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.slide-nav .btn-nav{pointer-events:auto}.lesson-wide .slide-pos,.lesson-canvas .slide-pos{display:none}.lesson-wide .btn-nav,.lesson-canvas .btn-nav{background:var(--card);box-shadow:0 3px 14px #23211c24}.image-viewer:active{cursor:grabbing}.image-viewer-img{position:absolute;display:block;height:auto;pointer-events:none}.video-stage{display:flex;justify-content:center;align-items:center;height:calc(100vh - 120px)}.video-slide{width:min(980px,92vw);aspect-ratio:16 / 9;border-radius:14px;overflow:hidden;box-shadow:0 2px 6px #23211c14,0 18px 48px #23211c29;background:#000}.video-frame{display:block;width:100%;height:100%;border:none}.teach-preview .video-slide{width:100%}.clip{position:relative}.clip-video{object-fit:contain;background:#000}.clip:fullscreen{border-radius:0;width:100vw}.clip-join{position:absolute;top:0;right:0;bottom:0;left:0;margin:auto;width:max-content;height:max-content;padding:14px 26px;border:none;border-radius:999px;background:var(--card);color:var(--accent);font-family:var(--sans);font-size:18px;font-weight:700;cursor:pointer;box-shadow:0 8px 28px #00000059;transition:transform .12s}.clip-join:hover{transform:scale(1.04)}.clip-join:focus-visible{outline:3px solid var(--accent-soft);outline-offset:3px}.clip-waiting{position:absolute;left:50%;bottom:64px;transform:translate(-50%);padding:8px 16px;border-radius:999px;background:#141310b8;color:#fffdf8;font-family:var(--sans);font-size:15px;pointer-events:none}.clip-bar{position:absolute;right:12px;bottom:12px;display:flex;align-items:center;gap:6px;padding:6px 8px;border-radius:999px;background:#14131099;opacity:.35;transition:opacity .15s}.clip:hover .clip-bar,.clip-bar:focus-within{opacity:1}.clip-btn{border:none;background:transparent;color:#fffdf8;font-size:16px;line-height:1;padding:4px 6px;border-radius:6px;cursor:pointer}.clip-btn:hover{background:#ffffff24}.clip-btn:focus-visible{outline:2px solid #fffdf8}.clip-volume{width:90px;accent-color:#fffdf8;cursor:pointer}.teach-file{padding:8px}.teach-file::file-selector-button{font-family:var(--sans);font-size:14px;font-weight:600;color:var(--accent);background:transparent;border:1.5px solid var(--accent);border-radius:8px;padding:7px 14px;margin-right:12px;cursor:pointer}.teach-file::file-selector-button:hover{background:var(--accent-soft)}.teach-open{text-decoration:none;display:inline-flex;align-items:center}.btn-nav-spacer{min-width:90px}.remote-ghost{position:absolute;transform:translate(-50%,-50%);pointer-events:none;z-index:30;display:flex;flex-direction:column;align-items:center;gap:3px}.chip-remote{border-color:#8a63b8;color:#5b3d85;box-shadow:0 8px 24px #5a3d854d;transform:rotate(2deg);cursor:default}.remote-tag{font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:#8a63b8;background:#f1eaf9;padding:2px 8px;border-radius:999px}