html {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

body {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-content: center;
    justify-items: center;
    align-items: center;
    margin: 0;
}

header {
    position: fixed;
    top: 0;
    left: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: row;
    align-items: center;
}

section {
    display: flex;
    flex-grow: 1;
    width: 100%;
    height: 100vh;
    flex-direction: row;
    justify-content: center;
    align-content: center;
    align-items: center;
}