/* scanlines */
.lines {
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 999;
    opacity: 0.05;
}

.lines:before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, .5) 51%);
    background-size: 100% 2px;
    will-change: background, background-size; animation: scanlines 0.5s linear infinite;
}

@keyframes scanlines {
    from {
    background: linear-gradient(to bottom, transparent 10%, rgba(0, 0, 0, .5) 51%); background-size: 100% 2.5px; }
    to {
    background: linear-gradient(to bottom, rgba(0, 0, 0, .5) 50%, transparent 51%);
    background-size: 100% 2.5px;
    }
}
/* scanlines end */