u.concept-term{text-underline-offset:.2em;text-decoration-color:#946b46;text-decoration-thickness:2px}.block-anchor{scroll-margin-top:1rem;display:block}.proof-block.callout{--bg:transparent;margin:1rem 0}.proof-block>summary{cursor:pointer;color:var(--color);padding:1rem 0;font-weight:600}.proof-block>summary:focus-visible{outline:2px solid var(--secondary);outline-offset:3px}.proof-content>:first-child{margin-top:0}.book-figure{margin:1.5rem 0;scroll-margin-top:1rem}.book-figure>svg.book-diagram{width:100%;max-width:36rem;height:auto;color:var(--dark);margin:0 auto;display:block}.book-figure>figcaption{color:var(--darkgray);text-align:center;margin-top:.75rem;font-style:italic;line-height:1.5}