.lab[data-astro-cid-5f62endi]{margin-top:4px;scroll-margin-top:calc(var(--topbar) + 20px)}.grid[data-astro-cid-5f62endi]{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);border:1px solid var(--rule);border-radius:8px;overflow:hidden;background:var(--panel)}.problem[data-astro-cid-5f62endi]{padding:26px 28px;border-right:1px solid var(--rule);display:flex;flex-direction:column;gap:14px}.problem[data-astro-cid-5f62endi] .hd[data-astro-cid-5f62endi]{display:flex;flex-direction:column;gap:4px}.problem[data-astro-cid-5f62endi] h2[data-astro-cid-5f62endi]{font-size:1.32rem}.problem[data-astro-cid-5f62endi] p[data-astro-cid-5f62endi]{margin:0;color:var(--muted);font-size:.94rem}.problem[data-astro-cid-5f62endi] code[data-astro-cid-5f62endi]{font-size:.88rem;color:var(--ink)}.example[data-astro-cid-5f62endi]{display:flex;flex-direction:column;gap:7px}.example[data-astro-cid-5f62endi] pre[data-astro-cid-5f62endi]{margin:0;padding:14px 16px;background:var(--sunk);border-radius:var(--radius);font-size:.82rem;line-height:1.7;overflow:auto}.small[data-astro-cid-5f62endi]{font-size:.88rem;color:var(--muted)}details[data-astro-cid-5f62endi]{border:1px solid var(--rule);border-radius:var(--radius);padding:10px 14px}details[data-astro-cid-5f62endi] summary[data-astro-cid-5f62endi]{cursor:pointer;font-size:.9rem;color:var(--muted)}details[data-astro-cid-5f62endi] p[data-astro-cid-5f62endi]{margin:9px 0 0}.foot[data-astro-cid-5f62endi]{font-size:.74rem;color:var(--faint);margin-top:auto;padding-top:12px}.editor[data-astro-cid-5f62endi]{padding:22px 24px;display:flex;flex-direction:column;gap:12px;min-width:0}.bar[data-astro-cid-5f62endi]{display:flex;justify-content:space-between;align-items:baseline;font-size:.8rem;color:var(--faint)}.bar[data-astro-cid-5f62endi] label[data-astro-cid-5f62endi]{color:var(--ink)}textarea[data-astro-cid-5f62endi]{width:100%;min-height:250px;resize:vertical;padding:18px 20px;box-sizing:border-box;border:1px solid #16324C;border-radius:8px;background:#0b1522;color:#e2e8f0;font-family:IBM Plex Mono,ui-monospace,monospace;font-size:.84rem;line-height:1.75;tab-size:4}.acts[data-astro-cid-5f62endi]{display:flex;flex-wrap:wrap;gap:8px}.acts[data-astro-cid-5f62endi] button[data-astro-cid-5f62endi]{font:inherit;font-size:.85rem;padding:10px 15px;cursor:pointer;border:1px solid var(--rule);border-radius:var(--radius);background:var(--panel);color:var(--ink)}.acts[data-astro-cid-5f62endi] button[data-astro-cid-5f62endi]:hover:not(:disabled){background:var(--sunk)}.acts[data-astro-cid-5f62endi] button[data-astro-cid-5f62endi].primary{background:var(--ink);color:var(--ground);border-color:var(--ink);font-weight:600}.acts[data-astro-cid-5f62endi] button[data-astro-cid-5f62endi].quiet{color:var(--muted)}.acts[data-astro-cid-5f62endi] button[data-astro-cid-5f62endi]:disabled{opacity:.45;cursor:default}.results[data-astro-cid-5f62endi]{display:flex;flex-direction:column;gap:8px}.rhd[data-astro-cid-5f62endi]{display:flex;align-items:baseline;gap:10px}.rhd[data-astro-cid-5f62endi] [data-astro-cid-5f62endi][data-code-status]{font-size:.78rem;color:var(--muted)}.results[data-astro-cid-5f62endi] ol[data-astro-cid-5f62endi]{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.results[data-astro-cid-5f62endi] .case{display:grid;grid-template-columns:16px minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 13px;border:1px solid var(--rule);border-radius:var(--radius);font-size:.78rem}.results[data-astro-cid-5f62endi] .case .g{font-weight:700;font-size:.9rem}.results[data-astro-cid-5f62endi] .case .call{font-family:IBM Plex Mono,monospace;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.results[data-astro-cid-5f62endi] .case .got{font-family:IBM Plex Mono,monospace}.results[data-astro-cid-5f62endi] .case.is-pass .g,.results[data-astro-cid-5f62endi] .case.is-pass .got{color:var(--truth)}.results[data-astro-cid-5f62endi] .case.is-fail{border-color:var(--loss);background:color-mix(in srgb,var(--loss) 6%,transparent)}.results[data-astro-cid-5f62endi] .case.is-fail .g,.results[data-astro-cid-5f62endi] .case.is-fail .got{color:var(--loss)}[data-astro-cid-5f62endi][data-code-output]{white-space:pre-wrap;overflow-wrap:anywhere;max-height:220px;overflow:auto;background:var(--sunk);padding:12px 14px;font-size:.78rem;border-radius:var(--radius);margin:0}[data-astro-cid-5f62endi][data-code-output]:empty{display:none}@media(max-width:1100px){.grid[data-astro-cid-5f62endi]{grid-template-columns:1fr}.problem[data-astro-cid-5f62endi]{border-right:0;border-bottom:1px solid var(--rule)}}@media(max-width:600px){.problem[data-astro-cid-5f62endi],.editor[data-astro-cid-5f62endi]{padding:18px}}.test[data-astro-cid-rwn6tmg5]{margin-top:8px}.exam[data-astro-cid-rwn6tmg5]{max-width:940px}.signin[data-astro-cid-rwn6tmg5]{color:var(--muted);background:var(--sunk);padding:14px 16px;border-radius:var(--radius);border:1px solid var(--rule);max-width:var(--measure)}.bar[data-astro-cid-rwn6tmg5]{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-bottom:16px;border-bottom:1px solid var(--rule)}.bar[data-astro-cid-rwn6tmg5] h2[data-astro-cid-rwn6tmg5]{font-size:1.45rem}.bar[data-astro-cid-rwn6tmg5] .who[data-astro-cid-rwn6tmg5] p[data-astro-cid-rwn6tmg5]{margin:0 0 3px}.stats[data-astro-cid-rwn6tmg5]{display:flex;gap:26px;margin:0}.stats[data-astro-cid-rwn6tmg5] div[data-astro-cid-rwn6tmg5]{display:flex;flex-direction:column;gap:2px}.stats[data-astro-cid-rwn6tmg5] dt[data-astro-cid-rwn6tmg5]{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);font-family:IBM Plex Mono,monospace}.stats[data-astro-cid-rwn6tmg5] dd[data-astro-cid-rwn6tmg5]{margin:0;font-size:.95rem;font-weight:600}.work[data-astro-cid-rwn6tmg5]{display:grid;grid-template-columns:minmax(0,1fr) 232px;gap:28px;align-items:start;margin-top:24px}.palette[data-astro-cid-rwn6tmg5]{position:sticky;top:calc(var(--topbar) + 20px);border:1px solid var(--rule);border-radius:10px;background:var(--panel);padding:16px}.palette[data-astro-cid-rwn6tmg5] .grid[data-astro-cid-rwn6tmg5]{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:10px 0 16px}.test[data-astro-cid-rwn6tmg5] .pip{aspect-ratio:1;border:1px solid var(--rule);border-radius:6px;background:var(--ground);color:var(--muted);font:inherit;font-size:.82rem;cursor:pointer;display:grid;place-items:center;position:relative}.test[data-astro-cid-rwn6tmg5] .pip:hover{border-color:var(--muted)}.test[data-astro-cid-rwn6tmg5] .pip.is-seen{background:var(--sunk);color:var(--ink)}.test[data-astro-cid-rwn6tmg5] .pip.is-answered{background:color-mix(in srgb,var(--truth) 18%,transparent);border-color:var(--truth);color:var(--ink);font-weight:600}.test[data-astro-cid-rwn6tmg5] .pip.is-flagged:after{content:"";position:absolute;top:2px;right:2px;width:6px;height:6px;border-radius:50%;background:var(--accent)}.test[data-astro-cid-rwn6tmg5] .pip.is-current{outline:2px solid var(--bias);outline-offset:1px}.test[data-astro-cid-rwn6tmg5] .pip.is-right{background:color-mix(in srgb,var(--truth) 22%,transparent);border-color:var(--truth)}.test[data-astro-cid-rwn6tmg5] .pip.is-wrong{background:color-mix(in srgb,var(--loss) 20%,transparent);border-color:var(--loss)}.legend[data-astro-cid-rwn6tmg5]{list-style:none;margin:0 0 16px;padding:0;display:flex;flex-direction:column;gap:6px;font-size:.76rem;color:var(--muted)}.legend[data-astro-cid-rwn6tmg5] li[data-astro-cid-rwn6tmg5]{display:flex;align-items:center;gap:8px}.sw[data-astro-cid-rwn6tmg5]{width:12px;height:12px;border-radius:3px;border:1px solid var(--rule);background:var(--ground);display:inline-block;flex:none}.sw[data-astro-cid-rwn6tmg5].is-answered{background:color-mix(in srgb,var(--truth) 18%,transparent);border-color:var(--truth)}.sw[data-astro-cid-rwn6tmg5].is-flagged{background:var(--accent);border-color:var(--accent)}.sw[data-astro-cid-rwn6tmg5].is-seen{background:var(--sunk)}.sw[data-astro-cid-rwn6tmg5].is-right{background:color-mix(in srgb,var(--truth) 22%,transparent);border-color:var(--truth)}.sw[data-astro-cid-rwn6tmg5].is-wrong{background:color-mix(in srgb,var(--loss) 20%,transparent);border-color:var(--loss)}.qbox[data-astro-cid-rwn6tmg5]{min-height:240px}.test[data-astro-cid-rwn6tmg5] .qhead{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}.test[data-astro-cid-rwn6tmg5] .qhead .n{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);font-family:IBM Plex Mono,monospace}.test[data-astro-cid-rwn6tmg5] .prompt{font-size:1.12rem;line-height:1.55;margin:0 0 18px}.test[data-astro-cid-rwn6tmg5] .opts{display:flex;flex-direction:column;gap:9px;border:0;padding:0;margin:0}.test[data-astro-cid-rwn6tmg5] .opt{display:grid;grid-template-columns:20px 1fr;gap:12px;align-items:start;padding:12px 15px;border:1px solid var(--rule);border-radius:8px;background:var(--panel);cursor:pointer;line-height:1.5}.test[data-astro-cid-rwn6tmg5] .opt:hover{border-color:var(--muted)}.test[data-astro-cid-rwn6tmg5] .opt:has(input:checked){border-color:var(--bias);background:var(--sunk)}.test[data-astro-cid-rwn6tmg5] .opt input{margin-top:.35em;accent-color:var(--bias)}.test[data-astro-cid-rwn6tmg5] .opt.is-answer{border-color:var(--truth);background:color-mix(in srgb,var(--truth) 10%,transparent)}.test[data-astro-cid-rwn6tmg5] .opt.is-missed{border-color:var(--loss);background:color-mix(in srgb,var(--loss) 10%,transparent)}.test[data-astro-cid-rwn6tmg5] .tag{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin-left:8px}.test[data-astro-cid-rwn6tmg5] .why{margin:16px 0 0;padding:13px 16px;border-left:3px solid var(--bias);background:var(--sunk);border-radius:0 var(--radius) var(--radius) 0;font-size:.9rem;color:var(--muted)}.controls[data-astro-cid-rwn6tmg5]{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:26px;padding-top:18px;border-top:1px solid var(--rule)}.controls[data-astro-cid-rwn6tmg5] .left[data-astro-cid-rwn6tmg5],.controls[data-astro-cid-rwn6tmg5] .right[data-astro-cid-rwn6tmg5]{display:flex;gap:8px}.test[data-astro-cid-rwn6tmg5] button[data-astro-cid-rwn6tmg5]{font:inherit;font-size:.86rem;padding:9px 15px;cursor:pointer;border-radius:var(--radius);border:1px solid var(--rule);background:var(--panel);color:var(--ink)}.test[data-astro-cid-rwn6tmg5] button[data-astro-cid-rwn6tmg5]:hover:not(:disabled){background:var(--sunk)}.test[data-astro-cid-rwn6tmg5] button[data-astro-cid-rwn6tmg5]:disabled{opacity:.45;cursor:default}.test[data-astro-cid-rwn6tmg5] button[data-astro-cid-rwn6tmg5].primary{background:var(--ink);color:var(--ground);border-color:var(--ink);width:100%;font-weight:600}.test[data-astro-cid-rwn6tmg5] button[data-astro-cid-rwn6tmg5][data-action-flag][aria-pressed=true]{border-color:var(--accent);color:var(--accent);font-weight:600}.note[data-astro-cid-rwn6tmg5]{font-size:.76rem;color:var(--faint);margin:9px 0 0;line-height:1.45}.report[data-astro-cid-rwn6tmg5]{max-width:940px;margin-top:8px;padding:24px 26px;border:1px solid var(--rule);border-radius:10px;background:var(--panel)}.report[data-astro-cid-rwn6tmg5] .verdict[data-astro-cid-rwn6tmg5]{font-size:1.5rem;font-family:Newsreader,Georgia,serif;margin:0 0 8px}.report[data-astro-cid-rwn6tmg5].is-pass .verdict[data-astro-cid-rwn6tmg5]{color:var(--truth)}.report[data-astro-cid-rwn6tmg5].is-fail .verdict[data-astro-cid-rwn6tmg5]{color:var(--loss)}.report[data-astro-cid-rwn6tmg5] .detail[data-astro-cid-rwn6tmg5]{color:var(--muted);margin:0 0 18px}.report[data-astro-cid-rwn6tmg5] .acts[data-astro-cid-rwn6tmg5]{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.report[data-astro-cid-rwn6tmg5] .onward[data-astro-cid-rwn6tmg5]{margin-left:auto;padding:9px 17px;border-radius:var(--radius);background:var(--ink);color:var(--ground);border:1px solid var(--ink);font-size:.88rem;font-weight:600;text-decoration:none}.submitted[data-astro-cid-rwn6tmg5]{padding:11px 14px;border:1px solid var(--rule);border-radius:var(--radius);background:var(--ground);color:var(--faint);font-size:.84rem;text-align:center}@media(max-width:900px){.work[data-astro-cid-rwn6tmg5]{grid-template-columns:1fr}.palette[data-astro-cid-rwn6tmg5]{position:static;order:-1}.palette[data-astro-cid-rwn6tmg5] .grid[data-astro-cid-rwn6tmg5]{grid-template-columns:repeat(8,1fr)}}.practice-lab[data-astro-cid-ej5gjfxu],.quiz-card[data-astro-cid-ej5gjfxu]{scroll-margin-top:90px;margin-top:48px}.section-heading[data-astro-cid-ej5gjfxu]{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px}.section-heading[data-astro-cid-ej5gjfxu] h2[data-astro-cid-ej5gjfxu]{font-size:1.8rem}.section-heading[data-astro-cid-ej5gjfxu] p[data-astro-cid-ej5gjfxu]{margin:0 0 6px}.coding-grid[data-astro-cid-ej5gjfxu]{display:grid;grid-template-columns:minmax(240px,.8fr) minmax(0,1.2fr);border:1px solid var(--rule);border-radius:14px;overflow:hidden;background:var(--panel)}.problem-card[data-astro-cid-ej5gjfxu]{padding:24px;border-right:1px solid var(--rule)}.problem-card[data-astro-cid-ej5gjfxu] h3[data-astro-cid-ej5gjfxu]{font-size:1.3rem}.problem-card[data-astro-cid-ej5gjfxu] pre[data-astro-cid-ej5gjfxu]{overflow:auto;font-size:.8rem}.muted[data-astro-cid-ej5gjfxu]{font-size:.8rem;color:var(--muted)}.editor-card[data-astro-cid-ej5gjfxu]{min-width:0;padding:20px}.editor-bar[data-astro-cid-ej5gjfxu]{display:flex;justify-content:space-between;gap:8px;font-size:.8rem;margin-bottom:12px}textarea[data-astro-cid-ej5gjfxu]{width:100%;min-height:280px;resize:vertical;padding:18px;border:1px solid #334155;border-radius:8px;background:#0b1522;color:#e2e8f0;font:14px/1.7 ui-monospace,monospace;tab-size:4}.lab-actions[data-astro-cid-ej5gjfxu]{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}button[data-astro-cid-ej5gjfxu]{border:1px solid var(--rule);background:var(--panel);color:var(--ink);border-radius:7px;padding:10px 14px;font:inherit;font-size:.85rem;cursor:pointer}button[data-astro-cid-ej5gjfxu].primary{background:#1758c7;color:#fff;border-color:#1758c7}button[data-astro-cid-ej5gjfxu]:disabled{opacity:.5;cursor:wait}[data-astro-cid-ej5gjfxu][data-code-output]{white-space:pre-wrap;overflow-wrap:anywhere;max-height:250px;overflow:auto;background:var(--sunk);padding:14px;font-size:.8rem;border-radius:8px}.quiz-card[data-astro-cid-ej5gjfxu]{padding:28px;border:1px solid var(--rule);border-radius:14px;background:var(--panel)}fieldset[data-astro-cid-ej5gjfxu]{border:0;border-top:1px solid var(--rule);padding:24px 0;margin:0;min-width:0}legend[data-astro-cid-ej5gjfxu]{font-weight:600;padding-top:20px;max-width:100%}.quiz-option[data-astro-cid-ej5gjfxu]{display:flex;align-items:baseline;gap:12px;margin-top:8px;padding:10px 14px;border:1px solid var(--rule);border-radius:8px;cursor:pointer}.quiz-option[data-astro-cid-ej5gjfxu]:has(input:checked){border-color:var(--bias);background:var(--sunk)}.feedback[data-astro-cid-ej5gjfxu]{border-left:3px solid var(--bias);padding-left:14px}@media(max-width:1100px){.coding-grid[data-astro-cid-ej5gjfxu]{grid-template-columns:1fr}.problem-card[data-astro-cid-ej5gjfxu]{border-right:0;border-bottom:1px solid var(--rule)}}@media(max-width:600px){.quiz-card[data-astro-cid-ej5gjfxu],.problem-card[data-astro-cid-ej5gjfxu],.editor-card[data-astro-cid-ej5gjfxu]{padding:16px}.section-heading[data-astro-cid-ej5gjfxu]{align-items:flex-start;flex-direction:column}}.outline[data-astro-cid-v2nb7cev]{display:flex;flex-direction:column;gap:26px}.lv[data-astro-cid-v2nb7cev] header[data-astro-cid-v2nb7cev]{display:flex;flex-direction:column;gap:2px;margin-bottom:8px}.lv[data-astro-cid-v2nb7cev] header[data-astro-cid-v2nb7cev] h3[data-astro-cid-v2nb7cev]{font-size:1.02rem}.lv[data-astro-cid-v2nb7cev].is-locked{opacity:.5}.lv[data-astro-cid-v2nb7cev].is-locked header[data-astro-cid-v2nb7cev]{flex-direction:row;align-items:baseline;gap:8px;flex-wrap:wrap}ol[data-astro-cid-v2nb7cev]{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}li[data-astro-cid-v2nb7cev] a[data-astro-cid-v2nb7cev],li[data-astro-cid-v2nb7cev] .shut[data-astro-cid-v2nb7cev]{display:grid;grid-template-columns:2.4rem 1fr;gap:8px;align-items:baseline;padding:5px 8px;border-radius:3px;text-decoration:none;font-size:.89rem;line-height:1.4}li[data-astro-cid-v2nb7cev] a[data-astro-cid-v2nb7cev]{color:var(--muted)}li[data-astro-cid-v2nb7cev] a[data-astro-cid-v2nb7cev]:hover{background:var(--sunk);color:var(--ink)}li[data-astro-cid-v2nb7cev] .shut[data-astro-cid-v2nb7cev]{color:var(--faint);cursor:not-allowed}li[data-astro-cid-v2nb7cev] .n[data-astro-cid-v2nb7cev]{color:var(--faint);font-size:.74rem}li[data-astro-cid-v2nb7cev].is-current a[data-astro-cid-v2nb7cev]{background:var(--sunk);color:var(--ink);font-weight:600}li[data-astro-cid-v2nb7cev].is-current .n[data-astro-cid-v2nb7cev]{color:var(--weight)}li[data-astro-cid-v2nb7cev].is-done .t[data-astro-cid-v2nb7cev]:after{content:"✓";color:var(--truth);margin-left:6px;font-size:.82em}li[data-astro-cid-v2nb7cev].is-locked:not(.is-done) a[data-astro-cid-v2nb7cev]{color:var(--faint)}li[data-astro-cid-v2nb7cev].is-locked:not(.is-done) .t[data-astro-cid-v2nb7cev]:after{content:"🔒";margin-left:6px;font-size:.72em;opacity:.75}.done[data-astro-cid-xoqf7jut]{margin-top:40px}.done[data-astro-cid-xoqf7jut] button[data-astro-cid-xoqf7jut]{font:inherit;font-size:.92rem;padding:10px 18px;cursor:pointer;border-radius:var(--radius);border:1px solid var(--rule);background:var(--panel);color:var(--ink)}.done[data-astro-cid-xoqf7jut] button[data-astro-cid-xoqf7jut]:hover{background:var(--sunk)}.done[data-astro-cid-xoqf7jut] button[data-astro-cid-xoqf7jut][data-state=done]{border-color:var(--truth);color:var(--truth);font-weight:600}.rail[data-astro-cid-hh67uq7u]{position:sticky;top:calc(var(--topbar) + 26px);align-self:start;max-height:calc(100vh - var(--topbar) - 60px);overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding-left:20px;border-left:1px solid var(--rule);scrollbar-width:thin}.rail[data-astro-cid-hh67uq7u] ol[data-astro-cid-hh67uq7u]{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:1px}.rail[data-astro-cid-hh67uq7u] a[data-astro-cid-hh67uq7u]{display:block;padding:4px 8px;font-size:.82rem;line-height:1.4;color:var(--muted);text-decoration:none;border-radius:3px;border-left:2px solid transparent}.rail[data-astro-cid-hh67uq7u] a[data-astro-cid-hh67uq7u]:hover{color:var(--ink);background:var(--sunk)}.rail[data-astro-cid-hh67uq7u] a[data-astro-cid-hh67uq7u].is-here{color:var(--ink);border-left-color:var(--g2);background:var(--sunk);font-weight:600}.rail[data-astro-cid-hh67uq7u] .count[data-astro-cid-hh67uq7u]{font-size:.72rem;color:var(--faint);margin:4px 0 0 8px}.gate[data-astro-cid-itbul2fs]{max-width:var(--measure);margin-top:34px;padding:28px 26px;border:1px solid var(--rule);border-radius:var(--radius);background:var(--panel);display:flex;flex-direction:column;gap:12px;align-items:flex-start}.gate[data-astro-cid-itbul2fs] h2[data-astro-cid-itbul2fs]{font-size:1.4rem}.gate[data-astro-cid-itbul2fs] p[data-astro-cid-itbul2fs]{margin:0;color:var(--muted)}.gate[data-astro-cid-itbul2fs] .cta[data-astro-cid-itbul2fs]{display:inline-block;padding:10px 18px;border-radius:var(--radius);background:var(--ink);color:var(--ground);text-decoration:none;font-weight:600;font-size:.92rem;border:1px solid var(--ink);cursor:pointer;font-family:inherit}.gate[data-astro-cid-itbul2fs] .cta[data-astro-cid-itbul2fs].is-ghost{background:var(--panel);color:var(--ink);font-weight:400}.gate[data-astro-cid-itbul2fs] [data-astro-cid-itbul2fs][data-gate-auth]{display:flex;gap:8px;flex-wrap:wrap}.gate[data-astro-cid-itbul2fs] .why[data-astro-cid-itbul2fs]{font-size:.86rem;color:var(--faint);border-top:1px solid var(--rule);padding-top:14px;margin-top:4px}.shell[data-astro-cid-srewu4vx]{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr) var(--rail);max-width:1680px;margin-inline:auto;min-height:calc(100vh - var(--topbar))}aside[data-astro-cid-srewu4vx]{border-right:1px solid var(--rule);background:var(--panel);padding:22px 18px 60px;position:sticky;top:var(--topbar);height:calc(100vh - var(--topbar));overflow-y:auto;display:flex;flex-direction:column;gap:24px}main[data-astro-cid-srewu4vx]{padding:32px 48px 80px;min-width:0}.head[data-astro-cid-srewu4vx]{display:flex;flex-direction:column;gap:10px;max-width:var(--measure)}.head[data-astro-cid-srewu4vx] h1[data-astro-cid-srewu4vx]{font-size:clamp(1.8rem,3.6vw,2.5rem)}.question[data-astro-cid-srewu4vx]{font-family:Newsreader,Georgia,serif;font-size:1.2rem;line-height:1.45;color:var(--muted);margin:0;border-left:3px solid var(--accent);padding-left:14px}.tabs[data-astro-cid-srewu4vx]{display:flex;gap:4px;margin-top:14px;border-bottom:1px solid var(--rule)}.tab[data-astro-cid-srewu4vx]{padding:8px 14px;font:inherit;font-size:.88rem;color:var(--muted);border:0;border-bottom:2px solid transparent;margin-bottom:-1px;background:none;cursor:pointer}.tab[data-astro-cid-srewu4vx]:hover{color:var(--ink)}.tab[data-astro-cid-srewu4vx][aria-selected=true]{color:var(--ink);border-bottom-color:var(--weight);font-weight:600}.tab[data-astro-cid-srewu4vx].is-off{color:var(--faint);cursor:not-allowed}.focusbar[data-astro-cid-srewu4vx]{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;padding-bottom:14px;margin-bottom:4px;border-bottom:1px solid var(--rule)}.focusbar[data-astro-cid-srewu4vx] .back[data-astro-cid-srewu4vx]{font:inherit;font-size:.86rem;color:var(--bias);background:none;border:0;cursor:pointer;padding:4px 0}.focusbar[data-astro-cid-srewu4vx] .back[data-astro-cid-srewu4vx]:hover{text-decoration:underline}.focusbar[data-astro-cid-srewu4vx] .ftitle[data-astro-cid-srewu4vx]{color:var(--faint);font-size:.86rem}html:not([data-tab=lesson]) .pager[data-astro-cid-srewu4vx],html:not([data-tab=lesson]) .handoff[data-astro-cid-srewu4vx],html:not([data-tab=lesson]) .done{display:none}.handoff[data-astro-cid-srewu4vx]{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;max-width:var(--measure);margin-top:44px;padding:18px 20px;background:var(--panel);border:1px solid var(--rule);border-radius:var(--radius)}.handoff[data-astro-cid-srewu4vx] p[data-astro-cid-srewu4vx]{margin:0;color:var(--muted);font-size:.93rem}.handoff[data-astro-cid-srewu4vx] .go[data-astro-cid-srewu4vx]{display:flex;gap:9px;flex-wrap:wrap}.handoff[data-astro-cid-srewu4vx] button[data-astro-cid-srewu4vx]{font:inherit;font-size:.9rem;padding:10px 17px;cursor:pointer;border-radius:var(--radius);border:1px solid var(--rule);background:var(--panel);color:var(--ink)}.handoff[data-astro-cid-srewu4vx] button[data-astro-cid-srewu4vx]:hover{background:var(--sunk)}.handoff[data-astro-cid-srewu4vx] button[data-astro-cid-srewu4vx].primary{background:var(--ink);color:var(--ground);border-color:var(--ink);font-weight:600}.pager[data-astro-cid-srewu4vx]{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:64px;padding-top:24px;border-top:1px solid var(--rule);max-width:var(--measure)}.pager[data-astro-cid-srewu4vx] a[data-astro-cid-srewu4vx]{display:flex;flex-direction:column;gap:3px;text-decoration:none;color:var(--ink);padding:12px 14px;border:1px solid var(--rule);border-radius:var(--radius);font-size:.92rem}.pager[data-astro-cid-srewu4vx] a[data-astro-cid-srewu4vx]:hover{background:var(--sunk)}.pager[data-astro-cid-srewu4vx] .fwd[data-astro-cid-srewu4vx]{text-align:right}@media(max-width:1180px){.shell[data-astro-cid-srewu4vx]{grid-template-columns:var(--sidebar) minmax(0,1fr)}.shell[data-astro-cid-srewu4vx] .rail{display:none}}@media(max-width:900px){.shell[data-astro-cid-srewu4vx]{grid-template-columns:1fr}aside[data-astro-cid-srewu4vx]{position:static;height:auto;border-right:0;border-bottom:1px solid var(--rule)}main[data-astro-cid-srewu4vx]{padding:28px 20px 64px}.pager[data-astro-cid-srewu4vx]{grid-template-columns:1fr}}.vid[data-astro-cid-2elqpiqo]{margin-top:28px}.frame-grid[data-astro-cid-2elqpiqo]{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;align-items:start}.left[data-astro-cid-2elqpiqo]{display:flex;flex-direction:column;gap:16px;min-width:0}.frame[data-astro-cid-2elqpiqo]{aspect-ratio:16 / 9;max-width:100%;border-radius:var(--radius);overflow:hidden;border:1px solid var(--rule);background:#000}.frame[data-astro-cid-2elqpiqo] iframe[data-astro-cid-2elqpiqo]{width:100%;height:100%;border:0;display:block}.subs[data-astro-cid-2elqpiqo]{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.pill[data-astro-cid-2elqpiqo]{font:inherit;font-size:.82rem;padding:7px 14px;border-radius:999px;cursor:pointer;border:1px solid var(--rule);background:var(--panel);color:var(--muted)}.pill[data-astro-cid-2elqpiqo]:hover{color:var(--ink)}.pill[data-astro-cid-2elqpiqo][aria-pressed=true]{background:var(--ink);color:var(--ground);border-color:var(--ink);font-weight:600}.out[data-astro-cid-2elqpiqo]{margin-left:auto;font-size:.84rem}.note[data-astro-cid-2elqpiqo]{color:var(--muted);background:var(--panel);border:1px solid var(--rule);border-left:3px solid var(--bias);border-radius:0 var(--radius) var(--radius) 0;padding:14px 16px;margin:0;font-size:.92rem}.pending[data-astro-cid-2elqpiqo]{color:var(--muted);background:var(--sunk);padding:14px 16px;border-radius:var(--radius);border:1px solid var(--rule);max-width:var(--measure)}.markers[data-astro-cid-2elqpiqo]{border:1px solid var(--rule);border-radius:var(--radius);background:var(--panel);padding:16px}.markers[data-astro-cid-2elqpiqo] ol[data-astro-cid-2elqpiqo]{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:1px}.markers[data-astro-cid-2elqpiqo] button[data-astro-cid-2elqpiqo]{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:baseline;width:100%;text-align:left;font:inherit;padding:6px 8px;border:0;border-radius:3px;background:none;cursor:pointer}.markers[data-astro-cid-2elqpiqo] button[data-astro-cid-2elqpiqo]:hover{background:var(--sunk)}.markers[data-astro-cid-2elqpiqo] .t[data-astro-cid-2elqpiqo]{font-size:.74rem;color:var(--faint)}.markers[data-astro-cid-2elqpiqo] .l[data-astro-cid-2elqpiqo]{font-size:.85rem;line-height:1.4;color:var(--muted)}.markers[data-astro-cid-2elqpiqo] li[data-astro-cid-2elqpiqo].is-on button[data-astro-cid-2elqpiqo]{background:var(--sunk)}.markers[data-astro-cid-2elqpiqo] li[data-astro-cid-2elqpiqo].is-on .t[data-astro-cid-2elqpiqo]{color:var(--weight)}.markers[data-astro-cid-2elqpiqo] li[data-astro-cid-2elqpiqo].is-on .l[data-astro-cid-2elqpiqo]{color:var(--ink);font-weight:600}@media(max-width:1100px){.frame-grid[data-astro-cid-2elqpiqo]{grid-template-columns:1fr}.markers[data-astro-cid-2elqpiqo]{order:1}}