:root {
  --primary: #f59e0b;
}

body {
  font-family: 'Noto Sans SC', sans-serif;
  scroll-behavior: smooth;
}

.font-serif {
  font-family: 'Playfair Display', serif;
}

.glass {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
}

.nav-link {
    position: relative;
    padding-bottom: 2px;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.filter-btn.active {
    background: var(--primary);
    color: black;
    border-color: var(--primary);
}

.animate-slide-up {
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.animate-fade-in {
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.scrollbar-hide::-webkit-scrollbar {
    display: none;
}

.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.poster-card {
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.poster-card:hover {
    transform: translateY(-10px);
}

.poster-card:hover img {
    transform: scale(1.05);
}

.poster-card img {
    transition: transform 0.8s ease;
}

header.scrolled {
    background: rgba(5, 5, 5, 0.85);
    backdrop-filter: blur(15px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}