.subtitle-tools-page{--subtitle-accent: #84cc16;--subtitle-accent-rgb: 132, 204, 22;width:100%;padding:0;color:var(--text-primary);box-sizing:border-box}.subtitle-tools-page .content-wrapper{box-sizing:border-box}.subtitle-tools-container{width:100%}.subtitle-tools-header{text-align:center;margin:var(--space-4) 0}.subtitle-tools-header h1{font-size:var(--text-2xl);font-weight:var(--font-bold);margin:0 0 var(--space-2);color:var(--text-primary);display:inline-flex;align-items:center;gap:var(--space-3)}.subtitle-tools-header h1 i{font-size:var(--text-3xl);color:var(--subtitle-accent)}.subtitle-tools-header p{font-size:var(--text-base);color:var(--text-secondary);margin:0}.subtitle-tools-features{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-2);margin:var(--space-4) 0}@media(max-width:992px){.subtitle-tools-features{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.subtitle-tools-features{grid-template-columns:1fr}}.feature-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2)}.feature-icon{flex-shrink:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(var(--subtitle-accent-rgb),.1);border-radius:var(--radius-lg);border:var(--border-width-thin) solid rgba(var(--subtitle-accent-rgb),.2)}.feature-icon i{font-size:var(--text-2xl);color:var(--subtitle-accent)}.feature-content strong{display:block;font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--text-primary);margin-bottom:var(--space-1);line-height:var(--leading-tight)}.feature-content p{font-size:var(--text-xs);color:var(--text-secondary);margin:0;line-height:var(--leading-snug)}.subtitle-tools-dropzone{background:var(--bg-surface);border:var(--border-width-base) dashed var(--border-default);border-radius:var(--radius-xl);margin:var(--space-4) 0;padding:var(--space-5);text-align:center;transition:all var(--transition-fast);cursor:pointer;box-shadow:var(--shadow-sm)}.subtitle-tools-dropzone:hover{border-color:var(--subtitle-accent);background:var(--bg-elevated);box-shadow:var(--shadow-md)}.subtitle-tools-dropzone.dragging{border-color:var(--subtitle-accent);background:rgba(var(--subtitle-accent-rgb),.1);border-style:solid}.dropzone-header{display:flex;align-items:center;justify-content:center;gap:var(--space-2);margin-bottom:var(--space-2)}.dropzone-header i{font-size:var(--text-lg);color:var(--subtitle-accent);line-height:var(--leading-none)}.dropzone-header h3{font-size:var(--text-lg);font-weight:var(--font-semibold);margin:0;color:var(--subtitle-accent);text-transform:uppercase;letter-spacing:var(--tracking-wide);line-height:var(--leading-loose)}.subtitle-tools-dropzone h2{font-size:var(--text-base);font-weight:var(--font-semibold);margin:0 0 var(--space-2);color:var(--text-primary)}.dropzone-formats{margin:0 0 var(--space-3);font-size:var(--text-sm);color:var(--text-secondary)}.dropzone-formats strong{color:var(--text-primary)}.dropzone-button{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-5);border-radius:var(--radius-lg);border:none;background:var(--subtitle-accent);color:var(--text-inverse);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;transition:all var(--transition-fast)}.dropzone-button:hover{filter:brightness(.9);box-shadow:0 8px 20px rgba(var(--subtitle-accent-rgb),.4)}.dropzone-button:active{transform:scale(.98)}.dropzone-input{display:none}.upload-error{display:flex;align-items:center;gap:var(--space-3);margin:var(--space-4) 0;padding:var(--space-4);border-radius:var(--radius-xl);background:var(--color-error-bg);border:var(--border-width-thin) solid var(--color-error)}.upload-error i{font-size:var(--text-xl);color:var(--color-error);flex-shrink:0}.upload-error p{margin:0;font-size:var(--text-sm);color:var(--color-error);line-height:var(--leading-normal)}.source-summary{margin:var(--space-4) 0;padding:var(--space-3) var(--space-4);border-radius:var(--radius-xl);background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.source-info{display:flex;flex-direction:column;gap:var(--space-1);flex:1}.source-name{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-primary)}.source-meta{font-size:var(--text-xs);color:var(--text-secondary);display:flex;align-items:center;gap:var(--space-1)}.source-dot{opacity:var(--opacity-muted)}.source-remove-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--color-error-bg);border:var(--border-width-thin) solid var(--color-error);border-radius:var(--radius-lg);color:var(--color-error);font-size:var(--text-lg);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.source-remove-btn:hover{background:#ef444433;border-color:var(--color-error);transform:scale(1.05)}.tools-tabs{margin:var(--space-4) 0 0;text-align:center}.tab-list{display:inline-flex;flex-wrap:wrap;gap:var(--space-1);padding:var(--space-1);border-radius:var(--radius-full);background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);justify-content:center}.tab-button{padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);border:none;background:transparent;color:var(--text-secondary);font-size:var(--text-base);font-weight:var(--font-semibold);cursor:pointer;transition:all var(--transition-fast)}.tab-button.active{background:var(--subtitle-accent);color:var(--text-inverse)}.tab-panel-wrapper{margin-top:var(--space-4)}.tool-panel{padding:0;border-radius:var(--radius-xl);background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);overflow:visible}.tool-panel.empty{text-align:center;padding:var(--space-8)}.tool-panel-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-3) var(--space-4);cursor:pointer;user-select:none;transition:background var(--transition-fast)}.tool-panel-header:hover{background:var(--interactive-hover)}.tool-panel-header h3{margin:0;flex:1}.tool-panel-header i{color:var(--text-muted);transition:transform var(--transition-fast);font-size:var(--text-sm)}.tool-panel-content{padding:0 var(--space-5) var(--space-4) var(--space-5)}.tool-panel.collapsed .tool-panel-content{display:none}.tool-info-message{display:flex;align-items:center;gap:var(--space-3);margin:0 0 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var(--border-default);font-size:var(--text-sm);color:var(--text-secondary);text-align:center}.timing-error{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-3);background:var(--color-error-bg);border:var(--border-width-thin) solid var(--color-error);border-radius:var(--radius-lg);color:var(--color-error);font-size:var(--text-sm);font-weight:var(--font-medium);margin-top:var(--space-4)}.timing-error span{flex:1}.timing-success{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-3);background:var(--color-success-bg);border:var(--border-width-thin) solid var(--color-success);border-radius:var(--radius-lg);color:var(--color-success);font-size:var(--text-sm);font-weight:var(--font-medium);margin-top:var(--space-4)}.timing-success span{flex:1}.timing-error .dismiss-btn,.timing-success .dismiss-btn{background:transparent;border:none;color:inherit;cursor:pointer;padding:var(--space-1);font-size:var(--text-base);opacity:var(--opacity-muted);transition:opacity var(--transition-fast);flex-shrink:0}.timing-error .dismiss-btn:hover,.timing-success .dismiss-btn:hover{opacity:1}.timing-mode-selector{margin:0 0 var(--space-4)}.timing-mode-selector>label{display:block;font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--text-primary);margin-bottom:var(--space-3)}.timing-mode-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-4)}.mode-button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2);background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-lg);color:var(--text-secondary);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;transition:all var(--transition-fast)}.mode-button i{font-size:var(--text-xl)}.mode-button:hover{background:var(--interactive-hover);border-color:rgba(var(--subtitle-accent-rgb),.4)}.mode-button.active{background:rgba(var(--subtitle-accent-rgb),.15);border-color:var(--subtitle-accent);color:var(--subtitle-accent)}.timing-controls-section{margin:0 0 var(--space-4);padding:var(--space-4);background:var(--bg-muted);border-radius:var(--radius-xl);border:var(--border-width-thin) solid var(--border-muted)}.timing-input-group{display:flex;flex-direction:column;gap:var(--space-2)}.timing-input-group.inline{flex-direction:row;align-items:center;gap:var(--space-4)}.timing-input-group label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-primary)}.timing-input-group input,.timing-input-group select{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-lg);padding:var(--space-2);color:var(--text-primary);font-size:var(--text-base);transition:all 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strong{color:var(--text-primary);font-size:var(--text-sm)}.remove-sync-btn{background:transparent;border:none;color:var(--color-error);cursor:pointer;padding:var(--space-1);font-size:var(--text-base);transition:all var(--transition-fast)}.remove-sync-btn:hover{color:var(--color-error);transform:scale(1.1)}.sync-point-times{display:flex;flex-direction:row;align-items:center;gap:var(--space-3);font-size:var(--text-xs);color:var(--text-secondary)}.add-sync-point{display:flex;flex-direction:column;gap:var(--space-3)}.add-sync-btn{display:flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3);background:rgba(var(--subtitle-accent-rgb),.15);border:var(--border-width-thin) dashed var(--subtitle-accent);border-radius:var(--radius-lg);color:var(--subtitle-accent);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;transition:all var(--transition-fast)}.add-sync-btn:hover{background:rgba(var(--subtitle-accent-rgb),.25);border-style:solid}.timing-preview-section{display:flex;gap:var(--space-3);margin:0 0 var(--space-4)}.preview-btn,.reset-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-4);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-lg);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;transition:all var(--transition-fast)}.preview-btn{background:#3b82f61a;color:var(--color-info)}.preview-btn:hover:not(:disabled){background:#3b82f633;border-color:var(--color-info)}.preview-btn:disabled{opacity:var(--opacity-disabled);cursor:not-allowed}.reset-btn{background:var(--bg-muted);color:var(--text-secondary)}.reset-btn:hover{background:var(--interactive-hover);border-color:var(--border-default);color:var(--text-primary)}.timing-preview-result{margin:var(--space-4);padding:var(--space-4);background:#3b82f60d;border:var(--border-width-thin) solid rgba(59,130,246,.2);border-radius:var(--radius-xl)}.preview-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-3);gap:var(--space-4)}.preview-label{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--color-info)}.preview-label i{font-size:var(--text-base)}.preview-navigation{display:flex;align-items:center;gap:var(--space-2)}.preview-nav-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:#3b82f61a;border:var(--border-width-thin) solid rgba(59,130,246,.3);border-radius:var(--radius-md);color:var(--color-info);cursor:pointer;transition:all var(--transition-fast);font-size:var(--text-sm)}.preview-nav-btn:hover:not(:disabled){background:#3b82f633;border-color:var(--color-info)}.preview-nav-btn:disabled{opacity:var(--opacity-disabled);cursor:not-allowed}.preview-counter{display:flex;align-items:center;gap:var(--space-1);font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--color-info)}.preview-input{width:50px;padding:var(--space-1) var(--space-2);background:#3b82f61a;border:var(--border-width-thin) solid 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.preview-tag{color:var(--color-warning)}.preview-item.after .preview-tag{color:var(--color-success)}.preview-item code{font-family:var(--font-mono);font-size:var(--text-sm);color:var(--text-primary);white-space:nowrap}.preview-arrow{color:var(--color-info);font-size:var(--text-xl);flex-shrink:0}.quality-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-4);margin:0 0 var(--space-4)}.quality-stat-card{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-4);background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-lg)}.quality-stat-card i{font-size:var(--text-2xl);color:var(--text-muted)}.quality-stat-card.error i{color:var(--color-error)}.quality-stat-card.warning i{color:var(--color-warning)}.quality-stat-card.success 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0}.quality-filters{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-4);margin-bottom:var(--space-4)}.quality-filter-group{display:flex;flex-direction:column;gap:var(--space-2)}.quality-filter-group label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-primary)}.quality-filter-group select{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-md);padding:var(--space-2) var(--space-3);color:var(--text-primary);font-size:var(--text-sm);cursor:pointer;color-scheme:dark}.quality-filter-group select option{background:var(--bg-elevated);color:var(--text-primary)}.quality-filter-group select:focus{outline:none;border-color:var(--subtitle-accent);box-shadow:0 0 0 3px rgba(var(--subtitle-accent-rgb),.1)}.quality-filter-result{font-size:var(--text-sm);color:var(--text-secondary);text-align:center;padding:var(--space-2);background:rgba(var(--subtitle-accent-rgb),.1);border-radius:var(--radius-md)}.quality-issue-preview{margin:0 0 var(--space-4);padding:var(--space-4);background:var(--bg-muted);border-radius:var(--radius-xl);border:var(--border-width-thin) solid var(--border-muted);min-width:0;overflow:visible}.quality-issue-details{display:flex;flex-direction:column;gap:var(--space-4)}.quality-issue-info{display:flex;flex-direction:column;gap:var(--space-2)}.quality-issue-message{padding:var(--space-3);padding-left:var(--space-4);background:var(--bg-surface);border-left:3px solid var(--color-error);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--text-primary)}.quality-issue-meta{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--text-secondary);padding-left:var(--space-4)}.quality-issue-text{padding:var(--space-3);background:var(--bg-muted);border-radius:var(--radius-md)}.quality-text-label{font-size:var(--text-xs);font-weight:var(--font-semibold);color:var(--text-secondary);text-transform:uppercase;margin-bottom:var(--space-2)}.quality-text-content{font-size:var(--text-sm);color:var(--text-primary);line-height:var(--leading-relaxed);white-space:pre-wrap}.quality-success-message{display:flex;flex-direction:column;align-items:center;gap:var(--space-3);padding:var(--space-8);margin:0 0 var(--space-4);background:var(--color-success-bg);border:var(--border-width-thin) solid var(--color-success);border-radius:var(--radius-xl);text-align:center}.quality-success-message 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span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.merge-file-details{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--text-secondary)}.merge-file-delay{display:flex;align-items:center;gap:var(--space-2);flex-shrink:0}.merge-file-delay label{font-size:var(--text-xs);color:var(--text-secondary);white-space:nowrap}.merge-delay-input{width:80px;padding:var(--space-2);background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-md);color:var(--text-primary);font-size:var(--text-sm);text-align:right}.merge-delay-input:focus{outline:none;border-color:var(--subtitle-accent);box-shadow:0 0 0 3px rgba(var(--subtitle-accent-rgb),.1)}.merge-delay-unit{font-size:var(--text-xs);color:var(--text-secondary)}.merge-file-actions{display:flex;gap:var(--space-2);flex-shrink:0}.merge-move-btn,.merge-remove-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast)}.merge-move-btn:hover:not(:disabled),.merge-remove-btn:hover{background:var(--interactive-hover);border-color:var(--subtitle-accent);color:var(--subtitle-accent)}.merge-remove-btn:hover{border-color:var(--color-error);color:var(--color-error)}.merge-move-btn:disabled{opacity:var(--opacity-disabled);cursor:not-allowed}.merge-output-section{margin:var(--space-6) 0;padding:var(--space-4);background:var(--bg-muted);border-radius:var(--radius-xl);border:var(--border-width-thin) solid var(--border-muted)}.merge-output-section h4{font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--text-primary);margin:0 0 var(--space-4) 0}.merge-format-options{display:flex;gap:var(--space-6)}.merge-format-options label{display:flex;align-items:center;gap:var(--space-2);cursor:pointer}.merge-format-options input[type=radio]{width:18px;height:18px;cursor:pointer}.merge-format-options label span{font-size:var(--text-sm);color:var(--text-primary);font-weight:var(--font-medium)}.merge-btn{background:var(--subtitle-accent)}.merge-btn:hover{filter:brightness(.9)}.merge-validation-error{display:flex;align-items:center;gap:var(--space-3);margin:var(--space-6) 0;padding:var(--space-4);background:var(--color-error-bg);border:var(--border-width-thin) solid var(--color-error);border-radius:var(--radius-xl)}.merge-validation-error i{font-size:var(--text-xl);color:var(--color-error);flex-shrink:0}.merge-validation-error span{font-size:var(--text-sm);color:var(--text-primary)}@media(max-width:768px){.merge-stats{grid-template-columns:repeat(2,1fr)}.merge-file-item{flex-direction:column;align-items:stretch}.merge-file-delay{justify-content:space-between}.merge-file-actions{justify-content:center}}.subtitle-info-section{margin:var(--space-8) 0}.subtitle-info-why{background:var(--bg-muted);border:var(--border-width-thin) solid var(--border-muted);border-radius:var(--radius-xl);padding:var(--space-8);margin-bottom:var(--space-4)}.subtitle-info-why h3{font-size:var(--text-xl);font-weight:var(--font-semibold);color:var(--text-primary);margin:0 0 var(--space-6) 0;display:flex;align-items:center;gap:var(--space-3)}.subtitle-info-why h3 i{color:var(--subtitle-accent);font-size:var(--text-lg)}.subtitle-info-why-content{display:grid;gap:var(--space-6)}.subtitle-info-why-item{display:flex;gap:var(--space-4);align-items:flex-start}.subtitle-info-why-icon{flex-shrink:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(var(--subtitle-accent-rgb),.1);border-radius:var(--radius-lg);border:var(--border-width-thin) solid rgba(var(--subtitle-accent-rgb),.2);color:var(--subtitle-accent);font-size:var(--text-lg)}.subtitle-info-why-item strong{display:block;font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--text-primary);margin-bottom:var(--space-1)}.subtitle-info-why-item p{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--text-secondary);margin:0}.subtitle-info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-4)}.subtitle-info-card{background:rgba(var(--subtitle-accent-rgb),.05);border:var(--border-width-thin) solid rgba(var(--subtitle-accent-rgb),.2);border-radius:var(--radius-2xl);padding:var(--space-8);text-align:center;transition:all var(--transition-base)}.subtitle-info-card:hover{background:rgba(var(--subtitle-accent-rgb),.08);border-color:rgba(var(--subtitle-accent-rgb),.3);transform:translateY(-4px)}.subtitle-info-icon{width:60px;height:60px;margin:0 auto var(--space-4);display:flex;align-items:center;justify-content:center;background:rgba(var(--subtitle-accent-rgb),.15);border-radius:var(--radius-full);color:var(--subtitle-accent);font-size:var(--text-2xl)}.subtitle-info-card h3{font-size:var(--text-lg);font-weight:var(--font-semibold);color:var(--text-primary);margin:0 0 var(--space-3) 0}.subtitle-info-card p{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--text-secondary);margin:0}[dir=rtl] .subtitle-info-why-item strong{text-align:right}[dir=rtl] .subtitle-info-card h3,[dir=rtl] .subtitle-info-card p{text-align:center}[data-theme=light] .subtitle-tools-page,[data-theme=light] .subtitle-tools-header h1{color:var(--text-primary)}[data-theme=light] .subtitle-tools-header p{color:var(--text-secondary)}[data-theme=light] .subtitle-tools-dropzone{background:#fff;border:2px dashed rgba(0,0,0,.2)}[data-theme=light] .subtitle-tools-dropzone h2{color:var(--text-primary)}[data-theme=light] .subtitle-tools-dropzone:hover{border-color:var(--subtitle-accent);background-color:var(--bg-surface)}[data-theme=light] .subtitle-tools-dropzone.dragging{border-color:var(--subtitle-accent);background-color:rgba(var(--brand-color-rgb),.05)}[data-theme=light] .dropzone-header i{color:var(--brand-color)}[data-theme=light] .dropzone-title{color:var(--text-primary)}[data-theme=light] .dropzone-subtitle{color:var(--text-secondary)}[data-theme=light] .dropzone-formats,[data-theme=light] .dropzone-formats strong,[data-theme=light] .subtitle-tools-dropzone .dropzone-title{color:var(--text-primary)}[data-theme=light] .subtitle-tools-dropzone .dropzone-subtitle{color:var(--text-secondary)}[data-theme=light] .subtitle-tools-features p{color:var(--text-primary)}[data-theme=light] .feature-icon{background:rgba(var(--brand-color-rgb),.12);border:var(--border-width-thin) solid rgba(var(--brand-color-rgb),.25)}[data-theme=light] .feature-icon i{color:var(--subtitle-accent)}[data-theme=light] .feature-content strong{color:var(--text-primary)}[data-theme=light] .feature-content span{color:var(--text-secondary)}[data-theme=light] .source-summary{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] .source-name{color:var(--text-primary)}[data-theme=light] .source-meta{color:var(--text-secondary)}[data-theme=light] .source-remove-btn{background:rgba(var(--color-error-rgb),.08);border:var(--border-width-thin) solid rgba(var(--color-error-rgb),.2)}[data-theme=light] .source-remove-btn:hover{background:rgba(var(--color-error-rgb),.15);border-color:var(--color-error)}[data-theme=light] .subtitle-source-card{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);box-shadow:var(--shadow-sm)}[data-theme=light] .source-file-info,[data-theme=light] .source-file-name{color:var(--text-primary)}[data-theme=light] .source-file-meta{color:var(--text-secondary)}[data-theme=light] .source-remove-btn{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--color-error)}[data-theme=light] .source-remove-btn:hover{background:var(--color-error-bg);border-color:var(--color-error)}[data-theme=light] .subtitle-tools-tabs{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);box-shadow:var(--shadow-sm)}[data-theme=light] .tab-list{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] .tab-button{color:var(--text-secondary)}[data-theme=light] .tab-button:hover{color:var(--text-primary)}[data-theme=light] .tab-button.active{background:var(--brand-color);color:var(--text-inverse)}[data-theme=light] .tool-panel{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] .tool-panel h3,[data-theme=light] .tool-panel h4{color:var(--text-primary)}[data-theme=light] .tool-panel-header{background:transparent}[data-theme=light] .tool-panel-header:hover{background:var(--interactive-hover)}[data-theme=light] .tool-panel-header h3{color:var(--text-primary)}[data-theme=light] .tool-panel-header i,[data-theme=light] .panel-description{color:var(--text-secondary)}[data-theme=light] .tool-info-message{background:#3b82f614;border:var(--border-width-thin) solid rgba(59,130,246,.2);color:var(--text-primary)}[data-theme=light] .tool-info-message i{color:var(--color-info)}[data-theme=light] .timing-mode-selection{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .mode-button{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .mode-button:hover{background:var(--bg-muted);border-color:var(--brand-color)}[data-theme=light] .mode-button.active{background:var(--brand-color);border-color:var(--brand-color);color:var(--text-inverse)}[data-theme=light] .timing-input-group input,[data-theme=light] .timing-input-group select,[data-theme=light] input[type=text],[data-theme=light] input[type=number],[data-theme=light] select{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .timing-input-group input:focus,[data-theme=light] input[type=text]:focus,[data-theme=light] input[type=number]:focus,[data-theme=light] select:focus{border-color:var(--brand-color);background:var(--bg-surface);box-shadow:0 0 0 3px rgba(var(--brand-color-rgb),.1)}[data-theme=light] .timing-input-group label,[data-theme=light] label{color:var(--text-primary)}[data-theme=light] .input-hint{color:var(--text-secondary)}[data-theme=light] .checkbox-label{color:var(--text-primary)}[data-theme=light] input[type=checkbox]{border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] input[type=checkbox]:checked{background:var(--brand-color);border-color:var(--brand-color)}[data-theme=light] .apply-btn:disabled,[data-theme=light] .download-btn:disabled{opacity:var(--opacity-disabled)}[data-theme=light] .add-sync-btn{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .add-sync-btn:hover{background:var(--bg-muted);border-color:var(--brand-color)}[data-theme=light] .reset-btn{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-secondary)}[data-theme=light] .reset-btn:hover{background:var(--bg-muted);border-color:var(--color-error);color:var(--color-error)}[data-theme=light] .sync-point-item{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .sync-point-item:hover{background:var(--bg-muted)}[data-theme=light] .sync-point-header strong{color:var(--text-primary)}[data-theme=light] .remove-sync-btn{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--color-error)}[data-theme=light] .remove-sync-btn:hover{background:var(--color-error-bg);border-color:var(--color-error)}[data-theme=light] .preview-item code{color:var(--text-primary)}[data-theme=light] .timing-preview-section,[data-theme=light] .cleanup-preview-section{background:var(--bg-surface)}[data-theme=light] .preview-label{color:var(--text-primary)}[data-theme=light] .preview-controls{background:var(--bg-muted);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .preview-nav-btn{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .preview-nav-btn:hover:not(:disabled){background:var(--bg-muted);border-color:var(--brand-color)}[data-theme=light] .preview-nav-btn:disabled{background:var(--bg-muted);color:var(--text-muted)}[data-theme=light] .preview-counter input{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .preview-total{color:var(--text-secondary)}[data-theme=light] .preview-item{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .preview-timing,[data-theme=light] .preview-index{color:var(--text-secondary)}[data-theme=light] .preview-text,[data-theme=light] .preview-content{color:var(--text-primary)!important}[data-theme=light] .cleanup-options-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .cleanup-options-section h4{color:var(--text-primary)}[data-theme=light] .cleanup-section{background:var(--bg-muted);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .cleanup-section h4{color:var(--text-primary)}[data-theme=light] .quality-stats-grid{background:var(--bg-surface)}[data-theme=light] .quality-stat-card{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted);box-shadow:var(--shadow-sm)}[data-theme=light] .quality-stat-card.error{background:rgba(var(--color-error-rgb),.05);border-color:rgba(var(--color-error-rgb),.2)}[data-theme=light] .quality-stat-card.warning{background:rgba(var(--color-warning-rgb),.05);border-color:rgba(var(--color-warning-rgb),.2)}[data-theme=light] .quality-stat-card.info{background:#3b82f60d;border-color:#3b82f633}[data-theme=light] .quality-stat-card.success{background:rgba(var(--color-success-rgb),.05);border-color:rgba(var(--color-success-rgb),.2)}[data-theme=light] .quality-stat-value{color:var(--text-primary)}[data-theme=light] .quality-stat-label{color:var(--text-secondary)}[data-theme=light] .quality-settings-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .quality-setting-item label{color:var(--text-primary)}[data-theme=light] .quality-filters-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .quality-filter-group label{color:var(--text-primary)}[data-theme=light] .quality-filter-group select{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary);color-scheme:light}[data-theme=light] .quality-filter-group select option{background:var(--bg-surface);color:var(--text-primary)}[data-theme=light] .quality-issues-count{background:var(--bg-muted);color:var(--text-primary);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .quality-autofix-section{background:rgba(var(--brand-color-rgb),.08);border:var(--border-width-thin) solid rgba(var(--brand-color-rgb),.3)}[data-theme=light] .quality-autofix-info i{color:var(--brand-color)}[data-theme=light] .quality-autofix-info span{color:var(--text-primary)}[data-theme=light] .quality-issue-preview{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .quality-issue-message{background:var(--bg-muted);color:var(--text-primary)}[data-theme=light] .quality-issue-meta span,[data-theme=light] .quality-text-label{color:var(--text-secondary)}[data-theme=light] .quality-text-content,[data-theme=light] .quality-issue-text{background:var(--bg-muted);border:var(--border-width-thin) solid var(--border-muted);color:var(--text-primary)}[data-theme=light] .quality-filter-result{color:var(--text-secondary)}[data-theme=light] .fix-issue-btn{background:var(--brand-color);color:var(--text-inverse)}[data-theme=light] .fix-issue-btn:hover:not(:disabled){filter:brightness(.9)}[data-theme=light] .manual-edit-section{background:var(--bg-surface);border-top:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .manual-edit-textarea{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .manual-edit-textarea:focus{border-color:var(--brand-color);box-shadow:0 0 0 3px rgba(var(--brand-color-rgb),.1)}[data-theme=light] .timing-edit-input{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .timing-edit-input:focus{border-color:var(--brand-color);box-shadow:0 0 0 3px rgba(var(--brand-color-rgb),.1)}[data-theme=light] .timing-edit-group label{color:var(--text-secondary)}[data-theme=light] .encoding-info-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .encoding-info-item{background:var(--bg-muted)}[data-theme=light] .encoding-info-label{color:var(--text-secondary)}[data-theme=light] .encoding-info-value{color:var(--text-primary)}[data-theme=light] .encoding-warning{background:rgba(var(--color-warning-rgb),.08);border:var(--border-width-thin) solid rgba(var(--color-warning-rgb),.2)}[data-theme=light] .encoding-warning i{color:var(--color-warning)}[data-theme=light] .encoding-warning span{color:var(--text-primary)}[data-theme=light] .encoding-settings-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .encoding-display{background:var(--bg-muted);border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] .encoding-display strong{color:var(--text-primary)}[data-theme=light] .encoding-desc{color:var(--text-secondary)}[data-theme=light] .encoding-select{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary);color-scheme:light}[data-theme=light] .encoding-select option{background:var(--bg-surface);color:var(--text-primary)}[data-theme=light] .encoding-select:focus{border-color:var(--brand-color);box-shadow:0 0 0 3px rgba(var(--brand-color-rgb),.1)}[data-theme=light] .encoding-arrow i{color:var(--brand-color)}[data-theme=light] .line-ending-options label{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] .line-ending-options label:hover{background:var(--bg-muted);border-color:var(--border-default)}[data-theme=light] .line-ending-options label>span:first-of-type{color:var(--text-primary)}[data-theme=light] .line-ending-desc{color:var(--text-secondary)}[data-theme=light] .encoding-info-message{background:#3b82f614;border:var(--border-width-thin) solid rgba(59,130,246,.2)}[data-theme=light] .encoding-info-message i{color:var(--color-info)}[data-theme=light] .encoding-info-message span{color:var(--text-primary)}[data-theme=light] .merge-upload-section{background:transparent}[data-theme=light] .merge-upload-hint{color:var(--text-secondary)}[data-theme=light] .merge-stats{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .merge-stat-label{color:var(--text-secondary)}[data-theme=light] .merge-stat-value,[data-theme=light] .merge-files-section h4{color:var(--text-primary)}[data-theme=light] .merge-file-item{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default)}[data-theme=light] .merge-file-item:hover{background:var(--bg-muted);border-color:var(--border-default)}[data-theme=light] .merge-file-name{color:var(--text-primary)}[data-theme=light] .merge-file-details,[data-theme=light] .merge-file-delay label{color:var(--text-secondary)}[data-theme=light] .merge-delay-input{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-primary)}[data-theme=light] .merge-delay-input:focus{border-color:var(--brand-color);box-shadow:0 0 0 3px rgba(var(--brand-color-rgb),.1)}[data-theme=light] .merge-delay-unit{color:var(--text-secondary)}[data-theme=light] .merge-move-btn,[data-theme=light] .merge-remove-btn{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);color:var(--text-secondary)}[data-theme=light] .merge-move-btn:hover:not(:disabled){background:var(--bg-muted)}[data-theme=light] .merge-remove-btn:hover{background:var(--color-error-bg);border-color:var(--color-error);color:var(--color-error)}[data-theme=light] .merge-move-btn:disabled{background:var(--bg-muted);color:var(--text-muted)}[data-theme=light] .merge-output-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .merge-output-section h4,[data-theme=light] .merge-format-options label,[data-theme=light] .merge-format-options label span{color:var(--text-primary)}[data-theme=light] .merge-validation-error{background:rgba(var(--color-error-rgb),.08);border:var(--border-width-thin) solid rgba(var(--color-error-rgb),.2)}[data-theme=light] .merge-validation-error i{color:var(--color-error)}[data-theme=light] .merge-validation-error span{color:var(--text-primary)}[data-theme=light] .timing-error{background:rgba(var(--color-error-rgb),.08);border:var(--border-width-thin) solid rgba(var(--color-error-rgb),.2);color:var(--text-primary)}[data-theme=light] .timing-error span{color:var(--color-error)}[data-theme=light] .timing-success{background:rgba(var(--color-success-rgb),.08);border:var(--border-width-thin) solid rgba(var(--color-success-rgb),.2);color:var(--text-primary)}[data-theme=light] .timing-success span{color:var(--color-success)}[data-theme=light] .dismiss-btn{background:transparent;color:var(--text-secondary)}[data-theme=light] .dismiss-btn:hover{color:var(--text-primary)}[data-theme=light] .subtitle-tools-page ::-webkit-scrollbar-track{background:var(--bg-muted)}[data-theme=light] .subtitle-tools-page ::-webkit-scrollbar-thumb{background:var(--text-muted);border:2px solid var(--bg-muted)}[data-theme=light] .subtitle-tools-page ::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}[data-theme=light] .quality-info-message{background:#3b82f614;border:var(--border-width-thin) solid rgba(59,130,246,.2)}[data-theme=light] .quality-info-message i{color:var(--color-info)}[data-theme=light] .quality-info-message p{color:var(--text-primary)}[data-theme=light] .quality-success-message{background:rgba(var(--color-success-rgb),.08);border:var(--border-width-thin) solid rgba(var(--color-success-rgb),.2)}[data-theme=light] .quality-success-message i,[data-theme=light] .quality-success-message h4{color:var(--color-success)}[data-theme=light] .quality-success-message p{color:var(--text-primary)}[data-theme=light] .advanced-options-section{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-muted)}[data-theme=light] .advanced-options-section h4{color:var(--text-primary)}[data-theme=light] .options-hint{color:var(--text-secondary)}[data-theme=light] .subtitle-info-why{background:var(--bg-surface);border-color:var(--border-default)}[data-theme=light] .subtitle-info-why h3{color:var(--text-primary)}[data-theme=light] .subtitle-info-why-icon{background:rgba(var(--brand-color-rgb),.08);border-color:rgba(var(--brand-color-rgb),.15)}[data-theme=light] .subtitle-info-why-item strong{color:var(--text-primary)}[data-theme=light] .subtitle-info-why-item p{color:var(--text-secondary)}[data-theme=light] .subtitle-info-card{background:rgba(var(--brand-color-rgb),.05);border-color:rgba(var(--brand-color-rgb),.25)}[data-theme=light] .subtitle-info-card:hover{background:rgba(var(--brand-color-rgb),.25);border-color:var(--brand-color)}[data-theme=light] .subtitle-info-icon{background:rgba(var(--brand-color-rgb),.25);color:var(--brand-color)}[data-theme=light] .subtitle-info-card h3{color:var(--text-primary)}[data-theme=light] .subtitle-info-card p{color:var(--text-secondary)}[data-theme=light] .subtitle-editor-container{background:var(--bg-surface);border:var(--border-width-thin) solid var(--border-default);box-shadow:var(--shadow-md)}[data-theme=light] .subtitle-editor-container:before{background:var(--border-default)}[data-theme=light] .subtitle-editor-header{border-bottom-color:var(--border-default)}[data-theme=light] .subtitle-editor-header h3{color:var(--text-primary)}[data-theme=light] .subtitle-editor-header h3:before{background:linear-gradient(180deg,var(--brand-color),var(--brand-color))}[data-theme=light] .subtitle-editor-header p{color:var(--text-secondary)}[data-theme=light] .filter-toggle label{background:var(--bg-muted);border-color:var(--border-default);color:var(--text-primary)}[data-theme=light] .filter-toggle label:hover{background:var(--bg-muted);border-color:rgba(var(--brand-color-rgb),.3)}[data-theme=light] .nav-btn{background:var(--bg-muted);border-color:var(--border-default);color:var(--text-secondary)}[data-theme=light] .nav-btn:hover{background:rgba(var(--brand-color-rgb),.1);color:var(--brand-color);border-color:rgba(var(--brand-color-rgb),.3)}[data-theme=light] .subtitle-editor-table-header{background:var(--bg-muted);backdrop-filter:none;border-color:transparent;border-bottom-color:var(--border-default);color:var(--text-secondary);padding-right:12px;box-sizing:border-box}[data-theme=light] .subtitle-editor-table-header>div{border-right-color:transparent;justify-content:center}[data-theme=light] .subtitle-editor-table-header .col-status{font-size:var(--text-xs)}[data-theme=light] .subtitle-editor-viewport{background:var(--bg-surface);border-color:var(--border-default)}[data-theme=light] .subtitle-editor-viewport::-webkit-scrollbar{width:12px}[data-theme=light] .subtitle-editor-viewport::-webkit-scrollbar-track{background:var(--bg-muted);border-radius:0 0 var(--radius-lg) 0}[data-theme=light] .subtitle-editor-viewport::-webkit-scrollbar-thumb{background:rgba(var(--brand-color-rgb),.3);border-radius:var(--radius-md);border:2px solid var(--bg-muted)}[data-theme=light] .subtitle-editor-viewport::-webkit-scrollbar-thumb:hover{background:rgba(var(--brand-color-rgb),.5)}[data-theme=light] .subtitle-editor-viewport::-webkit-scrollbar-thumb:active{background:rgba(var(--brand-color-rgb),.7)}[data-theme=light] .subtitle-editor-viewport{scrollbar-width:thin;scrollbar-color:rgba(var(--brand-color-rgb),.3) var(--bg-muted)}[data-theme=light] .subtitle-editor-row{border-bottom-color:var(--border-default)}[data-theme=light] .subtitle-editor-row>div{border-right-color:transparent;padding:0}[data-theme=light] .row-even{background-color:var(--bg-muted)}[data-theme=light] .row-odd{background-color:var(--bg-surface)}[data-theme=light] .subtitle-editor-row:hover{background-color:rgba(var(--brand-color-rgb),.05)!important;border-bottom-color:rgba(var(--brand-color-rgb),.15)}[data-theme=light] .subtitle-editor-row:hover>div{border-right-color:rgba(var(--brand-color-rgb),.1)}[data-theme=light] 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