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.empty-hint{font-size:var(--text-sm)}.category-section{padding:var(--space-md) 0}.category-section:first-child{padding-top:0}.category-section-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:2px solid var(--border-color)}.category-section-header .cat-icon{font-size:var(--text-xl)}.category-section-header .cat-name{font-size:var(--text-lg);font-weight:700;color:var(--text-primary)}.category-section-header .cat-count{font-size:var(--text-xs);color:var(--text-tertiary);margin-left:var(--space-xs)}@media(max-width:768px){.tools-grid{grid-template-columns:1fr;gap:var(--space-sm)}}.skeleton-card{padding:var(--space-md);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg)}.skeleton-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-sm)}.skeleton-icon{width:40px;height:40px;border-radius:var(--radius-md);flex-shrink:0}.skeleton-title{height:20px;width:60%;border-radius:var(--radius-sm)}.skeleton-desc{height:14px;width:100%;border-radius:var(--radius-sm);margin-bottom:var(--space-xs)}.skeleton-tags{display:flex;gap:4px;margin-top:var(--space-sm)}.skeleton-tag{height:20px;width:52px;border-radius:var(--radius-sm)}.skeleton-pulse{background:var(--bg-tertiary);animation:skeletonPulse 1.5s ease-in-out infinite}@keyframes skeletonPulse{0%,to{opacity:1}50%{opacity:.4}}@media(prefers-reduced-motion:reduce){.skeleton-pulse{animation:none}.tool-card{transition:none}.tool-card:hover{transform:none}}@media(max-width:768px){.collections-link{display:none}}.footer{padding:var(--space-xl) 0;background:var(--bg-secondary);border-top:1px solid var(--border-color)}.footer-inner{padding:0 var(--space-lg)}.footer-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--space-md)}.footer-brand{font-size:var(--text-lg);font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.footer-links{display:flex;gap:var(--space-lg)}.footer-link{font-size:var(--text-sm);color:var(--text-secondary);transition:color var(--transition-fast)}.footer-link:hover{color:var(--color-primary)}.footer-copyright{font-size:var(--text-sm);color:var(--text-tertiary)}.back-to-top{position:fixed;bottom:32px;right:32px;width:40px;height:40px;border-radius:var(--radius-full);background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:var(--text-base);box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition-normal);z-index:999;cursor:pointer}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top.visible:hover{background:var(--color-primary-dark);transform:translateY(-2px)}.back-to-top:not(.visible):hover{background:var(--color-primary-dark)}@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}.back-to-top.visible:hover{transform:none}}@media(max-width:768px){.footer-content{flex-direction:column;text-align:center}}