* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-size: 10px;
    font-family: 'lato', Arial, Helvetica, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

    background: linear-gradient(to left,  red, pink);
    background: -webkit-linear-gradient(right, red, pink);
    background: -moz-linear-gradient(right,  red, pink);
    background: -o-linear-gradient(right, red, pink);
    background: -ms-linear-gradient(right, red, pink);
}


.container {
    display: flex;
    flex-direction: column;
    text-align: center;
    height: 40rem;
    min-width: 30rem;
    align-items: center;
}

.container label {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.container #dob {
    margin-bottom: 3rem;
}

.desc, p {
    font-size: 2rem;
    margin-bottom: 4rem;
}

.age {
    font-size: 3rem;
}

.age > span, p {
    font-weight: bold;
}

.error {
    display: none;
    font-size: 4rem;
}