html,body{overflow:hidden;height:100vh}.lesson-screen[data-astro-cid-fvgqvmki]{height:calc(100vh - 52px);display:flex;align-items:center;justify-content:center;overflow:hidden}.review-intro-wrap[data-astro-cid-fvgqvmki],.review-debrief-wrap[data-astro-cid-fvgqvmki]{max-width:540px;width:100%;padding:2rem 1.5rem;display:flex;flex-direction:column;align-items:center;gap:1.2rem;text-align:center}.review-stamp[data-astro-cid-fvgqvmki]{display:inline-flex;flex-direction:column;align-items:flex-start;padding:.55rem 1rem .6rem;border:1.5px solid var(--cyan);background:#00e4ff0d;transform:rotate(-1.2deg)}.review-stamp-line[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.22em;color:var(--cyan);opacity:.8}.review-stamp-mission[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:1rem;font-weight:700;color:var(--cyan);letter-spacing:.04em}.review-intro-title[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:clamp(1.6rem,3.5vw,2.4rem);font-weight:700;color:var(--text-primary);line-height:1.15;margin:0}.review-intro-context[data-astro-cid-fvgqvmki]{font-size:1rem;line-height:1.6;color:var(--text-secondary);font-style:italic;margin:0;max-width:440px}.review-intro-stats[data-astro-cid-fvgqvmki],.review-debrief-stats[data-astro-cid-fvgqvmki]{display:flex;gap:2rem;padding:1rem 0;border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle);margin:.4rem 0}.review-stat[data-astro-cid-fvgqvmki]{display:flex;flex-direction:column;align-items:center;gap:.2rem}.review-stat-v[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:1.4rem;font-weight:700;color:var(--text-primary)}.review-stat-l[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.14em;color:var(--text-dim);text-transform:uppercase}.review-intro-pips[data-astro-cid-fvgqvmki]{display:flex;gap:.6rem;margin:.3rem 0}.review-pip[data-astro-cid-fvgqvmki]{width:10px;height:10px;border-radius:50%;background:#ffffff1a;border:1px solid rgba(255,255,255,.15);transition:background .3s,border-color .3s,transform .3s}.review-pip[data-astro-cid-fvgqvmki].active{background:var(--cyan);border-color:var(--cyan);box-shadow:0 0 10px #00e4ff66;transform:scale(1.15)}.review-pip[data-astro-cid-fvgqvmki].clean{background:var(--success);border-color:var(--success)}.review-pip[data-astro-cid-fvgqvmki].recovered{background:var(--amber);border-color:var(--amber)}.review-pip[data-astro-cid-fvgqvmki].miss{background:var(--danger);border-color:var(--danger)}.review-intro-btn[data-astro-cid-fvgqvmki]{min-width:220px;font-size:1rem;padding:.9rem 2rem;margin-top:.4rem}.review-intro-cancel[data-astro-cid-fvgqvmki]{color:var(--text-dim);font-size:.78rem;text-decoration:none;margin-top:.4rem}.review-intro-cancel[data-astro-cid-fvgqvmki]:hover{color:var(--text-secondary)}.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-pass .review-stamp-mission[data-astro-cid-fvgqvmki],.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-pass .review-stamp-line[data-astro-cid-fvgqvmki]{color:var(--success)}.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-pass{border-color:var(--success);background:#34d39914}.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-shaky .review-stamp-mission[data-astro-cid-fvgqvmki],.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-shaky .review-stamp-line[data-astro-cid-fvgqvmki]{color:var(--amber)}.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-shaky{border-color:var(--amber);background:#d4a44a14}.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-fail .review-stamp-mission[data-astro-cid-fvgqvmki],.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-fail .review-stamp-line[data-astro-cid-fvgqvmki]{color:var(--danger)}.review-debrief-stamp[data-astro-cid-fvgqvmki].stamp-fail{border-color:var(--danger);background:#ef444414}.review-score[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:3.2rem;font-weight:700;color:var(--text-primary);line-height:1;display:flex;align-items:baseline;gap:.15rem}.review-score-slash[data-astro-cid-fvgqvmki]{font-size:1.8rem;color:var(--text-dim);margin:0 .1rem}.review-score-label[data-astro-cid-fvgqvmki]{font-size:.86rem;color:var(--text-secondary);margin-top:-.5rem}.review-interval-card[data-astro-cid-fvgqvmki]{width:100%;max-width:440px;padding:1rem 1.2rem;background:#00e4ff0a;border:1px solid rgba(0,228,255,.18);border-radius:var(--radius-md);text-align:left}.review-interval-label[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.18em;color:var(--cyan);margin-bottom:.5rem}.review-interval-body[data-astro-cid-fvgqvmki]{font-size:.95rem;line-height:1.55;color:var(--text-primary)}.review-interval-body[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--cyan);font-weight:600}.review-pip-chips[data-astro-cid-fvgqvmki]{display:flex;gap:.5rem;margin-top:.2rem;flex-wrap:wrap;justify-content:center}.review-pip-chips[data-astro-cid-fvgqvmki] .review-pip[data-astro-cid-fvgqvmki]{width:14px;height:14px}.review-debrief-actions[data-astro-cid-fvgqvmki]{display:flex;flex-direction:column;align-items:center;gap:.4rem;margin-top:.8rem}@media(max-width:540px){.review-intro-stats[data-astro-cid-fvgqvmki],.review-debrief-stats[data-astro-cid-fvgqvmki]{gap:1.2rem}.review-score[data-astro-cid-fvgqvmki]{font-size:2.4rem}.review-intro-title[data-astro-cid-fvgqvmki]{font-size:1.5rem}}.narr-split[data-astro-cid-fvgqvmki]{display:flex;width:100%;height:100%}.narr-image[data-astro-cid-fvgqvmki]{width:45%;background-size:cover;background-position:center;position:relative}.narr-image[data-astro-cid-fvgqvmki]:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 60%,var(--void) 100%)}.narr-content[data-astro-cid-fvgqvmki]{width:55%;display:flex;flex-direction:column;justify-content:flex-start;padding:5.5rem 3.5rem 2.5rem 2.5rem;max-width:600px;overflow-y:auto;scrollbar-width:none}.narr-content[data-astro-cid-fvgqvmki]::-webkit-scrollbar{display:none}.narr-location[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.72rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim);margin-bottom:1.5rem}.narr-text[data-astro-cid-fvgqvmki]{font-size:1.35rem;line-height:1.85;color:var(--text-secondary);font-style:italic}.narr-text[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--text-primary);font-style:normal;font-weight:500}.narr-accent[data-astro-cid-fvgqvmki]{margin-top:2rem;font-family:var(--font-mono);font-size:.78rem;color:var(--text-dim);letter-spacing:.05em}.teach-split[data-astro-cid-fvgqvmki]{display:flex;width:100%;height:100%}.teach-image[data-astro-cid-fvgqvmki]{width:35%;background-size:cover;background-position:center;position:relative}.teach-image[data-astro-cid-fvgqvmki]:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 50%,var(--void) 100%)}.teach-content[data-astro-cid-fvgqvmki]{width:65%;display:flex;flex-direction:column;justify-content:flex-start;padding:5.5rem 4rem 3rem 3rem;max-width:680px;overflow-y:auto;scrollbar-width:none}.teach-content[data-astro-cid-fvgqvmki]::-webkit-scrollbar{display:none}.teach-label[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;color:var(--mars-bright);margin-bottom:.5rem}.teach-title[data-astro-cid-fvgqvmki]{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary)}.teach-body[data-astro-cid-fvgqvmki]{font-size:1.2rem;line-height:1.85;color:var(--text-secondary)}.teach-body[data-astro-cid-fvgqvmki] p[data-astro-cid-fvgqvmki]{margin:0}.teach-body[data-astro-cid-fvgqvmki] p[data-astro-cid-fvgqvmki]+p[data-astro-cid-fvgqvmki]{margin-top:1.2rem}.teach-body[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--text-primary);font-weight:500}.teach-body[data-astro-cid-fvgqvmki] .highlight[data-astro-cid-fvgqvmki]{color:var(--cyan);font-family:var(--font-mono);font-size:1.05rem}.teach-visual[data-astro-cid-fvgqvmki]{background:var(--surface-1);border-radius:10px;padding:1.5rem;margin-top:1.5rem;font-family:var(--font-mono);font-size:.88rem;line-height:1.7;color:var(--text-secondary);white-space:pre}.teach-visual.viz-rich,.prob-visual.viz-rich{font-family:var(--font-body);white-space:normal;line-height:1.5}.viz-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;align-items:end}.viz-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;align-items:end}.viz-cell{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding:.5rem .25rem}.viz-cell svg{width:100%;max-width:90px;height:auto;background:#ffffff08;border-radius:6px}.viz-label{font-family:var(--font-display);font-size:.88rem;font-weight:600;color:var(--text-primary);letter-spacing:.02em}.viz-sub{font-family:var(--font-mono);font-size:.72rem;color:var(--text-dim);letter-spacing:.05em}.viz-footnote{margin-top:1rem;padding-top:.85rem;border-top:1px solid var(--border-subtle);font-size:.82rem;color:var(--text-secondary);text-align:center}@media(max-width:540px){.viz-grid-4{grid-template-columns:repeat(2,1fr)}.viz-grid-3{grid-template-columns:1fr}}.prob-layout[data-astro-cid-fvgqvmki]{display:flex;width:100%;height:100%}.prob-scene[data-astro-cid-fvgqvmki]{width:35%;background-size:cover;background-position:center;position:relative}.prob-scene[data-astro-cid-fvgqvmki]:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 40%,var(--void) 100%)}.prob-card[data-astro-cid-fvgqvmki]{width:65%;display:flex;flex-direction:column;justify-content:center;padding:2rem 3rem 2rem 2rem;max-width:680px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.08) transparent}.prob-narrative[data-astro-cid-fvgqvmki]{font-size:.88rem;color:var(--text-dim);font-style:italic;margin-bottom:1.5rem;padding-left:1rem;opacity:.75}.prob-question[data-astro-cid-fvgqvmki]{font-size:1.25rem;line-height:1.7;color:var(--text-primary);margin-bottom:1.5rem;font-weight:400}.prob-visual[data-astro-cid-fvgqvmki]{background:var(--surface-1);border-radius:10px;padding:1.2rem;margin-bottom:1.5rem;font-family:var(--font-mono);font-size:.88rem;line-height:1.6;color:var(--text-secondary);white-space:pre;text-align:center}.prob-card[data-astro-cid-fvgqvmki] .answer-input[data-astro-cid-fvgqvmki]{background:var(--surface-1);border:2px solid var(--border-default);color:var(--text-primary);font-size:1.5rem;padding:1rem;border-radius:10px}.prob-card[data-astro-cid-fvgqvmki] .answer-input[data-astro-cid-fvgqvmki]:focus{border-color:var(--cyan)}.prob-card[data-astro-cid-fvgqvmki] .answer-input[data-astro-cid-fvgqvmki].correct{border-color:var(--success);background:#34d3990a}.prob-card[data-astro-cid-fvgqvmki] .answer-input[data-astro-cid-fvgqvmki].incorrect{border-color:var(--danger);background:#ef44440a}.prob-card[data-astro-cid-fvgqvmki] .choice-pills[data-astro-cid-fvgqvmki]{gap:.6rem}.prob-card[data-astro-cid-fvgqvmki] .choice-pill[data-astro-cid-fvgqvmki]{background:var(--surface-2);border:2px solid var(--border-strong);color:var(--text-primary);font-size:1.1rem;padding:.7rem 1.4rem;border-radius:100px}.prob-card[data-astro-cid-fvgqvmki] .choice-pill[data-astro-cid-fvgqvmki]:hover{border-color:var(--cyan)}.prob-card[data-astro-cid-fvgqvmki] .choice-pill[data-astro-cid-fvgqvmki].selected{border-color:var(--cyan);background:#00e4ff0f;color:var(--cyan)}.prob-card[data-astro-cid-fvgqvmki] .choice-pill[data-astro-cid-fvgqvmki].correct{border-color:var(--success);background:#34d3990f;color:var(--success)}.prob-card[data-astro-cid-fvgqvmki] .choice-pill[data-astro-cid-fvgqvmki].incorrect{border-color:var(--danger);background:#ef44440f;color:var(--danger)}.prob-card[data-astro-cid-fvgqvmki] .feedback[data-astro-cid-fvgqvmki]{font-size:.95rem}.feedback-xp[data-astro-cid-fvgqvmki]{margin-left:auto;font-family:var(--font-display);font-size:.78rem;font-weight:600;letter-spacing:.04em;padding:.15rem .5rem;border-radius:100px;animation:xpPop .4s cubic-bezier(.22,1,.36,1)}.feedback[data-astro-cid-fvgqvmki].correct .feedback-xp[data-astro-cid-fvgqvmki]{color:var(--amber);background:#d4a44a1a}.feedback[data-astro-cid-fvgqvmki].incorrect .feedback-xp[data-astro-cid-fvgqvmki]{color:var(--text-dim);background:#ffffff0a}@keyframes xpPop{0%{opacity:0;transform:scale(.7) translateY(4px)}to{opacity:1;transform:scale(1) translateY(0)}}.narr-action[data-astro-cid-fvgqvmki]{margin-top:2rem}.prob-practice[data-astro-cid-fvgqvmki]{margin-top:1rem}.btn-practice[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.78rem;letter-spacing:.04em;color:#7a7a8a;background:none;border:1.5px solid #d0d0d8;padding:.5rem 1.2rem;border-radius:100px;cursor:pointer;transition:all .2s}.btn-practice[data-astro-cid-fvgqvmki]:hover{border-color:var(--cyan);color:#007a8a}.btn-explain[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.78rem;letter-spacing:.04em;color:var(--amber);background:none;border:1.5px solid var(--amber);padding:.5rem 1.2rem;border-radius:100px;cursor:pointer;transition:all .2s;margin-right:.75rem}.btn-explain[data-astro-cid-fvgqvmki]:hover{background:#d4a44a14;border-color:var(--amber);box-shadow:0 0 12px #d4a44a26}.btn-demystify[data-astro-cid-fvgqvmki]{font-family:var(--font-body);font-size:.82rem;color:var(--cyan);background:#00e4ff0a;border:1px solid rgba(0,228,255,.25);padding:.5rem 1rem;border-radius:100px;cursor:pointer;transition:all .2s}.btn-demystify[data-astro-cid-fvgqvmki]:hover{background:#00e4ff1a;border-color:#00e4ff80;box-shadow:0 0 14px #00e4ff26}.demystify-overlay[data-astro-cid-fvgqvmki]{display:none;position:fixed;inset:0;z-index:160;background:#06060cdb;backdrop-filter:blur(12px);align-items:center;justify-content:center;padding:1.5rem;animation:explainFadeIn .3s ease}.demystify-overlay[data-astro-cid-fvgqvmki].open{display:flex}.demystify-panel[data-astro-cid-fvgqvmki]{background:var(--surface-2);border:1px solid rgba(0,228,255,.2);border-radius:18px;padding:1.6rem 1.8rem 1.4rem;max-width:580px;width:100%;max-height:85vh;overflow-y:auto;box-shadow:0 18px 60px #00000080,0 0 30px #00e4ff0f}.demystify-header[data-astro-cid-fvgqvmki]{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1.1rem;gap:1rem}.demystify-label[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.18em;color:var(--cyan);line-height:1.4}.demystify-close[data-astro-cid-fvgqvmki]{background:none;border:none;color:var(--text-dim);font-size:1.2rem;cursor:pointer;line-height:1;padding:.1rem .4rem;transition:color .2s}.demystify-close[data-astro-cid-fvgqvmki]:hover{color:var(--text-primary)}.demystify-intro[data-astro-cid-fvgqvmki]{font-size:.96rem;line-height:1.6;color:var(--text-primary);margin-bottom:1.2rem}.demystify-symbols[data-astro-cid-fvgqvmki]{display:grid;grid-template-columns:auto 1fr;gap:.6rem 1rem;margin-bottom:1.3rem;padding:.9rem 1rem;background:#00e4ff08;border:1px solid rgba(0,228,255,.1);border-radius:10px}.demystify-sym[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:1.05rem;font-weight:700;color:var(--cyan);line-height:1.4;min-width:1.4rem;text-align:center}.demystify-meaning[data-astro-cid-fvgqvmki]{font-size:.88rem;line-height:1.45;color:var(--text-primary)}.demystify-meaning[data-astro-cid-fvgqvmki] .learn-in[data-astro-cid-fvgqvmki]{display:block;font-family:var(--font-mono);font-size:.7rem;color:var(--text-dim);margin-top:.15rem}.demystify-outro[data-astro-cid-fvgqvmki]{font-size:.95rem;line-height:1.6;color:var(--text-secondary);margin-bottom:1.2rem}.demystify-foot[data-astro-cid-fvgqvmki]{display:flex;justify-content:flex-end;padding-top:.6rem;border-top:1px solid var(--border-subtle)}.gloss-term{font:inherit;color:var(--cyan);background:none;border:none;padding:0;cursor:help;border-bottom:1px dotted color-mix(in srgb,var(--cyan) 55%,transparent);transition:background .15s,border-color .15s}.gloss-term:hover{background:#00e4ff1a;border-bottom-color:var(--cyan)}.gloss-term:after{content:"°";font-size:.7em;vertical-align:super;opacity:.7;margin-left:1px}.term-scrim[data-astro-cid-fvgqvmki]{position:fixed;inset:0;background:#06060c73;backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .25s;z-index:90}.term-scrim[data-astro-cid-fvgqvmki].open{opacity:1;pointer-events:auto}.term-panel[data-astro-cid-fvgqvmki]{position:fixed;top:0;right:0;height:100vh;width:min(380px,88vw);background:linear-gradient(180deg,#0b0e1a,#07080f);border-left:1px solid rgba(0,228,255,.25);box-shadow:-20px 0 60px #00000080;padding:1.6rem 1.5rem;transform:translate(100%);transition:transform .32s cubic-bezier(.22,1,.36,1);z-index:91;overflow-y:auto;display:flex;flex-direction:column}.term-panel[data-astro-cid-fvgqvmki].open{transform:translate(0)}.term-panel-head[data-astro-cid-fvgqvmki]{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.term-panel-eyebrow[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.28em;color:var(--text-dim)}.term-panel-close[data-astro-cid-fvgqvmki]{background:none;border:none;color:var(--text-secondary);font-size:1.1rem;cursor:pointer;padding:.2rem .4rem;line-height:1}.term-panel-close[data-astro-cid-fvgqvmki]:hover{color:var(--text-primary)}.term-panel-title[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:1.5rem;color:var(--cyan);margin:0 0 .9rem;line-height:1.15}.term-panel-body[data-astro-cid-fvgqvmki]{color:var(--text-secondary);line-height:1.7;font-size:.95rem}.term-panel-body[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--text-primary);font-weight:500}.term-panel-learn[data-astro-cid-fvgqvmki]{margin-top:1.4rem;align-self:flex-start;font-family:var(--font-mono);font-size:.78rem;letter-spacing:.05em;color:var(--amber);text-decoration:none;padding:.55rem .9rem;border:1px solid rgba(212,164,74,.4);border-radius:8px;transition:background .15s}.term-panel-learn[data-astro-cid-fvgqvmki]:hover{background:#d4a44a1f}.explain-overlay[data-astro-cid-fvgqvmki]{display:none;position:fixed;inset:0;z-index:150;background:#06060cd9;backdrop-filter:blur(12px);align-items:center;justify-content:center;animation:explainFadeIn .3s ease}.explain-overlay[data-astro-cid-fvgqvmki].open{display:flex}@keyframes explainFadeIn{0%{opacity:0}to{opacity:1}}.explain-panel[data-astro-cid-fvgqvmki]{background:var(--surface-2);border:1px solid rgba(212,164,74,.2);border-radius:20px;padding:2rem 2.5rem;max-width:520px;width:90%;max-height:80vh;overflow-y:auto;box-shadow:0 16px 60px #00000080,0 0 30px #d4a44a0f}.explain-header[data-astro-cid-fvgqvmki]{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.explain-label[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.65rem;letter-spacing:.15em;color:var(--amber)}.explain-tabs[data-astro-cid-fvgqvmki]{display:flex;gap:.4rem;flex-wrap:wrap}.explain-tab[data-astro-cid-fvgqvmki]{background:none;border:none;padding:.4rem .8rem;font-family:var(--font-display);font-size:.65rem;letter-spacing:.15em;color:var(--text-dim);cursor:pointer;border-radius:100px;border:1px solid transparent;transition:color .2s,border-color .2s,background .2s}.explain-tab[data-astro-cid-fvgqvmki]:hover{color:var(--text-secondary)}.explain-tab[data-astro-cid-fvgqvmki].active{color:var(--amber);border-color:#d4a44a40;background:#d4a44a0d}.explain-tab[data-astro-cid-fvgqvmki][data-tab=context].active{color:var(--cyan);border-color:#00e4ff40;background:#00e4ff0d}.explain-context[data-astro-cid-fvgqvmki]{min-height:80px;padding:.5rem 0}.explain-context-title[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:1.1rem;font-weight:600;color:var(--text-primary);margin:0 0 .8rem;letter-spacing:.01em}.explain-context-body[data-astro-cid-fvgqvmki]{font-size:.95rem;line-height:1.7;color:var(--text-secondary)}.explain-context-body[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--text-primary);font-weight:500}.explain-context-body[data-astro-cid-fvgqvmki] em[data-astro-cid-fvgqvmki]{color:var(--cyan);font-style:italic}.explain-context-body[data-astro-cid-fvgqvmki] p[data-astro-cid-fvgqvmki]{margin:0 0 .8rem}.explain-context-body[data-astro-cid-fvgqvmki] p[data-astro-cid-fvgqvmki]:last-child{margin-bottom:0}.explain-close[data-astro-cid-fvgqvmki]{background:none;border:none;color:var(--text-dim);font-size:1.1rem;cursor:pointer;padding:.3rem;transition:color .2s}.explain-close[data-astro-cid-fvgqvmki]:hover{color:var(--text-primary)}.explain-steps[data-astro-cid-fvgqvmki]{min-height:80px}.explain-step{font-size:1.1rem;line-height:1.8;color:var(--text-secondary);padding:.8rem 0;border-bottom:1px solid var(--border-subtle);opacity:0;transform:translateY(10px);animation:explainStepIn .35s cubic-bezier(.22,1,.36,1) forwards;display:flex;align-items:flex-start;gap:.6rem}.explain-step:last-child{border-bottom:none}.explain-step-text{flex:1;min-width:0}.explain-step .math{font-family:var(--font-mono);color:var(--cyan);font-size:1.05rem}.explain-step strong{color:var(--text-primary);font-weight:500}.explain-step-num{display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;background:#d4a44a26;color:var(--amber);border-radius:50%;font-family:var(--font-mono);font-size:.72rem;font-weight:600;flex-shrink:0;margin-top:.15rem}@keyframes explainStepIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.explain-nav[data-astro-cid-fvgqvmki]{display:flex;justify-content:space-between;align-items:center;margin-top:1.5rem;gap:.75rem}.why-page[data-astro-cid-fvgqvmki]{max-width:640px;margin:0 auto;padding:2rem}.why-label[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim);margin-bottom:1.5rem}.why-content[data-astro-cid-fvgqvmki]{font-size:1.2rem;line-height:1.85;color:var(--text-secondary)}.why-content[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--text-primary);font-weight:500}.why-content[data-astro-cid-fvgqvmki] .math[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);color:var(--cyan);font-size:1.15rem;display:block;margin:.5rem 0}.complete-wrap[data-astro-cid-fvgqvmki]{text-align:center;max-width:420px;margin:0 auto;padding:1rem 2rem 3rem}#screen-complete[data-astro-cid-fvgqvmki]{align-items:flex-start;overflow-y:auto;padding-top:4rem}.complete-insignia[data-astro-cid-fvgqvmki]{display:flex;justify-content:center;animation:insigniaBounce .6s var(--ease-pop)}.insignia-video[data-astro-cid-fvgqvmki]{width:160px;height:160px;object-fit:cover;border-radius:50%}@keyframes insigniaBounce{0%{opacity:0;transform:scale(.5) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}.complete-xp-hero[data-astro-cid-fvgqvmki]{display:flex;flex-direction:column;align-items:center}.complete-xp-num[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:3rem;font-weight:700;color:var(--text-primary);line-height:1}.complete-xp-spark[data-astro-cid-fvgqvmki]{color:var(--amber);font-size:1rem;margin-left:.3rem;animation:sparkle 1.5s ease-in-out infinite}@keyframes sparkle{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.3)}}.complete-stats[data-astro-cid-fvgqvmki]{display:flex;justify-content:center;gap:3rem}.complete-stat[data-astro-cid-fvgqvmki]{display:flex;flex-direction:column;align-items:center;gap:.2rem}.complete-stat-value[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:1.5rem;font-weight:600}.complete-stat-label[data-astro-cid-fvgqvmki]{font-size:.65rem;color:var(--text-dim);letter-spacing:.08em;text-transform:uppercase}.promotion-bg-video[data-astro-cid-fvgqvmki]{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.4;filter:brightness(.7) contrast(1.05);pointer-events:none;z-index:0}.promotion-overlay[data-astro-cid-fvgqvmki]{position:absolute;inset:0;background:radial-gradient(ellipse at center,transparent 0%,rgba(15,15,25,.55) 65%,rgba(6,6,12,.95) 100%);pointer-events:none;z-index:1}.promotion-wrap[data-astro-cid-fvgqvmki]{position:relative;z-index:2;max-width:720px;margin:0 auto;padding:4rem 2rem;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1rem}.promotion-label[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.78rem;letter-spacing:.42em;color:var(--amber);text-shadow:0 0 14px rgba(212,164,74,.6);margin-bottom:.6rem}.promotion-insignia-row[data-astro-cid-fvgqvmki]{display:flex;align-items:center;gap:1.6rem;margin:.4rem 0 .8rem}.promo-old[data-astro-cid-fvgqvmki]{display:flex;flex-direction:column;align-items:center;gap:.5rem;opacity:.5}.promo-old-caption[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.7rem;color:var(--text-dim);line-height:1.4}.promo-caption-grade[data-astro-cid-fvgqvmki]{letter-spacing:.1em}.promo-caption-title[data-astro-cid-fvgqvmki]{color:var(--text-secondary)}.promo-arrow[data-astro-cid-fvgqvmki]{font-size:1.5rem;color:var(--amber);opacity:.7;margin:0 .2rem}.promo-new[data-astro-cid-fvgqvmki]{filter:drop-shadow(0 0 24px rgba(212,164,74,.45))}.promotion-title[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:2.4rem;font-weight:700;margin:.4rem 0 0;background:linear-gradient(180deg,#f0d899 0%,var(--amber) 55%,#b8862e 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;filter:drop-shadow(0 0 12px rgba(212,164,74,.3))}.promotion-grade[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.92rem;letter-spacing:.18em;color:var(--amber)}.promotion-posting[data-astro-cid-fvgqvmki]{font-size:.96rem;color:var(--text-secondary);margin:.1rem 0 0}.promotion-flavor[data-astro-cid-fvgqvmki]{font-size:.92rem;color:var(--text-dim);margin:.6rem 0 1.4rem;max-width:520px;line-height:1.55}.anim-entry[data-astro-cid-fvgqvmki]{opacity:0;transform:translateY(24px) scale(.96);animation:celebEntry .6s cubic-bezier(.22,1,.36,1) forwards}.anim-entry-left[data-astro-cid-fvgqvmki]{opacity:0;transform:translate(-30px);animation:celebSlideLeft .5s cubic-bezier(.22,1,.36,1) forwards}.anim-entry-right[data-astro-cid-fvgqvmki]{opacity:0;transform:translate(30px);animation:celebSlideRight .5s cubic-bezier(.22,1,.36,1) forwards}.anim-entry[data-astro-cid-fvgqvmki][data-delay="0"],.anim-entry-left[data-astro-cid-fvgqvmki][data-delay="0"],.anim-entry-right[data-astro-cid-fvgqvmki][data-delay="0"]{animation-delay:.1s}.anim-entry[data-astro-cid-fvgqvmki][data-delay="1"]{animation-delay:.3s}.anim-entry[data-astro-cid-fvgqvmki][data-delay="2"]{animation-delay:.5s}.anim-entry[data-astro-cid-fvgqvmki][data-delay="3"]{animation-delay:.7s}.anim-entry[data-astro-cid-fvgqvmki][data-delay="4"]{animation-delay:.9s}.anim-entry-left[data-astro-cid-fvgqvmki][data-delay="5"],.anim-entry-right[data-astro-cid-fvgqvmki][data-delay="5"]{animation-delay:1.2s}.anim-entry[data-astro-cid-fvgqvmki][data-delay="6"]{animation-delay:1.5s}.anim-entry[data-astro-cid-fvgqvmki][data-delay="7"]{animation-delay:1.8s}@keyframes celebEntry{0%{opacity:0;transform:translateY(24px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes celebSlideLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes celebSlideRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}.xp-glow[data-astro-cid-fvgqvmki]{animation:xpGlow 1.5s ease-in-out}@keyframes xpGlow{0%{text-shadow:0 0 0 transparent}30%{text-shadow:0 0 20px rgba(212,164,74,.6),0 0 40px rgba(212,164,74,.3)}to{text-shadow:0 0 0 transparent}}.complete-wrap[data-astro-cid-fvgqvmki].slide-out{animation:slideOut .5s cubic-bezier(.55,0,1,.45) forwards}@keyframes slideOut{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(-60px)}}.btn-countdown[data-astro-cid-fvgqvmki]{position:relative;overflow:hidden}.btn-countdown[data-astro-cid-fvgqvmki]:after{content:"";position:absolute;bottom:0;left:0;height:3px;background:var(--cyan);animation:countdownBar var(--cd, 8s) linear forwards;border-radius:0 2px 0 0}@keyframes countdownBar{0%{width:100%}to{width:0%}}.leave-modal[data-astro-cid-fvgqvmki]{display:none;position:fixed;inset:0;z-index:200;background:#000000b3;backdrop-filter:blur(8px);align-items:center;justify-content:center}.leave-modal[data-astro-cid-fvgqvmki].open{display:flex}.leave-modal-card[data-astro-cid-fvgqvmki]{background:var(--surface-3);border:1px solid var(--border-default);border-radius:16px;padding:2rem;max-width:360px;width:90%;text-align:center}.term[data-astro-cid-fvgqvmki]{color:var(--cyan);cursor:help;border-bottom:1px dotted rgba(0,228,255,.3);position:relative}.term-popup[data-astro-cid-fvgqvmki]{display:none;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);background:var(--surface-3);border:1px solid rgba(0,228,255,.15);border-radius:10px;padding:.7rem .9rem;width:260px;z-index:50;box-shadow:0 8px 30px #0006;font-style:normal;font-size:.82rem;line-height:1.5;color:var(--text-secondary)}.term-popup[data-astro-cid-fvgqvmki]:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:var(--surface-3)}.term[data-astro-cid-fvgqvmki]:hover .term-popup[data-astro-cid-fvgqvmki],.term[data-astro-cid-fvgqvmki]:focus .term-popup[data-astro-cid-fvgqvmki]{display:block}.term-popup[data-astro-cid-fvgqvmki] strong[data-astro-cid-fvgqvmki]{color:var(--text-primary)}.nci-chat-toggle[data-astro-cid-fvgqvmki]{position:fixed;bottom:calc(6.5rem + env(safe-area-inset-bottom,0px));left:1.5rem;width:48px;height:48px;border-radius:50%;background:var(--surface-3);border:1.5px solid rgba(0,228,255,.2);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:60;transition:border-color .2s,box-shadow .2s,transform .2s}.nci-chat-toggle[data-astro-cid-fvgqvmki]:hover{border-color:#00e4ff80;box-shadow:0 0 16px #00e4ff26;transform:scale(1.05)}.nci-chat-orb[data-astro-cid-fvgqvmki]{position:relative}.nci-chat-core[data-astro-cid-fvgqvmki]{width:12px;height:12px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:nciBreathe 2.5s ease-in-out infinite}@keyframes nciBreathe{0%,to{opacity:1;box-shadow:0 0 10px var(--cyan)}50%{opacity:.4;box-shadow:0 0 4px var(--cyan)}}.nci-chat-panel[data-astro-cid-fvgqvmki]{display:none;position:fixed;bottom:calc(6.5rem + env(safe-area-inset-bottom,0px));left:1.5rem;width:340px;max-height:480px;background:var(--surface-2);border:1px solid rgba(0,228,255,.12);border-radius:16px;box-shadow:0 12px 40px #00000080,0 0 20px #00e4ff0d;z-index:70;flex-direction:column;overflow:hidden}.nci-chat-panel[data-astro-cid-fvgqvmki].open{display:flex}.nci-chat-header[data-astro-cid-fvgqvmki]{padding:.8rem 1rem;border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;gap:.4rem;flex-shrink:0}.nci-chat-title[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:.7rem;color:var(--cyan);letter-spacing:.06em}.nci-chat-sub[data-astro-cid-fvgqvmki]{font-size:.7rem;color:var(--text-dim);flex:1}.nci-chat-close[data-astro-cid-fvgqvmki]{background:none;border:none;color:var(--text-dim);font-size:1rem;cursor:pointer;padding:.2rem}.nci-chat-close[data-astro-cid-fvgqvmki]:hover{color:var(--text-primary)}.nci-chat-messages[data-astro-cid-fvgqvmki]{flex:1;overflow-y:auto;padding:.8rem;display:flex;flex-direction:column;gap:.5rem;scrollbar-width:none;max-height:340px}.nci-chat-messages[data-astro-cid-fvgqvmki]::-webkit-scrollbar{display:none}.nci-msg{font-size:.85rem;line-height:1.5;padding:.55rem .75rem;border-radius:12px;max-width:85%;word-wrap:break-word}.nci-msg-ai{background:#00e4ff0f;border:1px solid rgba(0,228,255,.1);color:var(--text-primary);align-self:flex-start;border-radius:12px 12px 12px 4px}.nci-msg-user{background:var(--surface-3);border:1px solid var(--border-default);color:var(--text-secondary);align-self:flex-end;border-radius:12px 12px 4px}.nci-msg-loading{color:var(--text-dim);font-style:italic;font-size:.78rem}.nci-chat-input-wrap[data-astro-cid-fvgqvmki]{display:flex;gap:.4rem;padding:.6rem .8rem;border-top:1px solid var(--border-subtle);flex-shrink:0}.nci-chat-input[data-astro-cid-fvgqvmki]{flex:1;background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:8px;color:var(--text-primary);font-size:.85rem;padding:.5rem .7rem;outline:none}.nci-chat-input[data-astro-cid-fvgqvmki]:focus{border-color:var(--cyan)}.nci-chat-input[data-astro-cid-fvgqvmki]::placeholder{color:var(--text-dim)}.nci-chat-send[data-astro-cid-fvgqvmki]{background:var(--cyan);border:none;border-radius:8px;color:var(--void);font-size:1rem;font-weight:700;width:36px;cursor:pointer;transition:background .2s}.nci-chat-send[data-astro-cid-fvgqvmki]:hover{background:#00e4ffd9}@media(max-width:480px){.nci-chat-panel[data-astro-cid-fvgqvmki]{width:calc(100vw - 2rem);left:1rem;bottom:1rem}.nci-chat-toggle[data-astro-cid-fvgqvmki]{bottom:1rem;left:1rem;width:42px;height:42px}}.bridge-link[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.78rem;letter-spacing:.04em;color:var(--text-dim);text-decoration:none;transition:color .2s}.bridge-link[data-astro-cid-fvgqvmki]:hover{color:var(--text-secondary)}.btn-narr-listen[data-astro-cid-fvgqvmki]{display:inline-flex;align-items:center;gap:.45rem;padding:.5rem .95rem;background:#00e4ff0d;border:1px solid rgba(0,228,255,.25);border-radius:100px;color:var(--cyan);font-family:var(--font-body);font-size:.85rem;cursor:pointer;transition:background .2s,border-color .2s,box-shadow .2s}.btn-narr-listen[data-astro-cid-fvgqvmki]:hover{background:#00e4ff1f;border-color:var(--cyan);box-shadow:0 0 14px #00e4ff26}.btn-narr-listen[data-astro-cid-fvgqvmki] svg[data-astro-cid-fvgqvmki]{display:block}.btn-narr-listen[data-astro-cid-fvgqvmki].playing{background:#00e4ff2e;border-color:var(--cyan)}.btn-narr-listen[data-astro-cid-fvgqvmki].playing svg[data-astro-cid-fvgqvmki]{animation:listen-pulse 1.4s ease-in-out infinite}@keyframes listen-pulse{0%,to{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.1)}}.calc-trigger{background:#00e4ff0a;border:1.5px solid rgba(0,228,255,.25);color:var(--cyan);flex:0 0 52px;width:52px;min-width:52px;height:52px;box-sizing:border-box;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .2s;padding:0}.calc-trigger svg{width:26px;height:26px;min-width:26px;display:block;flex-shrink:0}.calc-trigger:hover{border-color:var(--cyan);background:#00e4ff1f;box-shadow:0 0 14px #00e4ff2e;transform:translateY(-1px)}.calc-overlay[data-astro-cid-fvgqvmki]{display:none;position:fixed;inset:0;z-index:180;background:#06060c99;backdrop-filter:blur(6px);align-items:center;justify-content:center;animation:explainFadeIn .2s ease}.calc-overlay[data-astro-cid-fvgqvmki].open{display:flex}.calc-panel[data-astro-cid-fvgqvmki]{background:var(--surface-2);border:1px solid rgba(0,228,255,.12);border-radius:16px;padding:1.2rem;width:280px;box-shadow:0 16px 50px #00000080,0 0 20px #00e4ff0d}.calc-header[data-astro-cid-fvgqvmki]{display:flex;justify-content:space-between;align-items:center;margin-bottom:.8rem}.calc-label[data-astro-cid-fvgqvmki]{font-family:var(--font-display);font-size:.55rem;letter-spacing:.15em;color:var(--cyan);opacity:.7}.calc-close[data-astro-cid-fvgqvmki]{background:none;border:none;color:var(--text-dim);font-size:1rem;cursor:pointer;padding:.2rem}.calc-close[data-astro-cid-fvgqvmki]:hover{color:var(--text-primary)}.calc-display[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:1.8rem;color:var(--text-primary);text-align:right;padding:.6rem .8rem;background:var(--surface-1);border-radius:8px;margin-bottom:.8rem;min-height:2.6rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.calc-grid[data-astro-cid-fvgqvmki]{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.calc-btn[data-astro-cid-fvgqvmki]{font-family:var(--font-mono);font-size:1.1rem;padding:.65rem 0;border:none;border-radius:8px;background:var(--surface-3);color:var(--text-primary);cursor:pointer;transition:background .15s,transform .1s}.calc-btn[data-astro-cid-fvgqvmki]:hover{background:#ffffff14}.calc-btn[data-astro-cid-fvgqvmki]:active{transform:scale(.95)}.calc-op[data-astro-cid-fvgqvmki]{color:var(--cyan)}.calc-fn[data-astro-cid-fvgqvmki]{color:var(--mars-bright);font-size:.9rem}.calc-eq[data-astro-cid-fvgqvmki]{background:var(--cyan);color:var(--void);font-weight:700}.calc-eq[data-astro-cid-fvgqvmki]:hover{background:#00e4ffd9}.calc-sci-row[data-astro-cid-fvgqvmki]{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:6px}.calc-sci[data-astro-cid-fvgqvmki]{font-size:.8rem;color:var(--amber);background:#d4a44a14}.calc-use[data-astro-cid-fvgqvmki]{width:100%;margin-top:.6rem;padding:.5rem;border:none;border-radius:8px;background:#00e4ff1a;color:var(--cyan);font-family:var(--font-display);font-size:.75rem;letter-spacing:.06em;cursor:pointer;transition:background .2s}.calc-use[data-astro-cid-fvgqvmki]:hover{background:#00e4ff2e}.xp-fly{position:fixed;z-index:300;font-family:var(--font-display);font-size:2rem;font-weight:800;color:var(--amber);pointer-events:none;text-shadow:0 0 20px rgba(212,164,74,.8),0 0 40px rgba(212,164,74,.4);filter:drop-shadow(0 0 8px rgba(212,164,74,.6))}.xp-fly-big{font-size:2.6rem;font-weight:900;letter-spacing:.02em;text-align:center;color:var(--amber);text-shadow:0 0 12px rgba(255,220,140,1),0 0 30px rgba(212,164,74,.9),0 0 60px rgba(212,164,74,.55),0 2px 0 rgba(0,0,0,.45);filter:drop-shadow(0 4px 12px rgba(212,164,74,.7))}.xp-badge.pulse{animation:xpBadgePulse .8s cubic-bezier(.22,1,.36,1)!important}@keyframes xpBadgePulse{0%{transform:scale(1)}20%{transform:scale(2.2);color:var(--amber);text-shadow:0 0 24px rgba(212,164,74,.9)}50%{transform:scale(1.8)}to{transform:scale(1);text-shadow:none}}.xp-sparks{position:absolute;top:50%;left:50%;pointer-events:none}.xp-spark-particle{position:absolute;width:4px;height:4px;border-radius:50%;background:var(--amber);box-shadow:0 0 6px var(--amber);animation:sparkFly .6s ease-out forwards}@keyframes sparkFly{0%{opacity:1;transform:translate(0) scale(1)}to{opacity:0;transform:var(--spark-dir) scale(0)}}@media(max-width:768px){.narr-split[data-astro-cid-fvgqvmki],.teach-split[data-astro-cid-fvgqvmki],.prob-layout[data-astro-cid-fvgqvmki]{flex-direction:column}.narr-image[data-astro-cid-fvgqvmki],.teach-image[data-astro-cid-fvgqvmki],.prob-scene[data-astro-cid-fvgqvmki]{width:100%;height:180px;flex-shrink:0}.narr-image[data-astro-cid-fvgqvmki]:after,.teach-image[data-astro-cid-fvgqvmki]:after{background:linear-gradient(180deg,transparent 50%,var(--void) 100%)}.prob-scene[data-astro-cid-fvgqvmki]:after{background:linear-gradient(180deg,transparent 40%,var(--void) 100%)}.narr-content[data-astro-cid-fvgqvmki],.teach-content[data-astro-cid-fvgqvmki],.prob-card[data-astro-cid-fvgqvmki]{width:100%;padding:1.5rem 1.2rem;max-width:100%}.narr-text[data-astro-cid-fvgqvmki]{font-size:1rem;line-height:1.7}.prob-question[data-astro-cid-fvgqvmki]{font-size:1.05rem}.teach-title[data-astro-cid-fvgqvmki]{font-size:1.25rem}.teach-body[data-astro-cid-fvgqvmki]{font-size:.95rem}.prob-narrative[data-astro-cid-fvgqvmki]{font-size:.82rem}.lesson-topbar[data-astro-cid-fvgqvmki]{padding:0 .8rem}.xp-badge[data-astro-cid-fvgqvmki]{font-size:.75rem}.complete-wrap[data-astro-cid-fvgqvmki]{padding:1.5rem 1rem}.complete-xp-num[data-astro-cid-fvgqvmki]{font-size:2.2rem}.complete-stats[data-astro-cid-fvgqvmki]{gap:2rem}.drill-num[data-astro-cid-fvgqvmki]{font-size:3rem}.why-page[data-astro-cid-fvgqvmki]{padding:1.5rem 1.2rem}.why-content[data-astro-cid-fvgqvmki]{font-size:1rem}.explain-panel[data-astro-cid-fvgqvmki]{padding:1.5rem}.calc-panel[data-astro-cid-fvgqvmki]{width:260px}.narr-action[data-astro-cid-fvgqvmki]{margin-top:1.5rem}}@media(max-width:480px){.narr-image[data-astro-cid-fvgqvmki],.teach-image[data-astro-cid-fvgqvmki],.prob-scene[data-astro-cid-fvgqvmki]{height:140px}.narr-content[data-astro-cid-fvgqvmki],.teach-content[data-astro-cid-fvgqvmki],.prob-card[data-astro-cid-fvgqvmki]{padding:1.2rem 1rem}.narr-text[data-astro-cid-fvgqvmki]{font-size:.92rem}.teach-visual[data-astro-cid-fvgqvmki]{font-size:.72rem;padding:.8rem}.prob-card[data-astro-cid-fvgqvmki] .answer-input[data-astro-cid-fvgqvmki]{font-size:1.2rem;padding:.75rem}.prob-card[data-astro-cid-fvgqvmki] .choice-pill[data-astro-cid-fvgqvmki]{font-size:.95rem;padding:.55rem 1rem}.complete-insignia[data-astro-cid-fvgqvmki] .insignia-video[data-astro-cid-fvgqvmki]{width:100px;height:100px}}.solver-wrap{display:flex;flex-direction:column;gap:1.25rem;width:100%}.solver-equations{display:flex;flex-direction:column;gap:.6rem;padding:1rem 1.25rem;background:#ffffff05;border:1px solid rgba(255,255,255,.06);border-radius:10px}.solver-row{display:grid;grid-template-columns:1fr auto;align-items:center;gap:.85rem;padding:.55rem .4rem;border-radius:6px;transition:opacity .25s,background .2s}.solver-row.pending{opacity:.35}.solver-row.solved{background:#34d3990d}.solver-label{font-size:.78rem;color:var(--text-dim);font-family:var(--font-display)}.solver-equation{font-family:JetBrains Mono,monospace;font-size:1.25rem;font-weight:500;color:var(--text-primary);text-align:right;white-space:nowrap}.solver-blank{display:inline-block;min-width:2.4em;height:1.6em;line-height:1.6em;margin:0 .15em;padding:0 .4em;text-align:center;border:1.5px dashed rgba(0,228,255,.45);border-radius:6px;background:#00e4ff0f;color:var(--cyan);font-weight:600;vertical-align:middle;transition:all .15s}.solver-blank.hover{background:#00e4ff2e;border-color:var(--cyan);transform:scale(1.05)}.solver-blank.filled{border-style:solid;border-color:#34d39999;background:#34d3991f;color:var(--success)}.solver-blank.shake{animation:solverShake .45s ease-in-out}@keyframes solverShake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.solver-tray{display:flex;flex-wrap:wrap;justify-content:center;gap:.6rem;padding:.85rem;background:#ffffff08;border:1px solid rgba(255,255,255,.05);border-radius:10px;min-height:60px;align-items:center}.solver-tile{font-family:JetBrains Mono,monospace;font-size:1.1rem;font-weight:600;color:var(--text-primary);background:var(--surface-2);border:1.5px solid rgba(255,255,255,.12);border-radius:8px;padding:.55rem .95rem;min-width:3em;cursor:grab;user-select:none;transition:all .15s}.solver-tile:hover{border-color:var(--cyan);background:#00e4ff0f;transform:translateY(-2px);box-shadow:0 4px 14px #00e4ff2e}.solver-tile.dragging{opacity:.4;cursor:grabbing}.solver-tile.wrong{border-color:#ef4444b3;background:#ef44441a;animation:solverShake .45s ease-in-out}.solver-done{font-family:var(--font-display);font-size:.95rem;color:var(--success);text-align:center;width:100%}.solver-done strong{color:var(--text-primary)}@media(max-width:540px){.solver-equation{font-size:1.05rem}.solver-blank{min-width:2em}.solver-tile{font-size:.95rem;padding:.45rem .75rem}}