html {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

body {
    display: flex;
    flex-wrap: wrap;
}

section {
    margin: 10px 50px;
}

ul {
    list-style: none;
    padding-left: 10px;
}