/* Video Library. The colours and fonts are the videos' own (elib's default theme). */

:root {
  --paper: #FCFBFD;
  --surface: #FFFFFF;
  --ink: #1A1523;
  --slate: #5B5566;
  --faint: #8A8298;
  --mist: #E7E3EE;
  --chip: #F1EEF5;
  --accent: #6A1B9A;
  --on-accent: #FCFBFD;
  --shadow: 0 1px 2px rgba(26, 21, 35, .06), 0 8px 24px -12px rgba(26, 21, 35, .18);
  --display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131117;
    --surface: #1B1820;
    --ink: #EEEBF2;
    --slate: #A9A2B5;
    --faint: #7E778A;
    --mist: #2C2833;
    --chip: #221F28;
    --accent: #C9A2E8;
    --on-accent: #131117;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; }
img, video { max-width: 100%; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--accent); color: var(--on-accent); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 32px; }
.wrap.narrow { max-width: 960px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

/* small mono labels: the owner, venues, section names */
.eyebrow, .meta, .label, .stats, .crumbs, .pager small {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
}

/* ---------------------------------------------------------------- index */

.masthead { padding: 104px 0 64px; }
.eyebrow { margin: 0 0 20px; color: var(--slate); }
.eyebrow a { text-decoration: none; }
.eyebrow a:hover { color: var(--accent); }
h1 {
  margin: 0;
  font: 600 clamp(44px, 7.5vw, 76px)/1 var(--display);
  letter-spacing: -.03em;
}
.intro { max-width: 54ch; margin: 24px 0 0; color: var(--slate); font-size: 18px; line-height: 1.6; }
.stats { margin: 32px 0 0; color: var(--faint); font-weight: 400; letter-spacing: .04em; }

.grid { display: grid; grid-template-columns: 1fr; gap: 64px 40px; padding: 8px 0 120px; }
@media (min-width: 780px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .masthead { padding: 64px 0 40px; } .grid { gap: 48px; padding-bottom: 80px; } }

.card { display: flex; flex-direction: column; animation: rise .7s cubic-bezier(.2, .7, .2, 1) both; }
.card:nth-child(2) { animation-delay: .06s; }
.card:nth-child(3) { animation-delay: .12s; }
.card:nth-child(4) { animation-delay: .18s; }
.card:nth-child(n+5) { animation-delay: .24s; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }

.thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  background: #FCFBFD;
  box-shadow: 0 0 0 1px var(--mist);
  transition: box-shadow .3s, transform .4s cubic-bezier(.2, .7, .2, 1);
}
.thumb img, .thumb video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.thumb video { opacity: 0; transition: opacity .4s; }
.thumb.playing video { opacity: 1; }
.card:hover .thumb { box-shadow: 0 0 0 1px var(--mist), var(--shadow); transform: translateY(-2px); }
.runtime {
  position: absolute; right: 10px; bottom: 10px;
  padding: 5px 7px;
  border-radius: 6px;
  background: rgba(26, 21, 35, .78);
  color: #FCFBFD;
  font: 500 11.5px/1 var(--mono);
  transition: opacity .3s;
}
.thumb.playing .runtime { opacity: 0; }

.card .meta { margin: 20px 0 0; color: var(--accent); }
.card h2 { margin: 8px 0 0; font: 600 21px/1.3 var(--display); letter-spacing: -.012em; }
.card h2 a { text-decoration: none; }
.card h2 a:hover { color: var(--accent); }
.authors { margin: 8px 0 0; color: var(--slate); font-size: 14.5px; }

.cuts { display: flex; flex-wrap: wrap; gap: 8px; margin: auto 0 0; padding: 18px 0 0; list-style: none; }
.cuts a {
  display: inline-flex; align-items: baseline; gap: 7px;
  padding: 8px 13px;
  border-radius: 999px;
  background: var(--chip);
  font-size: 13.5px; font-weight: 500;
  text-decoration: none;
  transition: background .2s, color .2s;
}
.cuts a span { color: var(--slate); font: 400 12px/1 var(--mono); transition: color .2s; }
.cuts a:hover { background: var(--accent); color: var(--on-accent); }
.cuts a:hover span { color: inherit; }

/* ---------------------------------------------------------------- paper page */

.crumbs { padding: 36px 0 0; }
.crumbs a { color: var(--slate); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }

.paper-head { padding: 56px 0 36px; animation: rise .6s cubic-bezier(.2, .7, .2, 1) both; }
.paper-head .meta { margin: 0; color: var(--accent); }
.paper-head h1 { margin-top: 14px; font-size: clamp(30px, 4.6vw, 46px); line-height: 1.1; letter-spacing: -.022em; }
.paper-head .authors { margin-top: 16px; font-size: 16.5px; }
@media (max-width: 640px) { .paper-head { padding: 36px 0 28px; } }

.links { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 0; padding: 0; list-style: none; }
.links a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 13px;
  border-radius: 999px;
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--mist);
  font-size: 14px; font-weight: 500;
  text-decoration: none;
  transition: background .2s, color .2s, box-shadow .2s;
}
.links a:hover { background: var(--accent); color: var(--on-accent); box-shadow: inset 0 0 0 1px var(--accent); }
.ext { width: 11px; height: 11px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; opacity: .7; }

.watch { animation: rise .6s .08s cubic-bezier(.2, .7, .2, 1) both; }
.seg {
  display: inline-flex; gap: 2px;
  max-width: 100%;
  margin: 0 0 16px; padding: 4px;
  overflow-x: auto;
  border-radius: 999px;
  background: var(--chip);
  scrollbar-width: none;
}
.seg::-webkit-scrollbar { display: none; }
.seg button {
  display: inline-flex; align-items: baseline; gap: 8px;
  padding: 9px 16px;
  border: 0; border-radius: 999px;
  background: none;
  color: var(--slate);
  font: 500 14px/1.2 var(--body);
  white-space: nowrap;
  cursor: pointer;
  transition: background .2s, color .2s, box-shadow .2s;
}
.seg button span { color: var(--faint); font: 400 12px/1 var(--mono); }
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 0 0 1px var(--mist), 0 1px 2px rgba(26, 21, 35, .06); }
@media (max-width: 640px) {
  .seg { display: flex; width: 100%; }
  .seg button { flex: 1; justify-content: center; gap: 6px; padding: 9px 6px; font-size: 13.5px; }
  .seg button span { font-size: 11px; }
}

.screen {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  background: #FCFBFD;
  box-shadow: 0 0 0 1px var(--mist), var(--shadow);
}
.screen[hidden] { display: none; }
.screen video { display: block; width: 100%; height: 100%; background: #FCFBFD; }
/* the phone cut sits upright in the same frame; on a phone it fills the width */
.screen.portrait { display: flex; justify-content: center; background: var(--chip); }
.screen.portrait[hidden] { display: none; }
.screen.portrait video { width: auto; aspect-ratio: 9 / 16; }
@media (max-width: 640px) {
  .screen.portrait { aspect-ratio: 9 / 16; }
  .screen.portrait video { width: 100%; }
}

.chapters {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0 28px;
  margin: 28px 0 0; padding: 0;
  list-style: none;
}
.chapters[hidden] { display: none; }
.chapters button {
  display: flex; gap: 14px;
  width: 100%;
  padding: 9px 0;
  border: 0; border-top: 1px solid var(--mist);
  background: none;
  color: var(--slate);
  font: 400 14.5px/1.4 var(--body);
  text-align: left;
  cursor: pointer;
  transition: color .2s;
}
.chapters time { min-width: 3.4em; color: var(--faint); font: 400 12.5px/1.65 var(--mono); transition: color .2s; }
.chapters button:hover { color: var(--ink); }
.chapters button.on, .chapters button.on time { color: var(--accent); }

.block { margin-top: 72px; }
.label { margin: 0 0 18px; color: var(--slate); }
.label-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.label-row .label { margin: 0; }
.abstract { max-width: 72ch; margin: 0; font-size: 16.5px; line-height: 1.75; }
.abstract a { color: var(--accent); text-underline-offset: 3px; word-break: break-all; }

.bib {
  margin: 0; padding: 22px 24px;
  overflow-x: auto;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: inset 0 0 0 1px var(--mist);
  font: 400 13px/1.7 var(--mono);
  white-space: pre;
}
.copy {
  padding: 7px 12px;
  border: 0; border-radius: 999px;
  background: var(--chip);
  color: var(--ink);
  font: 500 13px/1.2 var(--body);
  cursor: pointer;
  transition: background .2s, color .2s;
}
.copy:hover, .copy.done { background: var(--accent); color: var(--on-accent); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 104px 0 0; padding: 32px 0; border-top: 1px solid var(--mist); }
.pager:empty { display: none; }
.pager a { display: block; text-decoration: none; }
.pager .next { grid-column: 2; text-align: right; }
.pager small { display: block; margin-bottom: 8px; color: var(--faint); }
.pager span { font: 600 17px/1.3 var(--display); letter-spacing: -.01em; transition: color .2s; }
.pager a:hover span { color: var(--accent); }
@media (max-width: 640px) { .pager { margin-top: 72px; } .pager span { font-size: 15px; } }

/* ---------------------------------------------------------------- footer */

footer.site {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding: 28px 0 56px;
  border-top: 1px solid var(--mist);
  color: var(--faint);
  font-size: 13px;
}
.paper footer.site { border-top: 0; padding-top: 0; }
footer.site a { color: var(--slate); text-decoration: none; }
footer.site a:hover { color: var(--accent); }

/* the visitor map: rendered (so the visit is logged) but invisible */
.visitor-widget { position: fixed; right: 0; bottom: 0; width: 1px; height: 1px; overflow: hidden; opacity: 0; pointer-events: none; z-index: -1; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}