/* Personality-Aware Non-verbal Behavior Generation: thesis site
   Dark ground matches the dark-panel figures. Amber = extrovert, steel blue = introvert. */

/* Self-hosted fonts (no third-party requests). Licensed under the SIL Open Font License. */
@font-face {
  font-family: "Schibsted Grotesk"; font-style: normal; font-weight: 400 900; font-display: swap;
  src: url("../fonts/schibsted-grotesk-latin-wght-normal.woff2") format("woff2-variations");
}
@font-face {
  font-family: "Source Serif 4"; font-style: normal; font-weight: 200 900; font-display: swap;
  src: url("../fonts/source-serif-4-latin-opsz-normal.woff2") format("woff2-variations");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("../fonts/jetbrains-mono-latin-400-normal.woff2") format("woff2");
}

:root {
  --ground: #16181d;
  --surface: #1e2128;
  --surface-2: #252932;
  --line: #31353f;
  --text: #e8e5dd;
  --muted: #9b9da4;
  --extro: #e3a15e;
  --intro: #80a7c8;
  --link: #a9c6de;

  --sans: "Schibsted Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --side-w: 272px;
  --measure: 40rem;   /* ~70 characters of serif body */
  --wide: 58rem;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 1.5rem; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.1rem;
  line-height: 1.65;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--text); }
:focus-visible { outline: 2px solid var(--extro); outline-offset: 3px; border-radius: 3px; }

.skip { position: absolute; left: -999px; top: 0; z-index: 100; background: var(--extro); color: #16181d; padding: .5rem .8rem; font-family: var(--sans); }
.skip:focus { left: .5rem; top: .5rem; }

/* ---------- sidebar ---------- */
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: var(--side-w);
  background: var(--surface);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  font-family: var(--sans);
  z-index: 20;
}
.side-inner { padding: 2rem 1.6rem 1.6rem; display: flex; flex-direction: column; min-height: 100%; }
.portrait {
  width: 132px; height: 132px; object-fit: cover; object-position: 50% 18%;
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--surface), 0 0 0 4px var(--line);
}
.side-name { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.01em; margin: 1.1rem 0 .25rem; }
.side-about { color: var(--muted); font-size: .92rem; line-height: 1.5; margin: 0 0 1.1rem; }
.side-links { list-style: none; padding: 0; margin: 0 0 1.8rem; font-size: .9rem; display: grid; gap: .35rem; }
.side-links a { color: var(--text); text-decoration: none; border-bottom: 1px solid var(--line); word-break: break-word; }
.side-links a:hover { border-color: var(--extro); }

.toc-title { font-size: .85rem; color: var(--muted); margin: 0 0 .5rem; font-weight: 500; }
.toc ol { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--line); }
.toc a {
  display: block; padding: .32rem 0 .32rem .9rem; margin-left: -1px;
  color: var(--muted); text-decoration: none; font-size: .98rem; font-weight: 500;
  border-left: 2px solid transparent;
}
.toc a:hover { color: var(--text); }
.toc a[aria-current="true"] { color: var(--text); border-left-color: var(--extro); }

.side-note { margin-top: auto; padding-top: 2rem; color: var(--muted); font-size: .78rem; line-height: 1.5; }

.topbar { display: none; }

/* ---------- main column ---------- */
main { margin-left: var(--side-w); }
.col { max-width: var(--wide); margin: 0 auto; padding: 4.5rem 3rem 3rem; }
.col > header, .col > section, .col > footer { max-width: var(--measure); }
.wide { width: min(var(--wide), 100%); }
.col > section > .wide, .col > header > .wide { width: calc(min(var(--wide), 100vw - var(--side-w) - 6rem)); max-width: none; }

/* ---------- type ---------- */
h1, h2, h3, h4 { font-family: var(--sans); color: var(--text); line-height: 1.15; }
h1 {
  font-size: clamp(2rem, 1.1rem + 2.4vw, 3.1rem);
  font-weight: 750; letter-spacing: -0.025em; line-height: 1.06;
  margin: 0 0 1.1rem; max-width: 21ch;
  hyphens: manual;
  text-wrap: balance;
}
h2 {
  font-size: 2rem; font-weight: 700; letter-spacing: -0.02em;
  margin: 5rem 0 1.2rem; padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}
h3 { font-size: 1.32rem; font-weight: 650; letter-spacing: -0.01em; margin: 2.8rem 0 .8rem; }
h4 { font-size: 1.05rem; font-weight: 650; margin: 1.8rem 0 .4rem; }
p { margin: 0 0 1.05rem; }
strong { font-weight: 600; color: #f4f1ea; }
code { font-family: var(--mono); font-size: .84em; background: var(--surface-2); padding: .08em .35em; border-radius: 4px; }

.byline { font-family: var(--sans); color: var(--muted); font-size: 1rem; margin: 0 0 1.4rem; }
.lede { font-size: 1.28rem; line-height: 1.5; color: var(--text); margin-bottom: 2.4rem; max-width: 36rem; }

ul, ol { padding-left: 1.3rem; margin: 0 0 1.1rem; }
li { margin-bottom: .55rem; }
li::marker { color: var(--muted); font-family: var(--sans); font-weight: 600; }

.source-note { font-family: var(--sans); font-size: .85rem; color: var(--muted); margin-top: 1.4rem; }
.source-note a { color: var(--muted); }
.source-note a:hover { color: var(--text); }
.hint { font-family: var(--sans); font-size: .9rem; color: var(--muted); }

/* ---------- media ---------- */
figure { margin: 2rem 0; }
figcaption { font-family: var(--sans); font-size: .88rem; color: var(--muted); margin-top: .6rem; }

.intro-video video { width: 100%; border-radius: 10px; border: 1px solid var(--line); background: #000; aspect-ratio: 16 / 9; }

/* the one bold element: avatars on a personality spectrum */
.teaser { margin: 1.6rem 0 2.2rem; }
.teaser video { width: 100%; background: #000; border-radius: 10px 10px 0 0; aspect-ratio: 700 / 240; }
.spectrum {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: .7rem .2rem 0; position: relative;
  font-family: var(--sans); font-size: .85rem; font-weight: 500; color: var(--muted);
}
.spectrum::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 5px;
  background: linear-gradient(90deg, var(--extro) 0%, var(--extro) 18%, #b7aea2 50%, var(--intro) 82%, var(--intro) 100%);
  border-radius: 0 0 4px 4px;
}
.spectrum span:first-child { color: var(--extro); }
.spectrum span:last-child { color: var(--intro); }

.cmp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem 1.2rem; margin: 2rem 0 .6rem; }
.cmp { margin: 0; }
.cmp video { width: 100%; aspect-ratio: 3 / 1; background: #000; border-radius: 8px; border: 1px solid var(--line); }
.cmp figcaption { margin-top: .4rem; }

.fig .zoom {
  display: block; width: 100%; padding: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
  background: #121212; cursor: zoom-in;
}
.fig .zoom img { width: 100%; }
.fig.narrow { max-width: 34rem; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: .4rem 0 1.4rem; }
.pair .fig { margin: 0; }

/* ---------- lists of steps ---------- */
.steps > li { padding-left: .2rem; }
ol.task { margin-top: 1.8rem; }
ol.task > li { margin-bottom: .6rem; }
.sub-item { margin: 1.2rem 0 1.4rem 1.3rem; padding-left: 1rem; border-left: 1px solid var(--line); }
.sub-item > p:first-child { margin-bottom: .6rem; }

.tags { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0 0 1.4rem; }
.tags li { margin: 0; font-family: var(--sans); font-size: .85rem; padding: .2rem .6rem; border: 1px solid var(--line); border-radius: 999px; color: var(--text); }

/* ---------- results table ---------- */
.table-wrap { overflow-x: auto; margin: 1.6rem 0 2rem; border: 1px solid var(--line); border-radius: 10px; }
.col > section > .table-wrap { width: calc(min(var(--wide), 100vw - var(--side-w) - 6rem)); }
table.results { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: .92rem; min-width: 44rem; }
.results caption { caption-side: bottom; text-align: left; padding: .7rem 1rem; color: var(--muted); font-size: .82rem; border-top: 1px solid var(--line); }
.results th, .results td { padding: .65rem .8rem; text-align: right; white-space: nowrap; }
.results td { font-variant-numeric: tabular-nums; }
.results thead tr:last-child th:first-child { text-align: left; }
.results thead th { font-weight: 600; color: var(--muted); border-bottom: 1px solid var(--line); }
.results thead tr:first-child th { color: var(--text); text-align: center; border-bottom: 1px solid var(--line); }
.results thead tr:first-child th + th, .results tbody td:nth-child(6), .results thead tr:last-child th:nth-child(6) { border-left: 1px solid var(--line); }
.results tbody th { text-align: left; font-weight: 500; }
.results tbody tr + tr { border-top: 1px solid var(--line); }
.results td.best { font-weight: 700; color: #fff; }
.results tr.ours { background: color-mix(in srgb, var(--extro) 11%, transparent); }
.results tr.ours th { font-weight: 700; color: var(--extro); }

/* ---------- user study bars ---------- */
.bars { margin: 1.8rem 0 2.2rem; font-family: var(--sans); }
.bar-row { margin-bottom: 1.1rem; }
.bar-label { font-size: .95rem; margin-bottom: .35rem; }
.bar-track { position: relative; display: flex; align-items: center; gap: .7rem; }
.bar { height: 14px; width: var(--v); border-radius: 0 7px 7px 0; }
.bar.extro { background: var(--extro); }
.bar.intro { background: var(--intro); }
.bar-val { font-weight: 700; font-size: 1.05rem; }
.bars figcaption { margin-top: .2rem; }

/* ---------- code blocks ---------- */
.code-block { margin: .8rem 0 1.6rem; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); font-family: var(--sans); }
.code-block > summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: .7rem;
  padding: .7rem 1rem; font-size: .95rem; font-weight: 500;
}
.code-block > summary::-webkit-details-marker { display: none; }
.code-block > summary::before {
  content: ""; width: .5rem; height: .5rem; flex: none;
  border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg); transition: transform .15s ease;
}
.code-block[open] > summary::before { transform: rotate(45deg); }
.code-block > summary:hover { color: #fff; }
.code-block .loc { margin-left: auto; color: var(--muted); font-size: .82rem; font-weight: 400; }
.code-body { border-top: 1px solid var(--line); }
.code-notes { padding: 1rem 1.2rem .2rem; font-family: var(--serif); font-size: 1rem; }
.code-notes h4, .code-notes h5 { font-family: var(--sans); font-size: 1rem; margin: .6rem 0 .4rem; }
.code-notes hr { border: 0; border-top: 1px solid var(--line); margin: 1.2rem 0; }
.code-wrap { position: relative; }
.code-wrap pre {
  margin: 0; max-height: 34rem; overflow: auto; padding: 1rem 1.2rem;
  background: #13151a; border-radius: 0 0 10px 10px;
  font-family: var(--mono); font-size: .8rem; line-height: 1.6; tab-size: 4;
}
.code-wrap pre code { background: none; padding: 0; font-size: inherit; color: #d7d4cc; }
.copy {
  position: absolute; top: .6rem; right: 1.4rem; z-index: 1;
  font-family: var(--sans); font-size: .8rem; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: .25rem .6rem; cursor: pointer;
}
.copy:hover { border-color: var(--muted); }

/* highlight.js tokens, tuned to the palette */
.hljs-keyword, .hljs-built_in.hljs-keyword, .hljs-literal { color: #c9a0dc; }
.hljs-string, .hljs-regexp { color: #b5cf8f; }
.hljs-number { color: var(--extro); }
.hljs-comment { color: #757983; font-style: italic; }
.hljs-title.function_, .hljs-title.class_, .hljs-title { color: var(--intro); }
.hljs-built_in { color: #e6c07b; }
.hljs-params { color: #d7d4cc; }
.hljs-meta, .hljs-decorator { color: #9b9da4; }
.hljs-subst { color: #d7d4cc; }

/* ---------- footer ---------- */
.foot { margin-top: 5rem; padding-top: 1.4rem; border-top: 1px solid var(--line); font-family: var(--sans); font-size: .85rem; color: var(--muted); }
.foot p { margin: 0 0 .4rem; }
.foot a { color: var(--muted); }

/* ---------- lightbox ---------- */
.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 94vh; overflow: visible; }
.lightbox::backdrop { background: rgba(8, 9, 12, .9); }
.lightbox img { max-width: 96vw; max-height: 88vh; width: auto; border-radius: 8px; background: #121212; cursor: zoom-out; }
.lb-close {
  display: block; margin: 0 0 .6rem auto;
  font-family: var(--sans); font-size: .9rem; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: .35rem .8rem; cursor: pointer;
}

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  :root { --side-w: 240px; }
  .col { padding: 3.5rem 2rem 2.5rem; }
  .col > section > .wide, .col > header > .wide, .col > section > .table-wrap { width: calc(min(var(--wide), 100vw - var(--side-w) - 4rem)); }
}

@media (max-width: 860px) {
  body { font-size: 1.05rem; }
  .topbar {
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 30;
    padding: .7rem 16px; background: rgba(22, 24, 29, .94); backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line); font-family: var(--sans);
  }
  .topbar-name { color: var(--text); text-decoration: none; font-weight: 700; }
  .menu-btn { font-family: var(--sans); font-size: .9rem; color: var(--text); background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: .35rem .8rem; cursor: pointer; }
  .sidebar { transform: translateX(-100%); transition: transform .2s ease; width: min(300px, 86vw); top: 0; box-shadow: none; z-index: 40; }
  body.menu-open .sidebar { transform: none; box-shadow: 0 0 0 100vmax rgba(8, 9, 12, .6); }
  main { margin-left: 0; }
  html { scroll-padding-top: 4rem; }
  .col { padding: 2.2rem 16px 2rem; }
  .col > section > .wide, .col > header > .wide, .col > section > .table-wrap { width: 100%; }
  h2 { margin-top: 3.6rem; font-size: 1.7rem; }
  .lede { font-size: 1.15rem; }
  .cmp-grid, .pair { grid-template-columns: 1fr; }
  .sub-item { margin-left: .3rem; padding-left: .8rem; }
  .spectrum { font-size: .78rem; }
  .copy { right: .8rem; }
}