.video-series-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

.video-series-card {
    display: block;
    background: var(--color-bg-card, white);
    border-radius: 14px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    font-weight: var(--font-normal);
    border: 1px solid var(--color-border, #e2e8f0);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.video-series-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    border-color: #c4b5fd;
    color: inherit;
    text-decoration: none;
    font-weight: var(--font-normal);
}

.video-series-poster {
    position: relative;
    width: 100%;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    background: var(--color-bg-muted, #f1f5f9);
}

.video-series-poster img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.video-series-poster .play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0);
    transition: background 0.3s ease;
}

.video-series-card:hover .play-overlay {
    background: rgba(0,0,0,0.25);
}

.play-overlay .play-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.video-series-card:hover .play-btn {
    opacity: 1;
    transform: scale(1);
}

.play-btn svg {
    width: 20px;
    height: 20px;
    fill: var(--color-brand-hover, #7c3aed);
    margin-left: 2px;
}

.video-series-info {
    padding: 1rem 1rem 1.25rem;
}

.video-series-info h4 {
    font-size: var(--text-md);
    font-weight: var(--font-semibold);
    color: var(--color-text-heading);
    margin: 0 0 0.4rem 0;
    line-height: var(--leading-tight, 1.4);
}

.video-series-info .series-desc {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin: 0 0 0.6rem 0;
    line-height: var(--leading-normal, 1.5);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-series-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-sm);
    color: var(--color-brand);
    font-weight: var(--font-medium);
}

.video-series-meta svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .video-series-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
    }

    .video-series-info {
        padding: 0.6rem 0.6rem 0.75rem;
    }

    .video-series-info h4 {
        font-size: var(--text-sm);
    }

    .video-series-info .series-desc {
        display: none;
    }

    .video-series-meta {
        font-size: var(--text-xs);
    }
}

@media (max-width: 576px) {
    .video-series-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
}