Template:Navbox/styles.css

/* Responsive navigation boxes */

@media (max-width:1000px) {
    /* Immediately visible while scrolling vertically. */
    .navbox-title { text-align: left; }
    /* Enable side scrolling */
    .navbox { overflow-x: auto; }
    /* Minimum width to prevent squishing */
    .navbox-inner {  min-width: 500px; }
}

This template "Navbox/styles.css" is from Wikipedia if otherwise notified