@keyframes flicker {
    0% {
        opacity: 0.27861;
    }

    5% {
        opacity: 0.34769;
    }

    10% {
        opacity: 0.23604;
    }

    15% {
        opacity: 0.90626;
    }

    20% {
        opacity: 0.18128;
    }

    25% {
        opacity: 0.83891;
    }

    30% {
        opacity: 0.65583;
    }

    35% {
        opacity: 0.67807;
    }

    40% {
        opacity: 0.26559;
    }

    45% {
        opacity: 0.84693;
    }

    50% {
        opacity: 0.96019;
    }

    55% {
        opacity: 0.08594;
    }

    60% {
        opacity: 0.20313;
    }

    65% {
        opacity: 0.71988;
    }

    70% {
        opacity: 0.53455;
    }

    75% {
        opacity: 0.37288;
    }

    80% {
        opacity: 0.71428;
    }

    85% {
        opacity: 0.70419;
    }

    90% {
        opacity: 0.7003;
    }

    95% {
        opacity: 0.36108;
    }

    100% {
        opacity: 0.24387;
    }
}

.crt::after {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(18, 16, 16, 0.1);
    opacity: 0;
    z-index: 2;
    pointer-events: none;
    animation: flicker 0.15s infinite;
}

.crt::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    z-index: 2;
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
}