#trackingArea {
    width: 600px;
    height: 320px;
    margin: 25px auto;
    border: 2px solid var(--border-color);
    background: var(--page-bg);
    position: relative;
    overflow: hidden;
}

#trackingTarget {
    width: 30px;
    height: 30px;
    background: var(--surface-bg);
    border: 2px solid var(--border-color);
    position: absolute;
    left: 285px;
    top: 145px;
    display: none;
}

@media (max-width: 900px) {
    #trackingArea {
        width: 90%;
        height: 350px;
    }
}