/* CSS Variables for Theme Support */
:root {
  /* Light Theme Colors */
  --brand-color: #189253;
  --primary-button: #3276d2;
  --cursor-color: #f88c01;
  --background-color: #ffffff;
  --text-primary: #1a1a1a;
  --text-secondary: #666666;
  --text-muted: #999999;
  --surface-color: #ffffff;
  --surface-hover: #f8f9fa;
  --border-color: #e1e5e9;
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-medium: rgba(0, 0, 0, 0.15);
  
  /* Spacing */
  --container-max-width: 1200px;
  --section-padding: 5rem 0;
  --border-radius: 12px;
  --border-radius-small: 8px;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 2rem;
  --font-size-4xl: 2.5rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --primary-button: #ef6c00;
  --background-color: #121212;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #888888;
  --surface-color: #1e1e1e;
  --surface-hover: #2a2a2a;
  --border-color: #333333;
  --shadow-light: rgba(0, 0, 0, 0.3);
  --shadow-medium: rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  transition: background-color var(--transition-medium), color var(--transition-medium);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

.brand-text {
  color: var(--brand-color);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-medium);
}

[data-theme="dark"] .header {
  background: rgba(18, 18, 18, 0.95);
}

.nav {
  padding: 1rem 0;
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-menu-toggle .fa-times {
  display: none;
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--brand-color);
  margin: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--brand-color);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-small);
  padding: 0.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--brand-color);
  border-color: var(--brand-color);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-base);
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-medium);
}

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

.btn-secondary:hover {
  border-color: var(--brand-color);
  color: var(--brand-color);
}

.btn-support {
  background: var(--cursor-color);
  color: white;
}

.btn-support:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(248, 140, 1, 0.3);
}

/* Hero Section */
.hero {
  padding: 8rem 0 5rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-badges {
  display: flex;
  gap: 0.75rem;
}

.badge {
  padding: 0.5rem 1rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-small);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--brand-color);
}

/* Demo Video Section */
.hero-demo {
  display: flex;
  justify-content: center;
  align-items: center;
}

.demo-container {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 20px 40px var(--shadow-medium);
  background: var(--surface-color);
}

.demo-video {
  max-height: 70vh;
  height: 1280px;
  aspect-ratio: 720 / 1280;
  display: block;
  background: var(--surface-color);
}

.demo-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity var(--transition-medium);
  pointer-events: none;
}

.demo-container:hover .demo-overlay {
  opacity: 1;
}

.demo-play-icon {
  font-size: 3rem;
  color: white;
}

/* Section Styles */
.section-title {
  text-align: center;
  margin-bottom: 3rem;
  font-weight: 700;
}

/* How It Works Section */
.how-it-works {
  padding: var(--section-padding);
  background: var(--surface-color);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.step {
  display: flex;
  gap: 1rem;
  padding: 2rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 20px var(--shadow-light);
  transition: transform var(--transition-medium);
}

.step:hover {
  transform: translateY(-5px);
}

.step-number {
  width: 3rem;
  height: 3rem;
  background: var(--brand-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.step-content h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.step-content p {
  color: var(--text-secondary);
  margin: 0;
}

/* Features Section */
.features {
  padding: var(--section-padding);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2.5rem 2rem;
  background: var(--surface-color);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: all var(--transition-medium);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px var(--shadow-light);
  border-color: var(--brand-color);
}

.feature-icon {
  width: 4rem;
  height: 4rem;
  background: var(--brand-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: var(--font-size-xl);
}

.feature-card h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* About Section */
.about {
  padding: var(--section-padding);
  background: var(--surface-color);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 3rem;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--brand-color);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Support Section */
.support {
  padding: var(--section-padding);
  text-align: center;
}

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

.support-text {
  margin-bottom: 2rem;
}

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

.support-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.support-note {
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.support-note p {
  color: var(--text-muted);
  margin: 0;
}

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

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand h3 {
  color: var(--brand-color);
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 3rem;
}

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

.footer-section a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 0.5rem;
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--brand-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-muted);
  margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  /* Navigation */
  .nav-menu {
    display: none;
  }
  .nav-menu.active {
    display: flex;
    flex-direction: column;
    align-items: end;
  }
  .nav-container:has(.nav-menu.active) {
    gap: 2rem;
    flex-direction: column;
    align-items: end;
  }
  .nav-container:has(.nav-menu.active) .mobile-menu-toggle {
    order: -1;
    transform: scale(1.5) translateY(5px);
  }
  .nav-container:has(.nav-menu.active) .fa-times {
    display: initial;
  }
  .nav-container:has(.nav-menu.active) .fa-bars {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  /* Hero */
  .hero {
    padding: 6rem 0 3rem;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-actions .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  .hero-badges {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  /* Steps */
  .steps {
    grid-template-columns: 1fr;
  }
  
  .step {
    flex-direction: column;
    text-align: center;
  }
  
  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  /* About Stats */
  .about-stats {
    gap: 2rem;
  }
  
  /* Support */
  .support-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .support-actions .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
  
  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .about-stats {
    flex-direction: column;
    gap: 1.5rem;
  }
}

/* Smooth Scrolling for Safari */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

/* Focus Styles */
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--cursor-color);
  outline-offset: 2px;
}

/* Selection Styles */
::selection {
  background-color: var(--cursor-color);
  color: white;
}