@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=IBM+Plex+Mono:wght@400;600&family=Sora:wght@300;400;600;700&display=swap");

:root {
  --bg: #f3f7f5;
  --ink: #0f2e33;
  --muted: #4a6970;
  --panel: rgba(255, 255, 255, 0.78);
  --line: rgba(16, 58, 66, 0.16);
  --teal: #0c8b78;
  --amber: #d67a2f;
  --teal-soft: rgba(12, 139, 120, 0.12);
  --amber-soft: rgba(214, 122, 47, 0.12);
  --radius: 18px;
  --shadow: 0 20px 48px rgba(22, 71, 74, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Sora", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: linear-gradient(150deg, #f2f9f6 0%, #f7f3ee 45%, #eff7fb 100%);
  line-height: 1.65;
}

.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(0.5px);
}

.orb-a {
  width: 42rem;
  height: 42rem;
  top: -16rem;
  right: -12rem;
  background: radial-gradient(circle at 35% 35%, rgba(11, 143, 122, 0.3), rgba(11, 143, 122, 0));
  animation: drift 16s ease-in-out infinite;
}

.orb-b {
  width: 36rem;
  height: 36rem;
  left: -13rem;
  top: 25%;
  background: radial-gradient(circle at 60% 40%, rgba(214, 122, 47, 0.26), rgba(214, 122, 47, 0));
  animation: drift 18s ease-in-out infinite reverse;
}

.orb-c {
  width: 40rem;
  height: 40rem;
  right: 8%;
  bottom: -20rem;
  background: radial-gradient(circle at 40% 30%, rgba(40, 112, 170, 0.2), rgba(40, 112, 170, 0));
  animation: drift 22s ease-in-out infinite;
}

@keyframes drift {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(0, -14px, 0) scale(1.03);
  }
}

.panel {
  width: min(1200px, 92vw);
  margin: 1rem auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero {
  margin-top: 2rem;
  padding: 2.4rem;
}

.hero-venue {
  margin: 0;
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--teal);
  background: var(--teal-soft);
  border: 1px solid rgba(12, 139, 120, 0.24);
  border-radius: 999px;
  padding: 0.25rem 0.8rem;
}

h1,
h2,
h3 {
  font-family: "Fraunces", "Georgia", serif;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

h1 {
  margin: 1rem 0 0.7rem;
  font-size: clamp(1.7rem, 3.7vw, 3rem);
}

.hero-subtitle {
  max-width: 78ch;
  margin: 0;
  color: var(--muted);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1.35rem 0 0.55rem;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 0.36rem;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid rgba(15, 46, 51, 0.14);
  background: white;
  color: var(--ink);
  padding: 0.52rem 0.95rem;
  font-size: 0.92rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.pill-link:hover {
  transform: translateY(-2px);
  border-color: rgba(12, 139, 120, 0.4);
  box-shadow: 0 10px 22px rgba(13, 86, 90, 0.18);
}

.pill-link.is-disabled {
  cursor: not-allowed;
  color: #789298;
  background: rgba(255, 255, 255, 0.62);
}

.link-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.authors {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.32rem 0.5rem;
}

.author-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px dashed rgba(15, 46, 51, 0.32);
}

.author-link:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.affiliations {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.stats-grid {
  margin-top: 1.4rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.stat-card {
  border-radius: 14px;
  border: 1px solid rgba(15, 46, 51, 0.1);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.92), rgba(244, 251, 250, 0.76));
  padding: 0.95rem;
}

.stat-card .value {
  display: block;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--teal);
}

.stat-card .label {
  color: var(--muted);
  font-size: 0.86rem;
}

.toc {
  position: sticky;
  top: 0.5rem;
  z-index: 20;
  padding: 0.7rem 1rem;
  display: flex;
  gap: 0.2rem;
  overflow-x: auto;
}

.toc a {
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-size: 0.9rem;
  border: 1px solid transparent;
}

.toc a:hover {
  border-color: rgba(214, 122, 47, 0.35);
  background: var(--amber-soft);
}

section {
  padding: 1.9rem;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.1rem;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.15rem;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 75ch;
}

.takeaways {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.takeaways li {
  margin-bottom: 0.45rem;
}

.method-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.method-cards article {
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid rgba(15, 46, 51, 0.12);
  background: linear-gradient(150deg, #ffffff, #f7fbfc);
}

.method-cards h3 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
}

.method-cards p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
}

.figure-card {
  border-radius: 14px;
  border: 1px solid rgba(15, 46, 51, 0.12);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(247, 250, 252, 0.88));
  padding: 0.75rem;
}

.figure-frame {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(15, 46, 51, 0.12);
  background: #ffffff;
  min-height: 260px;
}

.figure-frame.tall {
  min-height: 320px;
}

.figure-frame object {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 260px;
}

.figure-card h3 {
  margin: 0.65rem 0 0.3rem;
  font-size: 1rem;
}

.figure-link {
  display: inline-flex;
  text-decoration: none;
  color: var(--teal);
  font-size: 0.87rem;
}

.figure-link:hover {
  color: #076e5f;
}

.bibtex {
  margin-top: 0.75rem;
  padding: 1rem;
  white-space: pre-wrap;
  border-radius: 12px;
  border: 1px solid rgba(15, 46, 51, 0.12);
  background: rgba(255, 255, 255, 0.7);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
}

.footer {
  padding: 1rem 1.4rem;
  margin-bottom: 2rem;
}

.footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.62s ease, transform 0.62s ease;
}

@media (max-width: 1100px) {
  .stats-grid,
  .method-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .hero,
  section {
    padding: 1.2rem;
  }

  .stats-grid,
  .method-cards,
  .figure-grid {
    grid-template-columns: 1fr;
  }

  .figure-frame,
  .figure-frame object {
    min-height: 230px;
  }

  .figure-frame.tall {
    min-height: 270px;
  }
}

@media (max-width: 520px) {
  .panel {
    width: min(1200px, 95vw);
  }

  .toc {
    top: 0;
    border-radius: 12px;
  }

  h1 {
    font-size: clamp(1.42rem, 6vw, 2rem);
  }

  .hero-venue {
    font-size: 0.75rem;
  }
}

.figure-card.span-2 {
  grid-column: 1 / -1;
}

.figure-frame.large {
  min-height: 460px;
}

.figure-frame.xlarge {
  min-height: 560px;
}

.figure-frame.large object {
  min-height: 460px;
}

.figure-frame.xlarge object {
  min-height: 560px;
}

@media (max-width: 820px) {
  .figure-frame.large,
  .figure-frame.large object {
    min-height: 290px;
  }

  .figure-frame.xlarge,
  .figure-frame.xlarge object {
    min-height: 320px;
  }
}

/* Full-canvas visual mode for Intro and Method */
.panel.wide-visual {
  width: min(1560px, 98vw);
}

.wide-visual .figure-card.span-2 {
  padding: 0;
  border: 0;
  background: transparent;
}

.wide-visual .figure-frame {
  border: 0;
  border-radius: 14px;
  box-shadow: 0 24px 50px rgba(13, 62, 66, 0.18);
}

.wide-visual .figure-frame.large,
.wide-visual .figure-frame.large object {
  min-height: clamp(500px, 70vh, 950px);
}

.wide-visual .figure-frame.xlarge,
.wide-visual .figure-frame.xlarge object {
  min-height: clamp(560px, 78vh, 1080px);
}

@media (max-width: 820px) {
  .panel.wide-visual {
    width: min(1200px, 95vw);
  }

  .wide-visual .figure-frame.large,
  .wide-visual .figure-frame.large object {
    min-height: 320px;
  }

  .wide-visual .figure-frame.xlarge,
  .wide-visual .figure-frame.xlarge object {
    min-height: 360px;
  }
}

.author-affil {
  margin-left: 0.15rem;
  font-size: 0.68em;
  color: var(--teal);
  font-weight: 600;
}

.affiliations {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.55rem;
}

.aff-item {
  white-space: nowrap;
}

.aff-sep {
  color: var(--muted);
}

.aff-index {
  font-size: 0.68em;
  color: var(--teal);
  font-weight: 600;
  margin-right: 0.12rem;
}