:root { --bg:#0b0e14; --fg:#e6e6e6; --muted:#94a3b8; --acc:#7dd3fc; --card:#111827; }
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Apple SD Gothic Neo,Malgun Gothic,sans-serif;background:var(--bg);color:var(--fg);line-height:1.6}
a{color:var(--acc);text-decoration:none} a:hover{text-decoration:underline}
.container{max-width:960px;margin:0 auto;padding:24px}
.nav{display:flex;justify-content:space-between;align-items:center;margin-top:4px}
.brand{font-weight:700;font-size:18px}
.nav-links a{margin-left:16px}
.hero{padding:56px 0 24px}
h1{font-size:40px;margin:0 0 8px}
.lead{font-size:18px;color:var(--muted);margin:0 0 16px}
.cta .btn{margin-right:8px}
.btn{display:inline-block;padding:10px 16px;border-radius:10px;background:#1f2937;color:#fff;border:1px solid #374151}
.btn.ghost{background:transparent}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:24px 0 8px}
.card{background:var(--card);border:1px solid #1f2937;border-radius:16px;padding:16px}
h2{margin-top:40px}
.list{padding-left:18px}
.form{display:grid;gap:12px;max-width:560px}
input,textarea{width:100%;padding:10px;border-radius:10px;border:1px solid #334155;background:#0f172a;color:#e5e7eb}
button.btn{cursor:pointer}
.highlight{background:linear-gradient(90deg,#22d3ee33,#a78bfa33);padding:0 6px;border-radius:8px}
.footer{opacity:.8;margin-top:24px;border-top:1px solid #1f2937;padding-top:16px}
.muted{color:var(--muted)}
@media (prefers-color-scheme: light){
  :root{ --bg:#ffffff; --fg:#0b0e14; --muted:#475569; --acc:#0369a1; --card:#f8fafc;}
  body{background:#fff;color:#0b0e14}
  .btn{background:#0b0e14;border-color:#0b0e14}
  input,textarea{background:#fff;color:#0b0e14;border-color:#cbd5e1}
  .footer{border-top-color:#e2e8f0}
}