:root{--navy:#101a33;--deep:#0a1226;--ink:#172033;--muted:#687286;--paper:#f7f5ef;--white:#fff;--orange:#f1783d;--teal:#57c8b6;--yellow:#f2d76b;--line:#dfe2e7;--radius:24px;--shadow:0 24px 60px rgba(10,19,41,.14)}
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@media(max-width:960px){.section{padding:82px 0}.hero{min-height:auto;padding:150px 0 90px}.hero-grid{grid-template-columns:1fr;padding-top:0}.books{display:none}.subject-grid,.about-grid,.pricing-grid{grid-template-columns:1fr}.about-grid,.pricing-grid{gap:60px}.tool-grid{grid-template-columns:1fr 1fr}.tool-grid>a:nth-child(2){border-right:0}.didactics-card{gap:40px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}}
@media(max-width:720px){.shell{width:calc(100% - 30px)}.section{padding:68px 0}.nav{height:76px}.brand img{width:94px}.menu{display:block;width:44px;height:44px;padding:10px;background:transparent;border:1px solid #ffffff40;border-radius:50%}.menu i{display:block;height:2px;margin:4px;background:white}.nav nav{position:absolute;top:68px;right:15px;left:15px;display:none;gap:0;padding:12px;background:white;box-shadow:var(--shadow);border-radius:16px}.nav nav.open{display:flex;flex-direction:column}.nav nav a{padding:11px;color:var(--ink)}.nav .contact{color:white;background:var(--navy);text-align:center}.hero{padding:124px 0 70px}h1{font-size:clamp(2.8rem,14vw,4rem)}.lead{font-size:1rem}.actions{flex-direction:column}.proof{display:grid;gap:9px;margin-top:34px}.heading{display:block}.heading>p{width:auto;margin-top:18px}.subject{min-height:570px;padding:30px}.levels{right:30px;bottom:28px;left:30px;grid-template-columns:1fr}.two-levels{grid-template-columns:1fr}.tool-grid{grid-template-columns:1fr}.tool-grid>a{min-height:285px;border-right:0;border-bottom:1px solid #ffffff20}.symbol{margin:30px 0 22px}.tool-grid p{min-height:0}.about-grid{gap:50px}.didactics-card{grid-template-columns:1fr;padding:36px 28px}.didactics h2{font-size:2.3rem}.price-links a{flex-direction:column;padding:22px 5px}.footer-grid{grid-template-columns:1fr 1fr;gap:35px 20px}.footer-brand{grid-column:1/-1}.copyright{align-items:start;flex-direction:column;gap:4px}}
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