:root {
    --primary-color: #0073e6;
    --danger-color: #d63638;
    --secondary-color: #6c757d;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --body-bg: #f1f1f1;
}

body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; margin: 0; background-color: var(--body-bg); color: var(--dark-color); line-height: 1.6; }
.container { max-width: 1400px; margin: 0 auto; padding: 20px; }
header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; background: var(--card-bg); padding: 15px 20px; border-radius: 5px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
header h1 { margin: 0; font-size: 24px; }
.header-actions { display: flex; gap: 15px; }

.btn { display: inline-block; padding: 8px 16px; border-radius: 5px; text-decoration: none; color: white; border: none; cursor: pointer; font-size: 14px; transition: background-color 0.2s ease; }
.btn-primary { background-color: var(--primary-color); }
.btn-danger { background-color: var(--danger-color); }
.btn-secondary { background-color: var(--secondary-color); color: white; }
.btn-full { width: 100%; text-align: center; }

#search-bar, input[type="text"], input[type="number"], select, textarea { width: 100%; padding: 10px; border: 1px solid var(--border-color); border-radius: 4px; font-size: 14px; box-sizing: border-box; }
#search-bar { width: 250px; }

/* Table */
#product-table { width: 100%; border-collapse: collapse; background-color: var(--card-bg); box-shadow: 0 1px 3px rgba(0,0,0,0.1); table-layout: fixed; }
#product-table th, #product-table td { padding: 12px 15px; border-bottom: 1px solid var(--border-color); text-align: left; vertical-align: middle; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#product-table th { background-color: var(--light-color); font-weight: 600; }
#product-table tr:hover { background-color: #f5f5f5; }
.col-img { width: 80px; }
.col-sku { width: 15%; }
.col-price { width: 10%; }
.col-stock { width: 12%; }
.col-actions { width: 12%; }
#product-table img, .no-image-placeholder { width: 50px; height: 50px; object-fit: cover; border-radius: 4px; border: 1px solid var(--border-color); display: block; aspect-ratio: 1 / 1; }
.no-image-placeholder { background-color: #f0f0f0; display: flex; align-items: center; justify-content: center; color: #ccc; }
.no-image-placeholder svg { width: 24px; height: 24px; }

/* Form */
.form-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; align-items: flex-start; }
.card { background-color: var(--card-bg); padding: 20px; border-radius: 5px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); margin-bottom: 20px; }
.card h3 { margin-top: 0; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; margin-bottom: 20px; }
.card label { display: block; margin-bottom: 5px; font-weight: 600; }
.card input, .card select, .card textarea { margin-bottom: 15px; }
.dimensions { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.tabs { display: flex; border-bottom: 1px solid var(--border-color); margin: -20px -20px 20px -20px; padding: 0 20px; }
.tab-link { padding: 10px 15px; cursor: pointer; border: none; background: none; border-bottom: 3px solid transparent; margin-bottom: -1px; font-size: 14px; }
.tab-link.active { border-bottom-color: var(--primary-color); font-weight: 600; color: var(--primary-color); }
.tab-content { display: none; }
.tab-content.active { display: block; }
#actions-card button, #actions-card select { margin-bottom: 10px; }

/* Category Checklist */
.category-checklist-container { max-height: 250px; overflow-y: auto; border: 1px solid var(--border-color); padding: 10px; border-radius: 4px; margin-top: 5px; }
.category-checklist-container ul { list-style: none; padding-left: 0; margin: 0; }
.category-checklist-container ul ul { padding-left: 20px; }
.category-checklist-container li { margin-bottom: 5px; }
.category-checklist-container label { font-weight: normal; display: flex; align-items: center; gap: 8px; cursor: pointer; }
.category-checklist-container input[type="checkbox"] { width: auto; margin: 0; }

/* Dynamic Image Inputs */
.image-input-wrapper { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 10px; }
.image-input-wrapper img { width: 40px; height: 40px; object-fit: cover; border-radius: 4px; flex-shrink: 0; background-color: #f0f0f0; }
.image-input-wrapper .input-group { flex-grow: 1; }
.image-input-wrapper input { margin-bottom: 0; }
.image-input-wrapper .btn-danger { padding: 5px 10px; font-size: 12px; }

.hidden { display: none; }
.loader { text-align: center; padding: 50px; font-size: 18px; color: var(--secondary-color); }