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p{color:var(--raf-muted);margin-top:12px;font-size:.84rem;line-height:1.76}.courseCompare a{color:var(--raf-blue-deep);align-items:center;gap:7px;margin-top:22px;font-size:.79rem;font-weight:850;display:inline-flex}.articleChecklist{gap:12px;margin-top:31px;padding:0;list-style:none;display:grid}.articleChecklist li{border:1px solid var(--raf-line);color:#46575d;border-radius:14px;align-items:flex-start;gap:11px;padding:17px 18px;font-size:.87rem;line-height:1.6;display:flex}.articleChecklist svg{color:var(--raf-blue);flex:none;margin-top:2px}.promoBlock{background:var(--raf-dark);border-radius:27px;grid-template-columns:auto 1fr;gap:26px;padding:38px;display:grid;box-shadow:0 22px 60px #1f202024}.promoIcon{background:var(--raf-blue);color:#fff;border-radius:18px;place-items:center;width:60px;height:60px;display:grid}.promoEyebrow{color:#79d5f0;letter-spacing:.1em;text-transform:uppercase;font-size:.68rem;font-weight:900}.promoBlock 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21px;font-size:.86rem;line-height:1.75}.articleSidebar{position:relative}.sidebarSticky{position:sticky;top:120px}.sidebarLabel{color:var(--raf-blue-deep);letter-spacing:.1em;text-transform:uppercase;font-size:.68rem;font-weight:900}.sidebarSticky nav{border-left:1px solid var(--raf-line);gap:0;margin-top:17px;display:grid}.sidebarSticky nav a,.sidebarSticky nav span{color:var(--raf-muted);padding:8px 0 8px 17px;font-size:.75rem;line-height:1.45}.sidebarSticky nav a:hover{color:var(--raf-blue-deep)}.authorMini{border-top:1px solid var(--raf-line);grid-template-columns:46px 1fr;gap:12px;margin-top:32px;padding-top:27px;display:grid}.authorInitials{background:var(--raf-blue);color:#fff;border-radius:14px;place-items:center;width:46px;height:46px;font-size:.76rem;font-weight:900;display:grid}.authorMini strong{color:var(--raf-ink);font-size:.8rem;display:block}.authorMini span{color:var(--raf-muted);margin-top:4px;font-size:.68rem;line-height:1.5;display:block}.authorMini a{color:var(--raf-blue-deep);margin-top:8px;font-size:.69rem;font-weight:800;display:inline-block}@media (max-width:1050px){.difficultyHeroGrid{grid-template-columns:minmax(0,1fr) minmax(330px,.72fr);gap:50px}.difficultyArticleGrid{grid-template-columns:minmax(0,1fr) 245px;gap:50px}.challengeGrid{grid-template-columns:1fr}.challengeCard{min-height:auto}.challengeIcon{margin-bottom:25px}}@media (max-width:850px){.difficultyHero{padding-top:26px}.difficultyHeroGrid{grid-template-columns:1fr}.answerCard{width:min(100%,620px)}.difficultyArticleGrid{grid-template-columns:1fr}.articleSidebar{display:none}}@media (max-width:640px){.difficultyHero{padding-bottom:70px}.difficultyBreadcrumbs{margin-bottom:42px}.difficultyHero h1{font-size:clamp(3rem,16vw,4.55rem)}.difficultyLead{font-size:1rem}.answerCard{border-radius:22px;padding:28px}.answerScale{grid-template-columns:1fr}.difficultyIntroSection{padding-top:78px}.articleBlock+.articleBlock{margin-top:72px}.learningSteps,.courseCompare{grid-template-columns:1fr}.promoBlock{grid-template-columns:1fr;padding:28px}.promoActions{flex-direction:column}.promoActions .button{width:100%}}