/**
 * Design Tokens & Theme Variables
 * WatermarkCleaner Visual Identity
 */
:root {
  /* Color Palette - Refined Cool Slate & Subtle Indigo */
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-muted: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --text-inverse: #ffffff;

  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-border: #bfdbfe;

  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-focus: #3b82f6;

  --success-bg: #f0fdf4;
  --success-text: #166534;
  --success-border: #bbf7d0;

  --warning-bg: #fffbeb;
  --warning-text: #92400e;
  --warning-border: #fde68a;

  --danger-bg: #fef2f2;
  --danger-text: #991b1b;
  --danger-border: #fecaca;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Sizing & Spacing */
  --container-max: 1080px;
  --header-height: 64px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}