/* === BASE === */
:root {
  --cream: #F7F4EF;
  --cream-deep: #EDE9E2;
  --navy: #111827;
  --navy-mid: #1F2937;
  --amber: #D97706;
  --amber-light: #FEF3C7;
  --text: #111827;
  --text-muted: #6B7280;
  --border: #E5E0D8;
  --green: #059669;
  --green-light: #D1FAE5;
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--cream);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === NAV === */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--cream);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--navy);
  text-decoration: none;
}

.nav__brand:hover { opacity: 0.8; }

.nav__tag {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--cream-deep);
  padding: 0.375rem 0.75rem;
  border-radius: 2rem;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav__link:hover, .nav__link.active { color: var(--navy); }

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.375rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--amber);
  color: #fff;
}

.btn-primary:hover { background: #B45309; }

.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 1.5px solid var(--border);
}

.btn-outline:hover { border-color: var(--navy); background: var(--cream-deep); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 0.5rem 0.75rem;
}

.btn-ghost:hover { color: var(--navy); background: var(--cream-deep); }

.btn-sm {
  font-size: 0.8125rem;
  padding: 0.375rem 0.875rem;
}

/* === CATALOG LAYOUT === */
.catalog-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem 4rem;
}

.catalog-header {
  padding: 3rem 0 2rem;
}

.catalog-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.catalog-header p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* === CATEGORY FILTERS === */
.category-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.category-chip {
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  font-family: var(--font-body);
}

.category-chip:hover, .category-chip.active {
  border-color: var(--amber);
  color: var(--amber);
  background: var(--amber-light);
}

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

.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: box-shadow 0.2s, transform 0.2s;
}

.product-card:hover {
  box-shadow: 0 8px 32px rgba(17, 24, 39, 0.08);
  transform: translateY(-2px);
}

.product-card__image {
  height: 160px;
  background: var(--cream-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.product-card__body {
  padding: 1.25rem;
}

.product-card__category {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.375rem;
}

.product-card__name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.product-card__cas {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.product-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border);
  margin-top: 0.875rem;
}

.product-card__purity {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green);
  background: var(--green-light);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
}

.product-card__price {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--navy);
}

.product-card__stock {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--green);
  margin-bottom: 0.25rem;
}

.stock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

/* === PRODUCT DETAIL === */
.product-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem 4rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover { color: var(--navy); }
.breadcrumb span { color: var(--border); }

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  padding-top: 2rem;
  align-items: start;
}

.product-info h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 0.75rem;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.meta-chip {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  background: var(--cream-deep);
  color: var(--text-muted);
}

.meta-chip.amber {
  background: var(--amber-light);
  color: var(--amber);
}

.meta-chip.green {
  background: var(--green-light);
  color: var(--green);
}

.product-description {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.product-formula {
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.product-order-section {
  background: var(--cream-deep);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.product-price {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
}

.product-price span {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-muted);
  font-family: var(--font-body);
}

/* === BATCH / COA SECTION === */
.batch-section {
  margin-top: 1.5rem;
}

.batch-section h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 1rem;
}

.batch-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.batch-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.batch-card:hover, .batch-card.selected {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-light);
}

.batch-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1rem;
}

.batch-number {
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: monospace;
  color: var(--navy);
}

.batch-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.batch-status {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1875rem 0.5rem;
  border-radius: 2rem;
}

.batch-status.available {
  background: var(--green-light);
  color: var(--green);
}

.batch-status.expiring-soon {
  background: var(--amber-light);
  color: var(--amber);
}

/* === COA VERIFICATION PANEL === */
.coa-panel {
  background: #fff;
  border: 1.5px solid var(--amber);
  border-radius: 0 0 0.5rem 0.5rem;
  overflow: hidden;
  display: none;
}

.coa-panel.open { display: block; }

.coa-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1rem;
  background: var(--amber-light);
  border-bottom: 1px solid var(--border);
}

.coa-panel__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.coa-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.1875rem 0.5rem;
  border-radius: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.coa-badge.verified {
  background: var(--green-light);
  color: var(--green);
}

.coa-badge.pending {
  background: var(--amber-light);
  color: var(--amber);
}

.coa-panel__body {
  padding: 1.25rem;
}

.coa-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.coa-metric {
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
  text-align: center;
}

.coa-metric__value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  display: block;
}

.coa-metric__label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: block;
  margin-top: 0.25rem;
}

.coa-tests {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.coa-test {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.coa-test__icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  flex-shrink: 0;
}

.coa-test__icon.pass {
  background: var(--green-light);
  color: var(--green);
}

.coa-test__icon.fail {
  background: #FEE2E2;
  color: #DC2626;
}

.coa-test__name {
  flex: 1;
  font-weight: 500;
  color: var(--navy);
}

.coa-test__value {
  font-weight: 700;
  color: var(--text);
  font-size: 0.8125rem;
}

.coa-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border);
}

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

.coa-notes {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 0.5rem;
  font-style: italic;
}

/* === EMPTY STATE === */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}

.empty-state h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* === SEARCH BAR === */
.search-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 0.5rem;
  padding: 0 1rem;
  margin-bottom: 1.5rem;
  transition: border-color 0.15s;
}
.search-bar:focus-within { border-color: var(--amber); }
.search-icon { color: var(--text-muted); flex-shrink: 0; }
.search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: 0.75rem 0;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  background: transparent;
  color: var(--text);
}
.search-input::placeholder { color: var(--text-muted); }
.search-clear {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.25rem;
  border-radius: 0.25rem;
  flex-shrink: 0;
}
.search-clear:hover { color: var(--navy); background: var(--cream-deep); }

/* === QUANTITY SELECTOR === */
.qty-controls {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1.5px solid var(--border);
  border-radius: 0.375rem;
  overflow: hidden;
  width: fit-content;
}
.qty-btn {
  background: var(--cream-deep);
  border: none;
  padding: 0.5rem 1rem;
  font-size: 1.125rem;
  font-weight: 400;
  cursor: pointer;
  color: var(--navy);
  transition: background 0.1s;
}
.qty-btn:hover { background: var(--cream); }
.qty-input {
  border: none;
  outline: none;
  width: 80px;
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--navy);
  background: #fff;
  padding: 0.5rem 0;
}
.qty-input::-webkit-inner-spin-button,
.qty-input::-webkit-outer-spin-button { -webkit-appearance: none; }

/* === CATALOG CONTACT === */
.catalog-contact {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}
.catalog-contact h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}
.catalog-contact p { font-size: 0.875rem; color: var(--text-muted); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav { padding: 1rem 1.25rem; }
  .catalog-page, .product-page { padding: 0 1.25rem 3rem; }
  .product-detail { grid-template-columns: 1fr; gap: 2rem; }
  .coa-metrics { grid-template-columns: 1fr 1fr; }
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .catalog-contact { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .coa-metrics { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
}

/* === CTA SECTION === */
.cta-bar {
  background: var(--navy);
  color: #fff;
  padding: 1.25rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cta-bar__text {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.8);
}

.cta-bar__text strong {
  color: #fff;
  font-weight: 700;
}

/* === Purity bar === */
.purity-bar-wrap {
  margin-top: 0.5rem;
}

.purity-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.purity-bar {
  height: 6px;
  background: var(--cream-deep);
  border-radius: 3px;
  overflow: hidden;
}

.purity-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green), #10B981);
  border-radius: 3px;
  transition: width 0.4s ease;
}