.counting-compare{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;margin:20px 0;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--card-bg)}.counting-compare__group{display:flex;flex-direction:column;align-items:center;gap:8px}.counting-compare__digit{font-family:var(--mono);font-size:1.25rem;font-weight:700}.counting-compare__word{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--soft-ink)}.counting-pattern-board{margin:20px 0;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card-bg)}.counting-pattern-ladder{display:flex;flex-wrap:wrap;gap:14px 18px;margin:0;padding:0;list-style:none}.counting-pattern-step{display:flex;flex-direction:column;align-items:center;gap:8px;min-width:56px;padding:10px 8px;border-radius:8px;background:rgba(20,184,166,.06)}.counting-pattern-step__digit{font-family:var(--mono);font-size:1.1rem;font-weight:700;color:var(--ink)}.counting-pattern-board__caption{margin:14px 0 0;font-size:.9rem;color:var(--soft-ink);text-align:center}.counting-shape-pattern{margin:20px 0;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card-bg)}.counting-shape-pattern__strip{display:flex;flex-wrap:wrap;justify-content:center;gap:12px 16px;margin:0;padding:0;list-style:none}.counting-shape-pattern__strip>li{display:flex;flex-direction:column;align-items:center;gap:6px}.counting-shape{display:block;width:36px;height:36px}.counting-shape--circle{border-radius:50%;background:rgba(59,130,246,.45);border:2px solid rgba(37,99,235,.5)}.counting-shape--square{border-radius:4px;background:rgba(234,179,8,.45);border:2px solid rgba(180,83,9,.45)}.counting-shape--question{display:flex;align-items:center;justify-content:center;border-radius:8px;border:2px dashed var(--line);font-family:var(--mono);font-size:1.25rem;font-weight:700;color:var(--muted);background:rgba(0,0,0,0)}.counting-shape-pattern__label{font-size:.72rem;color:var(--soft-ink);text-transform:lowercase}.counting-shape-pattern__next .counting-shape-pattern__label{font-weight:600;color:var(--accent)}.counting-demo__objects{display:flex;flex-wrap:wrap;gap:10px;min-height:88px;padding:16px;border:1px dashed var(--line);border-radius:10px;background:var(--card-bg)}.counting-demo__object{width:40px;height:40px;border:none;border-radius:50%;background:rgba(20,184,166,.35);cursor:pointer;transition:transform .12s ease,background .12s ease}.counting-demo__object:hover{transform:scale(1.06);background:rgba(20,184,166,.55)}.counting-demo__object--active{background:rgba(15,118,110,.75)}.counting-demo__count{font-family:var(--mono);font-size:2rem;font-weight:700;color:var(--ink)}.addition-groups__piles{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:center;gap:20px}.addition-groups__pile{display:flex;flex-direction:column;align-items:center;gap:8px}.addition-groups__dots{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;width:140px;min-height:100px;padding:10px;border-radius:8px;background:rgba(59,130,246,.08)}.addition-groups__pile--b .addition-groups__dots{background:rgba(154,107,46,.12)}.addition-groups__dot{width:14px;height:14px;border-radius:50%;background:var(--ink)}.addition-groups__plus,.addition-groups__equals{font-family:var(--mono);font-size:1.5rem;font-weight:700;color:var(--soft-ink)}.addition-groups__total-dots{display:flex;flex-wrap:wrap;gap:5px;justify-content:center;max-width:320px;min-height:48px;margin-top:12px}@media(max-width: 640px){.addition-groups__piles{gap:12px}.addition-groups__pile{gap:6px}.addition-groups__dots{width:96px;min-height:78px;padding:8px;gap:4px}.addition-groups__dot{width:10px;height:10px}.addition-groups__plus,.addition-groups__equals{font-size:1.2rem}}.multiplication-array__grid{display:grid;gap:6px;width:fit-content;margin:0 auto;padding:12px;border-radius:10px;background:var(--card-bg);border:1px solid var(--line)}.multiplication-array__cell{width:22px;height:22px;border-radius:50%;background:rgba(20,184,166,.45)}.counting-place-ladder{margin:20px 0;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--card-bg)}.counting-place-ladder__steps{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px 16px;margin:0;padding:0;list-style:none}.counting-place-step{display:flex;flex-direction:column;align-items:center;gap:8px}.counting-place-step--arrow{font-family:var(--mono);font-size:.9rem;font-weight:700;color:var(--soft-ink)}.counting-place-step__label{font-size:.8rem;font-weight:600;color:var(--soft-ink)}.counting-place-blocks__rod{display:block;width:14px;height:72px;border-radius:4px;background:linear-gradient(180deg, #14b8a6 0%, #0f766e 100%)}.counting-place-blocks__grid{display:block;width:72px;height:72px;border-radius:6px;background:repeating-linear-gradient(90deg, rgba(15, 118, 110, 0.35) 0, rgba(15, 118, 110, 0.35) 6px, transparent 6px, transparent 12px),repeating-linear-gradient(rgba(15, 118, 110, 0.35) 0, rgba(15, 118, 110, 0.35) 6px, transparent 6px, transparent 12px);border:2px solid rgba(15,118,110,.5)}.counting-big-table td:first-child{font-weight:600}.division-sharing__equation{margin:12px 0;font-family:var(--mono);font-size:1.05rem;text-align:center}.division-sharing__piles{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}.division-sharing__pile{display:flex;flex-direction:column;align-items:center;gap:6px}.division-sharing__pile-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--soft-ink)}.division-sharing__dots{display:flex;flex-wrap:wrap;gap:5px;justify-content:center;width:88px;min-height:72px;padding:8px;border-radius:8px;background:rgba(59,130,246,.08)}.division-sharing__dot{width:12px;height:12px;border-radius:50%;background:var(--ink)}.division-sharing__dot--extra{background:#c2410c}.division-sharing__dots--remainder{background:rgba(234,88,12,.1);border:1px dashed rgba(180,83,9,.45)}.division-sharing__uneven{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:center;gap:16px}.division-sharing__remainder{display:flex;flex-direction:column;align-items:center;gap:6px}.book-prose .math-widget-mount:has(.big-numbers-scale){max-width:none}.big-numbers-scale{--big-scale-canvas-bg: var(--paper);--big-scale-grid: color-mix(in srgb, var(--line) 70%, transparent);--big-scale-star: color-mix(in srgb, var(--soft-ink) 48%, transparent);width:min(1320px,96vw);max-width:none}[data-theme=dark] .big-numbers-scale,:root:not([data-theme=light]) .big-numbers-scale{--big-scale-canvas-bg: color-mix(in srgb, var(--card-bg) 90%, black);--big-scale-grid: color-mix(in srgb, var(--line) 78%, rgba(148, 163, 184, 0.2));--big-scale-star: color-mix(in srgb, var(--soft-ink) 62%, rgba(255, 255, 255, 0.18))}.big-numbers-scale__layout{display:grid;gap:14px}.big-numbers-scale__canvas-panel,.big-numbers-scale__controls,.big-numbers-scale__section{min-width:0}.big-numbers-scale__canvas-panel{border:1px solid var(--line);border-radius:12px;background:var(--paper);overflow:hidden}.big-numbers-scale__toolbar,.big-numbers-scale__slider-wrap{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line)}.big-numbers-scale__slider-wrap{border-top:1px solid var(--line);border-bottom:0;flex-direction:column;align-items:stretch}.big-numbers-scale__slider-meta{display:flex;justify-content:space-between;font-family:var(--mono);font-size:.75rem;color:var(--soft-ink)}.big-numbers-scale__slider{width:100%}.big-numbers-scale__tool-btn,.big-numbers-scale__autoplay-btn,.speed-btn,.preset-step-btn{border:1px solid var(--line);border-radius:8px;background:var(--card-bg);color:var(--ink);font-family:var(--mono);cursor:pointer}.big-numbers-scale__tool-btn,.big-numbers-scale__autoplay-btn{padding:7px 10px;font-size:.76rem}.big-numbers-scale__autoplay-btn{border-color:rgba(20,184,166,.45);background:rgba(20,184,166,.15);font-weight:700}.big-numbers-scale__autoplay-btn--pause{border-color:rgba(234,88,12,.45);background:rgba(234,88,12,.16)}.big-numbers-scale__badge{padding:3px 7px;border-radius:999px;border:1px solid var(--line);font-family:var(--mono);font-size:.72rem;color:var(--soft-ink)}.big-numbers-scale__hud{display:grid;grid-template-columns:1fr;gap:8px;padding:10px 12px}.big-numbers-scale__hud-card{padding:8px;border:1px solid var(--line);border-radius:10px;background:color-mix(in srgb, var(--card-bg) 84%, #0b1220)}.big-numbers-scale__hud-card--right{text-align:right}.big-numbers-scale__hud-label{display:block;font-size:.7rem;color:var(--soft-ink)}.big-numbers-scale__hud-value{display:block;margin-top:2px;font-family:var(--mono);font-size:1.35rem;font-weight:700}.big-numbers-scale__hud-value--small{font-size:1.05rem}.big-numbers-scale__hud-sub{display:block;margin-top:2px;font-size:.72rem;color:var(--soft-ink)}.big-numbers-scale__tier-badge{display:inline-block;margin-top:4px;padding:2px 6px;border-radius:6px;font-size:.66rem;font-family:var(--mono);font-weight:700;color:#08111f;background:#14b8a6}.big-numbers-scale__tier-badge--green{background:#14b8a6}.big-numbers-scale__tier-badge--purple{background:#8b5cf6}.big-numbers-scale__tier-badge--orange{background:#f97316}.big-numbers-scale__tier-badge--yellow{background:#f59e0b}.big-numbers-scale__tier-badge--cyan{background:#06b6d4}.big-numbers-scale__canvas-wrap{position:relative;height:400px;background:var(--big-scale-canvas-bg)}.big-numbers-scale__canvas{width:100%;height:100%;display:block}.big-numbers-scale__status{position:absolute;left:12px;bottom:12px;padding:6px 10px;border-radius:8px;background:rgba(2,6,23,.85);border:1px solid var(--line);color:var(--soft-ink);font-size:.74rem;opacity:0;transform:translateY(5px);transition:opacity 160ms ease,transform 160ms ease}.big-numbers-scale__status--visible{opacity:1;transform:translateY(0)}.big-numbers-scale__controls{display:grid;gap:10px}.big-numbers-scale__controls-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:2.1rem;padding:7px 9px}.big-numbers-scale__controls-dialog{margin:auto;padding:0;border:0;background:rgba(0,0,0,0);color:inherit}.big-numbers-scale__controls-dialog__sheet{width:100%}.big-numbers-scale__controls-dialog__header{display:none}.big-numbers-scale__controls-dialog__title{margin:0;font-size:.9rem;color:var(--soft-ink)}.big-numbers-scale__section{border:1px solid var(--line);border-radius:10px;background:var(--card-bg);padding:10px}.big-numbers-scale__section-title{margin:0 0 8px;font-size:.82rem;color:var(--soft-ink)}.big-numbers-scale__preset-grid{display:grid;grid-template-columns:repeat(2, minmax(0, 1fr));gap:6px}.preset-step-btn{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:7px;min-height:58px}.preset-step-btn__power{font-size:.65rem;color:var(--soft-ink);font-family:var(--mono)}.preset-step-btn__label{font-size:.78rem;font-weight:700}.preset-step-btn--active{border-color:rgba(20,184,166,.55);background:rgba(20,184,166,.15)}.big-numbers-scale__speed-grid{display:grid;grid-template-columns:repeat(3, minmax(0, 1fr));gap:6px}.speed-btn{padding:6px 8px;font-size:.75rem}.speed-btn--active{border-color:rgba(20,184,166,.55);background:rgba(20,184,166,.18);font-weight:700}.big-numbers-scale__nav-row{display:grid;grid-template-columns:repeat(3, minmax(0, 1fr));gap:6px;margin-top:8px}.big-numbers-scale__stat-text,.big-numbers-scale__analogy{margin:0;font-size:.78rem;color:var(--soft-ink)}.big-numbers-scale__stat-value{margin:8px 0;padding:8px;border-radius:8px;border:1px solid var(--line);font-family:var(--mono);font-weight:700}@media(min-width: 960px){.big-numbers-scale__layout{grid-template-columns:minmax(0, 3fr) minmax(280px, 2fr)}.big-numbers-scale__hud{grid-template-columns:repeat(2, minmax(0, 1fr))}.big-numbers-scale__controls-toggle{display:none}.big-numbers-scale__controls-dialog{display:block;position:static;width:auto;max-width:none;min-width:0;margin:0;background:rgba(0,0,0,0);border:0}.big-numbers-scale__controls-dialog__sheet{padding:0;border:0;background:rgba(0,0,0,0);box-shadow:none}}@media(max-width: 959px){.big-numbers-scale__layout{grid-template-columns:1fr}.big-numbers-scale__controls-dialog{width:min(92vw,420px);max-width:none;margin:auto;border:0}.big-numbers-scale__controls-dialog__sheet{padding:18px 18px 14px;opacity:0;transform:translateY(12px);transition:opacity 200ms ease,transform 200ms ease}.big-numbers-scale__controls-dialog[open] .big-numbers-scale__controls-dialog__sheet{opacity:1;transform:translateY(0)}.big-numbers-scale__controls-dialog__header{display:flex;align-items:center;justify-content:space-between;margin:0 0 8px;padding-bottom:8px;border-bottom:1px solid var(--line)}.big-numbers-scale__controls{max-height:70vh;overflow:auto;padding-right:2px}}