.woocommerce div.product {
  display: grid;
  gap: 24px;
}

.woocommerce div.product .product_title {
  font-size: 34px;
  line-height: 1.15;
  color: var(--text);
}

.woocommerce div.product p.price,
.woocommerce div.product span.price {
  color: var(--brand);
  font-weight: 800;
}

.woocommerce div.product .woocommerce-product-gallery img {
  border-radius: 18px;
}

.woocommerce div.product form.cart .button,
.woocommerce a.button,
.woocommerce button.button,
.woocommerce input.button {
  background: var(--brand);
  color: #fff;
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 700;
  border: 0;
}

.woocommerce div.product form.cart .button:hover,
.woocommerce a.button:hover,
.woocommerce button.button:hover,
.woocommerce input.button:hover {
  background: var(--brand-dark);
  color: #fff;
}

/* =========================
   SINGLE PRODUCT WRAPPER
========================= */
.single-product-page {
  padding: 28px 0 48px;
}

.single-product-shell {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
}

/* =========================
   CONTENT SINGLE PRODUCT
========================= */
.bttk-single-product {
  display: block;
}

.bttk-single-product__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

.bttk-single-product__gallery,
.bttk-single-product__summary {
  min-width: 0;
}

.bttk-single-product__gallery .woocommerce-product-gallery,
.bttk-single-product__gallery div.images {
  float: none !important;
  width: 100% !important;
  max-width: 100% !important;
  margin-bottom: 0 !important;
}

.bttk-single-product__gallery .woocommerce-product-gallery__wrapper {
  overflow: hidden;
  border-radius: 22px;
}

.bttk-single-product__gallery .flex-viewport {
  height: auto !important;
  border-radius: 22px;
  overflow: hidden;
}

.bttk-single-product__gallery .woocommerce-product-gallery__image {
  background: #fff;
  border-radius: 22px;
  overflow: hidden;
}

.bttk-single-product__gallery .woocommerce-product-gallery__image a {
  display: block;
  width: 100%;
  background: #fff;
}

.bttk-single-product__gallery .woocommerce-product-gallery__image img {
  display: block;
  width: 100%;
  height: auto !important;
  max-height: none !important;
  object-fit: contain;
}

.bttk-single-product__gallery .flex-control-thumbs {
  display: flex !important;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px !important;
  padding: 0 !important;
}

.bttk-single-product__gallery .flex-control-thumbs li {
  float: none !important;
  flex: 0 0 112px;
  width: 112px !important;
  margin: 0 !important;
  list-style: none;
}

.bttk-single-product__gallery .flex-control-thumbs img {
  width: 112px;
  height: 112px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  padding: 4px;
  opacity: 1;
  object-fit: contain;
}

@media (min-width: 992px) {
  .bttk-single-product__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

.bttk-single-product__breadcrumb {
  margin-bottom: 12px;
}

.bttk-single-product__breadcrumb .woocommerce-breadcrumb {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.bttk-single-product__breadcrumb .woocommerce-breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.bttk-single-product__breadcrumb .woocommerce-breadcrumb a:hover {
  color: var(--brand);
}

.bttk-single-product__title {
  margin: 0 0 14px !important;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.12;
  color: var(--text);
}

.bttk-single-product__price {
  margin-bottom: 16px;
}

.bttk-single-product__price .price,
.bttk-single-product__price p.price,
.bttk-single-product__price span.price {
  margin: 0 !important;
  color: var(--accent) !important;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
}

.bttk-single-product__meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin: 10px 0 18px;
}

.bttk-single-product__sku {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: #f8fafc;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
}

.bttk-single-product__meta-label {
  color: var(--muted);
  font-weight: 600;
}

.bttk-single-product__sku strong {
  color: var(--brand);
  font-weight: 800;
}

.bttk-single-product__stock .stock {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
}

.bttk-single-product__stock .in-stock {
  color: #a16207;
}

.bttk-single-product__stock .out-of-stock {
  color: #b91c1c;
}

.bttk-single-product__short-description {
  margin-bottom: 18px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 15px;
}

.bttk-single-product__short-description p:last-child {
  margin-bottom: 0;
}

.bttk-single-product__cart {
  margin-bottom: 18px;
}

.bttk-single-product__cart form.cart {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 0 !important;
}

.bttk-single-product__cart form.cart .variations {
  width: 100%;
  margin-bottom: 14px;
  border: 0;
}

.bttk-single-product__cart form.cart .variations td,
.bttk-single-product__cart form.cart .variations th {
  padding: 8px 0;
}

.bttk-single-product__cart form.cart select,
.bttk-single-product__cart form.cart .qty {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 12px;
  background: #fff;
  color: var(--text);
}

.bttk-single-product__cart form.cart .single_add_to_cart_button,
.bttk-single-product__cart form.cart .button {
  min-height: 46px;
  padding: 0 18px !important;
  border-radius: 12px !important;
  background: var(--brand) !important;
  color: #fff !important;
  font-weight: 800 !important;
  border: 0 !important;
  box-shadow: none !important;
}

.bttk-single-product__cart form.cart .single_add_to_cart_button:hover,
.bttk-single-product__cart form.cart .button:hover {
  background: var(--brand-dark) !important;
  color: #fff !important;
}

.bttk-single-product__cart .woocommerce-variation-price {
  margin-bottom: 12px;
}

.bttk-single-product__cart .woocommerce-variation-description {
  margin-bottom: 10px;
  color: var(--muted);
}

.bttk-single-product__meta {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.bttk-single-product__meta .product_meta {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.bttk-single-product__meta .product_meta a {
  color: var(--brand);
  text-decoration: none;
}

.bttk-single-product__meta .product_meta a:hover {
  color: var(--brand-dark);
}

.bttk-single-product__meta .sku_wrapper {
  display: none;
}

.bttk-single-product__bottom {
  margin-top: 30px;
}

.bttk-single-product .woocommerce-tabs {
  margin-top: 0;
}

.bttk-single-product .woocommerce-tabs ul.tabs {
  margin: 0 0 18px !important;
  padding: 0 !important;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  border-bottom: 0 !important;
}

.bttk-single-product .woocommerce-tabs ul.tabs::before,
.bttk-single-product .woocommerce-tabs ul.tabs::after {
  display: none !important;
}

.bttk-single-product .woocommerce-tabs ul.tabs li {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
  border-radius: 0 !important;
}

.bttk-single-product .woocommerce-tabs ul.tabs li::before,
.bttk-single-product .woocommerce-tabs ul.tabs li::after {
  display: none !important;
}

.bttk-single-product .woocommerce-tabs ul.tabs li a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px !important;
  border-radius: 12px;
  background: #f8fafc;
  border: 1px solid var(--line);
  color: var(--text) !important;
  text-decoration: none;
  font-weight: 700;
}

.bttk-single-product .woocommerce-tabs ul.tabs li.active a,
.bttk-single-product .woocommerce-tabs ul.tabs li a:hover {
  background: rgba(15, 76, 129, 0.08);
  border-color: #bfd5ea;
  color: var(--brand) !important;
}

.bttk-single-product .woocommerce-Tabs-panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.bttk-single-product .related,
.bttk-single-product .upsells {
  margin-top: 34px;
}

.bttk-single-product .related > h2,
.bttk-single-product .upsells > h2 {
  margin: 0 0 18px;
  font-size: 26px;
  color: var(--text);
}


/* =========================
   DESCRIPTION TAB COLLAPSE
========================= */
.bttk-tab-desc-content {
  position: relative;
  color: var(--text);
  line-height: 1.75;
}

.bttk-tab-desc-content.is-collapsed {
  max-height: 420px;
  overflow: hidden;
}

.bttk-tab-desc-content.is-collapsed::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 86px;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), #fff 82%);
}

.bttk-tab-desc-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  margin-top: 16px;
  padding: 0 16px;
  border: 1px solid #bfd5ea;
  border-radius: 999px;
  background: #fff;
  color: var(--brand);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: none;
}

.bttk-tab-desc-toggle:hover {
  background: rgba(15, 76, 129, 0.06);
  color: var(--brand-dark);
}

.bttk-single-product .woocommerce-Tabs-panel--description table,
.bttk-single-product #tab-description table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  table-layout: auto;
}

.bttk-single-product .woocommerce-Tabs-panel--description table th,
.bttk-single-product .woocommerce-Tabs-panel--description table td,
.bttk-single-product #tab-description table th,
.bttk-single-product #tab-description table td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
}

.bttk-single-product .woocommerce-Tabs-panel--description,
.bttk-single-product #tab-description {
  overflow-x: auto;
}

/* SKU biến thể - nằm trước giá biến thể */
.bttk-variation-sku {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
  margin: 0 0 12px;
  border-radius: 999px;
  background: #f8fafc;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
}

.bttk-variation-sku__label {
  color: var(--muted);
  font-weight: 600;
}

.bttk-variation-sku__value {
  color: var(--brand);
  font-weight: 800;
}

/* giá + tồn kho của biến thể cùng 1 hàng */
.single_variation_wrap .woocommerce-variation {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.single_variation_wrap .woocommerce-variation-price,
.single_variation_wrap .woocommerce-variation-availability {
  margin: 0 !important;
}

.single_variation_wrap .woocommerce-variation-price .price,
.single_variation_wrap .woocommerce-variation-price .woocommerce-Price-amount,
.single_variation_wrap .woocommerce-variation-price p.price,
.single_variation_wrap .woocommerce-variation-price span.price {
  margin: 0 !important;
  color: var(--accent) !important;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
}

.single_variation_wrap .woocommerce-variation-availability .stock {
  margin: 0 !important;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.single_variation_wrap .woocommerce-variation-availability .in-stock {
  color: #a16207;
}

.single_variation_wrap .woocommerce-variation-availability .out-of-stock {
  color: #b91c1c;
}

@media (max-width: 991px) {
  .bttk-single-product__top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 767px) {
  .single-product-page {
    padding: 20px 0 40px;
  }

  .single-product-shell {
    padding: 20px;
    border-radius: 18px;
  }

  .bttk-single-product__title {
    font-size: 30px;
  }

  .bttk-single-product__price .price,
  .bttk-single-product__price p.price,
  .bttk-single-product__price span.price,
  .single_variation_wrap .woocommerce-variation-price .price,
  .single_variation_wrap .woocommerce-variation-price .woocommerce-Price-amount,
  .single_variation_wrap .woocommerce-variation-price p.price,
  .single_variation_wrap .woocommerce-variation-price span.price {
    font-size: 22px;
  }

  .bttk-single-product .woocommerce-Tabs-panel {
    padding: 16px;
  }

  .bttk-single-product__gallery .woocommerce-product-gallery__image a {
    min-height: 0;
    aspect-ratio: auto;
  }

  .bttk-single-product__gallery .flex-control-thumbs {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    gap: 10px;
    padding: 2px 2px 8px !important;
    margin-top: 10px !important;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .bttk-single-product__gallery .flex-control-thumbs li {
    flex: 0 0 86px;
    width: 86px !important;
  }

  .bttk-single-product__gallery .flex-control-thumbs img {
    width: 86px;
    height: 86px;
    padding: 4px;
    border-radius: 12px;
  }

}

@media (max-width: 640px) {
  .woocommerce div.product .product_title {
    font-size: 30px;
  }

  .single_variation_wrap .woocommerce-variation {
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 640px) {
  .bttk-single-product__gallery .flex-control-thumbs li {
    flex-basis: 76px;
    width: 76px !important;
  }

  .bttk-single-product__gallery .flex-control-thumbs img {
    width: 76px;
    height: 76px;
    border-radius: 11px;
  }
}


@media (max-width: 767px) {
  .bttk-tab-desc-content.is-collapsed {
    max-height: 320px;
  }

  .bttk-tab-desc-content.is-collapsed::after {
    height: 72px;
  }
}


/* =========================
   DESCRIPTION TAB COLLAPSE - ROBUST VERSION
   Dùng cho JS product-description-toggle.js
========================= */

.bttk-single-product .woocommerce-Tabs-panel--description.bttk-desc-panel-ready,
.bttk-single-product #tab-description.bttk-desc-panel-ready {
  position: relative;
}

.bttk-desc-toggle-wrap {
  display: flex;
  justify-content: center;
  margin: 14px 0 0;
}

.bttk-desc-toggle-btn,
.bttk-tab-desc-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid #bfd5ea;
  border-radius: 999px;
  background: #fff;
  color: var(--brand);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.bttk-desc-toggle-btn:hover,
.bttk-tab-desc-toggle:hover {
  background: rgba(15, 76, 129, 0.06);
  color: var(--brand-dark);
}

.bttk-tab-desc-content {
  position: relative;
  color: var(--text);
  line-height: 1.75;
  overflow: visible;
  transition: max-height 0.25s ease;
}

.bttk-tab-desc-content.is-collapsed {
  max-height: 420px;
  overflow: hidden;
}

.bttk-tab-desc-content.is-collapsed::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 86px;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), #fff 82%);
}

@media (max-width: 767px) {
  .bttk-tab-desc-content.is-collapsed {
    max-height: 320px;
  }

  .bttk-tab-desc-content.is-collapsed::after {
    height: 72px;
  }
}