/* Design Elevation - Color System - Navy Blue Theme per Design Spec */
:root {
  /* Primary colors - Navy Blue theme */
  --primary-navy: #1e40af;
  --primary-navy-secondary: #1e3a8a;
  --primary-navy-light: #3b82f6;
  --primary-navy-dark: #1e3a8a;
  
  /* Text colors - Slate Gray per design spec */
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-tertiary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  /* Background colors */
  --background: #ffffff;
  --background-alt: #f8fafc;
  --background-dark: #0f172a;
  
  /* Border colors */
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --border-dark: #334155;
  
  /* Accent colors - Blue theme per design spec */
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-blue-dark: #2563eb;
  
  /* Status colors - per design spec */
  --success: #10b981;
  --success-light: #34d399;
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --error: #ef4444;
  --error-light: #f87171;
  --info: #3b82f6;
  --info-light: #60a5fa;
  
  /* Secondary colors - Slate Gray */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  
  /* Dark mode colors - per design spec */
  --dark-background: #0f172a;
  --dark-text: #f1f5f9;
  --dark-cards: #1e293b;
  --dark-borders: #334155;
  
  /* Gradients - Navy blue theme */
  --primary-gradient: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
  --primary-gradient-text: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
  --subtle-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  
  /* Shadows - Subtle per design spec */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);

  /* Spacing System - 8px base unit */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
}

/* Utility classes for colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-inverse { color: var(--text-inverse); }

.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.text-info { color: var(--info); }

.bg-primary { background-color: var(--primary-navy); }
.bg-secondary { background-color: var(--slate-100); }
.bg-accent { background-color: var(--accent-blue); }
.bg-success { background-color: var(--success); }
.bg-warning { background-color: var(--warning); }
.bg-error { background-color: var(--error); }
.bg-info { background-color: var(--info); }

.bg-gradient-primary {
  background: var(--primary-gradient);
}

.bg-gradient-subtle {
  background: var(--subtle-gradient);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --background: var(--dark-background);
    --background-alt: var(--dark-cards);
    --text-primary: var(--dark-text);
    --text-secondary: var(--slate-400);
    --border: var(--dark-borders);
  }
}

/* Manual dark mode toggle support */
.dark-mode {
  --background: var(--dark-background);
  --background-alt: var(--dark-cards);
  --text-primary: var(--dark-text);
  --text-secondary: var(--slate-400);
  --border: var(--dark-borders);
}

/* Color transitions */
.color-transition {
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}