:root{--bg:#0f172a;--card:#111827;--border:#334155;--text:#e5e7eb;--muted:#94a3b8;--accent:#38bdf8;--green:#22c55e;--red:#ef4444}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#1e3a8a 0,#0f172a 45%,#020617 100%);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--text);padding:20px}.card{width:100%;max-width:460px;background:rgba(17,24,39,.94);border:1px solid var(--border);border-radius:20px;padding:30px;box-shadow:0 24px 80px rgba(0,0,0,.35)}h1{margin:0 0 8px;font-size:26px}.desc{margin:0 0 22px;color:var(--muted)}.desc.small{margin-top:-16px;font-size:13px}.hint{margin:0 0 14px;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:#020617;color:#cbd5e1;font-size:13px}label{display:block;margin:16px 0 8px;color:#cbd5e1;font-weight:600}input{width:100%;height:46px;border:1px solid var(--border);border-radius:12px;background:#020617;color:var(--text);padding:0 14px;font-size:15px;outline:none}input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(56,189,248,.18)}button{width:100%;height:46px;margin-top:20px;border:0;border-radius:12px;background:linear-gradient(135deg,#38bdf8,#6366f1);color:white;font-weight:700;font-size:15px;cursor:pointer}.ghost{width:auto;height:36px;margin:0;background:#1f2937;padding:0 14px}.topbar{display:flex;gap:16px;align-items:flex-start;justify-content:space-between}.alert{border-radius:12px;padding:12px 14px;margin:14px 0}.success{background:rgba(34,197,94,.14);border:1px solid rgba(34,197,94,.35);color:#bbf7d0}.error{background:rgba(239,68,68,.14);border:1px solid rgba(239,68,68,.35);color:#fecaca}.info{display:grid;gap:10px;margin:18px 0;padding:14px;border:1px solid var(--border);border-radius:14px;background:#020617}.info div{display:flex;justify-content:space-between;gap:12px}.info span{color:var(--muted)}.info strong{text-align:right}