:root {
  --ink: #152028;
  --ink-soft: #3a4a56;
  --mist: #e7eef3;
  --paper: #f5f8fa;
  --steel: #c5d3dc;
  --teal: #0b7a6e;
  --teal-deep: #065a51;
  --amber: #c77b2b;
  --white: #ffffff;
  --shadow: 0 24px 60px rgba(21, 32, 40, 0.18);
  --radius: 2px;
  --font-display: "Bricolage Grotesque", Georgia, serif;
  --font-body: "Outfit", "Helvetica Neue", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.05rem;
  line-height: 1.65;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(11, 122, 110, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 20%, rgba(199, 123, 43, 0.07), transparent 50%),
    linear-gradient(180deg, #f0f5f8 0%, var(--paper) 40%, #eef3f6 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--teal-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--teal);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--white);
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.shell {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.shell.narrow {
  width: min(760px, calc(100% - 2.5rem));
}

/* Header */
.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  padding: 1.25rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--white);
  text-decoration: none;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35);
}

.nav {
  display: flex;
  gap: 1.25rem;
}

.nav a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

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

/* Hero — full-bleed composition */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% 40%;
  transform: scale(1.06);
  animation: hero-drift 18s var(--ease) infinite alternate;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(12, 20, 28, 0.42) 0%, rgba(12, 20, 28, 0.18) 30%, rgba(12, 20, 28, 0.88) 100%),
    linear-gradient(90deg, rgba(12, 20, 28, 0.6) 0%, rgba(12, 20, 28, 0.2) 55%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 8rem 0 5rem;
}

.venue-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin: 0 0 1.5rem;
}

.venue-badge {
  display: inline-flex;
  align-items: center;
  min-height: 2.1rem;
  padding: 0.35rem 0.9rem;
  background: var(--amber);
  color: #1a1208;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  box-shadow: 0 8px 28px rgba(199, 123, 43, 0.35);
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.2rem, 8vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: -0.045em;
  text-shadow: 0 8px 40px rgba(0, 0, 0, 0.35);
}

.headline {
  margin: 1.6rem 0 0;
  max-width: 28rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.3vw, 1.65rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.94);
  text-wrap: pretty;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 2.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 560;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s ease, border-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--teal);
  color: var(--white);
  border-color: var(--teal);
}

.btn-primary:hover {
  background: var(--teal-deep);
  color: var(--white);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.18);
  color: var(--white);
}

.btn-disabled {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.55);
  border-color: rgba(255, 255, 255, 0.2);
  cursor: default;
}

.btn-disabled:hover {
  transform: none;
}

/* Authors below hero */
.authors-bar {
  padding: 2.35rem 0 2.5rem;
  border-bottom: 1px solid rgba(21, 32, 40, 0.08);
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(10px);
  text-align: center;
}

.paper-title {
  margin: 0 auto;
  max-width: 52rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.35;
  color: var(--ink);
}

.authors-bar .authors {
  margin: 1.1rem auto 0;
  max-width: 52rem;
  font-size: clamp(1.05rem, 1.7vw, 1.18rem);
  line-height: 1.75;
  color: var(--ink-soft);
}

.authors-bar .authors sup {
  font-size: 0.7em;
  line-height: 0;
  vertical-align: super;
  color: var(--teal-deep);
}

.affil-list {
  list-style: none;
  margin: 1rem auto 0;
  padding: 0;
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.6;
  color: var(--ink-soft);
}

.affil-list li {
  margin: 0.2rem 0 0;
}

.affil-list sup {
  font-size: 0.72em;
  color: var(--teal-deep);
  margin-right: 0.15rem;
}

.affil-notes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem 1.35rem;
  margin: 0.85rem auto 0;
  font-size: clamp(0.92rem, 1.3vw, 1rem);
  color: var(--ink-soft);
}

.affil-notes span {
  display: inline-flex;
  align-items: baseline;
  gap: 0.2rem;
}

.affil-notes sup {
  font-size: 0.78em;
  color: var(--teal-deep);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(231, 238, 243, 0.85));
  border-block: 1px solid rgba(21, 32, 40, 0.05);
}

.section-label {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-deep);
}

.section-head {
  max-width: min(54rem, 100%);
  margin-bottom: 2.5rem;
}

.section-head .section-label {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-deep);
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw, 2.45rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.18;
  text-wrap: balance;
  max-width: 20em;
}

.section-head p {
  margin: 0.9rem 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.65;
  max-width: 46rem;
  text-wrap: pretty;
}

.abstract-text {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.abstract-text strong {
  color: var(--ink);
  font-weight: 600;
}

.task-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 0.5rem;
}

.task-grid article {
  padding-top: 1rem;
  border-top: 2px solid var(--teal);
}

.task-grid h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.task-grid p:last-child {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.explain-kicker {
  margin: 0 0 0.55rem;
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
}

/* Figures */
.figure {
  margin: 0;
}

.figure img {
  width: 100%;
  height: auto;
  display: block;
  background: transparent;
  border: none;
  box-shadow: none;
  mix-blend-mode: darken;
}

.figure figcaption {
  margin-top: 1rem;
  width: 100%;
  max-width: none;
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.figure figcaption p {
  margin: 0;
}

.figure figcaption p + p {
  margin-top: 0.75rem;
}

.figure figcaption p:first-child {
  color: var(--ink);
  font-weight: 500;
}

.figure-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.figure-scroll img {
  min-width: min(100%, 920px);
  width: max(100%, 920px);
}

@media (min-width: 1100px) {
  .figure-scroll img {
    width: 100%;
    min-width: 0;
  }
}

.figure-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.figure-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.step-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
}

.step-list li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 0.85rem;
}

.step-num {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 750;
  color: var(--teal);
  line-height: 1.2;
}

.step-list h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.step-list p {
  margin: 0.4rem 0 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.explain {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2rem;
  align-items: center;
  padding: 2.25rem 0;
  border-top: 1px solid rgba(21, 32, 40, 0.1);
}

.explain:last-child {
  border-bottom: 1px solid rgba(21, 32, 40, 0.1);
}

.explain.reverse {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
}

.explain.reverse .explain-copy {
  order: 2;
}

.explain.reverse .figure {
  order: 1;
}

.explain-kicker {
  margin: 0 0 0.55rem;
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
}

.explain-copy h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.explain-copy p {
  margin: 0.85rem 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.explain-copy code {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.9em;
  color: var(--teal-deep);
}

/* Contributions — type-led, not cards */
.contrib-stack {
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(21, 32, 40, 0.12);
}

.contrib {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1.25rem;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(21, 32, 40, 0.12);
}

.contrib-index {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--teal);
  line-height: 1;
  padding-top: 0.35rem;
}

.contrib-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.contrib-kicker {
  margin: 0.35rem 0 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--amber);
}

.contrib-body p:last-child {
  margin: 0;
  max-width: 46rem;
  color: var(--ink-soft);
}

/* Scale */
.scale-section {
  background:
    linear-gradient(135deg, rgba(11, 122, 110, 0.06), transparent 40%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(231, 238, 243, 0.9));
  border-block: 1px solid rgba(21, 32, 40, 0.06);
}

.scale-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.scale-grid li {
  padding-top: 0.5rem;
  border-top: 2px solid var(--teal);
}

.scale-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ink);
}

.scale-label {
  display: block;
  margin-top: 0.55rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* Results */
.results-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 3rem;
}

.result-highlight {
  padding: 1.5rem 0;
}

.result-metric {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 10vw, 7.5rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.9;
  color: var(--teal);
}

.result-caption {
  margin: 1rem 0 0;
  max-width: 18rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.result-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.result-points li {
  padding-left: 1.15rem;
  border-left: 2px solid var(--amber);
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.media-block {
  display: grid;
  gap: 1rem;
}

.media-frame {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #111a21;
}

.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #111a21;
  mix-blend-mode: normal;
}

.video-grid {
  display: grid;
  gap: 2.25rem;
}

.video-card {
  margin: 0;
}

.video-card .media-frame {
  border: 1px solid rgba(21, 32, 40, 0.08);
}

.video-card figcaption {
  margin-top: 0.85rem;
}

.video-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.video-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.6;
}

.keywords {
  margin: 0;
  font-size: 1.1rem;
  color: var(--ink-soft);
}

/* Cite */
.cite-section {
  padding-bottom: 4rem;
}

.bibtex-wrap {
  position: relative;
  background: #111a21;
  color: #d7e2ea;
  padding: 1.25rem 1.25rem 1.25rem;
  box-shadow: var(--shadow);
}

.bibtex-wrap pre {
  margin: 0;
  overflow-x: auto;
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius);
  cursor: pointer;
}

.copy-btn:hover,
.copy-btn.is-copied {
  background: var(--teal);
  border-color: var(--teal);
}

.links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 1.25rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.links-row a {
  font-weight: 550;
}

/* Footer */
.site-footer {
  padding: 1.75rem 0 2.5rem;
  border-top: 1px solid rgba(21, 32, 40, 0.08);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-inner p {
  margin: 0;
}

/* Motion */
.fade-up {
  opacity: 0;
  transform: translateY(18px);
  animation: fade-up 0.9s var(--ease) forwards;
}

.delay-1 {
  animation-delay: 0.12s;
}
.delay-2 {
  animation-delay: 0.22s;
}
.delay-3 {
  animation-delay: 0.32s;
}
.delay-4 {
  animation-delay: 0.42s;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@keyframes fade-up {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes hero-drift {
  from {
    transform: scale(1.06) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.12) translate3d(-1.5%, -1%, 0);
  }
}

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

  .fade-up,
  .reveal,
  .hero-image {
    animation: none !important;
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Responsive */
@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .hero-content {
    padding: 6.5rem 0 4rem;
  }

  .scale-grid,
  .figure-grid.two,
  .step-list,
  .task-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .explain,
  .explain.reverse {
    grid-template-columns: 1fr;
  }

  .explain.reverse .explain-copy,
  .explain.reverse .figure {
    order: initial;
  }

  .results-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 520px) {
  .shell,
  .shell.narrow {
    width: calc(100% - 1.5rem);
  }

  .section {
    padding: 3.5rem 0;
  }

  .cta-row .btn {
    flex: 1 1 calc(50% - 0.7rem);
  }
}