/* ==========================================================================
   NavRun Design Tokens
   ========================================================================== */

:root {
  /* -------------------------------------------------------------------------
     Primary Palette
     ------------------------------------------------------------------------- */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1e40af;
  --color-primary-subtle: rgba(37, 99, 235, 0.1);

  /* Accent - Achievement Green */
  --color-accent: #10b981;
  --color-accent-dark: #059669;
  --color-accent-subtle: rgba(16, 185, 129, 0.1);

  /* -------------------------------------------------------------------------
     Run Type Colors
     ------------------------------------------------------------------------- */
  --color-easy: #22c55e;
  --color-long: #3b82f6;
  --color-tempo: #f59e0b;
  --color-interval: #ef4444;
  --color-recovery: #8b5cf6;
  --color-rest: #64748b;

  /* -------------------------------------------------------------------------
     Neutral Colors
     ------------------------------------------------------------------------- */
  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-raised: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-subtle: #94a3b8;

  /* -------------------------------------------------------------------------
     Semantic Colors
     ------------------------------------------------------------------------- */
  --color-success: #22c55e;
  --color-success-subtle: rgba(34, 197, 94, 0.1);
  --color-warning: #f59e0b;
  --color-warning-subtle: rgba(245, 158, 11, 0.1);
  --color-danger: #ef4444;
  --color-danger-subtle: rgba(239, 68, 68, 0.1);
  --color-info: #3b82f6;
  --color-info-subtle: rgba(59, 130, 246, 0.1);

  /* -------------------------------------------------------------------------
     Shadows
     ------------------------------------------------------------------------- */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);

  /* -------------------------------------------------------------------------
     Spacing Scale
     ------------------------------------------------------------------------- */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */

  /* -------------------------------------------------------------------------
     Border Radius
     ------------------------------------------------------------------------- */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-full: 9999px;

  /* -------------------------------------------------------------------------
     Transitions
     ------------------------------------------------------------------------- */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* -------------------------------------------------------------------------
     Typography
     ------------------------------------------------------------------------- */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", monospace;

  --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: 2rem;      /* 32px */
  --text-4xl: 2.5rem;    /* 40px */

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
}

/* ==========================================================================
   Dark Mode Variables
   ========================================================================== */

/* Automatic dark mode based on system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* -------------------------------------------------------------------------
       Neutral Colors - Dark Mode
       ------------------------------------------------------------------------- */
    --color-bg: #0f172a;
    --color-bg-subtle: #1e293b;
    --color-surface: #1e293b;
    --color-surface-raised: #334155;
    --color-border: #334155;
    --color-border-light: #475569;
    --color-text: #f1f5f9;
    --color-text-muted: #cbd5e1;
    --color-text-subtle: #94a3b8;

    /* -------------------------------------------------------------------------
       Primary Palette - Dark Mode Adjustments
       ------------------------------------------------------------------------- */
    --color-primary: #3b82f6;
    --color-primary-light: #60a5fa;
    --color-primary-dark: #2563eb;
    --color-primary-subtle: rgba(59, 130, 246, 0.15);

    /* Accent - Achievement Green - Dark Mode */
    --color-accent: #10b981;
    --color-accent-dark: #059669;
    --color-accent-subtle: rgba(16, 185, 129, 0.15);

    /* -------------------------------------------------------------------------
       Run Type Colors - Dark Mode (slightly brighter)
       ------------------------------------------------------------------------- */
    --color-easy: #34d399;
    --color-long: #60a5fa;
    --color-tempo: #fbbf24;
    --color-interval: #f87171;
    --color-recovery: #a78bfa;
    --color-rest: #94a3b8;

    /* -------------------------------------------------------------------------
       Semantic Colors - Dark Mode
       ------------------------------------------------------------------------- */
    --color-success: #34d399;
    --color-success-subtle: rgba(52, 211, 153, 0.15);
    --color-warning: #fbbf24;
    --color-warning-subtle: rgba(251, 191, 36, 0.15);
    --color-danger: #f87171;
    --color-danger-subtle: rgba(248, 113, 113, 0.15);
    --color-info: #60a5fa;
    --color-info-subtle: rgba(96, 165, 250, 0.15);

    /* -------------------------------------------------------------------------
       Shadows - Dark Mode (lighter shadows for depth)
       ------------------------------------------------------------------------- */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.6), 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.7), 0 10px 10px rgba(0, 0, 0, 0.5);
  }
}

/* Manual dark mode override (when user explicitly selects dark mode) */
[data-theme="dark"] {
  /* -------------------------------------------------------------------------
     Neutral Colors - Dark Mode
     ------------------------------------------------------------------------- */
  --color-bg: #0f172a;
  --color-bg-subtle: #1e293b;
  --color-surface: #1e293b;
  --color-surface-raised: #334155;
  --color-border: #334155;
  --color-border-light: #475569;
  --color-text: #f1f5f9;
  --color-text-muted: #cbd5e1;
  --color-text-subtle: #94a3b8;

  /* -------------------------------------------------------------------------
     Primary Palette - Dark Mode Adjustments
     ------------------------------------------------------------------------- */
  --color-primary: #3b82f6;
  --color-primary-light: #60a5fa;
  --color-primary-dark: #2563eb;
  --color-primary-subtle: rgba(59, 130, 246, 0.15);

  /* Accent - Achievement Green - Dark Mode */
  --color-accent: #10b981;
  --color-accent-dark: #059669;
  --color-accent-subtle: rgba(16, 185, 129, 0.15);

  /* -------------------------------------------------------------------------
     Run Type Colors - Dark Mode (slightly brighter)
     ------------------------------------------------------------------------- */
  --color-easy: #34d399;
  --color-long: #60a5fa;
  --color-tempo: #fbbf24;
  --color-interval: #f87171;
  --color-recovery: #a78bfa;
  --color-rest: #94a3b8;

  /* -------------------------------------------------------------------------
     Semantic Colors - Dark Mode
     ------------------------------------------------------------------------- */
  --color-success: #34d399;
  --color-success-subtle: rgba(52, 211, 153, 0.15);
  --color-warning: #fbbf24;
  --color-warning-subtle: rgba(251, 191, 36, 0.15);
  --color-danger: #f87171;
  --color-danger-subtle: rgba(248, 113, 113, 0.15);
  --color-info: #60a5fa;
  --color-info-subtle: rgba(96, 165, 250, 0.15);

  /* -------------------------------------------------------------------------
     Shadows - Dark Mode (lighter shadows for depth)
     ------------------------------------------------------------------------- */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.6), 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.7), 0 10px 10px rgba(0, 0, 0, 0.5);
}

/* Smooth color transitions for theme switching */
:root,
:root * {
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base);
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  :root,
  :root * {
    transition-duration: 0.01ms !important;
  }
}