/* Retro CRT and Screen Effects */
.crt-effects {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5; /* Above canvas, below or above UI depending on preference */
    overflow: hidden;
}

/* Subtle scanline effect */
.scanlines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        rgba(18, 16, 16, 0) 50%,
        rgba(0, 0, 0, 0.15) 50%
    );
    background-size: 100% 4px;
    z-index: 2;
}

/* Screen vignette for depth */
.vignette {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
        circle,
        rgba(0, 0, 0, 0) 50%,
        rgba(0, 0, 0, 0.5) 150%
    );
    z-index: 3;
}

/* Subtle flicker animation to simulate old hardware */
@keyframes crt-flicker {
    0% { opacity: 0.99; }
    5% { opacity: 0.95; }
    10% { opacity: 0.99; }
    15% { opacity: 0.97; }
    20% { opacity: 1; }
    100% { opacity: 1; }
}

.crt-flicker {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(18, 16, 16, 0.02);
    opacity: 0.1;
    pointer-events: none;
    animation: crt-flicker 0.15s infinite;
    z-index: 4;
}