/**
 * CMPC Flow Board - CSS Variables
 * Version: 1.7.8
 * 
 * Centralized CSS custom properties (variables) for the application.
 * Step 6.2 of Refactoring Plan - CSS Consolidation
 * 
 * This file defines:
 * - Color palette
 * - Typography scale
 * - Spacing scale
 * - Border styles
 * - Shadow/glow effects
 * - Gradients
 * - Animation/transitions
 * 
 * Theme overrides are in theme-*.css files
 */

:root {
  /* ===========================================
     COLOR PALETTE - CMPC Green Theme
     =========================================== */
  
  /* Primary Brand Colors (CMPC Green) */
  --color-brand-darkest: #1B5E20;   /* Deep forest */
  --color-brand-dark: #2E7D32;      /* Forest green - PRIMARY */
  --color-brand-mid: #388E3C;       /* Medium green */
  --color-brand-light: #4CAF50;     /* CMPC green */
  --color-brand-bright: #8BC34A;    /* Leaf green */
  
  /* Semantic Colors */
  --color-primary: var(--color-brand-dark);
  --color-primary-hover: var(--color-brand-darkest);
  --color-secondary: var(--color-brand-light);
  --color-accent: var(--color-brand-mid);
  
  /* Action Colors (for buttons/interactive elements) */
  --color-action: var(--color-brand-dark);
  --color-action-hover: var(--color-brand-darkest);
  
  /* CMPC Green Palette Aliases (for backward compatibility) */
  --cmpc-green-dark: var(--color-brand-darkest);
  --cmpc-green: var(--color-brand-dark);
  --cmpc-green-mid: var(--color-brand-mid);
  --cmpc-green-light: var(--color-brand-light);
  --cmpc-green-bright: var(--color-brand-bright);
  
  /* Status Colors */
  --color-success: #2E7D32;
  --color-warning: #f97316;
  --color-error: #ef4444;
  --color-info: #1e88e5;
  
  /* Accent Colors */
  --accent-blue: #1e88e5;
  --accent-blue-hover: #2196f3;
  --accent-blue-bright: #3b82f6;
  --accent-cyan: #26c6da;
  --accent-teal: #00A86B;
  --accent-green: var(--color-brand-dark);
  --accent-green-light: var(--color-brand-light);
  --accent-green-bright: #22c55e;
  --accent-green-dark: #16a34a;
  --accent-red: #ef4444;
  --accent-red-dark: #dc2626;
  --accent-orange: #f97316;
  --accent-orange-dark: #ea580c;
  --accent-yellow: #eab308;
  --accent-yellow-dark: #ca8a04;
  --accent-purple: var(--color-brand-dark); /* Maps to CMPC Green */
  --accent-purple-light: #a78bfa;
  --accent-purple-mid: #8b5cf6;
  --accent-purple-dark: #7c3aed;
  --accent-indigo: #6366f1;
  --accent-teal-bright: #14b8a6;
  --accent-teal-dark: #008B5B;
  --accent-emerald: #10b981;
  --accent-emerald-dark: #059669;
  --accent-amber: #fbbf24;
  --accent-amber-dark: #f59e0b;
  --accent-amber-darker: #d97706;
  --accent-amber-light: #fcd34d;
  --accent-brown: #92400e;
  --accent-coral: #ff6b6b;
  --accent-coral-light: #ff8e53;
  --accent-sky: #60a5fa;
  --accent-sky-light: #60A5FA;
  
  /* Gray scale (for text and UI elements) */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Special dark backgrounds for legendary/premium cards */
  --bg-legendary-dark: #1a1a2e;
  --bg-legendary-mid: #16213e;
  
  /* ===========================================
     BACKGROUNDS - Deep Navy Theme
     =========================================== */
  
  --bg-primary: #0a1929;       /* Main app background */
  --bg-secondary: #0d2137;     /* Header, cards */
  --bg-tertiary: #051525;      /* Darker areas */
  --bg-card: #0d2137;          /* Card background */
  --bg-card-hover: #112840;    /* Card hover state */
  --bg-input: #0a1929;         /* Input fields */
  --bg-modal: #0d2137;         /* Modal background */
  --bg-overlay: rgba(0, 0, 0, 0.7);
  
  /* Surface colors (alias for components) */
  --color-surface: var(--bg-card);
  --color-background: var(--bg-primary);
  
  /* ===========================================
     TEXT COLORS
     =========================================== */
  
  --text-primary: #ffffff;
  --text-secondary: #b0bec5;
  --text-muted: #78909c;
  --text-disabled: #546e7a;
  --text-title: var(--accent-cyan);
  --text-link: var(--accent-blue);
  --text-link-hover: var(--accent-blue-hover);
  
  /* ===========================================
     BORDERS
     =========================================== */
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.15);
  --border-active: var(--color-brand-light);
  --border-error: var(--color-error);
  --border-focus: var(--accent-blue);
  
  --border-width: 1px;
  --border-width-thick: 2px;
  
  /* ===========================================
     BORDER RADIUS
     =========================================== */
  
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-pill: 9999px;
  --radius-full: 50%;
  
  /* ===========================================
     SHADOWS & GLOWS
     =========================================== */
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.4);
  
  --shadow-card: var(--shadow-md);
  --shadow-modal: var(--shadow-xl);
  --shadow-dropdown: var(--shadow-lg);
  
  /* Glow effects */
  --glow-cyan: 0 0 12px rgba(38, 198, 218, 0.3);
  --glow-blue: 0 0 12px rgba(30, 136, 229, 0.3);
  --glow-green: 0 0 12px rgba(46, 125, 50, 0.4);
  --glow-error: 0 0 12px rgba(239, 68, 68, 0.3);
  
  /* ===========================================
     GRADIENTS
     =========================================== */
  
  --gradient-header: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  --gradient-card: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  --gradient-green: linear-gradient(135deg, var(--color-brand-dark) 0%, var(--color-brand-darkest) 100%);
  --gradient-level: var(--gradient-green);
  --gradient-button: linear-gradient(135deg, var(--color-brand-mid) 0%, var(--color-brand-dark) 100%);
  
  /* ===========================================
     TYPOGRAPHY
     =========================================== */
  
  /* Font Family */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
  
  /* Font Sizes */
  --font-2xs: 10px;
  --font-xs: 11px;
  --font-sm: 12px;
  --font-base: 14px;
  --font-md: 15px;
  --font-lg: 18px;
  --font-xl: 22px;
  --font-2xl: 28px;
  --font-3xl: 36px;
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* ===========================================
     SPACING SCALE
     =========================================== */
  
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  
  /* Component-specific spacing */
  --spacing-card: var(--space-4);
  --spacing-section: var(--space-6);
  --spacing-page: var(--space-8);
  
  /* ===========================================
     Z-INDEX SCALE
     =========================================== */
  
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
  --z-max: 9999;
  
  /* ===========================================
     TRANSITIONS & ANIMATIONS
     =========================================== */
  
  /* Duration */
  --duration-fast: 100ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 500ms;
  
  /* Easing */
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Common transitions */
  --transition-colors: color var(--duration-normal) var(--ease-in-out),
                       background-color var(--duration-normal) var(--ease-in-out),
                       border-color var(--duration-normal) var(--ease-in-out);
  --transition-transform: transform var(--duration-normal) var(--ease-out);
  --transition-opacity: opacity var(--duration-normal) var(--ease-in-out);
  --transition-all: all var(--duration-normal) var(--ease-in-out);
  
  /* ===========================================
     COMPONENT TOKENS
     =========================================== */
  
  /* Buttons */
  --btn-height-sm: 28px;
  --btn-height-md: 36px;
  --btn-height-lg: 44px;
  --btn-padding-x: var(--space-4);
  --btn-padding-x-sm: var(--space-3);
  --btn-padding-x-lg: var(--space-6);
  
  /* Inputs */
  --input-height: 40px;
  --input-height-sm: 32px;
  --input-height-lg: 48px;
  --input-padding-x: var(--space-3);
  
  /* Cards */
  --card-padding: var(--space-4);
  --card-radius: var(--radius-lg);
  --card-shadow: var(--shadow-card);
  
  /* ===========================================
     BREAKPOINTS (for reference in JS)
     =========================================== */
  
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ===========================================
   DARK THEME ADJUSTMENTS (if needed)
   =========================================== */

@media (prefers-color-scheme: dark) {
  :root {
    /* Already dark by default, no changes needed */
  }
}

/* ===========================================
   REDUCED MOTION
   =========================================== */

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
    --duration-slower: 0ms;
  }
}