/**
 * DESIGN TOKENS - FINANZ-RECHNER PWA
 * ==================================
 * Modern Fintech Design System
 * Version 2.0
 */

:root {
  /* ============================================
     COLOR PALETTE
     ============================================ */

  /* Primary Colors (Indigo - Main Brand) */
  --color-primary-50:  #F0F4FF;
  --color-primary-100: #E0EAFF;
  --color-primary-200: #C7D7FE;
  --color-primary-300: #A4BCFD;
  --color-primary-400: #818CF8;
  --color-primary-500: #6366F1;  /* Main Brand */
  --color-primary-600: #4F46E5;
  --color-primary-700: #4338CA;
  --color-primary-800: #3730A3;
  --color-primary-900: #312E81;

  /* Success Colors */
  --color-success-50:  #ECFDF5;
  --color-success-100: #D1FAE5;
  --color-success-200: #A7F3D0;
  --color-success-300: #6EE7B7;
  --color-success-400: #34D399;
  --color-success-500: #10B981;
  --color-success-600: #059669;
  --color-success-700: #047857;
  --color-success-800: #065F46;

  /* Warning Colors */
  --color-warning-50:  #FFFBEB;
  --color-warning-100: #FEF3C7;
  --color-warning-200: #FDE68A;
  --color-warning-300: #FCD34D;
  --color-warning-400: #FBBF24;
  --color-warning-500: #F59E0B;
  --color-warning-600: #D97706;
  --color-warning-700: #B45309;

  /* Error Colors */
  --color-error-50:  #FEF2F2;
  --color-error-100: #FEE2E2;
  --color-error-200: #FECACA;
  --color-error-300: #FCA5A5;
  --color-error-400: #F87171;
  --color-error-500: #EF4444;
  --color-error-600: #DC2626;
  --color-error-700: #B91C1C;

  /* Neutral Colors (Grayscale) */
  --color-neutral-50:  #FAFAFA;
  --color-neutral-100: #F5F5F5;
  --color-neutral-200: #E5E5E5;
  --color-neutral-300: #D4D4D4;
  --color-neutral-400: #A3A3A3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;
  --color-neutral-950: #0A0A0A;

  /* Accent Colors */
  --color-accent-cyan:   #06B6D4;
  --color-accent-purple: #A855F7;
  --color-accent-pink:   #EC4899;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --gradient-success: linear-gradient(135deg, #10B981 0%, #059669 100%);
  --gradient-warning: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  --gradient-error:   linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  --gradient-hero:    linear-gradient(135deg, #667EEA 0%, #764BA2 50%, #F093FB 100%);
  --gradient-glass:   linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
  --gradient-mesh:    radial-gradient(at 40% 20%, rgba(99,102,241,0.3) 0%, transparent 50%),
                      radial-gradient(at 80% 0%, rgba(168,85,247,0.3) 0%, transparent 50%),
                      radial-gradient(at 0% 50%, rgba(236,72,153,0.3) 0%, transparent 50%);

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

  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Monaco', monospace;

  /* Font Sizes (Mobile First) */
  --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 */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */

  /* Font Weights */
  --font-light:     300;
  --font-regular:   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;

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

  /* ============================================
     SPACING (8px Base Grid)
     ============================================ */

  --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 */

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

  /* Container Widths */
  --container-sm:  640px;
  --container-md:  768px;
  --container-lg:  1024px;
  --container-xl:  1280px;
  --container-2xl: 1536px;

  /* Breakpoints (for reference in JS) */
  --breakpoint-sm:  640px;
  --breakpoint-md:  768px;
  --breakpoint-lg:  1024px;
  --breakpoint-xl:  1280px;
  --breakpoint-2xl: 1536px;

  /* ============================================
     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;   /* Circle */

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

  /* Elevation 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 50px 100px -20px rgba(0, 0, 0, 0.35);

  /* Inner Shadows */
  --shadow-inner:    inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --shadow-inner-lg: inset 0 4px 8px 0 rgba(0, 0, 0, 0.1);

  /* Colored Shadows */
  --shadow-primary: 0 10px 30px -5px rgba(99, 102, 241, 0.3);
  --shadow-success: 0 10px 30px -5px rgba(16, 185, 129, 0.3);
  --shadow-warning: 0 10px 30px -5px rgba(245, 158, 11, 0.3);
  --shadow-error:   0 10px 30px -5px rgba(239, 68, 68, 0.3);

  /* ============================================
     ANIMATIONS
     ============================================ */

  /* Durations */
  --duration-instant: 75ms;
  --duration-fast:    150ms;
  --duration-base:    200ms;
  --duration-slow:    300ms;
  --duration-slower:  500ms;
  --duration-glacial: 1000ms;

  /* Easing Functions */
  --ease-linear:   linear;
  --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(0.45, 0, 0.55, 1);

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

  --z-0:   0;
  --z-10:  10;
  --z-20:  20;
  --z-30:  30;
  --z-40:  40;
  --z-50:  50;
  --z-60:  60;
  --z-70:  70;
  --z-max: 9999;

  /* ============================================
     ICON SIZES
     ============================================ */

  --icon-xs:   16px;
  --icon-sm:   20px;
  --icon-base: 24px;
  --icon-lg:   32px;
  --icon-xl:   40px;
  --icon-2xl:  48px;

  /* ============================================
     BLUR & BACKDROP
     ============================================ */

  --blur-sm: 8px;
  --blur-base: 16px;
  --blur-lg: 24px;
  --blur-xl: 40px;

  /* ============================================
     SEMANTIC COLORS (Light Mode)
     ============================================ */

  --bg-primary:    var(--color-neutral-50);
  --bg-secondary:  #FFFFFF;
  --bg-tertiary:   var(--color-neutral-100);

  --text-primary:   var(--color-neutral-900);
  --text-secondary: var(--color-neutral-600);
  --text-tertiary:  var(--color-neutral-400);

  --border-primary:   var(--color-neutral-200);
  --border-secondary: var(--color-neutral-300);

  --surface-elevated: #FFFFFF;
  --surface-sunken:   var(--color-neutral-50);
}

/* ============================================
   DARK MODE
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark Mode Colors */
    --bg-primary:    var(--color-neutral-900);
    --bg-secondary:  var(--color-neutral-800);
    --bg-tertiary:   var(--color-neutral-700);

    --text-primary:   var(--color-neutral-50);
    --text-secondary: var(--color-neutral-300);
    --text-tertiary:  var(--color-neutral-500);

    --border-primary:   var(--color-neutral-700);
    --border-secondary: var(--color-neutral-600);

    --surface-elevated: var(--color-neutral-800);
    --surface-sunken:   var(--color-neutral-950);

    /* Adjust 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);
    --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-md:   0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-lg:   0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --shadow-xl:   0 25px 50px -12px rgba(0, 0, 0, 0.7);
  }
}

/* ============================================
   RESPONSIVE FONT SIZES (Desktop)
   ============================================ */

@media (min-width: 1024px) {
  :root {
    --text-4xl: 2.5rem;    /* 40px */
    --text-5xl: 3.5rem;    /* 56px */
    --text-6xl: 4.5rem;    /* 72px */
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  :root {
    --shadow-xs: none;
    --shadow-sm: none;
    --shadow-base: none;
    --shadow-md: none;
    --shadow-lg: none;
    --shadow-xl: none;
    --shadow-2xl: none;
  }
}

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

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}