:root {
  --bg: #0b0b0b;
  --fg: #eaeaea;
  --muted: #a3a3a3;
  --accent: #60a5fa;
  --card: #121212;
  --border: #222;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 16px/1.55 Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--fg);
  background: radial-gradient(1000px 600px at 50% -200px, #101826 0, #0b0b0b 60%);
  text-rendering: optimizeLegibility;
}
.container { max-width: 980px; margin: 0 auto; padding: 32px 20px 64px; }
.hero { text-align: center; margin-top: 28px; }
.avatar { border-radius: 28px; box-shadow: 0 10px 40px rgba(0,0,0,.35); }
.hero h1 { font-size: 40px; margin: 16px 0 4px; letter-spacing: .2px; }
.subtitle { color: var(--muted); margin: 0 0 8px; }
.tagline { color: var(--muted); margin: 0 0 18px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.btn { padding: 10px 16px; border-radius: 12px; background: var(--accent); color: #001727; text-decoration: none; font-weight: 600; border: 1px solid transparent; }
.btn:hover { filter: brightness(1.05); }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--border); }
.section { margin-top: 36px; }
.section h2 { font-size: 22px; margin-bottom: 8px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 16px; margin-top: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0 0 10px; color: var(--muted); }
.link { color: var(--accent); text-decoration: none; }
.link:hover { text-decoration: underline; }
.footer { margin-top: 48px; border-top: 1px solid var(--border); padding-top: 16px; color: var(--muted); text-align: center; }

@media (prefers-color-scheme: light) {
  :root { --bg: #fafafa; --fg: #0b0b0b; --muted: #555; --card: #fff; --border: #eaeaea; }
  body { background: radial-gradient(1000px 600px at 50% -200px, #eaf2ff 0, #fafafa 60%); }
  .btn { color: white; }
}