:root{--primary-color: #6366f1;--primary-hover: #5558e3;--primary-light: rgba(99, 102, 241, .1);--secondary-color: #64748b;--secondary-hover: #475569;--success-color: #10b981;--bg-color: #0f172a;--bg-secondary: #1e293b;--bg-card: #1e293b;--text-color: #f1f5f9;--text-muted: #94a3b8;--border-color: #334155;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4);--radius: 12px;--radius-lg: 16px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-color);color:var(--text-color);min-height:100vh;line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column}.header{text-align:center;margin-bottom:2rem;padding:2rem 0}.header h1{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary-color) 0%,#a855f7 100%);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:.5rem;letter-spacing:-.02em}.header .subtitle{color:var(--text-muted);font-size:1.1rem}.tabs{display:flex;gap:.5rem;background:var(--bg-secondary);padding:.5rem;border-radius:var(--radius-lg);margin-bottom:2rem;border:1px solid var(--border-color)}.tab-btn{flex:1;padding:1rem 1.5rem;background:transparent;border:none;border-radius:var(--radius);color:var(--text-muted);font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:.5rem}.tab-btn:hover{color:var(--text-color);background:#ffffff0d}.tab-btn.active{background:var(--primary-color);color:#fff;box-shadow:var(--shadow)}.main-content{flex:1}.tab-panel{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.upload-section{margin-bottom:2rem}.upload-zone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:4rem 2rem;text-align:center;cursor:pointer;transition:var(--transition);background:var(--bg-secondary)}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--primary-color);background:var(--primary-light)}.upload-icon{font-size:4rem;margin-bottom:1rem;filter:grayscale(.3)}.upload-text{font-size:1.25rem;font-weight:600;color:var(--text-color);margin-bottom:.5rem}.upload-hint{color:var(--text-muted);font-size:.9rem}.controls{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;padding:1.5rem;background:var(--bg-secondary);border-radius:var(--radius);margin-bottom:2rem;border:1px solid var(--border-color)}.file-info{display:flex;gap:1rem;align-items:center}.file-name{font-weight:600;color:var(--text-color)}.page-count{color:var(--text-muted);font-size:.9rem}.control-buttons{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.scale-control{display:flex;align-items:center;gap:.5rem;color:var(--text-muted)}.scale-control select,.template-select select{padding:.5rem 1rem;border-radius:var(--radius);border:1px solid var(--border-color);background:var(--bg-color);color:var(--text-color);font-size:.9rem;cursor:pointer}.btn{padding:.75rem 1.5rem;border-radius:var(--radius);border:none;font-size:.95rem;font-weight:600;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;gap:.5rem}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--primary-color) 0%,#a855f7 100%);color:#fff;box-shadow:var(--shadow)}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:var(--bg-color);color:var(--text-color);border:1px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--primary-color)}.progress-container{margin-bottom:2rem}.progress-bar{height:8px;background:var(--bg-secondary);border-radius:4px;overflow:hidden;margin-bottom:.5rem}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-color) 0%,#a855f7 100%);border-radius:4px;transition:width .3s ease}.progress-text{text-align:center;color:var(--text-muted);font-size:.9rem}.images-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.image-card{background:var(--bg-secondary);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-color);transition:var(--transition);animation:slideUp .4s ease both;position:relative}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.image-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.image-card.selected{border-color:var(--success-color);box-shadow:0 0 0 2px #10b9814d}.image-checkbox{position:absolute;top:.75rem;left:.75rem;z-index:10;cursor:pointer}.image-checkbox input{display:none}.image-checkbox .checkmark{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:#00000080;border:2px solid rgba(255,255,255,.5);border-radius:6px;transition:var(--transition)}.image-checkbox .checkmark:after{content:"";width:6px;height:10px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg) scale(0);transition:transform .2s ease}.image-checkbox input:checked+.checkmark{background:var(--success-color);border-color:var(--success-color)}.image-checkbox input:checked+.checkmark:after{transform:rotate(45deg) scale(1)}.image-checkbox:hover .checkmark{border-color:var(--primary-color);background:#6366f14d}.selected-count{color:var(--success-color);font-size:.9rem;font-weight:600}.image-wrapper{aspect-ratio:4/3;overflow:hidden;background:var(--bg-color)}.image-wrapper img{width:100%;height:100%;object-fit:contain}.image-info{padding:1rem;display:flex;justify-content:space-between;align-items:center}.page-label{font-weight:600;color:var(--text-color)}.image-size{color:var(--text-muted);font-size:.85rem;margin-left:.5rem}.image-actions{display:flex;gap:.5rem}.copy-btn{background:var(--bg-color);color:var(--text-color);border:1px solid var(--border-color);padding:.5rem .75rem;border-radius:var(--radius);font-size:1rem;cursor:pointer;transition:var(--transition)}.copy-btn:hover{background:var(--primary-light);border-color:var(--primary-color)}.copy-btn.copied{background:var(--success-color);border-color:var(--success-color);color:#fff}.download-btn{background:var(--primary-color);color:#fff;border:none;padding:.5rem .75rem;border-radius:var(--radius);font-size:1rem;cursor:pointer;transition:var(--transition)}.download-btn:hover{background:var(--primary-hover)}.thumbnail-nav{position:sticky;top:0;z-index:100;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius);padding:.75rem;margin-bottom:1.5rem;overflow:hidden}.thumbnail-nav-inner{display:flex;gap:.5rem;overflow-x:auto;padding-bottom:.5rem;scrollbar-width:thin;scrollbar-color:var(--primary-color) 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scale(1.1)}.preview-prev{left:2rem}.preview-next{right:2rem}.preview-info{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);background:#0009;color:#fff;padding:.75rem 1.5rem;border-radius:var(--radius);font-size:.95rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.image-wrapper{aspect-ratio:4/3;overflow:hidden;background:var(--bg-color);cursor:zoom-in}.md-editor-container{background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px solid var(--border-color);overflow:hidden}.md-toolbar{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background:var(--bg-color);border-bottom:1px solid var(--border-color);flex-wrap:wrap;gap:1rem}.toolbar-title{font-weight:600;color:var(--text-color)}.toolbar-right{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.template-select{display:flex;align-items:center;gap:.5rem;color:var(--text-muted)}.md-editor-wrapper{display:grid;grid-template-columns:1fr 1fr;min-height:500px}.md-editor{width:100%;height:100%;min-height:500px;padding:1.5rem;border:none;border-right:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-color);font-family:Fira Code,Consolas,monospace;font-size:.95rem;line-height:1.7;resize:none;outline:none}.md-editor::placeholder{color:var(--text-muted);opacity:.5}.md-preview{padding:1.5rem;overflow-y:auto;background:var(--bg-color)}.preview-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);text-align:center}.preview-icon{font-size:3rem;margin-bottom:1rem;opacity:.5}.preview-placeholder .hint{font-size:.9rem;opacity:.7}.md-preview h1,.md-preview h2,.md-preview h3,.md-preview h4,.md-preview h5,.md-preview h6{margin:1.5em 0 .5em;font-weight:600;color:var(--text-color)}.md-preview h1{font-size:1.8rem}.md-preview h2{font-size:1.5rem}.md-preview h3{font-size:1.25rem}.md-preview p{margin:.75em 0}.md-preview ul,.md-preview 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0;color:var(--text-muted);font-size:.9rem;margin-top:auto}@media(max-width:768px){.container{padding:1rem}.header h1{font-size:1.8rem}.tabs{flex-direction:column}.controls{flex-direction:column;align-items:flex-start}.control-buttons{width:100%;justify-content:flex-start}.md-editor-wrapper{grid-template-columns:1fr}.md-editor{border-right:none;border-bottom:1px solid var(--border-color);min-height:300px}.md-preview{min-height:300px}.images-grid{grid-template-columns:1fr}}.example-buttons{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem;flex-wrap:wrap}.example-buttons span{color:var(--text-muted);font-size:.9rem}.btn-sm{padding:.4rem .8rem;font-size:.85rem}.diagram-editor-container{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-bottom:1.5rem}.mermaid-input-section,.mermaid-preview-section{background:var(--bg-secondary);border-radius:var(--radius);border:1px solid var(--border-color);overflow:hidden;display:flex;flex-direction:column}.mermaid-toolbar{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background:var(--bg-color);border-bottom:1px solid var(--border-color);flex-wrap:wrap;gap:.5rem}.mermaid-toolbar .toolbar-title{font-weight:600;color:var(--text-color);font-size:.95rem}.toolbar-actions{display:flex;gap:.5rem;flex-wrap:wrap}.mermaid-editor{width:100%;min-height:150px;padding:1rem;border:none;background:var(--bg-secondary);color:var(--text-color);font-family:Fira 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1.5rem}.diagram-tips p{margin:.5rem 0;font-size:.9rem;color:var(--text-muted)}.diagram-tips p:first-child{margin-top:0}.diagram-tips p:last-child{margin-bottom:0}.diagram-tips strong{color:var(--text-color)}.diagram-tips a{color:var(--primary-color);text-decoration:none}.diagram-tips a:hover{text-decoration:underline}@media(max-width:768px){.diagram-editor-container{grid-template-columns:1fr}.mermaid-toolbar{flex-direction:column;align-items:flex-start}.toolbar-actions{width:100%}.mermaid-editor.full-height{min-height:250px}.mermaid-preview{min-height:300px}}