:root {
  /* Brand */
  --accent:        #1d4ed8;
  --accent-hover:  #1e40af;
  --accent-light:  #eff6ff;

  /* Origin states — ground truth from content.css */
  --color-human: #22c55e;
  --color-mixed: #f59e0b;
  --color-ai:    #ef4444;

  /* Score text colors — match tooltip colors */
  --color-human-text: #16a34a;
  --color-mixed-text: #d97706;
  --color-ai-text:    #dc2626;

  /* Neutrals */
  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-600: #4b5563;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Surfaces */
  --surface:       #ffffff;
  --surface-muted: var(--gray-50);
  --surface-dark:  #0d0f12;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
               "Helvetica Neue", Arial, sans-serif;
  --text-hero: clamp(2.5rem, 6vw, 4rem);
  --text-5xl:  3rem;
  --text-4xl:  2.25rem;
  --text-3xl:  1.875rem;
  --text-2xl:  1.5rem;
  --text-xl:   1.25rem;
  --text-lg:   1.125rem;
  --text-base: 1rem;
  --text-sm:   0.875rem;
  --text-xs:   0.75rem;

  /* Layout */
  --container-max: 1120px;
  --container-pad: clamp(16px, 5vw, 40px);

  /* Effects */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-pill: 999px;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08);
  --shadow-md:   0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:   0 12px 40px rgba(0,0,0,.14);
  --transition:  150ms cubic-bezier(0.4, 0, 0.2, 1);
}