*{
   margin: 0;
   padding: 0;
   font-family: sans-serif;
   box-sizing: border-box;
}

body {
    background: #85c1f2;
    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(0,0,0,0.5); 
}
 
input {
    display: block;
    padding: 10px;
    width: 100%;
    margin:30px 0;
    font-size: 20px;
}
input [type="submit"]{
    background: linear-gradient(#ffDA63,#FFB940);
    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%;
    }
}