body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 100%;
    line-height: 144%;
    margin: 0;
}

header {
    min-height: 30vh;
    background-color: #deb;
    /*display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;*/
    grid-column: 1 / -1;
    display: grid;
    grid-area: hdr;
    grid-template-columns: repeat(1, 1fr);
    gap: 1em;
    padding: 1em;
}

nav {
    grid-column: -2 / -1;
}

main {
    /*grid-column: 1 / -1;*/
    grid-area: mn;
}

footer {
    /*grid-column: span 12;*/
    grid-area: ftr;
}

aside {
    grid-area: asd;
}

.grid-main {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(4, auto);
    grid-template-areas:
        "hdr hdr hdr hdr hdr hdr hdr hdr hdr hdr hdr hdr"
        "asd asd asd asd asd asd asd asd asd asd asd asd "
        "mn  mn  mn  mn  mn  mn  mn  mn  mn  mn  mn  mn "
        "ftr ftr ftr ftr ftr ftr ftr ftr ftr ftr ftr ftr";
    gap: 1em;
    padding: 1em;
}

.grid-parent {
    background-color: #eee;
    display: grid;
    /*grid-template-columns: repeat(1, minmax(200px, 1fr));*/
    grid-template-columns: subgrid;
    gap: 1em;
    padding: 1em;
}

.card {
    background-color: #ba98;
    padding: .5em;
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
}

@media (min-width: 550px) {
    .card {
        grid-column: span 6;
    }
}

@media (min-width: 750px) {
    .card {
        grid-column: span 4;
    }
}


@media (min-width: 950px) {
    .card {
        grid-column: span 3;
    }
}

@media (min-width: 1250px) {
    .card {
        grid-column: span 2;
    }
}