/* ==========================================================================
   CoDimRecon project page
   ========================================================================== */

@font-face {
  font-family: "Inter Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(../fonts/inter-latin-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(../fonts/inter-latin-ext-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Inter Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(../fonts/inter-greek-wght-normal.woff2) format("woff2-variations");
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
@font-face {
  font-family: "Inter Variable";
  font-style: italic;
  font-display: swap;
  font-weight: 100 900;
  src: url(../fonts/inter-latin-wght-italic.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Newsreader Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url(../fonts/newsreader-latin-opsz-normal.woff2) format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-display: swap;
  font-weight: 400;
  src: url(../fonts/jetbrains-mono-latin-400-normal.woff2) format("woff2");
}

:root {
  --bg: #fbfaf7;
  --bg-band: #f4f2ec;
  --card: #ffffff;
  --ink: #1a1d24;
  --ink-2: #303542;
  --muted: #6b7180;
  --faint: #9aa0ad;
  --line: #e8e4db;
  --line-2: #d8d2c5;

  /* Pipeline stages (match the overview figure) */
  --stage-a: #4d6a86;
  --stage-b: #7b5ea7;
  --stage-c: #23806c;

  /* Codimensions */
  --curve: #c8662f;
  --surface: #6c56c2;
  --volume: #23806c;
  --artic: #4d6a86;

  --curve-soft: #fbeee5;
  --surface-soft: #efecfa;
  --volume-soft: #e5f3ef;
  --artic-soft: #e9eef4;

  --best: rgba(35, 128, 108, 0.2);
  --second: rgba(35, 128, 108, 0.075);

  --grad: linear-gradient(120deg, #4d6a86 0%, #6c56c2 48%, #23806c 100%);

  --serif: "Newsreader Variable", "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter Variable", "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wide: 1180px;
  --narrow: 860px;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(26, 29, 36, 0.04), 0 8px 28px rgba(26, 29, 36, 0.06);
  --shadow-lg: 0 2px 4px rgba(26, 29, 36, 0.05), 0 18px 48px rgba(26, 29, 36, 0.1);
  --nav-h: 60px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

img {
  height: auto;
}

a {
  color: var(--surface);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--ink);
}

strong {
  font-weight: 650;
}

sup {
  font-size: 0.68em;
  line-height: 0;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--surface);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: calc(var(--wide) + 48px);
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow {
  max-width: calc(var(--narrow) + 48px);
}

/* ---------- Navigation ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(251, 250, 247, 0.82);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.nav.is-scrolled {
  border-bottom-color: var(--line);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
  font-size: 16px;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.brand svg {
  width: 26px;
  height: 26px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 6px 11px;
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-links a:hover {
  background: rgba(26, 29, 36, 0.05);
  color: var(--ink);
}

.nav-links a.is-active {
  background: var(--ink);
  color: #fff;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 56px 0 28px;
  background:
    radial-gradient(900px 380px at 12% -10%, rgba(108, 86, 194, 0.08), transparent 70%),
    radial-gradient(700px 320px at 92% 0%, rgba(35, 128, 108, 0.08), transparent 70%);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 14px 6px 10px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(26, 29, 36, 0.04);
}

.badge-dots {
  display: inline-flex;
  gap: 3px;
}

.badge-dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.badge-dots i:nth-child(1) { background: var(--curve); }
.badge-dots i:nth-child(2) { background: var(--surface); }
.badge-dots i:nth-child(3) { background: var(--volume); }

.title {
  margin: 22px 0 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.35rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  max-width: 1020px;
}

.title-name {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.title-sub {
  display: block;
  margin-top: 10px;
  font-size: 0.6em;
  font-weight: 500;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.authors {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  font-size: 17px;
  font-weight: 500;
}

.authors sup {
  color: var(--surface);
  font-weight: 600;
  margin-left: 1px;
}

.authors a {
  color: inherit;
  text-decoration: none;
}

.authors a:hover,
.authors a:focus-visible {
  text-decoration: underline;
}

.affiliations {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 20px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 15px;
}

.affiliations sup {
  color: var(--surface);
  margin-right: 2px;
}

.author-notes {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 18px 0 15px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 14.5px;
  font-weight: 550;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.pill svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.pill:hover {
  color: #fff;
  background: #2c313c;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(26, 29, 36, 0.18);
}

.pill.is-soon {
  background: #e9e6df;
  color: #7c818d;
  cursor: default;
}

.pill.is-soon:hover {
  transform: none;
  box-shadow: none;
}

.pill .soon {
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(26, 29, 36, 0.07);
}

.pill.is-ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line-2);
}

.pill.is-ghost:hover {
  background: #fff;
  color: var(--ink);
}

/* Hero reel: one clip per codimension */

.reel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 44px;
}

.reel-item {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: #11141a;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 1 / 1;
}

.reel-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.reel-item figcaption {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  pointer-events: none;
}

.reel-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

.reel-label i {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-style: normal;
  font-size: 10px;
  font-weight: 700;
}

.reel-label small {
  color: var(--muted);
  font-weight: 500;
  font-size: 12.5px;
}

.reel-item.curve .reel-label i { background: var(--curve); }
.reel-item.surface .reel-label i { background: var(--surface); }
.reel-item.volume .reel-label i { background: var(--volume); }

/* ---------- Sections ---------- */

.section {
  padding: 84px 0 12px;
}

.section.band {
  margin-top: 72px;
  padding: 84px 0 88px;
  background: var(--bg-band);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section.band + .section {
  padding-top: 84px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 3.4vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  margin-top: 18px;
  border-radius: 3px;
  background: var(--grad);
}

h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.2;
  letter-spacing: -0.005em;
}

h4 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.section-intro {
  margin: 22px 0 0;
  max-width: 900px;
  color: var(--ink-2);
  font-size: 17.5px;
}

.sub-head {
  margin-top: 64px;
}

.sub-head .section-intro {
  margin-top: 10px;
}

p {
  margin: 0 0 1em;
}

/* ---------- Cards & figures ---------- */

.figure {
  margin: 34px 0 0;
}

.figure-frame {
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.figure-frame img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.zoomable {
  cursor: zoom-in;
}

.caption {
  margin: 16px 2px 0;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.62;
}

.caption strong {
  color: var(--ink);
}

.caption.muted {
  color: var(--muted);
}

.hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.math {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.08em;
  white-space: nowrap;
}

kbd,
code {
  font-family: var(--mono);
  font-size: 0.86em;
  padding: 1px 6px;
  border-radius: 5px;
  background: rgba(26, 29, 36, 0.055);
  color: var(--ink-2);
}

/* ---------- Abstract ---------- */

.abstract p {
  font-size: 17.5px;
  color: var(--ink-2);
  line-height: 1.72;
}

.abstract p:first-of-type {
  margin-top: 26px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.stat {
  padding: 18px 18px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.stat-value {
  display: block;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 2rem;
  line-height: 1.05;
  letter-spacing: -0.01em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.5;
}

/* ---------- Tabs / chips ---------- */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-2);
  font-size: 13.5px;
  font-weight: 550;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.chip:hover {
  border-color: var(--ink-2);
}

.chip[aria-selected="true"],
.chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.chip small {
  font-weight: 500;
  opacity: 0.65;
  font-size: 12px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.tag::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.tag.curve { background: var(--curve-soft); color: var(--curve); }
.tag.surface { background: var(--surface-soft); color: var(--surface); }
.tag.volume { background: var(--volume-soft); color: var(--volume); }
.tag.artic { background: var(--artic-soft); color: var(--artic); }

/* ---------- Interactive articulated scene ---------- */

.explore {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 16px;
  margin-top: 34px;
  align-items: stretch;
}

.stage {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius);
  background: #dfe2da;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  min-height: 640px;
}

.stage-canvas {
  position: relative;
  flex: 1;
  min-height: 480px;
}

.stage-canvas canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  touch-action: none;
  cursor: grab;
}

.stage-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px 10px 16px;
  background: rgba(255, 255, 255, 0.72);
  border-top: 1px solid rgba(26, 29, 36, 0.07);
  backdrop-filter: blur(8px);
}

.stage-toolbar .hint {
  flex-wrap: wrap;
  gap: 4px 14px;
}

.tool-btns {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.tool-btn {
  height: 32px;
  padding: 0 13px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: #fff;
  font-size: 13px;
  font-weight: 550;
  cursor: pointer;
  white-space: nowrap;
}

.tool-btn:hover {
  border-color: var(--ink-2);
}

.tool-btn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.stage-hover {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(26, 29, 36, 0.82);
  color: #fff;
  font-size: 12.5px;
  font-weight: 550;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.stage-hover.is-visible {
  opacity: 1;
  transform: none;
}

.stage-stamp {
  position: absolute;
  right: 16px;
  top: 14px;
  display: grid;
  grid-template-columns: auto auto;
  gap: 0 8px;
  align-items: baseline;
  color: rgba(26, 29, 36, 0.62);
  pointer-events: none;
}

.stage-stamp strong {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  text-align: right;
  color: rgba(26, 29, 36, 0.78);
}

.stage-stamp span {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.loader {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px;
  text-align: center;
  background: rgba(223, 226, 218, 0.88);
  color: var(--ink-2);
  transition: opacity 0.35s ease;
}

.loader.is-done {
  opacity: 0;
  pointer-events: none;
}

.loader img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
  filter: blur(2px) saturate(0.7);
}

.loader > *:not(img) {
  position: relative;
}

.loader strong {
  font-size: 15px;
  font-weight: 600;
}

.loader small {
  color: var(--muted);
  font-size: 12.5px;
}

.loader-bar {
  width: min(260px, 70%);
  height: 4px;
  border-radius: 4px;
  background: rgba(26, 29, 36, 0.12);
  overflow: hidden;
}

.loader-bar i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--grad);
  border-radius: 4px;
  transition: width 0.2s ease;
}

.loader .pill {
  margin-top: 4px;
}

.deck {
  display: flex;
  flex-direction: column;
  padding: 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.deck-head {
  padding: 14px 12px 12px;
}

.deck-head h3 {
  font-size: 1.35rem;
}

.deck-head p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}

.deck-list {
  flex: 1;
  overflow-y: auto;
  margin: 0;
  padding: 0;
  list-style: none;
  scrollbar-width: thin;
}

.deck-item {
  border-top: 1px solid var(--line);
}

.deck-item:first-child {
  border-top: 0;
}

.deck-btn {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 10px;
  background: none;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.deck-btn:hover:not(:disabled) {
  background: rgba(26, 29, 36, 0.035);
}

.deck-btn:disabled {
  cursor: default;
  opacity: 0.55;
}

.deck-num {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 600;
}

.deck-num.c1 { background: var(--volume-soft); color: var(--volume); }
.deck-num.c2 { background: var(--artic-soft); color: var(--artic); }
.deck-num.c3 { background: var(--curve-soft); color: var(--curve); }
.deck-num.c4 { background: var(--surface-soft); color: var(--surface); }

.deck-copy strong {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.3;
}

.deck-copy small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.35;
}

.deck-action {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(26, 29, 36, 0.055);
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.deck-item.is-active .deck-action {
  background: var(--ink);
  color: #fff;
}

.deck-panel {
  padding: 2px 12px 14px 52px;
}

.deck-panel[hidden] {
  display: none;
}

.deck-group + .deck-group {
  margin-top: 10px;
}

.deck-group > strong {
  display: block;
  margin-bottom: 2px;
  font-size: 12px;
  font-weight: 650;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.range {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 44px;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: var(--ink-2);
  min-height: 30px;
}

.range output {
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--muted);
  font-size: 12.5px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 20px;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--stage-a), var(--surface), var(--volume));
}

input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--stage-a), var(--surface), var(--volume));
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -6px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--ink);
}

.deck-foot {
  display: flex;
  gap: 8px;
  padding: 10px 6px 6px;
  border-top: 1px solid var(--line);
}

.deck-foot .tool-btn {
  flex: 1;
  height: 38px;
}

/* ---------- Method ---------- */

.stages {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.stage-card {
  position: relative;
  padding: 24px 22px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.stage-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--accent, var(--stage-a));
}

.stage-card.a { --accent: var(--stage-a); }
.stage-card.b { --accent: var(--stage-b); }
.stage-card.c { --accent: var(--stage-c); }

.stage-letter {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
}

.stage-card h3 {
  font-size: 1.28rem;
}

.stage-card ul {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.stage-card li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.55;
}

.stage-card li + li {
  margin-top: 9px;
}

.stage-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.stage-card li strong {
  color: var(--ink);
}

.codims {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.codim {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.codim-art {
  display: grid;
  place-items: center;
  height: 150px;
  background: var(--soft);
  border-bottom: 1px solid var(--line);
}

.codim-art svg {
  width: 190px;
  height: 120px;
}

.codim.curve { --c: var(--curve); --soft: var(--curve-soft); }
.codim.surface { --c: var(--surface); --soft: var(--surface-soft); }
.codim.volume { --c: var(--volume); --soft: var(--volume-soft); }

.codim-body {
  padding: 20px 22px 22px;
}

.codim-body h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 1.4rem;
}

.codim-body h3 small {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c);
}

.codim-examples {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13.5px;
}

.codim dl {
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 9px 12px;
  font-size: 14px;
  line-height: 1.5;
}

.codim dt {
  color: var(--muted);
  font-weight: 550;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  padding-top: 1px;
}

.codim dd {
  margin: 0;
  color: var(--ink-2);
}

/* Behavioral verification loop */

.loop {
  margin-top: 28px;
  padding: 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.loop-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 30px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.loop-step {
  position: relative;
  padding: 16px 16px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fcfbf8;
}

.loop-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -24px;
  width: 18px;
  height: 18px;
  transform: translateY(-50%);
  background: no-repeat center / 18px 18px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239aa0ad' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14M13 6l6 6-6 6'/%3E%3C/svg%3E");
}

.loop-step .k {
  display: block;
  margin-bottom: 6px;
  color: var(--stage-c);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.loop-step strong {
  display: block;
  font-size: 15px;
  line-height: 1.3;
}

.loop-step p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.loop-outcomes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 16px;
  margin-top: 18px;
}

.outcome {
  padding: 16px 18px;
  border-radius: 12px;
}

.outcome.pass {
  background: var(--volume-soft);
}

.outcome.fail {
  background: #fdf1ea;
}

.outcome h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
}

.outcome.pass h4 { color: var(--volume); }
.outcome.fail h4 { color: var(--curve); }

.outcome p {
  margin: 6px 0 0;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.55;
}

.ladder {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: ladder;
}

.ladder li {
  counter-increment: ladder;
  position: relative;
  padding: 10px 10px 10px 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-2);
}

.ladder li::before {
  content: counter(ladder);
  position: absolute;
  left: 10px;
  top: 10px;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--curve);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.ladder li:last-child {
  background: #fff;
  box-shadow: inset 0 0 0 1.5px var(--curve);
}

.ladder li strong {
  display: block;
  color: var(--ink);
  font-size: 13px;
}

/* ---------- Tables ---------- */

.table-card {
  margin-top: 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 10px 12px;
  text-align: center;
  white-space: nowrap;
}

thead th {
  font-weight: 650;
  font-size: 12.5px;
  color: var(--ink-2);
  background: #faf9f6;
  border-bottom: 1px solid var(--line);
}

thead tr.group th {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 0;
  padding-bottom: 2px;
}

thead tr.group th span {
  display: block;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-2);
}

tbody td {
  border-bottom: 1px solid #f0ede6;
  color: var(--ink-2);
}

tbody tr:last-child td {
  border-bottom: 0;
}

th.l,
td.l {
  text-align: left;
}

td.method {
  font-weight: 550;
  color: var(--ink);
}

tr.ours td {
  background: rgba(108, 86, 194, 0.045);
}

tr.ours td.method {
  font-weight: 700;
}

td.dataset {
  font-weight: 650;
  color: var(--ink);
  vertical-align: middle;
  background: #fcfbf9;
  border-right: 1px solid var(--line);
}

tr.divider td {
  border-top: 2px solid var(--line);
}

td.b1 {
  background: var(--best) !important;
  font-weight: 700;
  color: var(--ink);
}

td.b2 {
  background: var(--second) !important;
  font-weight: 600;
}

.yes {
  color: var(--volume);
  font-weight: 700;
}

.no {
  color: #c4574a;
  font-weight: 700;
  opacity: 0.8;
}

.table-caption {
  margin: 0;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
  background: #fcfbf9;
}

.table-caption strong {
  color: var(--ink-2);
}

.legend {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-right: 10px;
  white-space: nowrap;
}

.legend i {
  width: 14px;
  height: 10px;
  border-radius: 3px;
}

.legend .l1 { background: var(--best); }
.legend .l2 { background: var(--second); box-shadow: inset 0 0 0 1px rgba(35, 128, 108, 0.2); }

/* ---------- Qualitative tabs ---------- */

.qual-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 26px;
}

.qual-head .chips {
  flex: 1;
}

.chip-group-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  align-self: center;
  margin: 0 4px 0 6px;
}

.chip-group-label:first-child {
  margin-left: 0;
}

.qual-figure .figure-frame {
  min-height: 120px;
}

.qual-figure img {
  transition: opacity 0.2s ease;
}

.qual-figure img.is-loading {
  opacity: 0.35;
}

/* ---------- 3D scene gallery ---------- */

.gallery {
  margin-top: 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.gallery-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px 20px;
  padding: 20px 22px 16px;
}

.gallery-top h3 {
  font-size: 1.45rem;
}

.gallery-top p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.gallery-meta {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.gallery-stage {
  position: relative;
  aspect-ratio: 16 / 8.6;
  min-height: 380px;
  background: #dedbd2;
}

.gallery-canvas {
  position: absolute;
  inset: 0;
}

.gallery-canvas canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  touch-action: none;
  cursor: grab;
}

.gallery-stage .loader {
  background: rgba(222, 219, 210, 0.9);
}

.gallery-stage .stage-toolbar {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  border: 1px solid rgba(26, 29, 36, 0.07);
  border-radius: 999px;
  padding: 6px 6px 6px 16px;
  background: rgba(255, 255, 255, 0.82);
}

.hover-dot {
  position: absolute;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -9px;
  border-radius: 50%;
  border: 2px solid #fff;
  background: var(--curve);
  box-shadow: 0 0 0 4px rgba(200, 102, 47, 0.28), 0 2px 8px rgba(0, 0, 0, 0.25);
  pointer-events: none;
  display: none;
}

.hover-dot.is-visible {
  display: block;
}

.inspect {
  position: absolute;
  z-index: 4;
  width: min(320px, calc(100% - 24px));
  padding: 16px 16px 12px;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
}

.inspect[hidden] {
  display: none;
}

.inspect .eyebrow {
  font-size: 10.5px;
  margin-bottom: 2px;
}

.inspect h4 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
}

.inspect span {
  display: block;
  color: var(--muted);
  font-size: 12.5px;
}

.inspect-preview {
  position: relative;
  margin-top: 10px;
  height: 180px;
  border-radius: 10px;
  overflow: hidden;
  background: #d3a88b;
  background: linear-gradient(160deg, #efece6, #dcd7cc);
}

.inspect-preview canvas {
  width: 100% !important;
  height: 100% !important;
  cursor: grab;
}

.inspect small {
  display: block;
  margin-top: 8px;
  color: var(--faint);
  font-size: 11.5px;
  text-align: center;
}

.inspect-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 50%;
  background: rgba(26, 29, 36, 0.06);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.inspect-close:hover {
  background: rgba(26, 29, 36, 0.12);
}

.scene-picker {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--line);
  background: #faf9f6;
}

.scene-thumb {
  position: relative;
  display: block;
  padding: 0;
  border: 2px solid transparent;
  border-radius: 12px;
  overflow: hidden;
  background: #2a2d33;
  cursor: pointer;
  aspect-ratio: 4 / 3;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.scene-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.86;
  transition: opacity 0.15s ease, transform 0.3s ease;
}

.scene-thumb:hover img {
  opacity: 1;
  transform: scale(1.03);
}

.scene-thumb span {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 7px;
  color: #fff;
  font-size: 12.5px;
  font-weight: 600;
  text-align: left;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
  line-height: 1.25;
}

.scene-thumb span small {
  display: block;
  font-weight: 500;
  font-size: 11px;
  opacity: 0.85;
}

.scene-thumb[aria-selected="true"] {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(26, 29, 36, 0.12);
}

.scene-thumb[aria-selected="true"] img {
  opacity: 1;
}

/* ---------- Physical-property inspector ---------- */

.phys {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 16px;
  margin-top: 34px;
  align-items: stretch;
}

.phys-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius);
  background: #dfe2da;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  min-height: 680px;
}

.phys-canvas {
  position: relative;
  flex: 1;
  min-height: 480px;
}

.phys-canvas canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  touch-action: none;
  cursor: grab;
}

.phys-canvas .stage-hover {
  z-index: 2;
}

.phys-toolbar {
  flex-wrap: wrap;
}

.phys-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.phys-filter-label {
  margin-right: 2px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
}

.phys-chip {
  --c: var(--ink);
  --c-soft: rgba(26, 29, 36, 0.06);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 11px 0 9px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-2);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.phys-chip::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c);
}

.phys-chip small {
  color: var(--muted);
  font-weight: 500;
}

.phys-chip:hover:not(:disabled) {
  border-color: var(--c);
}

.phys-chip[aria-pressed="true"] {
  background: var(--c-soft);
  border-color: var(--c);
  color: var(--c);
}

.phys-chip:disabled {
  opacity: 0.5;
  cursor: default;
}

.phys-chip.artic { --c: var(--artic); --c-soft: var(--artic-soft); }
.phys-chip.curve { --c: var(--curve); --c-soft: var(--curve-soft); }
.phys-chip.surface { --c: var(--surface); --c-soft: var(--surface-soft); }
.phys-chip.volume { --c: var(--volume); --c-soft: var(--volume-soft); }

.phys-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  max-height: 740px;
  overflow-y: auto;
  padding: 22px 22px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  scrollbar-width: thin;
}

.phys-name {
  font-size: 1.6rem;
  line-height: 1.15;
}

.phys-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.phys-tags:empty {
  display: none;
}

.tag.rigid { background: rgba(26, 29, 36, 0.06); color: var(--ink-2); }
.tag.static { background: rgba(26, 29, 36, 0.04); color: var(--muted); }

.phys-facts {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 5px 14px;
  margin: 14px 0 0;
  font-size: 14px;
}

.phys-facts:empty {
  display: none;
}

.phys-facts dt,
.phys-rows dt {
  color: var(--muted);
}

.phys-facts dd,
.phys-rows dd {
  margin: 0;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.phys-facts dd small,
.phys-rows dd small {
  color: var(--faint);
  font-size: 12px;
}

.phys-preview {
  position: relative;
  flex-shrink: 0;
  height: 250px;
  margin-top: 16px;
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(160deg, #f3f1ec, #e2ded5);
}

.phys-preview:fullscreen {
  height: 100%;
  border-radius: 0;
}

.phys-preview canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  cursor: grab;
}

.phys-preview-btns {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  display: flex;
  gap: 6px;
}

.phys-pbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  padding: 0 11px;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink-2);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.phys-pbtn[hidden] {
  display: none;
}

.phys-pbtn:hover {
  border-color: var(--ink-2);
}

.phys-pbtn[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.phys-pbtn.is-icon {
  width: 30px;
  padding: 0;
}

.phys-pbtn svg {
  width: 14px;
  height: 14px;
}

.phys-overlay-note {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  z-index: 2;
  margin: 0;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink-2);
  font-size: 12px;
  line-height: 1.4;
}

.phys-overlay-note[hidden] {
  display: none;
}

.phys-sections > section {
  margin-top: 18px;
}

.phys-sections h4 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.phys-rows {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  margin: 0;
  font-size: 13.5px;
}

.phys-joints {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.phys-joints td {
  padding: 5px 8px 5px 0;
  border-top: 1px solid var(--line);
  border-bottom: 0;
  color: var(--ink);
  text-align: left;
  white-space: normal;
  vertical-align: top;
  font-variant-numeric: tabular-nums;
}

.phys-joints td:last-child {
  padding-right: 0;
}

.phys-joints tr:first-child td {
  border-top: 0;
}

.phys-joints td:first-child {
  font-family: var(--mono);
  font-size: 12px;
  word-break: break-all;
}

.phys-joints td:nth-child(2) {
  color: var(--muted);
  white-space: nowrap;
}

.phys-joints small {
  display: block;
  color: var(--faint);
  font-family: var(--sans);
  font-size: 11.5px;
}

.phys-comp {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.phys-comp + .phys-comp {
  margin-top: 8px;
}

.phys-comp.is-hit {
  border-color: var(--ink-2);
  box-shadow: 0 0 0 3px rgba(26, 29, 36, 0.08);
}

.phys-comp-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.phys-comp-head strong {
  font-size: 14px;
}

.phys-note {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12px;
  line-height: 1.5;
}

/* ---------- Deformable videos ---------- */

.video-filter {
  margin-top: 26px;
}

.videos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  margin-top: 20px;
}

.video-card {
  flex: 0 0 calc((100% - 3 * 18px) / 4);
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.video-card[hidden] {
  display: none;
}

.video-shell {
  position: relative;
  aspect-ratio: 1 / 1;
  background: #eceae4;
}

.video-shell video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-body {
  padding: 14px 16px 16px;
}

.video-body .tag {
  margin-bottom: 8px;
}

.video-body h4 {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.25;
}

.video-body p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}

/* Simulation strips */

.sim-strips {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.sim-strip {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 14px 14px 14px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.sim-strip img {
  width: 100%;
  border-radius: 8px;
}

.sim-strip h4 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 8px;
}

.sim-strip p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

/* Paper folding */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
  gap: 26px;
  margin-top: 30px;
  align-items: start;
}

.split > .figure {
  margin-top: 0;
}

.compare {
  display: grid;
  gap: 12px;
}

.compare-row {
  padding: 16px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.compare-row header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.compare-row h4 {
  font-size: 14.5px;
}

.compare-row .big {
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1;
}

.compare-row .big small {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--muted);
  margin-left: 4px;
}

.bar {
  position: relative;
  height: 10px;
  margin-top: 12px;
  border-radius: 10px;
  background: #efece5;
  overflow: hidden;
}

.bar i {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 10px;
  width: 0;
  transition: width 1.1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.bar.elastic i { background: #b9bec8; }
.bar.plastic i { background: linear-gradient(90deg, var(--surface), var(--volume)); }

.compare-row p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12.5px;
}

.compare .table-card {
  margin-top: 0;
}

.compare table {
  font-size: 13px;
}

.compare th,
.compare td {
  padding: 8px 10px;
}

details.more {
  margin-top: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

details.more > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 15px;
}

details.more > summary::-webkit-details-marker {
  display: none;
}

details.more > summary small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-weight: 500;
  font-size: 13px;
}

details.more > summary::after {
  content: "";
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(26, 29, 36, 0.06) no-repeat center / 12px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23303542' stroke-width='2.6' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  transition: transform 0.2s ease;
}

details.more[open] > summary::after {
  transform: rotate(180deg);
}

details.more .table-scroll {
  border-top: 1px solid var(--line);
}

details.more td {
  white-space: normal;
  text-align: left;
  vertical-align: top;
  font-size: 13.5px;
  line-height: 1.5;
}

details.more td:first-child,
details.more td:nth-child(3),
details.more td:last-child {
  white-space: nowrap;
}

details.more th {
  text-align: left;
}

/* Rest-shape + ablation layouts */

.media-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 26px;
  align-items: center;
  margin-top: 30px;
}

.media-row .figure {
  margin: 0;
}

.media-row h3 {
  font-size: 1.45rem;
}

.media-row p {
  margin-top: 10px;
  color: var(--ink-2);
  font-size: 15.5px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.fact {
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.fact strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.1;
}

.fact span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.4;
}

.ablation {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  gap: 26px;
  margin-top: 30px;
  align-items: start;
}

.ablation .figure {
  margin: 0;
}

.ablation-right {
  display: grid;
  gap: 16px;
}

.ablation-right .table-card {
  margin-top: 0;
}

.delta {
  font-size: 11.5px;
  font-weight: 600;
  margin-left: 4px;
}

.delta.bad { color: #c4574a; }
.delta.neutral { color: var(--faint); }

.note-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.note-list li {
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.55;
}

.note-list li strong {
  color: var(--ink);
}

/* ---------- BibTeX & footer ---------- */

.bibtex {
  position: relative;
  margin-top: 26px;
}

.bibtex pre {
  margin: 0;
  padding: 22px 24px;
  overflow-x: auto;
  background: #16181e;
  color: #e6e3dc;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  box-shadow: var(--shadow-lg);
}

.bibtex pre code {
  padding: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.bibtex .copy {
  position: absolute;
  top: 12px;
  right: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.bibtex .copy:hover {
  background: rgba(255, 255, 255, 0.16);
}

.bibtex .copy svg {
  width: 14px;
  height: 14px;
}

.ack p {
  margin-top: 22px;
  color: var(--ink-2);
  font-size: 15.5px;
}

.footer {
  margin-top: 88px;
  padding: 30px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
}

.footer a {
  color: var(--ink-2);
}

/* ---------- Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: rgba(18, 20, 26, 0.86);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  cursor: zoom-out;
}

.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
}

/* ---------- Reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .bar i {
    transition: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .reel-label small {
    display: none;
  }
  .nav-links a {
    padding: 6px 8px;
    font-size: 13.5px;
  }
  .explore,
  .phys {
    grid-template-columns: minmax(0, 1fr);
  }
  .deck,
  .phys-panel {
    max-height: none;
  }
  .deck-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 8px;
  }
  .deck-item:nth-child(2) {
    border-top: 0;
  }
  .video-card {
    flex-basis: calc((100% - 2 * 18px) / 3);
  }
  .loop-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .loop-step:nth-child(2)::after {
    display: none;
  }
  .ladder {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .nav-links {
    display: none;
  }
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .stages,
  .codims {
    grid-template-columns: minmax(0, 1fr);
  }
  .codim {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
  }
  .codim-art {
    height: auto;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .split,
  .media-row,
  .ablation {
    grid-template-columns: minmax(0, 1fr);
  }
  .loop-outcomes {
    grid-template-columns: minmax(0, 1fr);
  }
  .scene-picker {
    grid-template-columns: repeat(5, minmax(120px, 1fr));
    overflow-x: auto;
  }
  .video-card {
    flex-basis: calc((100% - 18px) / 2);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }
  .container {
    padding: 0 16px;
  }
  .hero {
    padding-top: 36px;
  }
  .title-sub {
    font-size: 0.66em;
  }
  .authors {
    font-size: 16px;
    gap: 2px 14px;
  }
  .affiliations {
    font-size: 14px;
  }
  .links {
    gap: 8px;
  }
  .pill {
    height: 38px;
    padding: 0 14px 0 12px;
    font-size: 13.5px;
  }
  .reel {
    grid-template-columns: repeat(3, 72%);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    margin-left: -16px;
    margin-right: -16px;
    padding: 0 16px 8px;
    scrollbar-width: none;
  }
  .reel::-webkit-scrollbar {
    display: none;
  }
  .reel-item {
    scroll-snap-align: center;
  }
  .section {
    padding-top: 64px;
  }
  .section.band {
    margin-top: 56px;
    padding: 64px 0 68px;
  }
  .figure-frame {
    padding: 10px;
    border-radius: 12px;
  }
  .stats {
    gap: 10px;
  }
  .stat {
    padding: 14px;
  }
  .stat-value {
    font-size: 1.6rem;
  }
  .stage {
    min-height: 0;
  }
  .stage-canvas,
  .phys-canvas {
    min-height: 0;
    aspect-ratio: 1 / 1;
    flex: none;
  }
  .phys-stage {
    min-height: 0;
  }
  .phys-panel {
    padding: 18px 16px 14px;
  }
  .stage-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .stage-toolbar .hint {
    display: none;
  }
  .tool-btns .tool-btn {
    flex: 1;
  }
  .stage-stamp {
    display: none;
  }
  .deck-list {
    grid-template-columns: minmax(0, 1fr);
  }
  .deck-item:nth-child(2) {
    border-top: 1px solid var(--line);
  }
  .deck-panel {
    padding-left: 12px;
  }
  .codim {
    grid-template-columns: minmax(0, 1fr);
  }
  .codim-art {
    height: 130px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .codim dl {
    grid-template-columns: 84px minmax(0, 1fr);
  }
  .loop {
    padding: 16px;
  }
  .loop-flow,
  .ladder {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }
  .ladder {
    gap: 8px;
  }
  .loop-step:not(:last-child)::after {
    display: block !important;
    top: auto;
    bottom: -23px;
    right: 50%;
    transform: translateX(50%) rotate(90deg);
  }
  .gallery-top {
    padding: 16px;
  }
  .gallery-meta {
    text-align: left;
  }
  .gallery-stage {
    aspect-ratio: 1 / 1;
    min-height: 0;
  }
  .gallery-stage .stage-toolbar {
    border-radius: 14px;
    flex-direction: row;
    align-items: center;
    padding: 6px 6px 6px 12px;
  }
  .gallery-stage .stage-toolbar .hint {
    display: inline-flex;
    font-size: 11.5px;
  }
  .scene-picker {
    grid-template-columns: repeat(5, 132px);
    padding: 10px;
  }
  .qual-head .chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    margin: 0 -16px;
    padding: 2px 16px 6px;
    scrollbar-width: none;
  }
  .qual-head .chips::-webkit-scrollbar {
    display: none;
  }
  .qual-head .chip {
    flex-shrink: 0;
  }
  .qual-head > .hint {
    display: none;
  }
  .video-card {
    flex-basis: 100%;
  }
  .sim-strip {
    grid-template-columns: minmax(0, 1fr);
    padding: 14px;
    gap: 10px;
  }
  .facts {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  th,
  td {
    padding: 8px 9px;
  }
  .bibtex pre {
    font-size: 12px;
    padding: 52px 16px 18px;
  }
}