/* ch4.css — widgets for chapter 4 (roofline). --lk-* tokens only. */
.rf-plot{margin:.2rem 0 .8rem;border:1px solid var(--lk-rule-soft);background:var(--lk-paper)}
.rf-plot svg{display:block}
body.lk .rf-how{font:.82rem/1.5 var(--lk-mono);color:var(--lk-ink-soft);margin:.7rem 0 0}
.w-controls label[hidden]{display:none}