Login Form HTML & CSS Desain Ketiga: https://www.duniacara.com/cara-membuat-login-form-dengan-html-dan-css-desain-3/

style.css

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

body{
    background: #e9cd00;
}

h1{
    color: #fffce6;
    margin-top: 64px;
    font-size: 28px;
}

a{
    text-decoration: none;
}

div.konten{
    background: #ffffff;
    width: 380px;
    margin: 20px auto 10px;
    border-radius: 5px;
    overflow: hidden;
}

.tengah{
    text-align: center;
}

.jarakatas30{
    margin: 30px 0;
}

div.kiri{
    float: left;
}

div.kanan{
    float: right;
}

span{
    font-size: 13px;
}

/**
*   Desain Bagian Atas
*
 */


div.atas{
    height: 290px;
    padding: 30px 30px 0;
}

div.grup{
    margin: 10px 0;
}

a.a{
    font-size: 13px;
    color: #808080;
}

a.a.garisbawah{
    text-decoration: underline;
}

a.a.tombol{
    font-size: 14px;
    padding: 0 7px;
    border-radius: 3px;
    color: #ffffff;
    display: inline-block;
    line-height: 28px;
    width: 49.3%;
}

a.a.facebook{
    background: #405598;
}

a.a.facebook:hover{
    background: #35467e;
}

a.a.twitter{
    background: #01afee;
}

a.a.twitter:hover{
    background: #0195cb ;
}

a.a i{
    margin-right: 10px;
}

form{
    margin: 20px 0;
}

input[type="text"],
input[type="password"]{
    width: 100%;
    height: 30px;
    padding: 0 10px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    color: #454545;
}

input[type="text"]:focus,
input[type="password"]:focus{
    border: 1px solid #e9cd00;
}

button.tombol{
    color: #ffffff;
    width: 88px;
    height: 28px;
    border: none;
    font-weight: bold;
    cursor: pointer;
}

button.tombol.kirim{
    background: #e9cd00;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
}

button.tombol.kirim:hover{
    background: #ccb400;
}

button.tombol.hapus{
    background: #01afee;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
}

button.tombol.hapus:hover{
    background: #0195cb;
}

input[type="checkbox"]{
    cursor: pointer;
    float: left;
    margin:2px 4px 0 0;
}

/**
*   Desain Bagian Bawah
*
 */

div.bawah{
    height: 60px;
    background: #01afee;
}


span.info{
    color: #e6f8ff;
    line-height: 60px;
}