/* LabKart — product / test detail (light premium) */

.product {
  padding-block: var(--space-6) var(--space-20);
}

.product-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-size: var(--text-caption);
  color: var(--color-muted);
}

.product-breadcrumb a {
  color: var(--color-muted);
}

.product-breadcrumb a:hover {
  color: var(--color-primary);
}

.product-breadcrumb__sep {
  opacity: 0.5;
}

.product-layout {
  display: grid;
  gap: var(--space-8);
  align-items: start;
}

.product-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.product-hero-card {
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.product-hero-card::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -15%;
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle, rgba(184, 142, 47, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.product-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: var(--text-label);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.product-kicker svg {
  width: 0.875rem;
  height: 0.875rem;
}

.product-title {
  margin-bottom: var(--space-3);
  max-width: 22ch;
}

.product-lead {
  max-width: 40rem;
  margin-bottom: var(--space-5);
}

.product-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.375rem 0.7rem;
  font-size: var(--text-label);
  font-weight: 500;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

.chip svg {
  width: 0.875rem;
  height: 0.875rem;
  color: var(--color-primary);
}

.chip--success {
  color: var(--color-ink);
}

.chip--success svg {
  color: var(--color-success);
}

.product-section {
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.product-section__title {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.product-section p + p {
  margin-top: var(--space-3);
}

.param-list {
  display: grid;
  gap: var(--space-2);
}

.param-list__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-caption);
  font-weight: 500;
}

.param-list__item svg {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  margin-top: 0.1rem;
  color: var(--color-primary);
}

.who-list {
  display: grid;
  gap: var(--space-3);
}

.who-list li {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-body);
  color: var(--color-ink);
  line-height: var(--leading-snug);
}

.who-list li::before {
  content: "";
  flex-shrink: 0;
  width: 0.4rem;
  height: 0.4rem;
  margin-top: 0.55rem;
  border-radius: 50%;
  background: var(--color-primary);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-weight: 400;
  color: var(--color-muted);
  font-size: 1.25rem;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item__body {
  padding: 0 var(--space-4) var(--space-4);
  font-size: var(--text-caption);
  color: var(--color-muted);
  line-height: var(--leading-normal);
}

.related-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  transition: border-color var(--duration-fast) var(--ease-out);
}

.related-card:hover {
  border-color: rgba(184, 142, 47, 0.35);
}

.related-card__name {
  font-family: var(--font-display);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-ink);
}

.related-card:hover .related-card__name {
  color: var(--color-primary);
}

.related-card__price {
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-primary);
}

/* Sticky purchase panel */
.product-buy {
  position: sticky;
  top: calc(var(--header-height) + 1rem);
  padding: var(--space-6);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.product-buy__price-row {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.product-buy__price {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-primary);
  line-height: 1;
}

.product-buy__mrp {
  font-size: var(--text-body);
  color: var(--color-muted);
  text-decoration: line-through;
}

.product-buy__discount {
  display: inline-flex;
  padding: 0.2rem 0.5rem;
  font-size: var(--text-label);
  font-weight: 700;
  color: var(--color-discount);
  background: rgba(225, 29, 72, 0.08);
  border-radius: var(--radius-sm);
}

.product-buy__note {
  margin-bottom: var(--space-5);
}

.product-buy__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.product-buy__actions .btn {
  width: 100%;
}

.product-buy__trust {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.product-buy__trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-label);
  font-weight: 500;
  color: var(--color-muted);
}

.product-buy__trust-item svg {
  width: 1rem;
  height: 1rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.product-buy__feedback {
  margin-top: var(--space-3);
  font-size: var(--text-label);
  min-height: 1.25rem;
}

.product-buy__feedback.is-success {
  color: var(--color-success);
}

.product-buy__feedback.is-error {
  color: var(--color-discount);
}

/* Mobile sticky CTA */
.product-mobile-cta {
  display: none;
}

@media (max-width: 899px) {
  .product-mobile-cta {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    padding: var(--space-3) var(--container-pad);
    background: rgba(255, 255, 255, 0.94);
    border-top: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
  }

  .product-mobile-cta__price {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
  }

  .product-mobile-cta__mrp {
    display: block;
    font-size: var(--text-label);
    color: var(--color-muted);
    text-decoration: line-through;
    font-weight: 400;
  }

  body.has-mobile-cta {
    padding-bottom: 5rem;
  }

  .product-buy {
    display: none;
  }
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-hero-card,
  .product-section,
  .product-buy {
    padding: var(--space-8);
  }
}

@media (min-width: 900px) {
  .product-layout {
    grid-template-columns: 1fr 20rem;
    gap: var(--space-10);
  }

  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1100px) {
  .product-layout {
    grid-template-columns: 1fr 22rem;
  }
}