@keyframes marching-ants{0%{background-position:0 0,0 100%,0 0,100% 0}to{background-position:20px 0,-20px 100%,0 -20px,100% 20px}}:root{--rc-drag-handle-size:12px;--rc-drag-handle-mobile-size:24px;--rc-drag-handle-bg-colour:#0003;--rc-drag-bar-size:6px;--rc-border-color:#ffffffb3;--rc-focus-color:#08f}.ReactCrop{cursor:crosshair;max-width:100%;display:inline-block;position:relative}.ReactCrop *,.ReactCrop :before,.ReactCrop :after{box-sizing:border-box}.ReactCrop--disabled,.ReactCrop--locked{cursor:inherit}.ReactCrop__child-wrapper{max-height:inherit;overflow:hidden}.ReactCrop__child-wrapper>img,.ReactCrop__child-wrapper>video{max-width:100%;max-height:inherit;display:block}.ReactCrop:not(.ReactCrop--disabled) .ReactCrop__child-wrapper>img,.ReactCrop:not(.ReactCrop--disabled) .ReactCrop__child-wrapper>video,.ReactCrop:not(.ReactCrop--disabled) .ReactCrop__crop-selection{touch-action:none}.ReactCrop__crop-mask{pointer-events:none;width:calc(100% + .5px);height:calc(100% + .5px);position:absolute;top:0;right:0;bottom:0;left:0}.ReactCrop__crop-selection{cursor:move;position:absolute;top:0;left:0;transform:translate(0)}.ReactCrop--disabled .ReactCrop__crop-selection{cursor:inherit}.ReactCrop--circular-crop .ReactCrop__crop-selection{border-radius:50%}.ReactCrop--circular-crop .ReactCrop__crop-selection:after{pointer-events:none;content:"";border:1px solid var(--rc-border-color);opacity:.3;position:absolute;top:-1px;right:-1px;bottom:-1px;left:-1px}.ReactCrop--no-animate .ReactCrop__crop-selection{outline:1px dashed #fff}.ReactCrop__crop-selection:not(.ReactCrop--no-animate .ReactCrop__crop-selection){color:#fff;background-image:linear-gradient(90deg,#fff 50%,#444 50%),linear-gradient(90deg,#fff 50%,#444 50%),linear-gradient(#fff 50%,#444 50%),linear-gradient(#fff 50%,#444 50%);background-position:0 0,0 100%,0 0,100% 0;background-repeat:repeat-x,repeat-x,repeat-y,repeat-y;background-size:10px 1px,10px 1px,1px 10px,1px 10px;animation:1s linear infinite marching-ants}.ReactCrop__crop-selection:focus{outline:2px solid var(--rc-focus-color);outline-offset:-1px}.ReactCrop--invisible-crop .ReactCrop__crop-mask,.ReactCrop--invisible-crop .ReactCrop__crop-selection{display:none}.ReactCrop__rule-of-thirds-vt:before,.ReactCrop__rule-of-thirds-vt:after,.ReactCrop__rule-of-thirds-hz:before,.ReactCrop__rule-of-thirds-hz:after{content:"";background-color:#fff6;display:block;position:absolute}.ReactCrop__rule-of-thirds-vt:before,.ReactCrop__rule-of-thirds-vt:after{width:1px;height:100%}.ReactCrop__rule-of-thirds-vt:before{left:33.3333%}.ReactCrop__rule-of-thirds-vt:after{left:66.6667%}.ReactCrop__rule-of-thirds-hz:before,.ReactCrop__rule-of-thirds-hz:after{width:100%;height:1px}.ReactCrop__rule-of-thirds-hz:before{top:33.3333%}.ReactCrop__rule-of-thirds-hz:after{top:66.6667%}.ReactCrop__drag-handle{width:var(--rc-drag-handle-size);height:var(--rc-drag-handle-size);background-color:var(--rc-drag-handle-bg-colour);border:1px solid var(--rc-border-color);position:absolute}.ReactCrop__drag-handle:focus{background:var(--rc-focus-color)}.ReactCrop .ord-nw{cursor:nw-resize;top:0;left:0;transform:translate(-50%,-50%)}.ReactCrop .ord-n{cursor:n-resize;top:0;left:50%;transform:translate(-50%,-50%)}.ReactCrop .ord-ne{cursor:ne-resize;top:0;right:0;transform:translate(50%,-50%)}.ReactCrop .ord-e{cursor:e-resize;top:50%;right:0;transform:translate(50%,-50%)}.ReactCrop .ord-se{cursor:se-resize;bottom:0;right:0;transform:translate(50%,50%)}.ReactCrop .ord-s{cursor:s-resize;bottom:0;left:50%;transform:translate(-50%,50%)}.ReactCrop .ord-sw{cursor:sw-resize;bottom:0;left:0;transform:translate(-50%,50%)}.ReactCrop .ord-w{cursor:w-resize;top:50%;left:0;transform:translate(-50%,-50%)}.ReactCrop__disabled .ReactCrop__drag-handle{cursor:inherit}.ReactCrop__drag-bar{position:absolute}.ReactCrop__drag-bar.ord-n{width:100%;height:var(--rc-drag-bar-size);top:0;left:0;transform:translateY(-50%)}.ReactCrop__drag-bar.ord-e{width:var(--rc-drag-bar-size);height:100%;top:0;right:0;transform:translate(50%)}.ReactCrop__drag-bar.ord-s{width:100%;height:var(--rc-drag-bar-size);bottom:0;left:0;transform:translateY(50%)}.ReactCrop__drag-bar.ord-w{width:var(--rc-drag-bar-size);height:100%;top:0;left:0;transform:translate(-50%)}.ReactCrop--new-crop .ReactCrop__drag-bar,.ReactCrop--new-crop .ReactCrop__drag-handle,.ReactCrop--fixed-aspect .ReactCrop__drag-bar,.ReactCrop--fixed-aspect .ReactCrop__drag-handle.ord-n,.ReactCrop--fixed-aspect .ReactCrop__drag-handle.ord-e,.ReactCrop--fixed-aspect .ReactCrop__drag-handle.ord-s,.ReactCrop--fixed-aspect .ReactCrop__drag-handle.ord-w{display:none}@media (pointer:coarse){.ReactCrop .ord-n,.ReactCrop .ord-e,.ReactCrop .ord-s,.ReactCrop .ord-w{display:none}.ReactCrop__drag-handle{width:var(--rc-drag-handle-mobile-size);height:var(--rc-drag-handle-mobile-size)}}:root{--navbar-color: #1f2937;--page-bg: #f4f6f8;--accent-color: #2563eb}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--page-bg);color:#1f2937}.navbar{display:flex;justify-content:space-between;align-items:center;background:var(--navbar-color);color:#fff;padding:12px 24px}.navbar-brand{display:flex;align-items:center}.navbar .brand{color:#fff;font-weight:700;font-size:1.2rem;text-decoration:none}.navbar-logo{height:40px;width:auto;object-fit:contain;display:block}.nav-links{display:flex;gap:16px;align-items:center}.nav-links a{color:#fff;text-decoration:none}.nav-links a:hover{text-decoration:underline}.nav-links button{background:#ef4444;color:#fff;border:none;padding:6px 12px;border-radius:4px;cursor:pointer}.user-chip{background:#374151;padding:4px 10px;border-radius:12px;font-size:.85rem}.container{max-width:1300px;margin:24px auto;padding:0 32px}.container.flush{padding:0;margin-left:0;margin-right:0;max-width:100%}.card{background:#fff;border-radius:8px;padding:24px;margin-bottom:20px;box-shadow:0 1px 3px #0000001a}.card.narrow{max-width:420px;margin:40px auto}form{display:flex;flex-direction:column;gap:8px}label{font-weight:600;margin-top:8px}input,select,textarea{padding:8px;border:1px solid #d1d5db;border-radius:4px;font-size:1rem}textarea{min-height:70px}button{margin-top:12px;padding:10px 16px;border:none;border-radius:4px;background:var(--accent-color);color:#fff;font-size:1rem;cursor:pointer}button:hover{opacity:.88}button:disabled{background:#9ca3af;cursor:not-allowed}button.danger{background:#ef4444}button.danger:hover{background:#dc2626}.button-row{display:flex;gap:8px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.error{color:#dc2626;font-weight:600}.question-list{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.question-item{border:1px solid #e5e7eb;border-radius:8px;padding:12px;display:flex;flex-direction:column;gap:6px;background:#fff;box-shadow:0 1px 4px #00000014}.question-item .question-photo{width:100%;height:200px;object-fit:contain;border-radius:4px;border:1px solid #f0f0f0;background:#f9fafb}.question-item .question-details{flex:1;display:flex;flex-direction:column;gap:4px}.question-item .question-details p{margin:0;font-size:.88rem}.question-item .button-row{margin-top:auto;padding-top:6px}.question-text{font-weight:600;font-size:.9rem}.options{list-style:none;padding-left:0}.options li.correct{color:#16a34a;font-weight:700}.category-tag{display:inline-block;background:#e5e7eb;padding:2px 8px;border-radius:12px;font-size:.8rem}.category-chip{display:inline-flex;align-items:center;gap:4px;background:#dbeafe;color:#1e40af;border:1px solid #bfdbfe;padding:4px 10px 4px 12px;border-radius:20px;font-size:.875rem;font-weight:500}.category-chip-delete{background:none;border:none;color:#1e40af;cursor:pointer;font-size:1.1rem;line-height:1;padding:0 2px;margin:0;opacity:.6}.category-chip-delete:hover{opacity:1;color:#dc2626}.quiz-question{margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid #e5e7eb}.quiz-question-label{font-weight:600;margin-bottom:10px;color:#374151}.quiz-question-body{display:flex;gap:20px;align-items:stretch}.quiz-question-photo{flex:0 0 auto;width:70%}.quiz-question-photo img{width:100%;max-height:280px;object-fit:contain;border-radius:6px;border:1px solid #e5e7eb;display:block}.quiz-question-photo.long-photo{width:auto;flex:0 1 auto;max-width:78%}.quiz-question-photo.long-photo img{width:auto;max-width:100%;max-height:624px;object-fit:unset}.quiz-question-answer{flex:1 1 0;display:flex;flex-direction:column;gap:8px;min-width:0;min-height:0}.quiz-question-answer .answer-box{flex:1;height:auto}.option-label{display:flex;align-items:center;gap:8px;font-weight:400;padding:8px 12px;border:1px solid #e5e7eb;border-radius:6px;cursor:pointer;transition:background .15s}.option-label:hover{background:#f0f9ff;border-color:#93c5fd}.option-label input[type=radio]{margin:0;accent-color:#2563eb}.answer-box{height:100%;min-height:200px;resize:vertical}.score{font-size:1.4rem;font-weight:700}.result-correct{color:#16a34a}.result-wrong{color:#dc2626}.history-table{width:100%;border-collapse:collapse}.history-table th,.history-table td{text-align:left;padding:8px;border-bottom:1px solid #e5e7eb}.tabs{display:flex;gap:8px;margin-bottom:16px}.tab{background:#e5e7eb;color:#1f2937;margin-top:0}.category-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid #e5e7eb}.category-tab{display:flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid #d1d5db;border-radius:20px;background:#f9fafb;color:#374151;font-size:.875rem;cursor:pointer;font-weight:500;margin-top:0;transition:background .15s,border-color .15s}.category-tab:hover{background:#f0f9ff;border-color:#93c5fd}.category-tab.active{background:#2563eb;color:#fff;border-color:#2563eb}.category-tab-count{background:#0000001a;border-radius:10px;padding:1px 7px;font-size:.78rem}.category-tab.active .category-tab-count{background:#ffffff40}.tab.active{background:#2563eb;color:#fff}.question-photo{max-width:100%;max-height:320px;display:block;margin-bottom:8px;border-radius:6px;border:1px solid #e5e7eb}.quiz-type-picker{display:flex;gap:12px}.quiz-type-picker button{flex:1}textarea.answer-box{min-height:120px;width:100%;max-width:100%;box-sizing:border-box}.ai-feedback{background:#f0f9ff;border:1px solid #bae6fd;border-radius:6px;padding:8px 12px;margin-top:4px}.quiz-picker-section{margin-top:16px}.quiz-picker-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-top:8px}.quiz-picker-card{position:relative;display:flex;flex-direction:column;border:2px solid #e5e7eb;border-radius:8px;overflow:hidden;cursor:pointer;background:#fff;transition:border-color .15s,box-shadow .15s;font-weight:400}.quiz-picker-card:hover{border-color:#93c5fd;box-shadow:0 2px 8px #2563eb1a}.quiz-picker-card.selected{border-color:#2563eb;background:#eff6ff}.picker-card-checkbox{position:absolute;top:8px;left:8px;width:18px;height:18px;accent-color:#2563eb;cursor:pointer;z-index:1}.picker-card-photo{width:100%;height:150px;object-fit:contain;background:#f9fafb;border-bottom:1px solid #e5e7eb}.picker-card-details{padding:8px 10px;display:flex;flex-direction:column;gap:4px}.picker-card-title{font-size:.85rem;font-weight:600;color:#1f2937;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.picker-card-quizzes{font-size:.75rem;color:#6b7280}.question-photo-thumb{width:48px;height:48px;object-fit:cover;border-radius:4px;border:1px solid #e5e7eb}.quiz-list-picker{display:flex;flex-direction:column;gap:8px}.quiz-list-item{display:flex;justify-content:space-between;align-items:center;border:1px solid #e5e7eb;border-radius:6px;padding:12px 16px;cursor:pointer;background:#fff}.quiz-list-item:hover{border-color:#2563eb}.category-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:16px}.category-card{border:1px solid #e5e7eb;border-radius:10px;padding:20px 16px;background:#fff;cursor:pointer;transition:border-color .15s,box-shadow .15s,transform .1s;box-shadow:0 1px 3px #00000012}.category-card:hover{border-color:#2563eb;box-shadow:0 4px 12px #2563eb1f;transform:translateY(-2px)}.category-card-name{margin:0 0 10px;font-size:1.05rem;color:#1f2937}.category-card-meta{display:flex;flex-wrap:wrap;gap:6px;font-size:.8rem;color:#6b7280;margin-bottom:10px}.category-card-marks{font-weight:600;color:#374151}.category-card-score{font-size:.9rem;border-top:1px solid #f3f4f6;padding-top:8px;margin-top:4px}.editing-highlight{border-color:#2563eb!important;background:#eff6ff}.ordered-question-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.ordered-question-item{display:flex;align-items:center;gap:8px;border:1px solid #d1d5db;border-radius:6px;padding:6px 10px;background:#f9fafb}.oq-pos{font-weight:700;color:#6b7280;min-width:20px;text-align:right}.oq-label{flex:1;font-size:.9rem}.oq-arrows{display:flex;flex-direction:column;gap:2px}.arrow-btn{margin-top:0;padding:2px 6px;font-size:.7rem;background:#e5e7eb;color:#1f2937;border-radius:3px;line-height:1}.arrow-btn:hover:not(:disabled){background:#d1d5db}.arrow-btn:disabled{background:#f3f4f6;color:#d1d5db;cursor:not-allowed}.oq-remove{margin-top:0;padding:2px 7px;font-size:.8rem;line-height:1}