/* ==========================================================================
   Stellaria institutional tokens — authored to the design-system spec.
   Dark canvas, one accent, mono telemetry, hairline panels, tint elevation.
   ========================================================================== */
:root {
  /* --- canvas & surfaces (off-black tinted toward 260°, elevation = tint step) --- */
  --c-bg:        oklch(0.17 0.012 260);
  --c-surface-1: oklch(0.20 0.014 260);
  --c-surface-2: oklch(0.235 0.016 260);
  --c-surface-3: oklch(0.275 0.018 260);
  --c-inset:     oklch(0.145 0.012 260);

  /* --- text (off-white tinted toward 260°, never pure #fff) --- */
  --c-white:     oklch(0.96 0.006 260);
  --c-text:      oklch(0.93 0.008 260);
  --c-text-mut:  oklch(0.72 0.010 260);
  --c-text-dim:  oklch(0.56 0.012 260);

  /* --- borders (hairline) --- */
  --c-line:      oklch(0.34 0.014 260);
  --c-line-soft: oklch(0.28 0.012 260);
  --c-line-strong: oklch(0.44 0.020 260);

  /* --- single accent (institutional blue ≈ #085CEE) --- */
  --c-accent:      oklch(0.52 0.22 260);
  --c-accent-hi:   oklch(0.62 0.20 260);
  --c-accent-dim:  oklch(0.40 0.14 260);
  --c-accent-tint: oklch(0.30 0.08 260);

  /* --- functional signals (used sparingly, never decorative) --- */
  --c-warn:  oklch(0.72 0.15 75);
  --c-good:  oklch(0.70 0.14 150);
  --c-crit:  oklch(0.60 0.20 25);

  /* --- typography --- */
  --font-display: "Host Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --fs-eyebrow: 0.72rem;
  --fs-label:   0.75rem;
  --fs-sm:      0.82rem;
  --fs-body:    0.94rem;
  --fs-lead:    1.12rem;
  --fs-h3:      1.28rem;
  --fs-h2:      1.72rem;
  --fs-h1:      2.4rem;

  --lh-tight: 1.12;
  --lh-body:  1.55;

  --measure-body: 66ch;
  --measure-lead: 54ch;

  /* --- spacing scale (all padding/margin/gap comes from here) --- */
  --sp-0: 0;
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4rem;

  /* --- radii (max 8px; pill is the named exception) --- */
  --r-1: 3px;
  --r-2: 5px;
  --r-3: 8px;
  --r-pill: 999px;

  /* --- the only permitted shadow --- */
  --shadow-focus: 0 0 0 2px var(--c-bg), 0 0 0 4px var(--c-accent-hi);

  /* --- motion --- */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --dur-1: 120ms;
  --dur-2: 220ms;
  --dur-3: 380ms;
}