body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.08) 2px,
            rgba(0, 0, 0, 0.08) 4px
        );
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 9998;
    pointer-events: none;
    background: radial-gradient(
        ellipse at center,
        transparent 80%,
        rgba(0, 0, 0, 0.2) 100%
    );
}

html {
    animation: crtFlicker 0.1s infinite alternate;
}

html::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 9997;
    pointer-events: none;
    background: radial-gradient(
        circle at center,
        rgba(18, 255, 128, 0.02) 0%,
        transparent 70%
    );
    mix-blend-mode: screen;
}

@keyframes crtFlicker {
    0%   { opacity: 1; }
    50%  { opacity: 0.998; }
    100% { opacity: 0.999; }
}