/* Only the existing video-hub lesson player. No site chrome changes. */
.vt-lesson iframe.vt-youtube{display:block;width:100%;height:auto;aspect-ratio:9/16;max-height:760px;border:0;border-radius:18px;background:#111}.vt-lesson iframe.vt-youtube:focus-visible{outline:3px solid var(--accent);outline-offset:4px}@media(max-width:700px){.vt-lesson iframe.vt-youtube{max-height:660px}}