틀:CRT/styles.css

.Vierthalb::after {
    content: "";
    position: absolute;

    background: repeating-linear-gradient(
        to bottom,
        rgba(0,0,0,0.35) 0px,
        rgba(0,0,0,0.35) 2px,
        transparent 2px,
        transparent 4px
    );

    animation: crt-scan 6s linear infinite;
    z-index: 5;
}

/* 줄이 아래로 흐르는 효과 */
@keyframes crt-scan {
    from {
        transform: translateY(-4px);
    }
    to {
        transform: translateY(4px);
    }
}