*{
    margin: 0;
    padding: 0;
    font-family: serif;
    box-sizing: border-box;
}
body{
    background: #dedede;
    display: flex;
    min-height: 100vh;
}
form{
    margin: auto;
    width: 30%;
    min-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, 0.5);
}
input{
    display: block;
    padding: 10px;
    width: 100%;
    margin: 30px 0;
    font-size: 20px;
}
input[type="submit"]{
    background: linear-gradient(#ffda69,#ffb948);
    border: 0;
    color: brown;
    opacity: 0.8;
    cursor: pointer;
    border-radius: 20px;
    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%;
    }
}