.friday13-container {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10000;
    contain: strict;
    overflow: hidden;
}

.friday13-cat {
    position: absolute;
    width: 100px;
    height: auto;
    user-select: none;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    opacity: 0;
}

@keyframes cat-walk-right {
    0% { left: -10vw; transform: scaleX(1); opacity: 1; }
    99% { left: 110vw; transform: scaleX(1); opacity: 1; }
    100% { opacity: 0; }
}

@keyframes cat-walk-left {
    0% { left: 110vw; transform: scaleX(-1); opacity: 1; }
    99% { left: -10vw; transform: scaleX(-1); opacity: 1; }
    100% { opacity: 0; }
}