body {
    background-size: 100%;
    font-size: 20px;
}
h1 {
    margin-top:50px;
    text-align: center;
}
form {
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    overflow: auto;
    max-width: 500px;
    height: 300px;
    margin: auto;
    border: 1px solid #fff;
    background: rgba(255,255,255,0.7);
    border-radius: 10px;
    padding: 30px;
}
.form-control {
    max-width: 457px;
    margin: 10px 0;
    font-size: 20px;
}
.buttons {
    text-align: center;
}
.logo {
    width:40px;
}