body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;
       background:#0e1117;color:#e6e9ef;font:16px -apple-system,Segoe UI,Roboto,sans-serif}
  .box{background:#171b26;border:1px solid #2a3040;border-radius:16px;padding:32px;width:320px}
  h1{margin:0 0 4px;font-size:26px}.s{color:#8b93a7;margin:0 0 20px;font-size:14px}
  input{width:100%;box-sizing:border-box;margin:6px 0;padding:12px 14px;border-radius:10px;
        border:1px solid #2a3040;background:#0b0e14;color:#e6e9ef;font:inherit}
  input:focus{outline:none;border-color:#e07a3f}
  button{width:100%;margin-top:14px;padding:13px;border:0;border-radius:10px;cursor:pointer;
        font-size:17px;font-weight:700;color:#1a1205;background:linear-gradient(90deg,#e07a3f,#f0b429)}
  .err{color:#f85149;font-size:14px;min-height:20px;margin-top:10px}