*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f1117;--surface:#1a1d27;--surface-hover:#22263a;--border:#2e3247;--accent:#6366f1;--accent-hover:#818cf8;--text:#e2e8f0;--text-muted:#94a3b8;--green:#22c55e;--amber:#f59e0b;--red:#ef4444;--radius:12px;--radius-sm:8px;font-family:Inter,Segoe UI,system-ui,sans-serif}body{background:var(--bg);color:var(--text);min-height:100vh;line-height:1.5}#root{max-width:1100px;margin:0 auto;padding:2rem 1.5rem 4rem}.app-header{text-align:center;margin-bottom:2.5rem}.app-header h1{letter-spacing:-.02em;font-size:1.75rem;font-weight:700}.app-header p{color:var(--text-muted);margin-top:.4rem;font-size:.95rem}.panels-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;display:grid}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;gap:1rem;padding:1.5rem;display:flex}.panel-header{align-items:center;gap:.6rem;display:flex}.panel-icon{font-size:1.4rem;line-height:1}.panel-title{flex:1;font-size:1.1rem;font-weight:600}.device-count{background:var(--border);color:var(--text-muted);border-radius:99px;padding:2px 8px;font-size:.75rem}.device-selector{flex-direction:column;gap:.35rem;display:flex}.selector-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem;font-weight:500}.device-list{border:1px solid var(--border);border-radius:var(--radius-sm);max-height:160px;list-style:none;overflow:hidden auto}.device-list-item{cursor:pointer;border-bottom:1px solid var(--border);color:var(--text);-webkit-user-select:none;user-select:none;align-items:center;gap:.6rem;padding:.55rem .75rem;font-size:.875rem;transition:background .12s;display:flex}.device-list-item:last-child{border-bottom:none}.device-list-item:hover:not(.device-list-item--disabled):not(.device-list-item--selected){background:var(--surface-hover)}.device-list-item--selected{background:color-mix(in srgb, var(--accent) 15%, transparent);color:var(--accent-hover)}.device-list-item--disabled{opacity:.5;cursor:not-allowed}.device-list-indicator{border:2px solid var(--border);border-radius:50%;flex-shrink:0;width:8px;height:8px;transition:background .12s,border-color .12s}.device-list-item--selected .device-list-indicator{background:var(--accent);border-color:var(--accent)}.device-list-name{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.device-list-empty{color:var(--text-muted);padding:.6rem .75rem;font-size:.875rem;font-style:italic}.test-row{gap:.75rem;display:flex}.test-btn{border-radius:var(--radius-sm);cursor:pointer;border:none;flex:1;padding:.6rem 1.2rem;font-size:.9rem;font-weight:600;transition:background .15s,opacity .15s}.test-btn--start{background:var(--accent);color:#fff}.test-btn--start:hover:not(:disabled){background:var(--accent-hover)}.test-btn--stop{background:var(--red);color:#fff}.test-btn--stop:hover:not(:disabled){background:#f87171}.test-btn:disabled{opacity:.4;cursor:not-allowed}.waveform-wrapper{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);height:72px;transition:border-color .2s;overflow:hidden}.waveform-wrapper--active{border-color:var(--accent)}.waveform-canvas{width:100%;height:100%;display:block}.tone-indicator{color:var(--text-muted);align-items:center;gap:.6rem;font-size:.85rem;animation:.2s fadeIn;display:flex}.tone-dot{background:var(--green);border-radius:50%;width:10px;height:10px;animation:1.2s ease-in-out infinite pulse;display:inline-block}.video-wrapper{aspect-ratio:16/9;background:var(--bg);border-radius:var(--radius-sm);border:1px solid var(--border);position:relative;overflow:hidden}.video-wrapper--active{border-color:var(--accent)}.video-preview{object-fit:cover;width:100%;height:100%;display:block}.video-placeholder{color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:.5rem;font-size:.85rem;display:flex;position:absolute;inset:0}.video-placeholder span{opacity:.3;font-size:2.5rem}.permission-gate{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:1.25rem;min-height:50vh;padding:2rem;display:flex}.permission-gate h2{font-size:1.35rem;font-weight:600}.permission-gate p{color:var(--text-muted);max-width:420px}.permission-btn{background:var(--accent);color:#fff;border-radius:var(--radius-sm);cursor:pointer;border:none;padding:.75rem 2rem;font-size:1rem;font-weight:600;transition:background .15s}.permission-btn:hover{background:var(--accent-hover)}.error-msg{color:var(--red);border-radius:var(--radius-sm);background:#1c0a0a;border:1px solid #7f1d1d;padding:.5rem .75rem;font-size:.8rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.35}}