form {
    width: 75%;
    display: block;
    margin: auto;
    overflow: hidden;
}

form.start {
    margin: 0;
}

form h2,
form h3 {
    padding: 0 20px 0 20px;
}

form > div,
form > fieldset > div > div,
form section > div {
    margin: 0 auto 30px auto;
    border-left: 5px solid transparent;
    padding: 0 20px 0 15px;
    transition: all 0.75s;
}

fieldset {
    border: none;
    padding: 0;
    margin: 0;
}

@media(max-width: 650px) {
    form {
        width: 100%;
    }
    
    form > div,
    form > fieldset > div {
        margin: 0 0 20px 0;
    }

    div.overlay > span {
        top: 4.5rem;
    }
}