/**
 * Single Product Page Styles
 *
 * Implements:
 * - Hierarchy & Typography (Montserrat headings, Roboto body, official tokens)
 * - Variation Pills (radiogroup button pills with selected/disabled states)
 * - Primary "Mua ngay" & Secondary "Thêm vào giỏ" CTAs
 * - Restyled Account Upgrade Box & Verified 3-Claim Trust Strip
 * - Product Description with Sticky TOC Column (~70ch prose)
 * - Mobile Sticky Bottom Bar (390px responsive)
 * - Usable Review Form & Clean Meta
 *
 * @package flatsome-child
 */

/* ==========================================================================
   1. Summary & Hierarchy
   ========================================================================== */
.product-main {
  background-color: transparent !important;
}

.product-info h1.product-title {
  font-family: var(--font-heading) !important;
  font-size: var(--fs-2xl) !important;
  font-weight: 800 !important;
  color: var(--c-ink) !important;
  line-height: var(--lh-tight) !important;
  letter-spacing: -0.01em !important;
  text-wrap: balance !important;
  margin-top: 0 !important;
  margin-bottom: var(--sp-3) !important;
}

.product-info .price {
  font-family: var(--font-heading) !important;
  font-size: var(--fs-2xl) !important;
  font-weight: 800 !important;
  color: var(--c-price) !important;
  line-height: 1.2 !important;
  margin-bottom: var(--sp-4) !important;
}

.product-info .price del {
  color: var(--c-price-old) !important;
  font-size: var(--fs-base) !important;
  font-weight: 500 !important;
  margin-right: var(--sp-2) !important;
}

.acc-selected-price-box {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
}

.acc-price-current {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--c-price);
}

.acc-price-old {
  font-size: var(--fs-base);
  color: var(--c-price-old);
  text-decoration: line-through;
  font-weight: 500;
}

.product-info .product-short-description {
  font-size: var(--fs-base);
  color: var(--c-text);
  line-height: var(--lh-body);
  margin-bottom: var(--sp-5);
}

/* ==========================================================================
   2. Variation Picker & Pills
   ========================================================================== */
.variations_form {
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-5);
  background: transparent;
  padding: 0;
  border: none;
  box-shadow: none;
}

.variations_form table.variations {
  width: 100%;
  border-collapse: collapse;
  border: none;
  margin-bottom: var(--sp-2);
}

.variations_form table.variations tr {
  border-bottom: 1px dashed var(--c-line);
}

.variations_form table.variations tr:last-child {
  border-bottom: none;
}

.variations_form table.variations th.label {
  width: 120px;
  min-width: 100px;
  vertical-align: top;
  padding: var(--sp-3) var(--sp-2) var(--sp-3) 0;
  text-align: left;
}

.variations_form table.variations th.label label {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-ink);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0;
  display: block;
  line-height: 1.4;
}

.variations_form table.variations td.value {
  vertical-align: middle;
  padding: var(--sp-3) 0;
}

/* Visual pills wrap */
.acc-pills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  align-items: center;
}

.acc-variation-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 15px;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-text);
  background: var(--c-surface);
  border: 1.5px solid var(--c-line-strong);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  user-select: none;
  text-decoration: none;
  outline: none;
  line-height: 1.35;
}

.acc-variation-pill:hover:not(:disabled):not(.is-disabled) {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: var(--c-primary-soft);
}

.acc-variation-pill:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.acc-variation-pill.is-selected {
  background: var(--c-primary) !important;
  color: var(--c-surface) !important;
  border-color: var(--c-primary) !important;
  box-shadow: 0 2px 8px rgba(8, 102, 208, 0.28);
  font-weight: 700;
}

.acc-variation-pill:disabled,
.acc-variation-pill.is-disabled {
  background: var(--c-subtle);
  border-color: var(--c-line);
  color: var(--c-muted);
  cursor: not-allowed;
  opacity: 0.55;
  text-decoration: line-through;
}

/* Reset link */
.acc-reset-variations-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--c-muted) !important;
  margin-top: var(--sp-2);
  text-decoration: none !important;
  transition: color 0.15s ease;
}

.acc-reset-variations-link:hover {
  color: var(--c-primary) !important;
}

@keyframes accPulseHighlight {
  0% { box-shadow: 0 0 0 0 rgba(8, 102, 208, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(8, 102, 208, 0); }
  100% { box-shadow: 0 0 0 0 rgba(8, 102, 208, 0); }
}

.acc-pulse-highlight {
  animation: accPulseHighlight 1.2s ease-out;
  border-color: var(--c-primary) !important;
}

/* ==========================================================================
   3. Account Upgrade Field
   ========================================================================== */
.acc-account-upgrade-wrapper {
  margin: var(--sp-4) 0;
  padding: var(--sp-4);
  background: var(--c-primary-soft);
  border: 1.5px solid var(--c-primary-line);
  border-radius: var(--r-md);
}

.acc-account-upgrade-wrapper .acc-field-label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-sm);
  color: var(--c-ink);
  margin-bottom: var(--sp-1);
}

.acc-account-upgrade-wrapper .acc-field-label .required {
  color: var(--c-danger);
  margin-left: 2px;
}

.acc-account-upgrade-wrapper .acc-field-desc {
  font-size: var(--fs-xs);
  color: var(--c-text);
  margin-bottom: var(--sp-2);
  line-height: 1.45;
}

.acc-account-upgrade-wrapper .acc-input-field {
  width: 100%;
  height: 42px;
  padding: 0 var(--sp-3);
  background-color: var(--c-surface) !important;
  border: 1px solid var(--c-line-strong) !important;
  border-radius: var(--r-sm) !important;
  color: var(--c-ink) !important;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  box-sizing: border-box;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.acc-account-upgrade-wrapper .acc-input-field:focus {
  border-color: var(--c-primary) !important;
  box-shadow: 0 0 0 3px var(--c-primary-line) !important;
  outline: none;
}

/* ==========================================================================
   4. Primary & Secondary CTAs & Quantity Stepper
   ========================================================================== */
.single_variation_wrap {
  margin-top: var(--sp-4);
}

.woocommerce-variation-add-to-cart {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  align-items: stretch;
}

/* Quantity input stepper */
.quantity {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--c-line-strong);
  border-radius: var(--r-md);
  background: var(--c-surface);
  overflow: hidden;
  height: 46px;
  flex: 0 0 auto;
}

.quantity input.qty {
  width: 44px;
  height: 100%;
  border: none !important;
  background: transparent !important;
  color: var(--c-ink) !important;
  font-family: var(--font-body) !important;
  font-weight: 700 !important;
  font-size: var(--fs-base) !important;
  text-align: center;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
}

.quantity .button.plus,
.quantity .button.minus {
  width: 34px;
  height: 100%;
  background: var(--c-subtle);
  border: none !important;
  color: var(--c-text) !important;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
  transition: background-color 0.15s ease;
}

.quantity .button.plus:hover,
.quantity .button.minus:hover {
  background: var(--c-line);
}

/* Secondary CTA: Thêm vào giỏ */
button.single_add_to_cart_button {
  flex: 1 1 150px;
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--c-surface) !important;
  color: var(--c-primary) !important;
  border: 2px solid var(--c-primary) !important;
  border-radius: var(--r-md) !important;
  padding: 0 var(--sp-4) !important;
  font-family: var(--font-heading) !important;
  font-size: var(--fs-sm) !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.02em;
  box-shadow: none !important;
  cursor: pointer;
  transition: all 0.15s ease;
}

button.single_add_to_cart_button:hover:not(:disabled):not(.is-disabled):not(.disabled) {
  background: var(--c-primary-soft) !important;
  color: var(--c-primary-hover) !important;
  border-color: var(--c-primary-hover) !important;
}

/* Primary CTA: Mua ngay */
button.acc-btn-buy-now {
  flex: 1 1 150px;
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--c-primary) !important;
  color: var(--c-surface) !important;
  border: 2px solid var(--c-primary) !important;
  border-radius: var(--r-md) !important;
  padding: 0 var(--sp-4) !important;
  font-family: var(--font-heading) !important;
  font-size: var(--fs-sm) !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.02em;
  box-shadow: var(--sh-1) !important;
  cursor: pointer;
  transition: all 0.15s ease;
}

button.acc-btn-buy-now:hover:not(:disabled):not(.is-disabled):not(.disabled) {
  background: var(--c-primary-hover) !important;
  border-color: var(--c-primary-hover) !important;
  box-shadow: var(--sh-2) !important;
}

/* Readable disabled state (meets WCAG contrast, NOT a 2.5:1 faded button) */
button.single_add_to_cart_button.disabled,
button.single_add_to_cart_button:disabled,
button.single_add_to_cart_button.wc-variation-selection-needed,
button.acc-btn-buy-now.disabled,
button.acc-btn-buy-now:disabled,
button.acc-btn-buy-now.is-disabled,
.acc-mobile-sticky-bar__btn.is-disabled,
.acc-mobile-sticky-bar__btn:disabled {
  background: var(--c-line) !important;
  border-color: var(--c-line-strong) !important;
  color: var(--c-text) !important;
  box-shadow: none !important;
  cursor: not-allowed !important;
  opacity: 1 !important;
}

/* ==========================================================================
   5. Product Trust Strip (3 Verified Claims Only)
   ========================================================================== */
.acc-trust-strip {
  margin: var(--sp-5) 0;
  padding: var(--sp-4);
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  box-shadow: var(--sh-1);
}

.acc-trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}

.acc-trust-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.acc-trust-icon {
  flex-shrink: 0;
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  background: var(--c-primary-soft);
}

.acc-trust-text {
  display: flex;
  flex-direction: column;
}

.acc-trust-title {
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.25;
}

.acc-trust-desc {
  font-size: var(--fs-xs);
  color: var(--c-muted);
  line-height: 1.25;
}

/* ==========================================================================
   6. Product Meta
   ========================================================================== */
.product_meta {
  margin-top: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--c-line);
  font-size: var(--fs-xs);
  color: var(--c-muted);
  line-height: 1.6;
}

.product_meta > span {
  display: block;
  margin-bottom: 4px;
}

.product_meta strong {
  color: var(--c-ink);
  font-weight: 600;
}

.product_meta a {
  color: var(--c-text);
  text-decoration: none;
}

.product_meta a:hover {
  color: var(--c-primary);
}

/* ==========================================================================
   7. Tabs & Description with TOC
   ========================================================================== */
.woocommerce-tabs,
.tabs-wrapper {
  background-color: var(--c-surface) !important;
  border: none !important;
  border-radius: 0 !important;
  padding: var(--sp-6) 0 !important;
  margin-top: var(--sp-8);
  box-shadow: none !important;
}

.woocommerce-tabs ul.tabs {
  border-bottom: 2px solid var(--c-line) !important;
  margin-bottom: var(--sp-6) !important;
  display: flex;
  gap: var(--sp-4);
  list-style: none;
  padding: 0;
}

.woocommerce-tabs ul.tabs li {
  background: transparent !important;
  border: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

.woocommerce-tabs ul.tabs li a {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--c-muted) !important;
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 3px solid transparent !important;
  display: inline-block;
  transition: all 0.15s ease;
  text-decoration: none !important;
}

.woocommerce-tabs ul.tabs li.active a {
  color: var(--c-primary) !important;
  border-bottom-color: var(--c-primary) !important;
}

/* 2-column description layout */
.acc-product-desc-layout {
  display: flex;
  gap: var(--sp-8);
  align-items: flex-start;
}

.acc-product-desc-content {
  flex: 1 1 0;
  max-width: 65ch;
  min-width: 0;
}

.acc-product-desc-sidebar {
  flex: 0 0 280px;
  width: 280px;
}

.acc-toc-sticky-box {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

/* TOC Card */
.acc-toc {
  background: var(--c-subtle);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: var(--sp-4);
  font-family: var(--font-body) !important;
}

.acc-toc__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-3);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--c-line);
}

.acc-toc__title-wrap {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--c-ink);
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
}

.acc-toc__icon {
  color: var(--c-primary);
  flex-shrink: 0;
}

.acc-toc__toggle {
  background: none;
  border: none;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--fs-xs);
  color: var(--c-primary);
  font-weight: 600;
  cursor: pointer;
}

.acc-toc__chevron {
  transition: transform 0.2s ease;
}

.acc-toc__chevron.is-collapsed {
  transform: rotate(-90deg);
}

.acc-toc__list,
.acc-toc__sublist {
  list-style: none;
  padding: 0;
  margin: 0;
}

.acc-toc__sublist {
  padding-left: var(--sp-3);
  border-left: 1.5px solid var(--c-line);
  margin-top: 4px;
  margin-bottom: 4px;
}

.acc-toc__item {
  margin-bottom: 5px;
}

.acc-toc__link {
  display: block;
  font-size: var(--fs-xs);
  line-height: 1.45;
  color: var(--c-text);
  text-decoration: none !important;
  padding: 4px 7px;
  border-radius: var(--r-sm);
  transition: all 0.15s ease;
}

.acc-toc__link:hover {
  color: var(--c-primary) !important;
  background: var(--c-primary-soft);
}

.acc-toc__link.is-active {
  color: var(--c-primary) !important;
  background: var(--c-primary-soft);
  font-weight: 700;
}

.acc-desc-heading {
  scroll-margin-top: 100px;
}

/* Typography in product prose */
.acc-prose h2 {
  font-family: var(--font-heading) !important;
  font-size: var(--fs-xl) !important;
  font-weight: 800 !important;
  color: var(--c-ink) !important;
  margin: var(--sp-6) 0 var(--sp-3) !important;
  line-height: var(--lh-tight) !important;
  text-wrap: balance !important;
}

.acc-prose h3 {
  font-family: var(--font-heading) !important;
  font-size: var(--fs-lg) !important;
  font-weight: 700 !important;
  color: var(--c-ink) !important;
  margin: var(--sp-5) 0 var(--sp-2) !important;
  line-height: var(--lh-tight) !important;
  text-wrap: balance !important;
}

.acc-prose p {
  font-size: var(--fs-base) !important;
  line-height: var(--lh-body) !important;
  color: var(--c-text) !important;
  margin-bottom: var(--sp-4) !important;
  max-width: 65ch;
  text-wrap: pretty !important;
}

.acc-prose ul,
.acc-prose ol {
  padding-left: var(--sp-5);
  margin-bottom: var(--sp-4);
}

.acc-prose li {
  margin-bottom: var(--sp-2);
  line-height: var(--lh-body);
  color: var(--c-text);
  max-width: 65ch;
}

.acc-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--sp-5) 0;
  font-family: var(--font-body) !important;
  font-size: 14px !important;
  line-height: 1.5;
}

.acc-prose table th,
.acc-prose table td {
  border: 1px solid var(--c-line) !important;
  padding: 10px 14px !important;
  font-family: var(--font-body) !important;
  font-size: 14px !important;
  color: var(--c-text) !important;
  background: transparent !important;
  box-shadow: none !important;
}

.acc-prose table th {
  background: var(--c-subtle) !important;
  color: var(--c-ink) !important;
  font-weight: 700;
  text-align: left;
}

.acc-prose table tr:nth-child(even) td {
  background: var(--c-subtle) !important;
}
.acc-prose a {
  color: var(--c-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.acc-prose a:hover {
  color: var(--c-primary-hover);
}

.acc-prose strong {
  color: var(--c-ink);
  font-weight: 700;
}

/* ==========================================================================
   8. Reviews Form & Comments Usability
   ========================================================================== */
#reviews #comments {
  margin-bottom: var(--sp-6);
}

.commentlist {
  list-style: none;
  padding: 0;
  margin: 0;
}

.commentlist li.comment {
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--c-line);
}

.comment_container {
  display: flex;
  gap: var(--sp-3);
}

.comment-text .meta {
  font-size: var(--fs-xs);
  color: var(--c-muted);
  margin-bottom: var(--sp-2);
}

#review_form_wrapper {
  background: var(--c-subtle);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: var(--sp-5);
  margin-top: var(--sp-4);
}

#review_form .comment-reply-title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: var(--sp-3);
}

#review_form .comment-form-rating {
  margin-bottom: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--c-ink);
  font-weight: 600;
}

#review_form input[type="text"],
#review_form input[type="email"],
#review_form textarea {
  width: 100%;
  border: 1px solid var(--c-line-strong) !important;
  border-radius: var(--r-sm) !important;
  background: var(--c-surface) !important;
  padding: 10px 14px;
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  margin-bottom: var(--sp-3);
}

#review_form textarea {
  min-height: 110px;
}

#review_form input[type="submit"] {
  background: var(--c-primary) !important;
  color: var(--c-surface) !important;
  border: none !important;
  border-radius: var(--r-md) !important;
  padding: 10px 24px !important;
  font-family: var(--font-heading) !important;
  font-size: var(--fs-sm) !important;
  font-weight: 700 !important;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

#review_form input[type="submit"]:hover {
  background: var(--c-primary-hover) !important;
}

/* ==========================================================================
   9. Mobile Sticky Bottom Bar
   ========================================================================== */
.acc-mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 998;
  background: var(--c-surface);
  border-top: 1px solid var(--c-line);
  box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
  padding: 10px var(--sp-4);
}

.acc-mobile-sticky-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  max-width: 600px;
  margin: 0 auto;
}

.acc-mobile-sticky-bar__price-box {
  display: flex;
  flex-direction: column;
}

.acc-mobile-sticky-bar__label {
  font-size: var(--fs-xs);
  color: var(--c-muted);
  line-height: 1.2;
}

.acc-mobile-sticky-bar__price {
  font-family: var(--font-heading);
  font-size: var(--fs-md);
  font-weight: 800;
  color: var(--c-price);
  line-height: 1.3;
}

.acc-mobile-sticky-bar__price del {
  font-size: var(--fs-xs);
  color: var(--c-price-old);
  margin-left: 4px;
}

.acc-mobile-sticky-bar__btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--c-primary);
  color: var(--c-surface);
  border: none;
  border-radius: var(--r-md);
  padding: 10px 20px;
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.acc-mobile-sticky-bar__btn:hover {
  background: var(--c-primary-hover);
}

/* ==========================================================================
   10. Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1023px) {
  .acc-product-desc-layout {
    flex-direction: column;
  }

  .acc-product-desc-sidebar {
    width: 100%;
    flex: 0 0 auto;
    order: -1;
    margin-bottom: var(--sp-5);
  }

  .acc-toc-sticky-box {
    position: static;
    max-height: none;
  }
}

@media (max-width: 767px) {
  .acc-mobile-sticky-bar.is-visible {
    display: block;
  }

  body.single-product {
    padding-bottom: 74px;
  }

  .product-info h1.product-title {
    font-size: var(--fs-xl) !important;
  }

  .acc-trust-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-3);
  }

  .woocommerce-variation-add-to-cart {
    flex-direction: column;
  }

  button.single_add_to_cart_button,
  button.acc-btn-buy-now {
    width: 100%;
    flex: 1 1 auto;
  }

  .variations_form table.variations th.label {
    width: 100%;
    display: block;
    padding-bottom: 4px;
  }

  .variations_form table.variations td.value {
    display: block;
    padding-top: 0;
  }
}

.screen-reader-text {
  font-size: 12px !important;
}