:root {
  --primary: #1a4ed8;
  --text: #1f2937;
  --muted: #6b7280;
  --bg-soft: #f9fafb;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  color: var(--text);
  line-height: 1.7;
  background: white;
}

.hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(180deg, #f8fafc, white);
}

.hero h1 {
  font-size: 2.8em;
  margin-bottom: 10px;
}

.tagline {
  font-size: 1.2em;
  color: var(--muted);
  max-width: 700px;
  margin: auto;
}

.authors {
  margin-top: 15px;
  font-size: 0.95em;
  color: #374151;
}

.hero-links {
  margin-top: 25px;
}

.hero-links a {
  margin: 0 8px;
  text-decoration: none;
  font-weight: 600;
  color: var(--primary);
}

section {
  max-width: 960px;
  margin: auto;
  padding: 50px 20px;
}

h2 {
  font-size: 1.8em;
  margin-bottom: 20px;
  border-bottom: 2px solid #e5e7eb;
  padding-bottom: 6px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-soft);
  padding: 20px;
  border-radius: 10px;
}

.card h3 {
  margin-top: 0;
}

img {
  width: 100%;
  border-radius: 8px;
}

.caption {
  text-align: center;
  font-size: 0.9em;
  color: var(--muted);
  margin-top: 10px;
}

.inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
  padding: 0;
}

.inline-list li {
  background: #eef2ff;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.9em;
}

.stat {
  text-align: center;
  padding: 20px;
  background: var(--bg-soft);
  border-radius: 12px;
}

.stat .number {
  font-size: 2em;
  font-weight: bold;
  color: var(--primary);
}

.stat .label {
  display: block;
  color: var(--muted);
  margin-top: 5px;
}

.note {
  margin-top: 20px;
  color: var(--muted);
}

pre {
  background: #f6f8fa;
  padding: 20px;
  overflow-x: auto;
  border-radius: 8px;
}

footer {
  text-align: center;
  padding: 30px;
  font-size: 0.85em;
  color: var(--muted);
}