.practice-shell{width:min(1120px,calc(100% - 36px));margin:auto;padding-bottom:24px}.practice-head{text-align:center;padding:7px 0 15px}.practice-head h1{font:500 31px/1.6 var(--serif);letter-spacing:.1em}.practice-subtitle{font-size:17px;margin:2px 0}.practice-intro{font-size:15px;color:var(--muted)}.pdf-links{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;margin-top:12px}.pdf-caption{font-size:12px;color:var(--muted);margin-top:5px}.practice-progress{display:flex;justify-content:space-between;font-size:14px;border-block:1px solid var(--line);padding:7px 2px;color:var(--green)}.practice-nav{display:flex;justify-content:center;gap:7px;flex-wrap:wrap;padding:11px 0 15px;scroll-margin-top:10px}.practice-nav a{display:grid;place-items:center;min-width:38px;min-height:34px;background:#ffffffbb;border:1px solid var(--line);border-radius:8px;font-size:14px;position:relative}.practice-nav a[aria-current=page]{background:var(--green);color:#fff;border-color:var(--green)}.practice-nav a.correct::after{content:'✓';position:absolute;right:-3px;top:-8px;font-size:11px;color:#75632d;background:#f5ebce;border-radius:50%;width:15px;height:15px;line-height:15px;text-align:center}.practice-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:16px;align-items:start}.practice-card{padding:21px 23px}.practice-question-title{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px}.practice-question-title .number{font-size:27px}.practice-question-title h2{font:500 22px/1.5 var(--serif)}.practice-level{font-size:13px;color:var(--gold);margin-top:3px}.practice-prompt{font-size:16px;line-height:1.9}.practice-ask{font-size:16px;line-height:1.8;font-weight:600;padding-left:11px;border-left:3px solid #86ab98;margin-top:10px}.practice-figure{margin:17px 0 4px;border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}.practice-figure svg{display:block;width:100%;height:auto;max-height:305px}.practice-figure text{font-family:'Yu Gothic','Hiragino Kaku Gothic ProN','Noto Sans JP',sans-serif}.practice-guide{font-size:14px;color:var(--muted);margin-top:8px;line-height:1.8}.draw-space{min-height:170px;margin-top:18px;padding:12px;border:1px dashed #a8bfb0;border-radius:12px;background:#fff}.draw-space p{font-size:14px;color:var(--muted)}.memo-label{font-size:16px;font-weight:500;display:block;margin-bottom:7px}#practice-memo{font:16px/1.9 'Yu Gothic','Hiragino Kaku Gothic ProN',sans-serif;color:var(--ink);resize:vertical;width:100%;min-height:126px;border:1px solid #b5caba;border-radius:10px;padding:10px 12px;background:repeating-linear-gradient(#fff 0,#fff 29px,#eef3ed 30px)}#practice-memo:focus-visible{outline:3px solid #bc9144;outline-offset:3px}#practice-memo::placeholder{font-size:14px;color:#79877e}.memo-note{font-size:13px;color:var(--muted);margin:5px 0 14px}#practice-form>label{display:block;margin-bottom:6px;font-size:15px}.practice-support{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:13px;border-top:1px solid var(--line);padding-top:11px}.practice-step-list{padding:0;list-style:none}.practice-step-list li{margin:13px 0;line-height:1.8}.practice-step-list span{display:block;font-size:14px}.practice-step-list strong{display:block;font-size:18px;font-weight:500;margin:4px 0;color:var(--deep);overflow-wrap:anywhere}.practice-answer{font-size:20px;color:var(--deep);margin:12px 0}.practice-check{font-size:14px;line-height:1.8;border-top:1px solid var(--line);padding-top:9px}.practice-pagination{display:flex;justify-content:space-between;gap:12px;margin:15px 0}.related-lesson{text-align:center;font-size:14px;color:var(--green);margin:12px 0}.practice-toc-entry{margin-top:22px;border:1px solid #b4c9b9;border-radius:15px;padding:17px 20px;background:#fffdf5}.practice-toc-entry h2{font:500 21px/1.6 var(--serif)}.practice-toc-entry p{font-size:14px;color:var(--muted);margin:5px 0 12px}.practice-toc-entry .pdf-links{justify-content:flex-start;margin:0}.practice-toc-entry .btn.primary{font-size:15px}
@media(max-width:760px),(max-aspect-ratio:3/4){.practice-shell{width:min(730px,calc(100% - 22px))}.practice-layout{grid-template-columns:1fr}.practice-card{padding:16px 18px}.practice-head h1{font-size:27px}.practice-head{padding-bottom:12px}.practice-nav{gap:6px}.practice-nav a{min-width:35px;min-height:32px}.practice-figure svg{max-height:300px}.draw-space{min-height:105px}.practice-question-title h2{font-size:21px}}
@media(max-width:480px){.practice-shell{width:calc(100% - 18px)}.practice-head{padding-top:2px}.practice-head h1{font-size:25px}.practice-subtitle{font-size:15px}.practice-intro{font-size:14px}.practice-nav{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}.practice-nav a{min-width:0}.practice-prompt,.practice-ask{font-size:16px}.practice-card{padding:14px}.practice-question-title h2{font-size:20px}.practice-figure svg{max-height:240px}.practice-guide{font-size:14px}.practice-step-list strong{font-size:17px}.practice-progress{font-size:13px}.practice-head .pdf-links{gap:6px}.practice-head .pdf-links .btn{font-size:13px}.practice-support .quiet-button{font-size:12px;max-width:145px}.practice-toc-entry{padding:13px}.practice-toc-entry h2{font-size:18px}}