/* ==========================================================================
   HYDRO-TECH Equipment Showroom
   Aesthetic: Trusted Contractor Trade Catalog
   Typography: IBM Plex Sans (Primary UI & Copy) + JetBrains Mono (Technical Specs)
   Palette: Architectural Linen (#F7F6F2), Deep Charcoal Navy (#1A242B),
            Safety Orange (#D9531E), Technical Blue (#0284C7)
   ========================================================================== */

:root {
  /* Surfaces */
  --bg-page: #F7F6F2;
  --bg-surface: #FFFFFF;
  --bg-surface-subtle: #EFECE6;
  --border-subtle: #E3DFD7;
  --border-medium: #CDC7BD;
  --border-dark: #1A242B;

  /* Typography Colors */
  --text-ink: #1A242B;
  --text-secondary: #4F5E6B;
  --text-muted: #768490;
  --text-light: #F8FAFC;

  /* Targeted Accents (Restrained) */
  --accent-orange: #D9531E;
  --accent-orange-hover: #BF4314;
  --accent-blue: #0284C7;
  --accent-whatsapp: #25D366;

  /* Two Font Families Only */
  --font-primary: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Menlo, monospace;

  /* Geometry & Elevation */
  --radius-sm: 4px;
  --radius-md: 6px;
  --shadow-card: 0 1px 3px rgba(26, 36, 43, 0.05), 0 1px 2px rgba(26, 36, 43, 0.03);
  --shadow-hover: 0 8px 24px rgba(26, 36, 43, 0.08), 0 2px 6px rgba(26, 36, 43, 0.04);
  --shadow-modal: 0 20px 60px rgba(26, 36, 43, 0.25);

  --transition-fast: 0.15s ease;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-page);
  color: var(--text-ink);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hidden {
  display: none !important;
}

/* Icons */
.icon-whatsapp {
  width: 18px;
  height: 18px;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-ink);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-subtle);
  border-color: var(--text-ink);
}

/* ==========================================================================
   1. Site Header
   ========================================================================== */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.15rem 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.brand-link {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--text-ink);
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  line-height: 1.1;
}

.brand-tag {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: 0.15rem;
}

.header-contact {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-store-info {
  display: flex;
  flex-direction: column;
  text-align: right;
  font-size: 0.8125rem;
  line-height: 1.35;
}

.store-city {
  font-weight: 600;
  color: var(--text-ink);
}

.store-hours {
  color: var(--text-muted);
}

.btn-whatsapp-header {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--text-ink);
  color: #FFFFFF;
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-whatsapp-header:hover {
  background-color: #2D3D48;
}

.btn-whatsapp-header .icon-whatsapp {
  color: var(--accent-whatsapp);
}

@media (max-width: 680px) {
  .header-store-info {
    display: none;
  }
}

/* ==========================================================================
   2. Catalog Intro (Quiet Hero)
   ========================================================================== */
.catalog-intro {
  padding: 2.25rem 0 1rem;
}

.intro-content {
  max-width: 760px;
}

.catalog-title {
  font-size: clamp(1.6rem, 3.2vw, 2.25rem);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-ink);
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
}

.catalog-subtitle {
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* ==========================================================================
   3. Search & Category Tabs
   ========================================================================== */
.catalog-controls {
  padding: 0.75rem 0 1.5rem;
}

.controls-inner {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.search-box-wrap {
  position: relative;
  display: flex;
  align-items: center;
  max-width: 100%;
}

.search-icon {
  position: absolute;
  left: 1rem;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

#search-input {
  width: 100%;
  height: 46px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0 2.5rem 0 2.75rem;
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  color: var(--text-ink);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#search-input::placeholder {
  color: var(--text-muted);
}

#search-input:focus {
  border-color: var(--border-dark);
  box-shadow: 0 0 0 2px rgba(26, 36, 43, 0.08);
}

.search-clear-btn {
  position: absolute;
  right: 0.75rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 0.4rem;
  cursor: pointer;
}

.search-clear-btn:hover {
  color: var(--text-ink);
}

/* Category Navigation Tabs */
.category-tabs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.cat-tab {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.9rem;
  font-family: var(--font-primary);
  font-size: 0.84375rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.cat-tab:hover {
  background-color: var(--bg-surface-subtle);
  color: var(--text-ink);
}

.cat-tab.active {
  background-color: var(--text-ink);
  color: #FFFFFF;
  border-color: var(--text-ink);
}

/* ==========================================================================
   4. Catalog Grid & Cards
   ========================================================================== */
.catalog-container {
  flex: 1;
  padding-bottom: 4rem;
}

.catalog-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
}

.catalog-count {
  font-weight: 500;
  color: var(--text-secondary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* The Trade Card: Uncluttered & Direct */
.product-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.product-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-hover);
}

/* Card Media */
.card-media {
  position: relative;
  background-color: #FAF9F6;
  height: 250px;
  display: block;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
}

.product-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  padding: 0;
  transition: transform 0.25s ease;
}

.product-card:hover .product-photo {
  transform: scale(1.04);
}

.image-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8125rem;
  background-color: #FAF9F6;
}

/* Card Content */
.card-content {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-category {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.card-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-ink);
  line-height: 1.35;
  margin-bottom: 0.45rem;
  cursor: pointer;
}

.card-title:hover {
  color: var(--accent-orange);
}

.card-specs {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent-blue);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.card-specs:empty {
  display: none;
}

/* Card Footer: Price & Direct WhatsApp Action */
.card-footer {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.card-price {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent-orange);
}

.btn-whatsapp-card {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--text-ink);
  color: #FFFFFF;
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-whatsapp-card:hover {
  background-color: #2D3D48;
}

.btn-whatsapp-card .icon-whatsapp {
  color: var(--accent-whatsapp);
}

/* ==========================================================================
   5. Clean Datasheet Dialog (Product Spec Sheet)
   ========================================================================== */
.datasheet-dialog {
  border: none;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  max-width: 920px;
  width: 90vw;
  max-height: 90vh;
  padding: 0;
  box-shadow: var(--shadow-modal);
  margin: auto;
  overflow-y: auto;
}

.datasheet-dialog::backdrop {
  background: rgba(26, 36, 43, 0.6);
  backdrop-filter: blur(2px);
}

.datasheet-card {
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background-color: var(--bg-surface-subtle);
  color: var(--text-ink);
}

.datasheet-layout {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .datasheet-layout {
    grid-template-columns: 420px 1fr;
  }
}

.datasheet-media {
  background-color: #FAF9F6;
  padding: 0;
  display: flex;
  align-items: stretch;
  justify-content: center;
  min-height: 420px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}

@media (min-width: 768px) {
  .datasheet-media {
    border-bottom: none;
    border-right: 1px solid var(--border-subtle);
    min-height: 460px;
  }
}

#modal-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.datasheet-body {
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
}

.datasheet-category {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.datasheet-title {
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--text-ink);
  line-height: 1.3;
  margin-bottom: 1.5rem;
}

.datasheet-section-heading {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.65rem;
}

.datasheet-specs-section {
  margin-bottom: 1.5rem;
}

.datasheet-specs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.spec-token {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  background-color: #F0F9FF;
  color: var(--accent-blue);
  border: 1px solid #BAE6FD;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
}

.datasheet-desc-section {
  margin-bottom: 2rem;
}

.datasheet-desc-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.datasheet-footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.datasheet-price-block {
  display: flex;
  flex-direction: column;
}

.price-caption {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.datasheet-price {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent-orange);
}

.btn-whatsapp-direct {
  background-color: var(--text-ink);
  color: #FFFFFF;
  padding: 0.7rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.btn-whatsapp-direct:hover {
  background-color: #2D3D48;
}

.btn-whatsapp-direct .icon-whatsapp {
  color: var(--accent-whatsapp);
}

/* ==========================================================================
   6. Skeletons & States
   ========================================================================== */
.skeleton {
  pointer-events: none;
}

.skeleton-shimmer {
  background: linear-gradient(90deg, #ECE8DF 0%, #F5F2EC 50%, #ECE8DF 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-line {
  border-radius: var(--radius-sm);
  margin-bottom: 0.65rem;
}

.skeleton-badge { width: 30%; height: 14px; }
.skeleton-title { width: 85%; height: 20px; }
.skeleton-specs { width: 60%; height: 16px; }

.skeleton-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.85rem;
}

.skeleton-price { width: 40%; height: 22px; border-radius: var(--radius-sm); }
.skeleton-btn { width: 45%; height: 32px; border-radius: var(--radius-sm); }

.empty-state, .error-state {
  text-align: center;
  padding: 3.5rem 1.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  max-width: 500px;
  margin: 2rem auto;
}

.empty-title, .error-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-ink);
  margin-bottom: 0.5rem;
}

.empty-description, .error-description {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.pagination-wrap {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

/* ==========================================================================
   7. Contractor Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  margin-top: auto;
  padding: 3rem 0 2rem;
  color: var(--text-secondary);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.footer-brand-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-ink);
  margin-bottom: 0.35rem;
}

.footer-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 1.75rem;
  line-height: 1.55;
}

.footer-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.75rem;
}

.meta-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

.meta-val {
  display: block;
  font-size: 0.875rem;
  color: var(--text-ink);
  line-height: 1.45;
}

.footer-map-link {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  color: var(--accent-orange);
  text-decoration: none;
}

.footer-map-link:hover {
  text-decoration: underline;
}

.footer-phone-link {
  display: block;
  font-size: 0.875rem;
  color: var(--text-ink);
  font-weight: 600;
  text-decoration: none;
}

.footer-phone-link:hover {
  color: var(--accent-orange);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}