.category-cards-container{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;padding:16px;max-height:60vh;overflow-y:auto}.category-card{display:flex;flex-direction:column;padding:12px;border:2px solid transparent;border-radius:12px;background-color:#2a2a2a;cursor:pointer;transition:all .3s ease;position:relative;min-height:auto}.category-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000001a;background-color:#333}.category-card.selected{border-color:#5e5df0;background-color:#5e5df01a}.category-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.category-card-title{display:flex;align-items:center;gap:8px;font-weight:600;font-size:16px;color:#fff}.category-icon{font-size:24px;line-height:1}.category-name{flex:1}.new-badge{display:inline-block;background-color:#ff4757;color:#fff;padding:2px 8px;border-radius:12px;font-size:11px;font-weight:700;animation:pulse 2s infinite;margin-left:8px}@keyframes pulse{0%{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.8}to{transform:scale(1);opacity:1}}.difficulty-badge{display:inline-block;padding:4px 8px;border-radius:12px;font-size:12px;font-weight:700;text-transform:uppercase}.difficulty-easy{background-color:#4caf50;color:#fff}.difficulty-medium{background-color:#ff9800;color:#fff}.difficulty-hard{background-color:#f44336;color:#fff}.category-card-stats{display:flex;align-items:center;justify-content:space-between;margin-top:8px;font-size:14px;color:#ccc}.word-count{font-size:12px;color:#aaa}.selected-indicator{position:absolute;top:8px;right:8px;background-color:#5e5df0;color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;animation:selectedPop .3s ease}@keyframes selectedPop{0%{transform:scale(0);opacity:0}50%{transform:scale(1.2)}to{transform:scale(1);opacity:1}}.category-filter-container{padding:16px 16px 24px;background-color:#1a1a1a;border-bottom:1px solid #444;display:flex;flex-direction:column;gap:16px}.filter-row{display:flex;justify-content:space-between;align-items:center;width:100%;background-color:#2c2c2e;padding:12px;border-radius:16px}.difficulty-filters{display:flex;gap:8px}.bulk-actions{display:flex;justify-content:space-between;width:100%}.checkbox-label{cursor:pointer;font-size:14px;color:#fff;position:relative;-webkit-user-select:none;user-select:none;display:inline-block}.checkbox-label input[type=checkbox]{position:absolute;opacity:0;width:0;height:0}.pill-style .checkmark{display:inline-block;padding:6px 14px;border-radius:20px;background-color:#3a3a3a;color:#f0f0f0;border:1px solid #555;transition:background-color .2s ease,border-color .2s ease}.checkbox-label.pill-style:hover .checkmark{background-color:#4a4a4a}.checkbox-label input[type=checkbox]:checked+.checkmark{background-color:#5e5df0;border-color:#5e5df0;color:#fff;font-weight:600}.checkbox-label input[type=checkbox]:focus-visible+.checkmark{box-shadow:0 0 0 2px #1a1a1a,0 0 0 4px #7a79e0}.category-drawer-footer{position:absolute;bottom:0;left:0;right:0;padding:16px;background-color:#2a2a2a;border-top:1px solid #333333;display:flex;align-items:center;justify-content:space-between;transform:translateY(100%);transition:transform .3s ease;box-shadow:0 -2px 10px #0000001a;z-index:10}.category-drawer-footer.visible{transform:translateY(0)}.footer-selected-count{font-size:14px;font-weight:500;color:#fff}.btn-small{padding:6px 12px;font-size:12px;border-radius:4px}.btn-secondary{background-color:#3a3a3a;color:#f0f0f0;border:1px solid #555;cursor:pointer;transition:all .3s ease;border-radius:8px;padding:8px 16px;font-weight:600}.btn-secondary:hover{background-color:#4a4a4a;border-color:#777}#selectAllBtn.btn-secondary:hover,#selectAllBtn.btn-secondary:active{background-color:#5e5df0;border-color:#5e5df0;color:#fff}@media (max-width: 768px){.category-cards-container{grid-template-columns:1fr;padding:12px;gap:12px}.category-card{min-height:80px;padding:12px}.category-card-title{font-size:14px}.category-icon{font-size:20px}.category-filter-container{flex-direction:column;align-items:stretch}.filter-controls,.bulk-actions{width:100%;justify-content:space-between}.filter-label{min-width:auto}}@media (min-width: 769px) and (max-width: 1024px){.category-cards-container{grid-template-columns:repeat(2,1fr)}}.category-drawer{transition:transform .3s ease}.category-drawer.is-open{transform:translateY(0)}.category-cards-container::-webkit-scrollbar{width:6px}.category-cards-container::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.category-cards-container::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.category-cards-container::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.category-card{animation:cardFadeIn .3s ease}@keyframes cardFadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.category-card{background-color:#2a2a2a;color:#fff}.category-card:hover{background-color:#333}.category-card-title{color:#fff}.filter-select{background-color:#2a2a2a;border-color:#444;color:#fff}