body {
    height: 100vh;
}

#main_grid {
    display: grid;
    grid-template-columns: 1fr 10fr 1fr;
    position: relative;
    margin-top: 1vw;
    height: 100%;
}

main {
    margin: 0 1.5em 0 1.5em
}

aside {

    display: flex;
    flex-direction: column;
    justify-content: space-between;

    padding: 0.5vw;

    text-align: center;

    font-size: 1.1em;
    font-family: "Caveat", cursive;
}

#leftm {
    border-right: 0.1em dashed darkgray;
}

#rightm {
   border-left: 0.1em dashed darkgray;
}

input#hide-banners:checked~div#banners {
    display: none;
}