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p{margin:0;color:#bfb7d1}.progress-track{width:170px;height:7px;overflow:hidden;border-radius:999px;background:#372753}.progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#efbb4d,#8a62ff)}.lesson-shell{padding:62px 0 90px}.lesson-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:34px}.lesson-side{position:sticky;top:100px;height:max-content;color:#bdb5d0;font-size:.9rem}.lesson-side a{display:block;margin-top:12px;color:#f0bd50}.lesson-content{min-height:460px;padding:clamp(25px,5vw,55px);border:1px solid rgba(225,217,255,.15);border-radius:22px;background:#1a0f37}.lesson-content h1{font-size:clamp(2rem,4vw,3.5rem)}.lesson-content h2{margin-top:34px;font-size:1.55rem}.lesson-content p,.lesson-content li{color:#d1c9df;line-height:1.75}.lesson-content pre{overflow:auto;padding:16px;border-radius:12px;background:#0d061e;color:#d9cbff}.lesson-actions{display:flex;justify-content:space-between;gap:14px;margin-top:42px;padding-top:25px;border-top:1px solid rgba(225,217,255,.14)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}html[dir=rtl] body{font-family:DM Sans,Noto Sans Arabic,system-ui,sans-serif}html[dir=rtl] .brand,html[dir=rtl] h1,html[dir=rtl] h2,html[dir=rtl] h3{letter-spacing:0}html[dir=rtl] .eyebrow:before{order:2}html[dir=rtl] .registration-actions .button:last-child{margin-left:0;margin-right:auto}@media(max-width:860px){.nav-shell{gap:16px;min-height:66px}.login-link{display:none}.hero{padding:70px 0 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