header {
    aspect-ratio: 4/1;

    display: flex;
    justify-content: center;
    align-items: center;

    background-image: var(--header-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

header h1 {
    color: white;
    font-size: 10vw;
}