header::before {
    background-color: rgba(211, 211, 211, 0.8);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.mobile-nav li {
    background-color: rgba(211, 211, 211, 0.8);
    border-top: 1px solid black;
}

.mobile-nav li:nth-last-child(1) {
    border-bottom: 1px solid black;
}