.header-container {
    grid-column: 2;
    grid-row: 1;
    position: relative;
    background: repeating-linear-gradient(
        -45deg,
        var(--stripe-color-a),
        var(--stripe-color-a) 10px,
        var(--stripe-color-b) 10px,
        var(--stripe-color-b) 20px
    );
    opacity: 0.85;
}