.lesson-page{min-height:100vh;padding:40px 20px 80px;background:#030b14;color:#ffffff}.lesson-container{width:100%;max-width:950px;margin:0 auto}.lesson-back-link{display:inline-block;margin-bottom:42px;color:#00d98b;font-size:14px;font-weight:600;text-decoration:none;transition:opacity .2s ease}.lesson-back-link:hover{opacity:.75}.lesson-hero{padding:42px;border:1px solid rgba(255,255,255,.09);border-radius:24px;background:radial-gradient(circle at top right,rgba(0,217,139,.12),transparent 38%),linear-gradient(145deg,#0b1825,#07111c);box-shadow:0 20px 60px rgba(0,0,0,.2)}.lesson-eyebrow{display:inline-block;margin-bottom:18px;color:#00d98b;font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.lesson-hero h1{max-width:760px;margin:0;color:#ffffff;font-size:clamp(32px,5vw,58px);font-weight:800;line-height:1.08;letter-spacing:-.04em}.lesson-description{max-width:720px;margin:24px 0 0;color:#aebdca;font-size:17px;line-height:1.8}.lesson-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.lesson-meta span{padding:9px 14px;border:1px solid rgba(0,217,139,.2);border-radius:999px;background:rgba(0,217,139,.08);color:#b9fbe2;font-size:12px;font-weight:700}.lesson-content{margin-top:34px;padding:42px;border:1px solid rgba(255,255,255,.08);border-radius:24px;background:#07121e}.lesson-section{display:grid;grid-template-columns:62px 1fr;gap:22px;padding:30px 0;border-bottom:1px solid rgba(255,255,255,.08)}.lesson-section:first-child{padding-top:0}.lesson-section:last-child{padding-bottom:0;border-bottom:none}.section-number{display:flex;align-items:flex-start;justify-content:center;color:#00d98b;font-size:14px;font-weight:800;letter-spacing:.08em}.lesson-section h2{margin:0 0 14px;color:#ffffff;font-size:24px;font-weight:750;line-height:1.25}.lesson-section p{margin:0;color:#b4c1cd;font-size:16px;line-height:1.9}.lesson-section ul{display:grid;gap:12px;margin:20px 0 0;padding:0;list-style:none}.lesson-section li{position:relative;padding-left:24px;color:#c7d3dd;font-size:15px;line-height:1.7}.lesson-section li:before{position:absolute;top:.65em;left:0;width:7px;height:7px;border-radius:50%;background:#00d98b;content:""}.lesson-footer{display:flex;justify-content:space-between;gap:16px;margin-top:34px}.lesson-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:12px;font-size:14px;font-weight:750;text-decoration:none;transition:transform .2s ease,opacity .2s ease,background .2s ease}.lesson-button:hover{transform:translateY(-2px);opacity:.9}.lesson-button.primary{background:#00d98b;color:#03120d}.lesson-button.secondary{border:1px solid rgba(255,255,255,.14);background:#0c1b29;color:#ffffff}@media (max-width:700px){.lesson-page{padding:26px 14px 55px}.lesson-back-link{margin-bottom:28px}.lesson-content,.lesson-hero{padding:26px 22px;border-radius:18px}.lesson-hero h1{font-size:34px}.lesson-description{font-size:15px}.lesson-section{grid-template-columns:1fr;gap:10px;padding:24px 0}.section-number{justify-content:flex-start}.lesson-section h2{font-size:21px}.lesson-section p{font-size:15px}.lesson-footer{flex-direction:column}.lesson-button{width:100%}}