.page-header{max-width:1200px;margin:0 auto;padding:48px 24px 0}.page-header h1{font-family:Space Grotesk,sans-serif;font-size:2.25rem;font-weight:700;color:var(--gray-900);letter-spacing:-.03em;margin-bottom:6px}.page-header p{font-size:1.05rem;color:var(--gray-500);max-width:560px}.source-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:6px;font-size:.7rem;font-weight:600;letter-spacing:.04em;margin-left:12px;vertical-align:middle}.source-badge.online{background:#dcfce7;color:#166534}.source-badge.offline{background:#fef3c7;color:#92400e}.loading-bar{position:fixed;top:64px;left:0;right:0;height:3px;background:var(--blue-100);z-index:99;overflow:hidden;opacity:0;transition:opacity .3s}.loading-bar.active{opacity:1}.loading-bar:after{content:"";position:absolute;top:0;left:-40%;width:40%;height:100%;background:linear-gradient(90deg,transparent,var(--blue-500),transparent);animation:loadingSlide 1s ease-in-out infinite}.filters-bar{max-width:1200px;margin:28px auto 0;padding:0 24px;display:flex;gap:12px;align-items:center}.search-box{flex:1 1;max-width:420px;position:relative}.search-box input{width:100%;padding:12px 16px 12px 44px;border:1.5px solid var(--gray-200);border-radius:10px;font-family:inherit;font-size:.95rem;color:var(--gray-800);background:var(--white);outline:none;transition:all var(--transition)}.search-box input::placeholder{color:var(--gray-400)}.search-box input:focus{border-color:var(--blue-500);box-shadow:0 0 0 3px rgba(37,99,235,.1)}.search-box .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--gray-400);display:flex;pointer-events:none}.filter-group{display:flex;gap:8px;flex-wrap:wrap}.filter-chip{padding:10px 18px;border-radius:10px;border:1.5px solid var(--gray-200);background:var(--white);font-family:inherit;font-size:.85rem;font-weight:500;color:var(--gray-600);cursor:pointer;transition:all var(--transition);white-space:nowrap}.filter-chip:hover{border-color:var(--blue-400);color:var(--blue-600)}.filter-chip.active{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}.catalog{max-width:1200px;margin:32px auto 0;padding:0 24px 60px}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));grid-gap:24px;gap:24px}.course-card{background:var(--white);border-radius:var(--radius);border:1px solid var(--gray-200);overflow:hidden;cursor:pointer;transition:all var(--transition);position:relative}.course-card:after{content:"";position:absolute;inset:0;border-radius:var(--radius);border:2px solid transparent;transition:border-color var(--transition);pointer-events:none}.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--blue-400)}.course-card:hover:after{border-color:var(--blue-500)}.card-image{height:180px;position:relative;overflow:hidden}.card-image,.card-image-pattern{display:flex;align-items:center;justify-content:center}.card-image-pattern{position:absolute;inset:0;padding:20px}.card-badge{position:absolute;top:14px;left:14px;padding:5px 12px;border-radius:6px;font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;z-index:2}.card-body{padding:20px}.card-title{font-family:Space Grotesk,sans-serif;font-size:1.2rem;font-weight:600;color:var(--gray-900);margin-bottom:6px}.card-description{font-size:.88rem;color:var(--gray-500);line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.card-footer{justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--gray-100)}.card-footer,.card-instructor{display:flex;align-items:center}.card-instructor{gap:6px;font-size:.82rem;color:var(--gray-500)}.card-instructor svg{flex-shrink:0;opacity:.6}.card-link{display:flex;align-items:center;gap:4px;font-size:.88rem;font-weight:600;color:var(--blue-600);text-decoration:none;transition:all var(--transition)}.card-link:hover{color:var(--blue-700);gap:8px}.cert-banner{max-width:1200px;margin:0 auto 60px;padding:0 24px}.cert-inner{background:linear-gradient(135deg,var(--blue-50),#eef2ff);border:1px solid var(--blue-100);border-radius:var(--radius);padding:28px 32px;justify-content:space-between;gap:24px}.cert-inner,.cert-left{display:flex;align-items:center}.cert-left{gap:18px}.cert-icon{width:56px;height:56px;border-radius:14px;background:var(--white);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);flex-shrink:0}.cert-text h3{font-family:Space Grotesk,sans-serif;font-weight:600;font-size:1.05rem;color:var(--gray-900);margin-bottom:2px}.cert-text p{font-size:.88rem;color:var(--gray-500)}.cert-btn{padding:10px 24px;border-radius:10px;border:1.5px solid var(--blue-600);background:var(--white);color:var(--blue-600);font-family:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:all var(--transition);white-space:nowrap}.cert-btn:hover{background:var(--blue-600);color:#fff}.empty-state{display:none;grid-column:1/-1;text-align:center;padding:80px 20px}.empty-state.visible{display:block}.empty-state svg{margin:0 auto 16px;opacity:.3}.empty-state h3{font-size:1.1rem;color:var(--gray-600);margin-bottom:4px}.empty-state p{font-size:.9rem;color:var(--gray-400)}.skeleton-card{pointer-events:none}.skeleton-image{background:var(--gray-200);position:relative;overflow:hidden}.skeleton-shimmer{position:absolute;inset:0;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.4),transparent);animation:shimmer 1.5s infinite}.skeleton-line{height:14px;background:var(--gray-200);border-radius:6px;margin-bottom:8px;position:relative;overflow:hidden}.skeleton-line:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.5),transparent);animation:shimmer 1.5s infinite}.skeleton-title{width:60%;height:18px}.skeleton-desc{width:90%}.skeleton-desc.short{width:50%}.skeleton-small{width:80px;height:12px}.skeleton-link{width:100px;height:12px}@media (max-width:768px){.page-header h1{font-size:1.75rem}.course-grid{grid-template-columns:1fr}.cert-inner{text-align:center}.cert-inner,.cert-left{flex-direction:column}.filters-bar{flex-wrap:wrap}.search-box{max-width:100%}.header-logo{font-size:1rem}.nav-link{padding:6px 12px;font-size:.82rem}}@media (max-width:480px){.filter-group{display:none}}