:root{--bg:#0f172a;--card:#111827;--text:#e5e7eb;--muted:#94a3b8;--accent:#38bdf8}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;background:linear-gradient(180deg,#0b1220,#0f172a);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1000px;margin:0 auto;padding:24px}
.site-header{position:sticky;top:0;background:rgba(15,23,42,.8);backdrop-filter:blur(8px);border-bottom:1px solid #1f2937;z-index:10}
.nav{display:flex;align-items:center;gap:16px;justify-content:space-between;padding:14px 24px}
.brand{font-weight:700;letter-spacing:.3px}
.nav-links{display:flex;gap:14px;align-items:center}
.btn{display:inline-block;border:1px solid #1f2937;background:#0b1220;border-radius:10px;padding:8px 12px}
main{flex:1}
.card{background:var(--card);border:1px solid #1f2937;border-radius:16px;padding:20px}
.grid{display:grid;gap:16px}
@media(min-width:720px){.grid{grid-template-columns:repeat(2,1fr)}}
.footer{border-top:1px solid #1f2937;padding:24px;text-align:center;color:var(--muted)}
.code{font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;background:#0b1220;padding:2px 6px;border-radius:6px;border:1px solid #1f2937}