/* Kompaktnější gradientní pozadí s podporou dark modu */
.academy-header { 
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%); 
    border-bottom: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.academy-header::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/patterns/carbon-fibre.png');
    opacity: 0.12;
    pointer-events: none;
}
.dark .academy-header {
    background: linear-gradient(135deg, #020617 0%, #0f172a 100%);
    border-bottom: 1px solid #1e293b;
}
.card-hover:hover .card-img { transform: scale(1.08); }
.card-img { transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1); }
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* Aktivní tlačítko kategorie */
.cat-btn.active { background: #2563eb !important; color: white !important; border-color: #2563eb !important; }