/* ========== Product Detail Page ========== */

.pd-intro,
.pd-details,
.pd-about,
.pd-faq,
.pd-related {
  background: var(--color-white);
}

.pd-intro__inner,
.pd-details__inner,
.pd-about__inner,
.pd-faq__inner,
.pd-related__inner {
  width: 100%;
  max-width: var(--product-max-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  box-sizing: border-box;
}

/* ---------- Intro: gallery + info ---------- */
.pd-intro {
  padding: 56px 0 40px;
}

.pd-intro__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 48px;
  align-items: start;
}

.pd-intro__gallery {
  min-width: 0;
}

.pd-intro__main {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
}

.pd-intro__main.is-dragging {
  cursor: grabbing;
}

.pd-intro__main img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 28px;
  box-sizing: border-box;
  background: var(--color-white);
  pointer-events: none;
  -webkit-user-drag: none;
  user-select: none;
}

.pd-intro__thumbs-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.pd-intro__nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  color: var(--color-text-muted);
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast),
    background var(--transition-fast);
}

.pd-intro__nav:hover {
  color: var(--color-white);
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.pd-intro__nav svg {
  width: 16px;
  height: 16px;
}

.pd-intro__thumbs {
  display: flex;
  gap: 10px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.pd-intro__thumbs::-webkit-scrollbar {
  display: none;
}

.pd-intro__thumb {
  flex: 0 0 calc((100% - 30px) / 4);
  min-width: 0;
  aspect-ratio: 1 / 1;
  padding: 0;
  border: 2px solid transparent;
  border-radius: 4px;
  background: var(--color-bg-gray);
  overflow: hidden;
  cursor: pointer;
  scroll-snap-align: start;
  transition: border-color var(--transition-fast);
}

.pd-intro__thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 8px;
  box-sizing: border-box;
  background: var(--color-white);
  pointer-events: none;
}

.pd-intro__thumb.is-active,
.pd-intro__thumb:hover {
  border-color: var(--color-primary);
}

.pd-intro__title {
  margin: 0 0 16px;
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-heading);
  letter-spacing: -0.02em;
}

.pd-intro__desc {
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-light);
}

.pd-intro__specs {
  width: 100%;
  margin: 0 0 28px;
  border-collapse: collapse;
  font-size: 14px;
}

.pd-intro__specs th,
.pd-intro__specs td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--color-border);
  vertical-align: top;
}

.pd-intro__specs th {
  width: 42%;
  font-weight: 600;
  color: var(--color-heading);
  background: var(--color-bg-gray);
}

.pd-intro__specs td {
  color: var(--color-text);
  background: var(--color-white);
}

.pd-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.pd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 148px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast);
}

.pd-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.pd-btn--primary {
  color: var(--color-white);
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.pd-btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.pd-btn--outline {
  color: var(--color-primary);
  background: var(--color-white);
  border: 1px solid var(--color-primary);
}

.pd-btn--outline:hover {
  color: var(--color-white);
  background: var(--color-primary);
}

/* ---------- Product details ---------- */
.pd-details {
  padding: 72px 0 72px;
}

.pd-details .section-heading {
  margin-bottom: 28px;
  padding-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: clamp(22px, 2.2vw, 28px);
  border-bottom: 3px solid var(--color-border);
}

.pd-details__subtitle {
  margin: 0 0 20px;
  font-size: 20px;
  font-weight: 700;
  color: #1a1e26;
}

.pd-details__subtitle--dark {
  color: var(--color-heading);
  margin-top: 40px;
}

.pd-details__media {
  width: 100%;
  margin: 0 0 36px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-bg-gray);
}

.pd-details__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.pd-details__text {
  margin: 0 0 36px;
}

.pd-details__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
}

.pd-details__text p:last-child {
  margin-bottom: 0;
}

.pd-details__tables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.pd-table-wrap {
  overflow-x: auto;
}

.pd-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.pd-table th,
.pd-table td {
  padding: 12px 14px;
  text-align: left;
  border: 1px solid var(--color-border);
  vertical-align: top;
}

.pd-table thead th {
  font-weight: 700;
  color: var(--color-heading);
  background: var(--color-bg-gray);
}

.pd-table tbody th {
  width: 40%;
  font-weight: 600;
  color: var(--color-heading);
  background: var(--color-bg-gray);
}

.pd-table tbody td {
  color: var(--color-text);
  background: var(--color-white);
}

.pd-table tbody tr:nth-child(even) td {
  background: #fafbfc;
}

.pd-table--full {
  margin-top: 0;
}

.pd-table--full tbody th {
  width: 28%;
}

/* ---------- About (fixed block) ---------- */
.pd-about {
  padding: 64px 0 48px;
  background: var(--color-bg-gray);
}

.pd-about__title {
  margin: 0 0 28px;
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-heading);
  letter-spacing: -0.02em;
}

.pd-about__media {
  width: 100%;
  margin: 0 0 28px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-white);
}

.pd-about__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 8;
  object-fit: cover;
}

.pd-about__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
}

.pd-about__text p:last-child {
  margin-bottom: 0;
}

/* ---------- FAQ (fixed block) ---------- */
.pd-faq {
  position: relative;
  padding: 48px 0 48px;
  overflow: hidden;
  background: var(--color-bg-gray);
}

.pd-faq__title {
  margin: 0 0 36px;
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-heading);
  letter-spacing: -0.02em;
}

.pd-faq .faq-item {
  background: var(--color-white);
}

.pd-faq .faq-item__question.is-active,
.pd-faq .faq-item.is-open .faq-item__question {
  color: var(--color-primary);
}

/* ---------- Related products ---------- */
.pd-related {
  padding: 48px 0 128px;
  background: var(--color-bg-gray);
}

.pd-related__title {
  margin: 0 0 36px;
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-heading);
  letter-spacing: -0.02em;
}

.pd-related__viewport {
  overflow: hidden;
  width: 100%;
  padding-bottom: 2px;
}

.pd-related__track {
  display: flex;
  flex-wrap: nowrap;
  gap: 24px;
  width: 100%;
  align-items: stretch;
  padding-bottom: 2px;
  will-change: transform;
  transition: transform 0.55s ease;
}

.pd-related__track .plist-card {
  flex: 0 0 calc((100% - 72px) / 4);
  min-width: 0;
  background: var(--color-white);
}

@media (max-width: 1100px) {
  .pd-intro__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .pd-intro__main {
    max-width: 520px;
    margin: 0 auto;
  }

  .pd-related__track .plist-card {
    flex: 0 0 calc((100% - 24px) / 2);
  }
}

@media (max-width: 768px) {
  .pd-intro {
    padding: 36px 0 24px;
  }

  .pd-details,
  .pd-about,
  .pd-faq {
    padding-bottom: 48px;
  }

  .pd-related {
    padding-bottom: 96px;
  }

  .pd-details__tables {
    grid-template-columns: 1fr;
  }

  .pd-details__media img,
  .pd-about__media img {
    aspect-ratio: 16 / 9;
  }

  .pd-related__track {
    gap: 14px;
  }

  .pd-related__track .plist-card {
    flex: 0 0 calc((100% - 14px) / 2);
  }

  .pd-intro__actions {
    flex-direction: column;
  }

  .pd-btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .pd-related {
    padding-bottom: 88px;
  }

  .pd-related__track .plist-card {
    flex: 0 0 100%;
  }
}