:root{color-scheme:light;--color-bg:#f6f7f9;--color-surface:#fff;--color-surface-muted:#f3f4f6;--color-border:#e4e6ea;--color-text:#111318;--color-text-muted:#5b6472;--color-primary:#111318;--color-primary-weak:#3a3f48;--color-accent:#1f4cff;--radius-lg:16px;--radius-md:12px;--shadow-md:0 10px 30px rgba(16,24,40,.08);--shadow-sm:0 4px 12px rgba(16,24,40,.06)}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--color-text);background:var(--color-bg)}main{max-width:960px;margin:0 auto;padding:24px 16px 88px}@media (max-width:767px){main{padding:8px 12px 88px}.top-ad{margin-bottom:.5rem;margin-top:0}.ad-container{min-height:50px;margin:.5rem 0}.language-switcher-wrapper{margin-bottom:.25rem!important;margin-top:0}.card.hero{margin-bottom:.75rem;padding:16px}.card.hero h1{font-size:22px;margin-bottom:4px}.card.hero .lead{font-size:13px;margin-bottom:0}section{margin-bottom:12px}}.language-switcher{display:flex;gap:8px;justify-content:flex-end;align-items:center}.lang-btn{padding:8px 16px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface);color:var(--color-text);font-size:14px;cursor:pointer;transition:all .2s}.lang-btn:hover{background:var(--color-surface-muted)}.lang-btn.active{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}.ad-container{border-radius:var(--radius-md)}.ad-container,.ad-placeholder{min-height:90px;display:flex;align-items:center;justify-content:center;background:var(--color-surface-muted);margin:1rem 0}.ad-placeholder{border:2px dashed var(--color-border);border-radius:var(--radius-md);opacity:.6}.ad-placeholder-content{display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--color-text-muted);font-size:14px}.ad-placeholder-icon{font-size:24px;opacity:.5}.ad-placeholder-text{font-size:12px;text-align:center}@media (max-width:767px){.ad-placeholder{min-height:60px;margin:.5rem 0}.ad-placeholder-content{gap:4px}.ad-placeholder-icon{font-size:20px}.ad-placeholder-text{font-size:11px}}.top-ad{margin-bottom:2rem}@media (max-width:767px){.top-ad{margin-bottom:.5rem}.language-switcher-wrapper{margin-bottom:.25rem!important;margin-top:0}.card.hero{margin-bottom:.75rem;padding:16px}.card.hero h1{font-size:22px;margin-bottom:4px}.card.hero .lead{font-size:13px;margin-bottom:0}section{margin-bottom:12px}.ad-container{min-height:60px;margin:.5rem 0}}.bottom-ad{margin-top:3rem;margin-bottom:1rem}h1{font-size:28px;margin:0 0 8px}p{margin:0 0 16px;color:var(--color-text-muted)}section{margin-bottom:20px}label{display:block;font-weight:600;margin-bottom:6px}input[type=file],select,textarea{width:100%;padding:12px 14px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface)}textarea{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--color-text);resize:vertical}button{padding:12px 16px;border-radius:var(--radius-md);border:none;background:var(--color-primary);color:#fff;font-weight:600;cursor:pointer;min-height:44px}button+button{margin-left:2px}button.secondary{background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-primary)}button.active{background:var(--color-accent)}button:disabled{opacity:.5;cursor:not-allowed}.helper{font-size:13px;color:var(--color-text-muted)}.helper.error{color:#c23b32}.lead{font-size:15px;color:var(--color-text-muted)}.status{font-size:13px;color:var(--color-text);margin-top:8px}.status-card{display:flex;gap:12px;align-items:center;padding:12px 14px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);box-shadow:var(--shadow-sm)}.status-title{margin:0 0 4px;font-weight:600;color:var(--color-text)}.spinner{width:22px;height:22px;border-radius:999px;border:3px solid #e1e5ee;border-top:3px solid var(--color-accent);animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-md)}.card.subtle{background:var(--color-surface-muted);border:1px solid var(--color-border);box-shadow:var(--shadow-sm)}.hero{display:grid;grid-gap:12px;gap:12px}.section-header{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:16px}.actions{display:flex;gap:12px;flex-wrap:wrap}.output-controls{justify-content:space-between;align-items:center;margin-bottom:16px}.meta{gap:8px}.result-grid{display:grid;grid-template-columns:1fr;grid-gap:16px;gap:16px}.result-image{width:100%;border-radius:12px;border:1px solid #e5e5e5}.chord-list{display:grid;grid-gap:6px;gap:6px;font-size:14px}.badge{display:inline-flex;gap:6px;font-size:13px;background:var(--color-surface-muted);border-radius:999px;padding:6px 12px}.controls{display:grid;grid-gap:14px;gap:14px}.stack{display:grid;grid-gap:12px;gap:12px;margin-top:10px}.primary{background:var(--color-primary)}.segmented{display:inline-flex;gap:8px;background:var(--color-surface-muted);padding:6px;border-radius:999px}.segmented button{border-radius:999px;padding:8px 14px;background:transparent;color:var(--color-text)}.segmented button.active{background:var(--color-primary);color:#fff}.segmented button{border:1px solid transparent}.segmented button:not(.active):hover{border-color:var(--color-border);background:var(--color-surface)}.upload-card{position:relative;display:grid;grid-gap:10px;gap:10px;align-items:center;justify-items:center;padding:18px;border-radius:var(--radius-lg);border:1px dashed var(--color-border);background:var(--color-surface-muted);text-align:center;cursor:pointer}.upload-card input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}.upload-icon{width:40px;height:40px;border-radius:12px;background:var(--color-surface);display:grid;place-items:center;box-shadow:var(--shadow-sm);font-size:18px}.upload-title{margin:0 0 4px;font-weight:600;color:var(--color-text)}.upload-action{background:var(--color-primary);color:#fff;padding:8px 14px;border-radius:999px}.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.split-row{align-items:flex-end;gap:16px}.field{display:grid;grid-gap:6px;gap:6px}.split-row .field:first-child{flex:1 1;min-width:200px}.toggle{display:inline-flex;align-items:center;gap:10px}.toggle-input{position:absolute;opacity:0;pointer-events:none}.toggle-track{width:44px;height:26px;border-radius:999px;background:var(--color-border);display:inline-flex;align-items:center;padding:3px;transition:background .2s ease}.toggle-thumb{width:20px;height:20px;border-radius:999px;background:#fff;box-shadow:0 2px 6px rgba(16,24,40,.12);transition:transform .2s ease;transform:translateX(0)}.toggle-input:checked+.toggle-track{background:var(--color-accent)}.toggle-input:checked+.toggle-track .toggle-thumb{transform:translateX(18px)}.toggle-label{font-weight:600;color:var(--color-text)}.chord-table{width:100%;table-layout:fixed;border-collapse:collapse;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:15px}.chord-table td{border:1px solid #d9d9d9;padding:12px 8px;text-align:center;white-space:nowrap}.chord-row td{font-weight:600}.lyric-row td{font-weight:400;color:var(--color-text);white-space:normal}.print-area{margin-bottom:20px}.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}.table-scroll::-webkit-scrollbar{height:6px}.table-scroll::-webkit-scrollbar-thumb{background:#d0d0d0;border-radius:999px}.summary{font-weight:600;cursor:pointer}.collapsed-state{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:16px;color:var(--color-text-muted);background:var(--color-surface)}.empty-state{border:1px dashed var(--color-border);border-radius:var(--radius-md);padding:20px;color:var(--color-text-muted);background:var(--color-surface-muted)}@page{size:A4 portrait;margin:14mm}@media print{body{background:#fff}main{max-width:none;padding:0}section{border:none;box-shadow:none;padding:0}h1,h3,p{margin:0 0 10px}.print-hidden{display:none!important}.chord-table td{border:1px solid #000;padding:8px 6px}}.image-region-selector{position:relative;display:inline-block;border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;background:var(--color-surface)}.image-container{display:flex;justify-content:center;align-items:center;padding:16px;background:var(--color-surface-muted);border-radius:var(--radius-md)}.selection-layout{display:grid;grid-template-columns:1fr;grid-gap:20px;gap:20px}.selection-image-area,.selection-panel{display:grid;grid-gap:12px;gap:12px}.manual-layout{display:grid;grid-gap:20px;gap:20px}.manual-panel{display:grid;grid-gap:12px;gap:12px}.input-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.input-header h3{margin:0 0 4px}.count-badge{display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 16px;border-radius:var(--radius-md);background:var(--color-accent);color:#fff}.count-number{font-size:24px;font-weight:700;line-height:1}.count-label{font-size:11px;font-weight:600;opacity:.9}.quick-actions{display:flex;gap:8px;flex-wrap:wrap}.quick-button{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font-size:13px;font-weight:600;cursor:pointer;min-height:auto;transition:all .15s ease}.quick-button:hover:not(:disabled){background:var(--color-surface-muted);border-color:var(--color-primary)}.quick-button:disabled{opacity:.4;cursor:not-allowed}.quick-icon{font-size:16px;line-height:1}.input-guide{display:flex;gap:16px;flex-wrap:wrap;padding:12px 14px;border-radius:var(--radius-md);background:#f0f7ff;border:1px solid #d0e4ff}.guide-item{display:flex;align-items:center;gap:6px;font-size:13px;color:#1f4cff}.guide-icon{font-size:14px;font-weight:700}.guide-text{font-weight:600}code{background:var(--color-surface-muted);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:12px;color:var(--color-accent)}code,kbd{padding:2px 6px;border-radius:4px;font-weight:600}kbd{display:inline-block;border:1px solid var(--color-border);background:var(--color-surface);font-family:ui-monospace,SFMo-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:11px;box-shadow:0 1px 2px rgba(0,0,0,.08)}.manual-textarea{min-height:220px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:14px;line-height:1.6}.preview-card{padding:16px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface)}.preview-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px}.preview-title{margin:0 0 8px;font-size:16px;font-weight:600}.preview-stats{display:flex;gap:12px;flex-wrap:wrap}.stat-item{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--color-text-muted)}.stat-icon{font-size:14px}.manual-preview{margin:0;padding:12px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface-muted);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:13px;line-height:1.6;white-space:pre-wrap;color:var(--color-text)}.warning-card{padding:14px;border-radius:var(--radius-md);border:1px solid #ffd7a8;background:#fff9f0}.warning-header{display:flex;align-items:center;gap:8px;margin-bottom:10px}.warning-icon{font-size:18px}.warning-title{font-weight:600;font-size:14px;color:#8a4b1c}.empty-preview{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 20px;border-radius:var(--radius-md);border:1px dashed var(--color-border);background:var(--color-surface-muted)}.empty-icon{font-size:48px;margin-bottom:12px;opacity:.3}.empty-title{margin:0 0 4px;font-size:15px;font-weight:600;color:var(--color-text)}.empty-text{margin:0;font-size:13px;color:var(--color-text-muted)}.token-list{display:flex;flex-wrap:wrap;gap:8px}.token-bad{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:#fbecec;color:#b02a20;font-size:12px;font-weight:600}.convert-section{display:flex;flex-direction:column;align-items:center;gap:8px;padding-top:8px}.convert-button{width:100%;font-size:15px}.convert-hint{margin:0;font-size:12px;text-align:center}.preview-image{width:100%;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface)}.area-list{display:grid;grid-gap:12px;gap:12px}.area-list-empty{padding:20px;text-align:center;border:1px dashed var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-muted)}.area-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.area-list-header h4{margin:0;font-size:16px;font-weight:600}.area-list-items{display:grid;grid-gap:8px;gap:8px;max-height:420px;overflow-y:auto}.area-item{padding:12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.area-item-header{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px}.area-number{font-weight:600;font-size:14px;color:var(--color-text);margin-right:8px}.area-confidence{display:inline-flex;align-items:center;font-size:12px;padding:2px 8px;border-radius:999px;background:var(--color-surface-muted);color:var(--color-text-muted)}.area-chords{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:14px;font-weight:600;color:var(--color-text)}.area-chords-placeholder{font-size:13px;color:var(--color-text-muted);font-style:italic}.area-warning{margin-bottom:8px;padding:8px 10px;border-radius:10px;background:#fff6e6;color:#8a4b1c;font-size:12px;font-weight:600}.area-textarea{min-height:70px}.area-text{margin:10px 0 0;padding:12px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:13px;white-space:pre-wrap;color:var(--color-text)}.area-crop-wrap{margin-top:8px;display:grid;grid-gap:6px;gap:6px}.area-crop{width:100%;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface)}.region-list{display:grid;grid-gap:12px;gap:12px}.region-list-empty{padding:20px;text-align:center;border:1px dashed var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-muted)}.region-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.region-list-header h4{margin:0;font-size:16px;font-weight:600}.region-list-items{display:grid;grid-gap:8px;gap:8px;max-height:400px;overflow-y:auto}.region-item{padding:12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.region-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.region-number{font-weight:600;font-size:14px;color:var(--color-text)}.region-delete-btn{width:24px;height:24px;padding:0;border-radius:50%;background:var(--color-surface-muted);border:1px solid var(--color-border);color:var(--color-text);font-size:18px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}.region-delete-btn:hover{background:#fee;border-color:#c23b32;color:#c23b32}.region-item-content{margin-top:4px}.code-inputs{display:grid;grid-template-columns:repeat(auto-fill,minmax(64px,1fr));grid-gap:8px;gap:8px}.code-input{border:1px solid var(--color-border);border-radius:10px;padding:6px 8px;font-size:13px;min-height:32px;font-weight:600;color:var(--color-text);background:var(--color-surface);text-align:center}.code-input[readonly]{background:var(--color-surface-muted);color:var(--color-text-muted);cursor:default}.region-code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:14px;font-weight:600;color:var(--color-text)}.region-code-placeholder{font-size:13px;color:var(--color-text-muted);font-style:italic}.chord-cell{display:flex;flex-direction:column;align-items:center;gap:2px}.chord-converted{font-weight:600;font-size:15px;color:var(--color-text)}.chord-original{font-weight:400;font-size:12px;color:var(--color-text-muted)}button.small{padding:6px 12px;font-size:13px;min-height:auto}@media (min-width:768px){.result-grid{grid-template-columns:1.2fr .8fr}.selection-layout{grid-template-columns:1.5fr 1fr}.manual-layout{grid-template-columns:1.1fr .9fr}main{padding:36px 24px 96px}h1{font-size:30px}}