.filter-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.6);display:flex;align-items:center;justify-content:center;z-index:2000;opacity:0;pointer-events:none;transition:opacity 0.3s ease}.filter-modal-overlay.show{opacity:1;pointer-events:all}.filter-modal{background:white;border-radius:12px;max-width:500px;width:90%;max-height:80vh;display:flex;flex-direction:column;box-shadow:0 8px 32px rgba(0,0,0,0.3);transform:scale(0.9);transition:transform 0.3s ease}.filter-modal-overlay.show .filter-modal{transform:scale(1)}.filter-modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid #e0e0e0}.filter-modal-header h2{margin:0;font-size:1.5rem;color:#333}.filter-modal-close{background:none;border:none;font-size:2rem;line-height:1;cursor:pointer;color:#666;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:background-color 0.2s,color 0.2s}.filter-modal-close:hover{background-color:#f0f0f0;color:#333}.filter-warning-section{background:#fff3cd;border:1px solid #ffc107;border-radius:8px;padding:12px 16px;margin-bottom:16px}.filter-warning-section p{margin:0;color:#856404;font-size:0.9rem;font-weight:500}.filter-modal-body{padding:24px;overflow-y:auto;flex:1}.filter-section{margin-bottom:24px}.filter-section:last-child{margin-bottom:0}.filter-section-label{display:block;font-weight:600;color:#333;margin-bottom:12px;font-size:0.95rem}.filter-checkboxes{display:flex;gap:12px;flex-wrap:wrap}.filter-checkbox{display:flex;align-items:center;cursor:pointer;padding:8px 16px;border:2px solid #ddd;border-radius:8px;transition:all 0.2s;user-select:none}.filter-checkbox:hover{border-color:#4285f4;background-color:#f8f9fa}.filter-checkbox input[type="checkbox"]{margin-right:8px;cursor:pointer}.filter-checkbox input[type="checkbox"]:checked+span{font-weight:600;color:#4285f4}.filter-hint{color:#999;font-size:0.85rem;font-style:italic;margin:0;padding:8px 0}.filter-population{display:flex;flex-direction:column;gap:16px}.filter-population-input-group{display:flex;flex-direction:column;gap:8px}.filter-population-input-group label{font-size:0.85rem;font-weight:500;color:#666}.filter-population-slider{width:100%;height:6px;border-radius:3px;outline:none;-webkit-appearance:none;appearance:none;cursor:pointer;user-select:none}#population-min-slider{background:linear-gradient(to right,#4285f4 0%,#4285f4 var(--slider-percent,50%),#ddd var(--slider-percent,50%),#ddd 100%)}#population-max-slider{background:linear-gradient(to right,#ddd 0%,#ddd var(--slider-percent,50%),#4285f4 var(--slider-percent,50%),#4285f4 100%)}.filter-population-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:#4285f4;cursor:pointer;border:2px solid white;box-shadow:0 2px 4px rgba(0,0,0,0.2)}.filter-population-slider::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#4285f4;cursor:pointer;border:2px solid white;box-shadow:0 2px 4px rgba(0,0,0,0.2)}.filter-population-text{padding:10px 12px;border:2px solid #ddd;border-radius:6px;font-size:0.95rem;font-family:monospace;transition:border-color 0.2s}.filter-population-text:focus{outline:none;border-color:#4285f4}.filter-select{padding:10px 12px;border:2px solid #ddd;border-radius:6px;font-size:0.95rem;background-color:white;cursor:pointer;transition:border-color 0.2s;width:100%}.filter-select:hover:not(:disabled){border-color:#4285f4}.filter-select:focus{outline:none;border-color:#4285f4}.filter-select:disabled{background-color:#f5f5f5;cursor:not-allowed;opacity:0.6}.filter-modal-footer{padding:20px 24px;border-top:1px solid #e0e0e0;display:flex;align-items:center;justify-content:space-between;gap:16px}.filter-count{font-size:0.95rem;color:#666}.filter-count-number{font-weight:700;color:#4285f4;font-size:1.1rem}.filter-modal-buttons{display:flex;gap:12px}.filter-reset-button,.filter-apply-button{padding:10px 24px;border:none;border-radius:8px;font-size:0.95rem;font-weight:600;cursor:pointer;transition:all 0.2s}.filter-reset-button{background-color:#f0f0f0;color:#333}.filter-reset-button:hover{background-color:#e0e0e0}.filter-apply-button{background-color:#4285f4;color:white}.filter-apply-button:hover{background-color:#357ae8}#levelSelectorContainer{display:flex;flex-direction:column;gap:12px}#levelSelectorContainer label{font-size:1rem;color:var(--text-strong);font-weight:600}#levelSelector,#levelSelectorGame{border:2px solid var(--border);font-weight:500;background:linear-gradient(to bottom,white,#f8f9fa);color:var(--text-strong);cursor:pointer;transition:all 0.2s ease;box-shadow:0 2px 4px rgba(0,0,0,0.05);appearance:none;-webkit-appearance:none;-moz-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23333' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}#levelSelector:hover,#levelSelectorGame:hover{border-color:var(--accent);box-shadow:0 4px 8px rgba(0,0,0,0.1);transform:translateY(-1px)}#levelSelector:focus,#levelSelectorGame:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(66,133,244,0.15)}#levelSelector{padding:12px 32px 12px 16px;border-radius:10px;font-size:1rem}#levelSelectorContainerGame{display:inline-flex;align-items:center;margin-left:12px}#levelSelectorGame{padding:8px 28px 8px 14px;border-radius:8px;font-size:0.9rem;font-weight:600;min-width:140px}.limit-answers-container{display:flex;align-items:center;gap:8px;margin-top:8px;padding-left:calc(1.1rem + 1px)}.limit-answers-container label{cursor:pointer;display:flex;align-items:center}.limit-answers-container input[type="checkbox"]{cursor:pointer;margin:0}.limit-answers-container .limit-answers-text{font-size:0.85rem;color:#666}#filterBtn,#learningFilterBtn{padding:8px 16px;background-color:#4285f4;color:white;border:none;border-radius:8px;font-size:0.9rem;font-weight:600;cursor:pointer;transition:background-color 0.2s}#filterBtn:hover,#learningFilterBtn:hover{background-color:#357ae8}@media (max-width:600px){.filter-modal{width:95%;max-height:90vh}.filter-modal-header{padding:16px 20px}.filter-modal-header h2{font-size:1.25rem}.filter-modal-body{padding:20px}.filter-modal-footer{padding:16px 20px;flex-direction:column;align-items:stretch}.filter-count{text-align:center}.filter-modal-buttons{width:100%}.filter-reset-button,.filter-apply-button{flex:1}.limit-answers-container{gap:6px;margin-top:10px;align-items:center}.limit-answers-container .limit-answers-text{font-size:0.85rem;line-height:1.3}.limit-answers-container input[type="checkbox"]{flex-shrink:0}}