@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800;900&display=swap');
:root{font-family:'Noto Sans JP',sans-serif;color:#27203e;background:#f6f3ff;font-synthesis:none;--purple:#603ae3;--muted:#70667f;--line:#dfd8ed}*{box-sizing:border-box}body{margin:0}a{color:inherit}a:focus-visible,summary:focus-visible{outline:3px solid #f3784e;outline-offset:5px}a,summary{-webkit-tap-highlight-color:transparent}.site-header{max-width:1200px;padding:28px 28px 23px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:24px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;font-weight:900;font-size:18px;white-space:nowrap;letter-spacing:.04em}.brand span{background:var(--purple);color:white;padding:5px 8px;margin-left:5px;border-radius:5px}nav{display:flex;gap:24px;font-size:14px;font-weight:600}nav a{text-decoration:none;padding:8px 0;color:var(--muted)}nav a[aria-current]{color:var(--purple);border-bottom:2px solid var(--purple)}main{max-width:1200px;padding:0 28px;margin:auto}.shelf-intro{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:44px 0 32px}.eyebrow{margin:0 0 12px;font-size:13px;font-weight:800;letter-spacing:.12em;color:var(--purple)}h1{font-size:clamp(28px,3.5vw,44px);line-height:1.4;letter-spacing:-.045em;margin:0;font-weight:900}.narrow{display:none}.intro-copy{font-size:15px;line-height:1.95;color:#655b77;margin:16px 0 0}.shuhari{display:flex;gap:24px;flex-shrink:0}.shuhari>span{font-size:28px;font-weight:800;color:#897e9b;text-align:center}.shuhari>span.active{color:var(--purple)}.shuhari small{display:block;font-size:12px;font-weight:500;margin-top:9px}.shuhari .active:before{content:'';display:block;height:4px;background:var(--purple);border-radius:9px;margin-bottom:5px}.first-exercise{display:grid;grid-template-columns:1.15fr 1fr;background:#211d30;color:#fff;border-radius:22px;overflow:hidden;box-shadow:0 8px 0 #ded6ed}.first-cover{position:relative;min-height:370px;display:block;overflow:hidden;background:#182822}.first-cover img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover}.image-label{position:absolute;left:16px;bottom:16px;background:#1e1c2deb;color:#fff;padding:6px 10px;font-size:12px;border:1px solid #ffffff30;border-radius:5px;line-height:1.5}.first-body{padding:28px 30px}.card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);line-height:1.5}.entry-no{color:#c9b9fc;font-weight:700;letter-spacing:.12em}.state{font-size:12px;white-space:nowrap;color:#756982;background:#f2edf8;border:1px solid #e5ddee;border-radius:5px;padding:4px 8px}.state.reference_checked{background:#473566;border-color:#705496;color:#eee2ff}.first-body h2{font-size:39px;line-height:1.25;letter-spacing:-.05em;margin:19px 0 14px}.first-description{font-size:17px;line-height:1.85;margin:0;color:#eee9fa}.current-note{font-size:14px;line-height:1.85;color:#bfb7d0;margin:16px 0 20px}.first-links{display:flex;flex-direction:column;gap:12px}.primary-link{display:flex;justify-content:space-between;gap:12px;background:#cab9ff;color:#241a3d;font-weight:700;padding:13px 16px;border-radius:9px;text-decoration:none;font-size:14px}.primary-link:hover{background:#ded3ff}.reference-link{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:14px;font-weight:600;text-decoration:none;padding:6px 0;text-underline-offset:4px}.reference-link:hover{text-decoration:underline}.first-links>.reference-link{color:#d1c7e2;font-size:13px}.process{border-top:1px solid #ffffff25;margin-top:18px;padding-top:14px;font-size:13px;color:#d1c7e2;line-height:1.8}.process summary{cursor:pointer}.process ol{padding-left:22px}.process li+li{margin-top:7px}.process p{color:#a89db8;font-size:12px}.shelf{margin-top:56px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px}.section-heading .eyebrow{font-size:11px;margin-bottom:8px}.section-heading h2{font-size:26px;line-height:1.5;letter-spacing:-.04em;margin:0}.section-heading>p{font-size:14px;white-space:nowrap;margin:0 0 3px}.section-heading>p span{color:var(--muted);font-size:12px}.source-note{font-size:13px;line-height:1.9;color:var(--muted);margin:14px 0 24px}.exercise-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px 22px}.exercise{min-width:0;background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden;box-shadow:0 5px 0 #e8e2f4;transition:transform .2s}.exercise:hover{transform:translateY(-4px)}.reference-cover{display:block;position:relative;aspect-ratio:16/10;overflow:hidden;background:#2a263a}.reference-cover img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .3s}.reference-cover:hover img{transform:scale(1.035)}.reference-cover .image-label{left:10px;bottom:10px;font-size:11px;padding:4px 7px}.exercise-body{padding:18px 20px}.exercise-body h3{font-size:21px;letter-spacing:-.04em;line-height:1.4;margin:13px 0 9px;overflow-wrap:anywhere}.exercise-body>p{font-size:14px;color:#655b77;line-height:1.85;margin:0 0 19px;min-height:2.6em}.exercise-body .reference-link{font-size:13px;border-top:1px solid #eee8f6;padding-top:13px;color:#5931c6}.own-image{width:100%;height:auto;border-radius:7px}.own-link{display:block;background:#603ae3;color:white;padding:12px;border-radius:7px;text-decoration:none}.shelf-ending{margin:48px 0 42px;padding:25px 28px;border:2px dashed #c8bce6;border-radius:15px;display:flex;align-items:center;gap:22px}.ending-mark{font-size:42px;color:#a38bcf}.shelf-ending h2{font-size:18px;margin:0 0 8px}.shelf-ending p{font-size:14px;line-height:1.8;color:var(--muted);margin:0}.shelf-ending>a{margin-left:auto;font-size:14px;color:#603ae3;text-underline-offset:4px;white-space:nowrap}footer{max-width:1200px;margin:auto;padding:0 28px 32px;display:flex;justify-content:space-between;gap:24px;font-size:13px;line-height:1.8;color:var(--muted)}footer p{margin:0}footer p:first-child{font-weight:700}footer p:first-child span{font-weight:400;margin-left:10px}footer small{font-size:11px}footer a{text-underline-offset:3px}@media(min-width:1500px){.first-cover{min-height:430px}}@media(max-width:900px){.shuhari{gap:16px}.first-exercise{grid-template-columns:1fr 1fr}.first-body{padding:25px}.exercise-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.first-cover img{object-position:60% center}}@media(max-width:620px){.site-header{padding:22px 20px 14px;flex-wrap:wrap;gap:14px}.brand{font-size:16px}nav{gap:22px;font-size:13px;width:100%}main{padding:0 20px}.shelf-intro{padding:28px 0 23px;display:block}.narrow{display:block}.intro-copy{font-size:14px}.shuhari{margin:22px 0 0;justify-content:flex-start;gap:28px}.shuhari>span{font-size:22px;display:flex;align-items:center;gap:7px}.shuhari small{margin:0;font-size:11px}.shuhari .active:before{display:none}.first-exercise{grid-template-columns:1fr;border-radius:16px}.first-cover{min-height:0;aspect-ratio:16/10}.first-body{padding:23px}.first-body h2{font-size:34px}.first-description{font-size:16px}.shelf{margin-top:40px}.section-heading{display:block}.section-heading h2{font-size:23px}.section-heading>p{margin-top:10px}.exercise-grid{gap:22px;grid-template-columns:1fr}.reference-cover{aspect-ratio:16/9}.exercise-body{padding:20px}.exercise-body>p{min-height:0}.shelf-ending{padding:23px 18px;flex-wrap:wrap;gap:13px}.ending-mark{font-size:30px}.shelf-ending h2{font-size:16px}.shelf-ending>a{margin:4px 0 0 44px}footer{padding:0 20px 25px;flex-direction:column;gap:15px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

.own-first{margin-top:32px}.own-first .exercise{max-width:520px}@media(min-width:621px) and (max-width:900px){.shelf-intro{flex-wrap:wrap;gap:22px}.shelf-intro>div:first-child{flex:1 0 100%}.shuhari{gap:28px}.first-exercise{grid-template-columns:1fr}.first-cover{min-height:0;aspect-ratio:16/9}.first-cover img{object-position:center}.first-body{padding:28px}}

.compare-link{display:flex;justify-content:space-between;gap:12px;background:#f0e9ff;border:1px solid #e0d3fb;color:#5931c6;font-size:13px;font-weight:700;padding:11px 12px;text-decoration:none;border-radius:8px;margin-bottom:10px}.compare-link:hover{background:#e5d9ff}.first-links>.primary-link+.primary-link{background:transparent;border:1px solid #69587f;color:#e1d6f0}