.learning-entry{display:flex;align-items:center;gap:2rem;margin-block:3rem;padding:2rem;border:1px solid #cad8bd;border-radius:20px;background:#eef3e6}.learning-entry>div{flex:1}.learning-entry h2{font-size:clamp(1.6rem,3vw,2.3rem);line-height:1.2;margin:.6rem 0}.learning-entry p{max-width:65ch}.learning-entry>a{flex-shrink:0}.lesson-main{max-width:1040px}.lesson-main>section>p,.lesson-main>section>h2{max-width:78ch}.lesson-breadcrumb{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem;font-size:.9rem}.lesson-main .eyebrow{font-size:.78rem;letter-spacing:.03em}.lesson-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem;margin:2rem 0}.lesson-card{border:1px solid #cad8bd;border-radius:20px;padding:1.5rem;background:#f4f6ed;display:flex;flex-direction:column;align-items:start}.lesson-card h2{margin:.3rem 0 .5rem;font-size:1.4rem}.lesson-card h2 a{text-decoration:none}.lesson-card p{font-size:.98rem;flex:1}.lesson-number{color:#617249;font:700 .85rem monospace}.lesson-read{font-weight:700;padding:.5rem 0;min-height:44px}.lesson-figure{margin:1.5rem 0;background:#edf3e4;border:1px solid #cad8bd;border-radius:18px;padding:2rem;max-width:740px}.lesson-figure figcaption{margin-top:1.2rem;font-size:.85rem;color:#3e584b}.lesson-sequence{display:flex;flex-wrap:wrap;gap:.5rem 1rem;justify-content:center;align-items:center;font-size:clamp(1.6rem,5vw,3rem);font-weight:700}.lesson-sequence>span{font-size:.7em;color:#6b7b58}.lesson-rule{text-align:center;margin-top:1rem;font-size:1.1rem;font-weight:600;overflow-wrap:anywhere}.lesson-matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:280px;margin:auto}.lesson-matrix span,.lesson-heights span{display:grid;place-items:center;aspect-ratio:1;background:white;border:1px solid #b7c7a7;border-radius:10px;font-size:2.4rem;color:#204d40}.lesson-net{display:grid;grid-template-columns:repeat(3,minmax(0,72px));grid-template-rows:repeat(4,64px);justify-content:center;gap:3px}.lesson-net>span{display:grid;place-items:center;background:#fff;border:2px solid #36644d;font-size:1.6rem;font-weight:700}.lesson-net .face-C,.lesson-net .face-F{background:#d9e9ba}.lesson-net .face-A,.lesson-net .face-E{background:#f8e7b4}.lesson-heights{display:grid;grid-template-columns:repeat(3,1fr);max-width:280px;margin:auto;gap:9px}.lesson-heights span{font-size:2rem;aspect-ratio:1.4}.lesson-logic{max-width:300px;margin:auto}.lesson-logic>div{border:2px solid #426749;border-radius:50%;padding:15px 40px 25px;background:#fff;text-align:center;font-weight:bold}.lesson-logic>div>div{margin:5px 0;border:2px solid #426749;border-radius:50%;padding:12px 20px;background:#d9e9ba}.lesson-logic span{font-size:2rem}.lesson-caution,.lesson-exercise{padding:1.5rem;border-radius:16px;border:1px solid #d4cba7;background:#fbf6e7;margin:2rem 0;max-width:78ch}.lesson-caution h2,.lesson-exercise h2{margin:0 0 .5rem;font-size:1.3rem}.lesson-exercise{background:#eef3e6;border-color:#c2d0b2}.lesson-exercise details{border-top:1px solid #bdc9ac;padding-top:1rem;margin-top:1rem}.lesson-exercise summary{cursor:pointer;font-weight:700;min-height:44px;padding:.5rem 0}.lesson-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1rem;margin:2rem 0}.lesson-main a.primary,.learning-entry a.primary,#question-report-mail{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;color:#fff;min-height:48px}.lesson-related{display:flex;flex-direction:column;gap:.5rem}.lesson-formula{max-width:740px;background:#edf3e4;border-radius:14px;padding:1.5rem;text-align:center;font-size:1.6rem;font-weight:bold}.report-question{margin-block:.75rem;display:inline-block;font-size:.9rem;text-decoration:underline;text-underline-offset:.2em}.score-method{display:inline-block;margin:0 0 1rem;text-decoration:underline;color:inherit}.support-dialog textarea{box-sizing:border-box;width:100%;min-height:190px;resize:vertical;border:1px solid #71866e;border-radius:8px;padding:.8rem;font:inherit;background:#fff;color:#183e36}.review-item .report-question{display:block}.legal-header nav{display:flex!important}.header nav{gap:1rem}.lesson-main [hidden]{display:none!important}html.a11y-contrast .lesson-card,html.a11y-contrast .lesson-caution,html.a11y-contrast .lesson-exercise,html.a11y-contrast .learning-entry{background:#101010;border-color:white;color:white}html.a11y-contrast .lesson-figure,html.a11y-contrast .lesson-formula{background:#edf3e4;color:#183e36}html.a11y-contrast .lesson-figure figcaption{color:#183e36}html.a11y-contrast .lesson-main a.primary,html.a11y-contrast .learning-entry a.primary{color:#101010;background:#ffe66b}
@media(max-width:720px){.learning-entry{flex-direction:column;align-items:stretch;margin-block:2rem;padding:1.4rem}.lesson-grid{grid-template-columns:1fr}.lesson-figure{padding:1.2rem .75rem}.lesson-main h1{font-size:2.2rem}.lesson-main{width:calc(100% - 32px)}.lesson-card{padding:1.3rem}.legal-header nav{width:100%;order:3;font-size:.9rem}.lesson-actions{align-items:stretch;flex-direction:column}.lesson-actions a{min-height:44px}.header nav a{min-height:44px;display:inline-flex;align-items:center}}
@media print{.lesson-card,.lesson-figure,.lesson-exercise{break-inside:avoid}.lesson-actions,.report-question{display:none}.lesson-main{max-width:none}}