html * {
    box-sizing: border-box;
}

body {
    background-color: rgb(37, 36, 62);
    line-height: 1.4em;
    color: antiquewhite;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18px;
    font-weight: 100;
    letter-spacing: 0.02em;
}

.main-parent {
    display: grid;
    grid-template-columns: 2fr 3fr;
    grid-template-rows: auto auto auto;
    gap: 1em;
}

header, footer {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 1em;
}

.image-frame {
    margin: 0;
    width: 100%;
}

.image-frame img {
    width: 50%;
}

.primary {
    grid-row: 1 / 3;
}

.secondary {
    grid-row: 2 / -1;
    grid-column: 2 / -1;
}

.tertiary {
    grid-column: 2/-1;
}