// ============================================
// Theme Variables - Material Design 3 + Legacy Aliases
// ============================================
//
// This file provides legacy CSS variable aliases that map to M3 tokens.
// The actual M3 tokens are defined in scss/tokens.scss and scss/theme.scss.
// These aliases ensure backward compatibility with existing code.

:root {
  // ============================================
  // Legacy Color Aliases → M3 Tokens
  // ============================================

  // Primary colors
  --color-primary: var(--mat-sys-primary);
  --color-primary-dark: var(--mat-sys-primary);
  --color-primary-light: var(--mat-sys-primary-container);
  --color-primary-alpha: color-mix(in srgb, var(--mat-sys-primary) 20%, transparent);
  --color-secondary: var(--mat-sys-secondary);

  // Background colors → M3 surface hierarchy
  --color-bg: var(--mat-sys-surface);
  --color-bg-paper: var(--mat-sys-surface-container-low);
  --color-bg-elevated: var(--mat-sys-surface-container);
  --color-bg-hover: color-mix(in srgb, var(--mat-sys-on-surface) 8%, transparent);

  // Text colors → M3 on-surface variants
  --color-text: var(--mat-sys-on-surface);
  --color-text-secondary: var(--mat-sys-on-surface-variant);
  --color-text-disabled: color-mix(in srgb, var(--mat-sys-on-surface) 38%, transparent);

  // Border/divider colors → M3 outline
  --color-border: var(--mat-sys-outline);
  --color-divider: var(--mat-sys-outline-variant);

  // ============================================
  // Extended Semantic Colors (not in M3 spec)
  // ============================================
  // M3 only defines error. We extend with success/warning/info.
  // These follow M3 naming conventions: color, on-color, color-container, on-color-container

  // Success (green)
  --color-success: #4caf50;
  --color-on-success: #ffffff;
  --color-success-container: color-mix(in srgb, #4caf50 12%, var(--mat-sys-surface));
  --color-on-success-container: #2e7d32;

  // Warning (amber/orange)
  --color-warning: #ff9800;
  --color-on-warning: #000000;
  --color-warning-container: color-mix(in srgb, #ff9800 12%, var(--mat-sys-surface));
  --color-on-warning-container: #e65100;

  // Info (blue)
  --color-info: #2196f3;
  --color-on-info: #ffffff;
  --color-info-container: color-mix(in srgb, #2196f3 12%, var(--mat-sys-surface));
  --color-on-info-container: #0d47a1;

  // Search/Find highlight (yellow - universal standard)
  --color-search-highlight: #ffeb3b;
  --color-on-search-highlight: #000000;
  --color-search-highlight-current: #fdd835;
  --color-search-highlight-ring: #fbc02d;

  // Error (from M3)
  --color-error: var(--mat-sys-error);
  --color-on-error: var(--mat-sys-on-error);
  --color-error-container: var(--mat-sys-error-container);
  --color-on-error-container: var(--mat-sys-on-error-container);

  // Legacy background aliases
  --color-success-bg: var(--color-success-container);
  --color-warning-bg: var(--color-warning-container);
  --color-error-bg: var(--color-error-container);
  --color-info-bg: var(--color-info-container);

  // ============================================
  // Legacy Spacing Aliases (M3 uses 4px grid)
  // ============================================
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  // ============================================
  // Legacy Border Radius → M3 Corner Tokens
  // ============================================
  --radius-sm: var(--mat-sys-corner-small);
  --radius-md: var(--mat-sys-corner-medium);
  --radius-lg: var(--mat-sys-corner-large);
  --radius-full: var(--mat-sys-corner-full);

  // ============================================
  // Legacy Shadows → M3 Elevation Levels
  // ============================================
  --shadow-sm: var(--mat-sys-level1);
  --shadow-md: var(--mat-sys-level2);
  --shadow-lg: var(--mat-sys-level3);
  --shadow-xl: var(--mat-sys-level4);

  // ============================================
  // State Layer & Disabled Opacities (M3 spec)
  // ============================================
  --state-hover-opacity: 0.08;
  --state-focus-opacity: 0.12;
  --state-pressed-opacity: 0.12;
  --state-dragged-opacity: 0.16;
  --disabled-container-opacity: 0.12;
  --disabled-content-opacity: 0.38;

  // ============================================
  // Legacy Typography → M3 Type Scale
  // ============================================
  --font-family: var(--mat-sys-body-large-font);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;

  --font-size-xs: var(--mat-sys-label-small-size);
  --font-size-sm: var(--mat-sys-body-small-size);
  --font-size-md: var(--mat-sys-body-medium-size);
  --font-size-lg: var(--mat-sys-body-large-size);
  --font-size-xl: var(--mat-sys-title-large-size);
  --font-size-2xl: var(--mat-sys-headline-medium-size);

  // ============================================
  // Code Block Colors (extended theme)
  // ============================================
  --color-code-bg: var(--mat-sys-surface-container-highest);
  --color-code-text: var(--mat-sys-on-surface);
  --color-code-keyword: #569cd6;
  --color-code-string: #ce9178;
  --color-code-comment: #6a9955;
  --color-code-function: #dcdcaa;

  // ============================================
  // Legacy Transitions → M3 Motion Tokens
  // ============================================
  --transition-fast: var(--mat-sys-motion-duration-short4) var(--mat-sys-motion-easing-standard);
  --transition-normal: var(--mat-sys-motion-duration-medium2) var(--mat-sys-motion-easing-standard);
  --transition-slow: var(--mat-sys-motion-duration-long2) var(--mat-sys-motion-easing-standard);

  // ============================================
  // Z-index Layers (M3-aligned stacking order)
  // ============================================
  // Local stacking (within components)
  --z-local: 1;
  --z-local-elevated: 10;

  // Global stacking (overlays)
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-drawer: 1200;
  --z-modal: 1300;
  --z-snackbar: 1400;
  --z-tooltip: 1500;
  --z-overlay-max: 9999;
}

// ============================================
// Theme variant overrides are now handled by M3
// theme.scss generates --mat-sys-* tokens which
// automatically cascade to these legacy aliases.
//
// For custom themes, override --mat-sys-* tokens
// rather than these legacy variables.
// ============================================