/* ========================================
   GREEN ROILAB - Premium 2026 Design System
   Ultra-Modern Energy Calculators Platform
   ======================================== */

/* === CSS VARIABLES === */
:root {
  /* Colors - Light Mode */
  --primary: #00C853;
  --primary-dark: #00A844;
  --primary-light: #69FF6B;
  --secondary: #00B0FF;
  --secondary-dark: #0091EA;
  --accent: #76FF03;
  --accent-purple: #B388FF;
  --accent-orange: #FF9100;
  
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F7FA;
  --bg-tertiary: #E8EDF2;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.7);
  
  --text-primary: #0A1628;
  --text-secondary: #3A4A5C;
  --text-tertiary: #6B7A8D;
  --text-inverse: #FFFFFF;
  
  --border: rgba(0, 0, 0, 0.08);
  --border-light: rgba(0, 0, 0, 0.04);
  
  --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-xl: 0 24px 64px rgba(0, 0, 0, 0.16);
  --shadow-glow: 0 0 40px rgba(0, 200, 83, 0.3);
  
  --gradient-primary: linear-gradient(135deg, #00C853 0%, #00B0FF 100%);
  --gradient-hero: linear-gradient(135deg, #0A1628 0%, #1A2B4A 50%, #0D3B2A 100%);
  --gradient-card: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
  --gradient-accent: linear-gradient(135deg, #76FF03 0%, #00C853 50%, #00B0FF 100%);
  --gradient-dark: linear-gradient(135deg, #0A1628 0%, #1A2B4A 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 2.5rem;
  --spacing-3xl: 3rem;
  --spacing-4xl: 4rem;
  --spacing-5xl: 5rem;
  --spacing-6xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 600ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-max: 1440px;
  --container-wide: 1600px;
  --header-height: 80px;
}

/* === DARK MODE === */
[data-theme="dark"] {
  --bg-primary: #0A1628;
  --bg-secondary: #111D33;
  --bg-tertiary: #1A2B4A;
  --bg-card: rgba(26, 43, 74, 0.85);
  --bg-glass: rgba(26, 43, 74, 0.7);
  
  --text-primary: #F5F7FA;
  --text-secondary: #C8D6E5;
  --text-tertiary: #8A9BAE;
  
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.04);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px rgba(0, 200, 83, 0.4);
}

/* === RESET & BASE === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* === MOBILE IMPROVEMENTS === */
* {
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition-slow), color var(--transition-slow);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* === UTILITY CLASSES === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

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

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-blue {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === GLASSMORPHISM CARD === */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 14px 28px;
  font-weight: 600;
  font-size: var(--text-base);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(0, 200, 83, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 200, 83, 0.4);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 18px 36px;
  font-size: var(--text-lg);
}

.btn-sm {
  padding: 10px 20px;
  font-size: var(--text-sm);
}

.btn-block {
  width: 100%;
}

/* === SECTION STYLES === */
.section {
  padding: var(--spacing-6xl) 0;
  position: relative;
}

.section-sm {
  padding: var(--spacing-4xl) 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-4xl);
}

.section-label {
  display: inline-block;
  padding: 6px 16px;
  background: var(--gradient-primary);
  color: white;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === NAVBAR === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--text-primary);
}

.navbar-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.navbar-link {
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--text-base);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--primary);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  width: 100%;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  transition: all var(--transition-base);
  cursor: pointer;
}

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  padding: var(--spacing-2xl);
  z-index: 999;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu .navbar-link {
  font-size: var(--text-xl);
  padding: var(--spacing-md) 0;
}

.mobile-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
  padding-bottom: var(--spacing-4xl);
  background:
    linear-gradient(105deg, rgba(10, 22, 40, 0.82) 0%, rgba(10, 22, 40, 0.65) 35%, rgba(13, 59, 42, 0.45) 60%, rgba(0, 176, 255, 0.25) 100%),
    url('../blog/IMG/hero-background.jpg') center center / cover no-repeat;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 15% 40%, rgba(0, 200, 83, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 60%, rgba(0, 176, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(118, 255, 3, 0.06) 0%, transparent 40%);
  animation: heroGlow 10s ease-in-out infinite alternate;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  z-index: 1;
  pointer-events: none;
}

@keyframes heroGlow {
  0% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
  100% { opacity: 0.7; transform: scale(1.01); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-5xl);
  align-items: center;
  position: relative;
  z-index: 2;
  width: 100%;
}

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

.hero-centered {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-centered .hero-subtitle {
  margin-left: auto;
  margin-right: auto;
}

.hero-centered .hero-buttons {
  justify-content: center;
}

.hero-centered .hero-stats {
  justify-content: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
}

.hero-badge .badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, var(--text-6xl));
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: clamp(var(--text-lg), 2vw, var(--text-xl));
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-2xl);
  max-width: 540px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-3xl);
}

.hero-stats {
  display: flex;
  gap: var(--spacing-3xl);
  flex-wrap: wrap;
}

.hero-stat {
  text-align: left;
}

.hero-stat-value {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
}

/* === HERO VISUAL (RIGHT SIDE) === */
.hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-dashboard-card {
  width: 100%;
  max-width: 520px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 28px;
  padding: 32px;
  color: white;
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.3), 0 0 80px rgba(0, 200, 83, 0.1);
  animation: cardFloat 6s ease-in-out infinite;
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-12px) rotate(0.5deg); }
}

.hero-dash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-dash-title {
  font-size: 1rem;
  font-weight: 600;
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-dash-badge {
  background: rgba(0, 200, 83, 0.2);
  border: 1px solid rgba(0, 200, 83, 0.4);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-light);
}

.hero-dash-main-value {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-dash-sub {
  font-size: 0.95rem;
  opacity: 0.5;
  margin-bottom: 28px;
}

.hero-dash-bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 120px;
  margin-bottom: 24px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 16px;
}

.hero-bar {
  flex: 1;
  border-radius: 6px 6px 0 0;
  min-height: 12px;
  transition: height 1s ease;
  position: relative;
}

.hero-bar.green { background: linear-gradient(to top, var(--primary), var(--primary-light)); }
.hero-bar.blue { background: linear-gradient(to top, var(--secondary), #80D8FF); }
.hero-bar.accent { background: linear-gradient(to top, var(--accent), #B2FF59); }
.hero-bar.purple { background: linear-gradient(to top, var(--accent-purple), #E8C0FF); }

.hero-dash-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.hero-dash-stat {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 12px;
  padding: 14px;
}

.hero-dash-stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.hero-dash-stat-label {
  font-size: 0.75rem;
  opacity: 0.4;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-floating-icon {
  position: absolute;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  animation: iconFloat 5s ease-in-out infinite;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.hero-floating-icon.sun {
  top: -10px;
  right: -15px;
  background: linear-gradient(135deg, var(--accent-orange), #FFD740);
  animation-delay: 0s;
}

.hero-floating-icon.ev {
  bottom: 40px;
  left: -20px;
  background: linear-gradient(135deg, var(--secondary), #80D8FF);
  animation-delay: 1.5s;
}

.hero-floating-icon.leaf {
  top: 50%;
  right: -25px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  animation-delay: 3s;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .hero-centered {
    max-width: 700px;
    padding: 0 var(--spacing-md);
  }

  .hero-title {
    font-size: var(--text-4xl);
  }
}

/* === CALCULATOR CARDS GRID === */
.calculators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: var(--spacing-2xl);
}

.calc-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: visible;
}

.calc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.calc-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.calc-card:hover::before {
  transform: scaleX(1);
}

.calc-card-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 8px 24px rgba(0, 200, 83, 0.25);
}

.calc-card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.calc-card-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* === HOW IT WORKS === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-3xl);
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 50px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0.3;
}

.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  font-weight: 800;
  color: white;
  margin: 0 auto var(--spacing-xl);
  box-shadow: var(--shadow-glow);
}

.step-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.step-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === STATS COUNTER === */
.stats-section {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0, 200, 83, 0.1) 0%, transparent 70%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-3xl);
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  color: white;
}

.stat-value {
  font-size: var(--text-5xl);
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.6);
}

/* === CATEGORIES === */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-2xl);
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  transition: all var(--transition-base);
  cursor: pointer;
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.category-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto var(--spacing-lg);
  box-shadow: 0 8px 24px rgba(0, 200, 83, 0.25);
}

.category-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.category-count {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

/* === BLOG CARDS === */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.blog-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.blog-card-image {
  width: 100%;
  height: 220px;
  overflow: hidden;
  position: relative;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.blog-card:hover .blog-card-image img {
  transform: scale(1.05);
}

.blog-card-content {
  padding: var(--spacing-xl);
}

.blog-card-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gradient-primary);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.4;
}

.blog-card-excerpt {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

/* === LEAD CAPTURE === */
.lead-section {
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.lead-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top, rgba(0, 200, 83, 0.15) 0%, transparent 60%);
}

.lead-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  color: white;
}

.lead-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
}

.lead-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-2xl);
}

.lead-form {
  display: flex;
  gap: var(--spacing-md);
  max-width: 500px;
  margin: 0 auto;
}

.lead-form input {
  flex: 1;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  color: white;
  font-size: var(--text-base);
  backdrop-filter: blur(10px);
}

.lead-form input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.lead-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.2);
}

/* === CALCULATOR PAGE STYLES === */
.calculator-page {
  padding-top: calc(var(--header-height) + var(--spacing-3xl));
  padding-bottom: var(--spacing-6xl);
}

.calculator-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-4xl);
}

.calculator-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.calculator-breadcrumb a:hover {
  color: var(--primary);
}

.calculator-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.calculator-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

.calculator-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  max-width: 1200px;
  margin: 0 auto;
}

.calc-input-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
}

.calc-input-section h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.calc-input-group {
  margin-bottom: var(--spacing-lg);
}

.calc-input-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.calc-input-group input,
.calc-input-group select {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
}

.calc-input-group input:focus,
.calc-input-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.calc-result-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
}

.calc-result-section h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.calc-result-box {
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: white;
}

.calc-result-value {
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.calc-result-label {
  font-size: var(--text-base);
  opacity: 0.8;
}

.calc-chart-container {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  padding-bottom: 40px;
  min-height: 200px;
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  gap: var(--spacing-sm);
  overflow: visible;
}

.chart-bar {
  flex: 1;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  min-height: 8px;
  max-height: 100%;
  transition: height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.chart-bar-label {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  white-space: nowrap;
}

.calc-cta {
  margin-top: var(--spacing-3xl);
  text-align: center;
  padding: var(--spacing-3xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
}

.calc-cta h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.calc-cta p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.calc-cta > div {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

/* === BLOG POST STYLES === */
.blog-post {
  padding-top: calc(var(--header-height) + var(--spacing-3xl));
  padding-bottom: var(--spacing-6xl);
}

.blog-post-header {
  max-width: 900px;
  margin: 0 auto var(--spacing-4xl);
  text-align: center;
}

.blog-post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.editorial-badge {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  background: rgba(105, 255, 107, 0.08);
  border: 1px solid rgba(105, 255, 107, 0.15);
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

.reviewed-date {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  background: rgba(128, 216, 255, 0.08);
  border: 1px solid rgba(128, 216, 255, 0.15);
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

/* ===== BLOG IMAGE COPYRIGHT OVERLAY ===== */
.blog-post-featured,
.blog-card-image {
  position: relative;
  overflow: hidden;
}

.blog-post-featured::after,
.blog-card-image::after {
  content: '\00A9 Green RoiLab';
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  padding: 3px 10px;
  border-radius: 6px;
  z-index: 2;
  letter-spacing: 0.03em;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.blog-post-featured:hover::after,
.blog-card-image:hover::after {
  opacity: 1;
}

/* Always show on featured (full-size) images */
.blog-post-featured::after {
  opacity: 1;
}

.blog-post-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gradient-primary);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.blog-post-title {
  font-size: clamp(2rem, 4vw, var(--text-5xl));
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.02em;
}

.blog-post-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

.blog-post-featured {
  max-width: 1100px;
  margin: 0 auto var(--spacing-4xl);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.blog-post-featured img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 768px) {
  .blog-post-featured {
    height: 250px;
  }
}

@media (max-width: 480px) {
  .blog-post-featured {
    height: 180px;
  }
}

.blog-post-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-4xl);
  max-width: 1200px;
  margin: 0 auto;
}

.blog-toc {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-xl));
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  height: fit-content;
}

.blog-toc h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-lg);
  color: var(--text-tertiary);
}

.blog-toc ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.blog-toc li a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border-left: 2px solid var(--border);
  transition: all var(--transition-fast);
}

.blog-toc li a:hover,
.blog-toc li a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  background: rgba(0, 200, 83, 0.05);
}

.blog-post-content {
  max-width: 800px;
}

.blog-post-content h2 {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-top: var(--spacing-4xl);
  margin-bottom: var(--spacing-lg);
  line-height: 1.3;
}

.blog-post-content h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-md);
}

.blog-post-content h4 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.blog-post-content p {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.blog-post-content ul,
.blog-post-content ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.blog-post-content li {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  list-style-type: disc;
}

.blog-post-content ol li {
  list-style-type: decimal;
}

.blog-post-content blockquote {
  border-left: 4px solid var(--primary);
  padding: var(--spacing-lg) var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
  background: var(--bg-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.blog-info-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
  border-left: 4px solid var(--secondary);
}

.blog-info-box h4 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--secondary);
}

.blog-info-box p {
  margin-bottom: var(--spacing-sm);
}

.blog-tip-box {
  background: linear-gradient(135deg, rgba(0, 200, 83, 0.1) 0%, rgba(0, 176, 255, 0.1) 100%);
  border: 1px solid rgba(0, 200, 83, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
}

.blog-tip-box h4 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.blog-tip-box ul {
  margin: 0;
  padding-left: var(--spacing-xl);
}

.blog-tip-box li {
  margin-bottom: var(--spacing-sm);
}

.blog-embed-calculator {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin: var(--spacing-3xl) 0;
}

.blog-embed-calculator h4 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Ad Placeholders (hidden until AdSense approved) */
.ad-placeholder {
  display: none;
}

/* Blog Navigation */
.blog-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-4xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--border);
}

.blog-nav-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

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

.blog-nav-label {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-sm);
}

.blog-nav-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--primary);
}

/* Related Posts */
.related-posts {
  margin-top: var(--spacing-4xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--border);
}

.related-posts h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
}

/* Comments Section */
.comments-section {
  margin-top: var(--spacing-4xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--border);
}

.comments-section h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-2xl);
}

.comment-form {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.comment-form h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.comment-form textarea {
  width: 100%;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  min-height: 120px;
  resize: vertical;
  margin-bottom: var(--spacing-md);
}

.comment-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.comment-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.comment-author {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.comment-date {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-sm);
}

.comment-text {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === LEGAL PAGES === */
.legal-page {
  padding-top: calc(var(--header-height) + var(--spacing-4xl));
  padding-bottom: var(--spacing-6xl);
}

.legal-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-4xl);
}

.legal-title {
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
}

.legal-date {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-lg);
}

.legal-content h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.legal-content p {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.legal-content ul {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

.legal-content li {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  list-style-type: disc;
}

/* === ABOUT PAGE === */
.about-hero {
  background: var(--gradient-hero);
  padding: var(--spacing-6xl) 0;
  text-align: center;
  color: white;
  padding-top: calc(var(--header-height) + var(--spacing-4xl));
}

.about-hero h1 {
  font-size: var(--text-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
}

.about-hero p {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.7);
  max-width: 700px;
  margin: 0 auto;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-6xl) var(--spacing-xl);
}

.about-content h2 {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

.about-content p {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.about-value-card {
  text-align: center;
  padding: var(--spacing-2xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
}

.about-value-card .icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
}

.about-value-card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.about-value-card p {
  font-size: var(--text-base);
  color: var(--text-secondary);
}

/* === CONTACT PAGE === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  max-width: 1100px;
  margin: 0 auto;
}

.contact-info h2 {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.contact-info p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.contact-detail .icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
}

.contact-form h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* === FOOTER === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: var(--spacing-5xl) 0 var(--spacing-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-4xl);
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social a {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.footer-social a:hover {
  background: var(--gradient-primary);
  color: white;
  transform: translateY(-2px);
}

.footer-social svg,
.author-social svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.footer-column h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-column a {
  color: var(--text-secondary);
  font-size: var(--text-base);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--border);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.footer-bottom-links {
  display: flex;
  gap: var(--spacing-xl);
}

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

/* === ANIMATIONS === */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1200px) {
  :root {
    --text-6xl: 3.25rem;
    --text-7xl: 4rem;
  }
  
  .hero-grid {
    gap: var(--spacing-3xl);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  
  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 1024px) {
  .steps-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .steps-grid::before {
    display: none;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .calculator-container {
    grid-template-columns: 1fr;
  }
  
  .blog-post-layout {
    grid-template-columns: 1fr;
  }
  
  .blog-toc {
    position: static;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
    --spacing-6xl: 4rem;
    --spacing-5xl: 3rem;
    --spacing-4xl: 2.5rem;
  }

  .navbar-menu {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-title {
    font-size: var(--text-4xl);
  }

  .section-title {
    font-size: var(--text-3xl);
  }

  .calculators-grid {
    grid-template-columns: 1fr;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .lead-form {
    flex-direction: column;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }

  .blog-nav {
    grid-template-columns: 1fr;
  }

  .related-posts-grid {
    grid-template-columns: 1fr;
  }

  .about-values {
    grid-template-columns: 1fr;
  }

  /* New 2-column sections responsive */
  .container-wide > div[style*="grid-template-columns: 1fr 1fr"],
  section > .container-wide > div[style*="grid-template-columns"],
  section > .container > div[style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 480px) {
  :root {
    --text-4xl: 1.875rem;
    --text-5xl: 2.25rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .hero-centered .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-centered .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .calc-card {
    overflow: visible;
    padding: var(--spacing-xl);
  }

  .calc-card-icon {
    width: 56px;
    height: 56px;
    font-size: 1.75rem;
  }

  .category-icon {
    width: 64px;
    height: 64px;
    font-size: 2rem;
  }

  .calc-cta > div {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    padding: 12px 24px;
    font-size: var(--text-base);
  }
  
  .btn-lg {
    padding: 14px 28px;
  }
}

/* === PRINT STYLES === */
@media print {
  .navbar,
  .footer,
  .ad-placeholder,
  .comments-section,
  .theme-toggle {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .blog-post {
    padding: 0;
  }
}

/* ========================================
   COOKIE CONSENT BANNER & PREFERENCES MODAL
   GDPR/CCPA Compliant — Glassmorphism Style
   ======================================== */

/* --- BANNER --- */
#cookie-consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10000;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12);
  transform: translateY(100%);
  opacity: 0;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}

#cookie-consent-banner.visible {
  transform: translateY(0);
  opacity: 1;
}

.cookie-consent-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.cookie-consent-content {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.cookie-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
  line-height: 1;
}

.cookie-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.cookie-text a:hover {
  color: var(--primary-dark);
}

[data-theme="dark"] .cookie-text a:hover {
  color: var(--primary-light);
}

.cookie-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.btn-cookie-accept,
.btn-cookie-decline,
.btn-cookie-manage {
  padding: 10px 20px;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  border: none;
  outline: none;
  font-family: var(--font-primary);
}

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

.btn-cookie-accept:hover,
.btn-cookie-accept:focus-visible {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(0, 200, 83, 0.3);
  transform: translateY(-1px);
}

.btn-cookie-decline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-cookie-decline:hover,
.btn-cookie-decline:focus-visible {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

.btn-cookie-manage {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-cookie-manage:hover,
.btn-cookie-manage:focus-visible {
  background: var(--primary);
  color: #fff;
}

/* Focus visible ring for keyboard users */
.btn-cookie-accept:focus-visible,
.btn-cookie-decline:focus-visible,
.btn-cookie-manage:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* --- MODAL OVERLAY --- */
#cookie-consent-modal {
  position: fixed;
  inset: 0;
  z-index: 10001;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

#cookie-consent-modal.active {
  opacity: 1;
  visibility: visible;
}

/* --- MODAL CARD --- */
.cookie-modal-card {
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-base);
}

#cookie-consent-modal.active .cookie-modal-card {
  transform: scale(1) translateY(0);
}

.cookie-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.cookie-modal-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.cookie-modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cookie-modal-close:hover,
.cookie-modal-close:focus-visible {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.cookie-modal-close:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.cookie-modal-body {
  padding: var(--spacing-xl);
}

.cookie-modal-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.cookie-modal-desc a {
  color: var(--primary);
  text-decoration: underline;
}

/* --- TOGGLE ITEMS --- */
.cookie-preference-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: border-color var(--transition-fast);
}

.cookie-preference-item:hover {
  border-color: var(--text-tertiary);
}

.cookie-pref-info {
  flex: 1;
}

.cookie-pref-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.cookie-pref-desc {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* --- TOGGLE SWITCH --- */
.cookie-toggle-wrapper {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.cookie-toggle-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cookie-toggle {
  position: relative;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.cookie-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.cookie-toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 26px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.cookie-toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--text-tertiary);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.cookie-toggle input:checked + .cookie-toggle-slider {
  background: var(--primary);
  border-color: var(--primary);
}

.cookie-toggle input:checked + .cookie-toggle-slider::before {
  transform: translateY(-50%) translateX(22px);
  background: #fff;
}

.cookie-toggle input:focus-visible + .cookie-toggle-slider {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.cookie-toggle input:disabled + .cookie-toggle-slider {
  opacity: 0.5;
  cursor: not-allowed;
}

.cookie-toggle-always-on {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --- MODAL FOOTER --- */
.cookie-modal-footer {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
}

.btn-cookie-save {
  flex: 1;
  padding: 12px 24px;
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-primary);
}

.btn-cookie-save:hover,
.btn-cookie-save:focus-visible {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(0, 200, 83, 0.3);
}

.btn-cookie-save:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-cookie-reset {
  padding: 12px 20px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-tertiary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-primary);
}

.btn-cookie-reset:hover,
.btn-cookie-reset:focus-visible {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.btn-cookie-reset:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* --- MOBILE RESPONSIVE --- */
@media (max-width: 768px) {
  #cookie-consent-banner {
    padding: var(--spacing-md) var(--spacing-md);
  }

  .cookie-consent-inner {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .cookie-consent-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }

  .cookie-icon {
    display: none;
  }

  .cookie-text {
    font-size: var(--text-xs);
  }

  .cookie-buttons {
    width: 100%;
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .btn-cookie-accept,
  .btn-cookie-decline,
  .btn-cookie-manage {
    width: 100%;
    padding: 12px 20px;
    text-align: center;
  }

  /* Modal mobile adjustments */
  #cookie-consent-modal {
    padding: var(--spacing-md);
    align-items: flex-end;
  }

  .cookie-modal-card {
    max-width: 100%;
    max-height: 85vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  }

  .cookie-modal-header {
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
  }

  .cookie-modal-body {
    padding: var(--spacing-lg);
  }

  .cookie-modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    flex-direction: column;
  }

  .cookie-preference-item {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .cookie-toggle-wrapper {
    align-self: flex-end;
  }
}

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
  #cookie-consent-banner,
  #cookie-consent-modal,
  .cookie-modal-card,
  .btn-cookie-accept,
  .btn-cookie-decline,
  .btn-cookie-manage,
  .btn-cookie-save,
  .btn-cookie-reset {
    transition: none !important;
  }
}

/* ========================================
   BREADCRUMB NAVIGATION
   Schema.org BreadcrumbList compliant
   ======================================== */

.breadcrumb {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-xl);
  background: transparent;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
  line-height: 1.5;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: '\203A'; /* › single right-pointing angle quotation mark */
  display: inline-block;
  margin: 0 var(--spacing-sm);
  color: var(--text-tertiary);
  font-size: var(--text-base);
  line-height: 1;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--primary);
}

.breadcrumb a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 2px;
}

.breadcrumb span[itemprop="name"]:not(a span[itemprop="name"]) {
  color: var(--text-tertiary);
  font-weight: 400;
  white-space: nowrap;
}

/* Mobile: horizontal scroll if breadcrumb overflows */
@media (max-width: 768px) {
  .breadcrumb {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .breadcrumb ol {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    scroll-behavior: smooth;
    gap: 0;
    padding-bottom: 2px;
  }

  .breadcrumb ol::-webkit-scrollbar {
    display: none;
  }

  .breadcrumb ol::-webkit-scrollbar-thumb {
    display: none;
  }

  .breadcrumb li:not(:last-child)::after {
    margin: 0 6px;
    flex-shrink: 0;
  }

  .breadcrumb li {
    flex-shrink: 0;
  }
}

/* Dark mode tweaks */
[data-theme="dark"] .breadcrumb a:hover,
[data-theme="dark"] .breadcrumb a:focus-visible {
  color: var(--primary-light);
}

/* Print: hide breadcrumb */
@media print {
  .breadcrumb {
    display: none !important;
  }
}