:root{--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "Menlo", "Monaco", "Consolas", "Liberation Mono", "Courier New", monospace;--font-size-base: 18px;--font-size-sm: 13px;--font-size-xs: 13px;--line-height: 1.5;--space-xs: 4px;--space-sm: 8px;--space-md: 12px;--space-lg: 16px;--space-xl: 24px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 20px;--shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);--shadow-lg: 0 12px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);--shadow-toolbar: 0 1px 0 rgba(0,0,0,.06);--transition-fast: .12s ease;--transition-normal: .2s ease;--transition-slow: .35s cubic-bezier(.4, 0, .2, 1)}[data-theme=light]{--bg-app: #FAF8F5;--bg-toolbar: rgba(255, 255, 253, .82);--bg-editor: #FFFFFE;--bg-line-numbers: #F5F3F0;--bg-status-bar: rgba(245, 243, 240, .92);--bg-search: rgba(255, 255, 253, 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.12);--scrollbar-track: transparent;--toolbar-blur: blur(20px) saturate(150%);--shadow-sm: 0 1px 3px rgba(0,0,0,.2);--shadow-md: 0 4px 12px rgba(0,0,0,.25);--shadow-lg: 0 12px 40px rgba(0,0,0,.4);--shadow-toolbar: 0 1px 0 rgba(255,255,255,.04)}[data-theme=high-contrast]{--bg-app: #000000;--bg-toolbar: rgba(10, 10, 10, .95);--bg-editor: #0A0A0A;--bg-line-numbers: #050505;--bg-status-bar: rgba(5, 5, 5, .95);--bg-search: rgba(15, 15, 15, .98);--bg-panel-header: #111111;--bg-hover: rgba(255, 255, 255, .08);--bg-active: rgba(255, 255, 255, .14);--bg-toast: #1A1A1A;--bg-splitter: #333333;--text-primary: #FFFFFF;--text-secondary: #CCCCCC;--text-tertiary: #888888;--text-line-number: #666666;--text-placeholder: #555555;--border-primary: rgba(255, 255, 255, .3);--border-subtle: rgba(255, 255, 255, .15);--border-focus: #FFDD00;--accent: #FFDD00;--accent-hover: #FFE740;--accent-light: rgba(255, 221, 0, .15);--diff-add-bg: rgba(0, 255, 0, .12);--diff-add-text: #00FF00;--diff-add-inline: rgba(0, 255, 0, .3);--diff-del-bg: rgba(255, 0, 0, .1);--diff-del-text: #FF4444;--diff-del-inline: rgba(255, 0, 0, .25);--diff-mod-bg: rgba(255, 221, 0, .1);--diff-mod-text: #FFDD00;--toast-success: #00FF00;--toast-error: #FF4444;--toast-warning: #FFDD00;--toast-info: #44AAFF;--scrollbar-thumb: rgba(255, 255, 255, .3);--scrollbar-track: transparent;--toolbar-blur: none;--shadow-sm: 0 0 0 1px rgba(255,255,255,.15);--shadow-md: 0 0 0 1px rgba(255,255,255,.2);--shadow-lg: 0 0 0 2px rgba(255,255,255,.25);--shadow-toolbar: 0 1px 0 rgba(255,255,255,.15)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:var(--font-size-base);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-ui);background:var(--bg-app);color:var(--text-primary);height:100vh;overflow:hidden;display:flex;flex-direction:column}#root{display:flex;flex-direction:column;height:100vh;overflow:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent)}#toolbar{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-lg);background:var(--bg-toolbar);backdrop-filter:var(--toolbar-blur);-webkit-backdrop-filter:var(--toolbar-blur);border-bottom:1px solid var(--border-primary);box-shadow:var(--shadow-toolbar);z-index:100;min-height:52px;flex-shrink:0;position:relative}.toolbar-group{display:flex;align-items:center;gap:2px}.toolbar-separator{width:1px;height:28px;background:var(--border-primary);margin:0 var(--space-sm);flex-shrink:0}.toolbar-btn{display:inline-flex;align-items:center;gap:var(--space-xs);padding:var(--space-xs) var(--space-sm);border:none;border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);font-family:var(--font-ui);font-size:var(--font-size-sm);font-weight:500;cursor:pointer;white-space:nowrap;transition:background var(--transition-fast),color var(--transition-fast);min-height:36px;min-width:36px;justify-content:center;-webkit-user-select:none;user-select:none}.toolbar-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.toolbar-btn:active{background:var(--bg-active)}.toolbar-btn.active{background:var(--accent-light);color:var(--accent)}.toolbar-btn:focus-visible{outline:2px 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var(--transition-fast)}.recent-item:hover{background:var(--bg-hover)}.recent-item-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--font-mono);font-size:var(--font-size-xs)}.recent-item-time{flex-shrink:0;font-size:11px;color:var(--text-tertiary)}.recent-clear{color:var(--text-tertiary)!important;font-size:var(--font-size-xs)!important;justify-content:center!important}.recent-divider{height:1px;background:var(--border-primary);margin:var(--space-xs) 0}.recent-empty{padding:var(--space-md);text-align:center;color:var(--text-tertiary);font-size:var(--font-size-xs)}.toolbar-zoom-group{display:flex;align-items:center;gap:2px;position:relative}.toolbar-zoom-display{font-family:var(--font-mono);font-size:var(--font-size-sm);font-weight:600;color:var(--text-secondary);min-width:48px;text-align:center;cursor:pointer;padding:var(--space-xs);border-radius:var(--radius-sm);transition:background 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var(--space-lg);background:var(--bg-search);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-primary);flex-shrink:0;z-index:90}.search-row{display:flex;align-items:center;gap:var(--space-sm)}.search-input-group{display:flex;align-items:center;flex:1;max-width:420px;background:var(--bg-editor);border:1px solid var(--border-primary);border-radius:var(--radius-sm);padding:0 var(--space-sm);transition:border-color var(--transition-fast)}.search-input-group:focus-within{border-color:var(--border-focus)}.search-icon{font-size:14px;color:var(--text-tertiary);flex-shrink:0}.search-field{flex:1;border:none;background:transparent;color:var(--text-primary);font-family:var(--font-mono);font-size:var(--font-size-sm);padding:var(--space-sm);outline:none;min-width:0}.search-field::placeholder{color:var(--text-placeholder)}.search-toggle-btn{border:1px solid var(--border-primary);background:transparent;color:var(--text-tertiary);font-family:var(--font-mono);font-size:var(--font-size-xs);font-weight:600;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);cursor:pointer;min-height:30px;transition:all var(--transition-fast)}.search-toggle-btn.active,.search-toggle-btn[aria-pressed=true]{background:var(--accent-light);color:var(--accent);border-color:var(--accent)}.search-nav-btn{border:none;background:transparent;color:var(--text-secondary);font-size:16px;padding:var(--space-xs);border-radius:var(--radius-sm);cursor:pointer;min-width:30px;min-height:30px;display:inline-flex;align-items:center;justify-content:center;transition:background var(--transition-fast)}.search-nav-btn:hover{background:var(--bg-hover)}.search-match-count{font-family:var(--font-mono);font-size:var(--font-size-xs);color:var(--text-tertiary);min-width:70px;text-align:center;white-space:nowrap}.search-close-btn{border:none;background:transparent;color:var(--text-tertiary);font-size:18px;padding:var(--space-xs);border-radius:var(--radius-sm);cursor:pointer;min-width:30px;min-height:30px;display:inline-flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.search-close-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.search-action-btn{border:1px solid var(--border-primary);background:transparent;color:var(--text-secondary);font-family:var(--font-ui);font-size:var(--font-size-xs);font-weight:500;padding:var(--space-xs) var(--space-md);border-radius:var(--radius-sm);cursor:pointer;min-height:30px;transition:all var(--transition-fast)}.search-action-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.replace-row{padding-left:0}#editor-container{flex:1;display:flex;overflow:hidden;position:relative}.editor-panel{display:flex;flex-direction:column;min-width:0;flex:1}.split-mode .editor-panel,.triple-mode .editor-panel{flex:none}.panel-header{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-xs) var(--space-md);background:var(--bg-panel-header);border-bottom:1px solid 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var(--transition-fast);opacity:.5}.panel-close-btn:hover{background:var(--bg-active);color:var(--text-primary);opacity:1}.editor-inner{display:flex;flex:1;overflow:hidden;position:relative}.line-numbers{width:52px;flex-shrink:0;background:var(--bg-line-numbers);color:var(--text-line-number);font-family:var(--font-mono);font-size:var(--font-size-base);line-height:calc(var(--font-size-base) * var(--line-height));padding:var(--space-md) var(--space-sm);text-align:right;overflow:hidden;-webkit-user-select:none;user-select:none;border-right:1px solid var(--border-subtle)}.line-number{height:calc(var(--font-size-base) * var(--line-height));display:flex;align-items:center;justify-content:flex-end;padding-right:var(--space-xs)}.editor-textarea{flex:1;border:none;outline:none;resize:none;background:var(--bg-editor);color:var(--text-primary);font-family:var(--font-mono);font-size:var(--font-size-base);line-height:calc(var(--font-size-base) * var(--line-height));padding:var(--space-md);-moz-tab-size:4;tab-size:4;white-space:pre-wrap;word-wrap:break-word;overflow:auto;min-width:0}.editor-textarea::placeholder{color:var(--text-placeholder);font-style:italic}.editor-textarea:focus{background:var(--bg-editor)}.editor-textarea.drag-over{background:var(--accent-light);outline:2px dashed var(--accent);outline-offset:-4px}#splitter,#splitter-2{width:8px;background:var(--bg-splitter);cursor:col-resize;flex-shrink:0;position:relative;transition:background var(--transition-fast)}#splitter{z-index:10}#splitter:hover,#splitter:active,#splitter-2:hover,#splitter-2:active{background:var(--accent)}#splitter:after,#splitter-2:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:32px;background:var(--text-tertiary);border-radius:1px;opacity:.4;transition:opacity var(--transition-fast)}#splitter:hover:after,#splitter-2:hover:after{opacity:.8}#status-bar{display:flex;align-items:center;justify-content:space-between;padding:var(--space-xs) var(--space-lg);background:var(--bg-status-bar);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-top:1px solid var(--border-primary);min-height:28px;flex-shrink:0;z-index:100}.status-left,.status-center,.status-right{display:flex;align-items:center;gap:var(--space-md)}.status-item{font-family:var(--font-mono);font-size:var(--font-size-xs);color:var(--text-tertiary);white-space:nowrap}.status-modified{color:var(--accent);font-size:16px;line-height:1}.status-zoom{cursor:pointer;padding:2px var(--space-xs);border-radius:var(--radius-sm);transition:background var(--transition-fast)}.status-zoom:hover{background:var(--bg-hover);color:var(--text-secondary)}#toast-container{position:fixed;top:64px;right:var(--space-lg);z-index:9999;display:flex;flex-direction:column;gap:var(--space-sm);pointer-events:none}.toast{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);background:var(--bg-toast);border:1px solid var(--border-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);font-size:var(--font-size-sm);color:var(--text-primary);pointer-events:auto;transform:translate(120%);opacity:0;transition:transform .3s cubic-bezier(.34,1.56,.64,1),opacity .3s ease;max-width:380px}.toast-visible{transform:translate(0);opacity:1}.toast-exit{transform:translate(120%);opacity:0}.toast-icon{font-size:16px;flex-shrink:0}.toast-success .toast-icon{color:var(--toast-success)}.toast-error .toast-icon{color:var(--toast-error)}.toast-warning .toast-icon{color:var(--toast-warning)}.toast-info .toast-icon{color:var(--toast-info)}.toast-success{border-left:3px solid var(--toast-success)}.toast-error{border-left:3px solid var(--toast-error)}.toast-warning{border-left:3px solid var(--toast-warning)}.toast-info{border-left:3px solid var(--toast-info)}.toast-message{flex:1;font-weight:500}.toast-dismiss{border:none;background:transparent;color:var(--text-tertiary);font-size:16px;cursor:pointer;padding:2px;border-radius:var(--radius-sm);transition:color var(--transition-fast);flex-shrink:0}.toast-dismiss:hover{color:var(--text-primary)}.skip-link{position:absolute;top:-100px;left:0;background:var(--accent);color:#fff;padding:var(--space-sm) var(--space-lg);z-index:10000;font-size:var(--font-size-sm);font-weight:600;border-radius:0 0 var(--radius-sm) 0;transition:top .2s ease;text-decoration:none}.skip-link:focus{top:0}:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.editor-textarea:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--border-focus)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}#editor-container{animation:fadeInUp .4s ease-out}@media(max-width:768px){.toolbar-label{display:none}.toolbar-separator{margin:0 var(--space-xs)}#toolbar{padding:var(--space-xs) var(--space-sm)}.line-numbers{width:40px}.search-input-group{max-width:100%}}@media print{#toolbar,#status-bar,#search-bar,#splitter,#splitter-2,#toast-container,.line-numbers{display:none}.editor-textarea{overflow:visible;white-space:pre-wrap}body{height:auto;overflow:visible}}