:root {
  --maize: #ffcb05;
  --blue: #00274c;
  --accent: #2b6cb0;
  --ink: #1a202c;
  --muted: #4a5568;
  --bg: #ffffff;
  --soft: #f5f7fa;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--blue) 0%, #013a6b 100%);
  color: #fff;
  padding: 56px 0 48px;
  text-align: center;
  border-bottom: 6px solid var(--maize);
}
.hero .title {
  font-size: 2.4rem;
  margin: 0 0 8px;
  line-height: 1.15;
}
.hero .subtitle {
  font-size: 1.2rem;
  font-weight: 400;
  margin: 0 auto 24px;
  max-width: 700px;
  color: #d6e2f0;
}
.authors {
  font-size: 1.05rem;
  margin: 8px 0 4px;
  color: var(--maize);
}
.authors a { color: var(--maize); text-decoration: none; }
.authors a:hover { text-decoration: underline; }
.affiliation { color: #b9c7d8; margin: 0 0 24px; font-size: 0.95rem; }
.affiliation a { color: #b9c7d8; }

/* Buttons */
.buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.button {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  padding: 9px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: background 0.15s ease, transform 0.15s ease;
}
.button:hover { background: var(--maize); color: var(--blue); transform: translateY(-1px); }

/* Main */
main { padding: 40px 0 16px; }
section { margin: 36px 0; }
h2 {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--border);
  padding-bottom: 6px;
  margin-bottom: 16px;
}
p, li { color: var(--ink); }
a { color: var(--accent); }

.warning {
  background: #fff5f5;
  border: 1px solid #fc8181;
  color: #9b2c2c;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.92rem;
  margin-top: 24px;
}

/* Teaser */
.teaser { margin: 28px 0 8px; text-align: center; }
.teaser img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}
.teaser figcaption {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 12px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* Lists */
ul { padding-left: 22px; }
li { margin: 8px 0; }

/* BibTeX */
pre {
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-size: 0.86rem;
}
code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; }

/* Footer */
footer {
  background: var(--soft);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 24px 0;
  margin-top: 40px;
  font-size: 0.85rem;
  color: var(--muted);
}

@media (max-width: 600px) {
  .hero .title { font-size: 1.8rem; }
  .hero .subtitle { font-size: 1rem; }
}