.header {
    --background-color: rgba(255, 255, 255, 1);
    --default-color: black;
    --heading-color: black;
    color: rgba(255,255,255,0.0);
    background-color: rgb(255, 255, 255, 0.7);
    padding: 5px 0;
    transition: all 0.3s;
    z-index: 997;
}