:root{--blue:#007bdd;--deep:#0053b5;--pale:#f0f8ff;--ink:#111827;--muted:#526276;--line:#dcebf8;--yellow:#fff000;font-family:'Noto Sans JP','Yu Gothic',Meiryo,sans-serif;color:var(--ink);font-size:16px;background:#dfedf7}*{box-sizing:border-box}body{margin:0}a{color:var(--deep);text-decoration:none}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #ffbd00;outline-offset:3px}.shell{max-width:560px;min-height:100dvh;margin:auto;background:var(--pale);box-shadow:0 0 65px #23466613;padding-bottom:100px}.header{height:80px;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;background:white;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:900;color:var(--ink);line-height:1.3}.brand small{font-size:12px;font-weight:600;display:block;letter-spacing:.06em;margin-top:4px}.logo{width:39px;height:42px;background:var(--blue);border-radius:8px;color:white;display:grid;place-items:center;font-size:22px}.help-link{border:1px solid #b1d8f6;border-radius:50%;width:36px;height:36px;display:grid;place-items:center;font-weight:bold}.bottom{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(100%,560px);background:#ffffffed;backdrop-filter:blur(15px);display:grid;grid-template-columns:repeat(3,1fr);padding:8px 5px calc(8px + env(safe-area-inset-bottom));border-top:1px solid var(--line);z-index:10}.bottom a{min-height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:14px;font-weight:700;color:var(--muted)}.bottom span{font-size:25px;line-height:28px}.bottom a[aria-current=page]{color:var(--deep)}main{padding:24px 20px 32px}.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:800;color:var(--deep);letter-spacing:.06em}.hero h1{font-size:34px;line-height:1.35;margin:12px 0;letter-spacing:-.04em;font-weight:900}.hero h1 mark{background:linear-gradient(transparent 70%,var(--yellow) 70%);color:var(--deep)}p{line-height:1.8}.muted{color:var(--muted)}.hero p{margin:0 0 22px;font-size:15px}.section-title{font-size:23px;line-height:1.4;margin:28px 0 16px;border-left:5px solid var(--blue);padding-left:12px}.search-label{font-size:14px;font-weight:700;display:block;margin-bottom:7px}.search-row{display:flex;gap:8px}.search-row input{min-width:0;flex:1;height:50px;border:1px solid #9dcbed;border-radius:11px;padding:0 12px;background:white}.primary{border:0;background:var(--deep);color:white;border-radius:11px;min-height:48px;padding:12px 18px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:12px}.suggestions{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin:12px 0 20px;font-size:14px;color:var(--muted)}.chip{display:inline-flex;align-items:center;border:1px solid #a7cfed;border-radius:30px;min-height:44px;padding:8px 14px;background:white;color:var(--deep);font-size:14px;font-weight:700}.results{font-size:14px;color:var(--muted);margin:20px 0 10px}.video-card{display:flex;gap:14px;align-items:center;background:white;border:1px solid var(--line);border-radius:15px;padding:16px;margin-bottom:11px;box-shadow:0 3px 8px #105ea405;scroll-margin-top:20px;color:var(--ink)}.tile{width:58px;height:62px;flex-shrink:0;border-radius:11px;background:#e3f3ff;display:grid;place-items:center;color:var(--blue);font-size:23px;font-weight:900}.card-copy{flex:1;min-width:0}.card-copy h2{font-size:17px;margin:5px 0;line-height:1.5;overflow-wrap:anywhere}.tag{font-size:12px;font-weight:700;color:var(--deep)}.card-copy small{font-size:13px;color:var(--muted)}.arrow{color:var(--blue);font-size:25px}.skip{position:fixed;top:-80px;padding:15px;background:white;z-index:99}.skip:focus{top:0}.page-title{font-size:30px;line-height:1.4;margin:12px 0 16px}.panel{background:white;border:1px solid var(--line);border-radius:16px;padding:20px;margin-top:20px}.back{display:inline-flex;align-items:center;min-height:44px;gap:8px;font-size:14px;font-weight:700;margin-bottom:16px}.empty{padding:28px 16px;text-align:center;background:white;border-radius:14px}.footer{text-align:center;font-size:13px;color:var(--muted);margin-top:32px}.focus-target:focus{outline:3px solid #82c9ff;outline-offset:4px}@media(max-width:360px){main{padding:20px 16px}.header{padding:14px 16px}.brand{font-size:16px}.hero h1{font-size:29px}.bottom a{font-size:12px}.video-card{gap:10px;padding:13px}.tile{width:45px}.search-row{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.hero{padding:4px 0 5px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.section-heading .eyebrow{font-size:11px;letter-spacing:.13em;margin-top:12px}.section-heading .section-title{margin-bottom:6px}.results{margin-top:8px}.thumb{width:116px;aspect-ratio:16/10;position:relative;flex-shrink:0;background:#dce8f0;border-radius:9px;overflow:hidden}.thumb img{width:100%;height:100%;object-fit:cover}.thumb-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:white;border-radius:50%;background:#10233880;width:28px;height:28px;display:grid;place-items:center;font-size:12px}.duration{position:absolute;bottom:4px;right:4px;background:#111b;color:white;padding:1px 4px;border-radius:3px;font-size:11px}.badge{display:inline-flex;border-radius:30px;background:#dcf1ff;color:var(--deep);font-size:14px;font-weight:800;padding:6px 13px}.player{position:relative;aspect-ratio:16/9;background:#111827;border-radius:14px;overflow:hidden;margin-top:16px}.player iframe{position:absolute;width:100%;height:100%;border:0;inset:0}.external-video{display:block;font-size:13px;margin:10px 0;min-height:32px;text-align:right}.video-note{font-size:14px;background:#e3f2fd;padding:12px 16px;border-radius:10px}.video-unavailable{aspect-ratio:16/9;background:#e3eff8;border:1px solid #c7e1f5;border-radius:14px;display:flex;flex-direction:column;justify-content:center;align-items:center;margin-top:18px;padding:16px;text-align:center}.video-unavailable p{font-size:14px;margin-bottom:0}.empty-play{font-size:25px;color:#789ab8;margin-bottom:12px}.panel h2{font-size:22px;margin:0 0 16px}.article{overflow-wrap:anywhere}.article p{font-size:16px;line-height:1.95;color:#334155}.article h3{font-size:18px;line-height:1.7;margin:8px 0 16px}.instruction{padding:18px 0;border-bottom:1px solid var(--line)}.instruction:last-child{border-bottom:0;padding-bottom:0}.instruction h3 span{color:var(--deep);margin-right:8px}.instruction h2{display:flex;align-items:center;gap:10px;font-size:21px}.outline{border:1px solid var(--blue);background:white;color:var(--deep);min-height:48px;padding:12px 18px;border-radius:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.full{width:100%}.return{margin-top:24px}.level-list{display:grid;gap:18px;margin-top:24px}.level-card{color:var(--ink);padding:24px;background:white;border:1px solid var(--line);border-radius:18px;box-shadow:0 5px 14px #0053b506}.level-card:first-child{border-top:4px solid #ffdf16}.level-card h2{font-size:24px;line-height:1.5;margin:14px 0 10px}.level-card p{color:var(--muted);margin:8px 0 16px}.level-top{display:flex;align-items:center;justify-content:space-between}.level-graphic{display:flex;align-items:end;gap:5px;height:34px}.level-graphic i{width:14px;height:16px;background:#d9e4ee;border-radius:3px}.level-graphic i:nth-child(2){height:25px}.level-graphic i:nth-child(3){height:34px}.level-graphic i.lit{background:var(--blue)}.meta-chips{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 18px}.meta-chips span{padding:7px 12px;border-radius:30px;background:#e5f4ff;color:var(--deep);font-weight:700;font-size:14px}.small{font-size:14px!important;line-height:1.8}.introduction{margin-top:0}.player-label{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:24px 0 12px}.player-label strong{font-size:18px}.practice-player{scroll-margin-top:20px}.group-heading{font-size:15px;color:var(--deep);background:#eef8ff;padding:10px 12px;border-radius:8px;margin:24px 0 0}.exercise-row{display:flex;gap:12px;padding:18px 0;border-bottom:1px solid var(--line)}.exercise-row>div{min-width:0;flex:1}.step-number{background:var(--blue);border-radius:50%;width:29px;height:29px;color:white;display:inline-grid;place-items:center;font-size:15px;flex-shrink:0}.exercise-row h4{font-size:17px;margin:0;line-height:1.6}.prescription{margin:6px 0;color:var(--muted);font-size:16px}.exercise-actions{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center}.exercise-actions a,.text-button{border:0;background:none;padding:8px 0;color:var(--deep);font-size:14px;font-weight:700;min-height:44px;display:inline-flex;align-items:center}.text-button[aria-pressed=true]{text-decoration:underline;text-underline-offset:5px}.note-box{background:#e9f6ff;border-radius:10px;padding:14px;font-size:14px;line-height:1.8}.check{display:flex;gap:12px;align-items:start;padding:12px 0;font-size:16px;line-height:1.7}.check input{width:22px;height:22px;accent-color:var(--blue);flex-shrink:0;margin-top:3px}.comparison>div{padding:12px;background:var(--pale);border-radius:10px;margin:12px 0}.comparison strong{color:var(--deep)}@media(max-width:400px){.thumb{width:88px}.card-copy h2{font-size:16px}.video-card{padding:13px;gap:10px}.level-card{padding:20px}.level-card h2{font-size:22px}.section-heading .eyebrow{display:none}}@media(min-width:1000px){body{background:radial-gradient(ellipse at 10% 20%,#d2edff,transparent 60%),#e9f1f7}.shell{max-width:560px}}

.hero-banner{margin:-24px -20px 24px;padding:0}.hero-banner img{display:block;width:100%;height:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:360px){.hero-banner{margin:-20px -16px 24px}}

.dekitore-promo{border-color:#b9dccf}.dekitore-promo p{font-size:16px;color:var(--muted);line-height:1.8}.dekitore-image-link{display:block;border-radius:12px;overflow:hidden;margin:18px -4px}.dekitore-image-link img{display:block;width:100%;height:auto}.dekitore-cta{background:var(--yellow);color:var(--deep);margin-top:4px}
.dekitore-promo{margin-top:0;margin-bottom:28px}