.mark-done[data-astro-cid-jcoeg56w]{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:var(--bg-panel);border:1px solid var(--line-strong);border-radius:var(--radius-sm);color:var(--text-muted);font-family:var(--mono);font-size:14px;cursor:pointer;transition:all .2s ease}.mark-done[data-astro-cid-jcoeg56w]:hover{border-color:var(--line-gold);color:var(--text)}.mark-done[data-astro-cid-jcoeg56w].done{background:linear-gradient(135deg,var(--gold-soft),var(--gold));border-color:transparent;color:#2a1c00;font-weight:700}.mark-icon[data-astro-cid-jcoeg56w]{display:inline-flex;width:20px;height:20px;align-items:center;justify-content:center;border:1px solid currentColor;border-radius:4px;font-size:12px}.lesson-page[data-astro-cid-5y7t3r35]{padding:40px 0 20px}.crumbs[data-astro-cid-5y7t3r35]{font-size:13px;color:var(--text-faint);margin-bottom:26px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}.crumbs[data-astro-cid-5y7t3r35] a[data-astro-cid-5y7t3r35]{color:var(--text-muted)}.crumb-up[data-astro-cid-5y7t3r35]{padding:3px 10px;border:1px solid var(--line-strong);border-radius:var(--radius-sm)}.crumb-up[data-astro-cid-5y7t3r35]:hover{border-color:var(--line-gold);color:var(--gold-soft);text-decoration:none}.crumb-here[data-astro-cid-5y7t3r35]{color:var(--gold)}.toc-mobile[data-astro-cid-5y7t3r35]{margin-bottom:22px;border:1px dashed var(--line-strong);border-radius:var(--radius-sm);background:var(--bg-panel)}.toc-mobile[data-astro-cid-5y7t3r35] summary[data-astro-cid-5y7t3r35]{cursor:pointer;padding:10px 14px;font-size:13px;color:var(--gold-soft);list-style:none}.toc-mobile[data-astro-cid-5y7t3r35][open] summary[data-astro-cid-5y7t3r35]{border-bottom:1px dashed var(--line)}.toc-mobile[data-astro-cid-5y7t3r35] ul[data-astro-cid-5y7t3r35]{list-style:none;margin:0;padding:10px 14px}.toc-mobile[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35]{margin:4px 0}.toc-mobile[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35] a[data-astro-cid-5y7t3r35]{color:var(--text-muted);font-size:14px}.toc-mobile[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35].d3{padding-left:16px}@media(min-width:1120px){.toc-mobile[data-astro-cid-5y7t3r35]{display:none}}.lesson-layout[data-astro-cid-5y7t3r35]{display:grid;grid-template-columns:minmax(0,1fr);gap:48px}@media(min-width:1120px){.lesson-layout[data-astro-cid-5y7t3r35]{grid-template-columns:minmax(0,1fr) 230px}}.lesson-header[data-astro-cid-5y7t3r35]{margin-bottom:34px}.lesson-kicker[data-astro-cid-5y7t3r35]{font-size:13px;letter-spacing:.06em;margin:0 0 10px}.lesson-title[data-astro-cid-5y7t3r35]{margin:0 0 12px;font-size:clamp(26px,4.4vw,40px);line-height:1.3}.lesson-desc[data-astro-cid-5y7t3r35]{margin:0 0 18px;color:var(--text-muted);font-size:16.5px}.lesson-meta[data-astro-cid-5y7t3r35]{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px}.back-btn[data-astro-cid-5y7t3r35]{margin-top:44px}.lesson-nav[data-astro-cid-5y7t3r35]{display:flex;justify-content:space-between;gap:12px;margin-top:18px;flex-wrap:wrap}.lesson-nav[data-astro-cid-5y7t3r35] .btn[data-astro-cid-5y7t3r35]{flex-direction:column;align-items:flex-start;gap:4px;max-width:48%}.nav-next[data-astro-cid-5y7t3r35]{align-items:flex-end;text-align:right;margin-left:auto}.nav-dir[data-astro-cid-5y7t3r35]{font-size:11px;letter-spacing:.1em;color:var(--text-faint)}.lesson-nav[data-astro-cid-5y7t3r35] a[data-astro-cid-5y7t3r35]:hover .nav-dir[data-astro-cid-5y7t3r35]{color:var(--gold)}.toc[data-astro-cid-5y7t3r35]{display:none}@media(min-width:1120px){.toc[data-astro-cid-5y7t3r35]{display:block;position:sticky;top:calc(var(--header-h) + 24px);align-self:start;max-height:calc(100vh - var(--header-h) - 48px);overflow-y:auto;padding:16px 4px 16px 16px;border-left:2px solid var(--line)}.toc-title[data-astro-cid-5y7t3r35]{font-size:11px;letter-spacing:.1em;color:var(--text-faint);margin:0 0 10px}.toc[data-astro-cid-5y7t3r35] ul[data-astro-cid-5y7t3r35]{list-style:none;margin:0;padding:0}.toc[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35]{margin:2px 0}.toc[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35] a[data-astro-cid-5y7t3r35]{display:block;padding:4px 8px;font-size:13px;line-height:1.55;color:var(--text-muted);border-left:2px solid transparent;margin-left:-18px;transition:color .15s ease,border-color .15s ease}.toc[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35].d3 a[data-astro-cid-5y7t3r35]{padding-left:20px;font-size:12.5px}.toc[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35] a[data-astro-cid-5y7t3r35]:hover{color:var(--text);text-decoration:none}.toc[data-astro-cid-5y7t3r35] li[data-astro-cid-5y7t3r35] a[data-astro-cid-5y7t3r35].active{color:var(--gold-soft);border-left-color:var(--gold);font-weight:600}}