.frames {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 40px 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      
    }

    .container {
      max-width: 1200px;
      width: 100%;
      margin: 0 auto;
      display: flex;
      gap: 40px;
      background: white;
      padding: 40px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }

    .gallery {
      width: 50%;
     
    }

    .main-img {
      width: 100%;
      height: 500px;
      object-fit: cover;
      border: 1px solid #ccc;
    }

    .thumbnails {
      display: flex;
      gap: 10px;
      margin-top: 10px;
    }

    .thumbnails img {
      width: 80px;
      height: 80px;
      object-fit: cover;
      cursor: pointer;
      border: 2px solid transparent;
    }

    .thumbnails img.active {
      border-color: black;
    }

    .details {
      width: 50%;
    }

    .price {
      font-size: 24px;
      color: #e53935;
      margin: 10px 0;
    }

    .options {
      margin: 20px 0;
    }

    .options h4 {
      margin-bottom: 5px;
    }

    .btn-group {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .btn-group button {
      padding: 10px 20px;
      border: 1px solid #ccc;
      background: white;
      cursor: pointer;
    }

    .btn-group button.active {
      border-color: black;
      font-weight: bold;
    }

    .quantity {
      display: flex;
      align-items: center;
      gap: 10px;
      margin: 20px 0;
      flex-direction: row; /* Đảm bảo xếp ngang */
      justify-content: left; /* Căn giữa toàn bộ khối */
    }

    .quantity button {
      padding: 5px 10px;
      font-size: 18px;
      cursor: pointer;
    }

    .actions {
      display: flex;
      gap: 20px;
    }

    .actions button {
      padding: 15px 30px;
      font-size: 16px;
      cursor: pointer;
      border: none;
    }

    .add-cart {
      background: white;
      border: 2px solid black;
    }

    .buy-now {
      background: black;
      color: white;
    }

    .tabs {
      width: 1200px;
      margin: 40px auto;
      background: white;
      padding: 40px;
      box-shadow: 0 0 10px rgba(0,0,0,0.05);
    }

    .tab-buttons {
      display: flex;
      border-bottom: 1px solid #ddd;
    }

    .tab-buttons button {
      flex: 1;
      padding: 15px;
      background: white;
      border: none;
      cursor: pointer;
      font-weight: bold;
    }

    .tab-buttons button.active {
      border-bottom: 3px solid black;
    }

    .tab-content {
    padding: 20px;
    min-height: 150px; /* giữ chiều cao tối thiểu để khung không co */
    display: none;
    width: 100%; /* giữ chiều ngang cố định */
    box-sizing: border-box;
    }

    .tab-content.active {
      display: block;
    }
    .review-section {
    width: 1200px;
    margin: 40px auto;
    background: #fff;
    padding: 40px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    }

    .review-section h2 {
    margin-bottom: 20px;
    font-size: 24px;
    color: #333;
    }

    .review-form label {
    display: block;
    margin-top: 20px;
    font-weight: bold;
    color: #555;
    }

    .review-form input,
    .review-form select,
    .review-form textarea {
    width: 100%;
    padding: 10px;
    margin-top: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    }

    .review-form button {
    margin-top: 30px;
    padding: 12px 24px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    }

    .review-form button:hover {
    background-color: #0056b3;
    }
    .review-item {
    margin-top: 20px;
    padding: 10px;
    background: #f9f9f9;
    border-radius: 6px;
    }