:root{--bg:#0b0b0f;--card:#16161d;--muted:#8a8a99;--accent:#e50914;--text:#f5f5f7}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:inherit;text-decoration:none}.header{display:flex;align-items:center;justify-content:space-between;padding:16px 32px;position:-webkit-sticky;position:sticky;top:0;background:rgba(11,11,15,.85);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:10}.logo{color:var(--accent);font-weight:800;font-size:22px;letter-spacing:.5px}.container{padding:24px 32px 64px}.row-title{font-size:20px;font-weight:700;margin:28px 0 12px}.carousel{display:flex;gap:14px;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory}.card{position:relative;min-width:220px;width:220px;height:130px;border-radius:10px;overflow:hidden;background:var(--card);scroll-snap-align:start;cursor:pointer;transition:transform .15s ease}.card:hover{transform:scale(1.04)}.card img{width:100%;height:100%;object-fit:cover}.card .fallback{display:flex;align-items:center;justify-content:center;height:100%;padding:12px;text-align:center;font-weight:600;color:var(--muted)}.card .title{position:absolute;left:0;right:0;bottom:0;padding:10px 12px;background:linear-gradient(transparent,rgba(0,0,0,.85));font-size:14px;font-weight:600}.lock-overlay{position:absolute;inset:0;background:rgba(0,0,0,.55);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.lock-overlay .lock{font-size:24px}.btn{background:var(--accent);color:#fff;border:none;padding:8px 14px;border-radius:6px;font-weight:600;cursor:pointer;font-size:13px}.btn.secondary{background:#2a2a34}.player-wrap{max-width:960px;margin:0 auto}video{width:100%;border-radius:10px;background:#000}.lesson-list{list-style:none;padding:0;margin:16px 0}.lesson-list li{padding:12px 14px;border-radius:8px;background:var(--card);margin-bottom:8px;cursor:pointer;display:flex;justify-content:space-between}.lesson-list li.active{outline:2px solid var(--accent)}.muted{color:var(--muted)}.login-box{max-width:360px;margin:80px auto;background:var(--card);padding:28px;border-radius:12px;display:flex;flex-direction:column;gap:12px}input{padding:10px 12px;border-radius:6px;border:1px solid #2a2a34;background:#0f0f14;color:var(--text)}