@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&display=swap');
:root{--ink:#43354e;--muted:#716577;--purple:#70558b;--plum:#543b72;--lav:#eee6f6;--peach:#f8e3d6;--paper:#fffaf6;--line:#e5dce9;--green:#386958;--shadow:0 12px 38px #58456808;font-family:'Noto Sans JP',-apple-system,BlinkMacSystemFont,'Hiragino Sans','Yu Gothic',sans-serif;color:var(--ink);background:var(--paper);font-size:16px}*{box-sizing:border-box}body{margin:0;line-height:1.85}a{color:var(--plum);text-underline-offset:4px}button,input,select{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #9876b5;outline-offset:4px}img{max-width:100%;height:auto}h1,h2,h3,p{margin:0}h1,h2{font-family:inherit;letter-spacing:.025em;line-height:1.55}h1{font-size:clamp(1.8rem,3.3vw,2.75rem)}h2{font-size:clamp(1.4rem,2.5vw,1.85rem)}h3{font-size:1.12rem;line-height:1.65}.skip{position:absolute;top:-90px}.skip:focus{top:8px;background:white;z-index:30;padding:10px}.site-header{background:#fffdfbcc;border-bottom:1px solid var(--line)}.header-inner{max-width:1200px;margin:auto;padding:20px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-family:inherit;font-weight:700;font-size:1.25rem;display:flex;align-items:center;gap:12px;text-decoration:none;white-space:nowrap}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:50% 50% 40% 50%;background:var(--lav);font-family:inherit;font-size:1.3rem}.site-nav{display:flex;gap:25px;flex-wrap:wrap}.site-nav a{font-size:.9rem;text-decoration:none}.site-nav a[aria-current=page]{font-weight:700;text-decoration:underline}.wrap{max-width:1160px;margin:auto;padding:0 28px}.intro{display:grid;grid-template-columns:1.35fr 1fr;gap:60px;align-items:center;padding-top:42px;padding-bottom:36px}.intro p{max-width:590px;margin-top:15px}.eyebrow{font-size:.85rem;letter-spacing:.14em;color:var(--purple);font-weight:600;margin-bottom:12px}.intro figure{margin:0}.intro img{width:100%;max-height:260px;object-fit:cover;border-radius:90px 28px 90px 28px}.intro figcaption{font-size:.75rem;text-align:right;color:var(--muted);margin-top:6px}.lesson{border:1px solid var(--line);background:white;border-radius:28px;box-shadow:var(--shadow);overflow:hidden;margin-bottom:36px}.lesson-head{padding:22px 28px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:20px}.badge{border-radius:30px;padding:5px 14px;background:var(--lav);font-size:.85rem;white-space:nowrap}.lesson-grid{display:grid;grid-template-columns:1.12fr 1fr;gap:30px;padding:28px}.video-frame{border-radius:18px;overflow:hidden;background:#ede7f1;aspect-ratio:16/9}.video-frame iframe{width:100%;height:100%;border:0}.source{font-size:.8rem;color:var(--muted);margin-top:10px}.steps{display:grid;gap:12px;padding:0;list-style:none;counter-reset:step}.steps li{display:grid;grid-template-columns:32px 1fr;gap:12px;counter-increment:step}.steps li:before{content:counter(step,decimal-leading-zero);font-size:.85rem;color:var(--purple);display:grid;place-items:start center;padding-top:2px;border-radius:50%}.steps b{display:block;font-size:1rem}.steps p{font-size:.93rem;color:var(--muted)}.small-note{padding:14px 18px;border-radius:14px;background:var(--paper);font-size:.9rem;margin-top:16px}.button{border-radius:100px;border:1px solid var(--plum);background:var(--plum);color:white;padding:11px 22px;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;font-size:.93rem;font-weight:600;line-height:1.6}.button.secondary{background:white;color:var(--plum);border-color:var(--line)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.section{margin:48px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:22px}.section-heading p{color:var(--muted);margin-top:7px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:white;border:1px solid var(--line);border-radius:22px;padding:24px;display:flex;flex-direction:column;gap:11px}.card p{color:var(--muted);font-size:.95rem}.card a{margin-top:auto;text-decoration:none}.num{color:var(--purple);font-size:.9rem;letter-spacing:.12em}.notice{background:var(--lav);border-radius:22px;padding:24px 28px}.notice p{margin-top:9px}.site-footer{margin-top:60px;border-top:1px solid var(--line);padding:28px 0 32px;color:var(--muted);font-size:.85rem}.footer-row{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer-row div{display:flex;gap:20px}.site-footer p{margin-top:12px;max-width:800px}.breadcrumbs{padding-top:25px;font-size:.85rem;display:flex;gap:9px;flex-wrap:wrap}.page-heading{margin:28px 0 30px}.page-heading p{margin-top:13px;max-width:760px;color:var(--muted)}.article-grid{display:grid;grid-template-columns:1fr 270px;gap:38px;align-items:start}.prose h2{margin-top:38px;margin-bottom:14px}.prose p+p{margin-top:16px}.prose ul{padding-left:23px}.toc{padding:20px;background:white;border:1px solid var(--line);border-radius:20px;position:sticky;top:22px}.toc a{display:block;margin-top:10px;font-size:.9rem}.chip-row{display:flex;gap:9px;flex-wrap:wrap;margin:16px 0 22px}.chip{border:1px solid var(--line);border-radius:50px;background:white;color:var(--ink);padding:8px 17px;font-size:.9rem}.chip[aria-pressed=true]{background:var(--plum);color:white;border-color:var(--plum)}.study-status{font-size:.85rem;color:var(--green)}.word-card h3{font-size:1.4rem}.word-card .word-visual{height:80px;display:flex;align-items:center;font-family:inherit;font-size:2rem;color:var(--purple)}.word-card .word-visual:after{content:attr(data-cue);font-family:'Noto Sans JP',-apple-system,BlinkMacSystemFont,'Hiragino Sans','Yu Gothic',sans-serif;font-size:.85rem;color:var(--muted);margin-left:16px}.search{max-width:440px}.search label{display:block;font-size:.9rem;margin-bottom:7px}.search input{width:100%;border:1px solid var(--line);border-radius:50px;padding:11px 20px;background:white;color:var(--ink)}.checklist{list-style:none;padding:0;display:grid;gap:14px}.checklist label{display:flex;align-items:start;gap:12px}.checklist input{accent-color:var(--purple);width:20px;height:20px;flex-shrink:0;margin-top:5px}.success{color:var(--green);font-weight:600}.finger-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.finger{padding:18px 12px;border:1px solid var(--line);border-radius:18px;background:white;text-align:center}.finger img{display:block;margin:auto;width:100%;height:140px;object-fit:contain}.finger p{font-size:.85rem;margin-top:10px}.finger strong{font-size:1.5rem;font-family:inherit}.practice-panel{background:white;border:1px solid var(--line);border-radius:24px;padding:28px}.practice-card{margin-top:20px;background:var(--lav);padding:30px;border-radius:20px;text-align:center;min-height:260px;display:grid;place-content:center;gap:15px}.practice-card img{display:block;max-height:200px;width:auto;margin:auto}.practice-card h2{font-size:2rem}.question-choices{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:22px}.answer{padding:15px 18px;text-align:left;border:1px solid var(--line);border-radius:16px;background:white;color:var(--ink)}.answer.correct{background:#eaf4ee;border-color:#6c9d7f}.answer.wrong{background:#fbe9e5;border-color:#ba7262}.feedback{margin-top:20px;padding:20px;border-radius:16px;background:var(--paper)}[hidden]{display:none!important}details{border:1px solid var(--line);background:white;border-radius:16px;padding:18px 22px;margin-top:12px}summary{cursor:pointer;font-weight:600}details p{margin-top:12px;font-size:.95rem}.mini-table{width:100%;border-collapse:collapse;font-size:.93rem;margin:20px 0}.mini-table td,.mini-table th{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left}.mini-table th{background:var(--lav)}.convo{display:grid;gap:18px;margin:22px 0}.bubble{background:var(--lav);padding:20px 24px;border-radius:24px 24px 24px 4px;max-width:90%}.bubble.reply{justify-self:end;background:var(--peach);border-radius:24px 24px 4px 24px}.bubble small{display:block;color:var(--muted)}.lesson-nav{display:flex;justify-content:space-between;gap:20px;margin-top:35px}.empty{padding:30px;background:var(--lav);border-radius:20px}.term{font-size:.85rem;color:var(--muted)}.practice-form{display:flex;gap:14px;align-items:end;flex-wrap:wrap}.practice-form label{font-size:.9rem;display:grid;gap:6px}.practice-form select{border:1px solid var(--line);border-radius:14px;padding:9px 15px;background:white;color:var(--ink)}.timer{font-variant-numeric:tabular-nums;font-size:2rem;line-height:1.4;color:var(--plum)}.media-choice{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:20px}.media-choice button{background:white;border:1px solid var(--line);border-radius:18px;padding:20px;text-align:left;color:var(--ink)}.media-choice button[aria-pressed=true]{border-color:var(--purple);background:var(--lav)}.media-choice small{display:block;color:var(--muted)}.player-note{color:var(--muted);font-size:.9rem;margin-top:12px}html{scroll-behavior:smooth;scroll-padding-top:24px}@media(max-width:900px){.header-inner{align-items:start;flex-direction:column;gap:14px}.site-nav{gap:22px}.intro{gap:28px}.card-grid{grid-template-columns:repeat(2,1fr)}.article-grid{grid-template-columns:1fr}.toc{position:static}.finger-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:650px){.wrap{padding:0 18px}.header-inner{padding:16px 18px}.brand{font-size:1.1rem}.site-nav{gap:20px;flex-wrap:nowrap;overflow-x:auto;max-width:calc(100vw - 36px);width:100%;padding-bottom:4px}.site-nav a{white-space:nowrap;font-size:.875rem}.intro{grid-template-columns:1fr;padding-top:27px;gap:20px;padding-bottom:28px}.intro figure{max-width:400px}.intro img{max-height:190px;border-radius:55px 20px 55px 20px}.lesson-head{padding:19px 20px;align-items:start}.lesson-grid{grid-template-columns:1fr;gap:20px;padding:20px}.card-grid{grid-template-columns:1fr}.section{margin:34px 0}.section-heading{align-items:start;flex-direction:column;gap:12px}.badge{font-size:.8rem;padding:4px 10px}.finger-grid{grid-template-columns:repeat(2,1fr)}.finger img{height:140px}.question-choices{grid-template-columns:1fr}.practice-panel{padding:20px}.practice-card{padding:22px}.media-choice{grid-template-columns:1fr}.mini-table td,.mini-table th{padding:10px 8px}.bubble{max-width:96%}.notice{padding:20px}.lesson-nav{flex-wrap:wrap}.page-heading{margin-top:22px}h1{font-size:1.8rem}.footer-row{flex-direction:column}.site-footer{margin-top:38px}.word-card .word-visual{height:65px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.finger{margin:0;min-width:0}#name-form label{display:grid;gap:8px}#practice-name{font:inherit;border:1px solid var(--line);border-radius:12px;padding:12px;width:min(100%,280px);background:white;color:var(--ink)}

/* 最初は短い案内、必要な説明は開いて読む。 */
.start-hero{padding:58px 0 34px;max-width:760px}.start-hero h1{font-size:clamp(2rem,4.6vw,2.75rem);line-height:1.5}.start-hero>p:not(.eyebrow){margin:18px 0 24px}.start-hero .actions{margin:0 0 12px}.start-button{min-height:56px;padding:16px 28px;font-weight:700}.start-meta{color:var(--muted);font-size:.85rem}.home-route{margin-top:24px}.route-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}.route-card{display:flex;align-items:center;gap:18px;padding:24px;background:white;border:1px solid var(--line);border-radius:22px;text-decoration:none}.route-card>span{font-size:.85rem;background:var(--lav);padding:7px 10px;border-radius:10px}.route-card>div{flex:1}.route-card p{font-size:.85rem;color:var(--muted);margin-top:4px}.route-card:hover{border-color:var(--purple);background:#f8f3fc}.word-card .cue{font-size:.9rem;color:var(--muted);margin-top:10px}.word-card .study-status:empty{display:none}.word-card a{text-decoration:underline}.word-card{padding:22px}.learning-detail,.source-details{padding:0;border:1px solid var(--line);border-radius:16px;background:#fffdfb;margin:20px 0}.learning-detail>summary,.source-details>summary{font-size:1rem;font-weight:600;padding:17px 20px}.learning-detail[open]>summary,.source-details[open]>summary{border-bottom:1px solid var(--line);margin-bottom:18px}.learning-detail> :not(summary),.source-details> :not(summary){margin-left:20px;margin-right:20px}.learning-detail>:last-child,.source-details>:last-child{margin-bottom:20px}.source-details h2{font-size:1.1rem}.section:has(>.learning-detail){margin:24px 0}.more-explanation{margin:16px 0 0;background:var(--paper);border:0;padding:12px 16px;border-radius:12px;font-size:.9rem}.more-explanation summary{font-size:.85rem;font-weight:500}.lesson-grid>.steps{margin:0}.small-note{padding:10px 0;border:0;background:none}.small-note summary{font-size:.85rem;color:var(--muted)}.player-note{font-size:.85rem}.page-heading{padding-top:28px;padding-bottom:24px}.page-heading>p:last-child{max-width:680px}.prose section:has(>.learning-detail){margin-bottom:20px}.toc{font-size:.9rem}.site-footer{margin-top:48px}.site-footer p{font-size:.78rem}.home-route h2{font-size:1.35rem}
@media(max-width:900px){.route-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.start-hero{padding:34px 0 24px}.start-button{width:100%;text-align:center;padding:16px 18px}.start-hero .actions{display:block}.route-grid{grid-template-columns:1fr;gap:12px;margin-top:18px}.route-card{padding:18px 20px}.learning-detail>summary,.source-details>summary{padding:15px 16px}.learning-detail> :not(summary),.source-details> :not(summary){margin-left:16px;margin-right:16px}.home-route{margin-top:18px}.section{margin-top:28px}.word-card{padding:20px}}

.player-help{border:0;background:none;padding:10px 0;margin-top:5px}.player-help summary{font-size:.8rem;font-weight:500;color:var(--muted)}.player-help p{font-size:.85rem}.lesson+.lesson-nav{margin:0 0 32px}

@media(max-width:650px){.start-hero h1{font-size:clamp(1.6rem,8vw,2rem)}.home-route h2{font-size:1.12rem}}

@media(max-width:650px){.lesson-head{flex-wrap:wrap;gap:8px}.lesson-head h2{font-size:1.25rem}.page-heading{padding-top:8px;padding-bottom:12px}}

/* 見出しも本文と同じゴシック体で読む。 */
h1,h2{font-family:inherit;font-weight:700;letter-spacing:0;line-height:1.55}.brand{font-family:inherit;font-weight:700}.start-hero h1{line-height:1.6}

/* トップで写真を見て、すぐに手を動かせる入口。 */
.home-hero{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;padding-top:36px}.home-hero .start-hero{padding:28px 0;max-width:none}.home-hero h1{font-size:clamp(1.8rem,3.2vw,2.5rem)}.quick-fingers{background:#f3edf8;border:1px solid var(--line);border-radius:28px;padding:24px}.quick-fingers .eyebrow{font-size:.75rem;margin-bottom:6px}.quick-fingers h2{font-size:1.25rem}.quick-intro{font-size:.9rem;margin-top:6px}.quick-finger-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0}.quick-finger{margin:0;padding:12px 8px;background:white;border-radius:16px;text-align:center;min-width:0}.quick-finger figcaption{font-size:1.5rem;font-weight:700;color:var(--plum)}.quick-finger-photo{height:116px;display:grid;place-items:center}.quick-finger img{width:100%;height:116px;object-fit:contain}.quick-finger-photo>span{font-size:2.4rem;color:#ac98bd}.quick-finger p{font-size:.75rem;min-height:24px}.quick-recall-button{width:100%;font-size:.85rem;padding:10px 16px}.quick-status{font-size:.8rem;margin-top:8px;min-height:24px}.quick-finger-footer{display:flex;flex-direction:column;gap:4px;margin-top:12px;font-size:.8rem}.quick-finger-footer>span{font-size:.72rem;color:var(--muted)}.quick-credit{font-size:.7rem;margin-top:6px}.quick-words{margin:36px 0}.quick-words h2{font-size:1.3rem}.quick-word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:18px}.quick-word{display:flex;flex-direction:column;gap:10px;padding:24px;background:white;border:1px solid var(--line);border-radius:22px;text-decoration:none}.quick-word:hover{background:#f8f3fc;border-color:var(--purple)}.quick-word-scene{font-size:.8rem;color:var(--muted)}.quick-word h3{font-size:1.45rem}.quick-word p{font-size:.9rem;color:var(--muted)}.quick-word-action{font-size:.85rem;font-weight:600;display:flex;justify-content:space-between;gap:10px;margin-top:auto;padding-top:8px;color:var(--plum)}
@media(max-width:1000px){.home-hero{grid-template-columns:1fr;gap:16px;padding-top:8px}.home-hero .start-hero{padding:28px 0 12px}.quick-finger-photo,.quick-finger img{height:130px}.quick-fingers{padding:22px}.quick-word{padding:20px}.quick-word h3{font-size:1.25rem}}
@media(max-width:650px){.home-hero{padding-top:8px;gap:22px}.home-hero .start-hero{padding:22px 0 0}.home-hero h1{font-size:clamp(1.6rem,8vw,2rem)}.quick-fingers{padding:18px 14px;border-radius:22px}.quick-fingers h2{font-size:1.15rem}.quick-finger-grid{gap:8px;margin:14px 0}.quick-finger{padding:10px 4px}.quick-finger-photo,.quick-finger img{height:94px}.quick-finger p{font-size:.68rem;line-height:1.5}.quick-finger figcaption{font-size:1.3rem}.quick-word-grid{grid-template-columns:1fr;gap:12px}.quick-word{padding:18px 20px;gap:5px}.quick-words h2{font-size:1.15rem}.quick-word h3{font-size:1.35rem}.quick-words{margin:30px 0}.quick-status{font-size:.75rem}.quick-word-action{padding-top:6px}}

@media(min-width:901px){.home-hero{grid-template-columns:1fr 1fr;gap:24px;padding-top:30px}.home-hero h1{font-size:clamp(1.4rem,2.8vw,2.5rem)}.home-hero .start-hero{padding:20px 0}.quick-fingers{padding:20px}.quick-finger-grid{gap:10px}}
.quick-finger{display:grid;grid-template-rows:auto 116px 24px}.quick-finger p{align-self:center}
@media(max-width:1000px){.quick-finger{grid-template-rows:auto 130px 24px}}
@media(max-width:650px){.quick-finger{grid-template-rows:auto 94px 24px}}

@media(max-width:900px){.home-hero{grid-template-columns:1fr;gap:18px;padding-top:8px}.home-hero .start-hero{padding:20px 0 4px}.home-hero .start-hero>p:not(.eyebrow){margin:12px 0 16px}.home-hero .start-hero .actions{margin-bottom:8px}}