.matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.85);
    background-image: linear-gradient(135deg, rgba(0,0,0,0.9) 0%, rgba(20,20,40,0.7) 100%);
    filter: brightness(0.55);
}