:root {
  color-scheme: light;
  --bg: #f4f1ea;
  --paper: #fffdf8;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #d6d3d1;
  --accent: #0f766e;
  --accent-ink: #ecfeff;
  --shadow: 0 18px 40px rgba(28, 25, 23, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.12), transparent 28rem),
    linear-gradient(180deg, #f7f4ed 0%, var(--bg) 100%);
}

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

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.hero {
  background: linear-gradient(135deg, rgba(255, 253, 248, 0.96), rgba(236, 253, 245, 0.88));
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 28px;
  padding: 32px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 700;
}

h1, h2 {
  font-family: "IBM Plex Serif", Georgia, serif;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
}

.lede {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-block;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.card ul {
  margin: 0;
  padding-left: 20px;
  line-height: 1.65;
}

pre {
  margin: 0;
  overflow: auto;
  padding: 14px;
  border-radius: 16px;
  background: #1c1917;
  color: #f5f5f4;
}

code {
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
}

@media (max-width: 640px) {
  .shell {
    padding: 24px 14px 48px;
  }

  .hero,
  .card {
    border-radius: 20px;
  }
}