/* Diagram teaching is scoped to the homepage and the first practical lesson. */
.diagram-home,.diagram-lesson{--diagram-paper:#f5f6f2;--diagram-ink:#161c1a;--diagram-muted:#58635d;--diagram-line:#bbc4b9;--diagram-accent:#d7fa64}
.diagram-home .beginner-hero{display:block;padding-top:40px}
.diagram-home .hero-copy{display:grid;grid-template-columns:1fr 1fr;gap:12px 56px;margin-bottom:32px;align-items:start}
.diagram-home .hero-copy>.eyebrow{grid-column:1/-1;margin-bottom:4px;color:var(--diagram-muted)}
.diagram-home .hero-copy h1{font-size:46px;line-height:1.25;margin:0;max-width:560px}
.diagram-home .hero-introduction{padding-top:2px}
.diagram-home .hero-introduction .lede{margin-bottom:12px;font-size:16px;line-height:1.85}
.diagram-home .hero-introduction .beginner-intro{font-size:14px;margin-bottom:8px}
.diagram-home .hero-introduction>.button,.diagram-home .closing>.button{background:none;color:var(--diagram-ink);border-radius:0;padding:8px 0;min-height:44px;text-decoration:underline;text-underline-offset:5px}
.diagram-home .search-mechanism{padding-top:24px;padding-bottom:32px}
.diagram-home .search-mechanism>h2{font-size:23px;margin-bottom:16px}
.diagram-home .search-mechanism .beginner-disclosure{margin:0}
.diagram-home .search-mechanism .beginner-flow{margin-top:24px}
.diagram-home .beginner-section>.eyebrow{color:var(--diagram-muted)}
.diagram-lesson .article-layout{display:block}
.diagram-lesson .desktop-toc{display:none}
.diagram-lesson .mobile-toc{display:block;max-width:750px;margin-bottom:28px;border-block:1px solid var(--diagram-line);padding:14px 0}
.diagram-lesson .mobile-toc summary{cursor:pointer;min-height:28px}
.diagram-lesson .mobile-toc ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:12px 24px}
.diagram-lesson .prose>p,.diagram-lesson .beginner-step>p,.diagram-lesson .lesson-paths{max-width:760px}
.diagram-lesson .lesson-paths{display:grid;grid-template-columns:1fr 1fr;gap:0 30px;max-width:100%}
.diagram-lesson .lesson-paths h3:nth-of-type(2){grid-column:2;grid-row:1;margin-top:0}
.diagram-lesson .lesson-paths p:nth-of-type(2){grid-column:2;grid-row:2}
.diagram-lesson .lesson-paths .lesson-save{grid-column:1/-1}
.teaching-diagram{color:var(--diagram-ink);background:var(--diagram-paper);border:1px solid var(--diagram-line);border-radius:12px;margin:24px 0 32px;overflow:clip;min-width:0}
.teaching-diagram>figcaption{display:flex;justify-content:space-between;gap:12px;padding:16px 24px 0;font-size:13px;line-height:1.7;color:var(--diagram-muted)}
.diagram-kind{color:var(--diagram-ink);font-weight:600;white-space:nowrap}
.diagram-visual{position:relative;min-width:0}
.diagram-visual>svg{width:100%;height:auto;display:block}
.diagram-mobile{display:none}
.diagram-hotspots{position:absolute;inset:0;pointer-events:none;visibility:hidden}
.has-hotspots .diagram-hotspots{visibility:visible}
.diagram-hotspot{position:absolute;display:block;min-width:44px;min-height:44px;pointer-events:auto;border:1px solid transparent;border-radius:8px;background:transparent;padding:0;cursor:pointer;color:var(--diagram-ink);touch-action:manipulation}
.diagram-hotspot:hover{border-color:var(--diagram-line);background:#161c1a05}
.diagram-hotspot[aria-expanded=true]{border-color:var(--diagram-ink)}
.diagram-hotspot:focus-visible{outline:3px solid var(--diagram-ink);outline-offset:3px;background:#d7fa641f}
.node-affordance{position:absolute;right:3px;top:3px;display:grid;place-items:center;width:22px;height:22px;font:18px/1 var(--sans);border:1px solid var(--diagram-line);border-radius:50%;background:var(--diagram-paper)}
.diagram-hotspot[aria-expanded=true] .node-affordance{background:var(--diagram-accent);border-color:var(--diagram-ink)}
.teaching-diagram .diagram-context{font-size:14px;line-height:1.8;color:var(--diagram-muted);margin:0;padding:0 28px 18px}
.diagram-examples{background:#fff;border-top:1px solid var(--diagram-line);padding:8px 28px}
.teaching-diagram .diagram-node{margin:0;padding:0;border:0}
.diagram-node>summary{cursor:pointer;min-height:44px;padding:12px 0;line-height:1.7;font-size:16px;font-weight:600;border-bottom:1px solid var(--diagram-line)}
.diagram-text-number{font:12px var(--mono);color:var(--diagram-muted);margin-right:12px}
.diagram-node>summary:focus-visible{outline:2px solid var(--diagram-ink);outline-offset:3px}
.is-enhanced .diagram-node>summary{display:none}
.diagram-example{padding:18px 0 20px}
.teaching-diagram .diagram-example h3{font-size:20px;line-height:1.5;margin:0 0 14px;font-weight:630}
.diagram-example h3>span{font:13px var(--mono);display:inline-block;padding:5px 7px;margin-right:6px;background:var(--diagram-accent)}
.teaching-diagram .diagram-example p,.teaching-diagram .diagram-example li{font-size:16px;line-height:1.85;max-width:850px;margin:0 0 14px}
.teaching-diagram .diagram-example p:last-child{margin-bottom:0}
.teaching-diagram .diagram-record{border-left:3px solid var(--diagram-accent);padding:10px 16px;background:var(--diagram-paper);color:var(--diagram-ink)}
.teaching-diagram .diagram-lesson-link{display:inline-flex;align-items:center;gap:12px;min-height:44px;font-size:15px;color:var(--diagram-ink);text-underline-offset:5px}
.teaching-diagram .diagram-example ul{padding-left:24px;margin:12px 0}
.teaching-diagram .diagram-example li{margin:4px 0}
.diagram-evidence{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:18px 0}
.diagram-evidence>div{border-top:2px solid var(--diagram-line);padding-top:12px}
.diagram-evidence dt{font-size:12px;color:var(--diagram-muted);margin-bottom:7px;font-weight:600}
.diagram-evidence dd{font-size:16px;line-height:1.7;margin:0}
.diagram-lesson .worked-record{background:var(--diagram-paper);border:1px solid var(--diagram-line)}
.lesson-record-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:0}
.lesson-record-grid>div{border-top:1px solid var(--diagram-line);padding-top:16px}
.lesson-record-grid dt{font-size:13px;color:var(--diagram-muted);margin-bottom:8px}
.lesson-record-grid dt>span{font:12px var(--mono);background:var(--diagram-accent);color:var(--diagram-ink);padding:3px 6px;margin-right:7px}
.lesson-record-grid dd{font-size:18px;line-height:1.8;margin:0}
.diagram-home .entry-link{border-color:var(--diagram-line)}
@media(max-width:900px){.diagram-home .hero-copy{gap:12px 28px}.diagram-home .hero-copy h1{font-size:38px}}
@media(max-width:760px){
 .diagram-desktop{display:none}.diagram-mobile{display:block;max-width:475px;margin-inline:auto}
 .teaching-diagram>figcaption{padding:14px 18px 0;font-size:12px}
 .diagram-hotspot{border-radius:6px}
 .node-affordance{width:20px;height:20px;font-size:16px;right:0;top:0}
 .diagram-examples{padding:6px 18px}
 .teaching-diagram .diagram-context{padding:0 18px 16px;font-size:13px}
 .teaching-diagram .diagram-example h3{font-size:19px}
 .teaching-diagram .diagram-example p,.teaching-diagram .diagram-example li{font-size:15px}
 .diagram-evidence{grid-template-columns:1fr;gap:14px}
 .diagram-lesson .lesson-paths{display:block}
 .lesson-record-grid{grid-template-columns:1fr;gap:18px}
 .lesson-record-grid dd{font-size:17px}
}
@media(max-width:640px){
 .diagram-home .beginner-hero{padding-top:26px}
 .diagram-home .hero-copy{display:block;margin-bottom:22px}
 .diagram-home .hero-copy>.eyebrow{margin-bottom:16px}
 .diagram-home .hero-copy h1{font-size:35px;line-height:1.25;margin-bottom:20px}
 .diagram-home .hero-introduction .lede{font-size:15px}
 .diagram-home .hero-introduction>.button{font-size:14px}
 .diagram-home .hero-introduction .beginner-intro{display:none}
 .teaching-diagram{border-radius:9px;margin:20px 0 24px}
 .teaching-diagram>figcaption{display:block}
 .diagram-kind{display:block;margin-bottom:4px}
 .diagram-lesson .mobile-toc ul{display:block}
 .diagram-lesson .lesson-paths h3:nth-of-type(2){margin-top:25px}
 .diagram-home .search-mechanism>h2{font-size:22px}
}
@media(prefers-reduced-motion:reduce){.diagram-home,.diagram-lesson{scroll-behavior:auto}.teaching-diagram *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}