:root {
  color-scheme: dark;
  --bg: #080b11;
  --bg-soft: #0d111a;
  --surface: #121824;
  --line: rgba(223, 231, 242, 0.15);
  --text: #f4f6fa;
  --muted: #aeb7c7;
  --accent: #ff713d;
  --accent-light: #ffb06b;
  --cyan: #5ed8ff;
  --page: min(1220px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 75% 5%, rgba(46, 97, 133, 0.14), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  transform: translateY(-160%);
  border-radius: 4px;
  background: var(--text);
  color: var(--bg);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  height: 78px;
  padding: 0 max(24px, calc((100vw - 1220px) / 2));
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header.scrolled {
  border-color: var(--line);
  background: rgba(8, 11, 17, 0.82);
  backdrop-filter: blur(16px);
}

.brand,
.header-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Manrope", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-mark {
  width: 21px;
  height: 21px;
  border: 2px solid var(--text);
  border-radius: 50%;
  box-shadow: inset -5px -2px 0 var(--accent);
}

.site-header nav {
  display: flex;
  gap: 34px;
  color: var(--muted);
  font-size: 14px;
}

.site-header nav a,
.header-link {
  transition: color 150ms ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible,
.header-link:hover,
.header-link:focus-visible {
  color: var(--accent-light);
}

.header-link {
  justify-self: end;
}

.hero {
  position: relative;
  width: var(--page);
  margin: 0 auto;
  padding: 176px 0 82px;
}

.hero-glow {
  position: absolute;
  top: 80px;
  right: -10vw;
  width: 680px;
  height: 680px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 113, 61, 0.12), transparent 64%);
  filter: blur(24px);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: none;
  margin: 0 auto;
  text-align: center;
}

.eyebrow,
.section-label,
.card-kicker,
.result-index {
  margin: 0 0 20px;
  color: var(--accent-light);
  font-family: "Manrope", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-block;
  margin-right: 10px;
  padding: 3px 8px;
  border: 1px solid rgba(255, 176, 107, 0.45);
  border-radius: 99px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: "Manrope", sans-serif;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

h1 {
  max-width: none;
  margin: 0 auto;
  font-size: clamp(42px, 4.6vw, 68px);
  font-weight: 500;
  white-space: nowrap;
}

.hero-subtitle {
  margin: 10px 0 28px;
  background: linear-gradient(90deg, var(--accent-light), #f8d8be 52%, var(--cyan));
  -webkit-background-clip: text;
  color: transparent;
  font-family: "Manrope", sans-serif;
  font-size: clamp(42px, 4.6vw, 68px);
  line-height: 1.2;
  padding-bottom: 0.08em;
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.with-word {
  color: var(--text);
  -webkit-text-fill-color: var(--text);
}

.lede {
  max-width: 740px;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 21px);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #1b0c06;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(255, 176, 107, 0.5);
  background: rgba(255, 113, 61, 0.08);
}

.result-media,
.video-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.authors {
  max-width: 1080px;
  margin: 28px auto 0;
  text-align: center;
}

.authors p {
  margin-bottom: 8px;
}

.authors > p:first-child a:not(:last-child)::after {
  content: " · ";
  color: #596275;
}

.authors > p:first-child a {
  text-decoration-color: transparent;
  text-underline-offset: 4px;
  transition: color 150ms ease, text-decoration-color 150ms ease;
}

.authors > p:first-child a:hover,
.authors > p:first-child a:focus-visible {
  color: var(--accent-light);
  text-decoration: underline;
  text-decoration-color: currentColor;
}

.authors sup,
.affiliations sup {
  color: var(--accent-light);
}

.affiliations {
  color: var(--muted);
  font-size: 14px;
}

.section {
  width: var(--page);
  margin: 0 auto;
  padding: 120px 0;
  border-top: 1px solid var(--line);
}

.abstract-grid,
.citation-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(400px, 1.15fr);
  gap: clamp(48px, 8vw, 120px);
}

.abstract-grid h2,
.section-heading h2,
.citation-grid h2 {
  margin-bottom: 0;
  font-size: clamp(38px, 5vw, 66px);
  font-weight: 500;
}

.abstract-copy {
  color: var(--muted);
  font-size: 19px;
}

.abstract-copy p:last-child {
  margin-bottom: 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 1.45fr 0.55fr;
  align-items: end;
  gap: 64px;
  margin-bottom: 64px;
}

.section-heading > p {
  margin-bottom: 6px;
  color: var(--muted);
}

.pipeline {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: 14px;
  margin-bottom: 26px;
}

.pipeline-node {
  min-height: 164px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
}

.pipeline-node.featured {
  border-color: rgba(255, 113, 61, 0.48);
  background: linear-gradient(145deg, rgba(255, 113, 61, 0.13), rgba(94, 216, 255, 0.05));
}

.node-number {
  display: block;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.pipeline-node strong,
.pipeline-node small {
  display: block;
}

.pipeline-node strong {
  margin-bottom: 4px;
  font-family: "Manrope", sans-serif;
  font-size: 20px;
}

.pipeline-node small {
  color: var(--muted);
}

.pipeline-arrow {
  display: grid;
  place-items: center;
  color: var(--accent-light);
  font-size: 24px;
}

.loss-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}

.loss-card {
  position: relative;
  min-height: 420px;
  padding: 36px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
}

.loss-card h3,
.result-card h3,
.result-feature h3 {
  font-size: clamp(28px, 3.2vw, 43px);
  font-weight: 500;
}

.loss-card > p:not(.card-kicker) {
  max-width: 470px;
  color: var(--muted);
}

.loss-card code {
  position: absolute;
  bottom: 34px;
  left: 36px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: #d4dae4;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
}

.loss-icon {
  position: absolute;
  top: 28px;
  right: 28px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
}

.diffuse-icon {
  background: radial-gradient(circle at 35% 35%, #dff6ff, #6a91ab 35%, #172433 70%);
  box-shadow: 0 0 60px rgba(94, 216, 255, 0.2);
}

.glossy-icon {
  background:
    radial-gradient(circle at 28% 25%, #fff 0 4%, #bcecff 5%, transparent 14%),
    radial-gradient(circle at 40% 45%, #5d7787, #101720 70%);
  box-shadow: 0 0 60px rgba(255, 113, 61, 0.16);
}

.result-feature {
  display: grid;
  grid-template-columns: 0.42fr 0.58fr;
  gap: 44px;
  align-items: center;
  margin-bottom: 30px;
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(130deg, rgba(255, 113, 61, 0.08), rgba(94, 216, 255, 0.045));
}

.result-copy p,
.result-card p {
  color: var(--muted);
}

.result-media {
  background: #f5f5f3;
}

.result-media img {
  aspect-ratio: 1.48;
  object-fit: contain;
}

.result-feature .result-media img {
  aspect-ratio: 2.02;
}

.result-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.result-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
}

.result-card .result-media {
  margin-bottom: 28px;
}

.result-card h3 {
  margin-bottom: 14px;
  font-size: 30px;
}

.result-card p:last-child {
  margin-bottom: 0;
}

.video-shell {
  padding: 8px;
  background: #020305;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.45);
}

.video-shell video {
  aspect-ratio: 16 / 9;
  border-radius: 5px;
  background: #000;
}

.citation-grid h2 {
  margin-bottom: 20px;
  font-size: clamp(34px, 4.4vw, 56px);
}

.citation-grid > div:first-child p {
  color: var(--accent-light);
}

.citation-block {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
}

.citation-block pre {
  margin: 0;
  padding: 28px 28px 76px;
  overflow-x: auto;
  color: #cdd5e1;
  font-size: 13px;
  line-height: 1.6;
}

.copy-button {
  position: absolute;
  right: 18px;
  bottom: 18px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: #181f2b;
  color: var(--text);
  cursor: pointer;
}

.copy-button:hover,
.copy-button:focus-visible {
  border-color: var(--accent);
}

footer {
  display: flex;
  justify-content: space-between;
  width: var(--page);
  margin: 0 auto;
  padding: 42px 0 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 840px) {
  :root {
    --page: min(100% - 32px, 680px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
    height: 68px;
    padding: 0 16px;
  }

  .site-header nav {
    display: none;
  }

  .hero {
    padding-top: 130px;
  }

  h1,
  .hero-subtitle {
    white-space: normal;
  }

  .abstract-grid,
  .citation-grid,
  .section-heading,
  .result-feature {
    grid-template-columns: 1fr;
  }

  .section-heading {
    gap: 24px;
  }

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

  .pipeline-arrow {
    height: 18px;
    transform: rotate(90deg);
  }

  .pipeline-node {
    min-height: 142px;
  }

  .node-number {
    margin-bottom: 25px;
  }

  .loss-grid,
  .result-pair {
    grid-template-columns: 1fr;
  }

  .result-feature {
    padding: 28px;
  }
}

@media (max-width: 560px) {
  h1,
  .hero-subtitle {
    font-size: clamp(36px, 11vw, 54px);
  }

  .hero-actions {
    flex-direction: column;
  }

  .authors > p:first-child a {
    display: block;
  }

  .authors > p:first-child a:not(:last-child)::after {
    content: none;
  }

  .section {
    padding: 86px 0;
  }

  .abstract-copy {
    font-size: 17px;
  }

  .loss-card {
    min-height: 440px;
    padding: 28px;
  }

  .loss-card code {
    right: 28px;
    bottom: 28px;
    left: 28px;
    overflow-x: auto;
  }

  .loss-icon {
    width: 62px;
    height: 62px;
  }

  .result-card {
    padding: 18px;
  }

  footer {
    display: block;
  }

  footer a {
    display: inline-block;
    margin-top: 12px;
  }
}