:root{color-scheme:dark;--bg:#080b14;--panel:#121827;--line:#28334a;--gold:#facc15;--cyan:#22d3ee;--text:#f8fafc;--muted:#a8b3c7}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#0d1628,var(--bg) 420px);color:var(--text);font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.65}a{color:inherit}.wrap{width:min(1120px,calc(100% - 32px));margin:auto}.site-head{border-bottom:1px solid var(--line);background:#0c1220e8;position:sticky;top:0;z-index:5}.head-inner{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:15px 0}.brand{text-decoration:none;font-weight:900;color:var(--gold)}.head-note{color:var(--muted);font-size:.86rem}.hero{text-align:center;padding:72px 0 45px}.eyebrow{color:var(--cyan);font-weight:900;letter-spacing:.14em;font-size:.75rem}.hero h1{font-size:clamp(2.2rem,6vw,4.6rem);line-height:1;margin:14px 0}.hero p{max-width:760px;margin:auto;color:var(--muted);font-size:1.08rem}.controls{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}.controls input,.controls select{background:var(--panel);border:1px solid var(--line);border-radius:10px;color:white;padding:12px 14px;font:inherit}.controls input{flex:1;min-width:240px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;padding-bottom:70px}.card{display:flex;flex-direction:column;background:linear-gradient(145deg,#151d30,#0f1422);border:1px solid var(--line);border-radius:16px;padding:22px;text-decoration:none;transition:.2s}.card:hover{transform:translateY(-3px);border-color:var(--gold)}.badges{display:flex;gap:8px}.badge{font-size:.72rem;font-weight:900;border:1px solid #52617c;border-radius:999px;padding:3px 9px}.level{color:#071018;background:var(--gold);border-color:var(--gold)}.card h2{font-size:1.25rem;line-height:1.25;margin:16px 0 8px}.card p{color:var(--muted);margin:0 0 18px}.open{color:var(--gold);font-weight:800;margin-top:auto}.empty{color:var(--muted);padding:30px}.lesson-hero{padding:42px 0 24px}.lesson-hero h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.08;margin:13px 0}.objective{font-size:1.1rem;color:#dce6f8;max-width:850px}.back{display:inline-block;margin-top:20px;color:var(--gold);font-weight:800;text-decoration:none}.lesson-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(270px,1fr);gap:22px;padding-bottom:70px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;margin-bottom:20px}.panel h2{color:var(--gold);margin:0 0 14px;font-size:1.3rem}.panel h3{color:var(--cyan);font-size:1rem;margin:22px 0 8px}.teaching p{font-size:1.02rem;margin:0 0 20px}.simple{border-left:4px solid var(--cyan)}ul,ol{padding-left:22px}.example{background:#0a1020;border-left:3px solid var(--gold);padding:9px 12px;margin:8px 0;border-radius:4px}.word{display:grid;grid-template-columns:110px 1fr;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}.footer{text-align:center;color:var(--muted);border-top:1px solid var(--line);padding:25px}@media(max-width:760px){.lesson-layout{grid-template-columns:1fr}.head-note{display:none}.hero{padding-top:45px}.panel{padding:19px}}