.materials-hero {
    padding-bottom: 2rem;
}

.materials-section {
    padding: 3rem 0 5rem;
}

.materials-status {
    text-align: center;
    color: #64748b;
    padding: 3rem 0;
    font-size: 1.05rem;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.75rem;
}

.material-card {
    display: block;
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.material-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.material-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: #0f172a;
    overflow: hidden;
}

.material-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.material-play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
    background: rgba(15, 23, 42, 0.25);
}

.material-play i {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    color: #1e293b;
    display: flex;
    align-items: center;
    justify-content: center;
}

.material-info {
    padding: 1.1rem 1.25rem 1.4rem;
}

.material-info h3 {
    margin: 0 0 0.4rem;
    font-size: 1.1rem;
    color: #1e293b;
}

.material-info p {
    margin: 0 0 0.6rem;
    font-size: 0.92rem;
    color: #64748b;
    line-height: 1.4;
}

.material-slide-count {
    font-size: 0.8rem;
    color: #94a3b8;
}