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