body span.cart-block--summary__icon img.img-fluid.w-100 {width:20px!important;}
.cart--cart-block {top: 50px;}

fieldset#edit-login-returning-customer {
    width: 30%;
    border: 1px solid lightgray;
    border-radius: 10px;
}
span.cart-block--summary__icon img.w-100.img-fluid 
fieldset#edit-login-register {
    width: 60%;
    border: 1px solid lightgray;
    border-radius: 10px;
}