/**
 * SuchyConsulting.de - CSS Custom Properties (Variables)
 * Modern, maintainable, and scalable design system
 * Version: 2.0
 */

:root {
  /* ==========================================================================
     COLOR SYSTEM
     ========================================================================== */

  /* Primary Colors - Modern Purple/Violet (Unified Brand Color) */
  --color-primary: #667eea;
  --color-primary-light: #8b9bff;
  --color-primary-dark: #5568d3;
  --color-primary-50: #f5f7ff;
  --color-primary-100: #e8ebff;
  --color-primary-200: #d1d7fe;
  --color-primary-600: #5568d3;
  --color-primary-900: #3d4ab8;

  /* Secondary Colors - Purple Accent */
  --color-secondary: #8B5CF6;
  --color-secondary-light: #a78bfa;
  --color-secondary-dark: #7c3aed;
  --color-secondary-50: #fffbeb;
  --color-secondary-100: #fef3c7;

  /* Neutral Colors - Grays */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-success-light: #34d399;
  --color-success-dark: #059669;
  --color-warning: #8B5CF6;
  --color-warning-light: #a78bfa;
  --color-warning-dark: #7c3aed;
  --color-error: #ef4444;
  --color-error-light: #f87171;
  --color-error-dark: #dc2626;
  --color-info: #3b82f6;
  --color-info-light: #60a5fa;
  --color-info-dark: #2563eb;

  /* Background Colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: var(--color-gray-50);
  --color-bg-tertiary: var(--color-gray-100);
  --color-bg-dark: var(--color-gray-900);

  /* Text Colors */
  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-tertiary: var(--color-gray-500);
  --color-text-inverse: #ffffff;
  --color-text-link: var(--color-primary);
  --color-text-link-hover: var(--color-primary-dark);

  /* Border Colors */
  --color-border-light: var(--color-gray-200);
  --color-border-medium: var(--color-gray-300);
  --color-border-dark: var(--color-gray-400);

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

  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Inter Display', var(--font-primary);
  --font-mono: 'Fira Code', 'Courier New', monospace;

  /* SIMPLIFIED TYPOGRAPHY - 3 SIZES ONLY (Footer excluded) */
  --font-sm: 1rem;      /* 16px - Body, Navigation, Buttons, Forms */
  --font-md: 1.5rem;    /* 24px - H3, Subtitles, Card Titles */
  --font-lg: 3rem;      /* 48px - H1, H2, Hero Headlines */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-snug: 1.375;
  --line-height-normal: 1.65;  /* +10% luftiger (war 1.5) */
  --line-height-relaxed: 1.75;  /* +7.7% luftiger (war 1.625) */
  --line-height-loose: 2;

  /* Letter Spacing */
  --letter-spacing-tighter: -0.05em;
  --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 */
  --space-40: 10rem;    /* 160px */
  --space-48: 12rem;    /* 192px */
  --space-56: 14rem;    /* 224px */
  --space-64: 16rem;    /* 256px */

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

  /* Container Widths */
  --container-xs: 480px;
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;

  /* Z-Index Scale */
  --z-negative: -1;
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-tooltip: 1600;
  --z-notification: 1700;
  --z-maximum: 9999;

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

  /* ==========================================================================
     BORDERS & RADII
     ========================================================================== */

  /* Border Widths */
  --border-width-0: 0;
  --border-width-1: 1px;
  --border-width-2: 2px;
  --border-width-4: 4px;
  --border-width-8: 8px;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;    /* 2px */
  --radius-base: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;    /* 6px */
  --radius-lg: 0.5rem;      /* 8px */
  --radius-xl: 0.75rem;     /* 12px */
  --radius-2xl: 1rem;       /* 16px */
  --radius-3xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;    /* Fully rounded */

  /* ==========================================================================
     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, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);

  /* Colored Shadows */
  --shadow-primary: 0 10px 15px -3px rgba(30, 64, 175, 0.2);
  --shadow-secondary: 0 10px 15px -3px rgba(245, 158, 11, 0.2);
  --shadow-success: 0 10px 15px -3px rgba(16, 185, 129, 0.2);
  --shadow-error: 0 10px 15px -3px rgba(239, 68, 68, 0.2);

  /* ==========================================================================
     TRANSITIONS & ANIMATIONS
     ========================================================================== */

  /* Duration */
  --duration-75: 75ms;
  --duration-100: 100ms;
  --duration-150: 150ms;
  --duration-200: 200ms;
  --duration-300: 300ms;
  --duration-500: 500ms;
  --duration-700: 700ms;
  --duration-1000: 1000ms;

  /* Timing 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);

  /* Common Transitions */
  --transition-base: all var(--duration-200) var(--ease-out);
  --transition-fast: all var(--duration-150) var(--ease-out);
  --transition-slow: all var(--duration-300) var(--ease-in-out);
  --transition-colors: color var(--duration-200) var(--ease-out),
                       background-color var(--duration-200) var(--ease-out),
                       border-color var(--duration-200) var(--ease-out);
  --transition-transform: transform var(--duration-200) var(--ease-out);
  --transition-opacity: opacity var(--duration-200) var(--ease-out);

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

  /* Opacity */
  --opacity-0: 0;
  --opacity-5: 0.05;
  --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;

  /* Blur */
  --blur-none: 0;
  --blur-sm: 4px;
  --blur-base: 8px;
  --blur-md: 12px;
  --blur-lg: 16px;
  --blur-xl: 24px;
  --blur-2xl: 40px;
  --blur-3xl: 64px;

  /* Backdrop Blur (for glassmorphism) */
  --backdrop-blur-sm: blur(4px);
  --backdrop-blur-base: blur(8px);
  --backdrop-blur-md: blur(12px);
  --backdrop-blur-lg: blur(16px);
  --backdrop-blur-xl: blur(24px);
}

/* ==========================================================================
   DARK MODE VARIABLES (Prepared for future implementation)
   ========================================================================== */

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode colors - currently not active but prepared */
    --color-bg-primary-dark: var(--color-gray-900);
    --color-bg-secondary-dark: var(--color-gray-800);
    --color-bg-tertiary-dark: var(--color-gray-700);
    --color-text-primary-dark: var(--color-gray-50);
    --color-text-secondary-dark: var(--color-gray-300);
    --color-text-tertiary-dark: var(--color-gray-400);
    --color-border-light-dark: var(--color-gray-700);
    --color-border-medium-dark: var(--color-gray-600);
    --color-border-dark-dark: var(--color-gray-500);
  }
}

/* Dark mode class-based toggle (for manual control) */
.dark-mode {
  --color-bg-primary: var(--color-gray-900);
  --color-bg-secondary: var(--color-gray-800);
  --color-bg-tertiary: var(--color-gray-700);
  --color-text-primary: var(--color-gray-50);
  --color-text-secondary: var(--color-gray-300);
  --color-text-tertiary: var(--color-gray-400);
  --color-border-light: var(--color-gray-700);
  --color-border-medium: var(--color-gray-600);
  --color-border-dark: var(--color-gray-500);
}

/* ==========================================================================
   UTILITY CLASSES (Optional - can be used directly)
   ========================================================================== */

/* Glassmorphism Effect */
.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: var(--backdrop-blur-base);
  -webkit-backdrop-filter: var(--backdrop-blur-base);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Gradient Overlays */
.gradient-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.gradient-secondary {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
}

.gradient-mesh {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-primary-dark) 100%);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

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

@media (max-width: 768px) {
  :root {
    /* Mobile Font Scaling */
    --font-sm: 0.9rem;   /* 14.4px */
    --font-md: 1.25rem;  /* 20px */
    --font-lg: 2rem;     /* 32px */
  }
}