:root {
  --color-background: #FFFFFF;
  --color-background-alt: #F9FAFB;
  --color-text-primary: #1F2937;
  --color-text-secondary: #4B5563;
  --color-primary: #0f54a7;
  --color-accent-pop: #f88d2b;
  --color-border: #E5E7EB;
}

[data-theme="dark"] {
  --color-background: #111827;
  --color-background-alt: #1F2937;
  --color-text-primary: #F9FAFB;
  --color-text-secondary: #D1D5DB;
  --color-primary: #4a8bdb;
  --color-accent-pop: #fa9f52;
  --color-border: #374151;
}

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

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

body {
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

h1 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 2rem;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 1rem;
}

p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

.cta-button {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  font-size: 1rem;
}

.primary-cta {
  background-color: var(--color-accent-pop);
  color: white;
}

.primary-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(248, 141, 43, 0.6), 0 0 60px rgba(248, 141, 43, 0.3);
  background-color: var(--color-accent-pop);
}

.navbar {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-image {
  height: 70px;
  width: auto;
  object-fit: contain;
  content: url('../assets/nextera-elec-v2-sign-logo-transparent.png');
  border-radius: 8px;
}

[data-theme="dark"] .logo-image {
  content: url('../assets/nextera-elec-v2-sign-logo.png');
}

.footer-logo {
  height: 70px;
  width: auto;
  object-fit: contain;
  margin-bottom: 1rem;
  content: url('../assets/nextera-elec-v2-sign-logo-transparent.png');
  border-radius: 8px;
}

[data-theme="dark"] .footer-logo {
  content: url('../assets/nextera-elec-v2-sign-logo.png');
}

.nav-links {
  display: flex;
  gap: 2rem;
}

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

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

.nav-cta {
  background-color: var(--color-primary);
  color: white;
}

.nav-cta:hover {
  background-color: var(--color-accent-pop);
}

.theme-toggle-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 1rem;
}

.theme-toggle-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.theme-toggle {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

.theme-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-border);
  transition: 0.3s;
  border-radius: 26px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: var(--color-background);
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

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

input:checked + .slider:before {
  transform: translateX(24px);
}

[data-theme="dark"] .slider {
  background-color: var(--color-primary);
}

[data-theme="dark"] .slider:before {
  transform: translateX(24px);
}

[data-theme="dark"] .navbar {
  background-color: rgba(17, 24, 39, 0.8);
}

/* Controls Stack Container */
.controls-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  margin-left: 1rem;
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.lang-button {
  padding: 8px 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  font-family: 'Inter', sans-serif;
}

.lang-button:hover {
  background: var(--color-background-alt);
}

.lang-button.active {
  background: var(--color-primary);
  color: white;
}

.lang-button:first-child {
  border-right: 1px solid var(--color-border);
}

/* Mobile responsive styles for controls stack */
@media (max-width: 768px) {
  .controls-stack {
    margin-left: 0.5rem;
    gap: 0.3rem;
  }
  
  .lang-button {
    padding: 6px 8px;
    font-size: 0.8rem;
  }
  
  .theme-toggle-container {
    margin-left: 0;
  }
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-text-primary);
  margin: 3px 0;
  transition: 0.3s;
  border-radius: 2px;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 400px;
  height: 100vh;
  background-color: white;
  box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
  transition: right 0.3s ease;
  z-index: 200;
  padding: 2rem;
}

.mobile-menu.active {
  right: 0;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 3rem;
}

.mobile-nav a {
  text-decoration: none;
  color: var(--color-text-primary);
  font-size: 1.25rem;
  font-weight: 500;
}

.hero-section {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

#hero-animation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

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

.hero-subtitle {
  font-size: 1.5rem;
  margin: 1rem 0 1.5rem;
  color: var(--color-text-secondary);
}

.social-proof-bar {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.social-proof-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
}

.social-proof-bar p {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.client-logos {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.logo-item {
  filter: grayscale(100%) opacity(0.6);
  transition: filter 0.3s ease;
}

.logo-item:hover {
  filter: grayscale(0%) opacity(1);
}

.interactive-demo-section {
  padding: 3rem 0;
  background-color: var(--color-background);
}

.interactive-demo-section h2 {
  text-align: center;
  margin-bottom: 3rem;
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.chat-window {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  padding: 1.5rem;
  background-color: white;
}

.chat-message {
  margin-bottom: 1.5rem;
}

.chat-message.assistant {
  background-color: var(--color-background-alt);
  padding: 1rem;
  border-radius: 8px;
}

.chat-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chat-option {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  text-align: left;
}

.chat-option:hover {
  background-color: rgba(59, 130, 246, 0.2);
}

.chat-option.active {
  background-color: var(--color-primary);
  color: white;
}

.demo-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.demo-content.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.demo-icon {
  margin-bottom: 1.5rem;
}

.demo-content ul {
  list-style: none;
  padding: 0;
}

.demo-content li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
}

.demo-content li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.process-section {
  padding: 5rem 0;
  background-color: var(--color-background-alt);
}

.process-section h2 {
  text-align: center;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  position: relative;
}

.process-grid::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 25%;
  right: 25%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary) 50%, transparent 50%);
  background-size: 20px 2px;
  z-index: 0;
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
  background-color: var(--color-background-alt);
  padding: 2rem;
}

.process-icon {
  margin-bottom: 1.5rem;
}

.case-study-section {
  padding: 5rem 0;
  background-color: var(--color-background);
}

.case-study-card {
  background-color: var(--color-background-alt);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--color-border);
}

[data-theme="dark"] .case-study-card {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

blockquote {
  font-size: 1.5rem;
  font-style: italic;
  color: var(--color-text-primary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.metrics {
  display: flex;
  justify-content: space-around;
  margin: 2rem 0;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.metric {
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.metric-label {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.attribution {
  margin-top: 2rem;
  color: var(--color-text-secondary);
}

.attribution strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.final-cta-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, transparent 100%);
  text-align: center;
}

.final-cta-section p {
  font-size: 1.25rem;
  margin: 1rem 0 2rem;
}

.footer {
  background-color: var(--color-background-alt);
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-nav a {
  text-decoration: none;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.copyright {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: var(--color-background);
  color: var(--color-text-secondary);
  transition: all 0.2s ease;
}

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

@media (max-width: 1024px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2rem;
  }

  .demo-grid {
    gap: 2rem;
  }

  .process-grid {
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

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

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  p {
    font-size: 1rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .container {
    padding: 0 1rem;
  }

  .social-proof-bar .container {
    flex-direction: column;
    gap: 1.5rem;
  }

  .client-logos {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
  }

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

  .process-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .metrics {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .footer-nav {
    align-items: center;
  }

  .social-links {
    justify-content: center;
  }

  blockquote {
    font-size: 1.25rem;
  }

  .case-study-card {
    padding: 2rem;
  }

  .modal-content {
    margin: 10% auto;
    width: 95%;
  }

  .contact-form {
    padding: 1.5rem;
  }

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

/* Contact Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  background-color: var(--color-background);
  margin: 5% auto;
  padding: 0;
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  margin: 0;
  color: var(--color-text-primary);
  font-size: 1.5rem;
}

.close {
  color: var(--color-text-secondary);
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  transition: color 0.3s ease;
}

.close:hover {
  color: var(--color-text-primary);
}

.contact-form {
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  margin-top: 2rem;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn-primary:hover {
  background-color: var(--color-accent-pop);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background-color: var(--color-background-alt);
  color: var(--color-text-primary);
}

/* Privacy Policy Modal Styles */
.privacy-modal {
  max-width: 700px;
  max-height: 80vh;
  overflow-y: auto;
}

.privacy-content {
  padding: 2rem;
  line-height: 1.6;
}

.privacy-section {
  margin-bottom: 2rem;
}

.privacy-section h3 {
  color: var(--color-primary);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.privacy-section p {
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.privacy-section ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.privacy-section li {
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .privacy-modal {
    max-width: 95%;
    max-height: 85vh;
  }

  .privacy-content {
    padding: 1.5rem;
  }
}