:root{--ink: #1f1b3a;--muted: #5b5778;--brand: #6366f1;--brand-2: #8b5cf6;--bg: #f6f5ff;--card: #fff;--line: #e6e3f5;--ok: #0f7a4a}*{box-sizing:border-box}body{margin:0;font-family:Rubik,Assistant,Heebo,system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}a{color:var(--brand)}.lp-top{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:12px 16px;background:var(--card);border-bottom:1px solid var(--line)}.lp-brand{font-weight:800;font-size:1.15rem;text-decoration:none;color:var(--ink)}.lp-cta{display:flex;gap:8px;flex-wrap:wrap;margin:0}.lp-btn{display:inline-block;padding:9px 14px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:700;text-decoration:none}.lp-btn--ghost{background:var(--card);color:var(--brand);border:2px solid var(--line)}.lp{max-width:820px;margin:0 auto;padding:18px 16px 40px}.lp-crumbs{font-size:.9rem;color:var(--muted);margin-bottom:10px}.lp-crumbs a{text-decoration:none}h1{font-size:clamp(1.5rem,4vw,2rem);line-height:1.3;margin:6px 0 8px}.lp-sub{display:block;font-size:1rem;font-weight:500;color:var(--muted);margin-top:4px}h2{font-size:1.25rem;margin:0 0 8px}h3{font-size:1.05rem;margin:0 0 4px}.lp-lead{color:var(--muted);font-size:1.05rem}.lp-muted{color:var(--muted)}.lp-small{font-size:.9rem}.lp-grade,.lp-sample,.lp-join{background:var(--card);border-radius:16px;padding:16px 18px;margin:14px 0;box-shadow:0 2px 10px #3c328c12}.lp-chips{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}.lp-chips a{display:inline-block;padding:6px 12px;border-radius:999px;background:var(--bg);border:1px solid var(--line);text-decoration:none;font-weight:600}.lp-units,.lp-lessons{padding-inline-start:22px;display:grid;gap:12px}.lp-units>li,.lp-lessons>li{background:var(--card);border-radius:14px;padding:12px 14px;box-shadow:0 1px 6px #3c328c0f}.lp-units a{font-weight:700;text-decoration:none}.lp-lessons p{margin:0}.lp-q{font-weight:600;font-size:1.08rem}.lp-opts{padding-inline-start:22px}details summary{cursor:pointer;font-weight:700;color:var(--brand)}details p{color:var(--ok)}.lp-nav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:18px}.lp-nav a{font-weight:600;text-decoration:none}.lp-join{text-align:center;background:linear-gradient(135deg,#eef0ff,#f5edff)}.lp-join .lp-cta{justify-content:center}.lp-foot{text-align:center;color:var(--muted);font-size:.85rem;padding:18px 16px 28px}bdi{unicode-bidi:isolate}.ltr-run{display:inline-block;direction:ltr;unicode-bidi:isolate}.lp-steps{background:var(--card);border-radius:16px;padding:14px 18px;padding-inline-start:38px;margin:14px 0;box-shadow:0 2px 10px #3c328c12;display:grid;gap:6px}.lp-cta-link{display:inline-block;margin:6px 0 2px;padding:8px 14px;border-radius:12px;background:var(--card);border:2px solid var(--line);font-weight:700;text-decoration:none}