html, body {
    height: 100%;
    font-size: 50px;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

body {
    display: flex;
}

.container {
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80%;
    width: 90%;
}

h1, h3 {
    text-align: center;
}