:root {
    --gutter: clamp(0.5rem, 2vw, 1rem);
    --radius: 0.375rem;          /* ≈6px */
    --transition: 0.3s ease;
    --border-color: orange;
    --text-dark: #333;
    --text-mid: #555;
    --bg-section: #fff;
  }
  
  /* Reset */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  /* Section wrapper with fade-in */
  .product-extra-info-section {
    border: 2px solid var(--border-color);
    background-color: var(--bg-section);
    border-radius: var(--radius);
    padding: var(--gutter);
    margin: var(--gutter) 0;
    position: relative;
    opacity: 0;
    transform: translateY(var(--gutter));
    animation: fadeInTabs 0.6s forwards;
  }
  
  /* Fade-in keyframes */
  @keyframes fadeInTabs {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Tabs nav (desktop) */
  .tabs-nav {
    display: flex;
    list-style: none;
    border-bottom: 1px solid #ccc;
    margin-bottom: var(--gutter);
  }
  .tabs-nav li {
    padding: clamp(0.5rem, 1.5vw, 1rem) clamp(1rem, 3vw, 1.5rem);
    margin-right: 0.5rem;
    cursor: pointer;
    font-family: Poppins, sans-serif;
    color: var(--text-dark);
    border-radius: var(--radius) var(--radius) 0 0;
    transition: background var(--transition), color var(--transition);
  }
  .tabs-nav li:hover,
  .tabs-nav li.active {
    background-color: var(--border-color);
    color: #fff;
  }
  .tabs-nav li i {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-right: 0.25rem;
  }
  
  /* Tabs dropdown (mobile) */
  .tabs-dropdown {
    display: none;
    margin-bottom: var(--gutter);
  }
  .tabs-dropdown select {
    width: 100%;
    padding: clamp(0.5rem, 1.5vw, 0.75rem);
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    font-family: Poppins, sans-serif;
  }
  
  /* Tab content */
  .tab-content {
    display: none;
    animation: fadeContent 0.5s ease;
  }
  .tab-content.active {
    display: block;
  }
  
  /* Fade-content */
  @keyframes fadeContent {
    from { opacity: 0; }
    to   { opacity: 1; }
  }
  
  /* Reviews container */
  .reviews-container {
    overflow: hidden;
    transition: max-height 0.5s ease;
    margin-bottom: var(--gutter);
  }
  .reviews-container.expanded {
    max-height: none;
    overflow: visible;
  }
  
  /* Individual review */
  .review-item {
    padding-bottom: var(--gutter);
    margin-bottom: var(--gutter);
    border-bottom: 1px dashed #ddd;
  }
  .review-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
  }
  .review-header .stars i {
    color: #ffc107;
    margin-right: 0.25rem;
  }
  .verified-purchase {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: green;
    font-size: clamp(0.875rem, 1.5vw, 1rem);
  }
  .verified-purchase i {
    color: green;
  }
  .review-body {
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    color: var(--text-mid);
  }
  
  /* Category & FAQ question sections */
  .category-section,
  .faq-question {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    color: var(--text-mid);
  }
  .category-section .see-more-cat,
  .see-more-btn {
    background-color: var(--border-color);
    color: #fff;
    padding: clamp(0.5rem, 1.5vw, 0.75rem) clamp(1rem, 3vw, 1.25rem);
    font-family: Poppins, sans-serif;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
    width: fit-content;
  }
  .category-section .see-more-cat:hover,
  .see-more-btn:hover {
    background-color: #e69500;
  }
  
  /* Description & additional info */
  .description-section p {
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    line-height: 1.6;
    color: var(--text-mid);
  }
  .additional-info-section ul {
    list-style: disc;
    padding-left: 1.25rem;
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    color: var(--text-mid);
  }
  
  /* FAQs */
  .faqs-section .faq-item {
    margin-bottom: var(--gutter);
    border: 1px solid #ddd;
    border-radius: var(--radius);
    overflow: hidden;
  }
  .faq-question {
    background-color: #f8f8f8;
    padding: clamp(0.5rem, 1.5vw, 0.75rem) clamp(1rem, 3vw, 1.25rem);
    display: flex;
    align-items: center;
    transition: background var(--transition);
    cursor: pointer;
  }
  .faq-question:hover {
    background-color: #ececec;
  }
  .faq-arrow {
    margin-left: auto;
    transition: transform var(--transition);
  }
  .faq-arrow.rotate {
    transform: rotate(90deg);
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background-color: #fff;
    padding: 0 clamp(1rem, 3vw, 1.25rem);
  }
  .faq-answer.open {
    padding: clamp(0.5rem, 1.5vw, 1rem) clamp(1rem, 3vw, 1.25rem);
  }
  
  /* No reviews fallback */
  .no-reviews-message {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-mid);
    padding: var(--gutter);
    text-align: center;
    border: 1px dashed #ddd;
    border-radius: var(--radius);
    margin-top: var(--gutter);
  }
  
  /* Review images */
  .review-images {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: var(--gutter) 0;
  }
  .review-image-thumbnail {
    width: clamp(2.5rem, 6vw, 3rem);
    height: clamp(2.5rem, 6vw, 3rem);
    object-fit: cover;
    border-radius: var(--radius);
    cursor: pointer;
    transition: transform var(--transition);
  }
  .review-image-thumbnail:hover {
    transform: scale(1.05);
  }
  
  /* Tabs ↔ Dropdown switch on mobile */
  @media (max-width: 768px) {
    .tabs-nav { display: none; }
    .tabs-dropdown { display: block; }
  }