:root {
  color-scheme: dark;
  --bg: #080a0f;
  --bg-soft: #10131b;
  --ink: #f5f7fb;
  --muted: #aab3c4;
  --line: rgba(255, 255, 255, 0.14);
  --cyan: #5eead4;
  --blue: #60a5fa;
  --violet: #a78bfa;
  --amber: #f6c453;
  --green: #7ddf9b;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

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

img {
  display: block;
  max-width: 100%;
}

.scrollbar {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 30;
  width: 100%;
  height: 3px;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--violet), var(--amber));
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 32px;
  transition: background 220ms ease, border-color 220ms ease;
}

.site-header.is-scrolled {
  background: rgba(8, 10, 15, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(94, 234, 212, 0.55);
  border-radius: 8px;
  background: rgba(94, 234, 212, 0.12);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a {
  transition: color 180ms ease;
}

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

.hero {
  position: relative;
  min-height: 86vh;
  display: grid;
  align-items: center;
  padding: 116px 32px 84px;
  isolation: isolate;
  overflow: hidden;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 46%;
  opacity: 0.34;
  filter: saturate(0.95) contrast(1.04);
}

#spectral-canvas {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(8, 10, 15, 0.95) 0%, rgba(8, 10, 15, 0.72) 48%, rgba(8, 10, 15, 0.42) 100%),
    linear-gradient(180deg, rgba(8, 10, 15, 0.2) 0%, rgba(8, 10, 15, 0.92) 100%);
}

.hero-content {
  width: min(920px, 100%);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-weight: 760;
  text-transform: uppercase;
  font-size: 0.82rem;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 5.2rem;
  line-height: 0.95;
}

h2 {
  margin: 0;
  font-size: 2.5rem;
  line-height: 1.08;
}

h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  line-height: 1.2;
}

.subtitle {
  max-width: 780px;
  margin: 24px 0 0;
  color: #e3e9f5;
  font-size: 1.42rem;
  line-height: 1.38;
}

.authors,
.affiliations {
  max-width: 840px;
  margin: 18px 0 0;
  color: var(--muted);
}

.affiliations {
  color: #d6ddec;
}

.action-row,
.resource-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.action {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 16px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.07);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.action svg {
  width: 18px;
  height: 18px;
}

.action:hover {
  transform: translateY(-2px);
  border-color: rgba(94, 234, 212, 0.62);
  background: rgba(255, 255, 255, 0.11);
}

.action.primary {
  border-color: rgba(94, 234, 212, 0.74);
  background: rgba(94, 234, 212, 0.14);
}

.action.muted {
  color: #c6cfdf;
}

.summary-band,
.resource-band {
  background: #0d1119;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.summary-grid {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
}

.summary-grid > div {
  min-height: 170px;
  padding: 30px;
  background: #0d1119;
}

.metric {
  display: block;
  margin-bottom: 16px;
  color: var(--amber);
  font-size: 2.4rem;
  font-weight: 850;
}

.summary-grid p {
  margin: 0;
  color: var(--muted);
}

.section,
.visual-section {
  padding: 100px 32px;
}

.section-heading {
  width: min(780px, 100%);
  margin: 0 auto 44px;
  text-align: center;
}

.section-heading p:not(.eyebrow),
.figure-copy p {
  color: var(--muted);
  font-size: 1.06rem;
}

.section-heading a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.method-timeline {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.method-card,
.code-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow);
}

.method-card {
  min-height: 270px;
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.method-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--violet));
}

.phase {
  display: inline-block;
  margin-bottom: 48px;
  color: var(--green);
  font-size: 0.85rem;
  font-weight: 780;
  text-transform: uppercase;
}

.method-card p {
  margin: 0;
  color: var(--muted);
}

.visual-section {
  background: #0f131b;
}

.figure-wrap {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 34px;
  align-items: center;
}

.figure-copy {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.figure-wrap img,
.comparison-frame img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.contrast-section {
  background:
    linear-gradient(180deg, rgba(96, 165, 250, 0.08), rgba(167, 139, 250, 0.05)),
    var(--bg);
}

.comparison-frame {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.usage-section {
  background: #0f131b;
}

.related-section {
  background: var(--bg);
}

.acknowledgement-section {
  background:
    linear-gradient(180deg, rgba(94, 234, 212, 0.06), rgba(96, 165, 250, 0.04)),
    #0f131b;
}

.contact-section {
  background: var(--bg);
}

.related-list {
  width: min(880px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 12px;
  counter-reset: related;
}

.related-list a,
.related-list span {
  position: relative;
  display: block;
  padding: 18px 20px 18px 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  color: #dbe6f7;
}

.related-list a::before,
.related-list span::before {
  counter-increment: related;
  content: counter(related);
  position: absolute;
  left: 18px;
  top: 18px;
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border-radius: 7px;
  background: rgba(94, 234, 212, 0.14);
  color: var(--cyan);
  font-weight: 780;
  line-height: 1;
}

.code-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.code-panel {
  min-width: 0;
  overflow: hidden;
}

.panel-top {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 18px;
  border-bottom: 1px solid var(--line);
  color: var(--cyan);
  font-weight: 760;
}

.panel-top svg {
  width: 18px;
  height: 18px;
}

pre {
  margin: 0;
  overflow-x: auto;
  white-space: pre-wrap;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
}

.code-panel pre {
  padding: 18px;
  color: #dde7f8;
}

.resource-content {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 76px 0;
}

.resource-content h2 {
  max-width: 760px;
}

.citation-section {
  background: var(--bg);
}

.citation-box {
  width: min(920px, 100%);
  margin: 0 auto;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0f131b;
  color: #dde7f8;
  box-shadow: var(--shadow);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 30px 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 650ms ease, transform 650ms ease;
}

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

@media (max-width: 900px) {
  .site-header {
    padding: 14px 20px;
  }

  .site-nav {
    display: none;
  }

  .hero {
    min-height: 84vh;
    padding: 104px 22px 70px;
  }

  h1 {
    font-size: 3.6rem;
  }

  h2 {
    font-size: 2.05rem;
  }

  .subtitle {
    font-size: 1.12rem;
  }

  .summary-grid,
  .method-timeline,
  .figure-wrap,
  .code-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .visual-section {
    padding: 72px 22px;
  }

  .summary-grid {
    width: 100%;
  }

  .summary-grid > div {
    min-height: 142px;
  }

  .method-card {
    min-height: auto;
  }

  .phase {
    margin-bottom: 24px;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 2.8rem;
  }

  h2 {
    font-size: 1.72rem;
  }

  .action {
    width: 100%;
  }

  .resource-content {
    width: calc(100% - 36px);
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}