/* CSS Variables - Design System */
:root {
  /* Colors */
  --color-primary: #1D7F5D;
  --color-dark: #0B1F17;
  --color-accent: #58C27D;
  --color-neutral-light: #F3F6F4;
  --color-text: #0A0D0C;
  --color-text-light: #6B7280;
  --color-white: #FFFFFF;
  --color-error: #DC2626;
  --color-success: #059669;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  
  /* 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;
  --spacing-4xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 0.5rem;
  --border-radius-lg: 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);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 8px;
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Focus styles */
*:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-light);
}

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

a:hover {
  color: var(--color-accent);
}

/* Layout */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: 0 auto;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(29, 127, 93, 0.1);
  z-index: 100;
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-md);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.logo img {
  height: 40px;
  width: auto;
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-menu a {
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.nav-menu a:hover {
  color: var(--color-primary);
}

.nav-cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.nav-cta:hover {
  background: var(--color-accent);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-text);
  margin: 3px 0;
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-neutral-light) 0%, rgba(88, 194, 125, 0.1) 100%);
  overflow: hidden;
  padding-top: 80px; /* Account for fixed header */
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.1;
}

.energy-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(29, 127, 93, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 127, 93, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: grid-flow 20s linear infinite;
}

@keyframes grid-flow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-locations {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.hero-locations .location-icon {
  color: var(--color-accent);
}

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.detail-item {
  background: rgba(255, 255, 255, 0.9);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(29, 127, 93, 0.1);
  transition: all var(--transition-normal);
}

.detail-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.detail-item h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.detail-item p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

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

.stat-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: 500;
}

.cta-button {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.cta-button:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Promotional Banner */
.promo-banner {
  padding: var(--spacing-4xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-white);
}

.promo-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.promo-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.promo-highlight h3 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-white);
}

.promo-highlight p {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
}

.promo-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.promo-stat {
  text-align: center;
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  backdrop-filter: blur(10px);
}

.promo-stat strong {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
}

.promo-stat span {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

/* Features Section */
.features {
  padding: var(--spacing-4xl) 0;
  background: var(--color-neutral-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-2xl);
}

.feature-card {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid rgba(29, 127, 93, 0.1);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
}

.feature-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Impact Metrics */
.impact {
  padding: var(--spacing-4xl) 0;
  background: var(--color-white);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

.metric-card {
  text-align: center;
  padding: var(--spacing-2xl);
  background: linear-gradient(135deg, var(--color-neutral-light), rgba(88, 194, 125, 0.05));
  border-radius: var(--border-radius-lg);
  transition: transform var(--transition-normal);
}

.metric-card:hover {
  transform: translateY(-2px);
}

.metric-number {
  display: block;
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.metric-label {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Case Studies */
.case-studies {
  padding: var(--spacing-4xl) 0;
  background: var(--color-neutral-light);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.case-card {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border-left: 4px solid var(--color-primary);
}

.case-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.case-card h3 {
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.case-card p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.case-metrics {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.case-metric {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* Technology & Security */
.tech-security {
  padding: var(--spacing-4xl) 0;
  background: var(--color-white);
}

.tech-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  flex-wrap: wrap;
}

.tech-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  background: var(--color-neutral-light);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.tech-badge:hover {
  border-color: var(--color-primary);
  background: var(--color-white);
  transform: translateY(-2px);
}

.tech-icon {
  color: var(--color-primary);
  margin-right: var(--spacing-sm);
}

/* Global Presence */
.global-presence {
  padding: var(--spacing-4xl) 0;
  background: var(--color-neutral-light);
}

.locations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.location-card {
  background: var(--color-white);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
  text-align: center;
}

.location-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.location-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.location-icon {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.location-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.location-card p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
  line-height: 1.5;
}

.location-card p:last-child {
  margin-bottom: 0;
}

/* Contact Section */
.contact {
  padding: var(--spacing-4xl) 0;
  background: var(--color-white);
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

.contact-form {
  background: var(--color-neutral-light);
  padding: var(--spacing-3xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid rgba(29, 127, 93, 0.2);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast);
  background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  outline: none;
}

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.checkmark {
  flex-shrink: 0;
}

.error-message {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

.error-message.show {
  display: block;
}

.submit-button {
  width: 100%;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-lg);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: var(--font-family);
}

.submit-button:hover {
  background: var(--color-accent);
  transform: translateY(-1px);
}

.submit-button:disabled {
  background: var(--color-text-light);
  cursor: not-allowed;
  transform: none;
}

.form-success {
  display: none;
  align-items: center;
  gap: var(--spacing-md);
  background: var(--color-success);
  color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-lg);
  font-weight: 500;
}

.form-success.show {
  display: flex;
}

/* Footer */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

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

.footer-brand img {
  margin-bottom: var(--spacing-md);
  filter: brightness(0) invert(1);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 0;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

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



.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: var(--spacing-4xl) var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-normal);
    z-index: 999;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-menu li {
    margin-bottom: var(--spacing-lg);
  }
  
  .nav-menu a {
    font-size: var(--font-size-lg);
    padding: var(--spacing-md) 0;
  }
  
  .nav-toggle {
    display: flex;
    z-index: 1000;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero {
    padding-top: 100px; /* More padding on mobile for better spacing */
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero-details {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .promo-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    text-align: center;
  }
  
  .promo-stats {
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-lg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }
  
  .tech-badges {
    gap: var(--spacing-lg);
  }
  
  .tech-badge {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .section-header h2 {
    font-size: var(--font-size-3xl);
  }
  
  .features-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-form {
    padding: var(--spacing-xl);
  }
  
  .case-metrics {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* Print Styles */
@media print {
  .header,
  .nav-toggle,
  .cta-button,
  .contact,
  .footer-social {
    display: none;
  }
  
  .hero {
    min-height: auto;
    padding: var(--spacing-2xl) 0;
  }
  
  * {
    background: white !important;
    color: black !important;
  }
}