* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-family: Arial, Helvetica, sans-serif;
    height: 100%;
    width: 100%;
}

body {
    padding: 1rem;
}

.container {
    width: 100%;
    height: 90vh;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.header-footer {
    background-color: orange;
    height: 4rem;
}

.navigation {
    height: 2rem;
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    column-gap: 0.5rem;
}

.nav-item {
    background-color: black;
}


.main-content {
    display: grid;
    grid-template-rows: 1fr 1fr;
    grid-template-columns: repeat(3, 1fr);
    height: 100%;
    gap: 1rem;
}

.content {
    background-color: orange;
}

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

.content-list {
    grid-column: 3;
    display: grid;
    gap: 1rem;
    grid-template-rows: repeat(5, 1fr);
    height: 100%;
}

.list-item {
    background-color: black;
}