*{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    box-sizing: border-box;
}
body {
    margin-top: 0px;
    background: url(../img/vpon-bg.jpg);
    background-attachment: fixed;
    display: flex;
    min-height: 100vh;   
}

form {
    margin: auto;
    width: 50%;
    max-width: 500px;
    background: #F3F3F3;
    padding: 30px;
    border: 1px solid rgba(0,0,0,0.2);
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    color: rgba(0,0,0,0,2);    
}
input {
    display: block;
    padding: 10px;
    width: 100%;
    margin: 30px 0;
    font-size: 20px;
    border-radius: 5px;
}
input[type="submit"]{
    background: linear-gradient(#FFDA63, #FFB940);
    border: 0;
    color: brown;
    opacity: 0.8;
    cursor: pointer;
    margin-bottom: 0;   
}
input[type="submit"]:hover{
    opacity: 1;
    
}
input[type="submit"]:active{
    transform: scale(0.95);
    
}
@media(max-width:768px){
    form{
        width: 75%;
    }
}
@media(max-width:480px){
    form{
        width: 95%;
    }
}