.interior-navigation {
  position: absolute; z-index: 6; top: 96px; left: 18px;
  display: flex; align-items: flex-start; flex-direction: column; gap: 5px;
  max-width: calc(100% - 36px); pointer-events: none;
}
.interior-navigation[hidden] { display: none; }
.interior-navigation button {
  pointer-events: auto; min-height: 36px; padding: 7px 12px;
  border: 1px solid var(--teal-line); border-radius: 10px;
  background: var(--glass); color: var(--teal-strong);
  font: inherit; font-size: 12px; font-weight: 600; cursor: pointer;
  backdrop-filter: blur(12px);
}
.interior-navigation button:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }
.interior-navigation button:active { transform: scale(.98); }
.interior-navigation span:not(:empty) {
  padding: 4px 7px; border-radius: 6px; background: var(--glass);
  color: var(--ink); font-size: 10px;
}
@media (max-width: 640px) {
  .interior-navigation { top: 70px; left: 12px; max-width: calc(100% - 24px); }
  .interior-navigation button { min-height: 40px; }
}

:root {
  color-scheme: light;

  /* Surfaces — same light ramp as css/shared/design-tokens.css */
  --canvas: #f3f4ef;
  --panel: #ffffff;
  --panel-2: #f8f9f5;
  --sunken: #ecede6;

  /* Text — each step holds >= 4.5:1 on both --panel and --canvas */
  --ink: #14181a;
  --muted: #535c57;
  --faint: #5f6963;

  /* Hairlines */
  --line: #e3e6dc;
  --line-strong: #cdd2c6;

  /* Interaction is iris-teal; catchlight amber stays the sparing accent.
     The *-ink variants are the text-safe darkenings of the fill colours. */
  --teal: #1f4b4c;
  --teal-strong: #163938;
  --teal-mid: #2f8a86;
  --teal-soft: #e4eeee;
  --teal-line: #b7cfce;
  --amber: #dc8f2b;
  --amber-ink: #8a4f08;
  --amber-soft: #f7e7cc;
  --coral: #c4523f;
  --coral-ink: #a8402e;
  --coral-soft: #fbe9e4;
  --danger: #b4372f;
  --on-accent: #ffffff;

  /* Frosted chrome that floats over the 3D stage */
  --glass: rgba(255, 255, 255, .86);
  --glass-line: rgba(20, 24, 26, .1);

  /* 3D stage — a cool sage studio backdrop, darker than the ivory sclera so the
     globe separates from it. Also read by eye-3d.js (fog + snapshot backdrop). */
  --stage-center: #e4eae6;
  --stage-mid: #d3dcd8;
  --stage-edge: #b9c6c1;

  --radius: 18px;
  --shadow: 0 1px 2px rgba(20, 24, 26, .04), 0 14px 36px -10px rgba(20, 24, 26, .12);
  --shadow-sm: 0 1px 2px rgba(20, 24, 26, .06);
  --font-ui: "Manrope", sans-serif;
  --font-display: "Fraunces", serif;
  --font-ar: "IBM Plex Sans Arabic", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }
html { background: var(--canvas); scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: radial-gradient(1200px 420px at 50% -6%, #ffffff 0, rgba(255, 255, 255, 0) 72%), var(--canvas); font-family: var(--font-ui); -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button { color: inherit; }
button:focus-visible, a:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }
[hidden] { display: none !important; }
html[dir="rtl"] body, html[dir="rtl"] button { font-family: var(--font-ar); }

.skip-link { position: fixed; z-index: 100; inset-block-start: 12px; inset-inline-start: 12px; transform: translateY(-160%); visibility: hidden; opacity: 0; pointer-events: none; padding: 10px 14px; border-radius: 10px; color: var(--ink); background: var(--amber); font-weight: 700; }
.skip-link:focus-visible { transform: translateY(0); visibility: visible; opacity: 1; pointer-events: auto; }

.lab-header { position: sticky; z-index: 30; top: 0; display: grid; grid-template-columns: auto 1fr auto; align-items: center; min-height: 72px; padding: 0 clamp(18px, 4vw, 64px); border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .88); backdrop-filter: blur(18px) saturate(1.2); }
.lab-brand { display: flex; align-items: center; gap: 11px; color: inherit; text-decoration: none; }
.lab-brand__mark { width: 38px; color: #055a55; }
.lab-brand > span { display: grid; }
.lab-brand strong { font: 600 1.35rem/1 var(--font-display); letter-spacing: .01em; }
.lab-brand small { margin-top: 4px; color: var(--muted); font-size: .68rem; }
.lab-nav { display: flex; justify-content: center; gap: 8px; }
.lab-nav a { position: relative; padding: 10px 13px; border-radius: 9px; color: var(--muted); font-size: .84rem; font-weight: 700; text-decoration: none; }
.lab-nav a:hover { color: var(--ink); background: var(--sunken); }
.lab-nav a.is-active { color: var(--teal); background: var(--teal-soft); }
.lab-nav a.is-active::after { content: ""; position: absolute; inset-inline: 15px; bottom: 3px; height: 2px; border-radius: 2px; background: var(--teal); }
.language-button { display: inline-flex; align-items: center; gap: 8px; min-height: 38px; padding: 0 13px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--panel); cursor: pointer; }
.language-button:hover { border-color: var(--teal); background: var(--teal-soft); }
.language-button svg { width: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.language-button span { font-size: .8rem; font-weight: 700; }

.eye3d-page { width: min(1760px, 100%); margin: 0 auto; padding: clamp(24px, 3vw, 46px) clamp(14px, 2.8vw, 46px) 28px; }
.eye3d-intro { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(340px, .8fr); align-items: end; gap: 40px; margin: 0 auto clamp(22px, 3vw, 38px); max-width: 1500px; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 13px; color: var(--teal); font: 500 .72rem/1 var(--font-mono); letter-spacing: .15em; }
.eyebrow__pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--teal-mid); box-shadow: 0 0 0 0 rgba(47, 138, 134, .5); animation: ping 2s infinite; }
@keyframes ping { 65%,100% { box-shadow: 0 0 0 9px rgba(47, 138, 134, 0); } }
.eye3d-intro h1 { margin: 0; font: 500 clamp(2rem, 4.2vw, 4.65rem)/.98 var(--font-display); letter-spacing: -.035em; }
.intro-copy { max-width: 740px; margin: 17px 0 0; color: var(--muted); font-size: clamp(.9rem, 1.2vw, 1.04rem); line-height: 1.75; }
.intro-metrics { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.intro-metrics div { display: grid; gap: 3px; padding: 16px 18px; border-inline-start: 1px solid var(--line); }
.intro-metrics div:first-child { border-inline-start: 0; }
.intro-metrics strong { color: var(--teal); font: 500 clamp(1.2rem, 2vw, 1.65rem)/1 var(--font-display); }
.intro-metrics span { color: var(--muted); font-size: .7rem; line-height: 1.35; }

.eye3d-workspace { display: grid; grid-template-columns: 270px minmax(460px, 1fr) 315px; min-height: min(770px, calc(100vh - 170px)); max-width: 1660px; margin: 0 auto; border: 1px solid var(--line); border-radius: var(--radius); overflow: clip; background: var(--panel); box-shadow: var(--shadow); }
.lab-panel { min-width: 0; padding: 22px 18px; background: var(--panel); }
.structures-panel { border-inline-end: 1px solid var(--line); }
.motion-panel { border-inline-start: 1px solid var(--line); }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.panel-heading > div { display: flex; align-items: center; gap: 9px; }
.panel-heading h2 { margin: 0; font-size: .95rem; line-height: 1.2; letter-spacing: -.01em; }
.panel-kicker { display: grid; place-items: center; width: 24px; height: 24px; border: 1px solid var(--teal-line); border-radius: 50%; color: var(--teal); background: var(--teal-soft); font: 500 .625rem/1 var(--font-mono); }
.icon-button { display: grid; place-items: center; width: 35px; height: 35px; padding: 0; border: 1px solid var(--line-strong); border-radius: 10px; color: var(--muted); background: var(--panel); box-shadow: var(--shadow-sm); cursor: pointer; transition: .18s ease; }
.icon-button:hover { color: var(--teal); border-color: var(--teal); background: var(--teal-soft); }
.icon-button[aria-pressed="true"] { color: var(--on-accent); border-color: var(--teal); background: var(--teal); }
.icon-button svg { width: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

.layer-switches { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.layer-chip { display: flex; align-items: center; gap: 8px; min-height: 36px; padding: 0 10px; border: 1px solid transparent; border-radius: 9px; color: var(--faint); background: var(--sunken); cursor: pointer; font-size: .74rem; font-weight: 600; text-align: start; transition: .16s ease; }
.layer-chip:hover { color: var(--ink); }
.layer-chip.is-on { color: var(--ink); border-color: var(--line-strong); background: var(--panel); box-shadow: var(--shadow-sm); }
.layer-chip:not(.is-on) .dot { opacity: .3; }
.dot { width: 9px; height: 9px; flex: 0 0 auto; border-radius: 50%; background: currentColor; box-shadow: inset 0 0 0 1px rgba(20, 24, 26, .18); }
.dot--ivory { color: #e9e3d3; }.dot--coral { color: #d9705c; }.dot--gold { color: var(--amber); }.dot--red { color: #b84f49; }
.structure-groups { max-height: calc(min(770px, 100vh - 170px) - 160px); padding-inline-end: 3px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: rgba(31, 75, 76, .3) transparent; }
.structure-group { margin-top: 18px; }
.structure-group h3 { margin: 0 0 8px 5px; color: var(--faint); font: 500 .64rem/1 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.structure-row { display: grid; grid-template-columns: 10px minmax(0,1fr) auto; align-items: center; gap: 9px; width: 100%; min-height: 40px; margin: 2px 0; padding: 0 9px; border: 1px solid transparent; border-radius: 10px; color: var(--muted); background: transparent; cursor: pointer; text-align: start; transition: .15s ease; }
.structure-row:hover { color: var(--ink); background: var(--sunken); }
.structure-row.is-active { color: var(--ink); border-color: var(--teal-line); background: var(--teal-soft); }
.structure-row i { width: 9px; height: 9px; border-radius: 3px; background: var(--swatch); box-shadow: inset 0 0 0 1px rgba(20, 24, 26, .22); }
.structure-row span { min-width: 0; font-size: .76rem; font-weight: 600; }
.structure-row small { color: var(--faint); font: 500 .625rem/1 var(--font-mono); text-transform: uppercase; }

.viewport-card { position: relative; min-width: 0; min-height: 600px; overflow: hidden; background: radial-gradient(ellipse 78% 68% at 50% 44%, var(--stage-center) 0, var(--stage-mid) 55%, var(--stage-edge) 100%); isolation: isolate; }
#eye3dCanvas { position: absolute; z-index: 1; inset: 0; width: 100%; height: 100%; touch-action: none; cursor: grab; }
#eye3dCanvas:active { cursor: grabbing; }
.viewport-atmosphere { position: absolute; z-index: 0; inset: 0; pointer-events: none; background: linear-gradient(rgba(31, 75, 76, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(31, 75, 76, .06) 1px, transparent 1px); background-size: 44px 44px; mask-image: radial-gradient(circle, #000 8%, transparent 74%); }
.viewport-atmosphere::after { content: ""; position: absolute; left: 50%; bottom: 12%; width: 56%; aspect-ratio: 1; transform: translateX(-50%) rotateX(70deg); border: 1px solid rgba(31, 75, 76, .2); border-radius: 50%; box-shadow: inset 0 0 70px rgba(31, 75, 76, .06); }
.viewport-topbar { position: absolute; z-index: 4; inset: 18px 18px auto; display: flex; justify-content: space-between; gap: 12px; pointer-events: none; }
.render-status, .viewport-actions { pointer-events: auto; }
.render-status { display: flex; align-items: center; gap: 8px; min-height: 35px; padding: 0 11px; border: 1px solid var(--glass-line); border-radius: 10px; background: var(--glass); box-shadow: var(--shadow-sm); backdrop-filter: blur(14px) saturate(1.3); }
.render-status i { width: 7px; height: 7px; border-radius: 50%; background: var(--teal-mid); box-shadow: 0 0 0 3px rgba(47, 138, 134, .18); }
.render-status span { color: var(--ink); font: 500 .625rem/1 var(--font-mono); letter-spacing: .09em; }
.render-status small { padding-inline-start: 8px; border-inline-start: 1px solid var(--line-strong); color: var(--faint); font: 500 .625rem/1 var(--font-mono); }
.viewport-actions { display: flex; gap: 7px; }
.viewport-actions .icon-button { background: var(--glass); backdrop-filter: blur(14px) saturate(1.3); }
.viewport-actions .icon-button:hover { background: var(--teal-soft); }
.viewport-actions .icon-button[aria-pressed="true"] { background: var(--teal); }
.orientation-widget { position: absolute; z-index: 3; top: 78px; inset-inline-end: 22px; width: 62px; height: 62px; border: 1px solid var(--glass-line); border-radius: 50%; color: var(--muted); background: var(--glass); box-shadow: var(--shadow-sm); backdrop-filter: blur(14px); font: 600 .625rem/1 var(--font-mono); }
.orientation-widget::before, .orientation-widget::after { content:""; position: absolute; inset: 30px 12px auto; height: 1px; background: linear-gradient(90deg, transparent, currentColor, transparent); opacity: .55; }
.orientation-widget::after { transform: rotate(90deg); }
.orientation-widget i { position: absolute; inset: 24px; width: 12px; height: 12px; border: 1.5px solid var(--teal); border-radius: 50%; }
.axis { position: absolute; }.axis--y { top: 6px; left: 28px; color: var(--teal); }.axis--x { top: 27px; right: 7px; color: var(--coral-ink); }.axis--z { top: 27px; left: 7px; color: var(--amber-ink); }
.selected-label { position: absolute; z-index: 4; top: 72px; inset-inline-start: 18px; display: grid; grid-template-columns: 1fr auto; gap: 3px 14px; min-width: 168px; padding: 10px 10px 10px 13px; border: 1px solid var(--glass-line); border-inline-start: 3px solid var(--amber); border-radius: 10px; background: var(--glass); box-shadow: var(--shadow-sm); backdrop-filter: blur(14px) saturate(1.3); }
.selected-label span { grid-column: 1; color: var(--amber-ink); font: 500 .625rem/1 var(--font-mono); letter-spacing: .12em; }
.selected-label strong { grid-column: 1; font-size: .8rem; }
.selected-label button { grid-column: 2; grid-row: 1 / 3; width: 25px; border: 0; border-radius: 6px; color: var(--muted); background: transparent; cursor: pointer; font-size: 1.15rem; }
.selected-label button:hover { color: var(--ink); background: var(--sunken); }
.view-presets { position: absolute; z-index: 4; left: 50%; bottom: 67px; display: flex; gap: 5px; transform: translateX(-50%); padding: 5px; border: 1px solid var(--glass-line); border-radius: 13px; background: var(--glass); box-shadow: 0 1px 2px rgba(20, 24, 26, .05), 0 10px 26px -8px rgba(20, 24, 26, .18); backdrop-filter: blur(15px) saturate(1.3); }
.view-button { display: flex; align-items: center; gap: 7px; min-height: 34px; padding: 0 11px; border: 0; border-radius: 9px; color: var(--muted); background: transparent; cursor: pointer; font-size: .68rem; font-weight: 700; transition: .15s ease; }
.view-button small { display: grid; place-items: center; width: 18px; height: 18px; border: 1px solid var(--line-strong); border-radius: 5px; color: var(--faint); font: 500 .625rem/1 var(--font-mono); }
.view-button:hover { color: var(--ink); background: var(--sunken); }
.view-button.is-active { color: var(--on-accent); background: var(--teal); }
.view-button.is-active small { color: var(--on-accent); border-color: rgba(255, 255, 255, .45); }
.view-button--reset { min-width: 34px; padding: 0; justify-content: center; border-inline-start: 1px solid var(--line); border-radius: 0 9px 9px 0; }
.view-button svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.gesture-hint { position: absolute; z-index: 4; inset: auto 0 15px; width: max-content; max-width: calc(100% - 28px); margin-inline: auto; display: flex; justify-content: center; gap: clamp(14px, 3vw, 28px); padding: 7px 16px; border: 1px solid var(--glass-line); border-radius: 999px; color: var(--muted); background: var(--glass); backdrop-filter: blur(12px); pointer-events: none; }
.gesture-hint span { display: flex; align-items: center; gap: 5px; font-size: .66rem; }
.gesture-hint svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.gesture-hint b { color: var(--ink); font-weight: 700; }.gesture-hint i { font-style: normal; }

.loading-state { position: absolute; z-index: 10; inset: 0; display: grid; place-content: center; justify-items: center; padding: 30px; background: radial-gradient(circle at 50% 45%, #f4f6f2, var(--stage-mid) 78%); transition: opacity .5s ease, visibility .5s ease; }
.loading-state.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.loading-state strong { margin-top: 22px; font: 500 clamp(1.1rem, 2vw, 1.45rem)/1.2 var(--font-display); }
.loading-state p { margin: 8px 0 16px; color: var(--muted); font-size: .76rem; }
.loading-state p b { color: var(--teal); font-family: var(--font-mono); }
.loading-track { width: min(270px, 68vw); height: 3px; overflow: hidden; border-radius: 3px; background: rgba(20, 24, 26, .12); }
.loading-track i { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--teal); transition: width .2s ease; }
.loading-orbit { position: relative; width: 76px; height: 76px; border: 1px solid rgba(31, 75, 76, .32); border-radius: 50%; animation: turn 3s linear infinite; }
.loading-orbit::before, .loading-orbit::after { content:""; position:absolute; inset: 10px; border: 1px solid rgba(220, 143, 43, .5); border-radius: 50%; transform: rotateX(63deg); }
.loading-orbit::after { transform: rotateY(63deg); }
.loading-orbit span { position: absolute; inset: 27px; border: 1.5px solid var(--teal); border-radius: 50%; background: rgba(31, 75, 76, .1); }
.loading-orbit i { position: absolute; top: 2px; left: 34px; width: 8px; height: 8px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 3px rgba(220, 143, 43, .25); }
@keyframes turn { to { transform: rotate(360deg); } }

.neutral-button { min-height: 30px; padding: 0 11px; border: 1px solid var(--teal-line); border-radius: 8px; color: var(--teal); background: var(--teal-soft); cursor: pointer; font-size: .68rem; font-weight: 700; }
.neutral-button:hover { border-color: var(--teal); }
.control-section { padding: 17px 0; border-top: 1px solid var(--line); }
.control-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.control-title h3 { margin: 0; font-size: .78rem; }
.control-title > span { color: var(--faint); font: 500 .625rem/1 var(--font-mono); letter-spacing: .09em; text-transform: uppercase; }
.gaze-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.gaze-grid button, .segmented-controls button, .dual-controls button { display: grid; place-items: center; gap: 4px; min-height: 65px; padding: 7px 4px; border: 1px solid var(--line-strong); border-radius: 10px; color: var(--muted); background: var(--panel-2); cursor: pointer; transition: transform .15s ease, color .15s ease, border-color .15s ease, background .15s ease, box-shadow .15s ease; }
.gaze-grid button.gaze-center { background: radial-gradient(circle, var(--teal-soft), var(--panel-2)); }
.gaze-grid button:hover, .segmented-controls button:hover, .dual-controls button:hover { color: var(--teal); border-color: var(--teal); background: var(--teal-soft); transform: translateY(-1px); }
.gaze-grid button.is-active, .segmented-controls button.is-active, .dual-controls button.is-active { color: var(--on-accent); border-color: var(--teal); background: var(--teal); box-shadow: 0 6px 14px -6px rgba(31, 75, 76, .55); }
.gaze-grid svg, .dual-controls svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.gaze-grid span, .segmented-controls span, .dual-controls span { font-size: .66rem; font-weight: 700; }
.gaze-center i { width: 16px; height: 16px; border: 4px solid rgba(31, 75, 76, .45); border-radius: 50%; box-shadow: inset 0 0 0 2px #fff; background: var(--teal); }
.gaze-center.is-active i { border-color: rgba(255, 255, 255, .55); box-shadow: inset 0 0 0 2px var(--teal); background: var(--amber); }
.segmented-controls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.segmented-controls button { min-height: 72px; }
.segmented-controls small { color: var(--faint); font: 500 .625rem/1 var(--font-mono); }
.segmented-controls button:hover small { color: var(--teal); }
.segmented-controls button.is-active small { color: rgba(255, 255, 255, .82); }
.pupil-symbol { display: block; border: 4px solid #2a7f86; border-radius: 50%; background: #0b1416; box-shadow: 0 0 0 2px #bfdcdc; }
.segmented-controls button.is-active .pupil-symbol { box-shadow: 0 0 0 2px rgba(255, 255, 255, .88); }
.pupil-symbol--small { width: 11px; height: 11px; border-width: 3px; }.pupil-symbol--medium { width: 16px; height: 16px; }.pupil-symbol--large { width: 21px; height: 21px; border-width: 3px; }
.wide-control { display: flex; align-items: center; gap: 11px; width: 100%; min-height: 52px; margin-top: 7px; padding: 8px 11px; border: 1px solid var(--line-strong); border-radius: 10px; color: var(--muted); background: var(--panel-2); cursor: pointer; text-align: start; transition: .15s ease; }
.wide-control:hover { color: var(--teal); border-color: var(--teal); background: var(--teal-soft); }
.wide-control.is-active { color: var(--on-accent); border-color: var(--teal); background: var(--teal); box-shadow: 0 6px 14px -6px rgba(31, 75, 76, .55); }
.wide-control svg { width: 22px; flex: 0 0 auto; fill: none; stroke: var(--teal); stroke-width: 1.5; }
.wide-control.is-active svg { stroke: var(--on-accent); }
.wide-control span { display: grid; gap: 3px; }.wide-control strong { font-size: .72rem; }.wide-control small { color: var(--faint); font-size: .62rem; }
.wide-control:hover small { color: var(--muted); }
.wide-control.is-active small { color: rgba(255, 255, 255, .82); }
.dual-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.dual-controls button { grid-template-columns: auto 1fr; min-height: 46px; padding: 6px 9px; text-align: start; }
.dual-controls svg { width: 18px; }
.timeline-section { padding-top: 17px; border-top: 1px solid var(--line); }
.timeline-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.timeline-meta label { color: var(--muted); font-size: .68rem; font-weight: 700; }
.timeline-meta output { color: var(--teal); font: 500 .625rem/1 var(--font-mono); }
#motionTimeline { width: 100%; height: 4px; margin: 7px 0; appearance: none; border-radius: 4px; outline: none; background: linear-gradient(90deg, var(--teal-mid) var(--timeline-progress, 0%), #dadfd3 var(--timeline-progress, 0%)); }
#motionTimeline::-webkit-slider-thumb { width: 15px; height: 15px; appearance: none; border: 3px solid #fff; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 1px rgba(138, 79, 8, .55), 0 2px 5px rgba(20, 24, 26, .28); cursor: pointer; }
#motionTimeline::-moz-range-thumb { width: 9px; height: 9px; border: 3px solid #fff; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 1px rgba(138, 79, 8, .55), 0 2px 5px rgba(20, 24, 26, .28); cursor: pointer; }
html[dir="rtl"] #motionTimeline { background: linear-gradient(270deg, var(--teal-mid) var(--timeline-progress, 0%), #dadfd3 var(--timeline-progress, 0%)); }
.timeline-meta output, .tension-control output { direction: ltr; unicode-bidi: isolate; }
.timeline-ticks { display: flex; justify-content: space-between; color: var(--faint); font: 500 .625rem/1 var(--font-mono); }

.clinical-readout { display: grid; grid-template-columns: 130px minmax(0, 1fr) minmax(360px, .85fr); gap: clamp(20px, 4vw, 60px); max-width: 1500px; margin: clamp(20px, 3vw, 35px) auto 0; padding: clamp(22px, 3vw, 36px); border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
.readout-index { display: grid; align-content: space-between; min-height: 120px; border-inline-end: 1px solid var(--line); }
.readout-index span, .readout-copy > p:first-child { color: var(--teal); font: 500 .625rem/1.3 var(--font-mono); letter-spacing: .12em; }
.readout-index strong { color: rgba(31, 75, 76, .2); font: 500 5rem/.8 var(--font-display); }
.readout-copy > p:first-child { margin: 0 0 9px; }
.readout-copy h2 { margin: 0 0 10px; font: 500 clamp(1.3rem, 2.3vw, 2rem)/1.05 var(--font-display); }
.readout-copy > p:last-child { max-width: 680px; margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.7; }
.readout-facts { display: grid; align-content: center; gap: 12px; }
.readout-facts div { display: grid; grid-template-columns: minmax(90px,.7fr) 1fr; align-items: baseline; gap: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.readout-facts span { color: var(--faint); font-size: .68rem; }.readout-facts strong { color: var(--ink); font-size: .74rem; font-weight: 600; }

.muscle-mechanics { max-width: 1500px; margin: clamp(20px, 3vw, 35px) auto 0; padding: clamp(22px, 3.2vw, 42px); border: 1px solid var(--line); border-radius: var(--radius); background: radial-gradient(circle at 86% 0%, rgba(220, 143, 43, .09), transparent 32%), var(--panel); box-shadow: var(--shadow); }
.mechanics-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; padding-bottom: clamp(24px, 3vw, 34px); border-bottom: 1px solid var(--line); }
.mechanics-heading .eyebrow { margin-bottom: 11px; }
.mechanics-heading h2 { max-width: 560px; margin: 0; font: 500 clamp(1.75rem, 3vw, 3rem)/1 var(--font-display); letter-spacing: -.03em; }
.mechanics-heading > div:first-child > p:last-child { max-width: 620px; margin: 13px 0 0; color: var(--muted); font-size: .84rem; line-height: 1.7; }
.mechanics-key { display: flex; flex: 0 0 auto; gap: 14px; padding: 10px 0; }
.mechanics-key span { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: .68rem; }
.mechanics-key b { font-weight: 700; }
.key-dot { width: 9px; height: 9px; border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(20, 24, 26, .18); }
.key-dot--active { background: var(--amber); }.key-dot--release { background: var(--coral); }.key-dot--yoked { background: var(--teal-mid); }
.mechanics-layout { display: grid; grid-template-columns: minmax(208px, .72fr) minmax(380px, 1.35fr) minmax(260px, .8fr); gap: clamp(15px, 2vw, 26px); padding-top: clamp(22px, 3vw, 34px); }
.muscle-selector { padding-inline-end: clamp(15px, 2vw, 26px); border-inline-end: 1px solid var(--line); }
.muscle-selector > p { margin: 0 0 11px; color: var(--faint); font: 500 .625rem/1 var(--font-mono); letter-spacing: .12em; }
.muscle-selector__grid { display: grid; gap: 6px; }
.muscle-option { display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; align-items: center; gap: 9px; width: 100%; min-height: 50px; padding: 6px 8px; border: 1px solid transparent; border-radius: 10px; color: var(--muted); background: transparent; cursor: pointer; text-align: start; transition: .18s ease; }
.muscle-option:hover { color: var(--ink); border-color: var(--line-strong); background: var(--panel-2); }
.muscle-option.is-active { color: var(--ink); border-color: rgba(220, 143, 43, .55); background: linear-gradient(90deg, var(--amber-soft), rgba(247, 231, 204, 0)); }
.muscle-option strong { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid currentColor; border-radius: 8px; color: var(--teal); font: 500 .66rem/1 var(--font-mono); }
.muscle-option.is-active strong { color: var(--amber-ink); background: var(--amber-soft); }
.muscle-option span { min-width: 0; font-size: .72rem; font-weight: 700; }
.muscle-option small { color: var(--muted); font: 500 .625rem/1 var(--font-mono); }
.force-board { min-width: 0; padding: clamp(17px, 2.1vw, 26px); border: 1px solid rgba(220, 143, 43, .35); border-radius: 15px; background: linear-gradient(145deg, #fff7e8, #ffffff 42%); }
.force-board__topline { display: flex; justify-content: space-between; color: var(--faint); font: 500 .625rem/1 var(--font-mono); letter-spacing: .1em; }
.force-board__topline span:last-child { color: var(--teal); }
.force-board__title { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 13px; }
.force-board__title > div { display: flex; align-items: center; gap: 10px; }
.force-board__title > div > span { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; color: var(--ink); background: var(--amber); font: 600 .66rem/1 var(--font-mono); box-shadow: 0 4px 12px -3px rgba(220, 143, 43, .55); }
.force-board h3 { margin: 0; font: 500 1.28rem/1 var(--font-display); }
.demonstrate-button { display: inline-flex; align-items: center; gap: 7px; min-height: 34px; padding: 0 12px; border: 1px solid var(--teal-line); border-radius: 9px; color: var(--teal); background: var(--teal-soft); cursor: pointer; font-size: .68rem; font-weight: 700; transition: .16s ease; }
.demonstrate-button:hover { color: var(--on-accent); border-color: var(--teal); background: var(--teal); }
.demonstrate-button i { font-size: .9rem; font-style: normal; }
.force-board > p { min-height: 32px; margin: 10px 0 17px; color: var(--muted); font-size: .74rem; line-height: 1.5; }
.tension-control { padding: 12px 13px 10px; border: 1px solid var(--line); border-radius: 11px; background: var(--panel); }
.tension-control > div:first-child { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 9px; }
.tension-control label { color: var(--muted); font-size: .68rem; font-weight: 700; }
.tension-control output { color: var(--amber-ink); font: 500 .76rem/1 var(--font-mono); }
.tension-control input { width: 100%; height: 4px; margin: 0; appearance: none; border-radius: 5px; outline: none; background: linear-gradient(90deg, var(--amber) var(--mechanics-progress, 72%), #dadfd3 var(--mechanics-progress, 72%)); }
html[dir="rtl"] .tension-control input { background: linear-gradient(270deg, var(--amber) var(--mechanics-progress, 72%), #dadfd3 var(--mechanics-progress, 72%)); }
.tension-control input::-webkit-slider-thumb { width: 17px; height: 17px; appearance: none; border: 3px solid #fff; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 1px rgba(138, 79, 8, .55), 0 2px 5px rgba(20, 24, 26, .28); cursor: pointer; }
.tension-control input::-moz-range-thumb { width: 11px; height: 11px; border: 3px solid #fff; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 1px rgba(138, 79, 8, .55), 0 2px 5px rgba(20, 24, 26, .28); cursor: pointer; }
.tension-scale { display: flex; justify-content: space-between; margin-top: 8px; color: var(--faint); font: 500 .625rem/1 var(--font-mono); text-transform: uppercase; }
.force-channels { display: grid; gap: 13px; margin-top: 17px; }
.force-channel__meta { display: grid; grid-template-columns: 1fr auto; gap: 3px 10px; align-items: baseline; }
.force-channel__meta span { grid-column: 1 / -1; color: var(--faint); font: 500 .625rem/1 var(--font-mono); letter-spacing: .075em; }
.force-channel__meta b { color: var(--ink); font-size: .72rem; }
.force-channel__meta strong { font: 500 .74rem/1 var(--font-mono); }
.force-channel--agonist .force-channel__meta strong { color: var(--amber-ink); }
.force-channel--antagonist .force-channel__meta strong { color: var(--coral-ink); }
.force-rail { height: 6px; margin-top: 8px; overflow: hidden; border-radius: 8px; background: #e6e9df; }
.force-rail i { display: block; width: var(--force, 50%); height: 100%; border-radius: inherit; transition: width .28s cubic-bezier(.2,.8,.2,1); }
.force-channel--agonist .force-rail i { background: linear-gradient(90deg, #e9a94f, var(--amber)); }
.force-channel--antagonist .force-rail i { background: linear-gradient(90deg, #e58c7a, var(--coral)); }
.law-card { display: grid; grid-template-rows: auto 1fr auto; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 15px; background: var(--panel-2); }
.law-tabs { display: grid; grid-template-columns: 1fr 1fr; padding: 5px; border-bottom: 1px solid var(--line); background: var(--sunken); }
.law-tabs button { min-height: 32px; border: 0; border-radius: 8px; color: var(--muted); background: transparent; cursor: pointer; font-size: .68rem; font-weight: 700; }
.law-tabs button:hover { color: var(--ink); }
.law-tabs button.is-active { color: var(--teal); background: var(--panel); box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--line-strong); }
.law-card__body { padding: 18px; }
.law-card__label { margin: 0 0 10px; color: var(--teal); font: 500 .625rem/1 var(--font-mono); letter-spacing: .1em; }
.law-card__body h3 { margin: 0; font: 500 1.18rem/1.1 var(--font-display); letter-spacing: -.02em; }
.law-card__body > p:not(.law-card__label) { margin: 11px 0 16px; color: var(--muted); font-size: .72rem; line-height: 1.65; }
.law-diagram { padding: 14px 8px 10px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.law-diagram > div { display: grid; grid-template-columns: auto minmax(12px,1fr) auto minmax(12px,1fr) auto; align-items: center; gap: 6px; }
.law-diagram span { display: grid; place-items: center; min-width: 30px; height: 28px; padding: 0 5px; border: 1px solid currentColor; border-radius: 7px; color: var(--amber-ink); background: var(--amber-soft); font: 500 .625rem/1 var(--font-mono); }
.law-diagram span:last-child { color: var(--coral-ink); background: var(--coral-soft); }
.law-diagram b { color: var(--muted); font: 500 .625rem/1 var(--font-mono); text-align: center; }
.law-line { height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--amber), var(--coral)); opacity: .75; }
.law-diagram small { display: block; margin-top: 9px; color: var(--faint); font-size: .62rem; text-align: center; }
.law-card footer { display: grid; gap: 6px; padding: 14px 18px; border-top: 1px solid var(--line); background: var(--panel); }
.law-card footer span { color: var(--faint); font: 500 .625rem/1 var(--font-mono); letter-spacing: .1em; }
.law-card footer b { color: var(--muted); font-size: .68rem; line-height: 1.55; font-weight: 600; }
.mechanics-note { max-width: 920px; margin: clamp(20px, 2.3vw, 28px) 0 0; color: var(--faint); font-size: .68rem; line-height: 1.65; }
.mechanics-note strong { margin-inline-end: 5px; color: var(--teal); font-weight: 700; }
.model-note { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; max-width: 1500px; margin: 18px auto 0; padding: 0 6px; color: var(--faint); font-size: .7rem; line-height: 1.55; }
.model-note p { max-width: 940px; margin: 0; }.model-note strong { color: var(--muted); }.model-note a { flex: 0 0 auto; color: var(--teal); font-weight: 600; text-decoration: none; }
.model-note a:hover { text-decoration: underline; text-underline-offset: 3px; }

html.app-embedded .lab-header { display: none; }
html.app-embedded .eye3d-page { padding-top: 18px; }
html.app-embedded .eye3d-intro { display: none; }
html.app-embedded .eye3d-workspace { min-height: calc(100dvh - 36px); }

@media (max-width: 1260px) {
  .eye3d-workspace { grid-template-columns: 225px minmax(420px, 1fr) 285px; }
  .structure-row small { display: none; }
  .lab-panel { padding-inline: 14px; }
}

@media (max-width: 980px) {
  .lab-header { grid-template-columns: auto auto; justify-content: space-between; }
  .lab-nav { display: none; }
  .eye3d-intro { grid-template-columns: 1fr; gap: 24px; }
  .intro-metrics { max-width: 620px; }
  .eye3d-workspace { grid-template-columns: 1fr 1fr; }
  .viewport-card { grid-column: 1 / -1; grid-row: 1; min-height: min(68vh, 650px); }
  .structures-panel { grid-column: 1; grid-row: 2; border-inline-end: 1px solid var(--line); border-top: 1px solid var(--line); }
  .motion-panel { grid-column: 2; grid-row: 2; border-inline-start: 0; border-top: 1px solid var(--line); }
  .structure-groups { max-height: 480px; }
  .clinical-readout { grid-template-columns: 90px 1fr; }
  .mechanics-layout { grid-template-columns: minmax(200px, .72fr) minmax(350px, 1.28fr); }
  .law-card { grid-column: 1 / -1; grid-template-columns: 1fr 1.25fr .9fr; grid-template-rows: 1fr; }
  .law-tabs { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; border-bottom: 0; border-inline-end: 1px solid var(--line); }
  .law-card__body { border-inline-end: 1px solid var(--line); }
  .law-card footer { border-top: 0; }
  .readout-facts { grid-column: 1 / -1; grid-template-columns: repeat(3, 1fr); }
  .readout-facts div { display: grid; grid-template-columns: 1fr; }
  html.app-embedded .eye3d-workspace { min-height: auto; }
}

@media (max-width: 640px) {
  .lab-header { min-height: 62px; padding-inline: 14px; }
  .lab-brand small { display: none; }
  .eye3d-page { padding: 18px 9px 24px; }
  .eye3d-intro { padding-inline: 7px; }
  .eye3d-intro h1 { font-size: clamp(2.2rem, 13vw, 3.5rem); }
  .intro-copy { font-size: .85rem; }
  .intro-metrics div { padding: 13px 9px; }
  .intro-metrics span { font-size: .64rem; }
  .eye3d-workspace { display: flex; flex-direction: column; border-radius: 16px; }
  .viewport-card { order: 1; min-height: clamp(440px, 66dvh, 610px); }
  .motion-panel { order: 2; border-top: 1px solid var(--line); }
  .structures-panel { order: 3; border-top: 1px solid var(--line); border-inline-end: 0; }
  .structure-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; max-height: none; }
  .structure-group:last-child { grid-column: 1 / -1; }
  .structure-group:last-child { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 8px; }
  .structure-group:last-child h3 { grid-column: 1 / -1; }
  .render-status small { display: none; }
  .render-status span { white-space: nowrap; }
  .view-presets { bottom: 65px; width: calc(100% - 20px); justify-content: center; }
  .view-button { flex: 1; justify-content: center; padding-inline: 5px; }
  .view-button small { display: none; }
  .gesture-hint { gap: 13px; padding-inline: 12px; }.gesture-hint i { display: none; }
  .orientation-widget { display: none; }
  .clinical-readout { grid-template-columns: 60px 1fr; gap: 18px; padding: 21px 17px; }
  .readout-index strong { font-size: 3.6rem; }
  .readout-facts { grid-template-columns: 1fr; gap: 8px; }
  .readout-facts div { grid-template-columns: 105px 1fr; padding-bottom: 8px; }
  .model-note { display: grid; padding-inline: 8px; }
  .muscle-mechanics { padding: 22px 17px; border-radius: 16px; }
  .mechanics-heading { display: grid; gap: 16px; }
  .mechanics-key { flex-wrap: wrap; gap: 9px 14px; padding: 0; }
  .mechanics-layout { grid-template-columns: 1fr; gap: 18px; }
  .muscle-selector { padding: 0 0 17px; border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .muscle-selector__grid { grid-template-columns: 1fr 1fr; gap: 5px; }
  .muscle-option { grid-template-columns: 28px minmax(0, 1fr); gap: 7px; min-height: 46px; }
  .muscle-option small { display: none; }
  .muscle-option strong { width: 27px; height: 27px; }
  .muscle-option span { font-size: .64rem; }
  .force-board { padding: 16px; }
  .law-card { grid-column: auto; display: grid; grid-template-columns: 1fr; grid-template-rows: auto 1fr auto; }
  .law-tabs { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr; border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .law-card__body { border-inline-end: 0; }
  .law-card footer { border-top: 1px solid var(--line); }
  .mechanics-note { font-size: .64rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}