/* ==========================================================================
   OTIS - O'zbekiston Texnika va Injenerlik Sahifasi (otis.uz)
   Pure CSS Design System - Performance, Accessibility & Engineering Theme
   ========================================================================== */

:root {
  /* Color Palette - Light Theme (Default) */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-card-hover: #f8fafc;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --border-color: #e2e8f0;
  --border-focus: #0284c7;

  /* Brand Accents */
  --brand-navy: #0f2b48;
  --brand-blue: #0284c7;
  --brand-blue-hover: #0369a1;
  --brand-blue-light: #e0f2fe;
  --accent-amber: #d97706;
  --accent-amber-light: #fef3c7;
  --accent-amber-border: #fcd34d;
  --accent-green: #059669;
  --accent-green-light: #d1fae5;
  --accent-red: #dc2626;
  --accent-red-light: #fee2e2;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Shadows & Elevation */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  /* Spacing & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --container-max: 1200px;
  --header-height: 72px;

  /* Transition */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-primary: #0b1120;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-subtle: #1e293b;
  --bg-card-hover: #1e293b;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --border-color: #334155;
  --border-focus: #38bdf8;

  --brand-navy: #38bdf8;
  --brand-blue: #38bdf8;
  --brand-blue-hover: #7dd3fc;
  --brand-blue-light: rgba(56, 189, 248, 0.15);
  --accent-amber: #fbbf24;
  --accent-amber-light: rgba(251, 191, 36, 0.15);
  --accent-amber-border: #78350f;
  --accent-green: #34d399;
  --accent-green-light: rgba(52, 211, 153, 0.15);
  --accent-red: #f87171;
  --accent-red-light: rgba(248, 113, 113, 0.15);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Blueprint Grid Background Accent */
.grid-bg-overlay {
  background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--brand-blue);
  color: #ffffff;
  padding: 10px 18px;
  z-index: 1000;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
  text-decoration: none;
}

.skip-link:focus {
  top: 15px;
  outline: 3px solid var(--accent-amber);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
}

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .site-header {
  background-color: rgba(15, 23, 42, 0.85);
}

.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Brand Identity */
.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f2b48 0%, #0284c7 100%);
  border-radius: var(--radius-md);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.1;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-tag {
  font-size: 0.65rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
  background-color: var(--brand-blue-light);
  color: var(--brand-blue);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

/* Navigation Links */
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-list {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: var(--brand-blue);
  background-color: var(--bg-subtle);
  text-decoration: none;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-subtle);
  color: var(--brand-blue);
  border-color: var(--border-focus);
}

.btn-icon:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
}

/* ==========================================================================
   Critical Legal Disclaimer Banner (Axborot bildirishnomasi)
   ========================================================================== */
.disclaimer-section {
  padding-top: 24px;
}

.disclaimer-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: var(--accent-amber-light);
  border: 1px solid var(--accent-amber-border);
  border-left: 5px solid var(--accent-amber);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
}

.disclaimer-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  color: var(--accent-amber);
  margin-top: 2px;
}

.disclaimer-content {
  flex: 1;
}

.disclaimer-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent-amber);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.disclaimer-badge {
  font-size: 0.7rem;
  background: var(--accent-amber);
  color: #ffffff;
  padding: 1px 6px;
  border-radius: 4px;
}

.disclaimer-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
}

.disclaimer-subtext {
  font-size: 0.825rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 48px 0 36px 0;
}

.hero-wrapper {
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-subtle) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.hero-wrapper::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  height: 100%;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--brand-blue);
  background-color: var(--brand-blue-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 900px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--brand-blue) 0%, #0369a1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .hero-title .gradient-text {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 820px;
  margin-bottom: 32px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--brand-blue);
}

.stat-label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Live Search & Filter Bar
   ========================================================================== */
.search-section {
  padding: 24px 0 8px 0;
}

.search-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 16px;
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 14px 16px 14px 48px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--brand-blue-light);
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-right: 4px;
}

.filter-pill {
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-pill:hover,
.filter-pill.active {
  background: var(--brand-blue);
  color: #ffffff;
  border-color: var(--brand-blue);
}

/* ==========================================================================
   Section Common Styles
   ========================================================================== */
.content-section {
  padding: 48px 0;
}

.section-header {
  margin-bottom: 32px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand-blue);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 780px;
}

/* Grid Layouts */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.cards-grid-2col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 24px;
}

/* Card Style */
.tech-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
}

.tech-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.card-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 8px;
}

.code-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  color: var(--brand-blue);
  border: 1px solid var(--border-color);
  text-transform: uppercase;
}

.status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.status-active {
  background-color: var(--accent-green-light);
  color: var(--accent-green);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}

.card-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.card-specs {
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 20px;
  font-size: 0.85rem;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
  border-bottom: 1px solid var(--border-color);
}

.spec-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spec-key {
  color: var(--text-muted);
  font-weight: 500;
}

.spec-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section 3: Vertical Transportation & Engineering Spec Sheet
   ========================================================================== */
.feature-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}

.feature-box-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.feature-box-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--brand-blue-light);
  color: var(--brand-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-box-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.feature-box-body p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* Comparison Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.925rem;
}

.tech-table th {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 2px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tech-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-table tr:hover td {
  background-color: var(--bg-card-hover);
}

.table-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--brand-blue-light);
  color: var(--brand-blue);
}

/* ==========================================================================
   Section 4: Fire Safety & Firefighters Operations (Phase 1 & Phase 2)
   ========================================================================== */
.evacuation-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin: 28px 0;
}

.phase-card {
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.phase-card.phase-1 {
  border-top: 4px solid var(--accent-amber);
}

.phase-card.phase-2 {
  border-top: 4px solid var(--accent-red);
}

.phase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.phase-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.phase-1 .phase-number {
  background-color: var(--accent-amber-light);
  color: var(--accent-amber);
}

.phase-2 .phase-number {
  background-color: var(--accent-red-light);
  color: var(--accent-red);
}

.phase-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.phase-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.phase-step-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.step-bullet {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ==========================================================================
   Engineering Glossary (Texnik Lug'at)
   ========================================================================== */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.glossary-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: all var(--transition-fast);
}

.glossary-item:hover {
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
}

.glossary-term {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 800;
  color: var(--brand-blue);
  margin-bottom: 4px;
}

.glossary-def {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-focus);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 22px;
  font-size: 1.05rem;
  font-weight: 700;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-sans);
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--brand-blue);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 22px 20px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 56px 0 28px 0;
  transition: background-color var(--transition-normal);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.6;
  max-width: 380px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.footer-disclaimer-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* Floating Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--brand-blue);
  color: #ffffff;
  border: none;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--brand-blue-hover);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    padding: 16px 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .nav-link {
    padding: 10px 14px;
  }

  .hero-wrapper {
    padding: 28px 20px;
  }

  .cards-grid,
  .cards-grid-2col {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Print Optimization */
@media print {
  .site-header,
  .search-section,
  .back-to-top,
  .theme-toggle,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .tech-card,
  .feature-box,
  .table-responsive {
    box-shadow: none !important;
    border: 1px solid #cccccc !important;
    page-break-inside: avoid;
  }
}