/* crt filter */
.crt::before {
 content: " ";
display: block;
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
background:linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.03));
z-index: 400;
background-size: 100% 2px, 3px 100%;
pointer-events: none;
}
@keyframes flicker {
0% {
opacity: 0.27861;
}
5% {
opacity: 0.34769;
}
10% {
opacity: 0.23604;
}
15% {
opacity: 0.10626;
}
20% {
opacity: 0.18128;
}
25% {
 opacity: 0.10626;
}
30% {
opacity: 0.18128;
}
35% {
opacity: 0.23604;
}
}
.crt::after 
{
    content: " ";
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(18, 16, 16, 0.02);
    opacity: 0;
    z-index: 400;
    pointer-events: none;
    animation: flicker 0.2s infinite;
}