.item-header {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.item-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

@media (max-width: 968px) {
    .item-grid {
        grid-template-columns: 1fr;
    }
}

.item-image {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 12px;
    background: #e5e7eb;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.item-main-video {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 12px;
    background: #000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.item-media-gallery {
    margin-top: 0.8rem;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
}

@media (max-width: 768px) {
    .item-media-gallery {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.item-media-thumb {
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
    cursor: pointer;
    padding: 0;
}

.item-media-thumb.active {
    border-color: #3b82f6;
}

.item-media-thumb img,
.item-media-thumb video {
    width: 100%;
    height: 72px;
    object-fit: cover;
    display: block;
    background: #111827;
}

.item-media-badge {
    display: inline-block;
    width: 100%;
    text-align: center;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 0;
    background: #eff6ff;
    color: #1d4ed8;
}

.item-description-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.item-price-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 2rem;
}

.item-main-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3b82f6;
    line-height: 1.1;
}

.item-price-detail-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 0.9rem 1rem;
    border-radius: 8px;
    margin-top: 0.9rem;
    font-size: 0.92rem;
    color: #334155;
}

.item-section-divider {
    border-top: 1px solid #e5e7eb;
    padding-top: 1rem;
    margin-top: 1rem;
}

.item-form-group {
    margin-bottom: 1rem;
}

.item-form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-size: 0.92rem;
    color: #1f2937;
}

.item-form-group input,
.item-form-group select,
.item-form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
}

.item-form-group input:focus,
.item-form-group select:focus,
.item-form-group textarea:focus {
    outline: none;
    border-color: #3b82f6;
}

.item-flow-box {
    margin-top: 12px;
    padding: 10px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    background: #f9fafb;
}