:root {
  /* Shared spacing scale: 4px half-step, 8px base rhythm. */
  --space-0: 0;
  --space-0-5: 4px;
  --space-1: 8px;
  --space-1-5: 12px;
  --space-2: 16px;
  --space-2-5: 20px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
  --space-9: 72px;
  --space-10: 80px;
  --space-11: 88px;
  --space-12: 96px;
  --space-14: 112px;
  --space-15: 120px;
  --space-16: 128px;
  --space-18: 144px;
  --space-19: 152px;
  --space-20: 160px;
  --space-22: 176px;
  --space-24: 192px;
  --space-25: 200px;
  --space-26: 208px;
  --space-27: 216px;
  --space-28: 224px;
  --space-31: 248px;
  --space-32: 256px;

  /* Four readable text roles plus a restrained display hierarchy. */
  --text-micro: 11px;
  --text-meta: 13px;
  --text-control: 14px;
  --text-body: 16px;
  --text-lead: 20px;
  --text-lead-fluid: clamp(16px, 1.4vw, 20px);
  --text-display-mobile: 40px;
  --text-project-mobile: 30px;
  --text-display-hero: clamp(48px, 5vw, 72px);
  --text-display-section: clamp(40px, 3.4vw, 48px);
  --text-display-project: 36px;
  --text-index-heading-mobile: 32px;
  --text-index-summary: 18px;
  --text-evidence-heading: 18px;
  --leading-index: 1.7;
  --leading-index-heading: 1.4;
  --tracking-index-heading: 0;
  --leading-hero: 1.18;
  --tracking-hero: -0.04em;
  --tap-target: 44px;
  --text-display-about: clamp(48px, 5.8vw, 72px);
  --text-display-court: clamp(48px, 5.8vw, 72px);
  --text-display-project-title: clamp(64px, 9vw, 132px);
  --text-display-chamber: clamp(36px, 4.4vw, 56px);

  /* Article typography stays distinct from the homepage display scale. */
  --text-article-title: 44px;
  --text-article-title-mobile: 32px;
  --text-article-heading: 28px;
  --text-article-heading-mobile: 24px;
  --text-article-body: 17px;
  --leading-article-title: 1.35;
  --leading-article-heading: 1.5;
  --leading-article-body: 1.9;
  --tracking-article-title: -0.025em;
  --tracking-article-heading: -0.01em;

  /* Shared content widths and vertical rhythm. */
  --content-walk-max: 1220px;
  --content-project-max: 1100px;
  --content-reading-max: 720px;
  --content-copy-max: 640px;
  --content-article-max: 720px;
  --project-gap: var(--space-10);
  --project-gap-short: var(--space-10);
  --viewer-backdrop: rgba(16, 23, 25, 0.88);
  --portrait-height-mobile: 460px;
  --artifact-portrait-width: 390px;
  --artifact-gallery-min: 280px;
  --evaluation-question-share: 56%;
  --evaluation-label-width: var(--space-10);

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-brand: 700;

  --radius-surface: 0;
  --radius-status: 50%;
  --stroke-focus: 2px;
  --stroke-border: 1px;
  --ratio-artifact: 16 / 9;

  --motion-direct: 80ms;
  --motion-ui: 180ms;
  --motion-elevate: 280ms;
  --ease-standard: ease;
  --ease-direct: linear;

  --shadow-surface: 16px 24px 0 rgba(48, 57, 54, 0.055);
  --shadow-surface-hover: 20px 28px 0 rgba(48, 57, 54, 0.07);
  --shadow-status: 12px 12px 0 rgba(116, 92, 143, 0.1);
}