:root {
            --bg-color: #1a1a1a;
            --panel-bg: #2b2b2b;
            --text-main: #e0e0e0;
            --text-muted: #888888;
            --accent: #ff7b00;
            --filter-color: #e74c3c;
            --hp-filter-color: #3498db;
            --env-color: #9b59b6;
            --lfo-color: #f1c40f;
            --delay-color: #1abc9c;
            --reverb-color: #8e44ad;
            --noise-color: #95a5a6;
            --sine-color: #4fc3f7;
            --master-color: #2ecc71;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            margin: 0;
            padding: 15px;
            display: flex;
            justify-content: center;
            min-height: 100vh;
            outline: none;
        }

        body:not(.expert-mode) .expert-only {
            display: none !important;
        }

        .container {
            max-width: 1200px;
            width: 100%;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .header {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        h1 {
            margin: 0;
            color: var(--accent);
            font-weight: 600;
            font-size: 24px;
        }

        p.intro {
            margin: 0;
            color: var(--text-muted);
            font-size: 13px;
        }
        
        .cloud-status {
            font-size: 11px;
            color: #888;
            display: flex;
            align-items: center;
            gap: 5px;
            margin-top: -2px;
        }
        
        .cloud-indicator {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #f39c12; 
        }
        
        .cloud-indicator.connected {
            background-color: #2ecc71;
            box-shadow: 0 0 5px rgba(46, 204, 113, 0.5);
        }
        
        .cloud-indicator.local-storage {
            background-color: #3498db;
            box-shadow: 0 0 5px rgba(52, 152, 219, 0.5);
        }

        .preset-toolbar {
            display: flex;
            align-items: center;
            gap: 12px;
            background-color: var(--panel-bg);
            padding: 10px 15px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            border: 1px solid #333;
            flex-wrap: wrap;
        }

        .preset-select {
            flex: 1;
            min-width: 180px;
            max-width: 250px;
            background: #111;
            color: var(--text-main);
            border: 1px solid #444;
            padding: 6px 10px;
            border-radius: 4px;
            font-family: inherit;
            font-size: 13px;
            outline: none;
            cursor: pointer;
        }
        
        .preset-select:focus {
            border-color: var(--accent);
        }

        .preset-btn {
            background-color: #3a3a3a;
            color: var(--text-main);
            border: none;
            padding: 6px 15px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            flex: none;
        }

        .preset-btn:hover {
            background-color: var(--accent);
            color: #111;
        }
        
        .preset-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .share-btn {
            background-color: rgba(52, 152, 219, 0.15);
            border: 1px solid #3498db;
            color: #3498db;
        }
        
        .share-btn:hover {
            background-color: #3498db;
            color: #111;
        }

        .expert-toggle-btn {
            background-color: rgba(142, 68, 173, 0.2);
            border: 1px solid var(--reverb-color);
            color: #d2b4de;
            margin-left: auto;
        }

        .expert-toggle-btn:hover {
            background-color: var(--reverb-color);
            color: white;
        }

        .synth-dashboard {
            display: grid;
            grid-template-columns: 1fr 1.1fr 1fr;
            gap: 15px;
            align-items: stretch;
            transition: all 0.3s ease;
            min-height: 580px;
        }

        .synth-col {
            background-color: var(--panel-bg);
            border-radius: 10px;
            padding: 15px;
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .canvas-container {
            position: relative;
            width: 100%;
            height: 135px;
            background-color: #111;
            border-radius: 6px;
            overflow: hidden;
            border: 1px solid #333;
        }

        canvas {
            display: block;
            width: 100%;
            height: 100%;
        }

        .canvas-label {
            position: absolute;
            top: 6px;
            left: 8px;
            font-size: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: rgba(255, 255, 255, 0.5);
            pointer-events: none;
        }

        .button-group {
            display: flex;
            gap: 5px;
            flex-wrap: wrap;
        }

        button.wave-btn {
            background-color: #3a3a3a;
            color: var(--text-main);
            border: 2px solid transparent;
            padding: 8px 10px;
            border-radius: 5px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            flex: 1;
        }

        button.wave-btn:hover {
            background-color: #4a4a4a;
        }

        button.wave-btn.active {
            background-color: var(--accent);
            color: #111;
        }

        .explanation {
            background: rgba(255, 123, 0, 0.1);
            border-left: 3px solid var(--accent);
            padding: 8px 12px;
            font-size: 12px;
            line-height: 1.4;
            border-radius: 0 4px 4px 0;
            height: 60px;
            overflow-y: auto;
        }

        .slider-group {
            display: flex;
            flex-direction: column;
            gap: 4px;
            background: #222;
            padding: 10px 12px;
            border-radius: 6px;
            border: 1px solid #333;
        }

        #autoHarmonicsGroup, #manualHarmonicsGroup { height: 135px; }

        .slider-group.filter-group { border-color: var(--filter-color); background: rgba(231, 76, 60, 0.05); }
        .slider-group.env-group { border-color: var(--env-color); background: rgba(155, 89, 182, 0.05); }
        .slider-group.lfo-group { border-color: var(--lfo-color); background: rgba(241, 196, 15, 0.05); }
        .slider-group.delay-group { border-color: var(--delay-color); background: rgba(26, 188, 156, 0.05); }
        .slider-group.reverb-group { border-color: var(--reverb-color); background: rgba(142, 68, 173, 0.05); }
        .slider-group.mix-group { border-color: #555; background: #1f1f1f; }

        .slider-header {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            font-weight: bold;
            align-items: center;
        }

        .slider-header span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .slider-value { color: var(--accent); }
        .filter-group .lp-val { color: var(--filter-color); }
        .filter-group .hp-val { color: var(--hp-filter-color); }
        .env-group .slider-value { color: var(--env-color); }
        .lfo-group .slider-value { color: var(--lfo-color); }
        .delay-group .slider-value { color: var(--delay-color); }
        .reverb-group .slider-value { color: var(--reverb-color); }

        .info-btn {
            background: transparent;
            color: inherit;
            border: 1px solid currentColor;
            border-radius: 50%;
            width: 16px;
            height: 16px;
            font-size: 10px;
            font-weight: bold;
            display: inline-flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            padding: 0;
            opacity: 0.7;
            flex: none;
            transition: all 0.2s ease;
        }

        .info-btn:hover {
            opacity: 1;
            transform: scale(1.1);
        }

        .mystery-btn {
            background: rgba(255, 123, 0, 0.15);
            border: 1px solid var(--accent);
            color: var(--accent);
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: bold;
            width: 100%;
            margin-top: 8px;
            transition: all 0.2s ease;
            cursor: pointer;
            text-align: left;
        }

        .mystery-btn:hover {
            background: var(--accent);
            color: #111;
        }

        input[type=range] {
            -webkit-appearance: none;
            appearance: none;
            width: 100%;
            background: transparent;
            margin: 4px 0;
        }

        input[type=range]::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            height: 16px;
            width: 16px;
            border-radius: 50%;
            background: var(--accent);
            cursor: pointer;
            margin-top: -6px;
        }

        #cutoff::-webkit-slider-thumb { background: var(--filter-color); }
        #hpCutoff::-webkit-slider-thumb { background: var(--hp-filter-color); }
        .env-group input[type=range]::-webkit-slider-thumb { background: var(--env-color); }
        .lfo-group input[type=range]::-webkit-slider-thumb { background: var(--lfo-color); }
        .delay-group input[type=range]::-webkit-slider-thumb { background: var(--delay-color); }
        .reverb-group input[type=range]::-webkit-slider-thumb { background: var(--reverb-color); }
        #noiseMix::-webkit-slider-thumb { background: var(--noise-color); }
        #globalMasterVol::-webkit-slider-thumb { background: #2ecc71; }

        input[type=range]::-webkit-slider-runnable-track {
            width: 100%;
            height: 4px;
            cursor: pointer;
            background: #444;
            border-radius: 2px;
        }

        input[type=range]:focus {
            outline: none;
        }

        #adsrCanvas {
            width: 100%;
            height: 60px;
            background: #111;
            border-radius: 4px;
            border: 1px solid #333;
            margin-bottom: 5px;
        }

        .drawbars-container {
            display: flex;
            gap: 2px;
            height: 80px;
            align-items: flex-end;
            justify-content: space-between;
            margin-top: 5px;
        }

        .drawbar-wrapper {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            flex: 1;
        }

        .drawbar-wrapper input[type=range] {
            -webkit-appearance: slider-vertical;
            appearance: slider-vertical;
            width: 100%;
            height: 60px;
            cursor: pointer;
            margin: 0;
        }

        .drawbar-label {
            font-size: 9px;
            color: var(--text-muted);
            font-weight: bold;
        }

        .concept-box {
            background: #2a3b4c;
            border-left: 4px solid var(--sine-color);
            padding: 12px;
            border-radius: 0 6px 6px 0;
            font-size: 12.5px;
            line-height: 1.4;
            margin-top: auto;
        }

        .concept-box p { margin: 0 0 6px 0; }
        .concept-box p:last-child { margin: 0; }

        .piano-toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 15px;
            padding: 0 5px;
        }

        .piano-title {
            font-size: 12px;
            color: var(--accent);
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .midi-status-container {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 10px;
            color: #888;
            text-transform: none;
            font-weight: normal;
            margin-left: 10px;
        }

        .midi-light {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #444;
            transition: all 0.3s ease;
        }

        .midi-light.active {
            background-color: #2ecc71;
            box-shadow: 0 0 6px rgba(46, 204, 113, 0.6);
        }

        .piano-actions {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .octave-controls {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .octave-btn {
            background: #222;
            border: 1px solid #444;
            padding: 4px 10px;
            font-size: 11px;
            border-radius: 4px;
            color: var(--text-main);
            flex: none;
            min-width: auto;
            cursor: pointer;
        }

        .octave-btn:hover { background: #333; }
        .octave-btn:active { background: var(--accent); color: #111; border-color: var(--accent); }

        .piano-container {
            width: 100%;
            height: 120px;
            border: 2px solid #222;
            border-radius: 6px;
            overflow-x: auto;
            overflow-y: hidden;
            margin-top: 5px;
            background: #111;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
            -webkit-overflow-scrolling: touch;
            scroll-behavior: smooth;
        }

        .piano-scroll-wrapper {
            display: flex;
            width: 100%;
            min-width: 800px;
            height: 100%;
            position: relative;
        }

        .key-group { position: relative; flex: 1; }

        .white-key {
            width: 100%;
            height: 100%;
            background: #fdfdfd;
            border-right: 1px solid #ccc;
            border-bottom: 2px solid #ccc;
            display: flex;
            align-items: flex-end;
            justify-content: center;
            padding-bottom: 8px;
            color: #555;
            font-weight: bold;
            font-size: 11px;
            cursor: pointer;
            user-select: none;
            transition: background 0.05s;
        }

        .key-group:last-child .white-key { border-right: none; }

        .black-key {
            position: absolute;
            right: -30%;
            top: 0;
            width: 60%;
            height: 65%;
            background: #222;
            border: 1px solid #000;
            border-radius: 0 0 4px 4px;
            z-index: 2;
            display: flex;
            align-items: flex-end;
            justify-content: center;
            padding-bottom: 8px;
            color: #888;
            font-weight: bold;
            font-size: 10px;
            cursor: pointer;
            user-select: none;
            box-shadow: inset 0 -3px 5px rgba(255, 255, 255, 0.1);
            transition: background 0.05s;
        }

        .white-key.active { background: #e74c3c; color: white; }
        .black-key.active { background: #c0392b; color: white; }

        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            backdrop-filter: blur(4px);
            padding: 20px;
        }

        .modal-content {
            background: var(--panel-bg);
            max-width: 600px;
            width: 100%;
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            position: relative;
            max-height: 85vh;
            overflow-y: auto;
            line-height: 1.6;
        }

        .modal-close {
            position: absolute;
            top: 15px;
            right: 15px;
            background: transparent;
            color: var(--text-muted);
            border: none;
            font-size: 24px;
            cursor: pointer;
            padding: 0;
            line-height: 1;
            transition: color 0.2s;
        }

        .modal-close:hover { color: white; }

        .modal-title {
            color: var(--accent);
            margin-top: 0;
            font-size: 20px;
            margin-bottom: 15px;
            border-bottom: 1px solid #444;
            padding-bottom: 10px;
        }

        .modal-body h4 { color: #fff; margin-top: 20px; margin-bottom: 5px; }
        .modal-body ul { margin-top: 5px; padding-left: 20px; }
        
        .error-banner {
            background-color: rgba(231, 76, 60, 0.1);
            border: 1px solid #e74c3c;
            color: #e74c3c;
            padding: 10px;
            border-radius: 6px;
            font-size: 13px;
            margin-bottom: 15px;
            display: none;
            font-weight: 500;
        }

        @media (max-width: 900px) {
            .synth-dashboard { grid-template-columns: 1fr 1fr; }
            .synth-col:first-child { grid-column: span 2; flex-direction: row; flex-wrap: wrap; }
            .canvas-container { width: calc(50% - 5px); }
            .concept-box { width: 100%; }
        }

        @media (max-width: 600px) {
            .synth-dashboard { grid-template-columns: 1fr; }
            .synth-col:first-child { grid-column: span 1; flex-direction: column; }
            .canvas-container { width: 100%; }
            .piano-container { height: 90px; }
            .white-key { font-size: 9px; }
            .black-key { font-size: 8px; }
            .piano-actions { flex-direction: column; align-items: flex-end; gap: 5px; }
            .midi-status-container { display: none; }
            .preset-toolbar { flex-wrap: wrap; }
            .expert-toggle-btn { margin-left: 0; width: 100%; }
        }