*{margin:0;padding:0;box-sizing:border-box;font-family:Arial,sans-serif}body{height:100vh;display:flex;justify-content:center;align-items:center;background:linear-gradient(135deg,#4285f4,#34a853)}.login-box{background-color:#fff;padding:40px 30px;border-radius:12px;box-shadow:0 8px 25px rgba(0,0,0,.2);width:300px;text-align:center;position:relative}.login-box h2{margin-bottom:25px;color:#333}.login-box input{width:100%;padding:12px 10px;margin-bottom:15px;border:1px solid #ccc;border-radius:6px;font-size:16px}.login-box button{width:100%;padding:12px;border:none;border-radius:6px;background-color:#4285f4;color:#fff;font-size:16px;cursor:pointer;transition:background-color .2s}.login-box button:hover{background-color:#3367d6}.error-message{color:#fff;background-color:#e53935;padding:10px;border-radius:6px;margin-bottom:15px;display:none}