:root {
  --bg: #0f1115;
  --surface: #181b22;
  --text: #e6e8ee;
  --muted: #9aa1b2;
  --accent: #4ade80;
  --border: #2a2f3a;
  --max: 46rem;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --surface: #ffffff;
    --text: #1b1e25;
    --muted: #5b6273;
    --accent: #15803d;
    --border: #dde1e8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

.site-header,
main,
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.logo {
  font: 700 1.25rem var(--mono);
  color: var(--text);
  text-decoration: none;
}
.logo span { color: var(--accent); }

nav { display: flex; gap: 1.25rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--text); }

.hero { padding: 4rem 0 3rem; }
.prompt { font-family: var(--mono); color: var(--accent); margin: 0; }
h1 { font-size: clamp(2.25rem, 7vw, 3.5rem); line-height: 1.1; margin: 0.5rem 0 1rem; }
.lead { font-size: 1.25rem; color: var(--muted); margin: 0; }

section { padding: 2rem 0; border-top: 1px solid var(--border); }
.hero { border-top: 0; }
h2 { font-size: 1.5rem; margin: 0 0 1rem; }

.cards {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
}
.cards li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
}
.cards h3 { margin: 0 0 0.25rem; font-size: 1.1rem; }
.cards p { margin: 0; color: var(--muted); }

.site-footer {
  padding-top: 2rem;
  padding-bottom: 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}