/* ============================================
   DETALLE PRODUCTO — Yeezy full-viewport
   ============================================ */

.nav--product {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--cream);
  border-bottom: 1px solid var(--gray-sep);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
}
.nav-back {
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark);
  transition: color 0.2s;
}
.nav-back:hover { color: var(--red); }

.pd-page { overflow: hidden; }

.pd-layout {
  display: grid;
  grid-template-columns: 72px 1fr 440px;
  min-height: calc(100vh - var(--nav-h));
}

/* Thumbnail strip */
.pd-thumbs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 12px;
  background: var(--cream);
  border-right: 1px solid var(--gray-sep);
}
.thumb-item {
  width: 48px;
  height: 62px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s;
  flex-shrink: 0;
  overflow: hidden;
}
.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.thumb-item.active { border-color: var(--dark); }
.thumb-item:hover { border-color: var(--gray-mid); }

/* Main gallery */
.pd-gallery {
  position: relative;
  overflow: hidden;
  background: var(--ph);
}
.pd-slides {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.pd-slide {
  min-width: 100%;
  height: 100%;
  flex-shrink: 0;
}
.pd-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.pd-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--white);
  background: rgba(0,0,0,0.28);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 2;
}
.pd-arrow:hover { background: rgba(0,0,0,0.55); }
.pd-arrow--prev { left: 20px; }
.pd-arrow--next { right: 20px; }

/* Info panel */
.pd-info {
  padding: 48px 48px;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--gray-sep);
  overflow-y: auto;
}
.pd-sku {
  font-family: var(--font-head);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 8px;
}
.pd-name {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  line-height: 1.1;
}
.pd-price {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.pd-divider {
  height: 1px;
  background: var(--gray-sep);
  margin: 24px 0;
}

/* Size selector */
.pd-size__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}
.pd-size__label {
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-mid);
}
.pd-size__guide {
  font-family: var(--font-head);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-mid);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.size-grid {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.size-btn {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  width: 52px;
  height: 44px;
  border: 1px solid var(--gray-inp);
  color: var(--dark);
  background: var(--white);
  transition: all 0.2s;
}
.size-btn:hover { border-color: var(--dark); }
.size-btn.active { background: var(--dark); color: var(--white); border-color: var(--dark); }

/* Add to cart */
.pd-atc { margin-bottom: 0; }

/* Description */
.pd-desc__text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray-mid);
}

/* Details */
.pd-details { margin-top: 20px; }
.pd-details__row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-sep);
  font-family: var(--font-head);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.pd-details__row span:first-child { color: var(--gray-mid); }
.pd-stock { color: var(--red); }

/* Dots */
.pd-dots {
  display: flex;
  gap: 6px;
  margin-top: 28px;
}
.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-inp);
}
.dot--active { background: var(--dark); }