:root {
  color-scheme: light;
  --bg: #f7f7f2;
  --text: #1b1b1b;
  --muted: #5d5d5d;
  --accent: #114b5f;
  --border: #d9d9d9;
  --card: #ffffff;
  --highlight: #e7f2f5;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 1.5rem;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  text-decoration: none;
  color: var(--accent);
  font-size: 1.2rem;
}

nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
}

main h1 {
  font-size: 2.1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.card h2,
.card h3 {
  margin-top: 0;
}

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

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  padding: 1rem;
  border-left: 3px solid var(--accent);
  background: var(--highlight);
  border-radius: 8px;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-size: 0.75rem;
  margin-right: 0.5rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--card);
  margin-top: 3rem;
}

.small-muted {
  color: var(--muted);
  font-size: 0.9rem;
}

ul.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.link-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

a.external {
  color: var(--accent);
}