:root {
  /* Couleurs */
  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-border: #e2e8f0;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;

  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;

  --color-success: #15803d;
  --color-success-bg: #f0fdf4;
  --color-success-border: #bbf7d0;

  --color-warning: #b45309;
  --color-warning-bg: #fffbeb;
  --color-warning-border: #fde68a;

  --color-danger: #b91c1c;
  --color-danger-bg: #fef2f2;
  --color-danger-border: #fecaca;

  --color-info: #1d4ed8;
  --color-info-bg: #eff6ff;
  --color-info-border: #bfdbfe;

  /* Typographie */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "Courier New", "SF Mono", "Fira Code", monospace;

  --text-xs: 9pt;
  --text-sm: 10pt;
  --text-base: 11pt;
  --text-md: 12pt;
  --text-lg: 14pt;
  --text-xl: 18pt;
  --text-2xl: 22pt;

  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;

  --leading-tight: 1.25;
  --leading-normal: 1.65;
  --leading-relaxed: 1.8;

  /* Espacements */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Bordures */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-full: 9999px;

  /* Ombres */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07);
  --shadow-md: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.10);

  /* Layout */
  --max-width-content: 820px;
  --max-width-index: 1100px;
}