*{margin:0;padding:0;box-sizing:border-box}:root{--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-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, .5);--color-legend-item: #555;--color-checkbox-bg: #f5f5f5;--color-checkbox-bg-hover: #e8e8e8;--color-checkbox-text: #555;--color-checkbox-checked: #667eea;--color-select-all-border: #ddd;--color-select-all-bg: #f5f5f5;--color-select-all-bg-hover: #e8e8e8;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 1px 3px rgba(0, 0, 0, .08);--shadow-lg: 0 2px 10px rgba(0, 0, 0, .1);--shadow-xl: 0 4px 12px rgba(0, 0, 0, .1);--shadow-string: 0 1px 2px rgba(0, 0, 0, .2);--shadow-up-lg: 0 -2px 10px rgba(0, 0, 0, .1);--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--transition-fast: .15s ease}[data-theme=dark]{--color-primary: #8b9cf7;--color-primary-dark: #7b8de8;--color-bg: #1a1a2e;--color-surface: #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-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;--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 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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{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{color:var(--color-text);border-color:var(--color-border-strong)}.theme-toggle .icon-sun,.theme-toggle .icon-moon{display:none}[data-theme=dark] .theme-toggle .icon-sun,[data-theme=light] .theme-toggle 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var(--transition-fast)}.pwa-dismiss-btn:hover{color:var(--color-text)}@media(max-width:767px){body{padding:10px}.main-nav{padding:8px 0;margin-bottom:8px}.nav-group{display:none}.mobile-nav-bar{display:flex;align-items:center;justify-content:space-between;width:100%;padding:0 4px}.mobile-nav-logo{height:60px;width:auto}.hamburger-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:transparent;cursor:pointer;padding:8px}.hamburger-icon{display:block;width:22px;height:2px;background:var(--color-text);position:relative}.hamburger-icon:before,.hamburger-icon:after{content:"";position:absolute;left:0;width:22px;height:2px;background:var(--color-text)}.hamburger-icon:before{top:-7px}.hamburger-icon:after{top:7px}.sidebar-overlay{position:fixed;inset:0;background:#00000080;z-index:999;opacity:0;transition:opacity .3s 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8px;flex-wrap:wrap}.scale-strip-note{display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 14px;border-radius:var(--radius-md);border:2px solid transparent;background:transparent;transition:all .3s ease;min-width:48px}.scale-strip-note.fading{transition:all .3s ease}.scale-strip-note.root{border-color:#ffc10799;background:#ffc10714}.scale-strip-note.major-third{border-color:#ff704380;background:#ff70430f}.scale-strip-note.minor-third{border-color:#64b5f680;background:#64b5f60f}.scale-strip-note.fifth{border-color:#ab47bc80;background:#ab47bc0f}.scale-strip-note.active{border-color:#4caf50;background:#4caf501f;box-shadow:0 0 0 3px #4caf504d,0 0 12px #4caf5033;transform:scale(1.1)}.scale-strip-note.root.active{border-color:#ffc107;background:#ffc10726;box-shadow:0 0 0 3px #ffc1074d,0 0 12px #ffc10733}.scale-strip-note.major-third.active{border-color:#ff7043;background:#ff704326;box-shadow:0 0 0 3px #ff70434d,0 0 12px #ff704333}.scale-strip-note.minor-third.active{border-color:#64b5f6;background:#64b5f626;box-shadow:0 0 0 3px #64b5f64d,0 0 12px #64b5f633}.scale-strip-note.fifth.active{border-color:#ab47bc;background:#ab47bc26;box-shadow:0 0 0 3px #ab47bc4d,0 0 12px #ab47bc33}.strip-note-name{font-size:18px;font-weight:700;color:var(--color-text)}.strip-note-degree{font-size:11px;font-weight:600;color:var(--color-text-secondary)}.tuner-display{display:flex;flex-direction:column;align-items:center;padding:32px 0 8px}.tuner-meter{width:320px;max-width:90vw}.tuner-meter-svg{width:100%;height:auto;display:block}.tuner-meter-label{fill:var(--color-text-muted);font-size:12px;font-weight:600;text-anchor:middle}.tuner-needle{stroke:var(--color-text);stroke-width:2.5;stroke-linecap:round;transition:opacity .3s ease}.tuner-needle-pivot{fill:var(--color-text-secondary)}.tuner-note-display{display:flex;flex-direction:column;align-items:center;gap:4px;margin-top:16px}.tuner-note-name{font-size:64px;font-weight:800;color:var(--color-text);line-height:1}.tuner-cents{font-size:16px;font-weight:600;min-height:22px}.tuner-cents.in-tune{color:#4caf50}.tuner-cents.out-of-tune{color:#ff9800}.tuner-actions{display:flex;align-items:center;justify-content:center;gap:12px;padding:8px 0 24px}.tuner-strings{display:flex;justify-content:center;gap:8px;padding:8px 16px;flex-wrap:wrap}.tuner-string-btn{width:56px;height:56px;border:2px solid var(--color-border);border-radius:50%;background:var(--color-surface);color:var(--color-text);font-size:15px;font-weight:700;cursor:pointer;transition:all .15s ease;display:flex;align-items:center;justify-content:center}.tuner-string-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.tuner-string-btn.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff;box-shadow:0 0 0 3px #667eea4d}.reset-link{border:none;background:transparent;cursor:pointer;font-family:inherit;font-size:12px;font-weight:500;color:var(--color-text-muted);text-decoration:underline;text-underline-offset:2px;padding:4px 8px;border-radius:var(--radius-sm);transition:color var(--transition-fast)}.reset-link:hover{color:var(--color-primary)}.tuner-reset-row{display:flex;justify-content:center;margin-top:4px}.cof-wrapper{display:flex;flex-direction:column;align-items:center;gap:24px;max-width:560px;margin:0 auto}.cof-circle{width:100%;max-width:460px}.cof-svg{display:block;width:100%;height:auto}.cof-cell{cursor:pointer}.cof-segment{stroke:var(--color-border-strong);stroke-width:1;transition:fill var(--transition-fast)}.cof-major .cof-segment{fill:var(--color-muted)}.cof-minor .cof-segment{fill:var(--color-surface)}.cof-cell:hover .cof-segment{fill:var(--color-border)}.cof-cell.cof-selected .cof-segment{fill:var(--color-primary)}.cof-ring-line{fill:none;stroke:var(--color-text);stroke-width:2.5;pointer-events:none}.cof-label{fill:var(--color-text);font-family:inherit;font-weight:700;text-anchor:middle;dominant-baseline:central;pointer-events:none}.cof-major .cof-label{font-size:22px}.cof-minor .cof-label{font-size:16px}.cof-alt{font-size:11px;font-weight:600;fill:var(--color-text-secondary)}.cof-cell.cof-selected .cof-label{fill:var(--color-note-root-text)}.cof-center-label{fill:var(--color-primary);font-family:inherit;font-size:34px;font-weight:800;text-anchor:middle;dominant-baseline:central;pointer-events:none}.cof-panel{width:100%;display:flex;flex-direction:column;gap:14px;padding:20px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.cof-panel-head{display:flex;align-items:baseline;gap:10px}.cof-panel-title{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-muted)}.cof-panel-key{font-size:18px;font-weight:700;color:var(--color-primary);text-transform:capitalize}.cof-degrees-label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-muted)}.cof-degrees{display:flex;flex-wrap:wrap;gap:6px}.cof-degree-btn{min-width:46px;padding:8px 10px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-muted);color:var(--color-text-secondary);font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:color var(--transition-fast),background-color var(--transition-fast),border-color var(--transition-fast)}.cof-degree-btn:hover:not(.active){color:var(--color-text);border-color:var(--color-border-strong)}.cof-degree-btn.active{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-note-root-text);box-shadow:var(--shadow-md)}.cof-chords{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-top:4px}.cof-chord-card{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:64px;padding:12px 14px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-muted)}.cof-chord-roman{font-size:12px;font-weight:600;color:var(--color-text-muted)}.cof-quality-major .cof-chord-roman{color:var(--color-primary)}.cof-quality-diminished .cof-chord-roman{color:#e0726e}.cof-chord-name{font-size:22px;font-weight:700;color:var(--color-text)}.cof-chord-sep{font-size:18px;color:var(--color-text-muted)}.cof-empty{font-size:14px;color:var(--color-text-muted)}.cof-panel>.reset-link{align-self:flex-start}@media(max-width:767px){.cof-wrapper{gap:16px}.cof-panel{padding:16px}.cof-chord-card{min-width:54px;padding:10px}.cof-chord-name{font-size:18px}.cof-degree-btn{min-width:40px;padding:7px 8px;font-size:13px}}