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768px){.card-header{height:160px}}.card-thumbnail{width:100%;height:100%}.card-thumbnail img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}.learning-card:hover .card-thumbnail img{transform:scale(1.05)}.thumbnail-placeholder{width:100%;height:100%;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));display:flex;align-items:center;justify-content:center;color:#fff;font-size:2.5rem}@media (max-width: 768px){.thumbnail-placeholder{font-size:2rem}}.card-badges{position:absolute;top:var(--spacing-md);left:var(--spacing-md);right:var(--spacing-md);display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:var(--spacing-sm);z-index:2}.badge{padding:.3rem var(--spacing-sm);border-radius:12px;font-size:var(--font-size-xs);font-weight:600;text-transform:uppercase;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.badge.badge-new{background:rgba(239,68,68,.9);color:#fff}.badge.badge-featured{background:rgba(245,158,11,.9);color:#fff}.badge.badge-type{background:rgba(0,0,0,.7);color:#fff;display:flex;align-items:center;gap:.25rem}.card-content{padding:var(--spacing-xl)}@media (max-width: 768px){.card-content{padding:var(--spacing-lg)}}.card-title{color:var(--text-color);margin-bottom:var(--spacing-md);font-size:var(--font-size-xl);font-weight:600;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}@media (max-width: 768px){.card-title{font-size:var(--font-size-lg);margin-bottom:var(--spacing-sm)}}.card-description{color:var(--text-secondary);line-height:1.6;margin-bottom:var(--spacing-md);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:var(--font-size-base)}@media (max-width: 768px){.card-description{font-size:var(--font-size-sm);-webkit-line-clamp:2}}.card-meta{margin-bottom:var(--spacing-md)}.meta-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-sm)}.meta-row:last-child{margin-bottom:0}@media (max-width: 768px){.meta-row{flex-direction:column;align-items:flex-start;gap:var(--spacing-xs)}}.meta-item{display:flex;align-items:center;gap:var(--spacing-xs);color:var(--text-secondary);font-size:var(--font-size-sm)}.meta-item i{color:var(--primary-color);font-size:var(--font-size-sm)}.difficulty-badge{padding:.25rem var(--spacing-sm);border-radius:12px;font-size:var(--font-size-xs);font-weight:600}.difficulty-badge.difficulty-beginner{background:rgba(16,185,129,.1);color:var(--success-color);border:1px solid rgba(16,185,129,.2)}.difficulty-badge.difficulty-intermediate{background:rgba(245,158,11,.1);color:var(--warning-color);border:1px solid rgba(245,158,11,.2)}.difficulty-badge.difficulty-advanced{background:rgba(239,68,68,.1);color:var(--error-color);border:1px solid rgba(239,68,68,.2)}.card-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-xs);margin-bottom:var(--spacing-md)}.tag{background:var(--bg-secondary);color:var(--text-secondary);padding:.25rem var(--spacing-sm);border-radius:12px;font-size:var(--font-size-xs);font-weight:500;border:1px solid var(--border-color);transition:all .2s ease}.tag:hover{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.tag.tag-more{background:var(--primary-color);color:#fff;border-color:var(--primary-color);font-weight:600}.card-footer{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-xl);border-top:1px solid var(--border-color);background:var(--bg-secondary)}@media (max-width: 768px){.card-footer{padding:var(--spacing-md) var(--spacing-lg);flex-wrap:wrap;gap:var(--spacing-sm)}}.rating{display:flex;align-items:center;gap:var(--spacing-sm)}.stars{display:flex;gap:.1rem}.stars i{color:#fbbf24;font-size:var(--font-size-sm)}.rating-text{font-size:var(--font-size-sm);font-weight:600;color:var(--text-color)}.views{display:flex;align-items:center;gap:.25rem;color:var(--text-secondary);font-size:var(--font-size-sm)}.card-actions{display:flex;gap:var(--spacing-sm)}.action-btn{width:32px;height:32px;border:none;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);font-size:var(--font-size-sm)}.action-btn.download-btn{background:var(--accent-color);color:#fff}.action-btn.download-btn:hover{background:#0891b2;transform:scale(1.1)}.action-btn.view-btn{background:var(--primary-color);color:#fff}.action-btn.view-btn:hover{background:var(--secondary-color);transform:scale(1.1)}.empty-state{text-align:center;padding:var(--spacing-3xl) var(--spacing-xl);color:var(--text-secondary)}@media (max-width: 768px){.empty-state{padding:var(--spacing-2xl) var(--spacing-md)}}.empty-icon{font-size:3rem;margin-bottom:var(--spacing-lg);opacity:.5}@media (max-width: 768px){.empty-icon{font-size:2.5rem;margin-bottom:var(--spacing-md)}}.empty-state h3{margin-bottom:var(--spacing-md);color:var(--text-color);font-size:var(--font-size-xl)}@media (max-width: 768px){.empty-state h3{font-size:var(--font-size-lg);margin-bottom:var(--spacing-sm)}}.empty-state p{font-size:var(--font-size-base)}@media (max-width: 768px){.empty-state p{font-size:var(--font-size-sm)}}.animate{opacity:1!important;transform:translateY(0)!important}.text-center{text-align:center}.mb-0{margin-bottom:0}.mb-1{margin-bottom:var(--spacing-xs)}.mb-2{margin-bottom:var(--spacing-sm)}.mb-3{margin-bottom:var(--spacing-md)}.mb-4{margin-bottom:var(--spacing-lg)}.mb-5{margin-bottom:var(--spacing-xl)}.mt-0{margin-top:0}.mt-1{margin-top:var(--spacing-xs)}.mt-2{margin-top:var(--spacing-sm)}.mt-3{margin-top:var(--spacing-md)}.mt-4{margin-top:var(--spacing-lg)}.mt-5{margin-top:var(--spacing-xl)}.loading{opacity:.6;pointer-events:none}.loading:after{content:"";position:absolute;top:50%;left:50%;width:20px;height:20px;margin:-10px 0 0 -10px;border:2px solid var(--primary-color);border-top-color:transparent;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media print{*{background:white!important;color:#000!important;box-shadow:none!important}#navbar,.social-links,.cta-button,.contact-form,.card-actions{display:none!important}.hero{height:auto;padding:2rem 0}.section{padding:1rem 0;page-break-inside:avoid}.learning-card,.timeline-content,.stat{page-break-inside:avoid}}