.matrix-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-color: black;
    overflow: hidden;
}

.matrix-column {
    position: absolute;
    top: 0;
    font-family: 'Courier New', monospace;
    line-height: 1;
    white-space: nowrap;
    animation: fall 20s linear infinite, opacityBurst 2s infinite;
}

@keyframes fall {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(100vh);
    }
}

@keyframes opacityBurst {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 1;
    }
}