*{margin:0;padding:0;box-sizing:border-box}:root{color-scheme:light dark;--color-primary: #667eea;--color-primary-dark: #5a6fd6;--color-bg: #f5f5f5;--color-surface: #ffffff;--color-muted: #f4f4f5;--color-border: #e4e4e7;--color-border-strong: #d4d4d8;--color-text: #18181b;--color-text-secondary: #71717a;--color-text-muted: #a1a1aa;--color-fretboard-bg: #ffffff;--color-fret-line: #ccc;--color-fret-line-nut: #333;--color-string-from: #999;--color-string-to: #777;--color-walk-line: #5f5f5f;--color-fret-dot: #ddd;--color-fret-number: #666;--color-fret-marker: #bbb;--color-caged-header-from: #f0f0f0;--color-caged-header-to: #e8e8e8;--color-shape-letter: #555;--color-shape-text: #777;--color-shape-pattern: #888;--color-note-bg: #ffffff;--color-note-border: #333;--color-note-text: #333;--color-note-root-bg: #333;--color-note-root-text: #ffffff;--color-interval-other-bg: rgba(255, 255, 255, .5);--color-interval-other-border: rgba(51, 51, 51, .5);--color-interval-other-text: rgba(51, 51, 51, 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#25253e;--color-muted: #2a2a45;--color-border: #3a3a55;--color-border-strong: #4a4a65;--color-text: #e8e8f0;--color-text-secondary: #a0a0b8;--color-text-muted: #707088;--color-fretboard-bg: #25253e;--color-fret-line: #4a4a65;--color-fret-line-nut: #c0c0d0;--color-string-from: #888898;--color-string-to: #6a6a7a;--color-walk-line: #a2a2c0;--color-fret-dot: #3a3a55;--color-fret-number: #9090a8;--color-fret-marker: #5a5a70;--color-caged-header-from: #2a2a45;--color-caged-header-to: #222238;--color-shape-letter: #c0c0d0;--color-shape-text: #9090a8;--color-shape-pattern: #8080a0;--color-note-bg: #2a2a45;--color-note-border: #c0c0d0;--color-note-text: #e0e0f0;--color-note-root-bg: #e0e0f0;--color-note-root-text: #1a1a2e;--color-interval-other-bg: rgba(42, 42, 69, .7);--color-interval-other-border: rgba(192, 192, 208, .7);--color-interval-other-text: rgba(210, 210, 225, .85);--color-legend-item: #c0c0d0;--color-checkbox-bg: #2a2a45;--color-checkbox-bg-hover: #35355a;--color-checkbox-text: #c0c0d0;--color-checkbox-checked: #8b9cf7;--color-select-all-border: #3a3a55;--color-select-all-bg: #2a2a45;--color-select-all-bg-hover: #35355a;--color-cof-sector: #2f2f4d;--color-cof-sector-hover: #3b3b60;--color-cof-divider: #4a4a65;--color-cof-ring: #ffffff;--color-cof-hub: #22223a;--color-cof-label: #e8e8f0;--color-cof-label-alt: #8a8aa0;--color-cof-selected-text: #1a1a2e;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .2);--shadow-md: 0 1px 3px rgba(0, 0, 0, .3);--shadow-lg: 0 2px 10px rgba(0, 0, 0, .3);--shadow-xl: 0 4px 12px rgba(0, 0, 0, .3);--shadow-string: 0 1px 2px rgba(0, 0, 0, .4);--shadow-up-lg: 0 -2px 10px rgba(0, 0, 0, .3)}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--color-bg);min-height:100vh;padding:20px;transition:background-color .3s ease,color .3s ease}.container{max-width:1600px;margin:0 auto}.main-nav{display:flex;justify-content:center;align-items:center;position:relative;padding:16px 0;margin-bottom:20px;background:transparent}.nav-group{position:relative}.nav-logo{display:block;position:absolute;right:100%;top:50%;transform:translateY(-50%);height:100px;width:auto;margin-right:12px}.nav-container{display:inline-flex;gap:4px;padding:4px;background:var(--color-muted);border:1px solid var(--color-border);border-radius:var(--radius-md)}.nav-link{text-decoration:none;color:var(--color-text-secondary);font-weight:500;font-size:14px;padding:8px 20px;border-radius:var(--radius-sm);transition:color var(--transition-fast),background-color var(--transition-fast),box-shadow var(--transition-fast)}.nav-link:hover:not(.active){color:var(--color-text)}.nav-link.active{background:var(--color-surface);color:var(--color-text);box-shadow:var(--shadow-md)}.controls-wrapper{margin-bottom:24px}.controls-accordion-toggle{display:none}.controls-row{display:contents}.controls{display:flex;justify-content:center;align-items:center;gap:32px;padding:16px 24px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.control-group{display:flex;align-items:center;gap:8px}.control-label{font-size:12px;color:var(--color-text-muted);font-weight:500;text-transform:uppercase;letter-spacing:.5px}.note-selector{display:inline-flex;align-items:center;gap:2px;padding:4px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-muted)}.note-btn{width:32px;padding:8px 0;border:none;background:transparent;cursor:pointer;font-size:12px;font-weight:500;color:var(--color-text-secondary);border-radius:var(--radius-sm);transition:color var(--transition-fast),background-color var(--transition-fast);display:flex;align-items:center;justify-content:center}.note-btn:hover{color:var(--color-text)}.note-btn:active{background:var(--color-border)}.note-display{padding:8px 16px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;letter-spacing:.5px;background:var(--color-surface);color:var(--color-primary);border-radius:var(--radius-sm);box-shadow:var(--shadow-md)}.toggle-group{display:inline-flex;gap:2px;padding:4px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-muted)}.toggle-btn,.highlight-toggle-btn{padding:8px 16px;border:none;background:transparent;cursor:pointer;font-size:13px;font-weight:500;color:var(--color-text-secondary);border-radius:var(--radius-sm);transition:color var(--transition-fast),background-color var(--transition-fast),box-shadow var(--transition-fast)}.toggle-btn.active,.highlight-toggle-btn.active{background:var(--color-surface);color:var(--color-primary);box-shadow:var(--shadow-md)}.toggle-btn:hover:not(.active),.highlight-toggle-btn:hover:not(.active){color:var(--color-text)}.caged-header{display:flex;justify-content:flex-start;padding:20px;background:linear-gradient(to bottom,var(--color-caged-header-from),var(--color-caged-header-to));border-radius:10px 10px 0 0;overflow-x:auto}.shape-label{display:flex;flex-direction:column;align-items:center;min-width:80px;cursor:pointer;transition:transform .15s ease-in-out;transform:translate(-50%)}.shape-label:hover{transform:translate(-50%) scale(1.05)}.shape-letter{font-size:48px;font-weight:700;color:var(--color-shape-letter)}.shape-text{font-size:14px;color:var(--color-shape-text);margin-top:-5px}.shape-line{height:3px;width:60px;margin-top:5px;border-radius:2px}.shape-pattern{font-size:12px;color:var(--color-shape-pattern);margin-top:3px}.triad-boards{display:grid;gap:24px}.triad-string-set-title{display:flex;align-items:baseline;gap:8px;margin:0 0 8px 12px;color:var(--color-text);font-size:16px;font-weight:600}.triad-string-set-title span{color:var(--color-text-muted);font-size:12px;font-weight:500}.triad-shape-label .shape-letter{font-size:36px}.triad-shape-path{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:5}.triad-shape-path polyline{fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;opacity:.5}.fretboard-container{background:var(--color-fretboard-bg);border-radius:0 0 10px 10px;padding:20px;overflow-x:auto;box-shadow:var(--shadow-lg)}.fretboard{position:relative;min-width:1400px;height:200px}.string-line{position:absolute;left:0;right:0;background:linear-gradient(to bottom,var(--color-string-from),var(--color-string-to));box-shadow:var(--shadow-string);opacity:.6;z-index:2}.fret-line{position:absolute;top:10px;bottom:10px;width:2px;background:var(--color-fret-line)}.fret-line.nut{width:4px;background:var(--color-fret-line-nut)}.fret-walk-path{position:absolute;top:0;left:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:5}.fret-walk-path 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span{font-size:14px;font-weight:500;color:var(--color-checkbox-text)}.checkbox-label input[type=checkbox]:checked+span{color:var(--color-checkbox-checked);font-weight:600}.position-hover-box{position:absolute;top:0;bottom:0;border:3px solid;border-radius:8px;pointer-events:none;z-index:5;opacity:.8}.fretboard-section{display:block}.theme-toggle,.sound-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);cursor:pointer;color:var(--color-text-secondary);transition:color var(--transition-fast),background-color var(--transition-fast),border-color var(--transition-fast);margin-left:8px;flex-shrink:0}.theme-toggle:hover,.sound-toggle:hover{color:var(--color-text);border-color:var(--color-border-strong)}.theme-toggle .icon-sun,.theme-toggle .icon-moon,.sound-toggle .sound-muted,.sound-toggle.sound-off .sound-wave{display:none}.sound-toggle.sound-off .sound-muted{display:block}.fretboard-sound-tap{position:absolute;width:34px;height:34px;border:3px solid var(--color-primary);border-radius:50%;pointer-events:none;z-index:16;transform:translate(-50%,-50%);animation:fretboard-sound-pulse .35s ease-out forwards}@keyframes fretboard-sound-pulse{0%{opacity:.9;transform:translate(-50%,-50%) scale(.65)}to{opacity:0;transform:translate(-50%,-50%) scale(1.25)}}[data-theme=dark] .theme-toggle .icon-sun,[data-theme=light] .theme-toggle .icon-moon{display:block}.mobile-nav-bar,.sidebar-overlay,.sidebar{display:none}.pwa-install-banner{position:fixed;bottom:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--color-surface);border-top:1px solid 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var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-muted);color:var(--color-text-secondary);font-family:inherit;font-weight:650;cursor:pointer}.beats-loop-btn:hover:not(:disabled){border-color:var(--color-primary);color:var(--color-primary)}.beats-loop-btn:disabled{cursor:default;opacity:.45}.beats-loop-delete:hover:not(:disabled){border-color:#e53935;color:#e53935}.beats-loop-status{grid-column:1 / -1;min-height:16px;color:var(--color-text-muted);font-size:12px}.beats-workspace{display:flex;flex-direction:column;gap:12px}.beats-grid-scroll{width:100%;overflow-x:auto;padding:8px 0 12px}.beats-grid{display:grid;grid-template-columns:minmax(76px,1fr) repeat(16,minmax(34px,1fr));align-items:center;gap:8px;min-width:820px;padding:18px;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-md)}.beats-corner,.beats-step-label{min-height:22px}.beats-step-label{color:var(--color-text-muted);font-size:12px;font-weight:700;text-align:center}.beats-step-label.current{color:var(--color-primary)}.beats-track-label{color:var(--color-text);font-size:14px;font-weight:650}.beats-cell{display:flex;align-items:center;justify-content:center;width:100%;aspect-ratio:1;min-height:34px;padding:0;border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-muted);cursor:pointer;transition:border-color 80ms ease,background-color 80ms ease,transform 80ms ease}.beats-cell span{width:10px;height:10px;border-radius:50%;background:var(--color-border-strong)}.beats-cell:hover{border-color:var(--color-primary)}.beats-cell.active{border-color:var(--color-primary);background:var(--color-primary)}.beats-cell.active span{background:var(--color-surface)}.beats-cell.current{transform:scale(1.08);box-shadow:0 0 0 2px #667eea59}.beats-beat-start{margin-left:4px}.beats-mixer{display:grid;grid-template-columns:repeat(4,minmax(130px,1fr));gap:12px;padding:12px 18px;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface)}.beats-mixer-control{display:flex;align-items:center;gap:10px;color:var(--color-text-secondary);font-size:12px;font-weight:650}.beats-level{flex:1;min-width:60px;accent-color:var(--color-primary);cursor:pointer}.beats-hint{color:var(--color-text-muted);font-size:12px;text-align:center}@media(max-width:767px){.beats-panel{padding-top:18px}.beats-workspace{gap:10px}.beats-loop-library{grid-template-columns:1fr;gap:10px;padding:12px}.beats-loop-actions{display:grid;grid-template-columns:repeat(3,1fr)}.beats-loop-btn{padding:0 8px}.beats-loop-field input,.beats-loop-field select{font-size:16px}.beats-loop-status{grid-column:1}.beats-grid-scroll{overflow-x:visible;padding:0}.beats-grid{grid-template-columns:34px repeat(4,minmax(44px,1fr));grid-template-rows:26px repeat(16,44px);gap:5px;min-width:0;padding:12px}.beats-corner{grid-column:1;grid-row:1}.beats-track-label{grid-column:var(--beats-column);grid-row:1;align-self:center;font-size:11px;text-align:center}.beats-step-label{grid-column:1;grid-row:var(--beats-row);align-self:center}.beats-cell{grid-column:var(--beats-column);grid-row:var(--beats-row);height:44px;min-height:44px;aspect-ratio:auto}.beats-beat-start{margin-left:0}.beats-cell.beats-beat-start{border-top-width:2px;border-top-color:var(--color-primary)}.beats-step-label.beats-beat-start{color:var(--color-text-secondary)}.beats-mixer{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px;padding:12px}.beats-mixer-control{flex-direction:column;align-items:stretch;gap:4px}}