:root {
  /* Stack Meter — locked 2026-10-15 */
  --color-coral: #f43f5e;
  --color-slate-ink: #0f172a;
  --color-slate-mid: #334155;
  --color-muted: #64748b;
  --color-border: #cbd5e1;
  --color-canvas: #f8fafc;
  --color-panel: #f1f5f9;
  --color-card: #ffffff;
  --color-on-coral: #ffffff;

  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius: 6px;
  --radius-card: 10px;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  --content-max: 640px;
}