*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;background:#0f172a;color:#e2e8f0}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#111827;border-bottom:1px solid #1f2937}
.topbar .brand{font-weight:700}
.topbar a{color:#9ca3af;margin-left:12px;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{display:block;background:#111827;border:1px solid #1f2937;border-radius:10px;padding:16px;color:#e5e7eb;text-decoration:none}
.card h3{margin:4px 0 8px}
.auth form{max-width:360px;margin:40px auto;background:#111827;border:1px solid #1f2937;border-radius:10px;padding:16px}
label{display:block;margin:10px 0}
input{width:100%;padding:10px;border-radius:8px;border:1px solid #374151;background:#0b1220;color:#e5e7eb}
button{padding:10px 14px;border-radius:8px;border:0;background:#2563eb;color:#fff;cursor:pointer}
.center{text-align:center;margin-top:60px}