:root{--bg-color: #121212;--panel-bg: #1e1e1e;--accent-primary: #8a2be2;--text-primary: #ffffff;--text-secondary: #cccccc;--border-color: #333333}*{box-sizing:border-box}body{font-family:sans-serif;background-color:var(--bg-color);color:var(--text-primary);margin:0;padding:0}#root{max-width:900px;margin:0 auto;padding:20px}h1{font-weight:700;color:var(--accent-primary);text-transform:uppercase;margin-bottom:20px}h3{color:var(--text-secondary)}.box{background:var(--panel-bg);border:2px solid var(--border-color);padding:20px;margin-bottom:20px}button{background-color:var(--accent-primary);color:#fff;border:none;padding:10px 20px;font-weight:700;cursor:pointer;margin:5px}button:hover:not(:disabled){background-color:#7020c0}button:disabled{background-color:#444;color:#888;cursor:not-allowed}button.secondary{background-color:transparent;border:2px solid var(--accent-primary);color:var(--accent-primary)}.my-video{width:100%;border:1px solid var(--border-color)}.studio-canvas{width:100%;background-color:#000;border:2px solid var(--border-color);margin-bottom:10px}.row{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}.item{background:var(--panel-bg);padding:10px;text-align:center;border:2px solid var(--border-color);position:relative;cursor:pointer}.item.selected{border-color:var(--accent-primary);background-color:#2a1a3a}.item video{width:100%;pointer-events:none}.selection-badge{position:absolute;top:5px;right:5px;background-color:var(--accent-primary);color:#fff;width:20px;height:20px;border-radius:50%;font-size:12px;line-height:20px;z-index:10}input[type=range]{width:100%;accent-color:var(--accent-primary)}hr{border:0;border-top:1px solid var(--border-color);margin:20px 0}.controls-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.stats-label{font-size:12px;color:var(--text-secondary);display:block}#background-canvas{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;pointer-events:none;opacity:.6}