.player[data-astro-cid-rc5paijv]{flex-direction:column;min-height:100vh;display:flex}.mono[data-astro-cid-rc5paijv]{font-family:var(--font-mono)}.pbar[data-astro-cid-rc5paijv]{z-index:5;background:var(--chrome-bg);backdrop-filter:var(--chrome-blur);border-bottom:1px solid #2a303a1a;align-items:center;gap:22px;padding:12px 26px;display:flex;position:sticky;top:0}.back[data-astro-cid-rc5paijv]{font-family:var(--font-ui);color:var(--ink-soft);border:1px solid #2a303a29;border-radius:9px;align-items:center;gap:7px;padding:7px 13px;font-size:13px;font-weight:600;text-decoration:none;display:inline-flex}.back[data-astro-cid-rc5paijv]:hover{border-color:#2a303a4d}.ptitle[data-astro-cid-rc5paijv]{flex-direction:column;min-width:0;display:flex}.pk[data-astro-cid-rc5paijv]{letter-spacing:.14em;text-transform:uppercase;color:var(--ink-muted);font-size:10px;font-weight:700}.pt[data-astro-cid-rc5paijv]{font-family:var(--font-display);color:var(--ink);white-space:nowrap;text-overflow:ellipsis;font-size:16px;font-weight:600;overflow:hidden}.pmeter[data-astro-cid-rc5paijv]{align-items:center;gap:12px;margin-left:auto;display:flex}.pstep[data-astro-cid-rc5paijv]{color:var(--ink-muted);white-space:nowrap;font-size:12.5px}.pstep[data-astro-cid-rc5paijv] b[data-astro-cid-rc5paijv]{color:var(--ink)}.meter[data-astro-cid-rc5paijv]{background:#2a303a1a;border-radius:99px;width:160px;height:6px;overflow:hidden}.meterfill[data-astro-cid-rc5paijv]{background:var(--ink);border-radius:99px;width:5%;height:100%;transition:width .25s;display:block}.pmain[data-astro-cid-rc5paijv]{flex:1;grid-template-columns:288px minmax(0,1fr);align-items:start;display:grid}.prail[data-astro-cid-rc5paijv]{background:var(--paper-footer);border-right:1px solid #2a303a1a;align-self:start;max-height:calc(100vh - 55px);padding:20px 14px 40px;position:sticky;top:55px;overflow-y:auto}.prail-head[data-astro-cid-rc5paijv]{justify-content:space-between;align-items:baseline;display:flex}.prail-k[data-astro-cid-rc5paijv]{letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);font-size:11px;font-weight:700}.prail-prog[data-astro-cid-rc5paijv]{color:var(--ink-faint);font-variant-numeric:tabular-nums;font-size:11px}.prail-sub[data-astro-cid-rc5paijv]{color:var(--ink-faint);margin:3px 0 12px;font-size:11px}.rlist[data-astro-cid-rc5paijv]{margin:0;padding:0;list-style:none;position:relative}.rlist[data-astro-cid-rc5paijv]:before{content:"";background:#2a303a1a;width:2px;position:absolute;top:12px;bottom:12px;left:12px}.ritem[data-astro-cid-rc5paijv] button[data-astro-cid-rc5paijv]{text-align:left;cursor:pointer;background:0 0;border:none;border-radius:9px;align-items:flex-start;gap:11px;width:100%;padding:7px 8px;display:flex}.ritem[data-astro-cid-rc5paijv] button[data-astro-cid-rc5paijv]:hover{background:#2a303a0a}.rnode[data-astro-cid-rc5paijv]{z-index:1;background:var(--paper-card);border:1.5px solid var(--ink-faint);width:26px;height:26px;color:var(--ink-muted);border-radius:50%;flex:none;justify-content:center;align-items:center;display:flex;position:relative}.rcheck[data-astro-cid-rc5paijv]{color:#fff;font-size:13px;display:none;position:absolute}.ritem[data-astro-cid-rc5paijv].done .rnode[data-astro-cid-rc5paijv]{background:var(--fn-restored);border-color:var(--fn-restored);color:#0000}.ritem[data-astro-cid-rc5paijv].done .rnode[data-astro-cid-rc5paijv] svg[data-astro-cid-rc5paijv]{display:none}.ritem[data-astro-cid-rc5paijv].done .rcheck[data-astro-cid-rc5paijv]{display:block}.ritem[data-astro-cid-rc5paijv].current .rnode[data-astro-cid-rc5paijv]{border-color:var(--coral);color:var(--coral);border-width:2px}.rt[data-astro-cid-rc5paijv]{color:var(--ink-soft);padding-top:4px;font-size:12.5px;line-height:1.35}.ritem[data-astro-cid-rc5paijv].current .rt[data-astro-cid-rc5paijv]{color:var(--ink);font-weight:600}.ritem[data-astro-cid-rc5paijv].isnext .rt[data-astro-cid-rc5paijv]:after{content:"recommended next";letter-spacing:.04em;text-transform:uppercase;color:var(--coral-text);margin-top:2px;font-size:9.5px;font-weight:700;display:block}.stage[data-astro-cid-rc5paijv]{min-width:0;padding:30px 40px 40px;position:relative}.screen[data-astro-cid-rc5paijv]{max-width:680px;margin:0 auto}.atom-head[data-astro-cid-rc5paijv]{flex-wrap:wrap;align-items:center;gap:9px;display:flex}.kbadge[data-astro-cid-rc5paijv]{letter-spacing:.06em;text-transform:uppercase;border-radius:999px;align-items:center;gap:5px;padding:3px 10px;font-size:10px;font-weight:700;display:inline-flex}.code[data-astro-cid-rc5paijv]{color:var(--ink-muted);font-size:12px}.dot[data-astro-cid-rc5paijv]{color:var(--ink-faint)}.stepkind[data-astro-cid-rc5paijv]{color:var(--ink-muted);font-size:12px}.atom-title[data-astro-cid-rc5paijv]{font-family:var(--font-display);letter-spacing:-.015em;color:var(--ink);margin:12px 0 0;font-size:clamp(28px,4vw,40px);font-weight:500;line-height:1.08}.glance[data-astro-cid-rc5paijv]{letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);margin-top:18px;font-size:10px;font-weight:700}.gist[data-astro-cid-rc5paijv]{font-family:var(--font-body);color:#2c2823;margin:7px 0 0;font-size:18px;line-height:1.6}.hero[data-astro-cid-rc5paijv]{border-radius:18px;align-items:flex-end;min-height:200px;margin:22px 0 4px;display:flex;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffff1a,0 26px 54px -34px #0009}.hbg[data-astro-cid-rc5paijv]{background:radial-gradient(125% 120% at 80% 14%,#3a2440,#241531 56%,#10122a);position:absolute;inset:0}.hbloom[data-astro-cid-rc5paijv]{filter:blur(64px);background:radial-gradient(circle,#ffa05a73,#ff768c38 54%,#0000 72%);border-radius:50%;width:360px;height:360px;animation:26s ease-in-out infinite alternate citBreathe;position:absolute;top:-120px;right:-60px}.hcontent[data-astro-cid-rc5paijv]{padding:24px 26px;position:relative}.hkick[data-astro-cid-rc5paijv]{letter-spacing:.2em;text-transform:uppercase;color:var(--on-dark-soft);font-size:12px;font-weight:700}.hword[data-astro-cid-rc5paijv]{font-family:var(--font-display);letter-spacing:-.025em;color:var(--on-dark);font-size:64px;font-weight:500;line-height:.9}.reg-head[data-astro-cid-rc5paijv]{font-family:var(--font-display);color:var(--ink);align-items:center;gap:8px;margin:24px 0 10px;font-size:17px;font-weight:600;display:flex}.rd[data-astro-cid-rc5paijv]{border-radius:3px;width:9px;height:9px}.rd[data-astro-cid-rc5paijv].ink{background:var(--ink)}.rd[data-astro-cid-rc5paijv].blue{background:var(--fn-input)}.rdim[data-astro-cid-rc5paijv]{font-family:var(--font-ui);color:var(--ink-muted);font-size:12px;font-weight:400}.science[data-astro-cid-rc5paijv]{border-top:1px solid #2a303a1a;margin-top:22px;padding-top:4px}.science[data-astro-cid-rc5paijv] summary[data-astro-cid-rc5paijv]{cursor:pointer;font-family:var(--font-display);color:var(--ink);align-items:center;gap:8px;padding:14px 0;font-size:17px;font-weight:600;list-style:none;display:flex}.science[data-astro-cid-rc5paijv] summary[data-astro-cid-rc5paijv]::-webkit-details-marker{display:none}.science[data-astro-cid-rc5paijv] .chev[data-astro-cid-rc5paijv]{color:var(--ink-muted);margin-left:auto;transition:transform .15s}.science[data-astro-cid-rc5paijv][open] .chev[data-astro-cid-rc5paijv]{transform:rotate(180deg)}.fullentry[data-astro-cid-rc5paijv]{font-family:var(--font-ui);color:var(--fn-input);border-bottom:1px solid #2f5d7c4d;align-items:center;gap:6px;margin-top:26px;padding-bottom:1px;font-size:13px;font-weight:600;text-decoration:none;display:inline-flex}.screen[data-astro-cid-rc5paijv].atom.dys{background:var(--dark-bloom-page);max-width:none;margin:-30px -40px 0;padding:40px 40px 44px}.screen[data-astro-cid-rc5paijv].atom.dys>[data-astro-cid-rc5paijv]{max-width:680px;margin-left:auto;margin-right:auto}.screen[data-astro-cid-rc5paijv].atom.dys .atom-title[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .reg-head[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .science[data-astro-cid-rc5paijv] summary[data-astro-cid-rc5paijv]{color:var(--on-dark)}.screen[data-astro-cid-rc5paijv].atom.dys .code[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .dot[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .stepkind[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .glance[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .rdim[data-astro-cid-rc5paijv],.screen[data-astro-cid-rc5paijv].atom.dys .science[data-astro-cid-rc5paijv] .chev[data-astro-cid-rc5paijv]{color:var(--on-dark-label)}.screen[data-astro-cid-rc5paijv].atom.dys .gist[data-astro-cid-rc5paijv]{color:#e8e1dc}.screen[data-astro-cid-rc5paijv].atom.dys .science[data-astro-cid-rc5paijv]{border-top-color:#ffffff1f}.screen[data-astro-cid-rc5paijv].atom.dys .fullentry[data-astro-cid-rc5paijv]{color:var(--coral-on-dark);border-bottom-color:#ffd9de59}.screen[data-astro-cid-rc5paijv].atom.dys .hbloom[data-astro-cid-rc5paijv]{background:radial-gradient(circle,#ff6a1a80,#f0379b4d 48%,#0000 72%)}.quiz-head[data-astro-cid-rc5paijv]{align-items:center;gap:10px;display:flex}.quiz-intro[data-astro-cid-rc5paijv]{font-family:var(--font-body);color:var(--ink-soft);margin:12px 0 22px;font-size:16px;font-style:italic}.qcard[data-astro-cid-rc5paijv]{margin-bottom:22px}.q-prompt[data-astro-cid-rc5paijv]{font-family:var(--font-body);color:var(--ink);margin:0 0 16px;font-size:18px;line-height:1.5}.choices[data-astro-cid-rc5paijv]{flex-direction:column;gap:9px;display:flex}.choice[data-astro-cid-rc5paijv]{text-align:left;background:var(--paper-card);cursor:pointer;border:1px solid #2a303a1f;border-radius:12px;align-items:center;gap:13px;width:100%;padding:14px 16px;transition:border-color .14s,background .14s;display:flex}.choice[data-astro-cid-rc5paijv]:hover:not(.locked){border-color:#2a303a47}.choice[data-astro-cid-rc5paijv]:focus-visible{outline:2.5px solid var(--coral);outline-offset:2px}.choice[data-astro-cid-rc5paijv].locked{cursor:default}.cl[data-astro-cid-rc5paijv]{border:1.5px solid var(--ink-faint);width:26px;height:26px;font-family:var(--font-ui);color:var(--ink-muted);border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.ct[data-astro-cid-rc5paijv]{font-family:var(--font-body);color:var(--ink);flex:1;font-size:16px}.cmark[data-astro-cid-rc5paijv]{flex:none;width:18px}.ctag[data-astro-cid-rc5paijv]{letter-spacing:.06em;text-transform:uppercase;font-size:9.5px;font-weight:700;display:none}.choice[data-astro-cid-rc5paijv].correct{background:#3d735014;border-color:#3d735066}.choice[data-astro-cid-rc5paijv].correct .cl[data-astro-cid-rc5paijv]{background:var(--fn-restored);border-color:var(--fn-restored);color:#fff}.choice[data-astro-cid-rc5paijv].correct .ctag[data-astro-cid-rc5paijv]{color:var(--fn-restored);display:inline}.choice[data-astro-cid-rc5paijv].chosen-wrong .cl[data-astro-cid-rc5paijv]{border-color:var(--epi-unclear)}.explain[data-astro-cid-rc5paijv]{border-left:2.5px solid var(--fn-restored);background:#3d73500f;border-radius:10px;gap:11px;margin-top:14px;padding:13px 15px;display:flex}.explain[data-astro-cid-rc5paijv] .ex-ico[data-astro-cid-rc5paijv]{color:var(--fn-restored);flex:none;margin-top:1px}.explain[data-astro-cid-rc5paijv] p[data-astro-cid-rc5paijv]{font-family:var(--font-body);color:#2d352f;margin:0;font-size:15px;line-height:1.55}.q-empty[data-astro-cid-rc5paijv],.cp-empty[data-astro-cid-rc5paijv]{color:var(--ink-muted);font-style:italic}.reveal-wrap[data-astro-cid-rc5paijv]{margin-top:6px}.reveal-btn[data-astro-cid-rc5paijv]{font-family:var(--font-ui);color:#2a0a12;background:var(--fn-output);cursor:pointer;border:none;border-radius:11px;padding:12px 20px;font-size:13.5px;font-weight:700}.checkpoint[data-astro-cid-rc5paijv]{max-width:700px}.cp-card[data-astro-cid-rc5paijv]{border-radius:18px;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffff1a,0 30px 60px -36px #140c1880}.cp-bg[data-astro-cid-rc5paijv]{background:radial-gradient(125% 130% at 80% 8%,#2a3a30,#1a2a24 56%,#10182a);position:absolute;inset:0}.cp-bloom[data-astro-cid-rc5paijv]{filter:blur(64px);background:radial-gradient(circle,#5fd0a852,#0000 70%);border-radius:50%;width:320px;height:320px;animation:30s ease-in-out infinite alternate citBreathe;position:absolute;top:-130px;left:-60px}.cp-in[data-astro-cid-rc5paijv]{padding:28px 30px;position:relative}.cp-k[data-astro-cid-rc5paijv]{letter-spacing:.12em;text-transform:uppercase;color:#9fe0c0;align-items:center;gap:8px;font-size:11px;font-weight:700;display:inline-flex}.cp-title[data-astro-cid-rc5paijv]{font-family:var(--font-display);color:var(--on-dark);margin:12px 0 0;font-size:24px;font-weight:500}.cp-body[data-astro-cid-rc5paijv]{margin-top:12px}.cp-body[data-astro-cid-rc5paijv] p[data-astro-cid-rc5paijv]{font-size:16px}.cp-note[data-astro-cid-rc5paijv]{color:var(--on-dark-label);margin-top:16px;font-size:12px}.completion[data-astro-cid-rc5paijv]{max-width:1000px}.comp-hero[data-astro-cid-rc5paijv]{box-shadow:var(--shadow-dark);border-radius:18px;position:relative;overflow:hidden}.comp-bg[data-astro-cid-rc5paijv]{background:radial-gradient(120% 130% at 30% 14%,#243a3a,#18242c 50%,#10182a);position:absolute;inset:0}.comp-bloom[data-astro-cid-rc5paijv]{filter:blur(72px);background:radial-gradient(circle,#5fd0a842,#0000 70%);border-radius:50%;width:420px;height:420px;animation:30s ease-in-out infinite alternate citBreathe;position:absolute;top:-150px;right:10%}.comp-in[data-astro-cid-rc5paijv]{text-align:center;padding:48px 40px;position:relative}.comp-k[data-astro-cid-rc5paijv]{letter-spacing:.15em;text-transform:uppercase;color:#9fe0c0;align-items:center;gap:8px;font-size:11px;font-weight:700;display:inline-flex}.comp-title[data-astro-cid-rc5paijv]{font-family:var(--font-display);color:var(--on-dark);max-width:18ch;margin:14px auto 0;font-size:clamp(30px,5vw,50px);font-weight:500;line-height:1.05}.comp-sum[data-astro-cid-rc5paijv]{font-family:var(--font-body);color:var(--on-dark-soft);max-width:52ch;margin:16px auto 0;font-size:16.5px;line-height:1.6}.comp-revisit[data-astro-cid-rc5paijv]{font-family:var(--font-ui);color:var(--on-dark);cursor:pointer;background:#ffffff1a;border:1px solid #ffffff29;border-radius:11px;margin-top:24px;padding:12px 20px;font-size:13.5px;font-weight:700}.comp-onward[data-astro-cid-rc5paijv]{grid-template-columns:1fr 1fr;gap:18px;margin-top:22px;display:grid}.onward-col[data-astro-cid-rc5paijv]{background:var(--paper-card);border:1px solid #2a303a1a;border-radius:14px;padding:18px 20px}.onward-k[data-astro-cid-rc5paijv]{letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);margin-bottom:11px;font-size:10.5px;font-weight:700}.onward-link[data-astro-cid-rc5paijv]{font-family:var(--font-display);color:var(--ink);align-items:center;gap:9px;padding:7px 0;font-size:15px;text-decoration:none;display:flex}.onward-link[data-astro-cid-rc5paijv]:hover{color:var(--fn-input)}.nextcourse[data-astro-cid-rc5paijv]{flex-direction:column;gap:3px;text-decoration:none;display:flex}.nc-title[data-astro-cid-rc5paijv]{font-family:var(--font-display);color:var(--ink);font-size:18px;font-weight:500}.nc-meta[data-astro-cid-rc5paijv]{color:var(--ink-muted);font-size:12px}.pfoot[data-astro-cid-rc5paijv]{align-items:center;gap:16px;max-width:680px;margin-top:40px;margin-left:auto;margin-right:auto;padding:14px 0;display:flex;position:sticky;bottom:0}.pf-btn[data-astro-cid-rc5paijv]{font-family:var(--font-ui);cursor:pointer;background:var(--paper-card);color:var(--ink-soft);border:1px solid #2a303a2e;border-radius:11px;align-items:center;gap:8px;padding:12px 20px;font-size:14px;font-weight:700;display:inline-flex}.pf-btn[data-astro-cid-rc5paijv].next{background:var(--ink);color:var(--paper);border-color:var(--ink);margin-left:auto}.pf-btn[data-astro-cid-rc5paijv]:disabled{opacity:.4;cursor:default}.pf-rec[data-astro-cid-rc5paijv]{color:var(--ink-muted);font-size:11.5px}@media (width<=860px){.pmain[data-astro-cid-rc5paijv]{grid-template-columns:1fr}.prail[data-astro-cid-rc5paijv]{border-bottom:1px solid #2a303a1a;border-right:none;max-height:none;position:static}.rlist[data-astro-cid-rc5paijv]{grid-template-columns:1fr 1fr;gap:2px;display:grid}.rlist[data-astro-cid-rc5paijv]:before{display:none}.stage[data-astro-cid-rc5paijv]{padding:22px 18px 30px}.screen[data-astro-cid-rc5paijv].atom.dys{margin:-22px -18px 0;padding:28px 18px}.comp-onward[data-astro-cid-rc5paijv]{grid-template-columns:1fr}.meter[data-astro-cid-rc5paijv]{width:90px}}@media (prefers-reduced-motion:reduce){.hbloom[data-astro-cid-rc5paijv],.cp-bloom[data-astro-cid-rc5paijv],.comp-bloom[data-astro-cid-rc5paijv]{animation:none}.meterfill[data-astro-cid-rc5paijv]{transition:none}}