/* === Catalog Header === */
.catalog-header {
    padding-top: 120px;
    padding-bottom: 3rem;
    background: var(--bg-light);
}

.catalog-back {
    display: inline-block;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--gold);
    font-size: 0.95rem;
}

.catalog-back:hover {
    color: var(--blue);
}

.catalog-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--blue);
    margin-bottom: 0.5rem;
}

.catalog-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
}

/* === Model Card (Accordion) === */
.model-card {
    background: white;
    border-radius: 16px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    cursor: pointer;
    transition: box-shadow 0.3s;
}

.model-card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.model-card.open {
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.12);
}

.model-header {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    gap: 1.25rem;
}

.model-thumb {
    width: 90px;
    height: 90px;
    object-fit: cover;
    border-radius: 12px;
    flex-shrink: 0;
}

.model-info {
    flex: 1;
}

.model-name {
    font-size: 1.4rem;
    color: var(--blue);
    margin: 0 0 0.25rem;
    font-family: 'Playfair Display', Georgia, serif;
}

.model-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.4;
}

.model-toggle {
    flex-shrink: 0;
    color: var(--gold);
    transition: transform 0.6s ease-in-out;
}

.model-card.open .model-toggle {
    transform: rotate(180deg);
}

/* === Model Details (Expandable) === */
.model-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0, 1, 0, 1), padding 0.2s ease;
    padding: 0 1.5rem;
}

.model-card.open .model-details {
    max-height: 800px;
    padding: 0.5rem 1.5rem 2rem;
    transition: max-height 0.8s ease-in-out, padding 0.6s ease-in-out;
}

/* === Piece Cards (Individual Items) === */
.piece-card {
    background: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    text-align: center;
    transition: transform 0.3s;
    cursor: default;
    height: 100%;
}

.piece-card:hover {
    transform: translateY(-3px);
}

.piece-img {
    height: 180px;
    overflow: hidden;
}

.piece-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.piece-info {
    padding: 1rem;
}

.piece-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--blue);
    margin-bottom: 0.25rem;
    font-family: 'Playfair Display', Georgia, serif;
}

.piece-spec {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.piece-price {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--gold);
    margin: 0;
}

/* === Responsive === */
@media (max-width: 767px) {
    .model-header {
        padding: 0.75rem 1rem;
        gap: 1rem;
    }

    .model-thumb {
        width: 70px;
        height: 70px;
    }

    .model-name {
        font-size: 1.15rem;
    }

    .model-desc {
        font-size: 0.85rem;
    }

    .model-card.open .model-details {
        padding: 0.5rem 1rem 1.5rem;
    }

    .catalog-title {
        font-size: 2rem;
    }

    .piece-img {
        height: 150px;
    }
}