:root{color-scheme:light;--bg:#faf8f3;--surface:#fff;--text:#2d2926;--muted:#625d58;--line:#d9d4cb;--brand:#a83c28;--brand-ink:#fff;--soft:#f3e8de;--focus:#1266ad;--status:#145334;--error:#9c2626;--shadow:0 8px 32px #3428180d;font-family:"Noto Sans JP","Yu Gothic",Meiryo,sans-serif;font-size:16px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);line-height:1.9}a{color:var(--brand);text-underline-offset:.22em}a:hover{text-decoration-thickness:2px}button,input,textarea,select{font:inherit;color:inherit}button,select,summary{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.65}button,input,textarea,select{max-width:100%}a,button,summary,input,select,textarea{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:4px}h1,h2,h3,p,ul,ol,figure{margin-top:0}h1,h2,h3{line-height:1.6;overflow-wrap:anywhere;letter-spacing:0}h1{font-size:clamp(29px,4vw,42px);font-weight:700;margin-bottom:22px}h2{font-size:26px;margin-bottom:18px}h3{font-size:21px;margin-bottom:12px}p{margin-bottom:20px}img,video{max-width:100%;height:auto}video{display:block;width:100%;background:#111;border-radius:10px;margin:24px 0}ul,ol{padding-left:1.5em}li{margin:8px 0}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip{position:fixed;left:12px;top:-100px;z-index:100;padding:10px 18px;background:var(--surface)}.skip:focus{top:12px}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:12px 22px;border:1px solid transparent;border-radius:7px;background:var(--brand);color:var(--brand-ink);font-weight:600;text-decoration:none;line-height:1.7;white-space:normal;text-align:left}.button-small{font-size:15px;padding:10px 16px;min-height:44px}.button-quiet{background:var(--surface);color:var(--text);border-color:var(--line)}.text-link{display:inline-block;margin-top:8px;font-weight:600}.muted,.unavailable{color:var(--muted);font-size:15px}.eyebrow{font-size:14px;font-weight:600;color:var(--muted);margin-bottom:12px}.lead{font-size:21px;line-height:1.9}.notice{padding:16px 20px;background:var(--soft);border:1px solid var(--line);border-radius:8px;margin-bottom:24px}.notice-error{border-color:var(--error);color:var(--error)}.fixture-banner{font-size:14px;line-height:1.7;padding:12px 20px;background:#fff2bf;color:#493900;border-bottom:1px solid #c4a349}.brand{display:block;flex:none}.brand img{width:150px;height:50px;object-fit:contain;background:#fff;border-radius:3px}.public-header{display:flex;align-items:center;gap:32px;max-width:1280px;margin:auto;padding:20px 32px;border-bottom:1px solid var(--line)}.public-header nav{display:flex;gap:24px;flex:1;flex-wrap:wrap;font-size:15px}.public-header nav a{text-decoration:none;color:var(--text)}[aria-current=page]{font-weight:700;text-decoration:underline!important;text-decoration-thickness:3px!important;text-underline-offset:.4em}.public-main{max-width:1120px;margin:auto;padding:44px 32px 80px}.public-main>section{margin-bottom:64px}.home-intro{max-width:780px;padding:30px 0 24px}.home-intro h1{font-size:clamp(35px,5vw,53px);line-height:1.5}.home-intro p:not(.eyebrow){max-width:38em}.phone-break{display:none}.section-heading{display:flex;gap:20px;align-items:baseline;justify-content:space-between}.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:24px 0}.course-card,.instructor-card{padding:25px;background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:flex-start;overflow-wrap:anywhere}.course-card h2,.instructor-card h2{font-size:23px}.course-card p,.instructor-card p{font-size:16px}.course-card .text-link{margin-top:auto}.catalog-filter{display:grid;grid-template-columns:2fr 1fr 1fr auto;align-items:end;gap:16px;background:var(--surface);padding:22px;border:1px solid var(--line);border-radius:10px}.catalog-filter label{display:grid;gap:6px;font-size:15px}input,textarea,select{width:100%;padding:12px;border:1px solid var(--line);border-radius:6px;background:var(--surface);line-height:1.6}textarea{resize:vertical;min-height:130px}.reading-width{max-width:780px}.reading-width p,.reading-width li{font-size:18px}.reading-width h2{margin-top:36px}.reading-section{margin-top:36px}.course-price{font-weight:700;font-size:24px!important}.unit-list{padding-left:1.6em}.unit-list>li{padding:18px 0;border-bottom:1px solid var(--line)}.unit-list p{margin:8px 0}.instructor-photo{width:180px;height:180px;object-fit:cover;border-radius:50%;margin-bottom:22px}.article-list article{max-width:780px;padding:24px 0;border-bottom:1px solid var(--line)}.public-footer{border-top:1px solid var(--line);padding:32px max(24px,calc((100vw - 1056px)/2));font-size:15px}.public-footer p{margin:8px 0}.public-footer nav{display:flex;gap:22px;flex-wrap:wrap;margin-top:20px}.login-box{max-width:560px;margin:auto}.google-login .button{width:100%;min-height:54px;font-size:18px}.other-login{margin-top:28px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0}.other-login>summary{font-weight:600}.tabs{display:flex;margin:22px 0;border-bottom:1px solid var(--line);gap:6px}.tabs button{flex:1;padding:13px 10px;border:0;background:transparent;border-bottom:3px solid transparent;font-size:16px}.tabs button[aria-selected=true]{border-bottom-color:var(--brand);font-weight:700}.portal-form{margin:20px 0}.portal-form fieldset{border:0;padding:0;margin:0;min-width:0}.portal-form .button{margin-top:8px}.field{display:grid;gap:7px;margin:0 0 22px}.field>span{font-weight:600}.field small{color:var(--muted);font-size:14px;line-height:1.8}.check{display:flex;align-items:flex-start;gap:12px;line-height:1.8}.check input{width:20px;height:20px;flex:none;margin-top:5px}.form-status{font-size:15px;color:var(--muted);margin:12px 0}.empty{padding:28px;background:var(--surface);border:1px dashed var(--line);border-radius:9px}.empty h2{font-size:22px}.empty p{margin-bottom:0}.theme-control{display:grid;gap:6px;font-size:14px}.theme-control select{padding:9px;font-size:14px}.learner-shell{display:grid;grid-template-columns:248px minmax(0,1fr);min-height:100vh}.learner-sidebar{position:sticky;top:0;height:100vh;overflow-y:auto;background:var(--surface);border-right:1px solid var(--line);padding:28px 22px;display:flex;flex-direction:column;gap:22px}.sidebar-label{font-size:14px;color:var(--muted);margin:0}.learner-sidebar nav{display:grid;gap:7px}.learner-sidebar nav a{display:block;padding:11px 13px;text-decoration:none;color:var(--text);border-radius:6px}.learner-sidebar nav a[aria-current=page]{background:var(--soft)}.sidebar-bottom{margin-top:auto;padding-top:24px;font-size:14px}.logout-form{margin:18px 0}.logout-form .button{width:100%;background:var(--surface);color:var(--text);border:1px solid var(--line)}.logout-form .form-status{font-size:12px}.learner-workspace{min-width:0}.learner-topbar{display:flex;align-items:center;gap:20px;padding:17px 32px;background:var(--surface);border-bottom:1px solid var(--line)}.member-name{margin-left:auto;font-size:14px;overflow-wrap:anywhere}.drawer-toggle{display:none}.learner-main{padding:32px;max-width:1200px}.page-heading{max-width:850px;margin-bottom:28px}.page-heading h1{font-size:32px}.page-heading p{margin-bottom:10px}.panel{padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);margin:0 0 24px}.panel h2{font-size:24px}.panel.reading-width{max-width:850px}.panel.reading-width .reading-section:first-child{margin-top:0}.learning-course-list article{padding:18px 0;border-top:1px solid var(--line)}.learning-course-list article:first-child{border-top:0}.learning-course-list p{margin-bottom:10px}.qa{border-bottom:1px solid var(--line);padding:18px 0}.qa summary{font-weight:600}.qa p{margin:16px 0 0}.saved-status{color:var(--status);font-weight:600}.preserve-lines{white-space:pre-wrap;overflow-wrap:anywhere}.drawer-shade{display:none}
html[data-theme=dark]{color-scheme:dark;--bg:#171b20;--surface:#222831;--text:#f4f1eb;--muted:#c4c8cd;--line:#4d5968;--brand:#ffb399;--brand-ink:#25160f;--soft:#353e4a;--focus:#83c8ff;--status:#a1e7b9;--error:#ffaaa5;--shadow:none}
@media(prefers-color-scheme:dark){html[data-theme=system]{color-scheme:dark;--bg:#171b20;--surface:#222831;--text:#f4f1eb;--muted:#c4c8cd;--line:#4d5968;--brand:#ffb399;--brand-ink:#25160f;--soft:#353e4a;--focus:#83c8ff;--status:#a1e7b9;--error:#ffaaa5;--shadow:none}}
@media(max-width:1050px){.public-header{gap:20px;padding:18px 24px}.public-header nav{gap:16px}.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-filter{grid-template-columns:2fr 1fr 1fr}.catalog-filter>button{grid-column:1/-1;justify-self:start}.learner-shell{grid-template-columns:220px minmax(0,1fr)}.learner-main{padding:26px}}
@media(max-width:760px){.public-header{flex-wrap:wrap;gap:14px;padding:16px 20px}.public-header .brand{flex:1}.public-header nav{order:3;flex-basis:100%;gap:18px;font-size:14px}.brand img{width:132px;height:44px}.public-main{padding:28px 20px 52px}.public-main>section{margin-bottom:42px}.home-intro{padding:16px 0}.home-intro h1{font-size:34px}.phone-break{display:block}.lead{font-size:19px}.section-heading{display:block}.section-heading>a{display:inline-block;margin-bottom:10px}.catalog-grid{grid-template-columns:1fr;gap:17px}.catalog-filter{grid-template-columns:1fr 1fr;padding:18px;gap:14px}.catalog-filter label:first-child{grid-column:1/-1}.course-card,.instructor-card{padding:22px}.reading-width p,.reading-width li{font-size:18px}.reading-width h2{font-size:25px}.public-footer{padding:28px 20px}.learner-shell{display:block}.learner-sidebar{position:fixed;left:0;top:0;bottom:0;z-index:50;width:min(290px,86vw);height:100dvh;transform:translateX(-101%);transition:transform .18s ease;visibility:hidden}.portal-learner[data-drawer-open=true] .learner-sidebar{transform:none;visibility:visible}.portal-learner[data-drawer-open=true] .drawer-shade{display:block;position:fixed;inset:0;background:#0009;z-index:40}.drawer-toggle{display:inline-flex;font-size:14px;padding:8px 12px;min-height:42px}.learner-topbar{padding:14px 20px;gap:14px;flex-wrap:wrap}.learner-topbar>span:first-of-type{font-size:14px}.member-name{font-size:13px;max-width:100%;margin-left:auto}.learner-main{padding:24px 20px}.page-heading h1{font-size:28px}.panel{padding:22px}.panel h2{font-size:23px}.page-heading .lead{font-size:18px}.field small{font-size:14px}.portal-form .button{width:100%}.tabs button{font-size:15px}.fixture-banner{font-size:13px;padding:10px 20px}html[data-js=off] .learner-sidebar{position:static;width:auto;height:auto;transform:none;visibility:visible}html[data-js=off] .drawer-toggle{display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

.learning-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));list-style:none;padding:0;margin:24px 0;gap:32px}.learning-flow li{position:relative;border-top:3px solid var(--brand);padding:18px 0 0;margin:0}.learning-flow li>span{display:block;font-size:14px;color:var(--brand);margin-bottom:8px}.learning-flow strong{display:block;font-size:20px}.learning-flow p{font-size:16px;margin:10px 0 0}.learning-flow li:not(:last-child):after{content:"→";position:absolute;right:-25px;top:28px;color:var(--brand)}@media(max-width:760px){.learning-flow{grid-template-columns:1fr;gap:26px}.learning-flow li{padding-top:14px}.learning-flow li:not(:last-child):after{content:"↓";right:8px;top:auto;bottom:-28px}}

/* Root visual follow-up: a reachable close action inside the mobile drawer. */
.drawer-close{display:none}
@media(max-width:800px){.drawer-close{display:block;width:100%;min-height:44px;margin:0 0 16px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;color:var(--text);background:var(--panel);font:inherit;text-align:right;cursor:pointer}}