:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(29, 29, 31, 0.11);
  --nav: rgba(250, 250, 252, 0.78);
  --accent: #087c94;
  --accent-soft: rgba(8, 124, 148, 0.12);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  --card-shadow: 0 22px 55px rgba(0, 0, 0, 0.08);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --surface: rgba(28, 28, 30, 0.78);
  --surface-solid: #151517;
  --ink: #f5f5f7;
  --muted: #a1a1a6;
  --line: rgba(255, 255, 255, 0.13);
  --nav: rgba(10, 10, 11, 0.72);
  --accent: #62d3e8;
  --accent-soft: rgba(98, 211, 232, 0.14);
  --shadow: 0 34px 100px rgba(0, 0, 0, 0.48), 0 2px 8px rgba(0, 0, 0, 0.32);
  --card-shadow: 0 26px 70px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-geist-sans, -apple-system), BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.gallery {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 7%, rgba(86, 200, 219, 0.11), transparent 20rem),
    radial-gradient(circle at 14% 18%, rgba(255, 112, 88, 0.07), transparent 23rem),
    var(--bg);
  transition: background 500ms ease, background-color 500ms ease, color 500ms ease;
}

.nav-shell {
  position: sticky;
  z-index: 50;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
  min-height: 56px;
  padding: 0 max(24px, calc((100vw - 1440px) / 2));
  background: var(--nav);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
}

.nav-actions,
.nav-actions a,
.theme-toggle {
  display: flex;
  align-items: center;
}

.nav-actions {
  gap: 24px;
  color: var(--muted);
  font-size: 0.8rem;
}

.nav-actions a {
  gap: 4px;
  transition: color 180ms ease;
}

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

.theme-toggle {
  gap: 7px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  box-shadow: 0 3px 14px rgba(0, 0, 0, 0.04);
}

.theme-icon {
  color: var(--accent);
  font-size: 0.9rem;
}

.theme-toggle:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

.hero {
  width: min(1440px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(64px, 7vw, 104px) 0 clamp(68px, 7vw, 104px);
  text-align: center;
}

.hero-kicker,
.eyebrow,
.category {
  margin: 0;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero h1 {
  width: max-content;
  max-width: 100%;
  margin: 22px auto 0;
  font-size: clamp(3.1rem, 9.4vw, 9.3rem);
  font-weight: 720;
  font-kerning: normal;
  letter-spacing: -0.032em;
  line-height: 0.88;
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 42px;
  color: var(--muted);
  font-size: 0.82rem;
}

.meta-divider {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--line);
}

.collection-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.72fr);
  gap: clamp(40px, 9vw, 150px);
  align-items: center;
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
  padding: 0 0 clamp(60px, 8vw, 110px);
}

.collection-intro h2 {
  margin: 15px 0 0;
  font-size: clamp(2.6rem, 6vw, 6.1rem);
  font-weight: 650;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

.collection-intro > p {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: 1.55;
}

@media (min-width: 1100px) {
  .collection-intro > p {
    transform: translateX(-100px);
  }
}

.visualization-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: clamp(16px, 1.8vw, 26px);
  width: min(1440px, calc(100% - 48px));
  margin: 0 auto;
  padding-bottom: clamp(120px, 14vw, 220px);
}

.visualization-card {
  min-width: 0;
  display: grid;
  grid-template-rows: auto 170px;
  border-radius: clamp(16px, 1.5vw, 22px);
  background: var(--surface);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform 480ms cubic-bezier(0.2, 0.8, 0.2, 1), border-color 250ms ease, background 350ms ease;
}

.visualization-card.featured {
  grid-column: auto;
}

.visualization-card:hover {
  transform: translateY(-5px);
}

.visualization-card:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.image-link {
  position: relative;
  display: block;
  aspect-ratio: 1672 / 625;
  background: #0a0a0a;
  overflow: hidden;
}

:root:not([data-theme="dark"]) .image-link {
  background: var(--surface-solid);
}

.image-link picture {
  position: absolute;
  inset: 0;
  display: block;
}

.teaser-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.teaser-image {
  object-fit: cover;
  object-position: center;
  border-radius: 0;
  transition: opacity 500ms ease, transform 900ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.teaser-dark {
  opacity: 0;
}

:root[data-theme="dark"] .teaser-light {
  opacity: 0;
}

:root[data-theme="dark"] .teaser-dark {
  opacity: 1;
}

.visualization-card:hover .teaser-image {
  transform: scale(1.018);
}

.visualization-card[data-slug="local-minimum"] .teaser-image {
  object-position: center;
}

.visualization-card[data-slug="stereo-rectification"] .teaser-image {
  filter: brightness(0.82) contrast(1.14);
}

.card-copy {
  display: grid;
  min-height: 0;
  padding: clamp(22px, 2.2vw, 30px);
}

.category {
  font-size: 0.68rem;
}

.card-copy h3 {
  max-width: none;
  margin: 9px 0 0;
  font-size: clamp(1.3rem, 1.8vw, 1.85rem);
  font-weight: 620;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.description {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.instructor-section {
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
  padding: 0 0 clamp(70px, 9vw, 130px);
}

.instructor-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(22px, 3vw, 38px);
  align-items: center;
  width: min(600px, 100%);
  margin: 0 auto;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--card-shadow);
  transition: background 500ms ease, border-color 500ms ease;
}

.instructor-portrait {
  width: clamp(132px, 15vw, 190px);
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface-solid);
  object-fit: cover;
}

.instructor-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.instructor-copy h2 {
  margin: 5px 0 7px;
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  font-weight: 680;
  letter-spacing: -0.045em;
  line-height: 1;
}

.instructor-copy > p:last-of-type {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.45;
}

.instructor-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.instructor-links a {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  transition: color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.instructor-links a:hover {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  transform: translateY(-2px);
}

.instructor-links svg {
  width: 21px;
  height: 21px;
  fill: currentColor;
}

.instructor-links a:nth-child(-n + 2) svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

footer {
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 42px;
  border-top: 1px solid var(--line);
}

.copyright {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

@media (max-width: 900px) {
  .collection-intro {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .visualization-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .visualization-card.featured {
    grid-column: auto;
  }

  .visualization-card {
    grid-template-rows: auto 190px;
  }
}

@media (max-width: 900px) and (orientation: landscape) {
  .visualization-card {
    grid-template-rows: auto 126px;
  }

  .card-copy {
    align-content: center;
    padding: 14px 22px 8px;
  }

  .card-copy h3 {
    margin-top: 6px;
  }

  .description {
    margin-top: 8px;
  }

  .instructor-card {
    grid-template-columns: auto max-content;
    width: max-content;
    max-width: 100%;
  }
}

@media (max-width: 720px) {
  .visualization-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .nav-shell {
    padding: 0 18px;
  }

  .nav-actions > a {
    display: none;
  }

  .hero,
  .collection-intro,
  .visualization-grid,
  .instructor-section,
  footer {
    width: min(100% - 28px, 1440px);
  }

  .hero {
    padding-top: 64px;
  }

  .hero h1 {
    font-size: clamp(2.85rem, 14vw, 5.1rem);
    overflow-wrap: anywhere;
  }

  .hero-meta {
    flex-direction: column;
    gap: 6px;
  }

  .meta-divider {
    display: none;
  }

  .visualization-grid {
    gap: 20px;
  }

  .visualization-card {
    grid-template-rows: auto 126px;
    border-radius: 20px;
  }

  .card-copy {
    align-content: center;
    padding: 14px 22px 8px;
  }

  .card-copy h3 {
    margin-top: 6px;
  }

  .description {
    margin-top: 8px;
  }

  .instructor-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .instructor-portrait {
    justify-self: center;
  }

  .instructor-links {
    justify-content: center;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}