* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: "Helvetica Neue", sans-serif;
      color: #111;
    }

    .main-container {
      display: flex;
      height: 100vh;
      overflow: hidden;
    }

    .left-half {
      width: 50%;
      height: 100%;
      overflow-y: auto;
      background-color: #eee;
    }


    .right-half {
      width: 50%;
      padding: 50px;
      overflow-y: auto;
      background-color: #fff;
    }

    h1 {
      font-size: 36px;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .desc {
      font-size: 16px;
      line-height: 1.7;
      margin-bottom: 30px;
    }

    .section {
      margin-bottom: 30px;
      padding-bottom: 20px;
      border-bottom: 1px solid #ccc;
    }

    .section h2 {
      font-size: 14px;
      text-transform: uppercase;
      margin-bottom: 10px;
      font-weight: normal;
    }

    .dimensions ul, .colors ul {
      list-style: none;
      padding: 0;
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
    }

    .dimensions ul li {
      font-size: 14px;
    }

    .colors li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
    }

    .color-circle {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      border: 1px solid #aaa;
    }

    .white { background: #fdfdfd; }
    .ivory { background: #f6f1e7; }
    .sand { background: #d9c9a9; }
    .grey { background: #b6b6b6; }
    .black { background: #222; }

    .price {
      font-size: 24px;
      font-weight: bold;
      margin-bottom: 10px;
    }

    .custom-note {
      font-size: 13px;
      color: #666;
      margin-top: 5px;
    }

    /* You may also like section */
    .related-section {
      width: 100%;
      border-top: 1px solid #ccc;
      padding: 40px 20px;
      background: #f8f8f8;
    }

    .related-section h2 {
      font-size: 18px;
      font-weight: bold;
      text-transform: uppercase;
      margin-bottom: 30px;
      padding-left: 50px;
    }

    .related-products {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
      padding: 0 30px;
    }

    .product-card {
      flex: 1 1 20%;
      max-width: 300px;
    }

    .product-card img {
      width: 100%;
      display: block;
    }

    .product-info {
      padding: 10px;
      background: white;
      border: 1px solid #000;
      border-top: none;
    }

    .product-info div:first-child {
      font-size: 14px;
    }

    .product-info div:last-child {
      font-size: 13px;
      color: #333;
    }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  font-family: Arial, sans-serif;
  background-color: white;
  border-bottom: 1px solid #eee;
}

.logo {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 1px;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  color: black;
  font-size: 14px;
  text-transform: uppercase;
}

.main-nav a:hover {
  text-decoration: underline;
}

.lang {
  font-weight: 600;
  font-size: 12px;
}
#add-to-cart-btn {
  margin-top: 20px;
  padding: 12px 20px;
  background-color: #222;
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: background-color 0.3s ease;
}

#add-to-cart-btn:hover {
  background-color: #444;
}

.material-square {
  display: inline-block;
  width: 50px;
  height: 50px;
  border: none;
  transition: transform 0.2s ease;
}



  .related-section {
  padding: 40px 20px;
  text-align: center;
}

.related-section h2 {
  font-size: 28px;
  margin-bottom: 30px;
}

.product-image-placeholder {
  width: 100%;
  height: 700px;
  margin: 0 auto;
  background-color: #f0f0f0;
  border: 2px dashed #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 20px;
}


.material-list {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.material-list .option{
  padding: 0 !important;
  border: none;
  cursor: pointer;
}

.material-list .option.selected {
  background-color: #f0f0f0;
}
.option:hover .material-square {
  transform: scale(3);
}

.option {
  cursor: pointer;
  padding: 6px;
  border: 1px solid #ccc;
  border-radius: 6px;
  margin: 5px;
  display: inline-block;
}

.option.selected {
  border: 3px solid green;
  background-color: #f0f0f0;
}
.option .selected {
  border-color: #000;
  background-color: #f0f0f0;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  padding: 40px;
}

.product-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.12);
}

.image-wrapper {
  position: relative;
  overflow: hidden;
}

.image-wrapper img {
  width: 100%;
  height: auto;
  transition: transform 0.4s ease;
}

.product-card:hover .image-wrapper img {
  transform: scale(1.05);
}

.overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-card:hover .overlay {
  opacity: 1;
}

.card-content {
  padding: 18px 20px;
  text-align: center;
}

.product-name {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.product-price {
  font-size: 14px;
  color: #666;
}


/*image slider */
.detail-image-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.slide {
  display: none ;
  width: 100%;
  height: auto; /* Dôležité */
}

.slide.active {
  display: block;
}

.prev, .next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: rgba(0,0,0,0.5);
  color: white;
  border: none;
  padding: 10px;
  cursor: pointer;
  z-index: 1;
}

.prev {
  left: 10px;
}

.next {
  right: 10px;
}