/* --- BỐ CỤC 2 CỘT --- */
.product-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr; /* Ảnh rộng hơn thông tin */
  gap: 60px;
  align-items: start;
}

/* --- CỘT ẢNH --- */
.product-gallery-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.main-image-container {
  position: relative;
  width: 100%;
  border-radius: 4px;
  overflow: hidden;
  background-color: #f9f9f9;
}

.main-image-container img {
  width: 100%;
  height: auto;
  display: block;
}

.badge-detail {
  position: absolute;
  top: 15px; right: 15px;
  background: #fff;
  color: #8b1e14;
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* Thumbnails */
.thumbnail-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}

.thumb-item {
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
}

.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 2px;
}

.thumb-item.active {
  border-color: #8b1e14;
  opacity: 0.7;
}

/* --- CỘT THÔNG TIN --- */
.product-info-side {
  position: sticky;
  top: 120px; /* Dính khi cuộn trang */
}

.product-title-large {
  font-family: "Playfair Display", serif;
  font-size: 32px;
  font-weight: 400;
  color: #8b1e14;
  margin-bottom: 10px;
  line-height: 1.2;
}

.product-price-large {
  font-family: "Playfair Display", serif;
  font-size: 24px;
  color: #555;
  margin-bottom: 30px;
}

/* Chọn số lượng */
.quantity-selector {
  display: inline-flex;
  border: 1px solid #ddd;
  margin-bottom: 20px;
  height: 44px;
}

.quantity-selector button {
  width: 40px;
  background: #fff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  color: #8b1e14;
}

.quantity-selector input {
  width: 50px;
  text-align: center;
  border: none;
  border-left: 1px solid #eee;
  border-right: 1px solid #eee;
  font-family: "Playfair Display", serif;
  font-size: 16px;
  color: #333;
}

/* Nút Mua Hàng Lớn */
.btn-add-cart-large {
  width: 100%;
  background-color: #fff;
  color: #8b1e14;
  border: 1px solid #8b1e14;
  padding: 15px;
  font-family: "Playfair Display", serif;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: center;
  gap: 10px;
  transition: all 0.3s;
  margin-bottom: 40px;
}

.btn-add-cart-large:hover {
  background-color: #8b1e14;
  color: #fff;
}

.btn-add-cart-large .btn-price {
  opacity: 0.7;
  font-weight: 400;
}

/* --- ACCORDION (Mô tả) --- */
.accordion-item {
  border-top: 1px solid #eee;
}
.accordion-item:last-child {
  border-bottom: 1px solid #eee;
}

.accordion-header {
  padding: 15px 0;
  cursor: pointer;
  font-family: "Playfair Display", serif;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #333;
}

.accordion-body {
  display: none; /* Ẩn mặc định */
  padding-bottom: 20px;
  font-size: 14px;
  line-height: 1.6;
  color: #555;
}

.accordion-item.open .accordion-body {
  display: block; /* Hiện khi có class open */
}

.accordion-item.open .accordion-header i {
  transform: rotate(180deg);
}

/* Responsive Mobile */
@media (max-width: 768px) {
  .product-layout {
    grid-template-columns: 1fr; /* 1 cột trên mobile */
    gap: 30px;
  }
  .product-info-side {
    position: static; /* Bỏ dính trên mobile */
  }
}