/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --serif: 'Crimson Pro', 'Georgia', serif;
  --sans: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Courier New', monospace;
  --accent: #2c5f8a;
  --accent-light: #e8f0f7;
  --text: #1a1a1a;
  --muted: #555;
  --border: #ddd;
  --bg: #fafafa;
  --max-w: 760px;
}

html { font-size: 18px; scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ===== Header ===== */
#masthead {
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: white;
  position: sticky;
  top: 0;
  z-index: 10;
}

#masthead h1 { font-family: var(--serif); font-size: 1.25rem; font-weight: 600; }
#masthead h1 a { color: var(--text); }
#masthead nav { display: flex; gap: 1.5rem; font-size: 0.85rem; color: var(--muted); }
#masthead nav a { color: var(--muted); }
#masthead nav a:hover { color: var(--accent); text-decoration: none; }

/* ===== Main ===== */
main {
  flex: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  width: 100%;
}

/* ===== Paper Title Block ===== */
#paper-title-wrapper {
  text-align: center;
  margin-bottom: 2.5rem;
}

#paper-title-wrapper h1 {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1.2rem;
  color: var(--text);
}

#author-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.author { white-space: nowrap; }
.self-author {
  font-weight: 600;
  color: var(--text);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 1px;
}

#venue {
  font-size: 0.9rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 0.5rem;
}

/* ===== Teaser Figure ===== */
.teaser-fig {
  margin: 2rem 0;
  text-align: center;
}

.teaser-fig img {
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.teaser-fig figcaption {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.6rem;
  font-style: italic;
}

/* ===== Sections ===== */
main h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 2.2rem 0 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

main p { margin-bottom: 1rem; color: var(--text); }

/* ===== Callout ===== */
.callout {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  padding: 0.9rem 1.1rem;
  margin: 1.2rem 0;
  font-size: 0.95rem;
}

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; margin: 1rem 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

thead th {
  background: var(--accent);
  color: white;
  padding: 0.55rem 0.8rem;
  text-align: left;
  font-weight: 500;
}

tbody tr:nth-child(even) { background: #f0f4f8; }
tbody td { padding: 0.5rem 0.8rem; border-bottom: 1px solid #e5e5e5; }

.best { font-weight: 700; color: #1a6e2e; }

/* ===== Design Axes ===== */
.axes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

.axis-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
}

.axis-card h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.axis-card ul {
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.axis-card li { margin-bottom: 0.2rem; }

/* ===== Materials Links ===== */
#paper-materials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1rem 0;
}

#paper-materials a div {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  font-size: 0.88rem;
  color: var(--accent);
  transition: background 0.15s, color 0.15s;
}

#paper-materials a:hover div {
  background: var(--accent);
  color: white;
  text-decoration: none;
}

/* ===== BibTeX ===== */
.bibtex-wrapper {
  background: #1e1e2e;
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  margin: 0.75rem 0;
}

.bibtex-wrapper pre {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: #cdd6f4;
  white-space: pre;
  margin: 0;
  line-height: 1.6;
}

/* ===== Footer ===== */
footer {
  background: white;
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--muted);
}

#footer-left { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-icons { display: flex; gap: 0.9rem; }

.footer-icons a {
  color: var(--muted);
  font-size: 1rem;
  transition: color 0.15s;
}

.footer-icons a:hover { color: var(--accent); }

#footer-right { text-align: right; line-height: 1.5; }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  #masthead { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
  #masthead nav { gap: 0.8rem; flex-wrap: wrap; }
  #paper-title-wrapper h1 { font-size: 1.5rem; }
  .axes-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
  #footer-right { text-align: left; }
}