/* ===== Design Tokens ===== */
:root {
  /* --- Color Palette --- */
  --color-primary: #d4edff;
  --color-primary-dark: #a3d4f7;
  --color-primary-light: #E8F6FF;
  --color-accent: #F58220;
  --color-accent-hover: #e07415;
  --color-accent-light: #FFF0E0;

  --color-text: #1a1a2e;
  --color-text-muted: #5a5a72;
  --color-text-inverse: #ffffff;

  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fc;
  --color-bg-accent: #E8F6FF;
  --color-border: #e0e6ed;

  --color-success: #2d8a56;
  --color-error: #c0392b;

  /* --- Typography --- */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --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-size-5xl: 3rem;

  --line-height-tight: 1.25;
  --line-height-base: 1.6;
  --line-height-relaxed: 1.75;

  /* --- Spacing (4px base) --- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 3rem;
  --space-16: 5rem;

  /* --- Layout --- */
  --container-max: 1200px;
  --container-narrow: 900px;
  --container-padding: var(--space-4);

  /* --- Borders & Radius --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

  /* --- Transitions --- */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* --- Z-index Scale --- */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
}