.alert{
    position:fixed;
    z-index:99999;
    top:50%;left:50%;
    margin:-10vw 0 0 -25vw; 
    height:auto;width:50vw;
    text-align:center;
    font-size:1vw;border:1px solid #ccc;
    box-shadow: 0 0px 30px rgba(0,0,0,0.5);
    background-color:white;
    display:none;
}
.alert input {padding:0.1vw;}
.alert-inner{padding:5vw;}