.soroban-module{--bg: #f6f4f1;--card: #ffffff;--ink: #241f1b;--muted: #6b6157;--line: #e4ded6;--rod: #c4bcb1;--bar: #4a3f35;--accent: #b0552f;--accent-soft: #ecccbd;--heaven: #2f6d8f;--heaven-soft: #bcd6e2;--hl: #e0902a;--lm-a: #c2603a;--lm-b: #2f6d8f;--dot: #241f1b;--focus: #1b74e4;--hiw-up: #b0552f;--hiw-down: #2f6d8f;--hiw-lit: #b25c00;--hiw-cross: #241f1b;--hiw-fieldbg: #e0902a;--hiw-good: #256b3b;--hiw-go: #256b3b;--hiw-go-ink: #ffffff;--hiw-glow: #b25c00;max-width:900px;margin:0 auto;color:var(--ink);font:16px/1.55 system-ui,sans-serif}.dark .soroban-module,.soroban-module[data-theme=dark]{--bg: #17130f;--card: #211b16;--ink: #ece6df;--muted: #a99e92;--line: #352c24;--rod: #52453a;--bar: #b3a696;--accent: #e07a4f;--accent-soft: #5a3a2c;--heaven: #5aa6ca;--heaven-soft: #24404e;--hl: #f0b64d;--dot: #ece6df;--focus: #6ea8ff;--hiw-up: #e07a4f;--hiw-down: #6fb0cf;--hiw-lit: #f0b429;--hiw-cross: #ece6df;--hiw-fieldbg: #f0b429;--hiw-good: #6bbf7f;--hiw-go: #58b06f;--hiw-go-ink: #10160e;--hiw-glow: #f0b64d}.soroban-module[data-theme=light]{--bg: #f6f4f1;--card: #ffffff;--ink: #241f1b;--muted: #6b6157;--line: #e4ded6;--rod: #c4bcb1;--bar: #4a3f35;--accent: #b0552f;--accent-soft: #ecccbd;--heaven: #2f6d8f;--heaven-soft: #bcd6e2;--hl: #e0902a;--dot: #241f1b;--focus: #1b74e4;--hiw-up: #b0552f;--hiw-down: #2f6d8f;--hiw-lit: #b25c00;--hiw-cross: #241f1b;--hiw-fieldbg: #e0902a;--hiw-good: #256b3b;--hiw-go: #256b3b;--hiw-go-ink: #ffffff;--hiw-glow: #b25c00}.soroban-module .tabs{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 20px;border-bottom:1px solid var(--line)}.soroban-module [role=tab]{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;background:none;color:var(--muted);font:inherit;font-weight:600;cursor:pointer;padding:10px 14px;min-height:48px;border-radius:10px 10px 0 0;border-bottom:2px solid transparent}.soroban-module [role=tab][aria-selected=true]{color:var(--accent);border-bottom-color:var(--accent)}.soroban-module [role=tab]:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.soroban-module .card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:20px}.soroban-module .card h2{font-size:1.2rem;margin:0 0 4px}.soroban-module .card .hint{color:var(--muted);font-size:.92rem;margin:6px 0 16px}.soroban-module [hidden]{display:none}.soroban-module .soroban-svg,.soroban-module .lm-svg{width:100%;height:auto;display:block;touch-action:manipulation}.soroban-module .soroban-svg{max-height:420px}.soroban-module .bar{stroke:var(--bar);stroke-width:4;stroke-linecap:round}.soroban-module .rod{stroke:var(--rod);stroke-width:3}.soroban-module .rod-carry{stroke:var(--hiw-glow);stroke-width:6;filter:drop-shadow(0 0 5px var(--hiw-glow))}.soroban-module .counting .bead{transition:cx .42s cubic-bezier(.34,1.25,.5,1),cy .42s cubic-bezier(.34,1.25,.5,1),fill .16s ease,opacity .16s ease}.soroban-module .bead{stroke:#00000047;stroke-width:1.5;outline:none;transition:cx .16s ease,cy .16s ease,fill .16s ease,opacity .16s ease}.soroban-module [role=button].bead{cursor:pointer}.soroban-module .bead.earth.on{fill:var(--accent)}.soroban-module .bead.earth.off{fill:var(--accent-soft);opacity:.72}.soroban-module .bead.heaven.on{fill:var(--heaven)}.soroban-module .bead.heaven.off{fill:var(--heaven-soft);opacity:.72}.soroban-module .bead.hl{stroke:var(--hl);stroke-width:4}.soroban-module .bead:focus-visible{stroke:var(--focus);stroke-width:3}@media (prefers-reduced-motion: reduce){.soroban-module .bead{transition:none}}.soroban-module .row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.soroban-module .spacer{flex:1}.soroban-module .value{font-size:2rem;font-weight:700;font-variant-numeric:tabular-nums}.soroban-module .controls{margin-top:14px}.soroban-module button,.soroban-module input{font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px}.soroban-module button{cursor:pointer;min-height:48px;min-width:48px}.soroban-module button:focus-visible,.soroban-module input:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.soroban-module button[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}.soroban-module button.primary{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600}.soroban-module button.hiw-audio[aria-pressed=true]{background:var(--accent-soft);color:var(--ink);border-color:var(--accent)}.dark .soroban-module button[aria-pressed=true],.dark .soroban-module button.primary{color:#241f1b}.dark .soroban-module button.hiw-audio[aria-pressed=true]{color:var(--ink)}.soroban-module button:disabled{opacity:.45;cursor:not-allowed}.soroban-module .size-btn{min-width:48px}.soroban-module input[type=number]{width:8ch;text-align:right;font-variant-numeric:tabular-nums}.soroban-module label,.soroban-module .label{color:var(--muted);font-size:.92rem}.soroban-module .decomp{margin-top:14px;font-size:1.1rem;display:flex;flex-wrap:wrap;gap:6px;align-items:baseline}.soroban-module .pv{display:inline-flex;flex-direction:column;align-items:center;padding:4px 8px;border:1px solid var(--line);border-radius:8px}.soroban-module .pv b{font-size:1.3rem;font-variant-numeric:tabular-nums}.soroban-module .pv small{color:var(--muted)}.soroban-module .plus,.soroban-module .eq{color:var(--muted);font-weight:600;align-self:center}.soroban-module .eq{color:var(--ink);font-variant-numeric:tabular-nums}.soroban-module .caption{min-height:1.5em;font-size:1.05rem;margin:12px 0 4px}.soroban-module .result{color:var(--accent);font-weight:700;font-variant-numeric:tabular-nums}.soroban-module .error{color:#b3261e;font-weight:600}.dark .soroban-module .error,.soroban-module[data-theme=dark] .error{color:#ff8a80}.soroban-module .lm-a{stroke:var(--lm-a);stroke-width:2.5;stroke-linecap:round}.soroban-module .lm-b{stroke:var(--lm-b);stroke-width:2.5;stroke-linecap:round}.soroban-module .lm-dot{fill:var(--dot)}.soroban-module .lm-svg{max-height:360px;background:var(--bg);border-radius:10px}.soroban-module .product{font-size:1.6rem;font-weight:700;margin-top:10px;font-variant-numeric:tabular-nums}.soroban-module .lm-note{color:var(--muted);font-size:.9rem}.soroban-module .sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.soroban-module .hiw-grid{display:flex;flex-wrap:wrap;gap:16px;margin-top:12px}.soroban-module .hiw-example{flex:1 1 260px;min-width:0;margin:0;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}.soroban-module .hiw-example h3{font-size:1.05rem;margin:0 0 10px}.soroban-module .hiw-section{margin:26px 0 0;padding-top:18px;border-top:1px solid var(--line)}.soroban-module .hiw-section:first-of-type{margin-top:0;padding-top:0;border-top:0}.soroban-module .hiw-section>h3{font-size:1.1rem;margin:0 0 8px}.soroban-module .hiw-section>p{margin:0 0 12px}.soroban-module .hiw-method{margin-top:16px}.soroban-module .hiw-method>h4{font-size:1rem;margin:0 0 6px;color:var(--accent)}.soroban-module .hiw-stepper{flex:1 1 280px;min-width:0;margin:0;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}.soroban-module .hiw-stepper-title{font-size:1.02rem;font-weight:700;margin:0 0 8px}.soroban-module .hiw-frame{min-height:40px}.soroban-module .hiw-controls{margin-top:12px;gap:8px}.soroban-module .hiw-controls button{min-height:44px;min-width:44px;padding:8px 12px}.soroban-module .hiw-speed{display:inline-flex;align-items:center;gap:6px}.soroban-module .hiw-speed select{min-height:44px;padding:8px 10px;font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:10px}.soroban-module .hiw-speed select:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.soroban-module .lm-dot{transition:opacity .18s ease}.soroban-module .lm-dot-current{fill:var(--hl);stroke:var(--bar);stroke-width:1.5}.soroban-module .hiw-eyebrow{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--accent);margin:0 0 4px}.soroban-module .hiw-overview .soroban-svg{max-width:160px;margin:10px auto;display:block}.soroban-module .hiw-build{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.soroban-module .hiw-build li{display:flex;gap:10px;align-items:baseline}.soroban-module .hiw-dot{flex:0 0 auto;width:9px;height:9px;border-radius:50%;background:var(--accent);margin-top:7px}.soroban-module .hiw-lede-strong{margin:18px 0 4px;font-weight:700}.soroban-module .hiw-path{list-style:none;counter-reset:hiwstep;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.soroban-module .hiw-path li{counter-increment:hiwstep;display:flex;gap:10px;align-items:baseline}.soroban-module .hiw-path li:before{content:counter(hiwstep);flex:0 0 auto;width:1.7rem;height:1.7rem;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:grid;place-items:center;font-size:.92rem}.dark .soroban-module .hiw-path li:before{color:#241f1b}.soroban-module .hiw-levels{display:inline-flex;gap:4px;background:var(--bg);border:1px solid var(--line);padding:4px;border-radius:999px;margin:8px 0 12px}.soroban-module .hiw-levels button{border-radius:999px;padding:8px 16px;min-height:40px}.soroban-module .hiw-example-tag{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700;color:var(--accent);margin:0 0 8px}.soroban-module .hiw-practice{margin-top:20px;padding-top:16px;border-top:1px dashed var(--line)}.soroban-module .hiw-audio{display:inline-flex;align-items:center;gap:8px;margin-top:14px;background:var(--accent-soft);color:var(--ink);border:1px solid var(--accent);font:inherit;font-weight:700;font-size:.95rem;padding:10px 18px;border-radius:999px;cursor:pointer;min-height:44px}.soroban-module .hiw-audio:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.soroban-module .hiw-section>.hint{color:var(--muted);font-size:.95rem;margin:0 0 14px;text-align:center}.soroban-module .hiw-modes{display:inline-flex;gap:6px;justify-content:center;margin:0 auto 14px;background:var(--bg);border:1px solid var(--line);padding:4px;border-radius:999px;width:-moz-fit-content;width:fit-content}.soroban-module .hiw-modes button,.soroban-module .hiw-op button{background:transparent;color:var(--muted);border-color:transparent;font-weight:700}.soroban-module .hiw-modes button{border-radius:999px;padding:8px 18px;min-height:44px}.soroban-module .hiw-modes button[aria-pressed=true],.soroban-module .hiw-op button[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}.dark .soroban-module .hiw-modes button[aria-pressed=true],.dark .soroban-module .hiw-op button[aria-pressed=true]{color:#241f1b}.soroban-module .hiw-count-readout{display:flex;flex-direction:column;align-items:center;gap:2px;margin:4px 0 10px}.soroban-module .hiw-count-num{font-size:clamp(2.6rem,11vw,4rem);font-weight:800;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums;animation:hiw-pop .5s ease}.soroban-module .hiw-count-word{font-size:clamp(1rem,4vw,1.3rem);font-weight:700}@keyframes hiw-pop{0%{transform:scale(1)}30%{transform:scale(1.32)}to{transform:scale(1)}}.soroban-module .hiw-count-board{max-width:300px;margin:0 auto}.soroban-module .hiw-count-board .soroban-svg{max-height:300px}.soroban-module .hiw-say{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:12px;padding:14px 16px;margin:14px 0;font-size:1.05rem;line-height:1.5;min-height:3.2em}.soroban-module .hiw-say b{color:var(--accent)}.soroban-module .hiw-carrymsg{color:var(--hiw-good);font-weight:700}.soroban-module .hiw-count-ctl{display:flex;flex-direction:column;gap:10px;align-items:center}.soroban-module .hiw-count-ctl .row,.soroban-module .hiw-task-row{justify-content:center}.soroban-module .hiw-big{font-size:1.5rem;font-weight:800;min-width:84px;min-height:60px;background:var(--accent);color:#fff;border-color:var(--accent)}.dark .soroban-module .hiw-big{color:#241f1b}.soroban-module .hiw-big.hiw-minus{background:var(--card);color:var(--accent)}.dark .soroban-module .hiw-big.hiw-minus{color:var(--accent)}.soroban-module .hiw-step{font-size:1.05rem;font-weight:700;min-height:52px}.soroban-module .hiw-util{color:var(--muted);background:transparent}.soroban-module .hiw-task-ctl{display:flex;flex-direction:column;gap:12px;align-items:center}.soroban-module .hiw-task-help{max-width:34rem}.soroban-module .hiw-numin{width:5ch;font-size:1.6rem;font-weight:800;text-align:center;padding:8px}.soroban-module .hiw-op{display:inline-flex;gap:4px;background:var(--bg);border:1px solid var(--line);padding:4px;border-radius:12px}.soroban-module .hiw-op button{font-size:1.5rem;font-weight:800;width:52px;height:52px;min-width:52px;border-radius:10px;padding:0}.soroban-module .hiw-mal,.soroban-module .hiw-eqsign{font-size:1.6rem;font-weight:800;color:var(--muted)}.soroban-module .hiw-eqval{font-size:1.6rem;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;min-width:2ch;text-align:center}.soroban-module .hiw-go{font-size:1.3rem;font-weight:800;min-height:58px;padding:10px 28px;background:var(--hiw-go);color:var(--hiw-go-ink);border-color:var(--hiw-go)}.soroban-module .hiw-count-voice{justify-content:center;margin-top:14px}.soroban-module .hiw-legend{margin-top:16px;font-size:.95rem;color:var(--muted);text-align:center;line-height:1.6}.soroban-module .hiw-legend b{color:var(--ink)}.soroban-module .hiw-quick{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:10px}.soroban-module .hiw-quick-btn{color:var(--accent);border-color:var(--accent);background:transparent;font-weight:700;min-height:46px}.soroban-module .hiw-linemult .hiw-go{display:block;margin:10px auto 0}.soroban-module .hiw-lm-stage{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin-top:14px}.soroban-module .hiw-lm-svg{width:100%;height:auto;display:block;max-height:360px}.soroban-module .hiw-lm-up{stroke:var(--hiw-up);stroke-width:3.2;stroke-linecap:round;fill:none}.soroban-module .hiw-lm-down{stroke:var(--hiw-down);stroke-width:3.2;stroke-linecap:round;fill:none}.soroban-module .hiw-grow{transition:stroke-dashoffset .7s ease}.soroban-module .hiw-fieldbox{fill:var(--hiw-fieldbg);opacity:0;transition:opacity .4s ease}.soroban-module .hiw-fieldbox.on{opacity:.14}.soroban-module .hiw-dot{fill:var(--hiw-cross);opacity:0;transform-box:fill-box;transform-origin:center;transform:scale(.1);transition:opacity .3s ease,transform .3s cubic-bezier(.34,1.4,.5,1)}.soroban-module .hiw-dot.show{opacity:.55;transform:scale(1)}.soroban-module .hiw-dot.lit{fill:var(--hiw-lit);stroke:var(--bar);stroke-width:1.5;opacity:1;transform:scale(1.35)}.soroban-module .hiw-linemult .hiw-legend .hiw-up{color:var(--hiw-up);font-weight:700}.soroban-module .hiw-linemult .hiw-legend .hiw-down{color:var(--hiw-down);font-weight:700}@media (prefers-reduced-motion: reduce){.soroban-module .lm-dot,.soroban-module .counting .bead{transition:none}.soroban-module .hiw-count-num{animation:none}.soroban-module .hiw-grow,.soroban-module .hiw-dot,.soroban-module .hiw-fieldbox{transition:none}}