:root {
  --color-bg: #f7f8fa;
  --color-bg-subtle: #f1f3f6;
  --color-surface: #ffffff;
  --color-surface-raised: #ffffff;
  --color-text: #17212b;
  --color-text-secondary: #607080;
  --color-text-tertiary: #8995a3;
  --color-border: #e2e7ec;
  --color-border-strong: #cbd4dc;
  --brand-charcoal: #24282b;
  --brand-accent: #d4e21a;
  --brand-accent-hover: #becd14;
  --brand-accent-soft: #f2f6d7;
  --brand-on-accent: #24282b;
  --brand-focus-ring: rgba(212, 226, 26, .38);
  --color-primary: var(--brand-accent);
  --color-primary-hover: var(--brand-accent-hover);
  --color-primary-soft: var(--brand-accent-soft);
  --color-on-primary: var(--brand-on-accent);
  --color-success: #16785a;
  --color-success-soft: #e8f6f0;
  --color-warning: #a86512;
  --color-warning-soft: #fff5e6;
  --color-danger: #ba3a3a;
  --color-danger-soft: #fff0f0;
  --sidebar-width: 16rem;
  --content-max-width: 84rem;
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: Consolas, "Courier New", monospace;
  --text-xs: .75rem;
  --text-sm: .875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.125rem;
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --radius-sm: .375rem;
  --radius-md: .625rem;
  --radius-lg: .875rem;
  --shadow-sm: 0 1px 2px rgba(23, 33, 43, .05);
  --shadow-md: 0 8px 24px rgba(23, 33, 43, .08);
  --transition-fast: 150ms ease;
}