@keyframes flicker {
    0% {
        filter: brightness(0.97);
        opacity: 0.95;
    }

    50% {
        filter: brightness(0.94);
        opacity: 0.92;
    }

    100% {
        filter: brightness(0.97);
        opacity: 0.95;
    }
}

@keyframes scanline-scroll {
    0% {
        background-position: 0 0;
    }

    100% {
        background-position: 0 100%;
    }
}

.crt-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 100000001;
    pointer-events: none;
    overflow: hidden;
}

.crt-overlay.active {
    display: block;
}

.crt-overlay.effect-vga {
    background:
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.15) 50%),
        radial-gradient(circle at center, transparent 70%, rgba(0, 0, 0, 0.2) 100%);

    background-size: 100% 3px, 100% 100%;
    opacity: 1;
    pointer-events: none;
}

.crt-overlay.effect-trinitron {
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.15) 1px, transparent 1px),
        linear-gradient(transparent calc(33% - 0.5px),
            rgba(0, 0, 0, 0.12) calc(33%),
            rgba(0, 0, 0, 0.12) calc(33% + 0.5px),
            transparent calc(33% + 1px),
            transparent calc(66% - 0.5px),
            rgba(0, 0, 0, 0.12) calc(66%),
            rgba(0, 0, 0, 0.12) calc(66% + 0.5px),
            transparent calc(66% + 1px)),
        radial-gradient(ellipse at center, transparent 50%, rgba(0, 0, 0, 0.45) 100%);

    background-size: 3px 100%, 100% 100%, 100% 100%;
    backdrop-filter: contrast(1.1) saturate(1.15) brightness(1.02);
    opacity: 1;
    pointer-events: none;
}

.crt-overlay.effect-green {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 1px, rgba(0, 60, 0, 0.4) 2px, rgba(0, 60, 0, 0.4) 3px),
        radial-gradient(circle at center, rgba(0, 255, 0, 0.03) 0%, transparent 40%, rgba(0, 30, 0, 0.8) 100%);

    background-size: 100% 3px, 100% 100%;
    backdrop-filter: sepia(100%) hue-rotate(90deg) saturate(350%) contrast(1.2);
    opacity: 1;
    animation: flicker 0.1s infinite;
    pointer-events: none;
}

.crt-overlay.effect-amber {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 1px, rgba(80, 50, 0, 0.4) 2px, rgba(80, 50, 0, 0.4) 3px),
        radial-gradient(circle at center, rgba(255, 165, 0, 0.03) 0%, transparent 40%, rgba(60, 25, 0, 0.8) 100%);

    background-size: 100% 3px, 100% 100%;
    backdrop-filter: sepia(100%) hue-rotate(-40deg) saturate(350%) contrast(1.2);
    opacity: 1;
    animation: flicker 0.1s infinite;
    pointer-events: none;
}

.crt-overlay.effect-tv {
    background:
        linear-gradient(rgba(0, 0, 0, 0) 50%,
            rgba(0, 0, 0, 0.18) 50%),
        radial-gradient(ellipse at center,
            transparent 30%,
            rgba(0, 0, 0, 0.7) 80%,
            rgba(0, 0, 0, 0.9) 100%);
    background-size: 100% 3px, 100% 100%;
    opacity: 0.82;
    animation: scanline-scroll 20s linear infinite;
    pointer-events: none;
}

#wallpaper-preview-screen.crt-active::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

#wallpaper-preview-screen.effect-vga::after {
    background:
        repeating-linear-gradient(90deg,
            rgba(255, 0, 0, 0.03) 0px,
            rgba(0, 0, 255, 0.03) 1px,
            transparent 2px,
            transparent 4px),
        linear-gradient(rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0.12) 50%),
        radial-gradient(circle at center, transparent 65%, rgba(0, 0, 0, 0.25) 100%);
    background-size: 4px 100%, 100% 2px, 100% 100%;
    opacity: 1;
}

#wallpaper-preview-screen.effect-trinitron::after {
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.15) 1px, transparent 1px),
        linear-gradient(transparent calc(33% - 0.5px),
            rgba(0, 0, 0, 0.10) calc(33%),
            rgba(0, 0, 0, 0.10) calc(33% + 0.5px),
            transparent calc(33% + 1px),
            transparent calc(66% - 0.5px),
            rgba(0, 0, 0, 0.10) calc(66%),
            rgba(0, 0, 0, 0.10) calc(66% + 0.5px),
            transparent calc(66% + 1px)),
        radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.4) 100%);
    background-size: 3px 100%, 100% 100%, 100% 100%;
    opacity: 0.9;
}

#wallpaper-preview-screen.effect-green::after {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 1px, rgba(0, 60, 0, 0.4) 2px, rgba(0, 60, 0, 0.4) 3px),
        radial-gradient(circle at center, rgba(0, 255, 0, 0.03) 0%, transparent 40%, rgba(0, 30, 0, 0.8) 100%),
        rgba(0, 255, 0, 0.15);
    background-size: 100% 3px, 100% 100%, 100% 100%;
    mix-blend-mode: hard-light;
    pointer-events: none;
}

#wallpaper-preview-screen.effect-amber::after {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 1px, rgba(80, 50, 0, 0.4) 2px, rgba(80, 50, 0, 0.4) 3px),
        radial-gradient(circle at center, rgba(255, 165, 0, 0.03) 0%, transparent 40%, rgba(60, 25, 0, 0.8) 100%),
        rgba(255, 165, 0, 0.15);
    background-size: 100% 3px, 100% 100%, 100% 100%;
    mix-blend-mode: hard-light;
    pointer-events: none;
}

#wallpaper-preview-screen.effect-tv::after {
    background:
        linear-gradient(rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0.18) 50%),
        radial-gradient(ellipse at center, transparent 25%, rgba(0, 0, 0, 0.6) 80%, rgba(0, 0, 0, 0.85) 100%);
    background-size: 100% 3px, 100% 100%;
    opacity: 0.7;
    pointer-events: none;
}