/* ============================================
   BIOCESS - Product Page Styles
   ============================================ */

/* --- Product Gallery --- */
.product-gallery-section {
  padding: 8rem 0 5rem;
  background: var(--color-white);
}

.product-gallery-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.gallery-main {
  position: sticky;
  top: 100px;
}

.gallery-main-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-alt);
  aspect-ratio: 3/4;
  cursor: zoom-in;
  position: relative;
}

.gallery-main-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-main-img-wrap:hover img { transform: scale(1.03); }

.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.gallery-thumb {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  background: var(--color-bg-alt);
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-thumb.active,
.gallery-thumb:hover {
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

/* --- Product Info --- */
.product-info { padding: 1rem 0; }

.product-brand-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  margin-bottom: 0.6rem;
}

.product-name {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 3rem);
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: 0.4rem;
}

.product-subtitle {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.product-volume-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(127, 212, 175, 0.12);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-primary-light);
  margin-bottom: 1.8rem;
}

.product-desc-story {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 2.5rem;
  font-style: italic;
  border-left: 3px solid var(--color-primary);
  padding-left: 1.2rem;
}

/* Key Benefits */
.benefits-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 2.5rem;
}

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  transition: var(--transition);
}

.benefit-item:hover {
  background: rgba(127, 212, 175, 0.1);
  transform: translateX(4px);
}

.benefit-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(127, 212, 175, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary-dark);
  font-size: 0.9rem;
}

.benefit-text h5 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.15rem;
  letter-spacing: 0.02em;
}

.benefit-text p {
  font-size: 0.78rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* CTA Buttons */
.product-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.product-amazon-note {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--color-text-light);
  padding: 0.8rem 1rem;
  background: #fff8f5;
  border-radius: var(--radius-sm);
  border: 1px solid #ffd5c8;
}

.product-amazon-note i { color: #FF9900; }

/* --- How It Works --- */
#how-it-works {
  padding: 7rem 0;
  background: var(--color-bg-alt);
}

.skin-layers-diagram {
  position: relative;
  max-width: 700px;
  margin: 4rem auto 0;
  padding: 3rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.skin-cross-section {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.skin-layer {
  display: flex;
  align-items: center;
  padding: 1.1rem 1.5rem;
  gap: 1.5rem;
  position: relative;
  transition: var(--transition);
}

.skin-layer:hover { transform: translateX(4px); }

.skin-layer-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  width: 32px;
  flex-shrink: 0;
}

.skin-layer-info h5 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.15rem;
}

.skin-layer-info p {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.4;
}

.skin-layer-mw {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.7);
  text-align: right;
  flex-shrink: 0;
}

/* --- How To Use --- */
#how-to-use {
  padding: 7rem 0;
  background: var(--color-white);
}

.steps-row {
  display: flex;
  gap: 0;
  align-items: flex-start;
  margin-top: 4rem;
  position: relative;
}

.steps-row::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(40px + 1rem);
  right: calc(40px + 1rem);
  height: 1px;
  background: var(--color-border);
}

.use-step {
  flex: 1;
  text-align: center;
  position: relative;
  padding: 0 1rem;
}

.use-step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary-dark);
  color: white;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(45,95,78,0.3);
}

.use-step-icon {
  font-size: 1.5rem;
  margin-bottom: 0.6rem;
  display: block;
  color: var(--color-primary-dark);
}

.use-step-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.use-step-desc {
  font-size: 0.78rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Full Ingredients --- */
#ingredients-full {
  padding: 7rem 0;
  background: var(--color-bg);
}

.ingredients-table-wrap {
  margin-top: 3rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.ingredients-table-header {
  display: grid;
  grid-template-columns: 60px 1fr 200px 1fr;
  padding: 1rem 1.5rem;
  background: var(--color-primary-dark);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.ingredients-table-row {
  display: grid;
  grid-template-columns: 60px 1fr 200px 1fr;
  padding: 0.9rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
  align-items: center;
}

.ingredients-table-row:last-child { border-bottom: none; }
.ingredients-table-row:hover { background: rgba(127,212,175,0.06); }

.ing-num {
  font-size: 0.78rem;
  color: var(--color-text-light);
  font-weight: 600;
}

.ing-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.ing-inci {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-style: italic;
}

.ing-function {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.ing-badge {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.ing-badge-key {
  background: rgba(127,212,175,0.15);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-primary-light);
}

.ing-badge-ha {
  background: rgba(45,95,78,0.1);
  color: var(--color-primary-dark);
  border: 1px solid rgba(45,95,78,0.2);
}

/* Ingredient search */
.ingredients-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.ingredients-search {
  flex: 1;
  min-width: 200px;
  padding: 0.7rem 1rem 0.7rem 2.8rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  outline: none;
  transition: var(--transition);
  background: var(--color-white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cpath d='M21 21l-4.35-4.35'%3E%3C/path%3E%3C/svg%3E") no-repeat 1rem center;
}

.ingredients-search:focus { border-color: var(--color-primary); }

.ingredients-count {
  font-size: 0.8rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

/* --- Size & Value --- */
#size-value {
  padding: 5rem 0;
  background: var(--color-primary-dark);
  color: white;
}

.size-value-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5rem;
  text-align: center;
}

.size-value-stat { }

.size-value-num {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 5vw, 5rem);
  color: var(--color-primary-light);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.size-value-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.size-value-divider {
  width: 1px;
  height: 80px;
  background: rgba(255,255,255,0.15);
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .product-gallery-inner { grid-template-columns: 1fr; }
  .gallery-main { position: static; }
  .steps-row { flex-direction: column; align-items: center; gap: 2rem; }
  .steps-row::before { display: none; }
  .use-step { max-width: 300px; }
  .ingredients-table-header,
  .ingredients-table-row { grid-template-columns: 40px 1fr 1fr; }
  .ing-function { display: none; }
  .size-value-inner { flex-direction: column; gap: 2rem; }
  .size-value-divider { width: 80px; height: 1px; }
}

@media (max-width: 600px) {
  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
  .ingredients-table-header,
  .ingredients-table-row { grid-template-columns: 40px 1fr; }
  .ing-inci { display: none; }
}