/* Main application styles for EnatDrive PWA */
:root {
  /* Color System */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #2563eb;
  --secondary-color: #7c3aed;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --info-color: #3b82f6;
  
  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-card: #ffffff;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border-color: #e5e7eb;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.12);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 60px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 36px;
  --font-size-4xl: 48px;
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-card: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 32px 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);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  min-height: 100vh;
  min-height: 100dvh; /* Dynamic viewport height for mobile */
  padding: var(--spacing-md);
  max-width: 1280px;
  margin: 0 auto;
  background: var(--bg-primary);
}

/* Typography Scale */
h1 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

p {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

/* Links */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--secondary-color);
  text-decoration: underline;
  outline: none;
}

/* Placeholder Content */
.placeholder-content {
  max-width: 1200px;
  margin: 0 auto;
}

.hero-section {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-md);
}

.hero-logo {
  width: 120px;
  height: 120px;
  margin-bottom: var(--spacing-xl);
  border-radius: var(--radius-2xl);
  object-fit: contain;
}

.hero-section h1 {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.hero-section > p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
}

/* Feature Cards */
.feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.feature-card {
  background: var(--bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.feature-card h3 {
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

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

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  gap: var(--spacing-sm);
  min-height: 44px; /* Touch target size */
  min-width: 44px;
}

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

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

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-secondary);
  transform: translateY(-1px);
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease-in-out;
}

.loading-content {
  text-align: center;
}

.loading-logo {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-lg);
  border-radius: var(--radius-lg);
  object-fit: contain;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: var(--spacing-lg) auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

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

.hidden {
  display: none !important;
}

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

/* Focus Styles for Accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .loading-spinner {
    animation: none;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --shadow: 0 0 0 1px #000000;
  }
  
  .feature-card {
    border: 2px solid var(--border-color);
  }
}

/* Mobile First Responsive Design */
@media (max-width: 768px) {
  .app-container {
    padding: var(--spacing-sm);
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  .hero-section {
    padding: var(--spacing-2xl) var(--spacing-sm);
  }
  
  .hero-logo {
    width: 80px;
    height: 80px;
  }
  
  .hero-section > p {
    font-size: var(--font-size-base);
  }
  
  .feature-cards {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
  }
  
  .feature-card {
    padding: var(--spacing-lg);
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Tablet Styles */
@media (min-width: 769px) and (max-width: 1024px) {
  .feature-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Large Desktop Styles */
@media (min-width: 1025px) {
  .app-container {
    padding: var(--spacing-xl);
  }
}

/* PWA Specific Styles */
.pwa-mode {
  /* Additional styles when app is installed as PWA */
}

.pwa-mode .app-container {
  padding-top: max(var(--spacing-md), env(safe-area-inset-top));
  padding-bottom: max(var(--spacing-md), env(safe-area-inset-bottom));
}

/* Print Styles */
@media print {
  .loading-screen,
  .offline-banner,
  .update-banner,
  .install-prompt {
    display: none !important;
  }
  
  .app-container {
    background: white;
    color: black;
  }
  
  .feature-card {
    break-inside: avoid;
    border: 1px solid #000;
  }
}