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ease}.category-filter-btn:hover{background-color:#f0f0f0;color:#fc5736}.category-filter-btn.active{background-color:#fc5736;color:#fff}@media (max-width:1024px){.filter-sidebar{width:240px;min-width:240px;padding:20px}}@media (max-width:768px){.mobile-filter-toggle{display:flex}.filter-sidebar{position:fixed;top:0;left:0;right:0;bottom:0;width:100%;max-width:320px;min-width:auto;z-index:1001;transform:translateX(-100%);transition:transform .3s ease;border-right:none;box-shadow:4px 0 20px rgba(0,0,0,.15);padding:60px 24px 24px;overflow-y:auto}.filter-sidebar.open{transform:translateX(0)}.filter-sidebar.closed{transform:translateX(-100%)}.mobile-close-btn{display:flex;align-items:center;justify-content:center}.mobile-apply-btn{display:block}.filter-overlay{display:block;position:fixed;top:0;left:0;right:0;bottom:0;background-color:rgba(0,0,0,.5);z-index:1000;opacity:0;animation:fadeIn .2s ease forwards}@keyframes fadeIn{to{opacity:1}}.categories-list{max-height:none}}@media (max-width:480px){.filter-sidebar{max-width:100%;padding:60px 16px 16px}.active-filter-badge{font-size:13px;padding:6px 12px}}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.topic-grid-empty{grid-column:1/-1;text-align:center;padding:60px 20px;color:#888;font-size:16px}.topic-card{display:flex;flex-direction:column;gap:8px;background-color:#f0f0f0;border:1px solid #e0e0e0;border-radius:8px;padding:20px;color:#333;text-decoration:none;transition:all .2s ease}.topic-card:hover{background-color:#e8e8e8;border-color:#fc5736;color:#fc5736;transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.08)}.topic-card-title{font-size:15px;font-weight:500;line-height:1.4}.topic-region-badge{display:inline-block;font-size:11px;font-weight:600;padding:4px 8px;border-radius:4px;text-transform:uppercase;letter-spacing:.5px;align-self:flex-start}.topic-region-badge.states{background-color:#e3f2fd;color:#1565c0}.topic-region-badge.countries{background-color:#e8f5e9;color:#2e7d32}@media (max-width:1024px){.topic-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}.topic-card{padding:16px}}@media (max-width:768px){.topic-grid{grid-template-columns:repeat(2,1fr);gap:12px}.topic-card{padding:14px}.topic-card-title{font-size:14px}.topic-region-badge{font-size:10px;padding:3px 6px}}@media (max-width:480px){.topic-grid{grid-template-columns:1fr;gap:10px}.topic-card{padding:16px}.topic-card-title{font-size:15px}}