*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:#f5f5f5;display:flex;justify-content:center;align-items:center;min-height:100vh}
.login{background:#fff;padding:40px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.1);width:360px}
.login h2{text-align:center;margin-bottom:24px}
.login input{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;margin-bottom:16px}
.login button{width:100%;padding:10px;background:#3498db;color:#fff;border:none;border-radius:4px;font-size:14px;cursor:pointer}
.login button:hover{background:#2980b9}
.msg{color:#e74c3c;font-size:13px;text-align:center;margin-top:8px;min-height:20px}