:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #15202b;
  --muted: #5b6b7c;
  --line: #d8e0e8;
  --accent: #1a5f7a;
  --accent-soft: #e6f2f6;
  --max: 44rem;
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--card);
  margin-bottom: 1.75rem;
}

header.site .wrap {
  padding-top: 1rem;
  padding-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: baseline;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.05rem;
}

.brand span { color: var(--accent); font-weight: 600; }

nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  margin-left: 0.85rem;
}

nav a:hover { color: var(--accent); }

h1 {
  font-size: 1.75rem;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.65rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.05rem;
  margin: 1.35rem 0 0.4rem;
}

p, li { color: var(--ink); }
.lede, .muted { color: var(--muted); }

.lede { margin-top: 0; font-size: 1.05rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  margin: 1rem 0;
}

a.card.list-item {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

a.card.list-item:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(26, 95, 122, 0.08);
}

a.card.list-item h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  color: var(--accent);
}

a.card.list-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  margin: 0 0 0.75rem;
}

ul.clean {
  padding-left: 1.15rem;
  margin: 0.5rem 0 1rem;
}

ul.clean li { margin: 0.35rem 0; }

.resource {
  margin: 1rem 0;
  padding-left: 0.85rem;
  border-left: 3px solid var(--accent);
}

.resource a { font-weight: 600; }

footer.site {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--muted);
}

.subtitle { margin: -0.25rem 0 1rem; font-size: 1.25rem; font-weight: 600; color: var(--text, inherit); }