:root{font-family:"Noto Sans JP","Yu Gothic","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:#203b4f;background:#fff;font-synthesis:none;line-height:1.75;--canvas:#f5f9fc;--index:#eaf3fa;--selected:#d3e9f5;--ink:#203b4f;--blue:#397b9f;--border:#cadde9;--sidebar:clamp(336px,24.8vw,368px);--banner:30px;--toolbar:76px}
*{box-sizing:border-box}body{margin:0;font-size:15px}a{color:#28678c;text-underline-offset:4px}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button,a,summary{transition:background-color 140ms,color 140ms}button{cursor:pointer}[hidden]{display:none!important}img{display:block}h1,h2,p{margin:0}h1,h2{line-height:1.5;font-weight:700}h1{font-size:30px;letter-spacing:.01em}h2{font-size:22px}button:disabled{cursor:default}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #246d97;outline-offset:4px}main:focus,h1:focus{outline:none}.skip-link{position:fixed;top:0;left:16px;transform:translateY(-130%);z-index:10;background:#fff;padding:12px}.skip-link:focus{transform:translateY(0)}
.local-banner{height:var(--banner);display:flex;align-items:center;justify-content:center;padding:0 12px;background:#deedf6;color:#355b72;font-size:11px;letter-spacing:.04em}.site-header{min-height:var(--toolbar);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 36px;background:#fff}.brand{color:#234f6b;text-decoration:none;font-size:28px;font-weight:700;letter-spacing:.08em;line-height:1.3}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;border:1px solid transparent;border-radius:10px;padding:10px 20px;background:var(--blue);color:#fff;font-weight:700;text-decoration:none;line-height:1.5}.button:hover{background:#306c8e}.button.secondary{background:#fff;color:#28678c;border-color:#8bb0c7}.button.secondary:hover{background:var(--index)}.button:disabled{color:#688294;background:#e7eff4;border-color:transparent}.logout{font-size:14px;white-space:nowrap;margin-left:auto;min-height:44px;padding:9px 16px}.icon{width:20px;height:20px;flex-shrink:0}.breadcrumbs{display:flex;gap:14px;align-items:center;min-width:0;font-size:15px;font-weight:500}.breadcrumbs a{text-decoration:none;white-space:nowrap}.breadcrumbs span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.breadcrumbs .icon{width:16px;height:16px;opacity:.6}.site-footer{max-width:1080px;margin:64px auto 0;padding:24px 36px;color:#6a8392;font-size:11px;letter-spacing:.1em;border-top:1px solid #e0eaf0}
#main{min-height:calc(100vh - 230px);max-width:1080px;margin:0 auto;padding:48px 36px}.page-status{padding:24px 0;color:#577184}.eyebrow{color:#527990;font-size:12px;font-weight:700;letter-spacing:.12em;margin-bottom:12px}.intro{color:#5d7383;margin:14px 0 32px}.notice{padding:20px;background:var(--index);border-left:3px solid var(--blue);border-radius:0 10px 10px 0;line-height:1.8}.notice a{display:inline-block;margin-top:12px}.library-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:32px 0}.course-card{display:flex;flex-direction:column;align-items:flex-start;min-width:0;gap:20px;padding:28px;border:1px solid var(--border);border-radius:12px;text-decoration:none;background:var(--canvas)}.course-card:hover{background:var(--index)}.course-card h2{color:var(--ink);font-size:22px}.course-card p{color:#5d7383;font-size:14px}.card-action{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:8px;font-weight:700}.library-heading{max-width:680px}
body[data-view=lesson] .site-header{margin-left:var(--sidebar)}body[data-view=lesson] .header-brand{display:none}body[data-view=lesson] #main{max-width:none;padding:0;margin:0}body[data-view=lesson] .site-footer{margin-left:calc(var(--sidebar) + 36px);margin-right:36px}.lesson-layout{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr)}.viewer{grid-column:2;grid-row:1;min-width:0;padding:40px 36px;max-width:1440px;width:100%;margin:0 auto}.lesson-heading{display:flex;align-items:flex-start;gap:20px;margin:12px 0 40px}.lesson-heading h1{font-size:38px}.lesson-number{flex-shrink:0;background:var(--index);color:#28678c;padding:6px 16px;border-radius:8px;font-size:18px;font-weight:700;line-height:1.5;margin-top:4px}.lesson-body{white-space:pre-wrap;color:#5d7383;margin:0 0 24px;font-size:14px}.lesson-body:empty{display:none}.media-host{border-radius:12px;overflow:hidden;background:#152f43;min-width:0}.video-frame{display:block;width:100%;aspect-ratio:16/9;border:0}.pdf-frame{display:block;width:100%;height:72vh;min-height:420px;border:0;background:var(--canvas)}.document-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 20px;color:#5d7383;font-size:14px}.document-toolbar a{display:flex;align-items:center;gap:8px;min-height:44px}.lesson-pager{margin-top:40px;padding:24px;display:grid;grid-template-columns:minmax(100px,1fr) minmax(0,1.5fr) auto;align-items:center;gap:24px;background:var(--index);border-radius:12px}.pager-previous{display:inline-flex;align-items:center;gap:8px;min-height:44px;text-decoration:none;font-weight:700;font-size:14px}.pager-previous[aria-disabled=true]{color:#647f90}.pager-copy{border-left:1px solid #bfd6e5;padding-left:24px;min-width:0}.pager-copy p{font-size:12px;color:#527086;margin-bottom:4px}.pager-copy strong{display:block;font-size:17px;overflow-wrap:anywhere}.pager-next .icon{filter:brightness(0) invert(1)}
.course-outline{position:fixed;top:var(--banner);left:0;width:var(--sidebar);height:calc(100dvh - var(--banner));background:var(--index);padding:28px 0 16px;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#aecbdc transparent}.outline-brand{display:inline-block;margin:0 28px 38px}.course-back{display:flex;align-items:center;gap:8px;min-height:44px;margin:0 28px 14px;text-decoration:none;font-weight:700;font-size:14px}.course-description{padding:0 28px}.course-description h2{font-size:26px;letter-spacing:-.02em}.course-meta{color:#526f83;font-size:16px;margin-top:16px}.course-contents{margin-top:24px}.course-contents>summary{display:none}.search-field{position:relative;display:block;margin:0 28px 24px}.search-field>.icon{position:absolute;left:13px;top:14px;opacity:.65;pointer-events:none}.lesson-search{width:100%;height:48px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--ink);padding:10px 12px 10px 42px;font-size:14px}.lesson-search::placeholder{color:#607e92;opacity:1}.lesson-list{display:flex;flex-direction:column;padding:0 8px;gap:4px}.lesson-link{display:grid;grid-template-columns:30px minmax(0,1fr);align-items:start;gap:14px;padding:18px 20px;min-height:64px;color:var(--ink);text-decoration:none;border-radius:10px;font-size:16px;font-weight:500;line-height:1.75;overflow-wrap:anywhere}.lesson-link:hover{background:#dfedf6}.lesson-link[aria-current=page]{background:var(--selected);font-weight:700}.lesson-index{font-variant-numeric:tabular-nums;color:#2b7097;font-size:17px;line-height:1.55;font-weight:700}.lesson-kind{display:block;color:#527086;font-size:11px;font-weight:500;line-height:1.4;margin-bottom:3px}.search-empty{margin:12px 28px;color:#526f83;font-size:14px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.login-panel{max-width:520px;background:var(--canvas);border:1px solid var(--border);padding:32px;border-radius:12px;margin-top:32px}.login-panel label{display:block;margin:0 0 8px;font-weight:700;font-size:14px}.login-panel input{width:100%;height:48px;border:1px solid #acc8d9;border-radius:8px;padding:10px 14px;color:var(--ink);background:#fff}.login-panel input[readonly]{background:#eff4f8;color:#527086}.login-panel button{width:100%;margin-top:16px}.login-panel section{border-top:1px solid var(--border);padding-top:24px;margin-top:24px}.login-panel [role=status]{font-size:14px;line-height:1.8;margin-top:20px}.login-panel [role=status]:empty{display:none}
@media(min-width:1700px){:root{--sidebar:356px}.viewer{padding:40px 48px}.lesson-heading h1{font-size:34px}}
@media(min-width:900px) and (max-width:1199px){:root{--sidebar:288px}.site-header{padding:14px 24px}.viewer{padding:28px 24px}.lesson-heading{gap:14px}.lesson-heading h1{font-size:26px}.lesson-number{font-size:15px;padding:6px 12px}.outline-brand{margin-left:24px;margin-right:24px;font-size:22px}.course-description,.course-back{margin-left:0;margin-right:0;padding-left:24px;padding-right:24px}.course-description h2{font-size:21px}.lesson-link{padding:16px 14px;gap:10px;font-size:13px}.search-field{margin-left:20px;margin-right:20px}.lesson-pager{padding:20px;gap:16px;grid-template-columns:1fr auto}.pager-previous{grid-column:1/-1}.pager-copy{padding-left:0;border:0}.breadcrumbs .crumb-lesson{display:none}.breadcrumbs .crumb-last-divider{display:none}}
@media(max-width:899px){:root{--toolbar:68px}.site-header{padding:12px 24px;gap:16px}.brand{font-size:21px}.logout{font-size:12px;padding:9px 12px;gap:6px}.logout img{width:18px;height:18px}body[data-view=lesson] .site-header{margin-left:0}body[data-view=lesson] .header-brand{display:block}body[data-view=lesson] .breadcrumbs{display:none}#main{padding:32px 24px}.lesson-layout{display:flex;flex-direction:column}.viewer{padding:28px 24px 0}.lesson-heading{gap:12px;margin:4px 0 22px}.lesson-heading h1{font-size:24px}.lesson-number{font-size:13px;padding:6px 10px;margin-top:3px}.lesson-pager{margin-top:24px;padding:20px;gap:18px;grid-template-columns:1fr auto}.pager-previous{grid-column:1/-1;min-height:44px;font-size:13px}.pager-copy{padding-left:0;border:0}.pager-copy strong{font-size:15px}.pager-next{font-size:13px;padding:12px 14px;gap:6px}.course-outline{position:static;width:auto;height:auto;overflow:visible;margin:28px 24px 0;padding:24px 0;border-radius:12px}.outline-brand{display:none}.course-back{margin:0 24px 12px}.course-description{padding:0 24px}.course-description h2{font-size:20px}.course-meta{font-size:13px;margin-top:10px}.course-contents{margin-top:20px}.course-contents>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 24px;list-style:none;color:#28678c;font-weight:700;cursor:pointer;min-height:48px}.course-contents>summary::-webkit-details-marker{display:none}.course-contents[open]>summary img{transform:rotate(180deg)}.search-field{margin:12px 24px 20px}.lesson-list{padding:0 12px}.lesson-link{padding:14px 12px}.site-footer,body[data-view=lesson] .site-footer{margin:36px 24px 0;padding:24px 0}.pdf-frame{height:65vh;min-height:320px}.document-toolbar{align-items:flex-start;flex-direction:column;gap:8px}.library-grid{gap:16px}.course-card{padding:24px}.course-card h2{font-size:20px}}
@media(max-width:559px){h1{font-size:26px}.site-header{padding:12px 20px}.brand{font-size:19px;letter-spacing:.06em}.viewer{padding:24px 16px 0}.lesson-heading{display:block;margin-bottom:20px}.lesson-number{display:inline-block;font-size:12px;padding:4px 10px;margin:0 0 10px}.lesson-heading h1{font-size:23px;line-height:1.55}.lesson-pager{padding:18px;gap:14px;grid-template-columns:1fr}.pager-previous{grid-column:auto}.pager-copy p{font-size:11px}.pager-next{width:100%;justify-content:space-between}.course-outline{margin:24px 16px 0}.course-description{padding:0 20px}.course-back{margin-left:20px}.course-description h2{font-size:19px}.course-contents>summary{padding-left:20px;padding-right:20px}.search-field{margin-left:20px;margin-right:20px}.library-grid{grid-template-columns:1fr}#main{padding:32px 20px}.login-panel{padding:24px}.local-banner{font-size:10px}.site-footer,body[data-view=lesson] .site-footer{margin-left:20px;margin-right:20px}}
@media(prefers-reduced-motion:reduce){button,a,summary{transition:none}html{scroll-behavior:auto}}
html.live{--banner:0px}.legal-links{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 16px;margin-top:8px;font-size:12px}.legal-links a{color:inherit}