.backdrop {position: fixed;top: 0;left: 0;width: 100%;height: 100%;background: rgba(0, 0, 0, 0.95);border: 0;display: none; } .backdrop.show {display: block; } .backdrop.backdrop-nav {z-index: 8000; } @media (min-width: 768px) {.backdrop.backdrop-nav.show {display: none;} } .backdrop.backdrop-modal {z-index: 100000; }