:root {
  /* IronDesk Color Palette - Orange, White, Black */
  --color-primary: #FF6B00;
  --color-primary-dark: #E65C00;
  --color-primary-light: #FF8533;
  --color-primary-hover: #CC4D00;
  --color-secondary: #1A1A1A;
  --color-secondary-light: #333333;
  --color-background: #FFFFFF;
  --color-surface: #F5F5F5;
  --color-surface-hover: #EEEEEE;
  --color-text: #1A1A1A;
  --color-text-light: #666666;
  --color-text-on-primary: #FFFFFF;
  --color-border: #E0E0E0;
  --color-border-focus: #FF6B00;
  --color-success: #2E7D32;
  --color-success-light: #4CAF50;
  --color-warning: #F57F17;
  --color-error: #C62828;
  --color-error-light: #EF5350;
  --color-info: #1565C0;
  --color-info-light: #2196F3;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  
  /* Container */
  --container-max: 1200px;
  --container-padding: 24px;
  
  /* Header */
  --header-height: 72px;
  --header-height-mobile: 64px;
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #1A1A1A;
    --color-surface: #2D2D2D;
    --color-surface-hover: #3D3D3D;
    --color-text: #FFFFFF;
    --color-text-light: #AAAAAA;
    --color-border: #3D3D3D;
  }
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-md);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* Selection colors */
::selection {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-light);
}