:root {
  --bg: #eef4f2;
  --ink: #102425;
  --muted: #456366;
  --primary: #0f766e;
  --primary-dark: #0b5d56;
  --accent: #c57d22;
  --card: #ffffff;
  --line: #d7e4e3;
  --shadow: 0 20px 40px rgba(16, 36, 37, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Sora", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% -5%, #d5ece8 0%, transparent 38%),
    radial-gradient(circle at 90% -10%, #fde5c2 0%, transparent 34%),
    var(--bg);
  line-height: 1.6;
}

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

a {
  color: var(--primary);
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(238, 244, 242, 0.85);
  border-bottom: 1px solid rgba(69, 99, 102, 0.2);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  font-family: "Source Serif 4", serif;
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 500;
  padding: 0.2rem 0.25rem;
  border-bottom: 2px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.hero {
  padding: 4.6rem 0 2.8rem;
}

.venue {
  display: inline-block;
  margin: 0;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(197, 125, 34, 0.15);
  color: #7a4a14;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.2;
}

h1 {
  margin-bottom: 0.85rem;
  max-width: 900px;
  font-family: "Source Serif 4", serif;
  font-size: clamp(1.56rem, 2.85vw, 2.3rem);
  letter-spacing: -0.015em;
  white-space: nowrap;
  text-wrap: balance;
}

.subtitle {
  margin: 0 0 1.15rem;
  max-width: 860px;
  color: var(--muted);
  font-size: 1.02rem;
}

.authors,
.affiliations,
.notes {
  margin: 0.35rem 0;
}

.authors {
  font-size: 0.95rem;
  font-weight: 500;
}

.affiliations,
.notes {
  font-size: 0.86rem;
  color: var(--muted);
}

.dot {
  margin: 0 0.45rem;
}

.link-row {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.72rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 112px;
  padding: 0.64rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid rgba(15, 118, 110, 0.3);
  color: var(--primary-dark);
  background: #f8fdfc;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.2);
}

.btn.primary {
  color: #fff;
  border-color: var(--primary);
  background: linear-gradient(130deg, var(--primary), var(--primary-dark));
}

.section {
  padding: 1rem 0 2.3rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  padding: clamp(1.2rem, 2.2vw, 2rem);
}

.card h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  font-family: "Source Serif 4", serif;
}

.card h3 {
  margin-bottom: 0.35rem;
  font-size: 1.06rem;
}

figure {
  margin: 0;
}

figcaption {
  margin-top: 0.72rem;
  color: var(--muted);
  font-size: 0.89rem;
  text-align: center;
}

.prose p {
  margin: 0;
}

.abstract-text {
  max-width: 78ch;
  font-family: "Sora", sans-serif;
  font-weight: 300;
  font-size: 1.01rem;
  letter-spacing: 0.01em;
  line-height: 1.78;
  color: #1d3a3c;
}

.method-stack {
  display: grid;
  gap: 1rem;
}

.method-step {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.95rem;
  background: linear-gradient(180deg, #ffffff 0%, #f9fcfb 100%);
}

.method-step p {
  margin: 0.3rem 0 0.8rem;
  color: #213c3e;
  font-size: 0.93rem;
}

.key-equation-label {
  margin: 0.8rem 0 0.25rem;
  text-align: center;
  color: #163739;
  font-size: 0.9rem;
}

.formula-box {
  overflow-x: auto;
  text-align: center;
  margin-top: 0.7rem;
  padding: 0.45rem 0.55rem;
  border-radius: 10px;
  border: 1px solid #e6efef;
  background: #f9fbfb;
}

.latex-block {
  margin: 0.45rem 0 0.6rem;
  padding: 0.45rem 0.55rem;
  border-radius: 10px;
  border: 1px solid #e6efef;
  background: #f9fbfb;
  overflow-x: auto;
  text-align: center;
  color: #102f31;
  font-size: 0.9rem;
}

.latex-block mjx-container[display="true"] {
  margin: 0.35rem 0 !important;
}

.latex-block.latex-compact {
  font-size: 0.78rem;
}

.result-block {
  margin-bottom: 1rem;
}

.dataset-block {
  margin-top: 1.1rem;
}

.dataset-block h3 {
  margin-bottom: 0.6rem;
}

.plot-grid,
.qual-grid {
  display: grid;
  gap: 1rem;
}

.plot-grid {
  grid-template-columns: 1fr;
  margin-bottom: 1.25rem;
}

.plot-grid figure,
.qual-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.8rem;
  background: #fff;
}

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

.qual-card img {
  width: 100%;
  height: auto;
  border: 1px solid #edf2f2;
  border-radius: 10px;
}

.section-intro {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.93rem;
}

pre {
  margin: 0;
  overflow-x: auto;
  padding: 0.95rem;
  border-radius: 12px;
  background: #f4f9f8;
  border: 1px solid var(--line);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.87rem;
}

.footer {
  padding: 1rem 0 2.5rem;
  color: var(--muted);
  text-align: center;
  font-size: 0.88rem;
}

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

html.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

html.js .reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  h1 {
    font-size: clamp(1.48rem, 2.55vw, 2.05rem);
  }
}

@media (max-width: 840px) {
  .topbar-inner {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.45rem 0;
  }

  .hero {
    padding-top: 4rem;
  }

  h1 {
    white-space: normal;
  }

  .authors,
  .affiliations,
  .notes {
    font-size: 0.82rem;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(1120px, calc(100% - 1rem));
  }

  .card {
    padding: 1rem;
    border-radius: 14px;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .dot {
    display: none;
  }

}

@media (max-width: 480px) {
  .latex-block {
    font-size: 0.88rem;
  }
}