:root {
  --bg: #eef3ee;
  --bg-2: #dbe7dc;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-2: #ffffff;
  --text: #102018;
  --muted: #4e6258;
  --line: rgba(16, 32, 24, 0.14);
  --accent: #0d8e72;
  --accent-2: #ef6a3b;
  --shadow: 0 20px 40px rgba(9, 18, 13, 0.12);
}

:root[data-theme="dark"] {
  --bg: #0b1210;
  --bg-2: #0f1a16;
  --surface: rgba(18, 30, 24, 0.78);
  --surface-2: #13211b;
  --text: #eaf7f0;
  --muted: #97b3a6;
  --line: rgba(212, 240, 226, 0.16);
  --accent: #2fc3a1;
  --accent-2: #ff8d5f;
  --shadow: 0 22px 44px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "IBM Plex Sans", sans-serif;
  line-height: 1.6;
}

img,
video {
  width: 100%;
  height: auto;
  display: block;
}

[hidden] {
  display: none !important;
}

.page-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 8% 8%, color-mix(in srgb, var(--accent) 26%, transparent), transparent 32%),
    radial-gradient(circle at 92% 6%, color-mix(in srgb, var(--accent-2) 22%, transparent), transparent 34%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  z-index: -1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 68px;
  padding: 0 clamp(16px, 4vw, 44px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  backdrop-filter: blur(12px);
}

.site-header__logo {
  color: var(--text);
  text-decoration: none;
  font-family: "Sora", sans-serif;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.site-header__nav {
  display: flex;
  gap: 18px;
}

.site-header__nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}

.site-header__nav a:hover {
  color: var(--text);
}

main {
  width: min(1180px, 92vw);
  margin: 28px auto 74px;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.2;
  font-family: "Sora", sans-serif;
}

h1 {
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  margin-bottom: 12px;
}

h3 {
  font-size: 1.05rem;
}

p {
  margin: 0;
}

.hero {
  display: grid;
  gap: 18px;
}

.hero__inner {
  padding: clamp(20px, 4vw, 32px);
  text-align: center;
}

.hero__venue {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  padding: 7px 11px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero__subtitle {
  margin-top: 14px;
  color: var(--muted);
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.hero__authors,
.hero__affil {
  margin-top: 15px;
  font-size: 0.96rem;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.hero__authors {
  font-weight: 600;
}

.hero__authors a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.hero__authors a:hover,
.hero__authors a:focus-visible {
  border-bottom-color: color-mix(in srgb, var(--accent) 55%, transparent);
}

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

.muted {
  color: color-mix(in srgb, var(--muted) 86%, transparent);
}

.hero__links {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.section {
  margin-top: 30px;
}

.section__lead {
  margin: 4px 0 16px;
  color: var(--muted);
}

.section__body {
  padding: clamp(16px, 3vw, 24px);
}

.surface {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.stack {
  padding: clamp(14px, 3vw, 22px);
  display: grid;
  gap: 16px;
}

.section.surface {
  padding: clamp(16px, 3vw, 24px);
}

.figure-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: color-mix(in srgb, var(--surface-2) 84%, transparent);
  cursor: zoom-in;
}

.figure-card figcaption {
  padding: 10px 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.highlights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.mini-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: color-mix(in srgb, var(--surface-2) 82%, transparent);
  cursor: pointer;
}

.mini-card img {
  aspect-ratio: 16 / 10;
  object-fit: contain;
  object-position: center;
  background: #f2f3f3;
}

.mini-card h3,
.mini-card p {
  padding: 0 11px;
}

.mini-card h3 {
  margin-top: 10px;
  font-size: 0.95rem;
}

.mini-card p {
  margin: 6px 0 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.demo-panel {
  margin-top: 16px;
  padding: 14px;
}

.demo-panel h3,
.comparison-board h3 {
  margin-bottom: 11px;
}

.comparison-board {
  margin-top: 16px;
  padding: 14px;
}

.comparison-toolbar {
  margin: 2px 0 10px;
  display: flex;
  align-items: center;
}

.comparison-jumps {
  width: 100%;
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding-bottom: 2px;
  scroll-behavior: smooth;
}

.comparison-jump {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  color: var(--muted);
  padding: 6px 10px;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.comparison-jump.is-active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-2));
  color: var(--accent);
}

.comparison-nav-wrap {
  position: relative;
}

.comparison-side-arrow {
  position: absolute;
  top: 50%;
  z-index: 5;
  width: 42px;
  height: 42px;
  border: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  color: var(--text);
  display: grid;
  place-items: center;
  font: inherit;
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(7, 14, 11, 0.18);
  transform: translateY(-50%);
  backdrop-filter: blur(6px);
}

.comparison-side-arrow:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  color: var(--accent);
}

.comparison-side-arrow:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.comparison-side-arrow--left {
  left: -12px;
}

.comparison-side-arrow--right {
  right: -12px;
}

.comparison-carousel {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 0 8px 8px;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
}

.comparison-carousel > .comparison-board,
.comparison-carousel > .demo-panel {
  flex: 0 0 min(1080px, 94vw);
  margin-top: 0;
  scroll-snap-align: start;
}

.comparison-carousel::-webkit-scrollbar {
  height: 10px;
}

.comparison-carousel::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--muted) 28%, transparent);
  border-radius: 999px;
}

.comparison-layout {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(170px, 220px) 1fr;
  align-items: stretch;
}

.comparison-layout .demo-input {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.comparison-layout .demo-input > img {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  object-fit: contain;
  object-position: center;
  background: #f2f3f3;
}

.comparison-layout .demo-input figcaption {
  margin-top: auto;
}

.comparison-rows {
  display: grid;
  gap: 12px;
}

.comparison-row {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.comparison-row--bottom {
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.comparison-row--bottom .engine-card {
  flex: 0 1 calc((100% - 20px) / 3);
  max-width: calc((100% - 20px) / 3);
}

.engine-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface-2) 84%, transparent);
  padding: 10px;
}

.engine-card h4 {
  margin: 0 0 8px;
  text-align: center;
  font-family: "Sora", sans-serif;
  font-size: 0.92rem;
}

.engine-card p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
  text-align: center;
}

.engine-card--ours {
  outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
}

.engine-media-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.demo-input {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: color-mix(in srgb, var(--surface-2) 84%, transparent);
  cursor: zoom-in;
}

.demo-input figcaption {
  padding: 7px 10px;
  font-size: 0.86rem;
  color: var(--muted);
  text-align: center;
}

.media-card {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: color-mix(in srgb, var(--surface-2) 86%, transparent);
  cursor: pointer;
  aspect-ratio: 4 / 5;
}

.media-card img,
.media-card video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #f2f3f3;
}

.media-card--geo img,
.media-card--geo video {
  filter: grayscale(1);
}

.media-card img {
  z-index: 0;
  transition: opacity 180ms ease;
}

.media-card__preview {
  z-index: 1;
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.media-card.is-video-ready img {
  opacity: 0;
}

.media-card.is-video-ready .media-card__preview {
  opacity: 1;
}

.media-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 62%, rgba(0, 0, 0, 0.58));
  pointer-events: none;
  z-index: 2;
}

.media-card span {
  position: absolute;
  left: 8px;
  bottom: 6px;
  z-index: 3;
  color: #f3f5f5;
  font-size: 0.82rem;
  font-weight: 700;
}

.media-card--ours {
  outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
}

.media-card--empty {
  cursor: default;
  border-style: dashed;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--surface-2) 80%, transparent);
}

.media-card--empty::after {
  display: none;
}

.media-card--empty span {
  position: static;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.94rem;
}

.two-row-demo {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.two-row-demo__item {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(130px, 190px) minmax(0, 1fr) minmax(0, 1fr);
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.figure-grid--clean {
  gap: 14px;
}

.figure-card--clean {
  display: flex;
  flex-direction: column;
}

.figure-card--clean .figure-card__media {
  height: 250px;
  border-bottom: 1px solid var(--line);
  background: #f2f3f3;
}

.figure-card--clean.figure-card--clean-tall .figure-card__media {
  height: 330px;
}

.figure-card--clean .figure-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #f2f3f3;
}

.figure-card--clean figcaption {
  min-height: 56px;
}

pre {
  margin: 12px 0 0;
  padding: 12px;
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-2) 90%, transparent);
}

code {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 0.86rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  border-radius: 999px;
  padding: 8px 13px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--accent);
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
}

.chip:hover {
  border-color: color-mix(in srgb, var(--accent-2) 40%, var(--line));
  color: var(--accent-2);
}

.chip--disabled {
  opacity: 0.55;
  border-style: dashed;
  cursor: not-allowed;
}

.site-footer {
  width: min(1180px, 92vw);
  margin: 0 auto 42px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer__card {
  padding: 16px;
}

.license-block {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.license-block img {
  width: 88px;
  height: 31px;
}

.license-block p {
  margin: 0;
}

.license-block a {
  color: var(--accent);
}

.lightbox {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(0, 0, 0, 0.82);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
  z-index: 40;
}

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

.lightbox__close {
  position: absolute;
  top: 16px;
  right: 18px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 999px;
  padding: 7px 11px;
  background: rgba(19, 19, 19, 0.72);
  color: #fff;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.lightbox__content {
  width: min(1100px, 96vw);
}

.lightbox__content img,
.lightbox__content video {
  max-height: 78vh;
  width: 100%;
  object-fit: contain;
  border-radius: 12px;
  background: #000;
}

.lightbox__caption {
  margin-top: 9px;
  color: rgba(240, 240, 240, 0.94);
  text-align: center;
  font-size: 0.92rem;
}

.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 560ms ease;
}

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

@media (max-width: 1024px) {
  .site-header__nav {
    display: none;
  }

  .highlights {
    grid-template-columns: 1fr;
  }

  .comparison-layout {
    grid-template-columns: 1fr;
  }

  .comparison-side-arrow {
    width: 38px;
    height: 38px;
  }

  .comparison-carousel > .comparison-board,
  .comparison-carousel > .demo-panel {
    flex-basis: 100%;
  }

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

  .comparison-row--bottom {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .comparison-row--bottom .engine-card {
    flex: initial;
    max-width: none;
  }

  .two-row-demo {
    grid-template-columns: 1fr;
  }

  .two-row-demo__item {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  main {
    width: min(1180px, 94vw);
  }

  .site-header {
    padding: 0 12px;
  }

  .hero__links {
    display: grid;
    grid-template-columns: 1fr;
  }

  .comparison-side-arrow--left {
    left: 2px;
  }

  .comparison-side-arrow--right {
    right: 2px;
  }

  .comparison-carousel {
    padding: 0 14px 8px;
  }

  .comparison-row,
  .figure-grid {
    grid-template-columns: 1fr;
  }

  .figure-card--clean .figure-card__media,
  .figure-card--clean.figure-card--clean-tall .figure-card__media {
    height: 220px;
  }

  .comparison-row--bottom {
    grid-template-columns: 1fr;
  }

  .section {
    margin-top: 24px;
  }
}