:root {
  --bg: #fafbfc;
  --surface: #ffffff;
  --text: #1a1a2e;
  --muted: #5c6370;
  --accent: #1e5f8a;
  --accent-light: #e8f2f8;
  --border: #e2e6ea;
  --badge: #2d6a4f;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
  --radius: 12px;
  --max-width: 960px;
  --max-width-wide: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 56px 24px 40px;
  background: linear-gradient(180deg, #eef4f8 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.badge {
  display: inline-block;
  background: var(--badge);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.hero h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.hero .subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 0 0 24px;
}

.authors {
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 8px;
}

.authors .author {
  white-space: nowrap;
}

.authors .corresponding::after {
  content: "†";
  color: var(--accent);
}

.affiliations {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 28px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-muted {
  background: var(--surface);
  color: var(--muted);
  border: 1.5px solid var(--border);
}

/* Sections */
section {
  padding: 48px 0;
}

section + section {
  border-top: 1px solid var(--border);
}

h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.55rem;
  font-weight: 700;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 28px 0 12px;
}

p {
  margin: 0 0 14px;
}

.abstract {
  font-size: 1.02rem;
  text-align: justify;
}

/* Highlights */
.highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.highlight-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.highlight-card .metric {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}

.highlight-card .label {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 4px;
}

/* Figures */
.figure {
  margin: 24px 0;
  text-align: center;
}

.figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.figure figcaption {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 12px;
  line-height: 1.5;
  text-align: left;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 16px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--surface);
}

table.table-compact {
  font-size: 0.72rem;
}

table.table-compact th,
table.table-compact td {
  padding: 6px 7px;
}

th, td {
  padding: 10px 12px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--accent-light);
  font-weight: 600;
  white-space: nowrap;
}

td:first-child,
th:first-child {
  text-align: left;
}

tr:last-child td {
  border-bottom: none;
}

tr.sep td {
  border-top: 2px solid var(--border);
}

td.na {
  color: #b0b5bc;
}

tr.ours td {
  background: #f0f7fb;
}

tr.human td {
  background: #f5f5f5;
  font-style: italic;
}

tr td.best {
  font-weight: 700;
}

tr td.second {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.table-caption {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.5;
}

/* BibTeX */
.bibtex {
  background: #1e2430;
  color: #c8d0dc;
  border-radius: var(--radius);
  padding: 20px 24px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Footer */
footer {
  text-align: center;
  padding: 32px 24px 48px;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--muted);
}

@media (max-width: 600px) {
  .hero {
    padding: 36px 16px 28px;
  }

  section {
    padding: 32px 0;
  }

  table {
    font-size: 0.78rem;
  }

  th, td {
    padding: 8px 6px;
  }
}