:root {
  --brand: #1E40AF;
  --text: #0F172A;
  --muted: #64748B;
  --divider: #E2E8F0;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--divider);
  margin-bottom: 2rem;
}

.brand {
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  color: var(--brand);
  text-decoration: none;
}

nav { display: flex; gap: 1.25rem; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

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

article {
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 12px;
  padding: 2rem 2rem 2.5rem;
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 2rem;
  letter-spacing: -0.01em;
}

h2 {
  margin-top: 2rem;
  font-size: 1.15rem;
  color: var(--brand);
}

p, ul { margin: 0.65rem 0; }

ul { padding-left: 1.25rem; }

a { color: var(--brand); }

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

.hero {
  text-align: center;
  padding: 3rem 1rem 2.5rem;
}

.hero h1 {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--divider);
  border-radius: 12px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
}

.card:hover { border-color: var(--brand); }

.card h3 { margin: 0 0 0.25rem; color: var(--brand); font-size: 1rem; }
.card p  { margin: 0; color: var(--muted); font-size: 0.92rem; }