:root {
  --bg: #041018;
  --bg-alt: #0a1a24;
  --card: #0d2230;
  --text: #e8f7ff;
  --muted: #97b9c8;
  --line: #173347;
  --accent: #13d5f3;
  --accent-strong: #0ea5c4;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 0%, #0f2e42 0%, var(--bg) 50%);
  line-height: 1.55;
}
.container { width: min(1080px, 92vw); margin: 0 auto; }
.hero { padding: 2.8rem 0 2rem; text-align: center; border-bottom: 1px solid var(--line); }
.hero-logo { width: min(560px, 92vw); display: block; margin: 0 auto 1.25rem; }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin: 0.2rem 0 0.8rem; }
.lede { color: var(--muted); max-width: 760px; margin: 0 auto; }
.subtle { color: var(--muted); font-size: 0.95rem; }
.section { padding: 2.4rem 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.grid-3 { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 1rem; }
.card h3 { margin-top: 0.2rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; justify-content: center; margin-top: 1.1rem; }
.btn {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  text-decoration: none;
  color: var(--text);
  background: #0b1f2c;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: linear-gradient(180deg, var(--accent), var(--accent-strong)); color: #002027; border: none; font-weight: 700; }
.code-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
pre {
  margin: 0.5rem 0 1.2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem;
  background: #071721;
  overflow-x: auto;
}
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }
table { width: 100%; border-collapse: collapse; margin-top: 0.8rem; }
th, td { border: 1px solid var(--line); padding: 0.55rem; text-align: left; }
th { background: #10293a; }
footer { padding: 1.3rem 0 2rem; color: var(--muted); text-align: center; }