/* Biotech Sci-Fi UI — full-site overlay */

:root {
  --ink: #e2e8f0;
  --muted: #94a3b8;
  --line: rgba(56, 189, 248, 0.18);
  --paper: #060d18;
  --white: #f8fafc;
  --teal: #38bdf8;
  --teal-dark: #0ea5e9;
  --mint: rgba(14, 165, 233, 0.12);
  --navy: #f1f5f9;
  --bio-bg: #060d18;
  --bio-panel: rgba(10, 22, 40, 0.72);
  --bio-panel-solid: #0a1628;
  --bio-border: rgba(56, 189, 248, 0.22);
  --bio-glow: rgba(56, 189, 248, 0.45);
  --bio-accent: #38bdf8;
  --bio-accent2: #818cf8;
  --bio-grid: rgba(56, 189, 248, 0.06);
  --institute-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
  --institute-sans: "IBM Plex Sans", Inter, "Segoe UI", sans-serif;
}

html {
  background: var(--bio-bg);
  color-scheme: dark;
}

body {
  font-family: var(--institute-sans);
  color: var(--ink);
  background-color: var(--bio-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(14, 165, 233, 0.14) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    linear-gradient(var(--bio-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bio-grid) 1px, transparent 1px);
  background-size: auto, auto, 32px 32px, 32px 32px;
}

/* ── Header: glass sci-fi bar ── */
.site-header {
  min-height: 72px;
  padding-top: 3px;
  border-bottom: 1px solid var(--bio-border);
  background: rgba(6, 13, 24, 0.82);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4), inset 0 -1px 0 rgba(56, 189, 248, 0.08);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--bio-accent) 20%, var(--bio-accent2) 50%, var(--bio-accent) 80%, transparent 100%);
  box-shadow: 0 0 12px var(--bio-glow);
}

.brand strong {
  color: var(--white);
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand small {
  font-family: var(--institute-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bio-accent);
  opacity: 0.85;
}

.brand-mark {
  border-radius: 6px;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.35), 0 0 0 1px rgba(56, 189, 248, 0.3);
}

.nav {
  color: #cbd5e1;
  font-size: 13px;
  font-weight: 600;
}

.nav a {
  color: #94a3b8;
  transition: color 0.2s, border-color 0.2s, text-shadow 0.2s;
}

.nav a.is-active,
.nav a:hover {
  color: var(--bio-accent);
  border-bottom-color: var(--bio-accent);
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}

.nav-dropdown-menu {
  border-radius: 6px;
  border: 1px solid var(--bio-border);
  background: rgba(10, 22, 40, 0.95);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(56, 189, 248, 0.1);
}

.nav-dropdown-menu a {
  color: #94a3b8;
}

.nav-dropdown-menu a:hover {
  background: rgba(56, 189, 248, 0.1);
  color: var(--bio-accent);
}

.menu-button {
  border-color: var(--bio-border);
  background: var(--bio-panel);
}

.menu-button span {
  background: var(--white);
}

.header-cta,
.primary-button,
.cart-action,
.contact-form-panel button,
.quick-message-board button,
.quote-form button {
  border: 1px solid rgba(56, 189, 248, 0.5);
  border-radius: 6px;
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.03em;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transition: box-shadow 0.2s, transform 0.2s;
}

.header-cta:hover,
.primary-button:hover,
.cart-action:hover,
.contact-form-panel button:hover,
.quick-message-board button:hover {
  box-shadow: 0 0 32px rgba(56, 189, 248, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.secondary-button {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.6);
  color: var(--bio-accent);
  backdrop-filter: blur(8px);
  box-shadow: inset 0 0 20px rgba(56, 189, 248, 0.05);
}

.secondary-button:hover {
  border-color: var(--bio-accent);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.2);
}

.cart-header-button > span:not(.cart-label) {
  background: var(--bio-bg);
  color: var(--bio-accent);
}

/* ── Hero: dark biotech cinematic ── */
.hero {
  position: relative;
  min-height: calc(100vh - 75px);
  overflow: hidden;
  border-bottom: 1px solid var(--bio-border);
  background-color: #040810;
  background-image:
    linear-gradient(105deg, rgba(4, 8, 16, 0.92) 0%, rgba(4, 8, 16, 0.78) 38%, rgba(4, 8, 16, 0.35) 58%, rgba(4, 8, 16, 0.1) 72%, transparent 85%),
    var(--hero-image, none);
  background-position: center right;
  background-size: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 40%, rgba(56, 189, 248, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 30% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-content::before {
  content: "RUO · Research Use Only";
  display: inline-block;
  margin-bottom: 18px;
  padding: 5px 12px;
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: 4px;
  background: rgba(14, 165, 233, 0.1);
  font-family: var(--institute-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bio-accent);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.15), inset 0 0 12px rgba(56, 189, 248, 0.05);
}

.hero .eyebrow {
  color: var(--bio-accent);
}

.hero .eyebrow::before {
  background: var(--bio-accent);
  box-shadow: 0 0 8px var(--bio-glow);
}

.hero h1 {
  color: var(--white);
  text-shadow: 0 0 40px rgba(56, 189, 248, 0.2);
  letter-spacing: -0.03em;
}

.hero p:not(.eyebrow) {
  color: #94a3b8;
  font-size: 17px;
  line-height: 1.75;
}

.hero-stats span {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.65);
  backdrop-filter: blur(12px);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  color: #94a3b8;
}

.hero-stats strong {
  font-family: var(--institute-mono);
  font-size: 22px;
  color: var(--bio-accent);
  text-shadow: 0 0 16px rgba(56, 189, 248, 0.4);
}

/* ── Eyebrow labels ── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--institute-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bio-accent);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 12px;
  background: var(--bio-accent);
  border-radius: 1px;
  box-shadow: 0 0 8px var(--bio-glow);
}

h1, h2, h3 {
  color: var(--white);
}

.section-heading p,
.trust-item p,
.catalog-hero p,
.about-hero p,
.faq-page-hero p,
.contact-page-hero p,
.blog-page-hero p,
.product-info-section p,
.quote-card blockquote {
  color: #94a3b8;
}

/* ── Trust band ── */
.trust-band {
  background: var(--bio-border);
  border-color: var(--bio-border);
}

.trust-item {
  background: var(--bio-panel-solid);
  border-left: 2px solid transparent;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.trust-item:hover {
  border-left-color: var(--bio-accent);
  box-shadow: inset 4px 0 20px rgba(56, 189, 248, 0.08);
}

.trust-item h2 {
  font-size: 17px;
  color: var(--white);
}

/* ── Sections ── */
.section {
  position: relative;
}

.product-section,
.feedback-section,
.evidence-section {
  background: var(--bio-panel-solid);
  border-top: 1px solid var(--bio-border);
  border-bottom: 1px solid var(--bio-border);
}

.quick-message-section {
  background: linear-gradient(180deg, rgba(14, 165, 233, 0.06) 0%, var(--bio-bg) 100%);
  border-top: 1px solid var(--bio-border);
}

.bestseller-trust-row span,
.about-category-list span,
.faq-topic-list span,
.blog-topic-list b,
.blog-keywords span {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(14, 165, 233, 0.08);
  font-family: var(--institute-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--bio-accent);
}

.bestseller-category-card {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: #0a1628;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.bestseller-category-card:hover {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 8px 32px rgba(56, 189, 248, 0.15);
}

.bestseller-category-label {
  border-radius: 4px;
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.4);
}

.bestseller-coa-button {
  border-color: rgba(56, 189, 248, 0.4);
  color: var(--bio-accent);
  font-family: var(--institute-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
}

/* ── COA table ── */
.coa-table {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.8);
  box-shadow: 0 0 32px rgba(56, 189, 248, 0.06);
  overflow: hidden;
}

.coa-table div {
  border-color: var(--bio-border);
  color: #cbd5e1;
}

.coa-table div:first-child {
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.2) 0%, rgba(99, 102, 241, 0.15) 100%);
  font-family: var(--institute-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--bio-border);
}

.coa-table div:first-child strong {
  color: var(--bio-accent);
}

.coa-table div:not(:first-child):nth-child(even) {
  background: rgba(56, 189, 248, 0.03);
}

.coa-table span:nth-child(3) {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
}

.coa-table button {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(14, 165, 233, 0.1);
  color: var(--bio-accent);
  font-family: var(--institute-mono);
  font-size: 11px;
  transition: box-shadow 0.2s, background 0.2s;
}

.coa-table button:hover {
  background: rgba(14, 165, 233, 0.2);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.25);
}

.coa-more-button {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: transparent;
  color: var(--bio-accent);
  font-family: var(--institute-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.coa-more-button:hover {
  background: rgba(14, 165, 233, 0.1);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.2);
}

.coa-report-viewer {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: #0a1628;
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.1);
}

/* ── Cards ── */
.quote-card {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.7);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.quote-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 8px 32px rgba(56, 189, 248, 0.1);
}

.quote-card blockquote {
  color: #e2e8f0;
}

.quote-avatar {
  border-radius: 4px;
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
  font-family: var(--institute-mono);
}

.quote-card-header b,
.quote-card footer {
  font-family: var(--institute-mono);
  font-size: 11px;
  color: var(--bio-accent);
}

.quote-card-header strong {
  color: var(--white);
}

.quote-card-header small {
  color: #64748b;
}

/* ── Forms ── */
.quick-message-fields {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.8);
  box-shadow: 0 0 32px rgba(56, 189, 248, 0.06);
}

.quick-message-board input,
.quick-message-board textarea,
.contact-form-panel input,
.contact-form-panel textarea,
.quote-form input,
.quote-form textarea {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(6, 13, 24, 0.8);
  color: var(--white);
}

.quick-message-board input::placeholder,
.quick-message-board textarea::placeholder,
.contact-form-panel input::placeholder,
.contact-form-panel textarea::placeholder {
  color: #64748b;
}

.quick-message-board input:focus,
.quick-message-board textarea:focus,
.contact-form-panel input:focus,
.contact-form-panel textarea:focus {
  border-color: var(--bio-accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15), 0 0 20px rgba(56, 189, 248, 0.1);
  background: rgba(10, 22, 40, 0.9);
}

/* ── Inner pages ── */
.products-page,
.product-detail-page,
.coa-page,
.about-page,
.faq-page,
.contact-page,
.blog-page,
.not-found-page {
  background:
    radial-gradient(ellipse 70% 40% at 50% 0%, rgba(14, 165, 233, 0.08) 0%, transparent 60%),
    var(--bio-bg);
}

.catalog-filter-row a,
.catalog-filter-row button {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(10, 22, 40, 0.8);
  color: #94a3b8;
  font-family: var(--institute-mono);
  font-size: 12px;
}

.catalog-filter-row a.active,
.catalog-filter-row button.active {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.35);
}

.catalog-status,
.catalog-category-card,
.catalog-results-heading,
.catalog-product-card,
.product-detail-gallery,
.product-detail-summary,
.purchase-panel,
.coa-library-card,
.about-page-grid article,
.about-category-panel,
.about-official-panel,
.about-quality-band,
.contact-info-panel,
.contact-form-panel,
.faq-note,
.faq-item,
.blog-sidebar,
.blog-post-card,
.not-found-panel,
.cart-drawer,
.coa-modal,
.cart-item {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.75);
  color: #cbd5e1;
}

.catalog-category-card:hover,
.catalog-category-card.active {
  border-color: var(--bio-accent);
  background: rgba(14, 165, 233, 0.08);
}

.catalog-product-card:hover {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 8px 32px rgba(56, 189, 248, 0.12);
  transform: translateY(-4px);
}

.catalog-product-card h3,
.blog-post-card h2,
.blog-post-card h2 a {
  color: var(--white);
}

.catalog-product-card > p {
  font-family: var(--institute-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bio-accent);
}

.catalog-product-card dt {
  font-family: var(--institute-mono);
  font-size: 11px;
  color: #64748b;
  text-transform: uppercase;
}

.catalog-product-card dd {
  color: #94a3b8;
}

.catalog-price-current {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
}

.catalog-status strong {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

.catalog-pagination button {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(10, 22, 40, 0.8);
  color: #94a3b8;
  font-family: var(--institute-mono);
}

.catalog-pagination button.active,
.catalog-pagination button:hover:not(:disabled) {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 16px rgba(14, 165, 233, 0.3);
}

.chemical-spec-table span {
  font-family: var(--institute-mono);
  font-size: 11px;
  color: #64748b;
  text-transform: uppercase;
}

.chemical-spec-table strong {
  font-family: var(--institute-mono);
  color: var(--white);
}

.chemical-spec-table div:nth-child(odd) {
  background: rgba(56, 189, 248, 0.03);
}

.format-options button {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(6, 13, 24, 0.8);
  color: #94a3b8;
  font-family: var(--institute-mono);
}

.format-options button.active,
.format-options button:hover {
  border-color: var(--bio-accent);
  background: rgba(14, 165, 233, 0.15);
  color: var(--bio-accent);
}

.format-options button.active {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  color: #fff;
}

.purchase-total {
  background: rgba(14, 165, 233, 0.08);
}

.purchase-total strong {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
}

.product-breadcrumb,
.product-breadcrumb a,
.product-breadcrumb button {
  color: #64748b;
  font-family: var(--institute-mono);
  font-size: 12px;
}

.product-breadcrumb a,
.product-breadcrumb button {
  color: var(--bio-accent);
}

.product-detail-image {
  border-color: var(--bio-border);
  background: radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.08), transparent 60%), #0a1628;
}

.product-info-grid article {
  border-color: var(--bio-border);
  background: rgba(10, 22, 40, 0.7);
}

.product-info-grid h3 {
  color: var(--bio-accent);
}

.product-info-grid ul {
  color: #94a3b8;
}

.coa-library-card-header {
  background: rgba(14, 165, 233, 0.06);
  border-color: var(--bio-border);
}

.coa-library-card-header h2 {
  color: var(--white);
}

.coa-report-overlay-button {
  border: 1px solid var(--bio-border);
  background: rgba(10, 22, 40, 0.85);
  color: var(--bio-accent);
  font-family: var(--institute-mono);
  backdrop-filter: blur(8px);
}

.about-hero-video {
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.1);
}

.about-quality-band strong {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
  text-shadow: 0 0 16px rgba(56, 189, 248, 0.3);
}

.about-verification-grid article {
  background: rgba(14, 165, 233, 0.06);
  border: 1px solid var(--bio-border);
}

.support-agent,
.contact-method,
.contact-support-card {
  border: 1px solid var(--bio-border);
  background: rgba(10, 22, 40, 0.6);
}

.support-agent-icon,
.contact-method-icon {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
}

.support-agent-copy strong,
.contact-method strong {
  color: var(--white);
}

.faq-item button {
  color: var(--white);
}

.faq-item button small {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
}

.faq-item b {
  background: rgba(14, 165, 233, 0.12);
  color: var(--bio-accent);
}

.faq-item p {
  color: #94a3b8;
}

.blog-post-meta span,
.blog-post-meta small {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
}

.blog-excerpt {
  color: #cbd5e1;
}

.blog-article-body p {
  color: #cbd5e1;
}

.blog-pagination a,
.blog-pagination span {
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(10, 22, 40, 0.8);
  color: #94a3b8;
  font-family: var(--institute-mono);
}

.blog-pagination span.current {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  border-color: transparent;
  color: #fff;
}

.blog-read-more,
.blog-back-link a {
  color: var(--bio-accent);
}

/* ── Footer ── */
.site-footer {
  background: #030712;
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, transparent, var(--bio-accent), var(--bio-accent2), transparent) 1;
  padding-top: 48px;
}

.site-footer p {
  color: #64748b;
}

.site-footer strong {
  color: var(--white);
}

.footer-trust-notes span,
.footer-trust-notes a {
  border: 1px solid rgba(56, 189, 248, 0.15);
  border-radius: 4px;
  background: rgba(14, 165, 233, 0.06);
  font-family: var(--institute-mono);
  font-size: 11px;
  color: #94a3b8;
}

.footer-trust-notes a:hover {
  border-color: var(--bio-accent);
  color: var(--bio-accent);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.15);
}

.site-footer nav a {
  color: #94a3b8;
}

.site-footer nav a:hover {
  color: var(--bio-accent);
}

.footer-copyright {
  font-family: var(--institute-mono);
  color: #475569;
}

/* ── Modals & cart ── */
.coa-modal,
.cart-drawer,
.floating-support-panel,
.promo-modal {
  background: rgba(10, 22, 40, 0.97);
  border: 1px solid var(--bio-border);
  color: #cbd5e1;
}

.cart-summary {
  border: 1px solid var(--bio-border);
  background: rgba(14, 165, 233, 0.08);
}

.cart-summary strong {
  font-family: var(--institute-mono);
  color: var(--bio-accent);
}

.cart-header h2 {
  color: var(--white);
}

.cart-empty {
  color: #64748b;
}

.coa-modal-header h3 {
  color: var(--white);
}

/* ── Promo ── */
.promo-modal {
  background: rgba(10, 22, 40, 0.98);
}

.promo-brand strong {
  color: var(--white);
}

.promo-modal h2 {
  color: var(--white);
}

.promo-benefits li {
  color: #94a3b8;
}

.promo-benefits li::before {
  color: var(--bio-accent);
}

.promo-form input {
  border-color: var(--bio-border);
  background: rgba(6, 13, 24, 0.8);
  color: var(--white);
}

.promo-trust,
.promo-trustpilot .stars {
  color: var(--bio-accent);
}

/* ── Language switcher ── */
.lang-switcher-toggle {
  border: 1px solid var(--bio-border);
  background: rgba(10, 22, 40, 0.8);
  color: #cbd5e1;
}

.lang-switcher-menu {
  border: 1px solid var(--bio-border);
  background: rgba(10, 22, 40, 0.95);
}

/* ── Misc overrides for light styles.css remnants ── */
.catalog-product-image {
  border-color: var(--bio-border);
  background: radial-gradient(circle at 50% 40%, rgba(56, 189, 248, 0.06), transparent 60%), #0a1628;
}

.catalog-product-image span {
  border-color: rgba(56, 189, 248, 0.2);
  background: rgba(10, 22, 40, 0.8);
  color: var(--bio-accent);
}

.research-use-note {
  color: #64748b;
}

.detail-section-divider,
.spec-divider {
  background: var(--bio-border);
}

.purchase-row,
.purchase-total,
.quantity-row,
.chemical-spec-table div {
  border-color: var(--bio-border);
}

.purchase-panel span,
.spec-choice-block p {
  color: #64748b;
}

.purchase-panel strong,
.unit-price-display b {
  color: var(--white);
}

.action-or {
  color: #64748b;
}

.about-metrics span {
  border-left-color: var(--bio-accent);
  background: rgba(10, 22, 40, 0.6);
  color: #94a3b8;
}

.about-card-link {
  border-color: var(--bio-border);
  background: rgba(10, 22, 40, 0.6);
  color: var(--bio-accent);
  font-family: var(--institute-mono);
}

@media (max-width: 820px) {
  .hero {
    background-image:
      linear-gradient(180deg, rgba(4, 8, 16, 0.88) 0%, rgba(4, 8, 16, 0.65) 50%, rgba(4, 8, 16, 0.92) 100%),
      var(--hero-image, none);
    background-position: center;
    background-size: cover;
    background-color: #040810;
  }

  .hero::before {
    background: linear-gradient(
      180deg,
      rgba(4, 8, 16, 0.55) 0%,
      rgba(4, 8, 16, 0.35) 50%,
      rgba(4, 8, 16, 0.65) 100%
    );
  }

  .hero-stats strong {
    color: var(--bio-accent);
  }

  .nav {
    background: rgba(6, 13, 24, 0.98);
    border-bottom: 1px solid var(--bio-border);
  }

  .nav a {
    color: #94a3b8;
  }
}

/* ── Floating contact stack ── */
.floating-support {
  gap: 10px;
}

.floating-contact,
.floating-whatsapp {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.floating-contact svg,
.floating-whatsapp svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.floating-contact:hover,
.floating-contact:focus-visible,
.floating-whatsapp:hover,
.floating-whatsapp:focus-visible {
  transform: scale(1.06);
  outline: none;
}

.floating-email {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
}

.floating-email:hover,
.floating-email:focus-visible {
  box-shadow: 0 10px 28px rgba(14, 165, 233, 0.5);
}

.floating-telegram {
  background: linear-gradient(135deg, #29b6f6 0%, #039be5 100%);
  box-shadow: 0 8px 24px rgba(3, 155, 229, 0.35);
}

.floating-telegram:hover,
.floating-telegram:focus-visible {
  box-shadow: 0 10px 28px rgba(3, 155, 229, 0.5);
}

.floating-whatsapp {
  background: #25d366;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.35);
}

.floating-whatsapp:hover,
.floating-whatsapp:focus-visible {
  box-shadow: 0 10px 28px rgba(37, 211, 102, 0.5);
}

.floating-contact[hidden],
.floating-whatsapp[hidden] {
  display: none !important;
}

@media (max-width: 820px) {
  .floating-contact,
  .floating-whatsapp {
    width: 46px;
    height: 46px;
  }

  .floating-contact svg,
  .floating-whatsapp svg {
    width: 22px;
    height: 22px;
  }
}

/* ── Country searchable select (contact form) ── */
.country-select {
  position: relative;
  width: 100%;
}

.country-select-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--bio-border);
  border-radius: 4px;
  background: rgba(6, 13, 24, 0.8);
  color: var(--white);
}

.country-select-input::placeholder {
  color: #64748b;
}

.country-select-input:focus {
  border-color: var(--bio-accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15), 0 0 20px rgba(56, 189, 248, 0.1);
  background: rgba(10, 22, 40, 0.9);
  outline: none;
}

.country-select-list {
  position: absolute;
  z-index: 30;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 240px;
  margin: 0;
  padding: 6px 0;
  list-style: none;
  overflow-y: auto;
  border: 1px solid var(--bio-border);
  border-radius: 6px;
  background: rgba(10, 22, 40, 0.98);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

.country-select-option,
.country-select-empty {
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.3;
  color: #e2e8f0;
  cursor: pointer;
}

.country-select-option:hover,
.country-select-option.is-active {
  background: rgba(14, 165, 233, 0.2);
  color: #fff;
}

.country-select-empty {
  color: #64748b;
  cursor: default;
}