/* A filmstrip of video frames, with a quiet reading area below. */
:root {
  --ink: #20212b;
  --muted: #696b77;
  --purple: #6559cf;
  --line: #e8e8ed;
}

.nav {
  min-height: 66px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.4px;
}

.wordmark img {
  display: block;
  width: 25px;
  height: 25px;
}

.hero {
  padding-top: 0;
}

.hero-stage {
  position: relative;
  display: grid;
  place-items: center;
  isolation: isolate;
  width: min(100%, 1530px);
  height: clamp(480px, 45vw, 650px);
  margin-inline: auto;
  overflow: hidden;
  background: #141519;
  color: white;
}

.frame-wall {
  position: absolute;
  inset: 0 -120px;
  z-index: -3;
  display: grid;
  grid-template-rows: repeat(4, minmax(0, 1fr));
  gap: 5px;
  overflow: hidden;
  filter: saturate(.72);
}

.frame-track {
  display: flex;
  gap: 5px;
  width: max-content;
  min-height: 0;
  animation: film-drift 190s linear infinite;
  will-change: transform;
}

.frame-track:nth-child(2) {
  animation-duration: 220s;
  animation-direction: reverse;
}

.frame-track:nth-child(3) {
  animation-duration: 205s;
}

.frame-track:nth-child(4) {
  animation-duration: 235s;
  animation-direction: reverse;
}

.frame-strip {
  display: flex;
  gap: 5px;
  height: 100%;
}

.frame-strip img {
  display: block;
  flex: 0 0 auto;
  width: clamp(230px, 20vw, 285px);
  height: 100%;
  object-fit: cover;
  background: #24262b;
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse at 50% 45%, rgb(9 12 18 / 77%) 0%, rgb(9 12 18 / 53%) 44%, rgb(9 12 18 / 28%) 100%),
    linear-gradient(180deg, rgb(9 12 18 / 20%), transparent 25%, rgb(9 12 18 / 15%) 75%);
}

.hero-stage::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  z-index: -1;
  height: 106px;
  background: linear-gradient(180deg, transparent, rgb(255 255 255 / 15%) 28%, #fff 100%);
  pointer-events: none;
}

.hero-copy {
  width: min(1232px, calc(100% - 48px));
  padding-bottom: 27px;
  text-shadow: 0 2px 28px rgb(0 0 0 / 20%);
}

.hero-title {
  margin: 0;
  background: none;
  color: #fff;
  font-size: clamp(46px, 6.4vw, 98px);
  font-weight: 720;
  letter-spacing: -.055em;
  line-height: 1.12;
}

.hero-subtitle {
  margin: 27px auto 0;
  max-width: 850px;
  color: rgb(255 255 255 / 93%);
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: -.45px;
  text-wrap: balance;
}

.hero-edge {
  position: absolute;
  inset: auto 36px 112px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(1300px, calc(100% - 72px));
  margin-inline: auto;
  color: rgb(255 255 255 / 85%);
}

.hero-explore {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 500;
}

.hero-explore span {
  font-size: 18px;
}

.motion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid rgb(255 255 255 / 25%);
  border-radius: 5px;
  background: rgb(12 15 20 / 35%);
  color: inherit;
  font-size: 12.5px;
}

.motion-toggle:hover {
  background: rgb(12 15 20 / 65%);
}

.motion-toggle[hidden],
.motion-toggle .icon-play,
.hero-stage[data-paused="true"] .icon-pause {
  display: none;
}

.hero-stage[data-paused="true"] .icon-play {
  display: block;
}

.hero-stage[data-paused="true"] .frame-track,
.hero-stage[data-offscreen="true"] .frame-track {
  animation-play-state: paused;
}

.hero-details {
  --max: 1300px;
  padding-top: 25px;
  padding-bottom: 72px;
}

.hero-details .authors {
  gap: 10px 26px;
  font-size: 17px;
  font-weight: 550;
  line-height: 1.8;
}

.hero-details .affiliations {
  max-width: 1053px;
  margin-top: 16px;
  gap: 6px 25px;
  font-size: 14.5px;
  line-height: 1.8;
}

.hero-details .author-note {
  margin: 14px 0 27px;
  font-size: 13.5px;
}

.hero-details .resources {
  gap: 12px;
}

.hero-details .button {
  min-height: 50px;
  gap: 9px;
  padding: 11px 20px;
  border-radius: 6px;
  font-size: 14.5px;
  font-weight: 550;
}

.resource-icon {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
}

.resource-brand {
  width: 21px;
  height: 21px;
  object-fit: contain;
}

.github-mark {
  filter: brightness(0) invert(1);
}

.hero-details .resource-pending {
  color: #777984;
  background: #fafafa;
}

.hero-details .resource-pending small {
  display: inline;
  padding: 2px 5px;
  border-radius: 3px;
  background: #eeedf2;
  color: #747480;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

#overview {
  padding-top: 64px;
}

@keyframes film-drift {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-50% - 2.5px)); }
}

@media (max-width: 900px) {
  .hero-details .authors {
    gap: 7px 18px;
    font-size: 14px;
  }

  .hero-details .affiliations {
    font-size: 12px;
  }

  .hero-title {
    font-size: clamp(43px, 7.5vw, 64px);
  }
}

@media (max-width: 600px) {
  .nav {
    min-height: 60px;
    gap: 12px;
  }

  .wordmark {
    gap: 7px;
    font-size: 13px;
  }

  .wordmark img {
    width: 21px;
    height: 21px;
  }

  .nav nav {
    gap: 12px;
  }

  .nav nav a[href="#citation"] {
    display: none;
  }

  .hero-stage {
    height: 420px;
  }

  .frame-wall {
    inset: 0 -30px;
    gap: 3px;
  }

  .frame-track {
    gap: 3px;
    animation: none;
    will-change: auto;
  }

  .frame-strip {
    gap: 3px;
  }

  .frame-strip img {
    width: 185px;
  }

  .frame-track:nth-child(2) { transform: translateX(-225px); }
  .frame-track:nth-child(3) { transform: translateX(-90px); }
  .frame-track:nth-child(4) { transform: translateX(-360px); }

  .hero-stage::before {
    background: radial-gradient(ellipse at 50% 42%, rgb(9 12 18 / 82%), rgb(9 12 18 / 40%));
  }

  .hero-stage::after {
    height: 68px;
  }

  .hero-copy {
    width: calc(100% - 36px);
    padding-bottom: 26px;
  }

  .hero-title {
    font-size: clamp(35px, 10.5vw, 58px);
    letter-spacing: -.055em;
  }

  .hero-subtitle {
    max-width: 350px;
    margin-top: 18px;
    font-size: 18px;
    line-height: 1.55;
    letter-spacing: -.2px;
  }

  .hero-edge {
    inset: auto 18px 75px;
    width: calc(100% - 36px);
    justify-content: center;
  }

  .hero-explore {
    font-size: 11px;
  }

  .motion-toggle {
    display: none;
  }

  .hero-details {
    padding-top: 10px;
    padding-bottom: 44px;
  }

  .hero-details .authors {
    gap: 7px 15px;
    font-size: 13px;
  }

  .hero-details .affiliations {
    gap: 4px;
    margin-top: 18px;
    font-size: 11px;
  }

  .hero-details .author-note {
    font-size: 10px;
    margin-bottom: 22px;
  }

  .hero-details .resources {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: 350px;
    margin-inline: auto;
    gap: 8px;
  }

  .hero-details .button {
    padding: 10px 12px;
    font-size: 12px;
  }

  #overview {
    padding-top: 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .frame-track {
    animation: none;
    will-change: auto;
  }

  .motion-toggle {
    display: none;
  }
}