:root{--bg:#f1f0eb;--paper:#fbfaf6;--text:#202d45;--blue:#2457ff;--guide:#b7bbc5;--font-display:"Inter Tight", "Noto Sans JP", sans-serif;--font-body:"Noto Sans JP", "Inter Tight", sans-serif;--font-mono:"IBM Plex Mono", monospace}[data-astro-cid-s244gf7m]{box-sizing:border-box}[data-astro-cid-s244gf7m][hidden]{display:none!important}body{background:var(--bg);color:var(--text);font-family:var(--font-body);margin:0}.page[data-astro-cid-s244gf7m]{width:min(1500px,100%);margin:auto;padding:0 28px}.tool-head[data-astro-cid-s244gf7m]{border-bottom:1px solid var(--text);padding:24px 0 48px}.meta[data-astro-cid-s244gf7m]{grid-template-columns:1fr 1fr auto;gap:16px;display:grid}.meta[data-astro-cid-s244gf7m],.label[data-astro-cid-s244gf7m],footer[data-astro-cid-s244gf7m]{font-family:var(--font-mono);letter-spacing:.04em;font-size:11px}.meta[data-astro-cid-s244gf7m] i[data-astro-cid-s244gf7m]{color:var(--blue);font-style:normal}.heading[data-astro-cid-s244gf7m]{margin-top:76px}.eyebrow[data-astro-cid-s244gf7m]{font-size:14px;font-weight:700}h1[data-astro-cid-s244gf7m]{font-family:var(--font-display);letter-spacing:-.06em;margin:0;font-size:clamp(40px,8vw,120px);line-height:1.2}h2[data-astro-cid-s244gf7m]{font-size:clamp(22px,3vw,36px);line-height:1.4}.practice[data-astro-cid-s244gf7m]{max-width:760px;margin:auto;padding:36px 0 60px}.modes[data-astro-cid-s244gf7m],.actions[data-astro-cid-s244gf7m],.choices[data-astro-cid-s244gf7m]{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:24px;display:grid}button[data-astro-cid-s244gf7m],.choices[data-astro-cid-s244gf7m] button{border:1px solid var(--guide);background:var(--paper);min-width:0;min-height:52px;color:var(--text);font:inherit;overflow-wrap:anywhere;cursor:pointer;padding:12px 16px}button[data-astro-cid-s244gf7m]:hover,.choices[data-astro-cid-s244gf7m] button:hover{border-color:var(--blue)}button[data-astro-cid-s244gf7m]:focus-visible,a[data-astro-cid-s244gf7m]:focus-visible,.choices[data-astro-cid-s244gf7m] button:focus-visible{outline:3px solid var(--blue);outline-offset:3px}button[data-astro-cid-s244gf7m]:disabled{opacity:.5;cursor:default}.primary[data-astro-cid-s244gf7m],button[data-astro-cid-s244gf7m][aria-pressed=true]{background:var(--blue);border-color:var(--blue);color:#fff}.practice-top[data-astro-cid-s244gf7m]{flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;display:flex}.board[data-astro-cid-s244gf7m]{border:1px solid var(--text);background:var(--paper);text-align:center;border-radius:22px;padding:24px}#quantity[data-astro-cid-s244gf7m]{border:1px solid var(--guide);background:var(--bg);border-radius:14px;min-height:245px;padding:18px}.tens[data-astro-cid-s244gf7m],.ones[data-astro-cid-s244gf7m]{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.ones[data-astro-cid-s244gf7m]{margin-top:18px}.tens[data-astro-cid-s244gf7m] .ten{border:2px solid var(--blue);border-radius:5px;grid-template-rows:repeat(2,12px);grid-template-columns:repeat(5,12px);gap:2px;padding:5px;display:grid}.tens[data-astro-cid-s244gf7m] .cell,.ones[data-astro-cid-s244gf7m] .one{background:var(--blue);border-radius:2px;width:12px;height:12px}.ones[data-astro-cid-s244gf7m] .one{width:22px;height:22px}.item-name[data-astro-cid-s244gf7m]{color:var(--blue);margin:20px 0 6px;font-size:clamp(40px,9vw,72px);font-weight:700}.reading[data-astro-cid-s244gf7m]{min-height:1.8em;margin:0 0 20px;font-size:clamp(18px,3vw,26px);font-weight:700}.hint[data-astro-cid-s244gf7m],.note[data-astro-cid-s244gf7m] p[data-astro-cid-s244gf7m]{font-size:13px;line-height:1.9}.actions[data-astro-cid-s244gf7m],.choices[data-astro-cid-s244gf7m]{margin-top:20px}.choices[data-astro-cid-s244gf7m] button{min-height:72px;font-size:22px;font-weight:700}.choices[data-astro-cid-s244gf7m] button[data-correct]{border:3px solid var(--blue)}#feedback[data-astro-cid-s244gf7m]{font-size:20px;font-weight:700}.note[data-astro-cid-s244gf7m]{border-top:1px solid var(--text);grid-template-columns:220px minmax(0,560px);gap:40px;padding:34px 0 64px;display:grid}.note[data-astro-cid-s244gf7m] a[data-astro-cid-s244gf7m]{color:var(--blue);padding:16px 0;display:inline-block}footer[data-astro-cid-s244gf7m]{border-top:1px solid var(--text);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;min-height:80px;display:flex}@media (width<=800px){.page[data-astro-cid-s244gf7m]{padding:0 18px}.heading[data-astro-cid-s244gf7m]{margin-top:52px}.meta[data-astro-cid-s244gf7m]{grid-template-columns:1fr auto}.meta[data-astro-cid-s244gf7m] span[data-astro-cid-s244gf7m]:nth-child(2){display:none}.note[data-astro-cid-s244gf7m]{grid-template-columns:1fr;gap:14px}}@media (width<=520px){.board[data-astro-cid-s244gf7m]{padding:20px 12px}#quantity[data-astro-cid-s244gf7m]{min-height:220px;padding-inline:8px}.tens[data-astro-cid-s244gf7m],.ones[data-astro-cid-s244gf7m]{gap:7px}.modes[data-astro-cid-s244gf7m]{gap:8px}button[data-astro-cid-s244gf7m]{padding-inline:8px}}