:root{--bg: #0e0f13;--panel: #181a21;--panel-2: #20232c;--border: #2a2e3a;--text: #e7e9ee;--muted: #9aa1b1;--accent: #4f8cff;--danger: #ff4f5e;--live: #1fd07a}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border)}.topbar h1{font-size:16px;margin:0;font-weight:600}.error-banner{background:#ff4f5e1f;color:var(--danger);padding:10px 20px;border-bottom:1px solid var(--border)}.layout{display:grid;grid-template-columns:1fr 340px;gap:16px;padding:16px;flex:1;min-height:0}.stage{display:flex;flex-direction:column;align-items:center;min-width:0}.stage-main{width:min(100%,860px);min-width:360px;max-width:100%;resize:horizontal;overflow:hidden}.stage-controls{width:min(100%,860px);max-width:100%;margin-top:14px}.preview-wrap{position:relative;background:#000;border:1px solid var(--border);border-radius:10px;overflow:hidden;aspect-ratio:16 / 9;width:100%}.preview-canvas{width:100%;height:100%;display:block;touch-action:none}.preview-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;color:var(--muted)}.meter-row{display:flex;align-items:center;gap:10px;margin-top:12px;width:100%}.meter-label{color:var(--muted);width:28px}.vu{flex:1;height:10px;background:var(--panel-2);border-radius:6px;overflow:hidden}.vu-fill{height:100%;background:linear-gradient(90deg,var(--live),#f2c94c,var(--danger));transition:width 80ms linear}.panel{background:var(--panel);border:1px solid 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