.lesson[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);background:linear-gradient(#17203099,#0a101cbf);border-radius:14px;padding:1.6rem 1.7rem}.sec-head[data-astro-cid-tzrzphjq]{align-items:baseline;gap:.6rem;display:flex}.sec-num[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);width:1.5rem;height:1.5rem;color:var(--color-gold);background:#e4bf8314;border-radius:999px;flex:none;place-items:center;font-family:ui-sans-serif,system-ui;font-size:.72rem;font-weight:700;display:inline-grid;transform:translateY(-2px)}.fig[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);background:#060b158c;border-radius:10px;padding:1rem .8rem .7rem}.fig[data-astro-cid-tzrzphjq] figcaption[data-astro-cid-tzrzphjq]{text-align:center;color:var(--color-ink-mute);margin-top:.55rem;max-width:44ch;margin-inline:auto;font-size:.78rem;font-style:italic;line-height:1.45}.throughline[data-astro-cid-tzrzphjq]{border-left:3px solid var(--color-gold);color:var(--color-gold-bright);background:#e4bf830f;border-radius:0 8px 8px 0;margin-top:1rem;padding:.55rem .9rem;font-style:italic}.example[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);background:var(--color-navy-2);border-radius:10px;padding:1rem 1.1rem}.step[data-astro-cid-tzrzphjq] summary[data-astro-cid-tzrzphjq]{cursor:pointer;border:1px solid var(--color-gold-faint);color:var(--color-gold);transition:border-color .18s var(--ease-wipe), background .18s var(--ease-wipe);border-radius:999px;padding:3px 12px;font-size:.8rem;list-style:none;display:inline-block}.step[data-astro-cid-tzrzphjq] summary[data-astro-cid-tzrzphjq]:hover{border-color:var(--color-gold);background:#e4bf8312}.step[data-astro-cid-tzrzphjq][open] summary[data-astro-cid-tzrzphjq]{color:var(--color-ink-mute);border-color:#0000;padding-left:0}.step-answer[data-astro-cid-tzrzphjq] summary[data-astro-cid-tzrzphjq]{border-color:#e4bf8373;font-weight:700}.step-hint[data-astro-cid-tzrzphjq]{margin-right:.5rem;display:inline-block}.step-hint[data-astro-cid-tzrzphjq] summary[data-astro-cid-tzrzphjq]{color:var(--color-ink-mute);border-style:dashed}.step-hint[data-astro-cid-tzrzphjq] summary[data-astro-cid-tzrzphjq]:hover{color:var(--color-gold)}.step-hint[data-astro-cid-tzrzphjq][open]{margin-right:0;display:block}.step-hint[data-astro-cid-tzrzphjq][open] p[data-astro-cid-tzrzphjq]{color:var(--color-ink-mute);font-size:.9rem;font-style:italic}.key-ideas[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);background:#e4bf830d;border-radius:10px;padding:.9rem 1.1rem}.key-idea[data-astro-cid-tzrzphjq]{color:var(--color-ink-soft);counter-increment:keyidea;padding-left:1.4rem;font-size:.95rem;line-height:1.55;position:relative}.key-idea[data-astro-cid-tzrzphjq]:before{content:counter(keyidea);width:1rem;height:1rem;color:var(--color-gold);background:#e4bf8326;border-radius:999px;place-items:center;font-family:ui-sans-serif,system-ui;font-size:.62rem;font-weight:700;display:inline-grid;position:absolute;top:.15rem;left:0}.key-ideas[data-astro-cid-tzrzphjq] ol[data-astro-cid-tzrzphjq]{counter-reset:keyidea;list-style:none}.pitfall[data-astro-cid-tzrzphjq]{border-left:3px solid var(--color-oxblood);color:var(--color-ink-soft);background:#6e2b2b1a;border-radius:0 8px 8px 0;padding:.5rem .9rem;font-size:.92rem}.strategy-line[data-astro-cid-tzrzphjq]:before{content:"— ";color:var(--color-gold)}.try-bar[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);cursor:pointer;width:100%;height:26px;transition:border-color .18s var(--ease-wipe);background:#060b1580;border-radius:999px;padding:0;display:block;position:relative;overflow:hidden}.try-bar[data-astro-cid-tzrzphjq]:hover{border-color:var(--color-gold)}.gates-cta[data-astro-cid-tzrzphjq]{color:var(--color-ink-soft);border-top:1px solid var(--color-gold-faint);padding-top:.9rem;font-size:.95rem}.try-fill[data-astro-cid-tzrzphjq]{background:#e4bf8329;transition:inset-inline-end 1s linear;position:absolute;inset:0 100% 0 0}.try-label[data-astro-cid-tzrzphjq]{text-align:center;color:var(--color-ink-mute);letter-spacing:.04em;font-size:.72rem;line-height:26px;display:block;position:relative}.choice[data-astro-cid-tzrzphjq]{text-align:left;border:1px solid var(--color-gold-faint);background:var(--color-navy-2);color:var(--color-ink-soft);transition:border-color .18s var(--ease-wipe), background .18s var(--ease-wipe);border-radius:8px;padding:.55rem .8rem;font-size:.9rem}.choice[data-astro-cid-tzrzphjq]:hover{border-color:var(--color-gold)}.choice[data-astro-cid-tzrzphjq].right{border-color:var(--color-ok);color:#bfe6d7;background:#7bc6aa1f}.choice[data-astro-cid-tzrzphjq].wrong{color:#e8c4c4;background:#6e2b2b24;border-color:#d98a8a}.check-why[data-astro-cid-tzrzphjq]{color:var(--color-gold-bright)}.check-history[data-astro-cid-tzrzphjq]{color:var(--color-ink-mute);margin-top:.4rem;margin-left:.7rem;font-size:.75rem;display:inline-block}.reask-badge[data-astro-cid-tzrzphjq]{letter-spacing:.06em;text-transform:uppercase;color:var(--color-gold);margin-bottom:.4rem;font-size:.72rem;font-weight:700}.sec-fold[data-astro-cid-tzrzphjq]>.sec-fold-sum[data-astro-cid-tzrzphjq]{cursor:pointer;list-style:none}.sec-fold[data-astro-cid-tzrzphjq]>.sec-fold-sum[data-astro-cid-tzrzphjq]::-webkit-details-marker{display:none}.sec-fold[data-astro-cid-tzrzphjq]:not([open])>.sec-fold-sum[data-astro-cid-tzrzphjq] .sec-head[data-astro-cid-tzrzphjq]:after{content:" — read this section ▾";font-family:var(--font-sans,inherit);letter-spacing:.06em;color:var(--color-gold);font-size:.72rem;font-weight:700}.sec-fold[data-astro-cid-tzrzphjq][open]>.sec-fold-sum[data-astro-cid-tzrzphjq] .sec-head[data-astro-cid-tzrzphjq]:after{content:" ▴";color:var(--color-ink-mute)}.cr-scratch[data-astro-cid-tzrzphjq]{border:1px solid var(--color-gold-faint);background:var(--color-navy-2);width:100%;color:var(--color-ink-soft);border-radius:8px;padding:.7rem .9rem;font-size:.9rem}.cr-scratch[data-astro-cid-tzrzphjq]:focus{border-color:var(--color-gold);outline:none}.cr-btn[data-astro-cid-tzrzphjq]{color:var(--color-navy);background:linear-gradient(90deg,#f3ead7,#e4bf83);border-radius:8px;padding:.5rem 1rem;font-size:.85rem;font-weight:800}.cr-btn[data-astro-cid-tzrzphjq]:disabled{opacity:.5}.ladder-rung[data-astro-cid-tzrzphjq]{border-top:1px solid var(--color-gold-faint);padding-top:.8rem}.rung-done[data-astro-cid-tzrzphjq]{color:var(--color-gold);border:1px solid var(--color-gold-faint);border-radius:7px;padding:.25rem .7rem;font-size:.78rem;font-weight:700}.rung-done[data-astro-cid-tzrzphjq]:hover{border-color:var(--color-gold)}.repair-link[data-astro-cid-tzrzphjq]{color:var(--color-gold);text-underline-offset:2px;font-weight:600;text-decoration:underline}.repair-link[data-astro-cid-tzrzphjq]:hover{color:var(--color-gold-bright)}.state-badge[data-astro-cid-tzrzphjq]{letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--color-gold-faint);color:var(--color-ink-mute);border-radius:99px;padding:.08rem .45rem;font-size:.68rem;font-style:normal;font-weight:800}.state-badge[data-astro-cid-tzrzphjq][data-state=reading]{color:var(--color-gold);border-color:#e4bf8373}.state-badge[data-astro-cid-tzrzphjq][data-state=checked]{color:var(--color-gold-bright);border-color:var(--color-gold)}.state-badge[data-astro-cid-tzrzphjq][data-state=mastered]{color:var(--color-navy);background:linear-gradient(90deg,#f3ead7,#e4bf83);border-color:#0000}.resume-chip[data-astro-cid-tzrzphjq]{color:var(--color-gold);border:1px solid var(--color-gold-faint);border-radius:99px;margin-bottom:.8rem;padding:.25rem .8rem;font-size:.78rem;font-weight:700;display:inline-block}.resume-chip[data-astro-cid-tzrzphjq]:hover{border-color:var(--color-gold);color:var(--color-gold-bright)}.retake[data-astro-cid-tzrzphjq]{color:var(--color-ink-mute);text-underline-offset:3px;cursor:pointer;background:0 0;border:none;margin-top:.4rem;padding:0;font-size:.78rem;text-decoration:underline}.retake[data-astro-cid-tzrzphjq]:hover{color:var(--color-gold)}.check[data-astro-cid-tzrzphjq].done .choice[data-astro-cid-tzrzphjq]{pointer-events:none;opacity:.75}.check[data-astro-cid-tzrzphjq].done .choice[data-astro-cid-tzrzphjq].right,.check[data-astro-cid-tzrzphjq].done .choice[data-astro-cid-tzrzphjq].wrong{opacity:1}.wk-sticky[data-astro-cid-rvgaxxrb]{z-index:30;backdrop-filter:blur(6px);border-bottom:1px solid var(--color-gold-faint);background:#060b15eb;position:sticky;top:0}main.remaining-only [data-astro-cid-rvgaxxrb][data-gate][data-done="1"]{display:none}[data-astro-cid-rvgaxxrb][data-toggle-remaining][aria-pressed=true]{border-color:var(--color-gold);color:var(--color-gold-bright)}.gate-card[data-astro-cid-rvgaxxrb]{overflow-wrap:anywhere;border:1px solid var(--color-gold-faint);background:var(--color-navy-panel);border-left-width:3px;border-radius:10px;padding:1rem 1.2rem}.gate-card[data-astro-cid-rvgaxxrb][data-done="1"]{border-left-color:var(--color-gold)}.gate-card[data-astro-cid-rvgaxxrb][data-done="1"] [data-astro-cid-rvgaxxrb][data-gate-state]{color:var(--color-gold)}.ref-link[data-astro-cid-rvgaxxrb]{margin-left:6px}.track-sep[data-astro-cid-rvgaxxrb]{letter-spacing:.18em;text-transform:uppercase;color:var(--color-gold);opacity:.85;margin:1.4rem 0 .1rem;font:700 .68rem Manrope,sans-serif}.pager-card[data-astro-cid-rvgaxxrb]{border:1px solid var(--color-gold-faint);background:var(--color-navy-panel);border-radius:10px;padding:.7rem .9rem;transition:border-color .18s;display:block}.pager-card[data-astro-cid-rvgaxxrb]:hover{border-color:var(--color-gold)}.crumb-sep[data-astro-cid-rvgaxxrb]{color:var(--color-ink-mute);opacity:.7;margin:0 .45rem}.gate-echo[data-astro-cid-rvgaxxrb]{color:var(--color-ink-mute);font-style:italic}.phase-banner[data-astro-cid-rvgaxxrb]{border-bottom:1px solid var(--color-gold-faint);height:120px;position:relative;overflow:hidden}.phase-banner[data-astro-cid-rvgaxxrb] img[data-astro-cid-rvgaxxrb]{object-fit:cover;object-position:center 40%;opacity:.5;width:100%;height:100%}.phase-banner[data-astro-cid-rvgaxxrb] .pb-veil[data-astro-cid-rvgaxxrb]{background:linear-gradient(#060b1559 30%,#060b15f7 92%);position:absolute;inset:0}.accel-badge[data-astro-cid-rvgaxxrb]{vertical-align:middle;border:1px solid var(--color-gold-faint);letter-spacing:.12em;text-transform:uppercase;color:var(--color-gold);border-radius:999px;margin-left:.4rem;padding:1px 8px;font:700 .62rem Manrope,sans-serif}.level-chip[data-astro-cid-rvgaxxrb]{border:1px solid var(--color-gold-faint);color:var(--color-ink-mute);white-space:nowrap;border-radius:999px;margin-left:.4rem;padding:0 7px;font-size:.7rem}.gate-ritual[data-astro-cid-rvgaxxrb]{color:var(--color-ink-soft);border-left:2px solid var(--color-gold-faint);padding-left:.6rem}.gate-text[data-astro-cid-rvgaxxrb]{font-size:.92rem;line-height:1.6}.gate-fold-sum[data-astro-cid-rvgaxxrb]{cursor:pointer;letter-spacing:.14em;text-transform:uppercase;color:var(--color-gold);margin-top:.4rem;padding:.4rem 0;font:700 .7rem Manrope,sans-serif;list-style:none;display:block}html.force-motion .gate-fold[data-astro-cid-rvgaxxrb][open]>ul[data-astro-cid-rvgaxxrb],html.force-motion .gate-fold[data-astro-cid-rvgaxxrb][open]>.gate-text[data-astro-cid-rvgaxxrb]{animation:foldIn var(--dur-slow) ease both}@keyframes foldIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}.toc-chip[data-astro-cid-rvgaxxrb]{border:1px solid var(--color-gold-faint);color:var(--color-gold);border-radius:999px;padding:.25rem .8rem;font-size:.78rem;transition:border-color .18s,background .18s}.toc-chip[data-astro-cid-rvgaxxrb]:hover{border-color:var(--color-gold);background:#e4bf8312}.row-k[data-astro-cid-rvgaxxrb]{letter-spacing:.14em;text-transform:uppercase;min-width:4.6rem;color:var(--color-gold);font:700 .62rem Manrope,sans-serif;display:inline-block}