@import"https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:ital,wght@0,300;0,400;0,500;0,600;1,400&family=IBM+Plex+Mono:wght@400;500&display=swap";:root{--bg: #ffffff;--bg-secondary: #fafafa;--bg-elevated: #f5f5f5;--border: #e5e5e5;--border-dark: #d4d4d4;--text-primary: #0a0a0a;--text-secondary: #525252;--text-muted: #a3a3a3;--accent: #0a0a0a;--accent-hover: #262626;--color-green: #059669;--color-green-light: #d1fae5;--color-green-hover: #047857;--color-blue: #2563eb;--color-blue-light: #dbeafe;--color-orange: #d97706;--color-orange-light: #fef3c7;--color-orange-hover: #b45309;--color-red: #dc2626;--color-red-light: #fee2e2;--color-red-hover: #b91c1c;--color-purple: #7c3aed;--color-purple-light: #ede9fe}*{box-sizing:border-box;margin:0;padding:0}body{font-family:"IBM Plex Serif",Georgia,Times New Roman,serif;background:var(--bg);color:var(--text-primary);line-height:1.7;min-height:100vh;-webkit-font-smoothing:antialiased}#root{min-height:100vh}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border-dark);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.katex{font-size:1em}.app{min-height:100vh;display:flex;flex-direction:column}.header{border-bottom:1px solid var(--border);padding:24px 0}.header-content{max-width:900px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.header h1{font-size:1.125rem;font-weight:400;letter-spacing:-.01em}.header-icon{display:none}.header-badge{font-size:.75rem;font-family:IBM Plex Mono,monospace;color:var(--text-muted)}.main-container{flex:1;max-width:1000px;margin:0 auto;padding:48px 24px 120px;width:100%}.upload-section{border:1px solid var(--border);padding:64px 40px;text-align:center;transition:all .15s ease;cursor:pointer}.upload-section:hover,.upload-section.dragover{border-color:var(--text-primary)}.upload-icon{font-size:1.5rem;margin-bottom:24px;opacity:.4}.upload-section h2{font-size:1rem;font-weight:500;margin-bottom:8px}.upload-section p{color:var(--text-secondary);font-size:.875rem;margin-bottom:32px}.upload-btn{background:var(--text-primary);color:var(--bg);border:none;padding:12px 24px;font-size:.875rem;font-weight:500;cursor:pointer;transition:background .15s;font-family:inherit}.upload-btn:hover{background:var(--accent-hover)}.upload-container{display:flex;flex-direction:column;gap:24px}.queued-files{border:1px solid var(--border);padding:20px;background:var(--bg)}.queued-files-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}.queued-files-header h3{font-size:.875rem;font-weight:500;margin:0}.btn-clear-all{background:none;border:1px solid var(--border);padding:6px 12px;font-size:.75rem;cursor:pointer;color:var(--text-secondary);font-family:inherit;transition:all .15s;border-radius:4px}.btn-clear-all:hover:not(:disabled){border-color:var(--color-red);color:var(--color-red)}.btn-clear-all:disabled{opacity:.5;cursor:not-allowed}.queued-files-list{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;max-height:300px;overflow-y:auto}.queued-file-item{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:4px}.file-icon{font-size:1.25rem;flex-shrink:0}.file-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.file-name{font-size:.875rem;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-size{font-size:.75rem;color:var(--text-muted);font-family:IBM Plex Mono,monospace}.btn-remove-file{width:28px;height:28px;border:1px solid var(--border);background:var(--bg);cursor:pointer;font-size:1rem;color:var(--text-muted);border-radius:4px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s}.btn-remove-file:hover:not(:disabled){border-color:var(--color-red);color:var(--color-red);background:var(--color-red-light)}.btn-remove-file:disabled{opacity:.5;cursor:not-allowed}.queued-files-actions{display:flex;justify-content:flex-end;padding-top:12px;border-top:1px solid var(--border)}.btn-start-parsing{padding:12px 24px;font-size:.875rem}.progress-section{border:1px solid var(--border);padding:32px;margin-bottom:32px}.progress-section h3{font-size:.875rem;font-weight:500;margin-bottom:20px}.progress-bar{height:2px;background:var(--border);margin-bottom:16px}.progress-bar-fill{height:100%;background:var(--text-primary);transition:width .3s ease}.status-text{color:var(--text-secondary);font-size:.8125rem}.metadata-section{border:1px solid var(--border);padding:24px;margin-bottom:32px}.metadata-section h3{font-size:.75rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em;margin-bottom:20px;color:var(--text-secondary)}.form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}@media (max-width: 640px){.form-row{grid-template-columns:1fr}}.form-group{display:flex;flex-direction:column;gap:8px}.form-group-full{width:100%}.form-group label{font-size:.75rem;color:var(--text-secondary)}.form-group input,.form-group select{background:var(--bg);border:1px solid var(--border);padding:10px 12px;font-size:.875rem;color:var(--text-primary);font-family:inherit;transition:border-color .15s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--text-primary)}.form-group input::placeholder{color:var(--text-muted)}.questions-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}.questions-header h2{font-size:.75rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary)}.questions-count{font-size:.75rem;font-family:IBM Plex Mono,monospace;color:var(--text-muted)}.question-card{border:1px solid var(--border);margin-bottom:16px;transition:border-color .15s}.question-card:hover{border-color:var(--border-dark)}.question-card.expanded{border-color:var(--text-primary)}.question-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;cursor:pointer;transition:background .15s}.question-header:hover{background:var(--bg-secondary)}.question-info{display:flex;align-items:center;gap:16px;flex-wrap:wrap;flex:1}.question-status{display:flex;align-items:center;gap:12px}.question-number{font-size:.875rem;font-weight:500;font-family:IBM Plex Mono,monospace}.question-badges{display:flex;gap:8px;flex-wrap:wrap}.badge{padding:2px 8px;font-size:.6875rem;font-weight:500;text-transform:uppercase;letter-spacing:.03em;border:1px solid var(--border);border-radius:3px}.badge-rw{background:var(--color-blue-light);border-color:var(--color-blue);color:var(--color-blue)}.badge-ma{background:var(--color-purple-light);border-color:var(--color-purple);color:var(--color-purple)}.badge-module{border-color:var(--text-muted);color:var(--text-secondary)}.badge-short{background:var(--color-orange-light);border-color:var(--color-orange);color:var(--color-orange)}.badge-answer{background:var(--bg-elevated);border-color:var(--text-primary);color:var(--text-primary);font-family:IBM Plex Mono,monospace}.badge-approved,.badge-saved{background:var(--color-green);color:#fff;border-color:var(--color-green)}.badge-error{background:var(--color-red);color:#fff;border-color:var(--color-red)}.question-card.approved{border-color:var(--color-green);background:var(--color-green-light)}.question-card.saved{border-color:var(--color-green);background:var(--color-green-light);opacity:.85}.question-card.saved .question-header{cursor:pointer}.question-card.save-error{border-color:var(--color-red);background:var(--color-red-light)}.save-error-banner{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--color-red-light);border-bottom:1px solid var(--color-red);color:var(--color-red);font-size:.875rem}.save-error-banner .error-icon{font-size:1rem}.save-error-banner .error-message{flex:1;font-family:IBM Plex Mono,monospace;font-size:.8125rem}.question-content.read-only{opacity:.8}.question-content.read-only input,.question-content.read-only select,.question-content.read-only textarea,.question-content.read-only button:not(.suggestion-toggle){pointer-events:none;opacity:.6}.saved-label{color:var(--color-green);font-size:.875rem;font-weight:500}.submission-banner{display:flex;align-items:center;gap:12px;padding:16px 20px;border-radius:4px;margin-bottom:24px;font-size:.9375rem}.submission-banner .banner-icon{font-size:1.25rem}.submission-banner.all_saved{background:var(--color-green-light);border:1px solid var(--color-green);color:var(--color-green)}.submission-banner.partially_saved{background:var(--color-orange-light);border:1px solid var(--color-orange);color:var(--color-orange)}.submission-banner.all_failed{background:var(--color-red-light);border:1px solid var(--color-red);color:var(--color-red)}.question-card.approved .question-header{background:transparent}.question-actions{display:flex;gap:8px;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--border)}.action-btn{padding:8px 16px;font-size:.75rem;font-weight:500;cursor:pointer;border:1px solid;background:var(--bg);font-family:inherit;transition:all .15s;border-radius:4px}.action-btn:disabled{opacity:.5;cursor:not-allowed}.action-btn-approve{background:var(--color-green-light);border-color:var(--color-green);color:var(--color-green)}.action-btn-approve:hover:not(:disabled){background:#a7f3d0;box-shadow:0 1px 3px #05966933}.action-btn-approved{background:var(--color-green);color:#fff;border-color:var(--color-green)}.action-btn-approved:hover:not(:disabled){background:var(--color-green-hover);border-color:var(--color-green-hover);box-shadow:0 1px 3px #0596694d}.action-btn-retry{background:var(--color-orange-light);border-color:var(--color-orange);color:var(--color-orange)}.action-btn-retry:hover:not(:disabled){background:#fde68a;box-shadow:0 1px 3px #d9770633}.action-btn-delete{background:var(--color-red-light);border-color:var(--color-red);color:var(--color-red)}.action-btn-delete:hover:not(:disabled){background:#fecaca;box-shadow:0 1px 3px #dc262633}.action-btn-upload{background:var(--color-blue-light);border-color:var(--color-blue);color:var(--color-blue)}.action-btn-upload:hover:not(:disabled){background:#bfdbfe;box-shadow:0 1px 3px #2563eb33}.expand-icon{color:var(--text-muted);font-size:.75rem;transition:transform .15s}.question-card.expanded .expand-icon{transform:rotate(180deg)}.question-preview{padding:0 20px 16px;color:var(--text-secondary);font-size:.875rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.question-content{border-top:1px solid var(--border);padding:24px 20px;display:flex;flex-direction:column;gap:24px}.controls-section{display:flex;flex-direction:column;gap:16px;padding-bottom:20px;border-bottom:1px solid var(--border)}.controls-actions-row{display:flex;justify-content:space-between;align-items:center;padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:4px}.controls-actions-left{display:flex;align-items:center;gap:8px}.question-order-label{font-size:.875rem;font-weight:500;color:var(--text-primary)}.question-order-input{width:70px;padding:8px 10px;border:1px solid var(--border);border-radius:4px;font-family:IBM Plex Mono,monospace;font-size:.875rem;font-weight:600;text-align:center;color:var(--text-primary);background:var(--bg)}.question-order-input:focus{outline:none;border-color:var(--text-primary)}.question-order-input::-webkit-inner-spin-button,.question-order-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.question-order-input[type=number]{-moz-appearance:textfield;-webkit-appearance:textfield;appearance:textfield}.controls-actions{display:flex;gap:8px;flex-shrink:0}.controls-settings-row{width:100%}.controls-row{display:flex;gap:16px}.control-item{flex:1}.control-item-wide{flex:1;width:100%}.control-item label,.controls-row label{display:block;font-size:.6875rem;font-weight:500;color:var(--text-muted);margin-bottom:8px;text-transform:uppercase;letter-spacing:.05em}.inline-fields-2{grid-template-columns:repeat(2,1fr)}.inline-fields-4,.inline-fields-5{grid-template-columns:repeat(4,1fr)}@media (max-width: 1100px){.inline-fields-5{grid-template-columns:repeat(2,1fr)}}@media (max-width: 900px){.inline-fields-4{grid-template-columns:repeat(2,1fr)}}@media (max-width: 600px){.controls-actions-row{flex-direction:column;align-items:flex-start;gap:12px}.controls-actions{width:100%;justify-content:flex-end}.inline-fields-2,.inline-fields-4,.inline-fields-5{grid-template-columns:1fr}}.answer-choice-select-inline{display:flex;gap:4px}.answer-choice-btn-sm{width:32px;height:32px;border:1px solid var(--border);background:var(--bg);cursor:pointer;font-family:IBM Plex Mono,monospace;font-size:.75rem;font-weight:500;color:var(--text-secondary);transition:all .15s;border-radius:4px}.answer-choice-btn-sm:hover{border-color:var(--text-muted)}.answer-choice-btn-sm.selected{background:var(--color-green);border-color:var(--color-green);color:#fff}.suggested-answer-box{flex:1;background:var(--bg-secondary);border:1px solid var(--border);border-radius:4px;overflow:hidden}.suggested-answer-box.collapsed{background:var(--bg)}.suggestion-toggle{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;background:none;border:none;cursor:pointer;font-family:inherit;font-size:.6875rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;text-align:left;transition:background .15s}.suggestion-toggle:hover{background:var(--bg-secondary)}.toggle-icon{font-size:.625rem;color:var(--text-muted);width:10px}.suggestion-preview{margin-left:auto;font-size:.75rem;color:var(--text-secondary);font-weight:400;text-transform:none;letter-spacing:normal}.suggestion-content{display:flex;flex-direction:column;gap:8px;padding:0 12px 12px}.image-upload-inline{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.uploaded-images-inline{display:flex;flex-direction:column;gap:8px}.uploaded-image-inline{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.content-split{display:grid;grid-template-columns:1fr 1fr;gap:32px}.content-split>*{min-width:0;overflow:hidden}@media (max-width: 900px){.content-split{grid-template-columns:1fr}}.editor-panel{min-width:0;overflow:visible}.editor-panel h4,.preview-panel h4{font-size:.6875rem;font-weight:500;color:var(--text-muted);margin-bottom:16px;text-transform:uppercase;letter-spacing:.05em}.content-block{margin-bottom:20px}.content-block:last-child{margin-bottom:0}.content-block label{display:block;font-size:.6875rem;font-weight:500;color:var(--text-muted);margin-bottom:8px;text-transform:uppercase;letter-spacing:.05em}.content-block textarea{width:100%;max-width:100%;min-height:160px;background:var(--bg);border:1px solid var(--border);padding:12px;font-family:IBM Plex Mono,monospace;font-size:.8125rem;color:var(--text-primary);resize:vertical;transition:border-color .15s;line-height:1.6;box-sizing:border-box}.content-block textarea:focus{outline:none;border-color:var(--text-primary)}.inline-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}.inline-fields-3{grid-template-columns:1fr 1fr 1fr}@media (max-width: 768px){.inline-fields-3{grid-template-columns:1fr}}.inline-field{display:flex;flex-direction:column;gap:8px}.inline-field label{font-size:.6875rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.inline-field select,.inline-field input{background:var(--bg);border:1px solid var(--border);padding:10px 12px;font-size:.875rem;color:var(--text-primary);font-family:inherit;transition:border-color .15s}.inline-field select:focus,.inline-field input:focus{outline:none;border-color:var(--text-primary)}.inline-field input::placeholder{color:var(--text-muted)}.answer-input{width:100%;background:var(--bg);border:1px solid var(--border);padding:12px;font-size:.875rem;color:var(--text-primary);font-family:IBM Plex Mono,monospace;transition:border-color .15s}.answer-input:focus{outline:none;border-color:var(--text-primary)}.answer-input::placeholder{color:var(--text-muted);font-family:inherit}.answer-choice-select{display:flex;gap:8px}.answer-choice-btn{width:40px;height:40px;border:1px solid var(--border);background:var(--bg);cursor:pointer;font-family:IBM Plex Mono,monospace;font-size:.875rem;font-weight:500;color:var(--text-secondary);transition:all .15s;border-radius:4px}.answer-choice-btn:hover{border-color:var(--text-primary);color:var(--text-primary)}.answer-choice-btn.selected{background:var(--color-green);border-color:var(--color-green);color:#fff}.answer-choice-btn.selected:hover{background:var(--color-green-hover);border-color:var(--color-green-hover)}.suggested-answer{background:var(--bg-secondary);padding:12px;border:1px solid var(--border)}.suggestion-box{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;overflow:hidden}.suggestion-answer{font-family:IBM Plex Mono,monospace;font-size:13px;font-weight:600;color:var(--text-primary)}.suggestion-explanation{font-size:.8125rem;color:var(--text-secondary);line-height:1.5;word-wrap:break-word;overflow-wrap:break-word}.preview-panel{background:var(--bg-secondary);border:1px solid var(--border);padding:20px;height:fit-content;min-width:0;overflow:hidden;border-radius:4px}.editor-panel{border:1px solid var(--border);padding:20px;border-radius:4px;background:var(--bg)}.preview-passage{margin-bottom:16px;font-size:.875rem;line-height:1.8}.preview-question{font-weight:400;margin-bottom:20px;font-size:.875rem;line-height:1.7}.preview-choices{display:flex;flex-direction:column;gap:10px}.preview-choice{display:flex;align-items:center;gap:16px;padding:12px 14px;background:var(--bg);border:1px solid var(--border-dark);border-radius:10px;font-size:.875rem;line-height:1.6;word-break:keep-all;transition:border-color .15s}.choice-letter{min-width:21px;height:21px;border:1.5px solid var(--text-muted);border-radius:21px;display:flex;align-items:center;justify-content:center;font-weight:500;font-size:.75rem;flex-shrink:0;font-family:IBM Plex Mono,monospace;color:var(--text-muted)}.choice-letter.correct{background:var(--color-green);color:#fff;border-color:var(--color-green)}.choice-content{flex:1;word-break:keep-all}.preview-choice.correct{border-color:var(--color-green);background:var(--color-green-light)}.preview-written-answer{padding:16px;border-radius:8px;border:1px solid var(--border);background:var(--bg);margin-top:16px}.written-answer-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-right:8px}.written-answer-value{font-family:IBM Plex Mono,monospace;font-size:.75rem;font-weight:500;color:var(--text-primary)}.latex-container{display:inline-block;padding:2px 0}.latex-error{background:var(--color-red-light);color:var(--color-red);padding:2px 4px;border-radius:2px}.quote{padding-left:16px}.table_container{width:100%;display:flex;flex-direction:column;align-items:start;margin:10px 0;overflow-x:auto}.table_title,.table-title{font-weight:600;margin-bottom:8px;font-size:.875rem}table{margin:10px 0;border-spacing:0;border:1px solid #000000;border-collapse:collapse;font-size:.875rem}table th,table td{padding:4px 8px;border:1px solid #000000;text-align:left}table th{font-weight:700;background:var(--bg-elevated)}.blank{display:inline-block;min-width:80px;border-bottom:2px solid var(--text-primary);color:transparent}.preview-panel h,.preview-passage h,.preview-question h{font-weight:700;font-size:1rem;line-height:1.5;color:var(--text-primary);display:block;margin:12px 0}.preview-panel b,.preview-passage b,.preview-question b{font-weight:600}.preview-panel i,.preview-passage i,.preview-question i{font-style:italic}.preview-panel u,.preview-passage u,.preview-question u{text-decoration:underline}.preview-panel ul,.preview-passage ul,.preview-question ul{margin:12px 0;padding-left:24px}.preview-panel li,.preview-passage li,.preview-question li{margin-bottom:4px}.question-image{max-width:100%;max-height:320px;object-fit:contain;display:block;border-radius:4px}.image-figure{margin:16px 0;text-align:center}.image-placeholder{background:var(--bg-elevated);border:1px dashed var(--border-dark);padding:20px;text-align:center;margin:12px 0;border-radius:4px}.choices-list{display:flex;flex-direction:column;gap:12px}.choice-item{display:flex;gap:8px;align-items:flex-start}.choice-label{width:24px;height:24px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-weight:500;font-size:.75rem;flex-shrink:0;margin-top:10px;font-family:IBM Plex Mono,monospace}.choice-label.correct{background:var(--text-primary);color:var(--bg);border-color:var(--text-primary)}.choice-item textarea{flex:1;min-height:100px}.tag-selector{position:relative;width:100%}.tag-selector-toggle{width:100%;display:flex;justify-content:space-between;align-items:center;padding:12px 14px;background:var(--bg);border:1px solid var(--border);border-radius:4px;cursor:pointer;font-family:inherit;font-size:.875rem;color:var(--text-secondary);transition:all .15s;text-align:left}.tag-selector-toggle:hover{border-color:var(--text-muted)}.tag-selector-toggle.complete{color:var(--text-primary);border-color:var(--text-primary);background:var(--bg-elevated)}.tag-breadcrumb{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tag-toggle-icon{font-size:.75rem;color:var(--text-muted);margin-left:8px}.tag-selector-panel{position:absolute;top:calc(100% + 4px);left:0;right:0;background:var(--bg);border:1px solid var(--border);border-radius:4px;box-shadow:0 4px 12px #0000001a;z-index:100;max-height:400px;overflow-y:auto}.tag-level{padding:12px;border-bottom:1px solid var(--border)}.tag-level:last-child{border-bottom:none}.tag-level-label{font-size:.6875rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}.tag-options{display:flex;flex-wrap:wrap;gap:8px}.tag-options-list{flex-direction:column}.tag-option{padding:8px 12px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:4px;cursor:pointer;font-family:inherit;font-size:.8125rem;color:var(--text-secondary);transition:all .15s;text-align:left}.tag-option:hover{border-color:var(--text-muted);color:var(--text-primary)}.tag-option.selected{background:var(--text-primary);border-color:var(--text-primary);color:var(--bg)}.tag-done{padding:12px;display:flex;justify-content:flex-end}.tag-done-btn{padding:8px 16px;background:var(--color-green);border:none;border-radius:4px;cursor:pointer;font-family:inherit;font-size:.8125rem;font-weight:500;color:#fff;transition:background .15s}.tag-done-btn:hover{background:var(--color-green-hover)}.badge-tag{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border-color:var(--text-muted);color:var(--text-secondary)}.image-upload-section{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}.image-upload-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.upload-hint{font-size:.75rem;color:var(--text-muted)}.uploaded-images-list{display:flex;flex-direction:column;gap:12px}.uploaded-image-item{background:var(--bg-secondary);border:1px solid var(--border);border-radius:4px;padding:12px}.image-link-row{display:flex;align-items:center;gap:8px;margin-bottom:8px;min-width:0}.image-link{flex:1;min-width:0;background:var(--bg);border:1px solid var(--border);padding:8px 12px;font-size:.7rem;font-family:IBM Plex Mono,monospace;border-radius:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.image-instruction{font-size:.75rem;color:var(--text-secondary);margin:0;line-height:1.5}.image-instruction code{background:var(--bg-elevated);padding:1px 4px;border-radius:2px;font-family:IBM Plex Mono,monospace;font-size:.7rem}.action-btn-copy{background:var(--bg);border-color:var(--text-muted);color:var(--text-secondary);white-space:nowrap}.action-btn-copy:hover:not(:disabled){background:var(--bg-elevated);border-color:var(--text-primary);color:var(--text-primary)}.action-btn-delete-image{background:var(--color-red-light);border-color:var(--color-red);color:var(--color-red)}.action-btn-delete-image:hover:not(:disabled){background:#fecaca;box-shadow:0 1px 3px #dc262633}.preview-images{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}.preview-images h5{font-size:.6875rem;font-weight:500;color:var(--text-muted);margin-bottom:12px;text-transform:uppercase;letter-spacing:.05em}.preview-image-item{margin-bottom:12px}.preview-image-item img{max-width:100%;height:auto;border:1px solid var(--border);border-radius:4px}.preview-image-item small{display:block;font-size:.75rem;color:var(--text-muted);margin-top:4px}.image-placeholder-error{background:var(--color-red-light);color:var(--color-red);padding:12px;border-radius:4px;font-size:.75rem}.question-image{max-width:100%;height:auto;display:block;border-radius:4px}.image-figure{margin:12px 0}.image-figure figcaption{font-size:.75rem;color:var(--text-muted);margin-top:4px;text-align:center}.image-placeholder{background:var(--bg-elevated);border:1px dashed var(--border-dark);padding:16px;text-align:center;margin:12px 0;border-radius:4px}.image-placeholder span{display:block;font-size:.875rem;color:var(--text-secondary)}.image-placeholder small{display:block;font-size:.75rem;color:var(--text-muted);margin-top:4px}.actions-bar{position:fixed;bottom:0;left:0;right:0;background:var(--bg);border-top:1px solid var(--border);padding:16px 24px;display:flex;justify-content:center;align-items:center;gap:32px}.actions-summary{color:var(--text-secondary);font-size:.8125rem}.actions-summary .count{font-weight:500;color:var(--text-primary);font-family:IBM Plex Mono,monospace}.actions-buttons{display:flex;gap:12px}.btn{padding:10px 20px;font-size:.8125rem;font-weight:500;cursor:pointer;border:1px solid var(--border);transition:all .15s;font-family:inherit;display:flex;align-items:center;gap:8px;background:var(--bg);color:var(--text-primary);border-radius:4px}.btn:hover:not(:disabled){border-color:var(--text-primary)}.btn-primary{background:var(--color-green);color:#fff;border-color:var(--color-green)}.btn-primary:hover:not(:disabled){background:var(--color-green-hover);border-color:var(--color-green-hover);box-shadow:0 2px 4px #0596694d}.btn-primary:disabled{background:var(--text-muted);border-color:var(--text-muted);cursor:not-allowed}.btn-secondary{background:var(--bg);color:var(--text-primary);border-color:var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--text-muted);box-shadow:0 1px 2px #0000000d}.btn-danger{background:var(--color-red-light);color:var(--color-red);border-color:var(--color-red)}.btn-danger:hover:not(:disabled){background:#fecaca;box-shadow:0 1px 3px #dc262633}.toast-container{position:fixed;top:24px;right:24px;z-index:1000;display:flex;flex-direction:column;gap:8px}.toast{padding:12px 20px;font-size:.8125rem;animation:slideIn .2s ease;display:flex;align-items:center;gap:10px;border:1px solid var(--border);background:var(--bg)}.toast-success,.toast-error{border-color:var(--text-primary)}.toast-info{border-color:var(--text-muted)}@keyframes slideIn{0%{transform:translate(20px);opacity:0}to{transform:translate(0);opacity:1}}.spinner{width:14px;height:14px;border:1.5px solid var(--border);border-top-color:var(--text-primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:64px 20px;color:var(--text-muted)}.empty-state-icon{font-size:2rem;margin-bottom:16px;opacity:.3}.question-image{max-width:100%;height:auto;display:block}.image-figure{margin:12px 0;text-align:center}.image-figure figcaption{font-size:.75rem;color:var(--text-muted);margin-top:8px;font-style:italic}.image-placeholder{background:var(--bg-elevated);border:1px dashed var(--border);padding:20px;margin:12px 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:4px}.image-placeholder span{font-size:.875rem;color:var(--text-secondary)}.image-placeholder small{font-size:.75rem;color:var(--text-muted);font-style:italic}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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) format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.25"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}
