/**
 * Design System - CSS Custom Properties
 * Cooking School Booking - Premium Version
 */

:root {
  /* ============================================
     COLOR PALETTE - Light Mode
     ============================================ */

  /* Primary Colors - Coral Theme */
  --color-primary-50: #fef5f3;
  --color-primary-100: #fde8e3;
  --color-primary-200: #fbd4cb;
  --color-primary-300: #f7afa3;
  --color-primary-400: #f08b7a;
  --color-primary-500: #E27D60;
  --color-primary-600: #d96f52;
  --color-primary-700: #c25a43;
  --color-primary-800: #9f4937;
  --color-primary-900: #7e3a2d;

  /* Secondary Colors - Teal Theme */
  --color-secondary-50: #f0faf9;
  --color-secondary-100: #d6f1ed;
  --color-secondary-200: #ade3db;
  --color-secondary-300: #7eceC4;
  --color-secondary-400: #41B3A3;
  --color-secondary-500: #3a9d8f;
  --color-secondary-600: #317e73;
  --color-secondary-700: #2a675d;
  --color-secondary-800: #24534b;
  --color-secondary-900: #1f453f;

  /* Accent Colors - Cooking/Food Theme */
  --color-accent-coral: #E27D60;
  --color-accent-cream: #FFF8F0;
  --color-accent-charcoal: #2C3E50;
  --color-accent-teal: #41B3A3;

  /* Neutral Colors */
  --color-neutral-0: #ffffff;
  --color-neutral-50: #FFF8E7;
  --color-neutral-100: #f9f5ed;
  --color-neutral-200: #f0ebe0;
  --color-neutral-300: #d9d4c8;
  --color-neutral-400: #a8a49a;
  --color-neutral-500: #787468;
  --color-neutral-600: #5a5650;
  --color-neutral-700: #44413d;
  --color-neutral-800: #2C3E50;
  --color-neutral-900: #1a2632;
  --color-neutral-950: #0f151c;

  /* Semantic Colors */
  --color-success: #41B3A3;
  --color-warning: #E27D60;
  --color-error: #d9534f;
  --color-info: #41B3A3;

  /* Background Colors - Warm Cream Theme */
  --color-bg-primary: #FFF8F0;
  --color-bg-secondary: #ffffff;
  --color-bg-tertiary: #fef6ee;
  --color-bg-overlay: rgba(44, 62, 80, 0.7);

  /* Text Colors - Warm Contrast */
  --color-text-primary: #2C3E50;
  --color-text-secondary: #5a5650;
  --color-text-tertiary: #787468;
  --color-text-inverse: #ffffff;

  /* Border Colors - Soft & Warm */
  --color-border-light: #f0ebe0;
  --color-border-medium: #d9d4c8;
  --color-border-dark: #a8a49a;

  /* ============================================
     GRADIENTS - Simple & Clean
     ============================================ */

  --gradient-primary: linear-gradient(135deg, #E27D60 0%, #d96f52 100%);
  --gradient-secondary: linear-gradient(135deg, #41B3A3 0%, #3a9d8f 100%);
  --gradient-warm: linear-gradient(135deg, #E27D60 0%, #c25a43 100%);
  --gradient-cool: linear-gradient(135deg, #41B3A3 0%, #317e73 100%);
  --gradient-sunset: linear-gradient(135deg, #E27D60 0%, #d96f52 100%);
  --gradient-ocean: linear-gradient(135deg, #41B3A3 0%, #E27D60 100%);

  /* Glassmorphism */
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  --gradient-glass-border: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));

  /* ============================================
     TYPOGRAPHY
     ============================================ */

  /* Font Families */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

  /* Font Sizes - Modular Scale (1.250 - Major Third) */
  --font-size-xs: 0.64rem;      /* 10.24px */
  --font-size-sm: 0.8rem;       /* 12.8px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-md: 1.25rem;      /* 20px */
  --font-size-lg: 1.563rem;     /* 25px */
  --font-size-xl: 1.953rem;     /* 31.25px */
  --font-size-2xl: 2.441rem;    /* 39.06px */
  --font-size-3xl: 3.052rem;    /* 48.83px */
  --font-size-4xl: 3.815rem;    /* 61.04px */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.1em;

  /* ============================================
     SPACING - 8px Grid System
     ============================================ */

  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* ============================================
     BORDER RADIUS
     ============================================ */

  --radius-none: 0;
  --radius-sm: 0.25rem;     /* 4px */
  --radius-base: 0.5rem;    /* 8px */
  --radius-md: 0.75rem;     /* 12px */
  --radius-lg: 1rem;        /* 16px */
  --radius-xl: 1.5rem;      /* 24px */
  --radius-2xl: 2rem;       /* 32px */
  --radius-full: 9999px;

  /* ============================================
     SHADOWS
     ============================================ */

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.3);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);

  /* Colored Shadows */
  --shadow-primary: 0 10px 40px -10px rgba(226, 125, 96, 0.3);
  --shadow-secondary: 0 10px 40px -10px rgba(65, 179, 163, 0.3);
  --shadow-success: 0 10px 40px -10px rgba(65, 179, 163, 0.3);

  /* ============================================
     Z-INDEX SCALE
     ============================================ */

  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;

  /* ============================================
     TRANSITIONS
     ============================================ */

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Easing Functions */
  --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);
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* ============================================
     BREAKPOINTS (for reference in media queries)
     ============================================ */

  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* ============================================
     LAYOUT
     ============================================ */

  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;

  --content-max-width: 1400px;
  --content-padding: var(--space-4);

  /* ============================================
     COMPONENT SPECIFIC
     ============================================ */

  /* Buttons */
  --button-height-sm: 2rem;
  --button-height-base: 2.5rem;
  --button-height-lg: 3rem;
  --button-height-xl: 3.5rem;

  /* Input Fields */
  --input-height: 3rem;
  --input-border-width: 1px;
  --input-focus-ring: 0 0 0 3px rgba(139, 92, 246, 0.1);

  /* Cards */
  --card-padding: var(--space-6);
  --card-radius: var(--radius-xl);

  /* Modals */
  --modal-max-width: 600px;
  --modal-backdrop-blur: 8px;

  /* ============================================
     EFFECTS
     ============================================ */

  --blur-sm: 4px;
  --blur-base: 8px;
  --blur-md: 12px;
  --blur-lg: 16px;
  --blur-xl: 24px;

  --opacity-0: 0;
  --opacity-10: 0.1;
  --opacity-20: 0.2;
  --opacity-30: 0.3;
  --opacity-40: 0.4;
  --opacity-50: 0.5;
  --opacity-60: 0.6;
  --opacity-70: 0.7;
  --opacity-80: 0.8;
  --opacity-90: 0.9;
  --opacity-100: 1;
}

/* ============================================
   DARK MODE COLOR OVERRIDES
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* Background Colors */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #171717;
    --color-bg-tertiary: #262626;
    --color-bg-overlay: rgba(0, 0, 0, 0.7);

    /* Text Colors */
    --color-text-primary: #fafafa;
    --color-text-secondary: #d4d4d4;
    --color-text-tertiary: #a3a3a3;
    --color-text-inverse: #0a0a0a;

    /* Border Colors */
    --color-border-light: #262626;
    --color-border-medium: #404040;
    --color-border-dark: #525252;

    /* Glassmorphism for dark mode */
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    --gradient-glass-border: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));

    /* Shadows for dark mode */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
    --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.6);
  }
}

/* Force light mode */
[data-theme="light"] {
  color-scheme: light;
}

/* Force dark mode */
[data-theme="dark"] {
  color-scheme: dark;

  /* Same overrides as prefer-color-scheme dark */
  --color-bg-primary: #0a0a0a;
  --color-bg-secondary: #171717;
  --color-bg-tertiary: #262626;
  --color-bg-overlay: rgba(0, 0, 0, 0.7);
  --color-text-primary: #fafafa;
  --color-text-secondary: #d4d4d4;
  --color-text-tertiary: #a3a3a3;
  --color-text-inverse: #0a0a0a;
  --color-border-light: #262626;
  --color-border-medium: #404040;
  --color-border-dark: #525252;
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  --gradient-glass-border: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 35px 60px -15px rgba(0, 0, 0, 0.6);
}