/* Layout: a render-studio page. The hero is a texture|geometry split viewer; content sits on one
   1200px column; a diagonal occlusion hatch marks whatever is "unobserved". Single light look. */
:root {
  color-scheme: light;
  /* color */
  --bg: #f1f2f4;            /* studio backdrop */
  --surface: #ffffff;       /* render white (matches the RGB half of every video) */
  --sunk: #e9ebef;
  --ink: #12141a;
  --ink-2: #4a505e;
  --ink-3: #7c8293;
  --line: rgba(18, 20, 26, 0.10);
  --line-strong: rgba(18, 20, 26, 0.20);
  --normal-bg: #808080;     /* background of the normal-map renders */
  --nx: #ff6f91;            /* normal-map pink */
  --ny: #7a6cff;            /* normal-map violet */
  --nz: #34c98a;            /* normal-map green */
  --accent: #4535e8;        /* links, primary actions */
  --accent-ink: #ffffff;
  --occ: #e5484d;           /* occluded / masked */
  --good: #15803d;
  --bad: #d92d3a;
  --hatch: repeating-linear-gradient(135deg, rgba(18, 20, 26, 0.16) 0 1.5px, transparent 1.5px 8px);

  /* type */
  --f-display: "Unbounded", "Arial Black", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 14px;
  --topbar-h: 60px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.65 var(--f-body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, video, canvas, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
::selection { background: rgba(122, 108, 255, 0.25); }
[hidden] { display: none !important; }
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 6px; }
.skip-link:focus { left: 12px; }
.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.vh { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ───────── top bar ───────── */
.topbar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: rgba(241, 242, 244, 0.82); -webkit-backdrop-filter: blur(14px) saturate(160%); backdrop-filter: blur(14px) saturate(160%); border-bottom: 1px solid var(--line); }
.topbar-inner { display: flex; align-items: center; gap: 24px; height: var(--topbar-h); }
.brand { font: 800 16px/1 var(--f-display); letter-spacing: -0.01em; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 26px; height: 26px; border-radius: 7px; background: conic-gradient(from 210deg, var(--nx), var(--ny), var(--nz), var(--nx)); position: relative; flex: none; }
.brand-mark::after { content: ""; position: absolute; inset: 7px 0 0 7px; border-radius: 0 0 7px 0; background: var(--hatch), var(--surface); border-left: 1.5px solid var(--ink); border-top: 1.5px solid var(--ink); }
.nav { display: flex; gap: 2px; margin-left: auto; }
.nav a { color: var(--ink-2); text-decoration: none; font: 500 13px/1 var(--f-mono); padding: 8px 10px; border-radius: 6px; white-space: nowrap; }
.nav a:hover { color: var(--ink); background: rgba(18, 20, 26, 0.06); }
.nav a.is-active { color: var(--accent); }
.topbar-cta { display: flex; gap: 8px; }
.progress { position: absolute; left: 0; bottom: -1px; height: 2px; width: 100%; transform-origin: 0 50%; transform: scaleX(0); background: linear-gradient(90deg, var(--nx), var(--ny), var(--nz)); }
@media (max-width: 1000px) { .nav { display: none; } .topbar-cta { margin-left: auto; } }

/* ───────── buttons ───────── */
.btn { display: inline-flex; align-items: center; gap: 8px; height: 42px; padding: 0 16px; border-radius: 999px; font: 600 14.5px/1 var(--f-body); text-decoration: none; white-space: nowrap; color: var(--ink); background: var(--surface); border: 1px solid var(--line-strong); cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s; }
.btn svg { width: 17px; height: 17px; flex: none; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px -10px rgba(18, 20, 26, 0.35); }
.btn--primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn--sm { height: 34px; padding: 0 12px; font-size: 13px; }
@media (max-width: 520px) { .topbar-cta .btn--sm span { display: none; } .topbar-cta .btn--sm { padding: 0 10px; } }

/* ───────── hero ───────── */
.hero { position: relative; padding-block: clamp(36px, 6vw, 80px) clamp(36px, 5vw, 64px); overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(800px 480px at 85% 30%, rgba(122, 108, 255, 0.12), transparent 70%), radial-gradient(700px 420px at 10% 90%, rgba(255, 111, 145, 0.10), transparent 70%), radial-gradient(600px 400px at 60% 100%, rgba(52, 201, 138, 0.10), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
@media (max-width: 980px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }

.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; padding: 0; list-style: none; }
.badge { display: inline-flex; align-items: center; gap: 8px; height: 30px; padding: 0 12px; border-radius: 999px; font: 500 12.5px/1 var(--f-mono); color: var(--ink-2); background: var(--surface); border: 1px solid var(--line); }
.badge--venue { color: #fff; background: var(--ink); border-color: var(--ink); }
.badge--venue i { width: 8px; height: 8px; border-radius: 50%; background: conic-gradient(var(--nx), var(--ny), var(--nz), var(--nx)); }

.wordmark { position: relative; display: inline-block; margin: 0; font: 800 clamp(54px, 6.8vw, 104px)/0.9 var(--f-display); letter-spacing: -0.045em; color: var(--ink); }
.wordmark .wm-3d { background: linear-gradient(115deg, var(--nx) 5%, var(--ny) 50%, var(--nz) 95%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.wm-occluder {
  position: absolute; left: 47%; right: -6%; top: 42%; bottom: -8%;
  border-radius: 8px; border: 1.5px solid var(--ink); background: var(--hatch), var(--surface);
  box-shadow: 0 18px 30px -18px rgba(18, 20, 26, 0.5);
  display: grid; place-items: center; pointer-events: none;
  animation: occluder-away 1.1s 0.7s cubic-bezier(.65, 0, .25, 1) forwards;
}
.wm-occluder span { font: 500 12px/1 var(--f-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink); background: var(--surface); padding: 5px 8px; border-radius: 4px; border: 1px solid var(--line-strong); }
@keyframes occluder-away { 0% { transform: none; opacity: 1; } 100% { transform: translate(18%, 140%) rotate(8deg); opacity: 0; visibility: hidden; } }
@media (prefers-reduced-motion: reduce) { .wm-occluder { display: none; } }

.subtitle { margin: 26px 0 0; font: 500 clamp(19px, 1.2rem + 0.5vw, 24px)/1.35 var(--f-body); color: var(--ink); max-width: 30ch; text-wrap: balance; }
.subtitle b { font-weight: 700; }
.authors { list-style: none; padding: 0; margin: 26px 0 0; display: flex; flex-wrap: wrap; gap: 4px 22px; font: 600 19px/1.4 var(--f-body); }
.authors a { color: var(--ink); text-decoration: none; border-bottom: 1.5px solid var(--line-strong); }
.authors a:hover { border-color: var(--accent); color: var(--accent); }
.affil { margin: 6px 0 0; color: var(--ink-2); font-size: 16px; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }

/* texture | geometry split viewer */
.viewer { margin: 0; min-width: 0; }
.vw-stage { position: relative; width: 100%; max-width: 620px; aspect-ratio: 1 / 1; margin-inline: auto; border-radius: 22px; overflow: hidden; background: var(--surface); border: 1px solid var(--line); box-shadow: 0 40px 80px -40px rgba(18, 20, 26, 0.45); touch-action: pan-y; cursor: ew-resize; user-select: none; -webkit-user-select: none; }
.vw-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.vw-src { position: absolute; width: 2px; height: 1px; opacity: 0; pointer-events: none; left: 0; top: 0; }
.vw-line { position: absolute; top: 0; bottom: 0; width: 2px; margin-left: -1px; background: var(--ink); pointer-events: none; }
.vw-knob { position: absolute; top: 50%; width: 44px; height: 44px; margin: -22px 0 0 -22px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; box-shadow: 0 10px 24px -8px rgba(18, 20, 26, 0.6); cursor: ew-resize; touch-action: none; }
.vw-knob svg { width: 22px; height: 22px; }
.vw-label { position: absolute; top: 14px; padding: 6px 10px; border-radius: 8px; font: 500 11px/1 var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; pointer-events: none; }
.vw-label--l { left: 14px; background: var(--surface); color: var(--ink); border: 1px solid var(--line-strong); }
.vw-label--r { right: 14px; background: rgba(18, 20, 26, 0.78); color: #fff; }
.vw-hint { position: absolute; left: 50%; top: 14px; transform: translateX(-50%); padding: 6px 10px; border-radius: 999px; background: rgba(18, 20, 26, 0.72); color: #fff; font: 500 11px/1 var(--f-mono); letter-spacing: 0.06em; pointer-events: none; transition: opacity .4s; white-space: nowrap; }
.vw-stage.touched .vw-hint { opacity: 0; }
.vw-input { position: absolute; left: 12px; bottom: 12px; max-width: min(46%, 300px); padding: 7px; border-radius: 12px; background: var(--hatch), var(--surface); border: 1.5px solid var(--ink); box-shadow: 0 14px 30px -14px rgba(18, 20, 26, 0.45); pointer-events: none; }
.vw-input-k { display: block; margin: 0 0 6px 2px; font: 500 10.5px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); }
.vw-input-k b { font-weight: 500; color: var(--ink-2); }
.vw-thumbs { display: grid; gap: 4px; }
.vw-thumbs img { display: block; width: 100%; height: 100%; object-fit: contain; background: #fff; border-radius: 6px; border: 1px solid var(--line); }
.vw-thumbs[data-kind="obj"] { grid-template-columns: repeat(var(--n), 52px); grid-auto-rows: 64px; }
.vw-thumbs[data-kind="obj"][data-n="4"] { grid-template-columns: repeat(2, 52px); }
.vw-thumbs[data-kind="photo"] { grid-template-columns: repeat(var(--n), minmax(0, 120px)); }
.vw-thumbs[data-kind="photo"] img { height: auto; aspect-ratio: 4 / 3; object-fit: cover; }
@media (max-width: 520px) {
  .vw-thumbs[data-kind="obj"] { grid-template-columns: repeat(var(--n), 38px); grid-auto-rows: 46px; }
  .vw-thumbs[data-kind="obj"][data-n="4"] { grid-template-columns: repeat(2, 38px); }
  .vw-thumbs[data-kind="photo"] { grid-template-columns: repeat(var(--n), minmax(0, 84px)); }
}
.vw-picker { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; max-width: 620px; margin: 16px auto 0; }
@media (max-width: 480px) { .vw-picker { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.vw-chip { display: flex; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; align-items: center; gap: 8px; padding: 4px 12px 4px 4px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); font: 500 13px/1 var(--f-body); color: var(--ink-2); cursor: pointer; transition: border-color .2s, box-shadow .2s; }
.vw-chip img { flex: none; width: 30px; height: 30px; border-radius: 50%; object-fit: cover; background: var(--surface); border: 1px solid var(--line); }
.vw-chip:hover { border-color: var(--line-strong); color: var(--ink); }
.vw-chip[aria-pressed="true"] { border-color: var(--ink); color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.vw-caption { margin: 12px auto 0; max-width: 600px; text-align: center; font-size: 13.5px; color: var(--ink-3); line-height: 1.5; }

/* ───────── headline numbers ───────── */
.numbers { border-block: 1px solid var(--line); background: var(--surface); }
.numbers-inner { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.num { padding: 26px 22px 24px; border-left: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.num:first-child { border-left: 0; padding-left: 0; }
.num-v { font: 700 clamp(30px, 1.4rem + 1.6vw, 42px)/1 var(--f-display); letter-spacing: -0.03em; color: var(--ink); }
.num-v small { font-size: 0.5em; font-weight: 600; color: var(--ink-2); margin-left: 3px; letter-spacing: 0; }
.num-l { font: 600 14px/1.3 var(--f-body); color: var(--ink); }
.num-d { font-size: 13px; color: var(--ink-3); line-height: 1.45; }
.num-d b { color: var(--ink-2); font-weight: 600; font-variant-numeric: tabular-nums; }
@media (max-width: 900px) {
  .numbers-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .num { padding: 20px 16px 20px 0; border-left: 0; border-top: 1px solid var(--line); }
  .num:nth-child(-n+2) { border-top: 0; }
  .num:nth-child(even) { padding-left: 16px; border-left: 1px solid var(--line); }
}

/* ───────── sections ───────── */
.section { padding-block: clamp(60px, 8vw, 110px) 0; }
.sec-head { display: grid; grid-template-columns: minmax(0, 230px) minmax(0, 1fr); gap: 12px clamp(20px, 4vw, 52px); margin-bottom: clamp(24px, 3.5vw, 40px); }
.sec-ref { display: flex; flex-direction: column; gap: 8px; padding-top: 6px; font: 500 12px/1.4 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.sec-ref::before { content: ""; width: 44px; height: 14px; border-radius: 3px; border: 1.5px solid var(--ink); background: var(--hatch), var(--surface); }
.sec-ref span { color: var(--ink-2); }
.sec-title { margin: 0; font: 700 clamp(28px, 1.2rem + 2.2vw, 44px)/1.1 var(--f-display); letter-spacing: -0.03em; text-wrap: balance; }
.sec-lead { margin: 14px 0 0; color: var(--ink-2); max-width: 66ch; font-size: 17.5px; }
.sec-lead strong { color: var(--ink); }
@media (max-width: 820px) { .sec-head { grid-template-columns: minmax(0, 1fr); } }

.prose { color: var(--ink-2); max-width: 70ch; }
.prose p { margin: 0 0 1em; }
.prose strong { color: var(--ink); }

/* figure plates */
.plate { margin: 0; }
.plate-img { position: relative; display: block; width: 100%; padding: clamp(10px, 1.6vw, 20px); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); cursor: zoom-in; }
.plate-img img { width: 100%; height: auto; margin: 0 auto; }
.plate-img .zoom { position: absolute; right: 10px; top: 10px; width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; background: var(--ink); color: #fff; opacity: 0; transition: opacity .2s; }
.plate-img:hover .zoom, .plate-img:focus-visible .zoom { opacity: 1; }
.plate-img .zoom svg { width: 16px; height: 16px; }
figcaption, .caption { margin-top: 12px; font-size: 14px; color: var(--ink-3); line-height: 1.55; max-width: 95ch; }
.fig-no { font: 500 11.5px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); margin-right: 8px; }

/* overview */
.demo { padding: 0; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); }
.demo video { width: 100%; height: auto; aspect-ratio: 1600 / 612; }
.contrast { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: clamp(24px, 3vw, 36px) 0 18px; }
@media (max-width: 860px) { .contrast { grid-template-columns: minmax(0, 1fr); } }
.c-card { position: relative; padding: 18px 18px 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); min-width: 0; }
.c-card .k { font: 500 11.5px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.c-card h3 { margin: 10px 0 6px; font: 700 18px/1.25 var(--f-body); }
.c-card p { margin: 0; font-size: 15px; color: var(--ink-2); line-height: 1.55; }
.c-card .verdict { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; border-radius: 999px; font: 500 12px/1.2 var(--f-mono); border: 1px solid var(--line); background: var(--bg); color: var(--ink-2); }
.pill--yes { color: var(--good); border-color: rgba(21, 128, 61, 0.3); background: rgba(21, 128, 61, 0.06); }
.pill--no { color: var(--bad); border-color: rgba(217, 45, 58, 0.3); background: rgba(217, 45, 58, 0.05); }
.c-card--ours { border-color: transparent; background: linear-gradient(var(--surface), var(--surface)) padding-box, linear-gradient(115deg, var(--nx), var(--ny), var(--nz)) border-box; border: 2px solid transparent; }
.overview-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(24px, 4vw, 56px); align-items: start; margin-top: clamp(28px, 4vw, 48px); }
@media (max-width: 900px) { .overview-grid { grid-template-columns: minmax(0, 1fr); } }
@media (min-width: 901px) { .overview-grid > .plate { position: sticky; top: calc(var(--topbar-h) + 28px); } }

/* method */
.steps { list-style: none; margin: 18px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; counter-reset: s; }
@media (max-width: 1100px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .steps { grid-template-columns: minmax(0, 1fr); } }
.step { counter-increment: s; position: relative; padding: 16px 16px 16px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.step::before { content: counter(s, decimal-leading-zero); font: 500 12px/1 var(--f-mono); color: var(--ink-3); }
.step h3 { margin: 0; font: 700 16px/1.3 var(--f-body); }
.step p { margin: 0; font-size: 14px; color: var(--ink-2); line-height: 1.5; }
.step .who { margin-top: auto; padding-top: 8px; font: 500 11.5px/1.3 var(--f-mono); color: var(--ink-3); }
.step--new { border: 2px solid transparent; background: linear-gradient(var(--surface), var(--surface)) padding-box, linear-gradient(115deg, var(--nx), var(--ny), var(--nz)) border-box; }
.step--new .who { color: var(--accent); }
@media (min-width: 1101px) { .step + .step::after { content: ""; position: absolute; left: -10px; top: 26px; width: 10px; height: 2px; background: var(--line-strong); } }

.modules { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; margin-top: 18px; }
@media (max-width: 900px) { .modules { grid-template-columns: minmax(0, 1fr); } }
.mcard { padding: clamp(18px, 2.2vw, 26px); border-radius: 18px; background: var(--surface); border: 1px solid var(--line); min-width: 0; display: flex; flex-direction: column; gap: 10px; }
.mcard .k { font: 500 11.5px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.mcard h3 { margin: 0; font: 700 22px/1.2 var(--f-display); letter-spacing: -0.02em; }
.mcard p { margin: 0; font-size: 15.5px; color: var(--ink-2); line-height: 1.6; }
.mcard .why { font-size: 14.5px; color: var(--ink-2); padding: 10px 12px; border-radius: 10px; background: var(--bg); }
.mcard .why b { color: var(--ink); }
.math { display: block; padding: 12px 14px; border-radius: 10px; background: var(--ink); color: #e9ebf2; font: 13.5px/1.7 var(--f-mono); overflow-x: auto; white-space: pre; }
.math .c { color: #9aa3b8; }
.math .h { color: #c8bfff; }
.mcard .tag { font: 500 12px/1.4 var(--f-mono); color: var(--ink-3); }
.mcard .tag b { color: var(--bad); font-weight: 500; }

.figpair { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 18px; margin-top: 18px; align-items: start; }
@media (max-width: 900px) { .figpair { grid-template-columns: minmax(0, 1fr); } }

.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin-top: 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
@media (max-width: 900px) { .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.fact { padding: 18px; border-left: 1px solid var(--line); min-width: 0; }
.fact:first-child { border-left: 0; }
@media (max-width: 900px) { .fact:nth-child(odd) { border-left: 0; } .fact:nth-child(n+3) { border-top: 1px solid var(--line); } }
.fact b { display: block; font: 700 20px/1.2 var(--f-display); letter-spacing: -0.02em; margin-bottom: 6px; }
.fact span { font-size: 14px; color: var(--ink-2); line-height: 1.5; }

/* tables */
.panel { padding: clamp(16px, 2.2vw, 24px); border-radius: 18px; background: var(--surface); border: 1px solid var(--line); min-width: 0; }
.panel + .panel, .plate + .panel, .panel + .plate { margin-top: 18px; }
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.t { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; min-width: 560px; }
table.t caption { text-align: left; caption-side: top; padding-bottom: 10px; font-size: 13.5px; color: var(--ink-3); line-height: 1.5; }
table.t caption b { font: 500 11.5px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); margin-right: 8px; }
table.t th, table.t td { padding: 8px 10px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.t th.l, table.t td.l { text-align: left; }
table.t thead th { font: 500 12px/1.3 var(--f-mono); color: var(--ink-3); border-bottom-color: var(--line-strong); }
table.t td { color: var(--ink-2); }
table.t td[rowspan] { vertical-align: middle; color: var(--ink); font: 500 12.5px/1.3 var(--f-mono); }
table.t tr.ours td { color: var(--ink); background: rgba(122, 108, 255, 0.07); }
table.t tr.grp-end td { border-bottom: 1.5px solid var(--line-strong); }
table.t .best { color: var(--ink); font-weight: 700; }
table.t .second { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
table.t .d { font: 500 11.5px var(--f-mono); margin-left: 6px; }
table.t .d.up { color: var(--good); }
table.t .d.dn { color: var(--bad); }
table.t .d.eq { color: var(--ink-3); }
.t caption .best { font-weight: 700; color: var(--ink); }
.t caption .second { text-decoration: underline; text-underline-offset: 3px; color: var(--ink); }
.tgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 18px; }
@media (max-width: 1100px) { .tgrid { grid-template-columns: minmax(0, 1fr); } }
.tgrid .panel { margin: 0; }
.tgrid table.t { min-width: 0; font-size: 13.5px; }
.tgrid table.t th, .tgrid table.t td { padding: 8px 6px; }
.note { margin: 12px 0 0; font-size: 13.5px; color: var(--ink-3); line-height: 1.55; }

/* ───────── video gallery ───────── */
.g-bar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.tabs button { display: inline-flex; align-items: center; gap: 8px; font: 500 13.5px/1 var(--f-body); color: var(--ink-2); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 10px 14px; cursor: pointer; }
.tabs button i { font: 500 11px/1 var(--f-mono); font-style: normal; color: var(--ink-3); }
.tabs button:hover { color: var(--ink); border-color: var(--line-strong); }
.tabs button[aria-selected="true"] { color: #fff; background: var(--ink); border-color: var(--ink); }
.tabs button[aria-selected="true"] i { color: rgba(255, 255, 255, 0.65); }
.seg { display: inline-flex; padding: 3px; gap: 2px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); }
.seg button { font: 500 12.5px/1 var(--f-mono); color: var(--ink-2); background: transparent; border: 0; border-radius: 999px; padding: 9px 13px; cursor: pointer; display: inline-flex; align-items: center; gap: 7px; }
.seg button i { width: 10px; height: 10px; border-radius: 50%; }
.seg button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.g-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 1100px) { .g-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 720px) { .g-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; } }
.g-card { margin: 0; min-width: 0; }
.g-media { position: relative; display: block; width: 100%; aspect-ratio: 1 / 1; max-width: 100%; border-radius: var(--radius); overflow: hidden; background: var(--surface); border: 1px solid var(--line); }
.g-media video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 0% 50%; transform: scale(1.025); transition: object-position .8s cubic-bezier(.65, 0, .25, 1); }
.g-grid[data-mode="geo"] .g-media video { object-position: 100% 50%; }
@media (hover: hover) {
  .g-grid[data-mode="tex"] .g-card:hover .g-media video { object-position: 100% 50%; }
  .g-grid[data-mode="geo"] .g-card:hover .g-media video { object-position: 0% 50%; }
}
.g-card.flip .g-media video { object-position: 100% 50%; }
.g-grid[data-mode="geo"] .g-card.flip .g-media video { object-position: 0% 50%; }
.g-flip { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; border: 0; padding: 0; margin: 0; background: transparent; cursor: pointer; border-radius: inherit; }
.g-flip:focus-visible { outline: 2px solid var(--accent); outline-offset: -3px; }
.g-input { display: block; width: 100%; margin-top: 8px; padding: 7px 8px 8px; border-radius: 12px; border: 1px solid var(--line-strong); background: var(--hatch), var(--surface); cursor: zoom-in; text-align: left; font: inherit; color: inherit; transition: border-color .2s, box-shadow .2s; }
.g-input:hover { border-color: var(--ink); box-shadow: 0 8px 20px -12px rgba(18, 20, 26, 0.4); }
.g-input-k { display: flex; justify-content: space-between; gap: 8px; margin: 0 1px 6px; font: 500 10.5px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); }
.g-input-k span:last-child { color: var(--ink-3); }
.g-thumbs { display: flex; gap: 5px; height: 66px; }
.g-thumbs img { flex: 1 1 0; min-width: 0; height: 100%; object-fit: contain; background: #fff; border-radius: 6px; border: 1px solid var(--line); }
.g-input--photo .g-thumbs img { object-fit: cover; }
.g-input--photo .g-thumbs img:only-child { flex: 0 1 auto; width: auto; aspect-ratio: 4 / 3; object-fit: cover; }
@media (max-width: 720px) { .g-thumbs { height: 44px; gap: 4px; } }
.g-card figcaption { margin-top: 8px; display: flex; justify-content: space-between; gap: 8px; font: 600 14px/1.3 var(--f-body); color: var(--ink); }
.g-card figcaption span { font: 500 11.5px/1.3 var(--f-mono); color: var(--ink-3); white-space: nowrap; }
.g-hint { margin: 14px 0 0; font-size: 13.5px; color: var(--ink-3); }

/* figure tabs */
.ftabs { margin-top: clamp(32px, 4vw, 48px); }

/* limitations */
.limits { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 18px; align-items: center; }
@media (max-width: 900px) { .limits { grid-template-columns: minmax(0, 1fr); } }

/* bibtex + footer */
.bib { position: relative; border-radius: var(--radius); background: var(--ink); }
.bib pre { margin: 0; padding: 22px; overflow-x: auto; font: 13.5px/1.7 var(--f-mono); color: #d7dae3; }
.bib pre .k { color: #ff9ab4; }
.bib pre .f { color: #a9a0ff; }
.bib .copy { position: absolute; right: 12px; top: 12px; }
.footer { margin-top: clamp(60px, 8vw, 110px); border-top: 1px solid var(--line); padding-block: 28px 40px; color: var(--ink-3); font-size: 14px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer a { color: var(--ink-2); }

/* lightbox */
.lightbox { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; padding: 24px; background: rgba(241, 242, 244, 0.94); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.lightbox-inner { max-width: min(1700px, 100%); max-height: 100%; overflow: auto; background: var(--surface); border-radius: 12px; padding: 14px; border: 1px solid var(--line); box-shadow: 0 30px 80px -30px rgba(18, 20, 26, 0.4); }
.lightbox img { max-width: 100%; height: auto; }
.lightbox .close { position: fixed; top: 16px; right: 16px; width: 40px; height: 40px; border-radius: 50%; border: 0; background: var(--ink); color: #fff; display: grid; place-items: center; cursor: pointer; }
.lightbox .close svg { width: 18px; height: 18px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}