/* Arkum Labs — Base layer. Element defaults + a few brand utilities.
   Imported last so tokens are available. Scoped lightly to avoid
   fighting consumer resets. */

:root {
  color-scheme: dark;
}

body.ark, .ark-root {
  background: var(--surface-void);
  color: var(--text-default);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Element defaults for opted-in roots (raw h1–h4 / p / a in a page).
   Scoped to .ark-root so consumer resets are never overridden globally. */
.ark-root h1, .ark-root h2, .ark-root h3, .ark-root h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--text-strong);
  margin: 0;
  text-wrap: balance;
}
.ark-root h1 { font-size: var(--text-5xl); letter-spacing: var(--tracking-tighter); }
.ark-root h2 { font-size: var(--text-4xl); letter-spacing: var(--tracking-tighter); }
.ark-root h3 { font-size: var(--text-2xl); }
.ark-root h4 { font-size: var(--text-xl); }
.ark-root p  { margin: 0; text-wrap: pretty; }
.ark-root a  { color: var(--text-accent); text-decoration: none; }
.ark-root ::selection { background: color-mix(in oklab, var(--ark-cyan) 30%, transparent); color: var(--text-strong); }

/* ---- Brand utilities ---- */

/* Hidden engineered grid mesh — apply to dark sections/panels */
.ark-mesh {
  background-image: var(--grid-mesh);
  background-size: var(--grid-mesh-size);
}

/* Obsidian panel: charcoal surface with machined top edge + hairline border */
.ark-obsidian {
  background: var(--surface-panel);
  border: 1px solid var(--border-default);
  box-shadow: var(--edge-top);
}

/* Vertical portal seam — the logo's negative-space slit, as a divider */
.ark-slit {
  width: 1px;
  align-self: stretch;
  background: var(--slit-cyan);
  opacity: 0.7;
}

/* Eyebrow / spaced-caps label */
.ark-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Display heading helper */
.ark-display {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  letter-spacing: var(--tracking-tighter);
  line-height: var(--leading-tight);
  color: var(--text-strong);
}

/* Mono data helper (addresses, hashes, metrics) */
.ark-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

/* Focusable elements get the cyan slit-glow ring */
.ark-focusable:focus-visible {
  outline: none;
  box-shadow: var(--glow-focus);
}