-challenge-meta {
  justify-content:space-between;
  margin-bottom:8px;
  flex-wrap:wrap;
}
.arena-card-actions {
  flex-wrap:wrap;
}
.arena-card-actions .axis-btn {
  min-height:30px;
}
.arena-status {
  flex-shrink:0;
  padding:4px 8px;
  border-radius:999px;
  border:1px solid var(--border);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:1px;
  text-transform:uppercase;
}
.arena-status.published {
  color:var(--accent2);
  border-color:rgba(0,255,136,0.45);
  background:rgba(0,255,136,0.08);
}
.arena-status.archived {
  color:var(--warn);
  border-color:rgba(255,159,74,0.45);
  background:rgba(255,159,74,0.08);
}
.arena-status.pending,
.arena-status.accepted,
.arena-status.first_completed,
.arena-status.reply_sent {
  color:var(--accent2);
  border-color:rgba(0,255,136,0.45);
  background:rgba(0,255,136,0.08);
}
.arena-status.declined {
  color:var(--danger);
  border-color:rgba(255,34,68,0.45);
  background:rgba(255,34,68,0.08);
}
.arena-status.completed {
  color:var(--accent);
  border-color:rgba(0,212,255,0.45);
  background:rgba(0,212,255,0.08);
}
.arena-rank-row {
  display:grid;
  grid-template-columns:48px minmax(0, 1fr) auto;
  gap:8px;
  align-items:center;
  padding:10px;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.28);
  font-family:monospace;
}
.arena-rank-row strong {
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  color:var(--bright);
}
.arena-rank-row small {
  grid-column:2 / 4;
  color:var(--text);
  font-size: 12px;
}
.arena-rank-pos,
.arena-rank-score {
  color:var(--accent2);
  font-weight:800;
}
.arena-score-matrix {
  overflow:auto;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.25);
}
.arena-score-table {
  width:100%;
  min-width:520px;
  border-collapse:collapse;
  font-family:monospace;
  font-size: 12px;
}
.arena-score-table th,
.arena-score-table td {
  padding:9px 10px;
  border-bottom:1px solid rgba(255,255,255,0.06);
  border-right:1px solid rgba(255,255,255,0.06);
  color:var(--text);
  text-align:center;
  white-space:nowrap;
}
.arena-score-table th:first-child {
  text-align:left;
  color:var(--bright);
  position:sticky;
  left:0;
  background:var(--panel);
}
.arena-score-table thead th {
  color:var(--accent);
  background:rgba(0,0,0,0.35);
  position:sticky;
  top:0;
  z-index:1;
}
.arena-msg {
  margin-top:10px;
}

/* ===== UT ACADEMY / MODO INSTRUTOR ===== */
.challenge-student-panel {
  border-color:rgba(0,210,255,0.22);
}
.instructor-panel .auth-field {
  margin-bottom:0;
}
.instructor-panel .auth-field label {
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:1px;
  text-transform:uppercase;
}
.instructor-panel input,
.instructor-panel select,
.instructor-panel textarea,
.instructor-join-row input {
  width:100%;
  min-height:40px;
  background:#020810;
  color:var(--bright);
  border:1px solid var(--border);
  border-radius:5px;
  padding:0 10px;
  font-size:12px;
  font-weight:600;
}
.instructor-panel textarea {
  min-height:72px;
  padding:10px;
  resize:vertical;
  line-height:1.45;
}
.instructor-locked-note,
.instructor-msg {
  margin:10px 0;
  padding:10px;
  border:1px solid rgba(0,210,255,0.35);
  border-radius:5px;
  background:rgba(0,210,255,0.08);
  color:var(--accent);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  line-height:1.45;
}
.instructor-msg.error {
  border-color:rgba(255,34,68,0.45);
  background:rgba(255,34,68,0.08);
  color:var(--danger);
}
.instructor-msg.ok {
  border-color:rgba(0,255,136,0.35);
  background:rgba(0,255,136,0.08);
  color:var(--accent2);
}
.instructor-metric-grid {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:8px;
  margin:12px 0;
}
.instructor-metric-card {
  padding:12px;
  border:1px solid rgba(0,210,255,0.22);
  border-radius:6px;
  background:linear-gradient(180deg, rgba(0,210,255,0.08), rgba(0,0,0,0.24));
  font-family:monospace;
}
.instructor-metric-card span,
.instructor-metric-card strong,
.instructor-metric-card small {
  display:block;
}
.instructor-metric-card span {
  color:var(--text);
  font-size:10px;
  letter-spacing:1px;
  text-transform:uppercase;
}
.instructor-metric-card strong {
  color:var(--accent2);
  font-size:24px;
  line-height:1.2;
  margin:3px 0;
}
.instructor-metric-card small {
  color:var(--text);
  font-size:11px;
  line-height:1.35;
}
.instructor-module-grid {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:8px;
}
.instructor-module-card {
  min-height:88px;
  padding:12px;
  border:1px solid var(--border);
  border-radius:8px;
  background:rgba(0,0,0,0.26);
  color:var(--text);
  text-align:left;
  font-family:monospace;
  cursor:pointer;
}
.instructor-module-card:hover,
.instructor-module-card:focus-visible {
  border-color:rgba(0,255,136,0.55);
}
.instructor-module-card span,
.instructor-module-card strong,
.instructor-module-card small {
  display:block;
}
.instructor-module-card span {
  color:var(--accent2);
  font-size:22px;
}
.instructor-module-card strong {
  color:var(--accent);
  letter-spacing:1.5px;
  margin:4px 0;
}
.instructor-module-card small {
  font-size:11px;
  line-height:1.35;
}
.instructor-module-card.locked {
  opacity:.74;
  cursor:default;
}
.instructor-tabs {
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:8px;
  margin:12px 0;
}
.instructor-tab {
  min-height:42px;
  border:1px solid var(--border);
  border-radius:6px;
  background:rgba(0,0,0,0.24);
  color:var(--text);
  font-family:monospace;
  font-size:12px;
  font-weight:800;
  letter-spacing:1px;
  cursor:pointer;
}
.instructor-tab.active,
.instructor-tab:focus-visible {
  color:var(--accent2);
  border-color:rgba(0,255,136,0.55);
  background:rgba(0,255,136,0.08);
}
.instructor-form-grid,
.instructor-builder-grid,
.instructor-assign-row,
.instructor-join-row {
  display:grid;
  grid-template-columns:1fr auto;
  gap:8px;
  align-items:end;
  margin-bottom:12px;
}
.instructor-builder-grid {
  grid-template-columns:1fr 1fr 1fr;
  align-items:start;
}
.instructor-assign-row {
  grid-template-columns:1fr 1fr auto;
}
.instructor-join-row {
  grid-template-columns:1fr auto;
}
.instructor-two-col {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.instructor-list-head {
  margin:0 0 8px;
  color:var(--accent);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
}
.instructor-search {
  margin-bottom:8px;
}
.instructor-student-picker {
  max-height:260px;
  overflow:auto;
  display:grid;
  gap:6px;
  margin:8px 0;
}
.instructor-student-option {
  display:flex;
  align-items:flex-start;
  gap:8px;
  padding:9px;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.22);
  color:var(--text);
  font-family:monospace;
}
.instructor-student-option input {
  width:auto;
  min-height:auto;
  margin-top:3px;
}
.instructor-student-option strong,
.instructor-student-option small {
  display:block;
}
.instructor-student-option strong {
  color:var(--bright);
}
.instructor-student-option small {
  font-size:11px;
  line-height:1.35;
}
.instructor-wide-btn {
  width:100%;
}
.instructor-feature-list {
  display:grid;
  gap:8px;
}
.instructor-feature-list span {
  padding:10px;
  border:1px dashed var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.20);
  color:var(--text);
  font-family:monospace;
  font-size:12px;
  line-height:1.45;
}
.instructor-locked-content {
  opacity:.4;
  pointer-events:none;
}
.instructor-filter-grid,
.instructor-results-filters {
  display:grid;
  grid-template-columns:2fr 1fr 1fr auto;
  gap:8px;
  align-items:end;
  margin-bottom:12px;
}
.instructor-results-filters {
  grid-template-columns:repeat(4, minmax(0, 1fr)) auto;
}
.instructor-selected-class-card {
  display:grid;
  gap:4px;
  margin-bottom:12px;
  padding:12px;
  border:1px solid rgba(0,255,136,0.35);
  border-radius:6px;
  background:rgba(0,255,136,0.07);
  color:var(--text);
  font-family:monospace;
  font-size:12px;
  line-height:1.4;
}
.instructor-selected-class-card strong {
  color:var(--bright);
  font-size:14px;
}
.instructor-selected-class-card span {
  color:var(--accent2);
  font-weight:800;
}
.instructor-member-list {
  margin-bottom:14px;
}
.instructor-tag-row {
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin:8px 0;
}
.instructor-tag-row span {
  padding:4px 7px;
  border:1px solid rgba(0,210,255,0.32);
  border-radius:999px;
  background:rgba(0,210,255,0.08);
  color:var(--accent);
  font-family:monospace;
  font-size:11px;
}
.instructor-author-panel {
  margin-top:14px;
  padding-top:14px;
  border-top:1px solid var(--border);
}
.instructor-author-steps {
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:8px;
  margin-bottom:12px;
}
.instructor-author-steps span {
  display:flex;
  align-items:center;
  gap:8px;
  min-height:38px;
  padding:8px;
  border:1px dashed var(--border);
  border-radius:6px;
  color:var(--text);
  font-family:monospace;
  font-size:12px;
}
.instructor-author-steps b {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:22px;
  height:22px;
  border-radius:50%;
  border:1px solid currentColor;
}
.instructor-author-steps span.active {
  border-style:solid;
  color:var(--accent2);
  background:rgba(0,255,136,0.07);
}
.instructor-author-data {
  grid-template-columns:1fr 1fr;
}
.instructor-author-block {
  margin-top:12px;
  padding:12px;
  border:1px solid rgba(0,210,255,0.20);
  border-radius:8px;
  background:rgba(0,0,0,0.18);
}
.instructor-author-block-head {
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:12px;
  margin-bottom:10px;
  font-family:monospace;
}
.instructor-author-block-head strong,
.instructor-author-block-head small {
  display:block;
}
.instructor-author-block-head strong {
  color:var(--bright);
}
.instructor-author-block-head small {
  margin-top:4px;
  color:var(--text);
  line-height:1.4;
}
.instructor-piece-context {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
  padding:12px;
  border:1px solid rgba(0,255,136,0.42);
  border-radius:8px;
  background:rgba(0,255,136,0.08);
  color:var(--text);
  font-family:monospace;
}
.instructor-piece-context[hidden] {
  display:none !important;
}
.instructor-piece-context strong,
.instructor-piece-context span {
  display:block;
}
.instructor-piece-context strong {
  color:var(--accent2);
  letter-spacing:1px;
}
.instructor-piece-context span {
  margin-top:4px;
  font-size:12px;
  line-height:1.4;
}
.instructor-context-actions {
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  justify-content:flex-end;
}
.instructor-results-actions {
  display:flex;
  justify-content:flex-end;
  gap:8px;
  flex-wrap:wrap;
  margin-bottom:12px;
}
.instructor-filter-field {
  min-width:0;
}
.instructor-filter-field label {
  display:block;
  margin-bottom:6px;
  color:var(--text);
  font-family:monospace;
  font-size:10px;
  font-weight:800;
  letter-spacing:1px;
  text-transform:uppercase;
}
.instructor-results-toolbar {
  margin-bottom:14px;
  padding:12px;
  border:1px solid rgba(0,210,255,0.18);
  border-radius:8px;
  background:rgba(0,0,0,0.16);
}
.instructor-result-summary {
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:8px;
  margin-bottom:12px;
}
.instructor-result-summary span {
  padding:10px;
  border:1px solid rgba(0,210,255,0.22);
  border-radius:6px;
  background:rgba(0,0,0,0.22);
  font-family:monospace;
}
.instructor-result-summary small,
.instructor-result-summary strong {
  display:block;
}
.instructor-result-summary small {
  color:var(--text);
  font-size:11px;
  text-transform:uppercase;
}
.instructor-result-summary strong {
  color:var(--accent2);
  font-size:20px;
}
.instructor-results-table-wrap {
  overflow:auto;
  border:1px solid var(--border);
  border-radius:8px;
}
.instructor-results-table {
  width:100%;
  min-width:760px;
  border-collapse:collapse;
  font-family:monospace;
  font-size:12px;
}
.instructor-results-table th,
.instructor-results-table td {
  padding:9px;
  border-bottom:1px solid var(--border);
  color:var(--text);
  text-align:left;
  white-space:pre-line;
  vertical-align:top;
}
.instructor-results-table th {
  position:sticky;
  top:0;
  color:var(--accent);
  background:#020810;
  z-index:1;
}

.arena-transducer-panel {
  padding:0;
  overflow:hidden;
}
.arena-transducer-summary {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  cursor:pointer;
  list-style:none;
}
.arena-transducer-summary::-webkit-details-marker {
  display:none;
}
.arena-transducer-summary .panel-title {
  margin:0;
  padding:0;
  border:0;
}
.arena-transducer-readout {
  color:var(--accent2);
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  white-space:nowrap;
}
.arena-transducer-grid {
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px 14px;
  padding:0 14px 14px;
}
.arena-transducer-grid .ctrl-group {
  margin-bottom:0;
}
.arena-hero-head,
.arena-panel-head,
.arena-section-head {
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  margin-bottom:12px;
}
.arena-hero-head .panel-title,
.arena-panel-head .panel-title,
.arena-section-head .panel-title {
  margin-bottom:6px;
}
.arena-kicker,
.arena-section-kicker {
  margin-bottom:5px;
  color:var(--accent2);
  font-family:monospace;
  font-size: 12px;
  font-weight:800;
  letter-spacing:2px;
  text-transform:uppercase;
}
.arena-hero-summary,
.arena-section-subtitle {
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
  line-height:1.45;
}
.arena-next-btn {
  min-width:150px;
  margin:0;
  align-self:center;
}
.arena-mode-card {
  min-height:76px;
}
.arena-mode-card.active {
  box-shadow:0 0 0 1px rgba(0,255,136,0.20), 0 0 18px rgba(0,255,136,0.12);
}
.arena-quick-stats {
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:8px;
  margin-top:12px;
}
.arena-quick-stats span {
  min-width:0;
  padding:9px 10px;
  border:1px solid rgba(255,255,255,0.08);
  border-radius:5px;
  background:rgba(0,0,0,0.24);
  font-family:monospace;
}
.arena-quick-stats strong,
.arena-quick-stats small {
  display:block;
}
.arena-quick-stats strong {
  color:var(--bright);
  font-size:16px;
}
.arena-quick-stats small {
  color:var(--text);
  font-size: 12px;
  line-height:1.35;
}
.arena-flow {
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:8px;
  margin-bottom:12px;
}
.arena-flow-step {
  display:flex;
  align-items:flex-start;
  gap:8px;
  min-width:0;
  padding:9px;
  border:1px solid var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.22);
  font-family:monospace;
}
.arena-flow-step > span {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 22px;
  width:22px;
  height:22px;
  border:1px solid var(--border);
  border-radius:50%;
  color:var(--text);
  font-size: 12px;
  font-weight:800;
}
.arena-flow-step strong,
.arena-flow-step small {
  display:block;
  min-width:0;
}
.arena-flow-step strong {
  color:var(--bright);
  font-size: 12px;
  text-transform:uppercase;
}
.arena-flow-step small {
  margin-top:3px;
  color:var(--text);
  font-size: 12px;
  line-height:1.35;
}
.arena-flow-step[data-state="active"] {
  border-color:rgba(0,212,255,0.55);
  background:rgba(0,212,255,0.08);
}
.arena-flow-step[data-state="active"] > span {
  color:var(--accent);
  border-color:rgba(0,212,255,0.60);
}
.arena-flow-step[data-state="done"] {
  border-color:rgba(0,255,136,0.48);
  background:rgba(0,255,136,0.08);
}
.arena-flow-step[data-state="done"] > span,
.arena-flow-step[data-state="done"] small {
  color:var(--accent2);
}
.arena-author-locked-note {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:10px 12px;
  margin-bottom:12px;
  border:1px dashed var(--border);
  border-radius:5px;
  background:rgba(0,0,0,0.18);
  color:var(--text);
  font-family:monospace;
  font-size: 12px;
}
.arena-author-locked-note[hidden] {
  display:none !important;
}
.arena-author-locked-note strong {
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:1px;
}
.arena-primary-action {
  color:var(--accent2);
  border-color:rgba(0,255,136,0.60);
  background:rgba(0,255,136,0.08);
}
.arena-challenge-card.needs-action {
  border-color:rgba(0,255,136,0.50);
}
.arena-duel-group-title {
  margin-top:4px;
  color:var(--accent);
  font-family:monospace;
  font-size: 12px;
  font-weight:800;
  letter-spacing:1.5px;
  text-transform:uppercase;
}
.arena-duel-group-title:first-child {
  margin-top:0;
}
.arena-ranking-preview-link {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:30px;
  text-decoration:none;
}
.arena-ranking-preview-panel[hidden] {
  display:none !important;
}
.arena-ranking-preview-list .arena-rank-row {
  grid-template-columns:42px minmax(0, 1fr) auto;
}

/* ===== UT ARENA RANKING PAGE ===== */
.access-card.arena-ranking-card {
  width:min(980px, 100%);
}
.arena-score-map-page .access-card.arena-ranking-card {
  width:min(1180px, 100%);
}
.arena-ranking-card .auth-card-title {
  letter-spacing:2px;
}
.arena-ranking-toolbar {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:18px;
}
.arena-ranking-nav {
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
}
.arena-ranking-toolbar .access-back-link,
.arena-ranking-nav .access-back-link {
  margin-top:0;
}
.arena-ranking-nav .access-back-link + .access-back-link {
  padding-left:12px;
  border-left:1px solid #d0dae6;
}
.arena-ranking-refresh {
  min-height:36px;
  padding:0 14px;
  border:1px solid #1B5FBB;
  border-radius:6px;
  background:#ffffff;
  color:#1B5FBB;
  font-family:monospace;
  font-size: 12px;
  font-weight:700;
  letter-spacing:1px;
  cursor:pointer;
}
.arena-ranking-refresh:disabled {
  opacity:.55;
  cursor:not-allowed;
}
.arena-ranking-hero {
  position:relative;
  overflow:hidden;
  margin-bottom:16px;
  padding:22px;
  border:1px solid rgba(27,95,187,0.22);
  border-radius:14px;
  background:
    radial-gradient(circle at 88% 18%, rgba(255,196,79,0.24), transparent 30%),
    linear-gradient(135deg, #102a57 0%, #1B5FBB 52%, #0d1e3d 100%);
  color:#ffffff;
  box-shadow:0 18px 42px rgba(17,40,78,0.16);
}
.arena-ranking-hero::after {
  content:"";
  position:absolute;
  inset:auto -20px -54px 38%;
  height:150px;
  border-radius:999px;
  background:rgba(255,255,255,0.12);
  transform:rotate(-8deg);
}
.arena-ranking-kicker {
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:10px;
  padding:6px 10px;
  border:1px solid rgba(255,255,255,0.32);
  border-radius:999px;
  background:rgba(255,255,255,0.12);
  font-family:monospace;
  font-size:11px;
  font-weight:800;
  letter-spacing:1.6px;
}
.arena-ranking-hero h1 {
  position:relative;
  z-index:1;
  max-width:640px;
  margin:0 0 8px;
  font-family:var(--ui-font);
  font-size:clamp(28px, 4vw, 48px);
  line-height:.98;
  text-transform:uppercase;
}
.arena-ranking-hero p {
  position:relative;
  z-index:1;
  max-width:660px;
  margin:0;
  color:rgba(255,255,255,0.82);
  font-family:var(--ui-font);
  font-size:14px;
  line-height:1.55;
}
.arena-ranking-stats {
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:10px;
  margin-top:18px;
}
.arena-ranking-stats div {
  min-width:0;
  padding:12px;
  border:1px solid rgba(255,255,255,0.22);
  border-radius:10px;
  background:rgba(255,255,255,0.13);
  backdrop-filter:blur(8px);
}
.arena-ranking-stats span,
.arena-ranking-stats small {
  display:block;
}
.arena-ranking-stats span {
  overflow:hidden;
  color:#ffffff;
  font-family:monospace;
  font-size:18px;
  font-weight:900;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.arena-ranking-stats small {
  margin-top:4px;
  color:rgba(255,255,255,0.7);
  font-family:monospace;
  font-size:10px;
  font-weight:800;
  letter-spacing:1px;
  text-transform:uppercase;
}
.arena-ranking-layout {
  display:grid;
  gap:12px;
}
.arena-ranking-section {
  padding:14px;
  border:1px solid #d9e4f1;
  border-radius:12px;
  background:linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}
.arena-ranking-section-intro {
  margin:4px 0 12px;
  color:#6b7f96;
  font-size:13px;
  line-height:1.45;
}
.arena-ranking-page .auth-field select {
  width:100%;
  min-height:42px;
  background:#f4f7fb;
  border:1px solid #d0dae6;
  border-radius:6px;
  color:#2E3F54;
  padding:10px 12px;
  font-family:var(--ui-font);
  font-size:14px;
}
.arena-ranking-page .arena-ranking-list {
  display:grid;
  gap:8px;
}
.arena-ranking-page .arena-rank-header {
  display:grid;
  grid-template-columns:58px minmax(0, 1fr) minmax(120px, auto) minmax(132px, auto);
  gap:12px;
  align-items:center;
  padding:0 12px;
  color:#6b7f96;
  font-size:11px;
  font-weight:800;
  text-transform:uppercase;
}
.arena-ranking-page .arena-empty {
  border-color:#d0dae6;
  background:#f4f7fb;
  color:#6b7f96;
}
.arena-ranking-page .arena-rank-row {
  grid-template-columns:58px minmax(0, 1fr) minmax(120px, auto) minmax(132px, auto);
  min-height:64px;
  border-color:#d0dae6;
  border-radius:10px;
  background:#ffffff;
  box-shadow:0 8px 20px rgba(24,52,88,0.06);
}
.arena-ranking-page .arena-rank-row strong {
  color:#2E3F54;
  font-size:15px;
}
.arena-ranking-page .arena-rank-row small {
  color:#6b7f96;
  grid-column:2 / 5;
}
.arena-ranking-page .arena-rank-pos,
.arena-ranking-page .arena-rank-score,
.arena-ranking-page .arena-rank-challenges {
  color:#1B5FBB;
}
.arena-ranking-page .arena-rank-score,
.arena-ranking-page .arena-rank-challenges {
  padding:6px 10px;
  border-radius:999px;
  background:#eef5ff;
  text-align:center;
  font-weight:800;
  white-space:nowrap;
}
.arena-ranking-page .arena-rank-row.rank-champion,
.arena-ranking-page .arena-rank-row.rank-runner-up,
.arena-ranking-page .arena-rank-row.rank-third {
  position:relative;
  overflow:hidden;
  border-width:1px;
}
.arena-ranking-page .arena-rank-row.rank-champion::before,
.arena-ranking-page .arena-rank-row.rank-runner-up::before,
.arena-ranking-page .arena-rank-row.rank-third::before {
  content:"CAMPEAO";
  position:absolute;
  top:8px;
  right:-34px;
  width:126px;
  padding:3px 0;
  color:#ffffff;
  font-family:monospace;
  font-size:9px;
  font-weight:900;
  letter-spacing:1px;
  text-align:center;
  transform:rotate(34deg);
}
.arena-ranking-page .arena-rank-row.rank-champion {
  border-color:#f2b84b;
  background:linear-gradient(135deg, #fff8e8 0%, #ffffff 58%);
}
.arena-ranking-page .arena-rank-row.rank-runner-up {
  border-color:#b8c5d6;
  background:linear-gradient(135deg, #f4f7fb 0%, #ffffff 58%);
}
.arena-ranking-page .arena-rank-row.rank-third {
  border-color:#d89a62;
  background:linear-gradient(135deg, #fff1e8 0%, #ffffff 58%);
}
.arena-ranking-page .arena-rank-row.rank-champion::before {
  background:#d89a19;
}
.arena-ranking-page .arena-rank-row.rank-runner-up::before {
  content:"2o LUGAR";
  background:#7c8ca0;
}
.arena-ranking-page .arena-rank-row.rank-third::before {
  content:"3o LUGAR";
  background:#b86d36;
}
.arena-ranking-page .arena-rank-row.rank-champion .arena-rank-pos,
.arena-ranking-page .arena-rank-row.rank-champion .arena-rank-score,
.arena-ranking-page .arena-rank-row.rank-champion .arena-rank-challenges {
  color:#a46c00;
}
.arena-ranking-page .arena-rank-row.rank-runner-up .arena-rank-pos,
.arena-ranking-page .arena-rank-row.rank-runner-up .arena-rank-score,
.arena-ranking-page .arena-rank-row.rank-runner-up .arena-rank-challenges {
  color:#657589;
}
.arena-ranking-page .arena-rank-row.rank-third .arena-rank-pos,
.arena-ranking-page .arena-rank-row.rank-third .arena-rank-score,
.arena-ranking-page .arena-rank-row.rank-third .arena-rank-challenges {
  color:#9b5423;
}
.arena-ranking-page .arena-score-matrix {
  overflow-x:auto;
  border-color:#d0dae6;
  background:#ffffff;
  border-radius:10px;
}
.arena-ranking-page .arena-ranking-map-link {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:0 14px;
  border:1px solid #1B5FBB;
  border-radius:6px;
  background:#1B5FBB;
  color:#ffffff;
  font-family:monospace;
  font-size:12px;
  font-weight:800;
  letter-spacing:.8px;
  text-decoration:none;
  text-transform:uppercase;
}
.arena-score-map-page .arena-score-table {
  min-width:max-content;
}
.arena-ranking-page .arena-score-table th,
.arena-ranking-page .arena-score-table td {
  border-bottom:1px solid #edf2f7;
  border-right:1px solid #edf2f7;
  color:#2E3F54;
}
.arena-ranking-page .arena-score-table th:first-child {
  color:#2E3F54;
  background:#ffffff;
}
.arena-ranking-page .arena-score-table thead th {
  color:#ffffff;
  background:#1B5FBB;
}
.arena-ranking-msg {
  margin-bottom:18px;
}
@media (max-width: 560px) {
  .arena-mode-list,
  .arena-author-grid,
  .arena-draft-status,
  .arena-duel-scoreboard,
  .arena-transducer-grid,
  .arena-quick-stats,
  .arena-flow {
    grid-template-columns:1fr;
  }
  .arena-hero-head,
  .arena-panel-head,
  .arena-section-head,
  .arena-author-locked-note {
    align-items:stretch;
    flex-direction:column;
  }
  .arena-next-btn {
    width:100%;
  }
  .arena-transducer-summary {
    align-items:flex-start;
    flex-direction:column;
  }
  .arena-transducer-readout {
    white-space:normal;
  }
  .arena-duel-list-head {
    align-items:stretch;
    flex-direction:column;
  }
  .arena-duel-list-head .axis-btn {
    width:100%;
  }
  .arena-ranking-toolbar {
    align-items:stretch;
    flex-direction:column;
  }
  .arena-ranking-nav {
    align-items:stretch;
    flex-direction:column;
    gap:8px;
  }
  .arena-ranking-nav .access-back-link + .access-back-link {
    padding-left:0;
    border-left:0;
  }
  .arena-ranking-refresh {
    width:100%;
  }
  .arena-ranking-hero {
    padding:18px;
  }
  .arena-ranking-stats {
    grid-template-columns:1fr;
  }
  .arena-ranking-page .arena-rank-header {
    display:none;
  }
  .arena-ranking-page .arena-rank-row {
    grid-template-columns:48px minmax(0, 1fr);
  }
  .arena-ranking-page .arena-rank-score,
  .arena-ranking-page .arena-rank-challenges {
    grid-column:2;
    justify-self:start;
  }
  .arena-ranking-page .arena-rank-row small {
    grid-column:1 / 3;
  }
}
/* ===== METRICS ===== */
.metrics-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-bottom:12px; }
.metric-card {
  background:rgba(0,0,0,0.35);
  border:1px solid var(--border);
  border-radius:4px;
  padding:10px;
  text-align:center;
}
.metric-lbl { font-family:monospace; font-size: 12px; letter-spacing:2px; color:var(--text); text-transform:uppercase; }
.metric-val { font-family:monospace; font-size:24px; font-weight:700; color:var(--accent2); line-height:1.1; }
.metric-val.warn   { color:var(--warn); }
.metric-val.danger { color:var(--danger); animation:blink .7s infinite; }
.metric-unit { font-size: 12px; color:var(--text); }

/* ===== LOG ===== */
.log-area {
  background:rgba(0,0,0,0.5);
  border:1px solid var(--border);
  border-radius:4px;
  padding:10px;
  height:140px;
  overflow-y:auto;
  font-family:monospace;
  font-size: 12px;
  line-height:1.8;
  -webkit-overflow-scrolling:touch;
}
.log-entry        { color:var(--text); }
.log-entry.ok     { color:var(--accent2); }
.log-entry.warn   { color:var(--warn); }
.log-entry.error  { color:var(--danger); }

/* ===== REPORT ===== */
.report-area {
  font-family:monospace; font-size:12px;
  line-height:1.9; color:var(--text);
  background:rgba(0,0,0,.3);
  border:1px solid var(--border);
  border-radius:4px;
  padding:12px;
  margin-bottom:12px;
  min-height:80px;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width:3px; }
::-webkit-scrollbar-track { background:var(--bg); }
::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }

/* ===== WELD GEOMETRY ===== */
.piece-summary {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 12px;
  margin-bottom: 12px;
  background: rgba(2,8,16,0.96);
  border: 1px solid rgba(0,212,255,0.32);
  border-radius: 6px;
  box-shadow: 0 10px 26px rgba(0,0,0,0.22);
  backdrop-filter: blur(8px);
}
:root.light .piece-summary {
  background: rgba(255,255,255,0.96);
  box-shadow: 0 10px 24px rgba(27,95,187,0.08);
}
.piece-summary-main {
  min-width: 0;
  display: grid;
  gap: 3px;
}
.piece-summary-main span,
.piece-summary-grid small {
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}
.piece-summary-main strong {
  color: var(--accent2);
  font-family: monospace;
  font-size: 13px;
  letter-spacing: .7px;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}
.piece-summary-main small {
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  line-height: 1.45;
}
.piece-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.piece-summary-grid span {
  min-width: 0;
  display: grid;
  gap: 2px;
  padding: 8px;
  background: rgba(0,0,0,0.24);
  border: 1px solid var(--border);
  border-radius: 5px;
}
.piece-summary-grid b {
  min-width: 0;
  color: var(--bright);
  font-family: monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}
.piece-scan-btn,
.piece-scan-main-btn {
  margin: 0;
}
.piece-step-title {
  display: flex;
  align-items: center;
  gap: 8px;
}
.piece-step-title span {
  width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(0,255,136,0.42);
  border-radius: 50%;
  color: var(--accent2);
  background: rgba(0,255,136,0.08);
  letter-spacing: 0;
  flex-shrink: 0;
}
.piece-step-copy,
.piece-custom-hint {
  margin: -4px 0 12px;
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  line-height: 1.55;
}
.piece-custom-hint {
  margin: 8px 0 12px;
  color: var(--accent);
}
.piece-detail-title {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.weld-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
.weld-card {
  background: rgba(0,0,0,0.35);
  border: 2px solid var(--border);
  border-radius: 6px;
  padding: 10px 8px 8px;
  cursor: pointer;
  transition: all .2s;
  text-align: center;
  position: relative;
  overflow: hidden;
  width: 100%;
  color: inherit;
  font-family: inherit;
  appearance: none;
}
.weld-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.weld-card::before {
  content:'';
  position:absolute; top:0; left:0; right:0; height:2px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  transition: background .2s;
}
.weld-card.selected {
  border-color: var(--accent2);
  background: rgba(0,255,136,0.06);
  box-shadow: 0 0 14px rgba(0,255,136,0.2);
}
.weld-card.selected::before {
  background: linear-gradient(90deg, transparent, var(--accent2), transparent);
}
.weld-card canvas {
  display: block;
  width: 100%;
  margin-bottom: 6px;
  border-radius: 3px;
}
.weld-name {
  font-family: monospace;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--text);
  text-transform: uppercase;
  line-height: 1.3;
  white-space: pre-line;
  overflow-wrap: anywhere;
}
.weld-card.selected .weld-name { color: var(--accent2); }
.weld-card-kicker {
  margin-bottom: 4px;
  color: var(--accent);
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.3px;
  text-transform: uppercase;
}
.weld-desc {
  margin-top: 6px;
  min-height: 30px;
  color: var(--text);
  font-family: monospace;
  font-size: 12px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}
.weld-card-action {
  margin-top: 8px;
  padding: 5px 6px;
  border: 1px solid rgba(0,255,136,0.38);
  border-radius: 4px;
  color: var(--accent2);
  background: rgba(0,255,136,0.08);
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.weld-check {
  position: absolute;
  top: 6px; right: 8px;
  font-size: 12px;
  color: var(--accent2);
  display: none;
}
.weld-card.selected .weld-check { display: block; }

.weld-detail-canvas {
  width: 100%;
  display: block;
  border-radius: 4px;
  background: #010c18;
  border: 1px solid var(--border);
  margin-bottom: 10px;
}

.info-row {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  padding: 8px 10px;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 6px;
  font-family: monospace;
  font-size: 12px;
}
.info-row .lbl { color: var(--text); letter-spacing: 1px; }
.info-row .val {
  min-width: 0;
  max-width: 62%;
  color: var(--accent2);
  font-weight: 700;
  text-align: right;
  overflow-wrap: anywhere;
}

@media (max-width: 520px) {
  .piece-summary-grid {
    grid-template-columns: 1fr;
  }
  .info-row {
    display: grid;
    grid-template-columns: 1fr;
  }
  .info-row .val {
    max-width: none;
    text-align: left;
  }
}

/* ========================================================= */
/* RESPONSIVE LAYOUTS                                        */
/* ========================================================= */
/* Mobile-first é o padrão (regras acima). Estas media queries
   adaptam o layout para tablets e desktops, mantendo a mesma
   estrutura HTML e abas.                                     */

/* ----- TABLET: 768px – 1023px ----- */
@media (max-width: 767px) {
  :root {
    --header-h: 60px;
    --tab-h: 70px;
  }

  body {
    font-size: 14px;
    touch-action: manipulation;
  }

  .mobile-only { display: flex !important; }

  .instructor-metric-grid,
  .instructor-module-grid,
  .instructor-tabs,
  .instructor-form-grid,
  .instructor-builder-grid,
  .instructor-assign-row,
  .instructor-join-row,
  .instructor-two-col,
  .instructor-filter-grid,
  .instructor-results-filters,
  .instructor-author-steps,
  .instructor-author-data,
  .instructor-result-summary {
    grid-template-columns:1fr;
  }
  .instructor-piece-context,
  .instructor-author-block-head {
    align-items:stretch;
    flex-direction:column;
  }
  .instructor-context-actions {
    justify-content:stretch;
  }
  .instructor-context-actions .axis-btn {
    flex:1 1 auto;
  }

  .app-header {
    padding-left: 10px;
    padding-right: 10px;
    gap: 8px;
  }
  .header-logo-img {
    width: min(118px, 31vw);
    height: auto;
    max-height: 44px;
  }
  .header-app-version { display: none; }
  .hdr-status {
    flex: 0 0 auto;
    gap: 8px;
  }
  .hdr-status-right {
    margin-left: auto;
    text-align: right;
  }
  .hdr-mode {
    max-width: 96px;
    overflow: hidden;
    font-size: 12px;
    letter-spacing: .4px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .hdr-status-pill {
    max-width: 96px;
    padding: 3px 8px;
    overflow: hidden;
    font-size: 12px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .mobile-menu-btn {
    min-width: 52px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    border: 1px solid #c5d5f0;
    border-radius: 6px;
    background: #f0f5ff;
    color: #1B5FBB;
    font: 800 12px/1 var(--ui-font);
    letter-spacing: .5px;
  }

  .mobile-popover {
    position: fixed;
    z-index: 180;
    flex-direction: column;
    gap: 10px;
    border: 1px solid var(--border);
    background: var(--panel);
    box-shadow: 0 14px 36px rgba(0,0,0,.38);
  }
  .mobile-popover[hidden] { display: none !important; }
  .mobile-menu-title {
    color: var(--accent);
    font: 800 12px/1.2 var(--ui-font);
    letter-spacing: .7px;
    text-transform: uppercase;
  }
  .mobile-header-menu {
    top: calc(var(--header-h) + var(--safe-top) + 8px);
    right: 10px;
    left: 10px;
    max-height: calc(100dvh - var(--header-h) - var(--tab-h) - 30px);
    padding: 14px;
    overflow-y: auto;
    border-radius: 10px;
  }
  .mobile-header-menu-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    align-items: center;
  }
  .mobile-header-menu-items .header-lang-switch {
    min-height: 48px;
    justify-content: center;
    grid-column: 1 / -1;
  }
  .mobile-header-menu-items .lang-btn,
  .mobile-header-menu-items .theme-btn,
  .mobile-header-menu-items .account-btn,
  .mobile-header-menu-items .logout-btn,
  .mobile-header-menu-items .user-rank-pill {
    width: 100%;
    min-height: 44px;
    justify-content: center;
    border-radius: 6px;
    font-size: 14px;
  }
  .mobile-header-menu-items .theme-btn {
    border: 1px solid var(--border);
  }
  .mobile-header-menu-items .user-rank-pill {
    grid-column: 1 / -1;
  }
  .mobile-header-menu-items .user-rank-pill span { display: inline; }

  .content-area {
    scroll-padding-bottom: 92px;
  }
  .tab-page {
    padding: 8px 8px 20px;
  }
  .panel {
    padding: 12px 10px;
    margin-bottom: 10px;
  }
  .panel-title {
    font-size: 13px;
    letter-spacing: 1px;
    line-height: 1.35;
  }
  .ctrl-label,
  .slider-val,
  select,
  .axis-btn,
  .gain-btn,
  .defect-btn,
  .defect-mode-btn {
    font-size: 14px;
  }

  .tab-btn {
    min-width: 0;
    min-height: 44px;
    padding: 6px 2px;
    font-size: 10px;
    letter-spacing: 0;
  }
  .tab-icon { font-size: 18px; }
  .tab-icon.transducer-icon,
  .tab-icon.transducer-icon svg,
  .tab-icon.library-icon,
  .tab-icon.library-icon svg,
  .tab-icon.academy-icon,
  .tab-icon.academy-icon svg {
    width: 21px;
    height: 21px;
  }
  .library-card-grid {
    grid-template-columns: 1fr;
  }

  .scan-wrap {
    margin-right: -4px;
    margin-left: -4px;
    padding: 8px;
  }
  #canvasAScan,
  #challengeCanvasAScan {
    width: 100%;
    height: 160px;
  }
  .scan-hdr {
    gap: 8px;
    font-size: 12px;
    letter-spacing: .7px;
  }
  .gain-btn,
  .axis-btn,
  .defect-mode-btn,
  .defect-remove-btn,
  .draw-toolbar .axis-btn,
  .arena-card-actions .axis-btn {
    min-width: 44px;
    min-height: 44px;
    padding: 9px 12px;
  }
  .tip-btn {
    width: 24px;
    height: 24px;
  }
  input[type="range"]::-webkit-slider-thumb {
    width: 28px;
    height: 28px;
  }
  .ascan-scale-row {
    grid-template-columns: auto minmax(80px, 1fr) auto;
    gap: 6px;
  }

  .mobile-advanced-tools {
    margin-top: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: rgba(0,212,255,.04);
  }
  .mobile-advanced-tools > summary {
    display: flex;
    min-height: 46px;
    align-items: center;
    padding: 10px 12px;
    color: var(--accent);
    cursor: pointer;
    font: 800 14px/1.2 var(--ui-font);
  }
  .mobile-advanced-tools-body {
    padding: 0 10px 10px;
  }
  .scan-tool-row {
    align-items: stretch;
    flex-wrap: wrap;
  }
  .scan-tool-row > span {
    display: flex;
    min-height: 44px;
    align-items: center;
    font-size: 12px;
  }
  .scan-tool-row input[type="range"] {
    min-width: 120px;
  }

  .mobile-sticky-actions,
  .draw-toolbar,
  .arena-duel-reply-actions {
    position: sticky;
    bottom: 0;
    z-index: 35;
    margin: 0 -4px;
    padding: 8px 4px calc(8px + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(180deg, transparent, var(--bg) 18%, var(--bg));
  }
  .mobile-sticky-actions .btn,
  .mobile-sticky-actions .defect-btn {
    margin-bottom: 0;
  }

  .challenge-actions {
    grid-template-columns: 1fr 1fr;
  }
  .challenge-actions #challengeEndBtn {
    grid-column: 1 / -1;
  }
  .challenge-specimen-wrap {
    width: 100%;
    height: 170px;
  }
  .defect-actions {
    grid-template-columns: minmax(0,1fr) 112px;
  }

  .sizing-row {
    gap: 8px;
    padding: 9px 10px;
    font-size: 14px;
  }
  .sizing-row > span:last-child {
    font-size: 12px !important;
  }

  .arena-score-matrix::before {
    content: 'Deslize horizontalmente para ver toda a tabela';
    display: block;
    position: sticky;
    left: 0;
    padding: 8px 10px;
    color: var(--text);
    font: 700 12px/1.35 var(--ui-font);
  }

  #auth-screen,
  #account-screen,
  #blocked-screen {
    min-height: 100dvh;
    overflow-y: auto;
    scroll-padding-bottom: 40vh;
  }
  .auth-right,
  .account-right {
    overflow: visible;
  }
  .auth-field input,
  .auth-field select,
  .auth-field textarea,
  .blocked-voucher-row input {
    min-height: 46px;
    font-size: 16px;
  }
  .auth-forgot-btn,
  .auth-privacy-check button,
  .auth-privacy-links button,
  .blocked-privacy-btn {
    min-height: 44px;
    padding: 8px 4px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  /* Mais respiro lateral; conteúdo não fica colado nas bordas */
  .tab-page { padding: 16px 24px 12px; }

  /* Header ganha mais ar */
  .app-header { padding-left: 24px; padding-right: 24px; }

  /* Canvases um pouco maiores */
  #canvasAScan, #challengeCanvasAScan { height: 170px !important; }
  .specimen-wrap { height: 220px; }

  /* Métricas em 4 colunas em vez de 2 */
  .metrics-grid { grid-template-columns: repeat(4, 1fr); }

  /* Painéis um pouco mais espaçados */
  .panel { margin-bottom: 16px; }

  /* Fonte ligeiramente maior nos painéis */
  .panel-title { font-size: 13px; }
  .ctrl-label  { font-size: 12px; }
  .sizing-row  { font-size: 14px; }

  /* Tabs maiores */
  .tab-btn { font-size: 12px; }
  .tab-icon { font-size: 22px; }

  /* Grid de geometrias com mais cards por linha */
  .weld-grid { grid-template-columns: repeat(3, 1fr) !important; }
}

/* ----- DESKTOP: 1024px+ ----- */
@media (min-width: 1024px) {
  /* Conteúdo centralizado com largura máxima — evita esticar até as
     bordas em monitor 4K, o que prejudica leitura */
  .tab-page {
    padding: 24px 32px;
    max-width: 1200px;
    margin: 0 auto;
  }

  /* Header também tem largura interna limitada */
  .app-header {
    padding-left: 32px; padding-right: 32px;
  }
  .app-header > * { max-width: 1200px; }

  /* Canvases bem maiores em desktop */
  #canvasAScan, #challengeCanvasAScan { height: 221px !important; }
  .specimen-wrap { height: 280px; }

  /* Painel de métricas em 4 colunas */
  .metrics-grid { grid-template-columns: repeat(4, 1fr); }

  /* Painéis: espaçamento de leitura em desktop */
  .panel { margin-bottom: 16px; }

  /* Fontes maiores e mais legíveis */
  .panel-title { font-size: 14px; }
  .ctrl-label  { font-size: 13px; }
  .sizing-row  { font-size: 14px; }

  /* Tabs ainda maiores */
  .tab-btn { font-size: 12px; padding: 10px 6px; }
  .tab-icon { font-size: 24px; }

  /* Tab bar centralizada também */
  .tab-bar {
    /* manter fixa no fundo, mas botões dentro de container */
    justify-content: center;
  }
  .tab-btn { max-width: 200px; }

  /* Grid de geometrias com 4 cards por linha em desktop */
  .weld-grid { grid-template-columns: repeat(4, 1fr) !important; }
  #page-weld .weld-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  #page-weld .piece-summary {
    grid-template-columns: minmax(0, 1fr);
    top: 0;
  }

  /* Sliders com track maior, mais fácil de clicar com mouse */
  input[type="range"] { height: 6px; }

  /* Tooltip on-hover de verdade (mobile não tem hover) */
  .tip-btn:hover {
    background: rgba(0, 212, 255, 0.25);
    color: var(--accent2);
  }

  /* Botão Iniciar/Resetar não ocupa a tela inteira */
  .btn-grid {
    grid-template-columns: 240px 240px !important;
    justify-content: center;
    gap: 16px;
  }

  /* Grid de painéis curtos lado a lado via classe utilitária. */
  .panel-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .panel-row > .panel { margin-bottom: 0; }

  /* Modal de tooltip mais largo em desktop */
  .tip-modal-content {
    max-width: 560px !important;
    padding: 24px !important;
  }

  /* ── SPLIT-PANEL: Scan (2/3) + painel lateral (1/3) ── */
  .content-area {
    display: flex;
    overflow: hidden;
  }

  /* Painel esquerdo — Scan, sempre visível */
  #page-scan {
    order: 0;
    display: block !important;
    flex: 0 0 66.666%;
    overflow-y: auto;
    height: 100%;
    max-width: none;
    margin: 0;
    padding: 16px 20px;
    border-right: 1px solid var(--border);
  }

  .content-area.challenge-mode #page-scan {
    display: none !important;
  }

  .content-area.challenge-mode #page-challenge {
    order: 0;
    display: block !important;
    flex: 0 0 66.666%;
    overflow-y: auto;
    height: 100%;
    max-width: none;
    margin: 0;
    padding: 16px 20px;
    border-right: 1px solid var(--border);
  }

  /* Painel direito — aba secundária selecionada */
  .tab-page:not(#page-scan):not(#page-challenge) {
    order: 1;
    flex: 0 0 33.333%;
    overflow-y: auto;
    height: 100%;
    max-width: none;
    margin: 0;
    padding: 16px;
    display: none;
  }
  .tab-page:not(#page-scan):not(#page-challenge).active {
    display: block;
  }

  .content-area.instructor-mode #page-scan {
    display: none !important;
  }
  .content-area.instructor-mode #page-instructor {
    order: 0;
    flex: 1 1 100%;
    width: 100%;
    min-width:0;
    max-width: 1800px;
    box-sizing:border-box;
    margin: 0 auto;
    padding:clamp(16px, 2vw, 36px);
    border-right: 0;
    container-name:instructor-page;
    container-type:inline-size;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #page-instructor {
    display:grid;
    align-content:start;
    grid-template-columns:minmax(0, 1fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #page-instructor > .instructor-panel {
    width:100%;
    min-width:0;
    padding:clamp(18px, 1.8vw, 28px);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-hero-panel {
    border-color:rgba(0,210,255,0.26);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-hero-panel .arena-hero-head {
    align-items:center;
    display:grid;
    grid-template-columns:minmax(0, 1fr) auto;
    gap:24px;
    margin-bottom:18px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-hero-panel .panel-title {
    font-size:clamp(16px, 1.4vw, 21px);
    letter-spacing:2px;
    line-height:1.25;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-hero-panel .arena-hero-summary {
    max-width:760px;
    font-size:13px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorRefreshBtn {
    width:auto;
    min-width:132px;
    min-height:44px;
    padding:10px 20px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-tabs {
    grid-template-columns:repeat(4, minmax(0, 1fr));
    gap:8px;
    margin:0 0 20px;
    padding:5px;
    border:1px solid rgba(0,210,255,0.18);
    border-radius:9px;
    background:rgba(0,0,0,0.18);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-tab {
    min-width:0;
    min-height:42px;
    padding:8px;
    border-color:transparent;
    font-size:11px;
    letter-spacing:.8px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-overview-layout {
    display:grid;
    grid-template-columns:minmax(0, 1fr);
    gap:20px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-overview-section {
    min-width:0;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-overview-heading {
    margin-bottom:10px;
    color:var(--text);
    font-family:monospace;
    font-size:11px;
    font-weight:800;
    letter-spacing:1.8px;
    text-transform:uppercase;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-metric-grid {
    grid-template-columns:repeat(auto-fit, minmax(min(160px, 100%), 1fr));
    gap:10px;
    margin:0;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-metric-card {
    min-width:0;
    min-height:112px;
    padding:15px;
    display:flex;
    flex-direction:column;
    justify-content:center;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-metric-card strong {
    font-size:clamp(25px, 2.2vw, 34px);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-metric-card span,
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-metric-card small {
    overflow-wrap:anywhere;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-module-grid {
    grid-template-columns:repeat(auto-fit, minmax(min(220px, 100%), 1fr));
    gap:10px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-module-card {
    min-width:0;
    min-height:98px;
    padding:16px;
    display:grid;
    align-content:center;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-module-card strong {
    margin:0 0 6px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-module-card small {
    max-width:36ch;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-form-grid {
    grid-template-columns:minmax(280px, 1fr) auto;
    max-width:760px;
    gap:12px;
    margin-bottom:18px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-create {
    display:grid;
    grid-template-columns:minmax(280px, 520px) auto;
    gap:10px;
    align-items:end;
    margin-bottom:18px;
    padding-bottom:18px;
    border-bottom:1px solid rgba(0,210,255,0.14);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-create .auth-field {
    margin:0;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-two-col {
    grid-template-columns:minmax(320px, .85fr) minmax(440px, 1.45fr);
    gap:20px;
    align-items:start;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-two-col > div {
    min-width:0;
    padding:16px;
    border:1px solid rgba(0,210,255,0.18);
    border-radius:8px;
    background:rgba(0,0,0,0.16);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-classes-workspace {
    grid-template-columns:minmax(280px, .6fr) minmax(0, 1.4fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-list-column {
    position:sticky;
    top:0;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-list-column,
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-detail {
    padding:18px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList {
    display:grid;
    gap:10px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList .arena-challenge-card {
    padding:12px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList .arena-challenge-meta {
    display:flex;
    flex-wrap:wrap;
    gap:6px 14px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList .arena-card-actions {
    display:grid;
    grid-template-columns:repeat(2, minmax(0, 1fr));
    gap:7px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList .arena-card-actions .axis-btn {
    width:100%;
    min-width:0;
    padding:7px 8px;
    font-size:10px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList .arena-card-actions .arena-danger-btn {
    grid-column:1 / -1;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-detail {
    display:grid;
    grid-template-columns:minmax(0, 1.2fr) minmax(280px, .8fr);
    gap:16px;
    align-items:start;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-selection {
    grid-column:1 / -1;
    padding-bottom:14px;
    border-bottom:1px solid rgba(0,210,255,0.14);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-members-column,
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-students-column {
    min-width:0;
    padding:0;
    border:0;
    background:transparent;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-students-column {
    padding-left:16px;
    border-left:1px solid rgba(0,210,255,0.14);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-selected-class-card {
    grid-template-columns:minmax(0, 1fr) auto auto;
    align-items:center;
    gap:8px 18px;
    margin:0;
    padding:10px 12px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-selected-class-card strong {
    font-size:13px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-selected-class-card small {
    text-align:right;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorStudentPicker {
    max-height:420px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList,
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassMemberList,
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorExerciseList,
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorAssignmentList {
    max-height:52vh;
    overflow:auto;
    padding-right:4px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorExercisesPanel .instructor-two-col {
    grid-template-columns:minmax(440px, 1.15fr) minmax(380px, .85fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-filter-grid {
    grid-template-columns:minmax(320px, 2fr) minmax(180px, .8fr) minmax(220px, 1fr);
    gap:12px;
    margin-bottom:18px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-assign-row {
    grid-template-columns:minmax(0, 1fr) minmax(0, 1fr) auto;
    gap:10px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-filters {
    grid-template-columns:repeat(4, minmax(0, 1fr));
    gap:10px;
    margin-bottom:10px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-toolbar {
    padding:14px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-actions {
    justify-content:flex-start;
    margin:0;
    padding-top:10px;
    border-top:1px solid rgba(0,210,255,0.12);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-actions .axis-btn {
    min-height:36px;
    padding:7px 12px;
    font-size:10px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-result-summary {
    gap:12px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-result-summary span {
    padding:14px 16px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-table {
    min-width:1100px;
    font-size:13px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-table th,
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-table td {
    padding:12px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorResultsPanel > .arena-panel-head {
    margin-bottom:16px;
  }
  .content-area.instructor-mode.instructor-authoring-mode #page-scan {
    display: block !important;
    order: 0;
    flex: 0 0 66.666%;
    max-width: none;
    height: 100%;
    margin: 0;
    padding: 16px 20px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
  }
  .content-area.instructor-mode.instructor-authoring-mode #page-instructor {
    order: 1;
    flex: 0 0 33.333%;
    max-width: none;
    height: 100%;
    margin: 0;
    padding: 16px;
    overflow-y: auto;
  }
  .content-area.instructor-mode.instructor-authoring-mode #page-instructor > .instructor-hero-panel,
  .content-area.instructor-mode.instructor-authoring-mode #instructorExercisesPanel > .arena-panel-head,
  .content-area.instructor-mode.instructor-authoring-mode #instructorExercisesPanel > .instructor-filter-grid,
  .content-area.instructor-mode.instructor-authoring-mode #instructorExercisesPanel > .instructor-two-col {
    display:none !important;
  }
  .content-area.instructor-mode.instructor-authoring-mode #instructorExercisesPanel {
    padding:0;
    border:0;
    background:transparent;
    box-shadow:none;
  }
  .content-area.instructor-mode.instructor-authoring-mode .instructor-author-panel {
    margin-top:0;
    padding-top:0;
    border-top:0;
  }
  .content-area.instructor-mode.instructor-authoring-mode .instructor-author-steps {
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
  .content-area.instructor-mode.instructor-authoring-mode .instructor-author-data,
  .content-area.instructor-mode.instructor-authoring-mode .instructor-builder-grid,
  .content-area.instructor-mode.instructor-authoring-mode .instructor-form-grid {
    grid-template-columns:minmax(0, 1fr);
  }
  .content-area.instructor-mode.instructor-authoring-mode .instructor-author-block-head {
    align-items:stretch;
    flex-direction:column;
  }
}

@media (min-width: 1024px) and (max-width: 1279px) {
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-detail {
    grid-template-columns:minmax(0, 1fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-filters {
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

@container instructor-page (min-width: 1050px) {
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-overview-layout {
    grid-template-columns:minmax(0, 2fr) minmax(280px, .75fr);
    align-items:start;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-metric-grid {
    grid-template-columns:repeat(3, minmax(0, 1fr));
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-quick-actions .instructor-module-grid {
    grid-template-columns:minmax(0, 1fr);
  }
}

@container instructor-page (max-width: 700px) {
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-hero-panel .arena-hero-head {
    gap:14px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-hero-panel .arena-hero-summary {
    max-width:42ch;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorRefreshBtn {
    min-width:112px;
    padding-inline:14px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-tab {
    font-size:10px;
    letter-spacing:.3px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-create,
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-results-filters {
    grid-template-columns:minmax(0, 1fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-create #instructorCreateClassBtn {
    width:auto;
    min-width:160px;
    justify-self:start;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-list-column {
    position:static;
  }
}

@container instructor-page (max-width: 1050px) {
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-classes-workspace {
    grid-template-columns:minmax(0, 1fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-list-column {
    position:static;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) #instructorClassList {
    grid-template-columns:repeat(auto-fit, minmax(min(260px, 100%), 1fr));
    max-height:none;
    overflow:visible;
  }
}

@container instructor-page (max-width: 760px) {
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-detail {
    grid-template-columns:minmax(0, 1fr);
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-selection {
    grid-column:1;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-class-students-column {
    padding:16px 0 0;
    border-top:1px solid rgba(0,210,255,0.14);
    border-left:0;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-selected-class-card {
    grid-template-columns:minmax(0, 1fr);
    gap:4px;
  }
  .content-area.instructor-mode:not(.instructor-authoring-mode) .instructor-selected-class-card small {
    text-align:left;
  }
}

/* ===== AUTH SCREEN ===== */
/* Paleta própria — independente do tema dark do app */
#auth-screen {
  --auth-blue:    #1B5FBB;
  --auth-navy:    #2E3F54;
  --auth-border:  #d0dae6;
  --auth-bg:      #f4f7fb;
  --auth-text:    #2E3F54;
  --auth-muted:   #6b7f96;
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  background: #ffffff;
}
#auth-screen.hidden { display: none; }

/* Lado esquerdo — logo */
.auth-left {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px;
  background: #ffffff;
}
.auth-brand-logo {
  width: 100%;
  max-width: 400px;
  height: auto;
  object-fit: contain;
}

.auth-social-links {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.auth-social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 12px;
  border-radius: 6px;
  color: #2E3F54;
  font-family: monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .5px;
  text-decoration: none;
  transition: transform .2s, color .2s, background .2s;
}
.auth-social-link:hover,
.auth-social-link:focus-visible {
  transform: translateY(-1px);
  background: #f4f7fb;
}
.auth-social-icon {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  fill: currentColor;
}
.auth-social-link.youtube {
  color: #ff0033;
}
.auth-social-link.instagram {
  color: #c13584;
}
.auth-social-link.email {
  color: #1B5FBB;
}
.auth-social-link span {
  color: #2E3F54;
}

/* Divisor vertical */
.auth-divider {
  width: 1px;
  flex-shrink: 0;
  background: linear-gradient(180deg, transparent 5%, #1B5FBB 35%, #2E3F54 65%, transparent 95%);
  opacity: .25;
}

/* Lado direito — formulário */
.auth-right {
  flex: 0 0 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 32px;
  background: #f4f7fb;
  overflow-y: auto;
  gap: 16px;
}

.auth-card {
  background: #ffffff;
  border: 1px solid #d0dae6;
  border-radius: 12px;
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 4px 24px rgba(27,95,187,0.08);
  position: relative;
}
.auth-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(90deg, #1B5FBB, #2E3F54);
}

/* Título dentro do card */
.auth-card-title {
  font-family: 'Rajdhani', 'Segoe UI', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #2E3F54;
  letter-spacing: 1px;
  margin-bottom: 4px;
  text-align: center;
}
.auth-card-sub {
  font-family: var(--ui-font);
  font-size: 12px;
  color: #6b7f96;
  letter-spacing: 2px;
  text-align: center;
  margin-bottom: 24px;
}
.auth-app-version {
  width: max-content;
  max-width: 100%;
  margin: -12px auto 16px;
  padding: 4px 10px;
  border: 1px solid rgba(27,95,187,0.22);
  border-radius: 999px;
  background: #f4f7fb;
  color: #1B5FBB;
  font-size: 12px;
  line-height: 1.2;
}
.auth-app-version + .auth-lang-switch {
  margin-top: 0;
}

.auth-tabs {
  display: flex;
  margin-bottom: 22px;
  border: 1px solid #d0dae6;
  border-radius: 6px;
  overflow: hidden;
  background: #f4f7fb;
}
.auth-tab {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  color: #6b7f96;
  font-family: var(--ui-font);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: all .2s;
}
.auth-tab.active {
  background: #ffffff;
  color: #1B5FBB;
  box-shadow: 0 1px 4px rgba(27,95,187,0.12);
}

.auth-field { margin-bottom: 16px; }
.auth-field label {
  display: block;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #6b7f96;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.auth-field input {
  width: 100%;
  background: #f4f7fb;
  border: 1px solid #d0dae6;
  color: #2E3F54;
  padding: 11px 14px;
  font-family: var(--ui-font);
  font-size: 14px;
  border-radius: 6px;
  transition: border-color .2s, box-shadow .2s;
}
.auth-notice {
  width: 100%;
  max-width: 360px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: #fff8e6;
  border: 1px solid #f0c46a;
  border-left: 5px solid #d9820f;
  border-radius: 8px;
  color: #2E3F54;
  font-family: var(--ui-font);
  line-height: 1.45;
  text-align: left;
  box-shadow: 0 8px 22px rgba(46,63,84,0.12);
}
.auth-notice-icon {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  margin-top: 1px;
  border-radius: 50%;
  background: #d9820f;
  color: #ffffff;
  font-family: 'Rajdhani', 'Segoe UI', sans-serif;
  font-size: 18px;
  font-weight: 800;
}
.auth-notice-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.auth-notice-body span {
  font-size: 13px;
}
.auth-notice a {
  color: #1B5FBB;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.auth-notice a:hover { color: #2E3F54; }
.auth-notice strong {
  color: #2E3F54;
  font-family: var(--ui-font);
  font-size: 12px;
  letter-spacing: 1px;
}
.auth-notice-cta {
  display: inline-block;
  margin: 0 2px;
  padding: 2px 7px;
  border-radius: 4px;
  background: #1B5FBB;
  color: #ffffff !important;
  line-height: 1.35;
  text-decoration: none !important;
}
.auth-notice-cta:hover { background: #2E3F54; }
.auth-notice-privacy {
  color: #6b7f96;
  font-size: 12px !important;
}

.auth-forgot-row {
  text-align: right;
  margin-top: -8px;
  margin-bottom: 16px;
}
.auth-forgot-btn {
  background: none;
  border: none;
  color: #1B5FBB;
  font-size: 12px;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.auth-forgot-btn:hover { color: #2E3F54; }

.auth-field input::placeholder { color: #a8b8c8; }
.auth-field input:focus {
  border-color: #1B5FBB;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(27,95,187,0.12);
}
.auth-optional {
  font-weight: 400;
  opacity: .65;
  letter-spacing: 0;
  text-transform: lowercase;
}

.auth-privacy-check {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 2px 0 16px;
  color: #4a6080;
  font-family: var(--ui-font);
  font-size: 12px;
  line-height: 1.5;
}
.auth-privacy-check input {
  width: 16px;
  height: 16px;
  margin-top: 1px;
  accent-color: #1B5FBB;
  flex: 0 0 auto;
}
.auth-privacy-check button,
.auth-privacy-links button {
  background: none;
  border: none;
  color: #1B5FBB;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.auth-privacy-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  color: #6b7f96;
  font-family: var(--ui-font);
  font-size: 12px;
}
.auth-privacy-links a {
  color: #1B5FBB;
  font-weight: 700;
  text-decoration: none;
}
.auth-privacy-links a:hover,
.auth-privacy-check button:hover,
.auth-privacy-links button:hover { color: #2E3F54; }

body.privacy-open { overflow: hidden; }
.privacy-modal[hidden] { display: none; }
.privacy-modal {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: grid;
  place-items: center;
  padding: 22px;
}
.privacy-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 10, 15, .64);
}
.privacy-dialog {
  position: relative;
  width: min(760px, 100%);
  max-height: min(82vh, 760px);
  overflow-y: auto;
  background: #ffffff;
  border: 1px solid #d0dae6;
  border-radius: 8px;
  box-shadow: 0 20px 70px rgba(0,0,0,.28);
  padding: 30px;
  color: #2E3F54;
  line-height: 1.62;
}
.privacy-kicker {
  color: #1B5FBB;
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.2px;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.privacy-dialog h2 {
  margin: 0 34px 12px 0;
  font-family: 'Rajdhani', 'Segoe UI', sans-serif;
  font-size: 24px;
  color: #2E3F54;
  letter-spacing: 0;
}
.privacy-dialog h3 {
  margin: 18px 0 6px;
  font-size: 14px;
  color: #1B5FBB;
  letter-spacing: 0;
}
.privacy-dialog p {
  margin: 0 0 10px;
  font-size: 14px;
}
.privacy-dialog a { color: #1B5FBB; font-weight: 700; }
.privacy-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 44px;
  height: 44px;
  border: 1px solid #d0dae6;
  border-radius: 6px;
  background: #f4f7fb;
  color: #2E3F54;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.privacy-close:hover { border-color: #1B5FBB; color: #1B5FBB; }

.blocked-privacy-btn,
.blocked-privacy-link {
  display: block;
  margin: 8px auto 0;
  color: #1B5FBB;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: monospace;
  font-size: 12px;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.blocked-privacy-link { text-decoration: none; }

@media (max-width: 700px) {
  .privacy-modal { padding: 12px; }
  .privacy-dialog { max-height: 88vh; padding: 24px 18px; }
  .privacy-dialog h2 { font-size: 20px; }
}

/* Botão submit dentro do auth */
#authSubmitBtn {
  background: linear-gradient(135deg, #1B5FBB, #2E3F54);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-family: var(--ui-font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 13px;
  width: 100%;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
  margin-bottom: 0;
  min-height: 46px;
}
#authSubmitBtn:hover   { opacity: .9; }
#authSubmitBtn:active  { transform: scale(.98); }
#authSubmitBtn:disabled { opacity: .55; cursor: not-allowed; }

.auth-error {
  background: #fff0f2;
  border: 1px solid #f5c2c9;
  border-radius: 6px;
  padding: 9px 12px;
  font-family: var(--ui-font);
  font-size: 12px;
  color: #c0293e;
  margin-bottom: 14px;
  line-height: 1.5;
}
.auth-success {
  background: #f0faf4;
  border: 1px solid #b2dfc4;
  border-radius: 6px;
  padding: 9px 12px;
  font-family: var(--ui-font);
  font-size: 12px;
  color: #1a7a45;
  margin-bottom: 14px;
  line-height: 1.5;
}

/* Spinner */
.auth-spinner {
  width: 32px; height: 32px;
  border: 3px solid #d0dae6;
  border-top-color: #1B5FBB;
  border-radius: 50%;
  margin: 0 auto;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Mobile: coluna */
@media (max-width: 700px) {
  #auth-screen { flex-direction: column; }
  .auth-left {
    flex: 0 0 auto;
    padding: 28px 40px 20px;
    background: #ffffff;
  }
  .auth-brand-logo { max-width: 240px; }
  .auth-divider {
    width: auto; height: 1px;
    background: linear-gradient(90deg, transparent 5%, #1B5FBB 35%, #2E3F54 65%, transparent 95%);
  }
  .auth-right {
    flex: 1;
    padding: 20px 16px 28px;
    justify-content: flex-start;
    padding-top: 24px;
  }
}

/* ===== ACCOUNT SCREEN ===== */
#account-screen {
  --auth-blue:    #1B5FBB;
  --auth-navy:    #2E3F54;
  --auth-border:  #d0dae6;
  --auth-bg:      #f4f7fb;
  --auth-text:    #2E3F54;
  --auth-muted:   #6b7f96;
  position: fixed;
  inset: 0;
  z-index: 520;
  display: flex;
  background: #ffffff;
}
#account-screen.hidden { display: none; }

.account-right { flex-basis: 480px; }
.account-card {
  max-width: 390px;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}

.account-close-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 44px;
  height: 44px;
  border: 1px solid #d0dae6;
  border-radius: 6px;
  background: #f4f7fb;
  color: #2E3F54;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.account-close-btn:hover { border-color: #1B5FBB; color: #1B5FBB; }

.auth-field input[readonly] {
  color: #6b7f96;
  background: #eef3f8;
  cursor: default;
}

.account-primary-btn {
  background: linear-gradient(135deg, #1B5FBB, #2E3F54);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-family: var(--ui-font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 13px;
  width: 100%;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
  min-height: 46px;
}
.account-primary-btn:hover { opacity: .9; }
.account-primary-btn:active { transform: scale(.98); }
.account-primary-btn:disabled,
.account-secondary-btn:disabled,
.account-danger-btn:disabled { opacity: .55; cursor: not-allowed; }

.account-actions {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #d0dae6;
}
.account-secondary-btn {
  width: 100%;
  min-height: 42px;
  background: #f0f5ff;
  border: 1px solid #c5d5f0;
  border-radius: 6px;
  color: #1B5FBB;
  cursor: pointer;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
}
.account-secondary-btn:hover { background: #ffffff; border-color: #1B5FBB; }

.account-danger-zone {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid #f5c2c9;
  border-radius: 6px;
  background: #fff7f8;
}
.account-danger-title {
  color: #c0293e;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.account-danger-zone p {
  margin: 0 0 10px;
  color: #6b4f58;
  font-family: var(--ui-font);
  font-size: 12px;
  line-height: 1.5;
}
.account-danger-zone input {
  width: 100%;
  background: #ffffff;
  border: 1px solid #f5c2c9;
  color: #2E3F54;
  padding: 10px 12px;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  border-radius: 6px;
  outline: none;
  text-transform: uppercase;
}
.account-danger-zone input:focus {
  border-color: #c0293e;
  box-shadow: 0 0 0 3px rgba(192,41,62,0.12);
}
.account-danger-btn {
  width: 100%;
  min-height: 42px;
  margin-top: 10px;
  background: #c0293e;
  border: none;
  border-radius: 6px;
  color: #ffffff;
  cursor: pointer;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
}
.account-danger-btn:hover { opacity: .9; }

@media (max-width: 700px) {
  #account-screen { flex-direction: column; }
  .account-left {
    flex: 0 0 auto;
    padding: 28px 40px 20px;
  }
  .account-right {
    flex: 1;
    padding: 20px 16px 28px;
    justify-content: flex-start;
    padding-top: 24px;
  }
  .account-card { max-height: none; }
}

/* ===== TELA DE ACESSO BLOQUEADO ===== */
#blocked-screen {
  position: fixed;
  inset: 0;
  z-index: 490;
  background: #f4f7fb;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.blocked-card {
  background: #ffffff;
  border: 1px solid #d0dae6;
  border-radius: 12px;
  padding: 36px 28px 28px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 4px 24px rgba(27,95,187,0.08);
  text-align: center;
  position: relative;
}
.blocked-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(90deg, #1B5FBB, #2E3F54);
}

.blocked-logo {
  width: 180px;
  height: auto;
  margin-bottom: 20px;
}

.blocked-title {
  font-family: 'Rajdhani', 'Segoe UI', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #2E3F54;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.blocked-msg {
  font-family: var(--ui-font);
  font-size: 12px;
  color: #6b7f96;
  line-height: 1.7;
  margin-bottom: 20px;
}

.btn-blocked-contact {
  display: inline-block;
  background: linear-gradient(135deg, #1B5FBB, #2E3F54);
  color: #ffffff;
  text-decoration: none;
  padding: 11px 24px;
  border-radius: 6px;
  font-family: var(--ui-font);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  transition: opacity .2s;
  margin-bottom: 18px;
}
.btn-blocked-contact:hover { opacity: .88; }

.blocked-sep {
  font-family: var(--ui-font);
  font-size: 12px;
  color: #a8b8c8;
  margin-bottom: 16px;
}

.blocked-voucher-label {
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #6b7f96;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.blocked-voucher-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.blocked-voucher-row input {
  flex: 1;
  background: #f4f7fb;
  border: 1px solid #d0dae6;
  color: #2E3F54;
  padding: 10px 12px;
  font-family: var(--ui-font);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  border-radius: 6px;
  outline: none;
  transition: border-color .2s;
}
.blocked-voucher-row input:focus { border-color: #1B5FBB; box-shadow: 0 0 0 3px rgba(27,95,187,0.12); }
.blocked-voucher-row button {
  background: #1B5FBB;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 10px 16px;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: opacity .2s;
  white-space: nowrap;
}
.blocked-voucher-row button:hover { opacity: .88; }

#blockedMsg {
  font-family: var(--ui-font);
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  margin-bottom: 12px;
  line-height: 1.5;
}
#blockedMsg.auth-error   { background:#fff0f2; border:1px solid #f5c2c9; color:#c0293e; }
#blockedMsg.auth-success { background:#f0faf4; border:1px solid #b2dfc4; color:#1a7a45; }

.btn-blocked-logout {
  background: transparent;
  border: none;
  color: #a8b8c8;
  font-family: var(--ui-font);
  font-size: 12px;
  cursor: pointer;
  margin-top: 4px;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.btn-blocked-logout:hover { color: #6b7f96; }

/* Botão logout no header */
.account-btn,
.logout-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  padding: 4px 10px;
  font-family: var(--ui-font);
  font-size: 12px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .2s;
  flex-shrink: 0;
  white-space: nowrap;
}
.account-btn:hover { border-color: #1B5FBB; color: #1B5FBB; }
.logout-btn:hover { border-color: var(--warn); color: var(--warn); }

@media (max-width: 520px) {
  .logo-row {
    gap: 6px;
  }
  .header-logo-img {
    max-width: 132px;
  }
  .header-app-version {
    padding: 2px 6px;
    font-size: 12px;
    letter-spacing: .5px;
  }
  .user-rank-pill {
    padding: 3px 7px;
    gap: 4px;
  }
  .user-rank-pill span {
    display: none;
  }
  .user-rank-pill strong {
    font-size: 12px;
  }
  .account-btn,
  .logout-btn {
    padding: 4px 7px;
    font-size: 12px;
  }
}

/* ----- DESKTOP GRANDE: 1440px+ ----- */
@media (min-width: 1440px) {
  /* Em telas muito grandes, aumentar um pouco o max-width */
  .tab-page { max-width: 1320px; }
  .app-header > * { max-width: 1320px; }

  /* Canvas A-Scan ainda maior */
  #canvasAScan, #challengeCanvasAScan { height: 255px !important; }
  .specimen-wrap { height: 320px; }
}


/* ===== LANGUAGE SWITCH ===== */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid #d0dae6;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
}
.auth-lang-switch {
  justify-content: center;
  margin: 10px auto 14px;
  width: max-content;
}
.lang-btn {
  width: 30px;
  height: 26px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: .56;
  transition: opacity .2s, background .2s, transform .2s;
}
.lang-btn:hover { opacity: .9; transform: translateY(-1px); }
.flag-circle {
  position: relative;
  display: block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(46,63,84,0.22);
}
.flag-br {
  background: #009b3a;
}
.flag-br::before {
  content: "";
  position: absolute;
  inset: 5px 3px;
  background: #ffdf00;
  transform: rotate(45deg);
}
.flag-br::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #002776;
}
.flag-england {
  background:
    linear-gradient(32deg, transparent 0 38%, #ffffff 38% 45%, #ce1124 45% 55%, #ffffff 55% 62%, transparent 62% 100%),
    linear-gradient(148deg, transparent 0 38%, #ffffff 38% 45%, #ce1124 45% 55%, #ffffff 55% 62%, transparent 62% 100%),
    linear-gradient(90deg, transparent 0 36%, #ffffff 36% 44%, #ce1124 44% 56%, #ffffff 56% 64%, transparent 64% 100%),
    linear-gradient(0deg, transparent 0 36%, #ffffff 36% 44%, #ce1124 44% 56%, #ffffff 56% 64%, transparent 64% 100%),
    #012169;
}
.lang-btn.active {
  opacity: 1;
  background: rgba(27,95,187,0.12);
  box-shadow: inset 0 0 0 1px rgba(27,95,187,0.32);
}
.header-lang-switch { flex-shrink: 0; }
@media (max-width: 420px) {
  .header-lang-switch .lang-btn { width: 26px; height: 24px; font-size: 15px; }
}

/* ===== ACCESS REQUEST PAGE ===== */
.access-page {
  min-height: 100vh;
  background: #ffffff;
  color: #2E3F54;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

#access-screen {
  --auth-blue:    #1B5FBB;
  --auth-navy:    #2E3F54;
  --auth-border:  #d0dae6;
  --auth-bg:      #f4f7fb;
  --auth-text:    #2E3F54;
  --auth-muted:   #6b7f96;
  min-height: 100vh;
  display: flex;
  background: #ffffff;
}

.access-left {
  flex: 0 0 38%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  background: #ffffff;
}

.access-logo-link {
  display: block;
  width: min(400px, 100%);
}

.access-right {
  flex: 1;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 32px;
  background: #f4f7fb;
  overflow-y: auto;
}

.access-card {
  align-self: center;
  width: min(720px, 100%);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  background: #ffffff;
  border: 1px solid #d0dae6;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(27,95,187,0.08);
  padding: 32px 28px;
  position: relative;
}

.access-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(90deg, #1B5FBB, #2E3F54);
}

.access-note {
  padding: 12px 14px;
  margin: 0 0 22px;
  background: #f0f5ff;
  border: 1px solid #c5d5f0;
  border-radius: 6px;
  color: #4a6080;
  font-family: var(--ui-font);
  font-size: 12px;
  line-height: 1.7;
  text-align: center;
}

.access-section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 14px;
  color: #1B5FBB;
  font-family: var(--ui-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.access-section-label:first-child { margin-top: 0; }
.access-section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, #d0dae6, transparent);
}

.access-field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.access-page .auth-field select,
.access-page .auth-field textarea {
  width: 100%;
  background: #f4f7fb;
  border: 1px solid #d0dae6;
  color: #2E3F54;
  padding: 11px 14px;
  font-family: var(--ui-font);
  font-size: 14px;
  border-radius: 6px;
  outline: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}

.access-page .auth-field textarea {
  min-height: 96px;
  resize: vertical;
  line-height: 1.5;
}

.access-page .auth-field select:focus,
.access-page .auth-field textarea:focus {
  border-color: #1B5FBB;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(27,95,187,0.12);
}

.auth-required { color: #c0293e; }

.access-profile-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.auth-field .access-profile-question {
  letter-spacing: 0;
  text-transform: none;
}

.access-profile-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-height: 76px;
  padding: 12px 8px;
  border: 1px solid #d0dae6;
  border-radius: 6px;
  background: #f4f7fb;
  color: #6b7f96;
  text-transform: none;
  cursor: pointer;
  transition: border-color .2s, box-shadow .2s, background .2s, color .2s;
}

.access-profile-btn input { position: absolute; opacity: 0; pointer-events: none; }
.access-profile-btn span {
  color: #1B5FBB;
  font-family: var(--ui-font);
  font-size: 12px;
  letter-spacing: 1px;
}
.access-profile-btn strong {
  font-size: 12px;
  letter-spacing: 1px;
}
.access-profile-btn.active {
  background: #ffffff;
  border-color: #1B5FBB;
  color: #2E3F54;
  box-shadow: 0 0 0 3px rgba(27,95,187,0.12);
}

.access-conditional { display: none; }
.access-conditional.visible { display: block; }

.access-field-error {
  display: none;
  margin-top: 6px;
  color: #c0293e;
  font-family: var(--ui-font);
  font-size: 12px;
  line-height: 1.4;
}

.access-page .invalid {
  border-color: #c0293e !important;
  box-shadow: 0 0 0 3px rgba(192,41,62,0.1) !important;
}

.access-check { margin-bottom: 10px; }

#accessSubmitBtn {
  background: linear-gradient(135deg, #1B5FBB, #2E3F54);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-family: var(--ui-font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 13px;
  width: 100%;
  min-height: 46px;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
}
#accessSubmitBtn:hover { opacity: .9; }
#accessSubmitBtn:active { transform: scale(.98); }
#accessSubmitBtn:disabled { opacity: .55; cursor: not-allowed; }

.access-success-panel {
  padding: 20px;
  border: 1px solid #b2dfc4;
  border-radius: 8px;
  background: #f0faf4;
  color: #1a7a45;
  text-align: center;
  font-family: var(--ui-font);
  line-height: 1.7;
}
.access-success-title {
  margin-bottom: 8px;
  color: #2E3F54;
  font-family: 'Rajdhani', 'Segoe UI', sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
}
.access-back-link {
  display: inline-flex;
  margin-top: 14px;
  color: #1B5FBB;
  font-weight: 700;
  text-decoration: none;
}
.access-back-link:hover { text-decoration: underline; }

@media (max-width: 900px) {
  #access-screen { flex-direction: column; }
  .access-left {
    flex: 0 0 auto;
    padding: 28px 40px 20px;
  }
  .access-logo-link { width: min(260px, 100%); }
  .access-right {
    padding: 20px 16px 28px;
    overflow: visible;
  }
  .access-card {
    max-height: none;
    padding: 28px 18px;
  }
}

@media (max-width: 620px) {
  .access-field-row,
  .access-profile-grid {
    grid-template-columns: 1fr;
  }
  .access-profile-btn {
    min-height: 58px;
    flex-direction: row;
  }
}

@media print {
  .app-header,
  .tab-bar,
  #page-scan,
  #page-config,
  #page-defects,
  #page-report,
  #page-weld,
  #page-quiz,
  #page-arena,
  #page-challenge,
  #page-classroom,
  #academySheet,
  #academySheetOverlay,
  #librarySheet,
  #librarySheetOverlay,
  #instructorOverviewPanel,
  #instructorClassesPanel,
  #instructorExercisesPanel,
  .instructor-tabs,
  #instructorRefreshBtn,
  .instructor-results-filters,
  .instructor-results-actions {
    display:none !important;
  }
  .content-area {
    position:static;
    display:block;
    overflow:visible;
  }
  #page-instructor,
  #instructorResultsPanel {
    display:block !important;
    max-width:none !important;
    margin:0 !important;
    padding:0 !important;
    color:#000;
    background:#fff;
  }
  .panel,
  .instructor-results-table-wrap {
    border:0;
    box-shadow:none;
    background:#fff;
  }
  .panel::before {
    display:none;
  }
  .instructor-results-table {
    min-width:0;
    font-size:10px;
  }
  .instructor-results-table th,
  .instructor-results-table td {
    color:#000;
    border-color:#ccc;
  }
}