:root{font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:#0f172a;background:linear-gradient(130deg,#f8fafc,#dbeafe 45%,#e2e8f0)}*{box-sizing:border-box}body{margin:0;min-height:100vh}.page{min-height:100vh;display:grid;place-items:center;padding:24px}.card{width:100%;max-width:420px;background:#ffffffe6;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-radius:16px;padding:24px;box-shadow:0 18px 40px #0f172a26}h1{margin:0;font-size:28px}.subtitle{margin:10px 0 18px;color:#475569}.form-item{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}label{font-size:14px;color:#1f2937}input{border:1px solid #cbd5e1;border-radius:10px;padding:10px 12px;font-size:15px}input:focus{outline:2px solid #2563eb;border-color:transparent}button{width:100%;border:none;border-radius:10px;padding:11px 12px;background:#2563eb;color:#fff;font-size:15px;font-weight:600;cursor:pointer}button:disabled{opacity:.65;cursor:not-allowed}.secondary{background:#334155}.welcome{margin:8px 0 6px;font-size:16px}.desc{margin:0 0 16px;color:#475569}.error{margin:14px 0 0;color:#b91c1c;font-size:14px}