:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #f0f6fc;
  --muted: #8b949e;
  --accent: #7ee787;
}
* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: inherit; }

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0;
}

.narrow { width: min(680px, calc(100% - 32px)); }

.eyebrow, .tag {
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
}

h1 {
  margin: 8px 0 12px;
  font-size: clamp(32px, 6vw, 64px);
}

.intro {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 48px;
}

.card {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease;
}

.card:hover, .card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
  outline: none;
}

.card h2 { margin: 28px 0 8px; }
.card p { margin: 0; color: var(--muted); line-height: 1.6; }
.back { display: inline-block; margin-top: 20px; color: var(--accent); }

@media (max-width: 680px) {
  .shell { padding: 48px 0; }
  .grid { grid-template-columns: 1fr; margin-top: 32px; }
}