html {
    height: 100%;
}

body {
    min-height: 100%;
    margin: 0;
}

body {
    display: grid;
    grid-template-rows: 10vh auto;
    grid-template-columns: auto;
    grid-template-areas:
    "header"
    "main";
}

header {
    grid-area: header;
    display: flex;
    justify-content: center;
}

main {
    grid-area: main;
    display: flex;
    justify-content: space-around;
    flex-direction: column;
}