.center-element {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

h1 {
    font-weight: 700;
    font-size: 8em;
}

h2, h3 {
    font-weight: 300;
}

h3 {
    font-size: 2.5em;
}