.concept-meaning-toggle{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:9px 15px;border:1px solid #b8584d;border-radius:9px;background:#fff8ed;color:#953b32;font:600 14px/1.45 Inter,Arial,sans-serif;cursor:pointer;margin:2px 0 20px;transition:background .15s,border-color .15s}
.concept-meaning-toggle:hover,.concept-meaning-toggle[aria-expanded=true]{background:#fce7dd;border-color:#953b32}.concept-meaning-toggle:focus-visible{outline:3px solid #b7473a;outline-offset:3px}.concept-meaning-toggle svg{width:18px;height:18px;flex:none}.concept-meaning-toggle .concept-meaning-chevron{font-size:17px;margin-left:3px;transition:transform .15s}.concept-meaning-toggle[aria-expanded=true] .concept-meaning-chevron{transform:rotate(180deg)}
.concept-meaning-panel[hidden]{display:none!important}.concept-meaning-panel{--cm-ink:#263c3e;--cm-muted:#586760;--cm-line:#d5dacf;--cm-paper:#fffdf5;--cm-soft:#f4f3e9;--cm-accent:#a74438;--cm-aqua:#256c70;margin:0 0 25px;border:1px solid var(--cm-line);border-left:4px solid var(--cm-accent);border-radius:0 13px 13px 0;background:var(--cm-paper);color:var(--cm-ink);overflow:hidden}.concept-meaning-inner{padding:24px 26px}.concept-meaning-heading{display:flex;align-items:center;gap:12px;margin-bottom:15px}.concept-meaning-heading .eyebrow{font-size:10px;letter-spacing:.12em;color:var(--cm-muted)}.concept-meaning-heading h3{font-size:21px;line-height:1.3;letter-spacing:-.025em;margin:4px 0 0;color:var(--cm-ink)}.concept-meaning-mark{display:grid;place-items:center;width:39px;height:39px;border:1px solid var(--cm-line);border-radius:50%;font:24px Georgia,serif;color:var(--cm-accent);flex:none}.concept-meaning-idea,.concept-meaning-example p,.concept-meaning-conditions p{font-size:15px;line-height:1.75;max-width:76ch;margin:0;color:var(--cm-ink)}.concept-meaning-example{padding:18px 20px;background:var(--cm-soft);border-radius:9px;margin:19px 0}.concept-meaning-panel h4{font-size:12px;letter-spacing:.03em;margin:0 0 7px;color:var(--cm-aqua)}.concept-meaning-relationship{border-top:1px solid var(--cm-line);padding-top:15px}.concept-meaning-relationship summary{font-size:13px;font-weight:600;cursor:pointer;min-height:32px;color:var(--cm-ink)}.concept-meaning-relationship summary:focus-visible,.concept-meaning-lab:focus-visible{outline:3px solid var(--cm-accent);outline-offset:3px}.concept-meaning-relationship .formula-expression{margin:12px 0}.concept-meaning-conditions{margin:15px 0 0}.concept-meaning-return{font-size:13px;line-height:1.6;color:var(--cm-muted);margin:18px 0 0}.concept-meaning-lab{display:inline-block;margin-top:13px;color:var(--cm-accent);font-size:13px;font-weight:600;min-height:28px}.concept-meaning-panel .formula-symbols{margin-bottom:10px}
html[data-theme=dark] .concept-meaning-toggle{background:#26323c;color:#ffad9f;border-color:#b67e73}html[data-theme=dark] .concept-meaning-toggle:hover,html[data-theme=dark] .concept-meaning-toggle[aria-expanded=true]{background:#35404a;border-color:#ffad9f}html[data-theme=dark] .concept-meaning-panel{--cm-ink:#f0f4f7;--cm-muted:#c0cbd0;--cm-line:#52616c;--cm-paper:#1b2833;--cm-soft:#263744;--cm-accent:#ffad9f;--cm-aqua:#8ed4d4}
@media(max-width:600px){.concept-meaning-inner{padding:19px 16px}.concept-meaning-example{padding:15px}.concept-meaning-heading h3{font-size:19px}.concept-meaning-idea,.concept-meaning-example p,.concept-meaning-conditions p{font-size:14px}.concept-meaning-toggle{width:100%;margin-bottom:17px}.concept-meaning-panel .formula-symbols{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.concept-meaning-toggle,.concept-meaning-chevron{transition:none!important}}