:root {
    --gf-scan-opacity: 0.055;
    --gf-scan-speed: 8s;
}

#gf-scanlines {
    position: fixed;
    inset: 0;
    z-index: 9990;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 3px,
        rgba(0, 0, 0, var(--gf-scan-opacity)) 3px,
        rgba(0, 0, 0, var(--gf-scan-opacity)) 4px
    );
}

#gf-scan-sweep {
    position: fixed;
    left: 0;
    right: 0;
    height: 120px;
    z-index: 9991;
    pointer-events: none;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        rgba(57, 255, 20, 0.018) 40%,
        rgba(57, 255, 20, 0.035) 50%,
        rgba(57, 255, 20, 0.018) 60%,
        transparent 100%
    );
    animation: gf-sweep var(--gf-scan-speed) linear infinite;
    top: -120px;
}

@keyframes gf-sweep {
    0% {
        top: -120px;
    }

    100% {
        top: calc(100vh + 120px);
    }
}

#gf-vignette {
    position: fixed;
    inset: 0;
    z-index: 9989;
    pointer-events: none;
    background: radial-gradient(
        ellipse at center,
        transparent 60%,
        rgba(0, 0, 0, 0.35) 100%
    );
}