:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --fg: #111827;
  --muted: #4b5563;
  --border: #e5e7eb;
  --accent: #1d5fb8;
  --accent-soft: #e8f0fb;
  --bad: #b42318;
  --bad-soft: #fdecea;
  --good: #1f7a3a;
  --good-soft: #e7f5ec;
  --figure-bg: #ffffff;
  --hz-path: #cdb06a;
  --hz-dot: #e5a50a;
  --shadow: 0 1px 2px rgba(17, 24, 39, .06), 0 4px 16px rgba(17, 24, 39, .06);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216;
    --bg-soft: #171b21;
    --fg: #e8eaed;
    --muted: #a3aab5;
    --border: #2a3039;
    --accent: #7fb0f5;
    --accent-soft: #1b2a40;
    --bad: #f28b82;
    --bad-soft: #3a1f1d;
    --good: #81c995;
    --good-soft: #1b3325;
    --figure-bg: #ffffff;
    --hz-path: #786428;
    --hz-dot: #f2c94c;
    --shadow: none;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1216;
  --bg-soft: #171b21;
  --fg: #e8eaed;
  --muted: #a3aab5;
  --border: #2a3039;
  --accent: #7fb0f5;
  --accent-soft: #1b2a40;
  --bad: #f28b82;
  --bad-soft: #3a1f1d;
  --good: #81c995;
  --good-soft: #1b3325;
  --figure-bg: #ffffff;
  --hz-path: #786428;
  --hz-dot: #f2c94c;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

.wrap { max-width: 1000px; margin: 0 auto; padding: 0 16px; }

a { color: var(--accent); }

img, video { display: block; max-width: 100%; height: auto; }

/* Hero */
.hero { padding: 56px 0 28px; text-align: center; }
.title { max-width: 860px; margin: 0 auto; font-size: clamp(28px, 4.6vw, 42px); font-weight: 700; line-height: 1.2; text-wrap: balance; }
.authors { margin: 26px 0 2px; font-size: 19px; font-weight: 600; }
.authors span { display: inline-block; margin: 0 14px; }
.affil { margin: 0; color: var(--muted); }
.links { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.btn {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--fg);
  color: var(--bg);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}
.btn:hover { opacity: .85; }
.btn.disabled { background: var(--bg-soft); color: var(--muted); border: 1px solid var(--border); cursor: default; }
.btn.disabled:hover { opacity: 1; }

/* Sections */
section { margin: 56px 0; }
h2 { text-wrap: balance; font-size: 28px; line-height: 1.25; margin: 0 0 14px; }
h3 { font-size: 19px; margin: 0 0 8px; }
.lead { font-size: 18px; color: var(--fg); }
.note { color: var(--muted); font-size: 15px; }

/* Captions */
figcaption { color: var(--muted); font-size: 15px; margin-top: 10px; }
.teaser { margin-top: 8px; }
.teaser .grid { margin-top: 0; }

/* Method cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 26px; }
.card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.card p { margin: 0; font-size: 16px; color: var(--muted); }
.tag {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px; margin-right: 6px;
  border-radius: 50%; background: var(--accent-soft); color: var(--accent);
  font-size: 14px; font-weight: 700; vertical-align: 2px;
}

/* Stats */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 20px 0 26px; }
.stat { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; }
.stat-label { font-weight: 700; font-size: 15px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.stat-row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 4px 0; font-size: clamp(26px, 5vw, 34px); font-weight: 600; font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; font-variant-numeric: tabular-nums; }
.stat-row .arrow { color: var(--muted); font-weight: 400; font-size: .7em; }
.stat-note { color: var(--muted); font-size: 14px; }
.bad { color: var(--bad); }
.good { color: var(--good); }

/* Clip grid */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 20px 0; }
.clip { margin: 0; }
.clip video { width: 100%; border-radius: 10px; background: #000; border: 1px solid var(--border); }
.clip figcaption { margin-top: 8px; }
.pill {
  display: inline-block; margin-right: 6px; padding: 1px 9px;
  border-radius: 999px; font-size: 13px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent);
}
.pill.bad-bg { background: var(--bad-soft); color: var(--bad); }
.pill.good-bg { background: var(--good-soft); color: var(--good); }

/* Hazard-motion tiles and the bench photo: inline SVG, drawn from the
   video's shots 04 and 08 */
.motion-legend, .bench { margin: 20px 0 0; }
.motion-legend svg, .bench svg { display: block; width: 100%; height: auto; margin: 0 auto; }
.motion-legend svg { max-width: 720px; }
.bench svg { max-width: 832px; }
.motion-legend figcaption, .bench figcaption { text-align: center; }
.hz-tile { fill: var(--bg-soft); stroke: var(--border); stroke-width: 1; }
.hz-path { fill: none; stroke: var(--hz-path); }
.hz-dot { fill: var(--hz-dot); }
.hz-label { fill: var(--fg); font: 600 28px "IBM Plex Sans", system-ui, sans-serif; text-anchor: middle; dominant-baseline: central; }
.callout { fill: #f2c94c; }
.callout-label { fill: var(--fg); font: 600 28px "IBM Plex Sans", system-ui, sans-serif; dominant-baseline: central; }

/* Setup boxes: the simulation setup and the device mapping */
.specs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 18px 0 8px; }
.specs.three { grid-template-columns: repeat(3, 1fr); }
.spec { background: var(--bg-soft); border: 1px solid var(--border); border-left: 6px solid var(--accent); border-radius: 10px; padding: 12px 16px; }
.spec.warn { border-left-color: #f2c94c; }
.spec.gpu { border-left-color: #e2a94e; }
.spec.npu { border-left-color: var(--muted); }
.spec-head { font-weight: 700; font-size: 16px; }
.spec-body { color: var(--muted); font-size: 15px; line-height: 1.45; }
.mapping { margin-top: 26px; }
.mapping h3 { margin: 0; }
.mapping .note { margin: 0; }

/* Edge facts */
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 20px 0 24px; }
.facts.two { grid-template-columns: repeat(2, 1fr); }
.fact { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; }
.fact-num { font-size: 23px; font-weight: 600; font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--accent); font-variant-numeric: tabular-nums; }
.fact-text { color: var(--muted); font-size: 15px; }

/* BibTeX */
.bib { position: relative; }
.bib pre {
  margin: 0; padding: 18px; overflow-x: auto;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 12px;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; line-height: 1.5;
}
.copy {
  position: absolute; top: 10px; right: 10px;
  padding: 5px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--fg); font: inherit; font-size: 13px; cursor: pointer;
}

.footer { border-top: 1px solid var(--border); padding: 24px 0 40px; color: var(--muted); font-size: 14px; text-align: center; }

@media (max-width: 760px) {
  body { font-size: 16px; }
  .hero { padding-top: 36px; }
  .cards, .stats, .grid, .facts, .facts.two, .specs.three { grid-template-columns: 1fr; }
  .specs { grid-template-columns: 1fr 1fr; }
  section { margin: 44px 0; }
  h2 { font-size: 24px; }
}

a:focus-visible, .btn:focus-visible, button:focus-visible, video:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}