:root { --bg:#0b0f1a; --card:#0f1629; --text:#e6e8f0; --muted:#9aa3b2; --accent:#34d399; }
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent);text-decoration:none}
header{position:sticky;top:0;background:rgba(15,22,41,0.9);backdrop-filter:blur(8px);border-bottom:1px solid #23324d}
.nav{max-width:1100px;margin:0 auto;display:flex;gap:16px;align-items:center;justify-content:space-between;padding:14px 18px}
.nav a.brand{font-weight:700;letter-spacing:.3px}
.container{max-width:1100px;margin:24px auto;padding:0 18px}
.card{background:var(--card);border:1px solid #23324d;border-radius:18px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.row{display:grid;gap:16px}
.row.two{grid-template-columns:1fr 1fr}
.row.three{grid-template-columns:1fr 1fr 1fr}
.btn{display:inline-flex;align-items:center;gap:10px;padding:10px 14px;border-radius:12px;border:1px solid #28406b;background:#122038;color:#e6e8f0;cursor:pointer}
.btn.primary{background:linear-gradient(135deg,#2563eb,#34d399);border:0;color:white}
input,textarea,select{background:#0c1324;border:1px solid #23324d;color:#e6e8f0;border-radius:10px;padding:10px;width:100%}
footer{border-top:1px solid #23324d;margin-top:40px;color:var(--muted)}
.badge{font-size:12px;padding:4px 8px;border-radius:999px;border:1px solid #28406b;color:#cbd5e1}
.code{font-family: ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;background:#0c1324;border:1px solid #23324d;border-radius:12px;padding:12px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:900px){.row.two,.row.three,.split{grid-template-columns:1fr}}