/* CSS Variables - Tech-Forward Color Scheme */
:root {
  /* Primary Colors */
  --primary-blue: #0066FF;
  --primary-blue-dark: #0052CC;
  --primary-blue-light: #3385FF;
  --electric-cyan: #00FFFF;
  --electric-cyan-dark: #00CCCC;
  
  /* Neutral Colors */
  --dark-bg: #0A0B0D;
  --dark-surface: #1A1D23;
  --dark-surface-hover: #252A33;
  --dark-border: #2A2F3A;
  --medium-gray: #6B7280;
  --light-gray: #9CA3AF;
  --white: #FFFFFF;
  --off-white: #F8FAFC;
  
  /* Status Colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--electric-cyan) 100%);
  --gradient-surface: linear-gradient(135deg, var(--dark-surface) 0%, var(--dark-surface-hover) 100%);
  --gradient-hero: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-surface) 50%, var(--dark-surface-hover) 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.3);
  --shadow-glow-cyan: 0 0 20px rgba(0, 255, 255, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--dark-bg);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 11, 13, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--dark-border);
  padding: var(--spacing-md) var(--spacing-lg);
  transition: all 0.3s ease;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  padding: 0;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 11, 13, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--dark-border);
  padding: var(--spacing-md) var(--spacing-lg);
  transition: all 0.3s ease;
}


header .container {
  padding: 0;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.logo {
  flex: 0 0 auto;
}
nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}
.mobile-menu-toggle {
  margin-left: var(--spacing-lg);
  display: none;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}
.mobile-menu-toggle {
  margin-left: var(--spacing-lg);
}

nav a {
  color: var(--light-gray);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

nav a:hover {
  color: var(--white);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--white);
  transition: all 0.3s ease;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  font-size: 0.875rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: var(--primary-blue);
  color: var(--white);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

/* Hero Section */
#hero {
  min-height: 100vh;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  padding: calc(var(--spacing-3xl) + 64px) var(--spacing-3xl) var(--spacing-3xl) var(--spacing-3xl); /* Add header height to top padding */
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(0, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.grid-node {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--dark-surface);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  border: 2px solid var(--dark-border);
  transition: background 0.3s, border 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  display: flex;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

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

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--medium-gray);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.energy-grid {
  position: relative;
  width: 300px;
  height: 300px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-node {
  width: 60px;
  height: 60px;
  border: 2px solid var(--dark-border);
  border-radius: 50%;
  background: var(--dark-surface);
  position: relative;
  transition: all 0.3s ease;
}

.grid-node.active {
  border-color: var(--electric-cyan);
  background: var(--dark-surface);
  box-shadow: var(--shadow-glow-cyan);
}

.grid-node.active::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  background: var(--electric-cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.5); opacity: 0.5; }
}

/* Features Section */
#features {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-surface);
}

#features h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-3xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--gradient-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-blue);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
  display: block;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

.feature-card p {
  color: var(--light-gray);
  line-height: 1.6;
}

/* How It Works Section */
#how-it-works {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-bg);
}

#how-it-works h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-3xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.process-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.step {
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  max-width: 300px;
  position: relative;
}

.step-number {
  display: inline-block;
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--spacing-lg) auto;
}

.step h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

.step p {
  color: var(--light-gray);
  line-height: 1.6;
}

.step-arrow {
  font-size: 2rem;
  color: var(--primary-blue);
  font-weight: bold;
}

/* Contact Section */
#contact {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-surface);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.contact-text h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-text p {
  font-size: 1.125rem;
  color: var(--light-gray);
  margin-bottom: var(--spacing-xl);
}

.contact-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.benefit-icon {
  color: var(--success);
  font-weight: bold;
}

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

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--white);
}

.form-group input {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group input::placeholder {
  color: var(--medium-gray);
}

.success-message {
  text-align: center;
  padding: var(--spacing-xl);
}

.success-icon {
  display: inline-block;
  width: 60px;
  height: 60px;
  background: var(--success);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 auto var(--spacing-lg) auto;
}

.success-message h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

.success-message p {
  color: var(--light-gray);
}

/* Footer */
footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--dark-border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

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

.footer-brand .logo {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  color: var(--medium-gray);
  line-height: 1.6;
}

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

.link-group h4 {
  color: var(--white);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.link-group a {
  display: block;
  color: var(--medium-gray);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  transition: color 0.3s ease;
}

.link-group a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid var(--dark-border);
  padding-top: var(--spacing-xl);
  text-align: center;
}

.footer-bottom p {
  color: var(--medium-gray);
  font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .mobile-menu-toggle {
    display: flex !important;
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    margin-left: 0;
    z-index: 1100;
  }

  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--dark-bg);
    border-top: 1px solid var(--dark-border);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
  }

  nav.active {
    display: flex;
  }

  nav a {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--dark-border);
  }

  /* Mobile section background unification - smooth transitions without gaps */
  #hero {
    padding: calc(var(--spacing-xl) + 56px) var(--spacing-md) var(--spacing-xl) var(--spacing-md);
    background: var(--dark-bg);
  }

  #features {
    background: var(--dark-bg);
    padding: var(--spacing-xl) 0;
  }

  #how-it-works {
    background: var(--dark-bg);
    padding: var(--spacing-xl) 0;
  }

  #contact {
    background: var(--dark-bg);
    padding: var(--spacing-xl) 0;
  }

  footer {
    background: var(--dark-bg);
    border-top: none;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    justify-items: center;
  }

  .hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: 0 auto;
  }

  .energy-grid {
    margin: 0 auto;
  }

  .hero-text h1 {
    font-size: 2.5rem;
  }

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

  .hero-actions {
    justify-content: center;
  }

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

  .process-steps {
    flex-direction: column;
  }

  .step-arrow {
    transform: rotate(90deg);
  }

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

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

  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  #features h2,
  #how-it-works h2,
  .contact-text h2 {
    font-size: 2rem;
  }
}

/* Pricing Section */
#pricing {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-surface);
}

#pricing h2 {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  color: var(--white);
  font-size: 2.5rem;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--dark-bg);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 102, 255, 0.1);
}

.pricing-card.featured {
  border-color: var(--primary-blue);
  background: linear-gradient(135deg, var(--dark-bg) 0%, rgba(0, 102, 255, 0.05) 100%);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
}

.pricing-card h3 {
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.price {
  margin-bottom: var(--spacing-md);
}

.price .amount {
  color: var(--white);
  font-size: 3rem;
  font-weight: 700;
}

.price .period {
  color: var(--medium-gray);
  font-size: 1.125rem;
  margin-left: var(--spacing-xs);
}

.annual-option {
  color: var(--electric-cyan);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg);
  font-weight: 500;
}

.pricing-card .features {
  list-style: none;
  padding: 0;
  margin: var(--spacing-xl) 0;
  text-align: left;
}

.pricing-card .features li {
  color: var(--light-gray);
  padding: var(--spacing-sm) 0;
  font-size: 0.975rem;
}

.pricing-card .btn {
  width: 100%;
  margin-top: var(--spacing-lg);
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  #pricing h2 {
    font-size: 2rem;
  }
  
  .price .amount {
    font-size: 2.5rem;
  }
}

#demand-optimization {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-bg);
  text-align: center;
}
#demand-optimization h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#demand-optimization .intro {
  color: var(--light-gray);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
}
#demand-optimization .education,
#demand-optimization .optimization-details,
#demand-optimization .benefits {
  margin-bottom: var(--spacing-xl);
  text-align: left;
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}
#demand-optimization h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}
#demand-optimization p,
#demand-optimization ul li {
  color: var(--light-gray);
  line-height: 1.6;
}
#demand-optimization ul {
  list-style: none;
  padding: 0;
}
#demand-optimization ul li {
  margin-bottom: var(--spacing-sm);
  position: relative;
  padding-left: 1.5rem;
}
#demand-optimization ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
}
/* Demand Optimization – Spike Examples */
#demand-optimization .demand-spikes {
  margin-bottom: var(--spacing-xl);
  text-align: left;
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}
#demand-optimization .demand-spikes h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}
#demand-optimization .demand-spikes p {
  color: var(--light-gray);
  margin-bottom: var(--spacing-md);
}
#demand-optimization .spike-list {
  list-style: none;
  padding: 0;
}
#demand-optimization .spike-list li {
  color: var(--light-gray);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
  position: relative;
  padding-left: 1.5rem;
}
#demand-optimization .spike-list li::before {
  content: "⚡";
  position: absolute;
  left: 0;
  color: var(--primary-blue);
  font-weight: bold;
}

/* Policy Page Styling */
.policy-container.container {
  margin-top: 64px;
  margin-bottom: 64px;
  padding-top: 32px;
  padding-bottom: 32px;
  max-width: 800px;
}
.policy-box {
  background: var(--dark-surface);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}
.policy-section {
  margin-bottom: 2rem;
}
.policy-section h2 {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--primary-blue);
  font-size: 1.25rem;
}
.policy-section ul {
  margin-left: 1.5rem;
}
.breadcrumb {
  margin-bottom: 1.5rem;
  color: var(--medium-gray);
  font-size: 0.95rem;
}
.effective-date {
  color: var(--medium-gray);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
@media (max-width: 900px) {
  .policy-container.container {
    margin-top: 48px;
    margin-bottom: 48px;
    padding: 16px;
    max-width: 98vw;
  }
  .policy-box {
    padding: 1rem;
  }
}