:root{color-scheme:light;--ink:#182e39;--muted:#6d8089;--line:#dce5e8;--accent:#147e82;--soft:#e7f5f3;--back:#f2f5f5;--orange:#b56e39;font-family:Inter,'Noto Sans CJK SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;font-size:14px}*{box-sizing:border-box}body{margin:0;background:var(--back);color:var(--ink)}button,input,select{font:inherit}button{cursor:pointer;border:0;border-radius:7px;background:none;color:inherit}button:disabled{opacity:.5;cursor:wait}button:hover{background:var(--soft)}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:3px}a{color:var(--accent)}h1,h2,h3,p{margin-top:0}h2{font-size:17px;line-height:1.5;font-weight:650;margin-bottom:0}h3{font-size:14px;margin-bottom:8px}p{line-height:1.85}.muted{color:#91a1a8}.topbar{height:78px;border-bottom:1px solid var(--line);padding:0 3.5%;display:flex;align-items:center;justify-content:space-between;background:#fff}.brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:650;text-decoration:none;color:var(--ink)}.brand-mark{height:39px;width:39px;display:grid;place-items:center;background:var(--ink);border-radius:10px;color:white;font:italic 32px serif}.brand small{display:block;font-size:8px;letter-spacing:2.5px;margin-top:4px;color:var(--muted)}nav{display:flex;gap:30px;font-size:13px}.nav-active{color:var(--accent);font-weight:650}.quiet{font-size:12px;padding:8px 10px;color:var(--muted);border:1px solid var(--line);background:#fff}.intro{max-width:1760px;padding:35px 3.5% 28px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:20px}.eyebrow{font-size:11px;color:var(--accent);letter-spacing:2px}h1{font-size:29px;letter-spacing:-.7px;margin:9px 0 10px;font-weight:600}.intro p{color:var(--muted);font-size:12px;margin-bottom:0}.status{font-size:11px;white-space:nowrap;padding:9px 12px;border:1px solid var(--line);border-radius:20px;background:#fff}.status.ready:before{content:'●';color:var(--accent);margin-right:7px}.workspace{max-width:1760px;margin:auto;padding:0 3.5% 30px;display:grid;grid-template-columns:230px minmax(400px,1fr) 278px;gap:18px;align-items:start}.panel{border:1px solid var(--line);border-radius:12px;background:white;overflow:hidden}.query-panel{padding:23px 19px;position:sticky;top:15px}.section-label{font-size:10px;letter-spacing:1.4px;color:var(--muted);margin-bottom:13px}.theory-tabs{display:flex;background:var(--back);padding:4px;border-radius:8px;margin-bottom:20px;gap:4px}.theory-tabs button{flex:1;font-size:12px;padding:9px 3px;color:var(--muted)}.theory-tabs button.active{background:white;color:var(--accent);box-shadow:0 1px 4px #102b3510;font-weight:600}label{display:block;font-size:11px;color:var(--muted);margin:15px 0 7px}select,input[type=number],input[type=search]{width:100%;padding:10px 9px;color:var(--ink);background:#fafcfc;border:1px solid var(--line);border-radius:6px;font-size:12px}input[type=checkbox]{accent-color:var(--accent)}.two-fields{display:grid;grid-template-columns:64px 1fr;gap:10px}.check{display:flex;align-items:center;gap:7px;line-height:1.6;margin:16px 0}.check input{margin:0}.primary{display:flex;justify-content:space-between;background:var(--accent);color:white;padding:12px 14px;width:100%;margin-top:19px;font-size:13px}.primary:hover{background:#106a6e}.scope-note{font-size:10px;line-height:1.9;color:#8a989f;margin:12px 0 0}.small{font-size:11px;color:var(--muted);line-height:1.85}.divider{height:1px;background:var(--line);margin:23px 0}.custom-toggle{margin-top:8px;width:100%;border-style:dashed}.leg-row{display:grid;grid-template-columns:1fr 66px 20px;gap:4px;margin:6px 0}.leg-row select{padding:7px 2px;font-size:10px}.central{display:grid;gap:18px;min-width:0}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:21px 23px 15px}.panel-heading .section-label{margin-bottom:6px}.badge{border-radius:20px;background:var(--back);padding:6px 10px;font-size:10px;white-space:nowrap}.badge.complete{color:var(--accent);background:var(--soft)}.badge.partial{background:#fff3e5;color:var(--orange)}.report{font-size:10px;color:var(--muted);padding:0 23px;line-height:1.8}.result-tools{display:flex;gap:8px;padding:15px 23px 11px;align-items:center}.filter-pills{display:flex;gap:3px;flex-wrap:wrap;flex:1}.filter-pills button{font-size:10px;color:var(--muted);padding:6px 9px;white-space:nowrap}.filter-pills button.active{color:var(--accent);background:var(--soft)}.result-tools input{max-width:143px;font-size:10px;padding:7px}.diagram-list{padding:2px 23px 17px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;max-height:330px;overflow:auto}.diagram-card{border:1px solid var(--line);border-radius:8px;padding:5px 8px 9px;text-align:left;min-width:0;background:#fcfdfd}.diagram-card.active{border-color:var(--accent);background:#f0f9f7;box-shadow:inset 0 0 0 .5px var(--accent)}.diagram-card svg{display:block;width:100%;height:70px}.card-label{display:flex;justify-content:space-between;gap:5px;font-size:10px;margin-top:4px}.card-type{font-size:8px;color:var(--muted);display:block;margin-top:5px}.pagination{display:flex;justify-content:center;gap:12px;font-size:10px;color:var(--muted);padding:0 20px 13px;align-items:center}.pagination:empty{display:none}.pagination button{padding:5px 10px}.empty{grid-column:1/-1;text-align:center;padding:28px 5px;color:var(--muted);font-size:12px;line-height:1.9}.graph-actions{display:flex;gap:5px;align-items:center;flex-wrap:wrap}.icon-button{border:1px solid var(--line);width:29px;height:29px;font-size:15px;color:var(--muted)}.graph-actions .quiet{font-size:10px;padding:6px 8px}.graph-wrap{position:relative;margin:0 15px;background:radial-gradient(#c8d9dd 1px,transparent 1px) 0 0/18px 18px;border-radius:9px;background-color:#fbfdfd}#graph{width:100%;height:auto;min-height:200px;display:block;touch-action:none}.graph-hint{text-align:center;position:absolute;bottom:10px;left:0;right:0;pointer-events:none;font-size:9px;color:#8fa0a6}.diagram-meta{padding:13px 23px;display:flex;gap:7px;flex-wrap:wrap}.meta-chip{font-size:10px;border:1px solid var(--line);border-radius:5px;padding:5px 8px;color:var(--muted)}.assessment{padding:0 23px 15px;font-size:11px;line-height:1.9;color:var(--muted)}.assessment.zero{color:var(--orange)}.formula-heading{border-top:1px solid var(--line);padding:17px 23px 8px;display:flex;align-items:center;justify-content:space-between;gap:12px}.formula-heading h3{margin-bottom:5px}.formula-heading .small{font-size:10px}.amplitude{padding:22px 23px 26px;overflow-x:auto;min-height:85px;color:var(--ink)}.amplitude .katex{font-size:1.08em}.amplitude [data-factor]{cursor:pointer}.amplitude [data-factor]:hover,.amplitude [data-factor].selected{background:#caeee5;border-radius:4px;outline:2px solid #b8dfd9;outline-offset:3px}.katex-display{margin:.2em 0;text-align:left}.katex-display>.katex{text-align:left}.sum-panel{border-top:1px solid var(--line);padding:14px 23px}.sum-panel .math-block{padding:15px 0}.sum-panel .small{margin-bottom:8px}.inspector{padding:23px 19px;position:sticky;top:15px}.inspector h2{font-size:15px;margin-bottom:15px}.inspector>p{font-size:11px;color:var(--muted);line-height:1.95}.math-block{overflow:auto;padding:5px 0 16px}.math-block .katex{font-size:1em}.factor-list{display:flex;flex-wrap:wrap;gap:5px;padding-bottom:14px}.factor-list button{padding:5px 7px;font-size:10px;border:1px solid var(--line);color:var(--muted)}.factor-list button.active{border-color:var(--accent);color:var(--accent);background:var(--soft)}details{border-top:1px solid var(--line);padding-top:13px;margin-top:8px}summary{font-size:11px;color:var(--muted);cursor:pointer;line-height:1.6;padding-bottom:8px}#routing .route{margin:6px 0;padding:7px 9px;background:var(--back);border-radius:6px;font-size:10px;overflow:auto}#routing .katex{font-size:.95em}.matrix-table{font:10px ui-monospace,monospace;border-collapse:collapse;width:100%;margin:10px 0}.matrix-table td,.matrix-table th{padding:5px;text-align:center;border:1px solid var(--line)}.matrix-title{font-size:10px;color:var(--muted);margin-top:8px}#limitations p{font-size:10px;line-height:1.8}footer{border-top:1px solid var(--line);padding:22px 3.5%;font-size:10px;color:var(--muted);display:flex;justify-content:space-between;gap:15px}dialog{border:1px solid var(--line);border-radius:15px;padding:27px;max-width:min(92vw,780px);width:780px;max-height:85vh;color:var(--ink);box-shadow:0 20px 90px #102b3530}dialog::backdrop{background:#122b3760;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.dialog-heading h2{font-size:20px}#dialog-body .rule{padding:17px 0;border-top:1px solid var(--line)}#dialog-body p{color:var(--muted);font-size:12px}#dialog-body .katex{font-size:1em}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;font-size:12px;padding:13px 20px;border-radius:9px;z-index:10}.edge-hit{stroke:transparent;stroke-width:18;fill:none;cursor:pointer}.edge-line{fill:none;stroke:#325364;stroke-width:2.3;pointer-events:none}.scalar-line{stroke-dasharray:8 6}.photon-line{stroke:#af794e}.edge-selected .edge-line{stroke:var(--accent);stroke-width:3.5}.node{fill:#244854;stroke:white;stroke-width:3;cursor:grab}.ct-node{fill:white;stroke:var(--orange);stroke-width:2.5}.node-selected{fill:var(--accent);stroke:#a0dfd1;stroke-width:6}.ext-dot{fill:#597c8a;stroke:white;stroke-width:3}.graph-label{fill:#365763;font:14px system-ui,sans-serif;pointer-events:none}.momentum-label{fill:#83949a;font:11px system-ui,sans-serif;pointer-events:none}.diagram-card .edge-line{stroke-width:4}.diagram-card .scalar-line{stroke-dasharray:13 9}.pending-results{opacity:.55;pointer-events:none}
@media(min-width:1600px){.workspace{grid-template-columns:245px minmax(400px,1fr) 310px}.diagram-list{grid-template-columns:repeat(5,minmax(0,1fr))}}@media(max-width:1200px){.workspace{grid-template-columns:205px minmax(350px,1fr)}.inspector{grid-column:2;position:static}.topbar{padding:0 25px}.intro{padding-left:25px;padding-right:25px}.workspace{padding-left:25px;padding-right:25px}.graph-actions .quiet{display:none}}@media(max-width:750px){.topbar{height:68px;padding:0 16px}.brand{font-size:15px}.topbar nav{display:none}.intro{padding:25px 17px 20px;align-items:start;flex-direction:column;gap:12px}h1{font-size:24px}.workspace{display:flex;flex-direction:column;padding:0 12px 20px;gap:12px}.query-panel{position:static;width:100%;padding:18px}.query-panel .theory-tabs{margin-bottom:10px}.query-panel .divider{display:none}.central{width:100%;gap:12px}.inspector{position:static;width:100%;padding:20px 16px}.panel-heading{padding:18px 15px 13px}.report{padding:0 15px}.result-tools{padding:12px 15px;flex-wrap:wrap}.result-tools input{max-width:none}.diagram-list{padding:0 15px 15px;grid-template-columns:repeat(3,minmax(0,1fr))}.graph-wrap{margin:0 8px}.diagram-meta,.assessment,.formula-heading,.sum-panel{padding-left:15px;padding-right:15px}.amplitude{padding:20px 15px}.formula-heading{align-items:start}.formula-heading .quiet{white-space:nowrap}.graph-hint{font-size:8px}footer{padding:18px 15px;flex-direction:column}}
#divergences p{font-size:10px;line-height:1.8;margin-bottom:9px}#divergences h3{font-size:11px;margin:12px 0 5px}#divergences .math-block{padding:0 0 5px}.inspector{max-height:calc(100vh - 30px);overflow-y:auto}@media(max-width:1200px){.inspector{max-height:none;overflow-y:visible}}

.topbar-actions{display:flex;align-items:center;gap:8px}
.term-link{color:inherit;text-decoration:underline;text-decoration-style:dotted;text-decoration-color:var(--accent);text-underline-offset:3px;cursor:pointer}
.term-link:hover{color:var(--accent);background:var(--soft)}
a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}
.query-help{font-size:10px;line-height:1.8;color:var(--muted);margin:7px 0 0}
#glossary-dialog{position:fixed;inset:16px 16px 16px auto;margin:0;width:460px;max-width:calc(100vw - 32px);height:calc(100vh - 32px);height:calc(100dvh - 32px);max-height:none;padding:0;border-radius:14px;box-shadow:0 12px 64px #102b3530;z-index:20}
#glossary-dialog[open]{display:flex;flex-direction:column}
#glossary-dialog::backdrop{background:#122b3745;backdrop-filter:blur(2px)}
.glossary-modal-open{overflow:hidden}
.concept-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px 10px;flex-shrink:0}
.concept-navigation{display:flex;gap:6px;align-items:center}
.concept-navigation button:disabled{cursor:default}
.concept-path{padding:0 22px;margin:0 0 10px;font-size:10px;line-height:1.6;color:var(--muted);overflow-wrap:anywhere;flex-shrink:0}
.concept-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 22px 14px;border-bottom:1px solid var(--line);flex-shrink:0}
.concept-heading h2{font-size:21px;line-height:1.4;min-width:0}
.concept-title-english{display:block;font-size:12px;font-weight:400;line-height:1.65;color:var(--muted);margin-top:4px;overflow-wrap:anywhere}
.concept-heading .quiet{white-space:nowrap;font-size:10px}
.concept-context{padding:10px 22px;margin:0;background:var(--soft);font-size:10px;line-height:1.7;flex-shrink:0}
.concept-content{padding:20px 22px;overflow:auto;overscroll-behavior:contain;flex:1;min-height:0;line-height:1.9;font-size:13px;overflow-wrap:anywhere}
.concept-content p{margin-bottom:14px}
.concept-english{display:block;color:var(--muted);font-size:11px;line-height:1.65;margin-bottom:12px}
.concept-lead{font-size:15px;line-height:1.8;color:var(--ink)}
.concept-content label{font-size:12px;margin-top:20px}
#glossary-count{margin-top:10px}
.concept-results{display:grid;gap:10px}
.concept-result{display:block;text-decoration:none;color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:13px 15px;font-size:12px}
.concept-result strong{font-size:14px}
.concept-result .concept-english{margin:4px 0 7px}
.concept-result:hover{border-color:var(--accent);background:var(--soft)}
.concept-article h3{font-size:15px;margin:23px 0 10px}
.concept-article ul,.concept-article ol{padding-left:23px;margin:14px 0}
.concept-article li{padding-left:3px;margin-bottom:9px}
.concept-article figure{margin:20px 0}
.concept-article img,.concept-article svg{display:block;max-width:100%;height:auto}
.concept-article figcaption{color:var(--muted);font-size:11px;line-height:1.7;margin-top:8px}
.concept-article details{margin:20px 0 0}
.concept-article summary{font-size:12px;color:var(--accent)}
.concept-article table{border-collapse:collapse;width:100%}
.concept-article td,.concept-article th{border:1px solid var(--line);padding:8px;text-align:left}
.concept-math{overflow-x:auto;overflow-y:hidden;padding:13px 0 18px;margin:0 0 7px}
.concept-math .katex{font-size:1.03em}
.concept-sources{border-top:1px solid var(--line);margin-top:28px;padding-top:17px}
.concept-sources h3{font-size:12px}.concept-sources p{font-size:11px;line-height:1.7}
.concept-message{margin:0;padding:0 22px;font-size:10px;color:var(--accent);overflow-wrap:anywhere;flex-shrink:0}
.concept-message:not(:empty){padding-top:10px;padding-bottom:14px;border-top:1px solid var(--line)}
@media(max-width:760px){
  #glossary-dialog{inset:8px;margin:0;width:calc(100vw - 16px);max-width:none;height:calc(100vh - 16px);height:calc(100dvh - 16px)}
  .concept-toolbar{padding:15px 17px 10px}.concept-heading{padding:0 18px 14px}.concept-path{padding:0 18px}.concept-content{padding:18px}.concept-context{padding:10px 18px}
  .topbar-actions{gap:5px}.topbar-actions .quiet{padding:7px;font-size:10px}
}
@media(prefers-reduced-motion:no-preference){.concept-result{transition:background .12s,border-color .12s}}

/* Audited calculations and guided lessons share the encyclopedia's typography. */
[hidden]{display:none!important}
.topbar nav{gap:12px}.topbar nav button{padding:9px 6px;font-size:12px;white-space:nowrap}
.diagram-calculation{border-top:1px solid var(--line)}.calculation-steps{padding:0 23px 20px}
.calculation-step{border-bottom:1px solid var(--line);padding:13px 0;margin:0}.calculation-step:last-child{border-bottom:0}.calculation-step summary{font-size:12px;font-weight:600;color:var(--accent);cursor:pointer}.calculation-step p{font-size:12px;line-height:1.9;margin:10px 0 0}.calculation-step .math-block{padding:14px 0 5px}.calculation-step .factor-list{margin-top:12px}
.example-content{padding:0 23px 23px;min-width:0}.example-content p{font-size:12px}.example-content .small{font-size:11px}.example-content form{border-top:1px solid var(--line);margin-top:20px;padding-top:20px}.example-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px 14px;margin-bottom:18px}.example-fields label{margin-top:6px}#example-status{margin:12px 0}.example-table{width:100%;border-collapse:collapse;font-size:11px}.example-table td,.example-table th{border:1px solid var(--line);padding:10px;text-align:left;overflow-wrap:anywhere}.example-table th{font-weight:600}.numeric-results{display:grid;gap:10px;margin:18px 0}.numeric-results div{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:12px;border-radius:8px;background:var(--soft);font-size:12px}.numeric-results strong{font-weight:600;font-variant-numeric:tabular-nums}.calculation-warning{color:#8d541d;background:#fff6e9;padding:10px;border-radius:7px}.example-sources{border-top:1px solid var(--line);padding-top:14px;margin-top:22px;display:grid;gap:8px;font-size:10px}
.lessons-workspace{max-width:1380px;padding:32px 3.5% 40px;margin:auto}.lesson-intro>p{color:var(--muted);font-size:12px}.lesson-shell{display:grid;grid-template-columns:225px minmax(0,1fr);gap:20px}.lesson-sidebar{padding:22px 16px;position:sticky;top:16px;height:fit-content}.lesson-sidebar>[data-lesson]{display:block;width:100%;padding:13px 8px;text-align:left;margin-bottom:6px;font-size:12px}.lesson-sidebar>[data-lesson].active{color:var(--accent);background:var(--soft)}.lesson-completed:after{content:' ✓';color:var(--accent)}.lesson-sidebar>.quiet{display:block;margin:12px 0;font-size:11px}.lesson-main{padding:24px;min-width:0}.lesson-main h2{font-size:22px;margin-bottom:12px}.lesson-main p{font-size:12px}.lesson-main .small{font-size:10px}.lesson-main section{min-width:0}.lesson-toolbar,.operator-palette{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}#lesson-canvas{display:block;width:100%;background:radial-gradient(#bdd8de .8px,transparent 1px);background-size:18px 18px;border:1px solid var(--line);border-radius:10px;touch-action:none}.lesson-port{fill:white;stroke:#147e82;stroke-width:2;cursor:pointer}.lesson-port.used{fill:#bcded9}.lesson-port.selected{fill:#147e82;stroke-width:4}.lesson-vertex{cursor:grab}.lesson-factor-choices{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:24px}.lesson-checkbar{display:flex;align-items:center;gap:12px;margin-top:18px}.lesson-checkbar .primary{width:auto;min-width:155px}.lesson-feedback{font-size:12px;line-height:1.9;padding:16px;margin-top:18px;border-radius:9px;background:var(--back);min-height:62px}.lesson-feedback.success{background:var(--soft);color:#146b67}.collected-diagrams{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.collected-channel{border:1px dashed var(--line);padding:13px 10px;border-radius:8px;font-size:12px}.collected-channel.found{border:1px solid #afd4ce;background:var(--soft)}.collected-channel p{margin:6px 0 0}.compton-diagrams{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}.compton-diagram{border:1px solid var(--line);border-radius:9px;padding:14px}.compton-diagram h3{font-size:12px}.compton-diagram svg{display:block;width:100%}.matrix-chain{display:flex;gap:12px;margin:15px 0;align-items:center}.matrix-chain>.quiet{flex-shrink:0}.matrix-chain .active{background:var(--soft);color:var(--accent)}.operator-chain{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;flex:1;min-width:0}.operator-slot{border:1px dashed #a8c7ca;padding:12px 7px;font-size:10px;min-height:56px}.compton-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px}.ward-demo{padding:15px 0 0}.lesson-main details{margin-top:16px}.lesson-main details p{padding-top:8px}.lesson-main #lesson-load-status{color:var(--muted);font-size:10px}
@media(max-width:760px){.topbar{height:auto;min-height:78px;flex-wrap:wrap;gap:10px;padding:12px}.topbar nav{display:flex!important;order:3;width:100%;justify-content:center;gap:10px}.topbar nav button{font-size:11px}.lessons-workspace{padding:20px 12px}.lesson-shell{grid-template-columns:1fr;gap:12px}.lesson-sidebar{position:static;padding:12px;display:flex;flex-wrap:wrap;gap:6px}.lesson-sidebar>.section-label{width:100%;margin-bottom:2px}.lesson-sidebar>[data-lesson]{width:auto;flex:1;font-size:10px;text-align:center;padding:10px 5px}.lesson-sidebar>.quiet{font-size:10px;margin:4px 0}.lesson-sidebar .divider{display:none}.lesson-main{padding:18px 14px}.lesson-main h2{font-size:19px}.lesson-factor-choices{grid-template-columns:1fr 1fr;gap:10px}.matrix-chain{display:block}.operator-chain{margin-top:8px}.compton-diagram{padding:8px}.compton-diagram h3{font-size:10px}.compton-diagrams{gap:8px}.operator-palette button{font-size:10px}.example-content,.calculation-steps{padding-left:15px;padding-right:15px}.example-fields{grid-template-columns:1fr 1fr}.example-table th,.example-table td{padding:7px;font-size:10px}.collected-diagrams{gap:6px}.collected-channel{padding:9px 6px}.collected-channel .small{font-size:8px}}
.endpoint-controls{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;align-items:end;margin:8px 0 16px}.endpoint-controls label{margin-top:0}.endpoint-controls button{min-height:38px}.lesson-wire-list #lesson-wires{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.lesson-wire-list button{font-size:11px;padding:10px}@media(max-width:760px){.endpoint-controls{grid-template-columns:1fr 1fr}.endpoint-controls button{grid-column:1/-1;min-height:44px}.endpoint-controls select{min-height:44px}.lesson-wire-list button{min-height:44px}}
/* Compact links to reference data; derivations stay available on demand. */
.physical-references{margin:0 24px 18px;padding:12px 14px;background:#f5f9f9;border-radius:8px;font-size:12px;color:var(--muted)}
.physical-references p{line-height:1.8}.physical-references ul{padding-left:18px;margin:8px 0}.physical-references li{margin:7px 0}.physical-references a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.reference-snapshot{display:flex;flex-wrap:wrap;gap:6px 22px}.reference-snapshot p{margin:6px 0}
.lesson-main .physical-references{margin:12px 0 22px}.diagram-calculation>summary,#example-derivation>summary,.numeric-details>summary{padding:14px 0;color:var(--muted);cursor:pointer;font-size:13px}
#example-derivation{margin-bottom:22px;border-bottom:1px solid var(--line)}.numeric-details{margin:18px 0}.numeric-details .example-table{margin-top:12px}