body::before { content: " "; display: block; position: fixed; top: 100; left: 0; bottom: 0; right: 0; background: linear-gradient(rgb(0 0 0 / 30%) 50%, rgb(0 0 0 / 0%) 50%); z-index: 2; background-size: 100% 2px, 3px 100%; pointer-events: none; }