.number-line{width:100%;max-width:100%;overflow-x:auto;overflow-y:hidden;overscroll-behavior-x:contain;margin:24px 0 8px;padding:8px 4px 12px;scrollbar-width:thin;scrollbar-color:#8ca883 #eff3e7}.number-line-track{position:relative;display:flex;flex-wrap:nowrap;gap:5px;width:max-content;padding:17px 2px 3px}.number-line-track::before{content:"";position:absolute;top:8px;left:25px;right:25px;height:3px;background:#46735e;pointer-events:none}.number-stop{position:relative;flex:0 0 47px;border:1px solid #b8cbb2;border-bottom:4px solid #8ca883;min-width:47px;min-height:55px;background:#fffaf0;color:#203c35;font-weight:850}.number-stop::before{content:"";position:absolute;top:-17px;left:calc(50% - 1px);width:2px;height:16px;background:#46735e;pointer-events:none}.number-stop.start{background:#f6c75e;border-color:#b18834}.number-stop:hover{background:#deedd3}.number-stop:focus-visible,.number-line:focus-visible{outline:3px solid #215846;outline-offset:2px}.number-line-help{margin:0 0 20px;font-size:14px;color:#526858}.ten-frame{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;width:min(380px,100%);margin:25px auto}.ten-cell{height:62px;display:grid;place-items:center;border:2px solid #91ad84;background:white;color:#66805c;font-size:30px}.ten-cell.fixed{background:#eff5e8;color:#215846}.ten-cell.added{background:#fff0c6;color:#a15f16}.learning-clock{display:block;width:min(255px,100%);height:auto;margin:20px auto}.money-total{font-weight:900;font-size:1.5rem}.purse{min-height:45px;background:#f3eddc;border-radius:12px;padding:12px;font-weight:800}.coin{width:68px;height:68px;border:3px solid #be8d39;box-shadow:inset 0 0 0 4px #edcc7a;border-radius:50%;background:#f8dd98;color:#594217;font-weight:900}.coin:hover{background:#fff0c8}.sentence-line{font-size:1.6rem;font-weight:850;min-height:90px;padding:22px;border-bottom:3px solid #a7b895;background:#f7f4e9;border-radius:16px}.mirror-grid{display:grid;grid-template-columns:repeat(6,42px);gap:5px;justify-content:center;margin:24px auto}.mirror-cell{height:42px;display:grid;place-items:center;border:1px solid #58704f;background:#fff;font-size:25px;color:#215846;border-radius:5px}.mirror-cell.lit{background:#f6c75e}.mirror-cell.model{background:#edf2e7}.mirror-cell.model.lit{background:#d0dfbc}.mirror-cell.axis{border-right:4px solid #467c9e;margin-right:1px}.memory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:24px auto;max-width:480px}.memory-card{min-height:82px;border:2px solid #cbd7bf;background:#215846;color:#fff;font-size:1.3rem;font-weight:850;border-radius:13px}.memory-card.revealed{background:#fff6dd;color:#203c35}.memory-card.matched{background:#e5efd9;color:#203c35;opacity:1;border-color:#779b5b}.learning-clock text{user-select:none}.download-actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.guide-card{padding:26px;border:1px solid var(--line);border-radius:20px;background:white;text-decoration:none}.guide-card h3{line-height:1.3}.guide-card p{font-size:15px;color:var(--muted);margin:0}.guide-toc{padding:24px;background:#eef2e5;border-radius:18px;margin:24px 0}.guide-toc ol{margin:0}.guide-toc a{font-weight:750}.download-card{padding:28px;border-radius:22px;background:#eff3e7;border:1px solid #d3dfc7}.download-card h2{font-size:1.6rem}.download-card p{font-size:15px}.download-card .button{margin-top:12px}.reading-time{font-size:13px;color:var(--muted)}
@media(max-width:720px){.number-stop{flex-basis:44px;min-width:44px;min-height:48px}.number-line-track::before{left:24px;right:24px}.ten-cell{height:51px}.memory-grid{grid-template-columns:repeat(3,1fr);gap:8px}.memory-card{min-height:75px;font-size:1.2rem}.sentence-line{font-size:1.4rem;padding:17px}.mirror-grid{grid-template-columns:repeat(6,36px);gap:4px}.mirror-cell{height:36px}.coin{width:58px;height:58px}.guide-card{padding:22px}.guide-toc{padding:18px}}
@media print{.download-actions,.guide-toc{display:none}.learning-clock{width:180px}.mirror-grid,.ten-frame,.memory-grid{break-inside:avoid}}