/**
 * Design Tokens - Leave Tracker Design System
 * Based on oklch color space for perceptual uniformity
 * Supports light and dark mode
 */

:root {
  /* ==================== Color System (oklch) ==================== */

  /* Background & Foreground */
  --background: oklch(1 0 0);
  --foreground: oklch(0.141 0.005 285.823);

  /* Card & Popover */
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.141 0.005 285.823);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.141 0.005 285.823);

  /* Primary */
  --primary: oklch(0.21 0.006 285.885);
  --primary-foreground: oklch(0.985 0 0);

  /* Secondary */
  --secondary: oklch(0.967 0.001 286.375);
  --secondary-foreground: oklch(0.21 0.006 285.885);

  /* Muted */
  --muted: oklch(0.967 0.001 286.375);
  --muted-foreground: oklch(0.552 0.016 285.938);

  /* Accent */
  --accent: oklch(0.967 0.001 286.375);
  --accent-foreground: oklch(0.21 0.006 285.885);

  /* Semantic Colors */
  --destructive: oklch(0.577 0.245 27.325);
  --success: oklch(0.627 0.194 149.214);
  --warning: oklch(0.769 0.188 70.08);
  --info: oklch(0.623 0.214 259.815);

  /* Borders & Inputs */
  --border: oklch(0.92 0.004 286.32);
  --input: oklch(0.92 0.004 286.32);
  --ring: oklch(0.871 0.006 286.286);

  /* Chart Colors */
  --chart-1: oklch(0.646 0.222 41.116);
  --chart-2: oklch(0.6 0.118 184.704);
  --chart-3: oklch(0.398 0.07 227.392);
  --chart-4: oklch(0.828 0.189 84.429);
  --chart-5: oklch(0.769 0.188 70.08);

  /* Sidebar */
  --sidebar: oklch(0.985 0 0);
  --sidebar-foreground: oklch(0.141 0.005 285.823);
  --sidebar-primary: oklch(0.21 0.006 285.885);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.967 0.001 286.375);
  --sidebar-accent-foreground: oklch(0.21 0.006 285.885);
  --sidebar-border: oklch(0.92 0.004 286.32);
  --sidebar-ring: oklch(0.871 0.006 286.286);

  /* ==================== Spacing Scale ==================== */
  --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 */

  /* Semantic spacing aliases */
  --space-xs: var(--space-1);
  --space-sm: var(--space-2);
  --space-md: var(--space-4);
  --space-lg: var(--space-6);
  --space-xl: var(--space-8);
  --space-2xl: var(--space-12);

  /* ==================== Border Radius ==================== */
  --radius-none: 0;
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;

  /* ==================== Shadows ==================== */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* ==================== Typography ==================== */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco, Consolas, monospace;

  /* Font sizes */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.25rem;    /* 36px */

  /* Line heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Font weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* ==================== Transitions ==================== */
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --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);

  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 500ms;

  /* Shorthand transitions */
  --transition-fast: var(--duration-fast) var(--ease-default);
  --transition-base: var(--duration-base) var(--ease-default);
  --transition-slow: var(--duration-slow) var(--ease-default);

  /* ==================== Z-Index Scale ==================== */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ==================== Dark Mode ==================== */
.dark {
  /* Background & Foreground */
  --background: oklch(0.141 0.005 285.823);
  --foreground: oklch(0.985 0 0);

  /* Card & Popover */
  --card: oklch(0.21 0.006 285.885);
  --card-foreground: oklch(0.985 0 0);
  --popover: oklch(0.21 0.006 285.885);
  --popover-foreground: oklch(0.985 0 0);

  /* Primary */
  --primary: oklch(0.92 0.004 286.32);
  --primary-foreground: oklch(0.21 0.006 285.885);

  /* Secondary */
  --secondary: oklch(0.274 0.006 286.033);
  --secondary-foreground: oklch(0.985 0 0);

  /* Muted */
  --muted: oklch(0.274 0.006 286.033);
  --muted-foreground: oklch(0.705 0.015 286.067);

  /* Accent */
  --accent: oklch(0.274 0.006 286.033);
  --accent-foreground: oklch(0.985 0 0);

  /* Semantic Colors */
  --destructive: oklch(0.704 0.191 22.216);
  --success: oklch(0.696 0.17 162.48);
  --warning: oklch(0.769 0.188 70.08);
  --info: oklch(0.488 0.243 264.376);

  /* Borders & Inputs */
  --border: oklch(0.274 0.006 286.033);
  --input: oklch(0.274 0.006 286.033);
  --ring: oklch(0.442 0.017 285.786);

  /* Chart Colors */
  --chart-1: oklch(0.488 0.243 264.376);
  --chart-2: oklch(0.696 0.17 162.48);
  --chart-3: oklch(0.769 0.188 70.08);
  --chart-4: oklch(0.627 0.265 303.9);
  --chart-5: oklch(0.645 0.246 16.439);

  /* Sidebar */
  --sidebar: oklch(0.21 0.006 285.885);
  --sidebar-foreground: oklch(0.985 0 0);
  --sidebar-primary: oklch(0.488 0.243 264.376);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.274 0.006 286.033);
  --sidebar-accent-foreground: oklch(0.985 0 0);
  --sidebar-border: oklch(0.274 0.006 286.033);
  --sidebar-ring: oklch(0.442 0.017 285.786);

  /* Dark mode shadows (lighter) */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4), 0 8px 10px -6px rgb(0 0 0 / 0.4);
}