:root {
  /* Blender-inspired Dark Theme */
  
  /* Background Colors - Darker Blender Palette */
  --bg-primary: #181818;        /* Main background (darker) */
  --bg-secondary: #202020;      /* Panel backgrounds */
  --bg-tertiary: #2b2b2b;       /* Hover/active states */
  --bg-quaternary: #353535;     /* Selected/highlighted */
  --bg-overlay: rgba(24, 24, 24, 0.95);
  --bg-glass: rgba(32, 32, 32, 0.8);
  
  /* Border Colors */
  --border-primary: #404040;    /* Main borders (more muted) */
  --border-secondary: #4a4a4a;  /* Lighter borders */
  --border-accent: #569cd6;     /* Accent borders */
  --border-subtle: #2d2d2d;     /* Subtle separators */
  
  /* Text Colors */
  --text-primary: #d4d4d4;      /* Main text */
  --text-secondary: #a0a0a0;    /* Secondary text */
  --text-muted: #808080;        /* Disabled/muted text */
  --text-accent: #9cdcfe;       /* Accent text */
  --text-highlight: #569cd6;    /* Highlighted text */
  
  /* Icon Configuration */
  --icon-stroke-width: 0.5;     /* Configurable stroke width */
  --icon-size-sm: 14px;         /* Small icons */
  --icon-size-md: 16px;         /* Medium icons (default) */
  --icon-size-lg: 20px;         /* Large icons */
  --icon-opacity-normal: 0.8;   /* Normal icon opacity */
  --icon-opacity-hover: 1.0;    /* Hover icon opacity */
  --icon-opacity-disabled: 0.4; /* Disabled icon opacity */
  
  /* Spacing - Tighter for Blender-style */
  --spacing-xs: 2px;
  --spacing-sm: 4px;
  --spacing-md: 8px;
  --spacing-lg: 12px;
  --spacing-xl: 16px;
  --spacing-xxl: 24px;
  
  /* Typography */
  --font-size-xs: 10px;
  --font-size-sm: 11px;
  --font-size-md: 12px;
  --font-size-lg: 13px;
  --font-size-xl: 14px;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 600;
  
  /* Border Radius */
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  
  /* Transitions */
  --transition-fast: 0.1s ease;
  --transition-normal: 0.15s ease;
  --transition-slow: 0.25s ease;
  
  /* Shadows */
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-hard: 0 1px 4px rgba(0, 0, 0, 0.6);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.3);
  
  /* Layout Dimensions */
  --header-height: 28px;
  --toolbar-width: 48px;
  --sidebar-width: 240px;
  --properties-width: 280px;
  --statusbar-height: 24px;
  
  /* State Colors */
  --state-success: #4caf50;
  --state-warning: #ff9800;
  --state-error: #f44336;
  --state-info: #2196f3;
}

/* Global Reset & Base Styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  line-height: 1.3;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

/* Icon Base Styling */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: var(--icon-opacity-normal);
  transition: opacity var(--transition-fast);
}

.icon svg {
  stroke-width: var(--icon-stroke-width);
}

.icon:hover {
  opacity: var(--icon-opacity-hover);
}

.icon.disabled {
  opacity: var(--icon-opacity-disabled);
  pointer-events: none;
}

.icon.size-sm {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
}

.icon.size-md {
  width: var(--icon-size-md);
  height: var(--icon-size-md);
}

.icon.size-lg {
  width: var(--icon-size-lg);
  height: var(--icon-size-lg);
}

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

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-primary);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-secondary);
}

::-webkit-scrollbar-corner {
  background: var(--bg-primary);
}

/* Selection Styles */
::selection {
  background: var(--text-highlight);
  color: var(--bg-primary);
}

/* Focus Styles */
*:focus {
  outline: 1px solid var(--border-accent);
  outline-offset: -1px;
}

*:focus:not(:focus-visible) {
  outline: none;
}