body {
    background: url("../img/bg.jpg") no-repeat center center fixed;
    background-size: cover;
}

.bg-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(
        to right,
        rgb(41 41 41 / 66%),
        rgb(217 213 213 / 70%)
    );
    z-index: 0;
}

main,
header,
footer {
    position: relative;
    z-index: 1;
}