:root{--font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, sans-serif;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, monospace;--transition-fast: .15s cubic-bezier(.16, 1, .3, 1);--transition-smooth: .28s cubic-bezier(.16, 1, .3, 1);--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-left: env(safe-area-inset-left, 0px);--safe-right: env(safe-area-inset-right, 0px);--min-tap: 48px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px}[data-theme=dark]{--bg-primary: #0a0b0e;--bg-secondary: #12141a;--bg-card: #181a22;--bg-elevated: #202430;--bg-glass: rgba(18, 20, 26, .85);--border-color: rgba(255, 255, 255, .08);--border-subtle: rgba(255, 255, 255, .04);--accent: #6366f1;--accent-hover: #4f46e5;--accent-glow: rgba(99, 102, 241, .22);--accent-subtle: rgba(99, 102, 241, .12);--text-main: #f8fafc;--text-muted: #94a3b8;--text-dim: #64748b;--svg-bg: #111318;--svg-string: #2b3040;--svg-bar: #474f66;--badge-bg: #1c1f2b;--badge-border: #6366f1;--badge-text: #ffffff;--shadow-elevation: 0 16px 36px rgba(0, 0, 0, .55)}[data-theme=medium]{--bg-primary: #12161f;--bg-secondary: #1a202c;--bg-card: #222938;--bg-elevated: #2c3548;--bg-glass: rgba(26, 32, 44, .88);--border-color: rgba(255, 255, 255, .1);--border-subtle: rgba(255, 255, 255, .05);--accent: #38bdf8;--accent-hover: #0284c7;--accent-glow: rgba(56, 189, 248, .22);--accent-subtle: rgba(56, 189, 248, .12);--text-main: #f1f5f9;--text-muted: #94a3b8;--text-dim: #64748b;--svg-bg: #161c28;--svg-string: #2f3a4e;--svg-bar: #4a5a78;--badge-bg: #232c3d;--badge-border: #38bdf8;--badge-text: #ffffff;--shadow-elevation: 0 16px 36px rgba(0, 0, 0, .4)}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-elevated: #f1f5f9;--bg-glass: rgba(255, 255, 255, .9);--border-color: rgba(0, 0, 0, .09);--border-subtle: rgba(0, 0, 0, .04);--accent: #4f46e5;--accent-hover: #4338ca;--accent-glow: rgba(79, 70, 229, .15);--accent-subtle: rgba(79, 70, 229, .08);--text-main: #0f172a;--text-muted: #475569;--text-dim: #94a3b8;--svg-bg: #ffffff;--svg-string: #cbd5e1;--svg-bar: #94a3b8;--badge-bg: #eef2ff;--badge-border: #6366f1;--badge-text: #1e1b4b;--shadow-elevation: 0 14px 32px rgba(15, 23, 42, .08)}[data-theme=wood]{--bg-primary: #171311;--bg-secondary: #211c19;--bg-card: #2a231f;--bg-elevated: #362d28;--bg-glass: rgba(33, 28, 25, .88);--border-color: rgba(217, 119, 6, .16);--border-subtle: rgba(255, 255, 255, .05);--accent: #f59e0b;--accent-hover: #d97706;--accent-glow: rgba(245, 158, 11, .25);--accent-subtle: rgba(245, 158, 11, .12);--text-main: #fef3c7;--text-muted: #d4bda8;--text-dim: #9c8573;--svg-bg: #1c1714;--svg-string: #44372f;--svg-bar: #6b5648;--badge-bg: #2d241e;--badge-border: #f59e0b;--badge-text: #fffbeb;--shadow-elevation: 0 16px 36px rgba(0, 0, 0, .55)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{height:100%;width:100%;overflow:hidden;overscroll-behavior-y:contain}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-main);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none;display:inline-flex;align-items:center;justify-content:center;touch-action:manipulation;user-select:none}.tap-target{min-height:var(--min-tap);min-width:var(--min-tap)}input[type=range]{cursor:pointer;accent-color:var(--accent)}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}header.top-bar{padding:0 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.btn-delete-song,.btn-delete-song:focus{opacity:1}.btn-delete-song:hover{color:#ef4444;background:#ef44441f}.sidebar-backdrop{display:none;position:fixed;inset:0;background:#0000008c;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);z-index:45;opacity:0;transition:opacity .28s ease}.sidebar-backdrop.active{display:block;opacity:1}@media (max-width: 768px){aside.sidebar{position:fixed;top:0;left:0;bottom:0;width:290px;max-width:85vw;box-shadow:0 0 40px #0009}.btn-delete-song{opacity:.8}}.tab-view-container{flex:1;width:100%;height:100%;overflow-y:auto;overflow-x:auto;padding:24px 20px 32px;display:flex;flex-direction:column;align-items:center;background:var(--bg-primary);min-height:0;-webkit-overflow-scrolling:touch}.capture-card{background:var(--svg-bg);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px 24px;box-shadow:0 4px 24px #0000002e;max-width:100%;overflow-x:auto;transition:var(--transition-fast)}.tab-score-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px;border-bottom:1px solid var(--border-color);padding-bottom:10px}.tab-score-title{font-size:1.25rem;font-weight:700;color:var(--text-main);letter-spacing:-.3px}.tab-score-meta{font-size:.75rem;color:var(--text-dim);font-family:var(--font-mono);letter-spacing:.5px}.svg-canvas-wrapper{display:flex;justify-content:center}#tabSvg{display:block}.tab-note-pill{cursor:pointer;transition:transform .28s cubic-bezier(.16,1,.3,1),opacity .2s ease;will-change:transform}.tab-note-pill:hover rect{filter:drop-shadow(0 0 4px var(--accent-glow));stroke:var(--accent);stroke-width:2px}.tab-note-pill rect{transition:fill .24s ease,stroke .24s ease}.tab-note-pill text{transition:fill .24s ease}@media (max-width: 768px){.tab-view-container{padding:14px 10px 20px}.capture-card{padding:14px;border-radius:var(--radius-md);width:100%}.tab-score-title{font-size:1.05rem}}.note-popover-overlay{position:fixed;inset:0;background:#00000073;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);z-index:1000;opacity:0;pointer-events:none;transition:opacity var(--transition-fast)}.note-popover-overlay.active{opacity:1;pointer-events:auto}.note-popover-card{position:fixed;width:280px;max-width:calc(100vw - 24px);box-sizing:border-box;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:0 10px 30px #00000073;padding:12px 14px;display:flex;flex-direction:column;gap:10px;z-index:1001;transform:scale(.96);transition:transform var(--transition-fast)}.note-popover-overlay.active 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solid var(--accent);background:var(--accent);color:#fff;font-size:.8rem;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:var(--transition-fast)}.note-popover-submit-btn:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.note-popover-help{font-size:.68rem;color:var(--text-dim)}.floating-bar{position:relative;width:100%;background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border-color);padding:10px 16px max(10px,var(--safe-bottom));display:flex;flex-direction:column;gap:8px;z-index:30;box-shadow:0 -8px 24px #00000040;flex-shrink:0}.floating-top-row{display:flex;flex-direction:column;gap:4px}.tab-input-wrapper{position:relative;display:flex;align-items:center;width:100%}.tab-input-box{width:100%;background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);padding:9px 86px 9px 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var(--border-color);border-radius:var(--radius-sm);padding:2px 4px;gap:6px;flex-shrink:0;height:30px;box-sizing:border-box}.stepper-item{display:flex;align-items:center;gap:2px}.stepper-val-badge{background:var(--accent-subtle);color:var(--accent);padding:1px 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var(--border-color);border-radius:8px;box-shadow:var(--shadow-elevation);font-size:.88rem;font-weight:500;opacity:0;transform:translateY(-8px);transition:opacity .2s ease,transform .2s ease}.toast.visible{opacity:1;transform:translateY(0)}.toast-info{border-left:4px solid var(--accent)}.toast-warning{border-left:4px solid #f59e0b}.toast-error{border-left:4px solid #ef4444}.toast-success{border-left:4px solid #10b981}.modal-backdrop{position:fixed;inset:0;background:#000000a6;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:10000;padding:16px;opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease}.modal-backdrop.open{opacity:1;visibility:visible}.modal-dialog{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;max-width:440px;width:100%;padding:24px;box-shadow:var(--shadow-elevation);transform:scale(.96);transition:transform .2s cubic-bezier(.16,1,.3,1)}.modal-backdrop.open .modal-dialog{transform:scale(1)}.modal-title{font-size:1.15rem;font-weight:700;margin-bottom:8px;color:var(--text-main)}.modal-desc{font-size:.9rem;color:var(--text-muted);margin-bottom:20px;line-height:1.5}.modal-actions{display:flex;justify-content:flex-end;gap:12px}.btn-secondary{padding:8px 16px;border-radius:8px;border:1px solid var(--border-color);color:var(--text-muted);font-weight:600;min-height:44px}.btn-primary{padding:8px 18px;border-radius:8px;background:var(--accent);color:#fff;font-weight:600;min-height:44px}.btn-danger{padding:8px 18px;border-radius:8px;background:#ef4444;color:#fff;font-weight:600;min-height:44px}.skeleton{background:linear-gradient(90deg,var(--bg-card) 25%,var(--bg-elevated) 50%,var(--bg-card) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:6px}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center;color:var(--text-muted)}.empty-state-icon{font-size:2.5rem;margin-bottom:12px}.empty-state-title{font-size:1.1rem;font-weight:600;color:var(--text-main);margin-bottom:6px}.empty-state-subtitle{font-size:.85rem;max-width:320px}.fretboard-drawer{background:var(--bg-card);border-bottom:1px solid var(--border-color);max-height:0;overflow:hidden;transition:max-height .32s cubic-bezier(.16,1,.3,1),padding .32s ease;padding:0 16px;flex-shrink:0;z-index:15}.fretboard-drawer.open{max-height:220px;padding:10px 16px 14px;overflow-x:auto;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.fretboard-header{display:flex;align-items:center;justify-content:space-between;margin:0 auto 8px;max-width:760px;width:100%}.fretboard-title{font-size:.8rem;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:8px;letter-spacing:-.2px}.fretboard-legend{display:flex;align-items:center;gap:12px;font-size:.72rem;color:var(--text-muted)}.legend-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.legend-dot.low{background:var(--accent-subtle);border:1px solid var(--accent)}.legend-dot.high{background:var(--accent);box-shadow:0 0 6px var(--accent-glow)}.btn-close-fretboard{background:transparent;border:none;color:var(--text-dim);padding:4px;border-radius:4px;cursor:pointer;display:flex;align-items:center}.btn-close-fretboard:hover{color:var(--text-main)}.fretboard-canvas-wrap{display:flex;justify-content:center;min-width:760px;width:100%}#fretboardSvg{display:block;margin:0 auto}@media (max-width: 768px){.fretboard-legend span{display:none}}.action-sheet-backdrop{position:fixed;inset:0;background:#0000008c;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:999;opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;display:flex;align-items:flex-end;justify-content:center}.action-sheet-backdrop.open{opacity:1;visibility:visible}.action-sheet-drawer{background:var(--bg-card);border:1px solid var(--border-color);border-bottom:none;border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;max-width:480px;padding:12px 18px max(20px,var(--safe-bottom));box-shadow:var(--shadow-elevation);transform:translateY(100%);transition:transform .28s cubic-bezier(.16,1,.3,1);display:flex;flex-direction:column;gap:14px}.action-sheet-backdrop.open .action-sheet-drawer{transform:translateY(0)}.sheet-handle{width:38px;height:4px;border-radius:2px;background:var(--border-color);margin:0 auto}.sheet-section-title{font-size:.72rem;font-weight:700;color:var(--text-dim);text-transform:uppercase;letter-spacing:.5px}.sheet-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.sheet-btn{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-main);padding:10px 8px;font-size:.8rem;font-weight:600;display:flex;flex-direction:column;align-items:center;gap:6px;transition:var(--transition-fast)}.sheet-btn:hover{border-color:var(--accent);background:var(--accent-subtle);color:var(--accent)}@media (max-width: 768px){header.top-bar{padding:0 12px;height:54px}.desktop-traffic-lights,.sidebar-btn-label,.theme-picker,.desktop-export{display:none!important}.mobile-only{display:inline-flex!important}.btn-sidebar-toggle{padding:0;width:38px;height:38px;justify-content:center}.title-input-wrapper{height:38px}.floating-bar{padding:8px 12px max(8px,var(--safe-bottom));gap:6px}.floating-bottom-row{flex-direction:row;flex-wrap:wrap;align-items:center;gap:6px}.position-segmented-bar{width:100%;flex:1 1 100%;display:flex;justify-content:space-between}.position-segmented-bar .pos-btn{flex:1;text-align:center;justify-content:center;padding:4px 6px;font-size:.72rem}.capo-segmented-bar{flex:1 1 auto;min-width:0;display:flex;align-items:center;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;height:38px;box-sizing:border-box}.capo-segmented-bar::-webkit-scrollbar{display:none}.stepper-segmented-bar{flex:1 1 auto;min-width:fit-content;display:flex;justify-content:space-between;height:38px;padding:3px 6px;box-sizing:border-box}.stepper-segmented-bar .stepper-item{flex:1;display:flex;align-items:center;justify-content:center;gap:4px}.stepper-segmented-bar .stepper-touch-btn{width:32px;height:28px;font-size:1.1rem;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:4px}.stepper-segmented-bar .stepper-val-badge{min-width:24px;font-size:.8rem;padding:2px 5px}}#app{display:flex;height:100vh;width:100vw;overflow:hidden;position:relative;background-color:var(--bg-primary)}.main-content{flex:1;display:flex;flex-direction:column;height:100%;position:relative;overflow:hidden;min-width:0}#tabViewMount{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}