:root { --bg:#0b1220; --card:#0f172a; --text:#e5e7eb; --muted:#9ca3af; --accent:#22c55e; }
* { box-sizing: border-box; }
body { margin:0; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial; background:#0b1220; color:var(--text); }
.container { max-width: 980px; margin: 0 auto; padding: 24px; }
.nav { display:flex; gap:16px; align-items:center; padding:16px 0; border-bottom: 1px solid #1f2937; }
.nav a { color: var(--text); text-decoration: none; padding: 8px 12px; border-radius: 999px; }
.nav a:hover { background: #111827; }
.card { background: var(--card); border: 1px solid #1f2937; border-radius: 16px; padding: 20px; box-shadow: 0 10px 30px rgba(0,0,0,.3); }
h1, h2, h3 { margin: 0 0 12px; line-height: 1.2; }
p { color: var(--muted); }
.btn { display:inline-block; background: var(--accent); color: #051b0e; padding: 10px 16px; font-weight: 600; border-radius: 12px; text-decoration: none; }
footer { margin-top: 48px; padding: 24px 0; border-top: 1px solid #1f2937; color: #6b7280; font-size: 14px; }