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var(--line);margin-bottom:8px}.cn-main{min-width:0;max-width:1050px;width:100%}.cn-hero{background:linear-gradient(125deg,#0d2034,#113955);border-radius:24px;color:white;padding:clamp(30px,6vw,70px);position:relative;overflow:hidden}.cn-hero:after{content:"";position:absolute;right:-90px;top:-130px;width:320px;height:320px;border:1px solid #ffffff30;border-radius:50%;box-shadow:0 0 0 55px #ffffff08,0 0 0 115px #ffffff06;pointer-events:none}.cn-eyebrow{display:block;color:#e9b646;font-size:.8rem;font-weight:800;letter-spacing:.11em}.cn-hero h1,.cn-lesson h1{font-family:Georgia,serif;line-height:1.08;margin:16px 0}.cn-hero h1{font-size:clamp(2.3rem,5vw,4.3rem);max-width:770px}.cn-hero p{max-width:640px;font-size:1.1rem;line-height:1.7;color:#e4ebf3}.cn-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.cn-primary,.cn-secondary{display:inline-block;padding:13px 19px;border-radius:10px;text-decoration:none;font:700 1rem 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h2,.cn-example h2,.cn-trap h2{font-size:1.45rem;margin:0 0 15px}.cn-section p,.cn-example p,.cn-trap p{line-height:1.8;font-size:1.04rem;color:#344963}.cn-example,.cn-trap{padding:23px 27px;margin:28px 0;border-radius:13px;background:#eaf6f6;border-left:5px solid var(--teal)}.cn-trap{background:#fff6e5;border-left-color:#e9b646}.cn-example p,.cn-trap p{margin-bottom:0}.cn-check{padding:26px;border:1px solid var(--line);border-radius:14px;background:#f7fbfd}.cn-question{font-weight:750;color:var(--ink)!important}.cn-choices{display:grid;gap:10px;margin:18px 0}.cn-choice{display:flex;gap:13px;align-items:center;border:1px solid var(--line);border-radius:10px;background:#fff;padding:14px;cursor:pointer}.cn-choice:has(input:checked){border-color:var(--teal);background:#eaf8f7}.cn-choice input{accent-color:var(--teal);width:18px;height:18px;flex-shrink:0}.cn-check-button{font-size:.92rem}.cn-feedback{min-height:1.5em;font-weight:700}.cn-feedback.correct{color:#08734c}.cn-feedback.incorrect{color:#a43e27}.cn-pager{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:23px}.cn-pager a{color:var(--teal);font-weight:750;text-decoration:none}.cn-calculator{padding:24px;border-radius:14px;background:#eef7fb}.cn-calculator form{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px;align-items:end}.cn-calculator label{font-weight:700}.cn-calculator input{width:100%;padding:12px;border:1px solid #a7bed1;border-radius:8px;font:inherit}.cn-calculator button{grid-column:1/-1;justify-self:start;margin-top:8px}.cn-result{display:block;margin-top:15px;line-height:1.8;font-weight:700;overflow-wrap:anywhere}.cn-footer{max-width:1500px;margin:auto;padding:26px 48px 42px;display:flex;justify-content:space-between;color:var(--muted);font-size:.9rem}.cn-footer a{color:var(--teal)}.cn-page :focus-visible{outline:3px solid #cb922b;outline-offset:3px}@media(max-width:850px){.cn-layout{display:block}.cn-nav{position:static;display:flex;gap:5px;overflow:auto;white-space:nowrap;margin-bottom:20px;max-height:none}.cn-nav a{flex-shrink:0}.cn-nav-home{border:0;margin:0}.cn-strip{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.cn-cards{grid-template-columns:1fr}.cn-calculator form{grid-template-columns:1fr}.cn-hero{padding:30px}.cn-footer{padding:25px;display:block}.cn-pager{flex-wrap:wrap}.cn-page .top-nav{display:none}}