/* BeiLuo Distributor Website — Design System & Base Styles */

/* Google Fonts: Inter 300-700 (design.md §6.2; PRD §9.3) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --color-primary: #0072ce;
  --color-on-primary: #FFFFFF;
  --color-secondary: #4A5568;
  --color-accent: #ff6b00;
  --color-background: #F5F7FA;
  --color-foreground: #1A202C;
  --color-muted: #EDF2F7;
  --color-border: #E2E8F0;
  --color-destructive: #DC2626;
  --color-success: #22C55E;
  --color-warning: #F97316;
  --color-ring: #0072ce;
  --color-on-accent: #1A202C;
  --color-accent-text: #c2410c;
  --color-muted-strong: #718096;
  --color-text: #1A202C;
  --color-surface-alt: #EDF2F7;

  /* Typography */
  --font-family: 'Inter', system-ui, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

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

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  background-color: var(--color-background);
  color: var(--color-foreground);
  line-height: 1.6;
}

/* ============================================================
   2. Components (design.md §2)
   ============================================================ */

/* 2.1 Buttons */

/* Primary Button (Orange) */
.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  transition: all 200ms ease;
}
.btn-primary:hover {
  filter: brightness(0.92);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  transform: translateY(0);
}

/* Secondary Button (Blue Outline) */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 500;
  transition: all 200ms ease;
}
.btn-secondary:hover {
  background-color: rgba(0, 114, 206, 0.1);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-accent-text);
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 500;
  transition: all 200ms ease;
}
.btn-ghost:hover {
  background-color: rgba(255, 107, 0, 0.1);
}

/* Stock Status Label */
.stock-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.stock-badge.available {
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
}
.stock-badge.request {
  background-color: rgba(249, 115, 22, 0.1);
  color: var(--color-warning);
}

/* 2.2 Cards */

/* Product / Solution / News Card */
.product-card,
.solution-card,
.news-card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  transition: all 250ms ease;
}
.product-card:hover,
.solution-card:hover,
.news-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* Category Card */
.category-card {
  background-color: var(--color-muted);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  transition: all 250ms ease;
}
.category-card:hover {
  background-color: rgba(0, 114, 206, 0.1);
  transform: translateY(-4px);
}

/* 2.3 Navigation */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: max(16px, env(safe-area-inset-top, 0px)) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-foreground);
}
.logo-mark {
  font-size: 30px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: -0.5px;
}
.logo-text {
  font-size: 13px;
  font-weight: var(--font-weight-medium);
  color: var(--color-secondary);
}

/* Mobile menu toggle (checkbox hidden with sr-only pattern) */
.mobile-menu-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.mobile-menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  cursor: pointer;
}
.mobile-menu-toggle:focus ~ .mobile-menu-btn {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
}
.mobile-menu-icon,
.mobile-menu-icon::before,
.mobile-menu-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-foreground);
  border-radius: 2px;
  position: relative;
}
.mobile-menu-icon::before,
.mobile-menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
}
.mobile-menu-icon::before {
  top: -7px;
}
.mobile-menu-icon::after {
  top: 7px;
}

/* Mobile Menu (CSS-only) */
#mobile-menu-toggle:checked ~ .mobile-menu {
  display: block;
}
.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

/* Desktop: show inline navigation, hide hamburger */
@media (min-width: 768px) {
  .mobile-menu-btn,
  .mobile-menu-toggle {
    display: none;
  }
  .mobile-menu {
    display: flex;
    position: static;
    border-bottom: none;
    flex: 1;
    justify-content: flex-end;
  }
}

/* 2.4 Forms */

/* Input Field */
.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-size: 16px;
  transition: all 200ms ease;
}
.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
}
.form-input.error {
  border-color: var(--color-destructive);
}
.form-input.success {
  border-color: var(--color-success);
}

/* 2.5 Tables */

/* Data / Spec Table */
.data-table,
.spec-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table th,
.spec-table th {
  background-color: var(--color-muted);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}
.data-table td,
.spec-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}
.data-table tr:hover,
.spec-table tr:hover {
  background-color: rgba(0, 114, 206, 0.05);
}

/* 2.6 Tabs (CSS-only) */

/* Tab Navigation (Radio Checked Hack) */
.tab-group,
.tab-container {
  display: flex;
  border-bottom: 2px solid var(--color-border);
}
.tab-item {
  padding: 12px 24px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-weight: 500;
  transition: all 200ms ease;
}
.tab-item:hover {
  color: var(--color-accent-text);
}
.tab-radio {
  display: none;
}
.tab-radio:checked + .tab-item {
  color: var(--color-accent-text);
  border-bottom-color: var(--color-accent);
}
.tab-content {
  display: none;
  padding: 24px 0;
}
.tab-radio:checked ~ .tab-content {
  display: block;
}

/* 2.7 Accordion (CSS-only) */

.accordion-item {
  border-bottom: 1px solid var(--color-border);
}
.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  cursor: pointer;
  font-weight: 600;
}
.accordion-radio {
  display: none;
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}
.accordion-radio:checked ~ .accordion-content {
  max-height: 500px;
}
.accordion-radio:checked ~ .accordion-header .accordion-arrow {
  transform: rotate(180deg);
}

/* 2.8 Breadcrumbs */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  max-width: 1319px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md) 0;
  color: var(--color-secondary);
  font-size: 13px;
  line-height: 1.4;
}
@media (min-width: 1200px) {
  .breadcrumbs {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}
.breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
}
.breadcrumbs a:hover {
  text-decoration: underline;
}
.breadcrumbs .separator {
  color: var(--color-muted-strong);
}
.breadcrumbs .current,
.breadcrumbs [aria-current="page"] {
  color: var(--color-foreground);
  font-weight: 500;
}

/* 2.9 Search Bar */

.search-bar {
  display: flex;
  align-items: center;
  background-color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 12px;
  transition: all 200ms ease;
}
.search-bar:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
}
.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 14px;
  color: var(--color-foreground);
}
.search-input::placeholder {
  color: var(--color-secondary);
}
.search-button {
  background: none;
  border: none;
  color: var(--color-secondary);
  cursor: pointer;
  padding: 4px;
}
.search-button:hover {
  color: var(--color-accent-text);
}

/* 2.10 Code Block */

.code-block {
  background-color: #1A202C;
  color: #E2E8F0;
  padding: 16px;
  border-radius: 8px;
  font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
  font-size: 14px;
  line-height: 1.6;
  overflow-x: auto;
}
.code-block pre {
  margin: 0;
  white-space: pre;
}

/* 2.11 Blockquote */

.blockquote {
  border-left: 4px solid var(--color-accent);
  padding: 16px 24px;
  margin: 16px 0;
  background-color: var(--color-muted);
  border-radius: 0 8px 8px 0;
}
.blockquote p {
  margin: 0;
  color: var(--color-secondary);
  font-style: italic;
}
.blockquote cite {
  display: block;
  margin-top: 8px;
  font-style: normal;
  font-size: 14px;
  color: var(--color-foreground);
}

/* 2.12 Timeline */

.timeline {
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border);
}
.timeline-item {
  position: relative;
  margin-bottom: 24px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 3px solid var(--color-background);
}
.timeline-year {
  font-weight: 700;
  color: var(--color-primary);
}
.timeline-title {
  font-weight: 600;
  color: var(--color-foreground);
}
.timeline-description {
  color: var(--color-secondary);
  font-size: 14px;
}

/* 2.13 Skip Link */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  padding: 8px 16px;
  border-radius: 4px;
  z-index: 1000;
  transition: top 200ms ease;
}
.skip-link:focus {
  top: 0;
}

/* ============================================================
   3. Additional Required Classes (PRD §3.7)
   ============================================================ */

/* Hero Banner */
.hero-banner {
  width: 100%;
  background: linear-gradient(135deg, var(--color-primary), rgba(0, 114, 206, 0.98));
  color: var(--color-on-primary);
}

/* Sticky Sidebar */
.sticky-sidebar {
  position: sticky;
  top: var(--spacing-lg);
}

/* Article Content */
.article-content {
  max-width: 800px;
  color: var(--color-secondary);
  font-size: 16px;
  line-height: 1.8;
}

/* ============================================================
   4. Responsive Layout System (PRD §3.8; design.md §1.8)
   ============================================================ */

/* 12-column CSS Grid container */
.container {
  max-width: 1319px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-lg);
}

/* Header layout */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-item a {
  text-decoration: none;
  color: var(--color-foreground);
  font-weight: 500;
}
.nav-item a:hover {
  color: var(--color-primary);
}
.nav-item-has-children {
  position: relative;
}
.sub-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}
.nav-item-has-children:hover .sub-nav,
.nav-item-has-children:focus-within .sub-nav {
  display: block;
}
.sub-nav a {
  display: block;
  padding: 10px 16px;
}

/* Product grid: one column on mobile, two columns from tablet */
.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}
@media (min-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Support detail layout: sidebar below content on mobile */
.support-detail-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}
@media (min-width: 768px) {
  .support-detail-layout {
    grid-template-columns: 1fr 300px;
  }
}

/* Mobile: < 768px */
@media (max-width: 767px) {
  .nav-list {
    flex-direction: column;
    align-items: stretch;
  }
  .nav-item-has-children {
    position: static;
  }
  .sub-nav {
    display: block;
    position: static;
    min-width: 0;
    box-shadow: none;
    border: none;
    padding-left: var(--spacing-md);
  }
  .nav-item a,
  .search-button,
  .mobile-menu-btn {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .search-bar {
    width: 100%;
  }
}

/* Desktop: >= 1200px */
@media (min-width: 1200px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

/* ============================================================
   Homepage Layout (design.md §3.1)
   ============================================================ */

.section {
  padding: var(--spacing-3xl) 0;
}
.section-title {
  font-size: 28px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xl);
}

/* Hero: image above content on mobile, two-column on desktop */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  padding: var(--spacing-2xl) 0;
}
@media (min-width: 768px) {
  .hero-layout {
    grid-template-columns: 1fr 1fr;
  }
}
.hero-copy h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
}
.hero-badge {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}
.hero-subtitle {
  font-size: 17px;
  margin-bottom: var(--spacing-lg);
  color: var(--color-on-primary);
}
.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Trust badges */
.trust-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}
@media (min-width: 768px) {
  .trust-list {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1200px) {
  .trust-list {
    grid-template-columns: repeat(5, 1fr);
  }
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-xs);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
}
.trust-label {
  font-weight: var(--font-weight-semibold);
}
.trust-text {
  font-size: 13px;
  color: var(--color-secondary);
}

/* Generic responsive grids */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}
@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}
.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}
@media (min-width: 768px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Category card */
a.category-card {
  text-decoration: none;
  color: var(--color-foreground);
}
.category-icon {
  margin-bottom: var(--spacing-md);
}
.category-name {
  font-size: 18px;
  margin-bottom: var(--spacing-sm);
}
.category-summary {
  font-size: 14px;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.category-count {
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

/* Why choose us */
.why-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
}
.why-icon {
  display: block;
  margin: 0 auto var(--spacing-sm);
}
.card-icon {
  display: block;
  width: 40px;
  height: 40px;
  margin: 0 auto var(--spacing-sm);
}
.why-title {
  font-size: 17px;
  margin-bottom: var(--spacing-xs);
}
.why-text {
  font-size: 14px;
  color: var(--color-secondary);
}

/* Generic card text */
.card-title {
  font-size: 18px;
  margin: var(--spacing-sm) 0;
}
.card-title a {
  text-decoration: none;
  color: var(--color-foreground);
}
.card-title a:hover {
  color: var(--color-primary);
}
.card-text {
  font-size: 14px;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-link {
  font-size: 14px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-decoration: none;
}
.card-category {
  display: inline-block;
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-xs);
}
.card-meta {
  font-size: 13px;
  color: var(--color-secondary);
}
.card-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
}

/* Final CTA */
.cta-box {
  background: linear-gradient(135deg, var(--color-primary), rgba(0, 114, 206, 0.98));
  color: var(--color-on-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
}
.cta-headline {
  font-size: 26px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}
.cta-text {
  color: var(--color-on-primary);
  max-width: 640px;
  margin: 0 auto var(--spacing-lg);
}

/* ============================================================
   Listing Pages (design.md §3.2, §3.5, §3.7, §3.9, §3.10)
   ============================================================ */

.page-head {
  background: linear-gradient(135deg, rgba(0, 114, 206, 0.1), rgba(0, 114, 206, 0.02));
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0;
}
.page-head h1 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
}
.page-intro {
  font-size: 16px;
  color: var(--color-secondary);
  max-width: 760px;
}
.page-intro-clamp {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}
@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.category-detail-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
}
.category-card-head {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}
.category-title {
  font-size: 22px;
  font-weight: var(--font-weight-semibold);
}
.category-tagline {
  font-size: 13px;
  color: var(--color-secondary);
}
.category-params-label {
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  margin: var(--spacing-md) 0 var(--spacing-xs);
}
.category-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-top: auto;
  padding-top: var(--spacing-lg);
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-xs);
}
.check-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--color-foreground);
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-success);
}

.chip-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}
.chip {
  background-color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 13px;
}
.chip a {
  color: var(--color-primary);
  text-decoration: none;
}
.chip a:hover {
  text-decoration: underline;
}

/* Category pages (design.md §3.3) */
.layout-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-xl);
}
@media (min-width: 1000px) {
  .layout-sidebar {
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: start;
  }
}
.layout-aside {
  order: -1;
}
@media (min-width: 1000px) {
  .layout-aside {
    position: sticky;
    top: var(--spacing-lg);
    order: 0;
  }
}
.sidebar-nav {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}
.sidebar-title {
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}
.sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-xs);
}
.sidebar-nav a {
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 14px;
}
.sidebar-nav a:hover,
.sidebar-nav a.is-active {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: #ffffff;
}
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.spec-table th,
.spec-table td {
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.spec-table thead th {
  background-color: var(--color-muted);
  font-weight: var(--font-weight-semibold);
}
.spec-table tbody tr:last-child td {
  border-bottom: none;
}
.spec-table a {
  color: var(--color-primary);
  text-decoration: none;
}
.spec-table a:hover {
  text-decoration: underline;
}

.faq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  align-items: start;
}
@media (min-width: 768px) {
  .faq-list {
    grid-template-columns: repeat(2, 1fr);
  }
}
.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-md);
}
.faq-item[open] {
  border-color: var(--color-primary);
}
.faq-item summary {
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  padding: var(--spacing-xs) 0;
  list-style: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  float: right;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}
.faq-item[open] summary::after {
  content: '\2212';
}
.faq-answer {
  color: var(--color-secondary);
  font-size: 14px;
  line-height: 1.7;
  padding: var(--spacing-xs) 0 var(--spacing-sm);
}
.faq-answer p {
  margin: 0 0 var(--spacing-sm);
}
.faq-answer p:last-child {
  margin-bottom: 0;
}
.faq-guide {
  margin-top: var(--spacing-xs);
}
.faq-guide a {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
}
.faq-guide a::after {
  content: ' \2192';
}
.faq-guide a:hover {
  text-decoration: underline;
}
.faq-item p {
  margin-top: var(--spacing-xs);
  color: var(--color-secondary);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}
.btn-secondary {
  background-color: #ffffff;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-secondary:hover {
  background-color: var(--color-muted);
}

/* Article layout (support detail) */
.layout-article {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}
.article-main {
  max-width: 800px;
}
.article-main .article-body {
  margin-top: 0;
}
@media (min-width: 1000px) {
  .layout-article {
    grid-template-columns: 1fr 300px;
    align-items: start;
  }
  .article-aside {
    position: sticky;
    top: 100px;
  }
}
.author-line {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-right: var(--spacing-md);
}
.author-line a {
  color: var(--color-primary);
  text-decoration: none;
}
.toc-list {
  list-style: none;
}
.toc-list li {
  margin-bottom: var(--spacing-xs);
}
.toc-list a {
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 14px;
}
.toc-list a:hover {
  color: var(--color-primary);
}
.toc-2 a {
  font-weight: var(--font-weight-medium);
}
.toc-3 a {
  padding-left: var(--spacing-md);
}

/* News banner + share (news detail) */
.news-banner {
  background: linear-gradient(135deg, rgba(0, 114, 206, 0.1), rgba(0, 114, 206, 0.02));
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0;
}
.news-banner-inner {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}
.news-banner-cover {
  width: 220px;
  height: auto;
  border-radius: var(--radius-md);
}
.news-banner-text h1 {
  margin: var(--spacing-xs) 0 var(--spacing-sm);
}
.share-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}
.share-label {
  font-weight: var(--font-weight-medium);
  color: var(--color-secondary);
}
.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-muted);
  color: var(--color-secondary);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.share-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}
.sidebar-date {
  display: block;
  font-size: 12px;
  color: var(--color-muted-strong);
}

/* Author profile (support author page) */
.author-profile {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}
@media (max-width: 640px) {
  .author-profile {
    grid-template-columns: 1fr;
  }
}
.author-avatar-frame {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  border: 3px solid var(--color-primary);
  overflow: hidden;
  background-color: #ffffff;
}
.author-avatar-frame img {
  display: block;
  width: 100%;
  height: 100%;
}
.author-details h1 {
  margin-bottom: var(--spacing-xs);
}
.author-years {
  font-size: 14px;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
}
.author-bio {
  margin: var(--spacing-md) 0;
}
.author-contact a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

/* Tag cloud (support tag page) */
.tag-cloud {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}
.tag-chip {
  display: inline-block;
  text-decoration: none;
  background-color: #ffffff;
}
.tag-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Block diagram frame (solution detail) */
.diagram-frame {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-x: auto;
}
.diagram-frame img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}

/* Article body (solution/support detail) */
.article-body {
  margin-top: var(--spacing-xl);
  color: var(--color-foreground);
  line-height: 1.8;
}
.article-body > h2 {
  font-size: 22px;
  font-weight: var(--font-weight-semibold);
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-md);
  margin: var(--spacing-xl) 0 var(--spacing-md);
}
.article-body > h3 {
  font-size: 18px;
  font-weight: var(--font-weight-semibold);
  border-left: 4px solid var(--color-muted-strong);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}
.article-body p {
  margin: 0 0 24px;
}
.article-body ul,
.article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}
.article-body pre {
  background-color: #f1f5f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
  font-size: 13px;
}
.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-muted);
  padding: var(--spacing-sm) var(--spacing-lg);
  margin: 0 0 24px;
  color: var(--color-secondary);
}

/* Product detail hero */
.product-hero {
  background: linear-gradient(135deg, rgba(0, 114, 206, 0.1), rgba(0, 114, 206, 0.02));
  border-bottom: 1px solid var(--color-border);
}
.hero-product {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-xl);
  align-items: center;
}
@media (min-width: 768px) {
  .hero-product {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  }
}
.product-visual {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}
.product-gallery-hint {
  display: flex;
  gap: var(--spacing-xs);
}
.thumb {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-muted);
}
.thumb-active {
  border-color: var(--color-primary);
}
.product-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  align-items: center;
  margin: var(--spacing-sm) 0;
}
.stock-badge {
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  border-radius: 12px;
  padding: 3px 10px;
}
.stock-badge.in-stock {
  color: #15803d;
  background-color: #dcfce7;
}
.stock-badge.on-request {
  color: #c2410c;
  background-color: #ffedd5;
}
.product-description {
  color: var(--color-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* FAE review block */
.fae-review {
  background-color: var(--color-muted);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg) var(--spacing-xl);
  margin-top: var(--spacing-lg);
}
.fae-review blockquote {
  margin: var(--spacing-xs) 0 0 0;
  color: var(--color-secondary);
  line-height: 1.7;
}

/* Application cards */
.app-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

/* Table action link */
.table-action {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

/* Sidebar boxes */
.sidebar-box {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}
.sidebar-title {
  font-size: 16px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}
.sidebar-text {
  font-size: 14px;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
}
.btn-block {
  display: block;
  text-align: center;
}

/* Nav cards (about landing) */
.nav-card {
  display: flex;
  flex-direction: column;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-decoration: none;
  color: var(--color-foreground);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.nav-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.nav-card-title {
  font-size: 17px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}
.nav-card-text {
  font-size: 14px;
  color: var(--color-secondary);
  flex-grow: 1;
  margin-bottom: var(--spacing-md);
}
.nav-card-cta {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* Prose blocks */
.prose {
  max-width: 760px;
  color: var(--color-secondary);
  line-height: 1.7;
}

/* About overview two-column layout (text + illustration) */
.overview-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}
@media (min-width: 900px) {
  .overview-layout {
    grid-template-columns: 1.5fr 1fr;
  }
}
.overview-copy .prose {
  max-width: none;
}
.overview-media {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}
.overview-media img {
  display: block;
  width: 100%;
  height: auto;
}

/* Document list (about landing) */
.doc-list {
  list-style: none;
  display: grid;
  gap: var(--spacing-md);
}
.doc-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
}
.doc-icon {
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 1px;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 4px;
  padding: 2px 6px;
}
.doc-label {
  flex-grow: 1;
  font-weight: var(--font-weight-medium);
}
.doc-link {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}
/* 2/3-column documentation card grids */
.doc-list.doc-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}
.doc-list.doc-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
.doc-list.doc-grid-2 .doc-item,
.doc-list.doc-grid-3 .doc-item {
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}
@media (max-width: 900px) {
  .doc-list.doc-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .doc-list.doc-grid-2,
  .doc-list.doc-grid-3 {
    grid-template-columns: 1fr;
  }
}

/* CSS-only tabs (support listing, news listing) */
.tabs input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.tabs input[type="radio"]:focus ~ label {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
}
.tab-label {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  margin: 0 var(--spacing-xs) var(--spacing-sm) 0;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background-color: #ffffff;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  color: var(--color-secondary);
}
.tab-count {
  font-size: 12px;
  color: var(--color-muted-strong);
}
.tab-label:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
#tab-guides:checked ~ label[for="tab-guides"],
#tab-appnotes:checked ~ label[for="tab-appnotes"],
#tab-troubleshooting:checked ~ label[for="tab-troubleshooting"],
#tab-reviews:checked ~ label[for="tab-reviews"],
#tab-company:checked ~ label[for="tab-company"],
#tab-trends:checked ~ label[for="tab-trends"],
#tab-overview:checked ~ label[for="tab-overview"],
#tab-specs:checked ~ label[for="tab-specs"],
#tab-circuit:checked ~ label[for="tab-circuit"],
#tab-docs:checked ~ label[for="tab-docs"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-on-primary);
}
#tab-guides:checked ~ #panel-guides,
#tab-appnotes:checked ~ #panel-appnotes,
#tab-troubleshooting:checked ~ #panel-troubleshooting,
#tab-reviews:checked ~ #panel-reviews,
#tab-company:checked ~ #panel-company,
#tab-trends:checked ~ #panel-trends,
#tab-overview:checked ~ #panel-overview,
#tab-specs:checked ~ #panel-specs,
#tab-circuit:checked ~ #panel-circuit,
#tab-docs:checked ~ #panel-docs {
  display: block;
}
.tab-panel {
  display: none;
  margin-top: var(--spacing-lg);
}
.tab-empty {
  color: var(--color-secondary);
}

/* Article cards (support listing) */
.article-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}
.article-title {
  font-size: 19px;
  font-weight: var(--font-weight-semibold);
}
.article-title a {
  color: var(--color-foreground);
  text-decoration: none;
}
.article-title a:hover {
  color: var(--color-primary);
}
.article-meta {
  font-size: 13px;
  color: var(--color-secondary);
  margin: var(--spacing-xs) 0;
}
.article-meta a {
  color: var(--color-primary);
  text-decoration: none;
}
.article-excerpt {
  color: var(--color-secondary);
  margin: var(--spacing-sm) 0;
}
.article-read a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}

/* FAE author cards (support listing) */
.author-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
}
.author-avatar {
  border-radius: 50%;
  margin-bottom: var(--spacing-sm);
}
.author-name {
  font-size: 17px;
  font-weight: var(--font-weight-semibold);
}
.author-name a {
  color: var(--color-foreground);
  text-decoration: none;
}
.author-name a:hover {
  color: var(--color-primary);
}
.author-role {
  font-size: 13px;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}
.author-expertise {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

/* ============================================================
   5. Accessibility & Performance
   ============================================================ */

/* Keyboard navigation: visible focus ring (design.md §5.2) */
:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
}

/* Respect reduced-motion preference (design.md §4.2) */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Prevent CLS: stable dimensions on SVG/image containers (design.md §6) */
svg {
  display: block;
  max-width: 100%;
  height: auto;
}
.hero-illustration {
  aspect-ratio: 4 / 3;
}
.card-cover svg {
  aspect-ratio: 16 / 9;
}

/* ============================================================
   8. Phase 6: About subpages, legal & 404 components
   ============================================================ */

/* Shared: visually hidden label */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Company profile */
.profile-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}
@media (max-width: 640px) {
  .profile-grid {
    grid-template-columns: 1fr;
  }
}
.profile-logo {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fact-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}
.fact-item dt {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted-strong);
}
.fact-item dd {
  font-weight: var(--font-weight-semibold);
  margin: 0;
}
.timeline {
  list-style: none;
  position: relative;
  padding-left: var(--spacing-lg);
  border-left: 2px solid var(--color-primary);
}
.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-md);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-lg) - 5px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-primary);
}
.timeline-year {
  display: inline-block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-xs);
}
.timeline-event {
  margin: 0;
  color: var(--color-muted-strong);
}
.value-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  background-color: #ffffff;
}
.value-card-title {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}
.value-card-text {
  margin: 0;
  font-size: 14px;
  color: var(--color-muted-strong);
}
.doc-meta {
  color: var(--color-muted-strong);
  font-size: 13px;
}

/* Advantages */
.advantage-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  background-color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.advantage-icon {
  display: block;
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-sm);
}
.advantage-title {
  margin-bottom: var(--spacing-xs);
}
.advantage-text {
  flex-grow: 1;
  font-size: 14px;
  color: var(--color-muted-strong);
  margin: 0 0 var(--spacing-sm);
}
.advantage-metric {
  align-self: center;
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  padding: 2px 10px;
}
.stats-section {
  background-color: var(--color-surface-alt);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}
@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.stat-card {
  text-align: center;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #ffffff;
}
.stat-value {
  display: block;
  font-size: 32px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}
.stat-label {
  font-size: 13px;
  color: var(--color-muted-strong);
}

/* Customers */
.logo-mosaic {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-sm);
}
@media (max-width: 768px) {
  .logo-mosaic {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 480px) {
  .logo-mosaic {
    grid-template-columns: repeat(2, 1fr);
  }
}
.logo-tile {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  background-color: #ffffff;
}
.logo-name {
  display: block;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}
.logo-industry {
  font-size: 12px;
  color: var(--color-muted-strong);
}
.testimonial-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: 0;
  background-color: #ffffff;
  display: flex;
  flex-direction: column;
}
.testimonial-quote {
  flex-grow: 1;
  font-size: 14px;
  color: var(--color-muted-strong);
  margin: 0 0 var(--spacing-md);
}
.testimonial-name {
  display: block;
  font-weight: var(--font-weight-semibold);
}
.testimonial-title {
  font-size: 13px;
  color: var(--color-muted-strong);
}

/* Contact */
.contact-layout-inner {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--spacing-lg);
  align-items: start;
}
@media (max-width: 900px) {
  .contact-layout-inner {
    grid-template-columns: 1fr;
  }
}
.map-figure {
  margin: 0 0 var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  background-color: #ffffff;
}
.office-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}
@media (max-width: 640px) {
  .office-grid {
    grid-template-columns: 1fr;
  }
}
.office-group {
  break-inside: avoid;
}
.office-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background-color: #ffffff;
}
.office-name {
  font-size: 15px;
  margin-bottom: 2px;
}
.office-city {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-xs);
}
.office-address {
  font-style: normal;
  font-size: 13px;
  color: var(--color-muted-strong);
  margin-bottom: var(--spacing-xs);
}
.office-email {
  font-size: 13px;
  color: var(--color-primary);
  text-decoration: none;
}
.office-email:hover {
  text-decoration: underline;
}
.contact-sidebar {
  position: sticky;
  top: 100px;
}
.sidebar-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  background-color: #ffffff;
}
.sidebar-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xs);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  font-size: 13px;
  white-space: nowrap;
  color: var(--color-text);
  text-decoration: none;
}
.cta-label {
  color: var(--color-secondary);
  font-weight: var(--font-weight-medium);
}
.cta-value {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}
.sidebar-cta:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.contact-form {
  max-width: 640px;
}
.form-row {
  margin-bottom: var(--spacing-md);
}
.form-row label {
  display: block;
  font-weight: var(--font-weight-medium);
  font-size: 14px;
  margin-bottom: 4px;
}
.form-row input,
.form-row textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  background-color: #ffffff;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

/* Legal */
.legal-prose h2 {
  margin-top: var(--spacing-lg);
}

/* 404 */
.error-hero {
  text-align: center;
}
.error-code {
  display: block;
  font-size: 96px;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
}
.error-text {
  max-width: 520px;
  margin: var(--spacing-sm) auto var(--spacing-md);
  color: var(--color-muted-strong);
}
.error-search {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: center;
  max-width: 480px;
  margin: 0 auto var(--spacing-md);
}
.error-search input {
  flex-grow: 1;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
}
.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
}
.error-links a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
}
.error-links a:hover {
  text-decoration: underline;
}

/* Footer (Phase 0.3 partial) */
.footer {
  background-color: var(--color-foreground);
  color: #CBD5E0;
  padding: 40px 0 32px;
  margin-top: 64px;
  padding-bottom: max(32px, env(safe-area-inset-bottom, 0px));
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}
.footer-tagline {
  color: #A0AEC0;
  font-size: 14px;
  font-weight: var(--font-weight-medium);
}
.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  list-style: none;
  padding: 0;
}
.footer-nav a {
  color: #E2E8F0;
  font-size: 14px;
  text-decoration: none;
  transition: color 200ms ease;
}
.footer-nav a:hover {
  color: var(--color-accent);
}
.footer-copyright {
  color: #A0AEC0;
  font-size: 12px;
}

/* Sitemap page (design.md 3.20) */
.sitemap-grid {
  gap: var(--spacing-xl);
}
.sitemap-col {
  background-color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}
.sitemap-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.sitemap-list a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
}
.sitemap-list a:hover {
  text-decoration: underline;
}