/* ============================================================
   QUÍMICOS FUNCIONALES — productos.css
   ============================================================ */

/* ===== PRODUCTS HERO ===== */
.products-hero {
  position: relative;
  min-height: 55vh;
  display: flex;
  align-items: flex-end;
  padding-top: var(--header-height);
  overflow: hidden;
}

.products-hero-bg {
  position: absolute;
  inset: 0;
}

.products-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.products-hero-content {
  position: relative;
  z-index: 2;
  padding-block: var(--space-16);
}

.products-hero-title {
  font-size: clamp(var(--text-4xl), 8vw, var(--text-7xl));
  font-weight: 900;
  color: var(--color-white);
  text-transform: uppercase;
  line-height: 0.95;
  margin-block: var(--space-4) var(--space-5);
}

.products-hero-title span {
  color: var(--color-orange);
}

.products-hero-content p {
  color: rgba(255,255,255,0.7);
  font-weight: 300;
  font-size: var(--text-base);
  max-width: 50ch;
}

/* ===== STICKY NAV ===== */
.products-sticky-nav {
  position: sticky;
  top: var(--header-height);
  z-index: var(--z-raised);
  background: var(--color-navy);
  box-shadow: var(--shadow-md);
  border-bottom: 2px solid var(--color-orange);
}

.products-sticky-nav-inner {
  display: flex;
  align-items: center;
  overflow-x: auto;
  gap: 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-block: 0;
}

.products-sticky-nav-inner::-webkit-scrollbar {
  display: none;
}

.pnav-link {
  flex-shrink: 0;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.pnav-link:hover,
.pnav-link.active {
  color: var(--color-white);
  border-bottom-color: var(--color-orange);
}

/* ===== PRODUCT SECTIONS ===== */
.product-section {
  scroll-margin-top: calc(var(--header-height) + 52px);
  border-bottom: 1px solid var(--color-gray-100);
}

/* ===== PRODUCT BANNER ===== */
.product-banner {
  position: relative;
  height: 300px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.product-banner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.product-section:hover .product-banner img {
  transform: scale(1.03);
}

.product-banner-overlay {
  position: absolute;
  inset: 0;
}

.product-banner--orange .product-banner-overlay {
  background: linear-gradient(160deg, rgba(244,98,31,0.88) 0%, rgba(204,77,15,0.75) 100%);
}

.product-banner--navy .product-banner-overlay {
  background: linear-gradient(160deg, rgba(14,29,59,0.90) 0%, rgba(28,51,102,0.75) 100%);
}

.product-banner-content {
  position: relative;
  z-index: 2;
  padding-block: var(--space-8);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
}

.product-banner-title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 900;
  color: var(--color-white);
  text-transform: uppercase;
  line-height: 1.0;
}

.product-banner--navy .product-banner-title {
  color: var(--color-yellow);
}

/* ===== TOGGLE BUTTON ===== */
.product-toggle-btn {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.15);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast);
  border: 1.5px solid rgba(255,255,255,0.2);
}

.product-toggle-btn:hover {
  background: rgba(255,255,255,0.25);
}

.product-toggle-btn .toggle-icon-close { display: none; }
.product-toggle-btn[aria-expanded="false"] .toggle-icon-open { display: none; }
.product-toggle-btn[aria-expanded="false"] .toggle-icon-close { display: block; }

/* ===== PRODUCT LIST WRAPPER ===== */
.product-list-wrapper {
  padding-block: var(--space-10) var(--space-12);
  overflow: hidden;
  transition: max-height 0.5s var(--ease-out), opacity 0.4s var(--ease-out), padding 0.4s;
  max-height: 2000px;
}

.product-list-wrapper.collapsed {
  max-height: 0;
  opacity: 0;
  padding-block: 0;
}

.product-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  font-weight: 300;
  max-width: 80ch;
}

.product-description--orange {
  color: var(--color-orange);
  font-weight: 400;
}

/* ===== PRODUCT LISTS ===== */
.product-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3) var(--space-8);
  margin-bottom: var(--space-8);
}

.product-list li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.product-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gray-300);
}

.product-list--orange li::before {
  background: var(--color-orange);
}

.product-list--navy li::before {
  background: var(--color-navy);
}

.product-cta {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-gray-100);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 639px) {
  .product-list {
    grid-template-columns: 1fr;
  }

  .product-banner {
    height: 220px;
  }

  .products-hero {
    min-height: 50vh;
  }
}