h2, h3, h4 {
    padding:0.5em 1em
    width:100%;
    font-size: 3em;
    text-align: center;
}
body {
    text-align:center;
}
h3 {font-size:2.4em;}
h4 {font-size: 2em;color:red;font-weight:normal}
form {
    width: 90%;
    max-width:1024px;
    margin-left: auto;
    margin-right: auto;
    border: solid 1px #2FF;
    border-radius: 1.6em;
    padding: 1em;
    text-align:center;
}
div {
    text-align:center;
}
label {
    font-weight:600;
    width: 20%;
    font-size: 2em;
    margin:0.2em;
}
input {
    margin: 0.2em;
    width: 60%;
    font-size: 2em;
}
#secret {
    width:60%;
}