/* ==========================================================================
   InterstateMovingGuide (IMG) - Design System & Modern Transit Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700;800&family=Outfit:wght@500;600;700;800;900&display=swap');

:root {
  /* Color Palette - Modern Transit Dark Mode */
  --bg-primary: #080d1a;
  --bg-surface: #0f172a;
  --bg-elevated: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.75);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Brand Accents */
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;
  
  /* Fonts */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Radii & Shadows */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.25);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.16);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-cyan: #0284c7;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 14px 24px;
}

.header-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--accent-primary);
}

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

.theme-toggle {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background: var(--bg-surface);
  border-color: var(--accent-primary);
}

/* Container */
.main-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 40px 24px;
  flex: 1;
  width: 100%;
}

/* Hero Section */
.hero-section {
  text-align: center;
  margin-bottom: 40px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.badge-primary {
  background: rgba(37, 99, 235, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* Interactive Calculator Rig */
.calculator-rig {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 50px;
  position: relative;
  overflow: hidden;
}

.calculator-rig::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-cyan), var(--accent-emerald));
}

.rig-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}

.form-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.form-select, .form-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14.5px;
  transition: all 0.2s ease;
  outline: none;
}

.form-select:focus, .form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

/* Home Size Selector Cards */
.home-size-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}

.home-size-btn {
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 10px;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.home-size-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.home-size-btn.active {
  background: rgba(37, 99, 235, 0.12);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  font-weight: 700;
}

.home-size-btn .icon {
  font-size: 20px;
}

.home-size-btn .label {
  font-size: 13px;
}

.home-size-btn .sub {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Telemetry & Output Comparison Deck */
.calc-results-deck {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.method-card {
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: left;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.method-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
}

.method-card.featured {
  border-color: var(--accent-primary);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, var(--bg-elevated) 100%);
}

.method-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 4px;
}

.method-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.method-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  min-height: 38px;
}

.price-range {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 8px;
}

.method-card.featured .price-range {
  color: var(--accent-emerald);
}

.price-sub {
  font-size: 12px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
  margin-bottom: 14px;
}

.method-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.method-features li {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Route Distance Bar */
.route-telemetry-bar {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
  font-size: 13.5px;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.telemetry-item span:first-child {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.telemetry-item span:last-child {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 16px;
  color: var(--accent-primary);
}

/* Cards & Grid Layouts */
.section-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Direct Answer Box (AEO) */
.direct-answer-box {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.04));
  border: 1.5px solid rgba(37, 99, 235, 0.4);
  border-left: 6px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 20px 0 28px;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.08);
}

.direct-answer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  margin-bottom: 10px;
}

.direct-answer-text {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  font-weight: 500;
}

.direct-answer-text strong {
  color: #fff;
  background: rgba(37, 99, 235, 0.25);
  padding: 2px 6px;
  border-radius: 4px;
}

[data-theme="light"] .direct-answer-text strong {
  color: #1d4ed8;
  background: rgba(37, 99, 235, 0.15);
}

/* E-E-A-T Verification Bar */
.eeat-badge-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 12.5px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14.5px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-surface);
  border-color: var(--accent-primary);
}

/* Footer */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 24px 24px;
  margin-top: auto;
}

.footer-grid {
  max-width: 1240px;
  margin: 0 auto 36px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}

@media (max-width: 880px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 13.5px;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  max-width: 1240px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* Enhanced SEO & E-E-A-T Modules */
.tax-diff-card {
  background: linear-gradient(135deg, rgba(16,185,129,0.08) 0%, rgba(6,182,212,0.05) 100%);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin-bottom: 32px;
}
.tax-diff-card.neutral {
  background: var(--bg-surface);
  border-color: var(--border-subtle);
}
.savings-metric-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}
.savings-metric-val {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 800;
  color: var(--accent-emerald);
  margin-top: 4px;
}
.corridor-telemetry-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin-bottom: 32px;
}
.highway-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}
.fmcsa-audit-box {
  background: linear-gradient(135deg, rgba(37,99,235,0.06) 0%, rgba(245,158,11,0.05) 100%);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin-bottom: 32px;
}
.step-flow-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.step-flow-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  position: relative;
}
.step-flow-number {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  color: var(--accent-primary);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.cab-card-container {
  background: var(--bg-surface);
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 28px;
  margin-bottom: 36px;
}

/* Print Stylesheet */
@media print {
  body {
    background: #fff !important;
    color: #000 !important;
  }
  .header, .footer, .theme-toggle, .btn, .breadcrumb, button, .header-actions {
    display: none !important;
  }
  .main-container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .calculator-rig, .method-card, .direct-answer-box, .tax-diff-card, .corridor-telemetry-box, .fmcsa-audit-box, .cab-card-container {
    border: 1px solid #777 !important;
    background: #fff !important;
    color: #000 !important;
    box-shadow: none !important;
    break-inside: avoid;
  }
  .savings-metric-val, .metric-value, .price-range {
    color: #000 !important;
  }
}