@import url('https://fonts.googleapis.com/css?family=Noto+Sans+TC&display=swap');
body {
    margin: 0;
    padding: 0;
    background: radial-gradient(#f3f1f3, #9fc7e2, #50afe6);
    height: 100vh;
    overflow: hidden;
    font-family: 'Noto Sans TC', sans-serif;
}

.center {
    width: 430px;
    top: 200px;
    left: 36%;
    position: relative;
}

.center .header {
    font-size: 28px;
    font-weight: bold;
    color: white;
    padding: 25px 0 30px 25px;
    background: #34d8eb;
    border-bottom: 1px solid #f2f4f7;
    border-radius: 5px 5px 0 0;
}

.center .form {
    position: absolute;
    background: white;
    width: 100%;
    padding: 50px 10px 0 30px;
    box-sizing: border-box;
    border: 1px solid #f5f8fa;
    border-radius: 0 0 5px 5px;
}

.form input {
    height: 50px;
    width: 90%;
    padding: 0 10px;
    border-radius: 3px;
    border: 1px solid silver;
    font-size: 18px;
    outline: none;
}

.form input[type="password"] {
    margin-top: 20px;
}

.form i {
    position: absolute;
    font-size: 25px;
    color: grey;
    margin: 15px 0 0 -45px;
}

i.fa-lock {
    margin-top: 35px;
}

.form input[type="submit"] {
    margin-top: 40px;
    margin-bottom: 40px;
    width: 130px;
    height: 45px;
    color: white;
    cursor: pointer;
    line-height: 45px;
    border-radius: 45px;
    border-radius: 5px;
    background: #34d8eb;
}

.form input[type="submit"]:hover {
    background: #2890e6;
    transition: .5s;
}

.form a {
    text-decoration: none;
    font-size: 18px;
    color: #34d8eb;
    padding: 0 0 0 20px;
}