/* ============================================================================
   concept-c4.css — LAYER 3: PER-CONCEPT TOKENS — Concept 4 (Economics-led)
   ----------------------------------------------------------------------------
   Scoped under `body.round-r1.concept-c4`. Identical baseline values to the other
   concepts at the start of the round (shared S3b Part A system). Owned layer:
   a tune here cannot reach C1/C2/C3/C5 — sibling body-class scopes have no
   cascade path between them.

   Type/spatial values are STRUCTURAL PLACEHOLDERS, not brand tokens
   (type-scale-placeholder).
   ============================================================================ */

body.round-r1.concept-c4 {
  /* type scale (A1) — px (Bricks root font-size is 62.5%; px guarantees gate sizes) */
  --hd-display: 64px;       --hd-display-lh: 1.1;
  --hd-h1:      48px;       --hd-h1-lh: 1.15;
  --hd-h2:      36px;       --hd-h2-lh: 1.2;
  --hd-h3:      24px;       --hd-h3-lh: 1.3;
  --hd-lead:    20px;       --hd-lead-lh: 1.6;
  --hd-body:    18px;       --hd-body-lh: 1.6;
  --hd-small:   14px;

  /* band rhythm (A2) */
  --hd-hero-pad:    120px;
  --hd-section-pad: 96px;
  --hd-cog-pad:     128px;

  /* the three designed measures (A3) */
  --hd-measure-narrow:   640px;
  --hd-measure-standard: 760px;
  --hd-measure-wide:     1150px;
}