.c_register {
    border: 1px solid black;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 30px 50px;
    background: white;
}

body {
    height: 100%;
    width: 100%;
    background-image: url('../imgs/07.jpg');
    background-size: 100% 100%;
    background-repeat: no-repeat;
    background-attachment: fixed
}