@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800&family=Noto+Serif+JP:wght@500;600;700&display=swap');
@import url('./lesson-visuals.css');
@import url('./article-media.css');
:root{--bg:#f6f5f1;--paper:#fff;--ink:#253c3d;--muted:#77807d;--teal:#193f40;--teal-soft:#e8efeb;--orange:#bc6e42;--line:#e5e7e0;--cream:#f5e9d6;--radius:16px;--sidebar:238px;font-family:'Noto Sans JP',system-ui,sans-serif;color:var(--ink);background:var(--bg);font-size:14px;line-height:1.8;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #bc6e42;outline-offset:4px}button{color:inherit}h1,h2,h3,p{margin-top:0}h1{font-size:29px;letter-spacing:.02em;line-height:1.6;margin-bottom:10px;font-weight:700}h2{font-size:19px;line-height:1.65;margin-bottom:12px}h3{font-size:16px;line-height:1.7}p{margin-bottom:16px}ul,ol{padding-left:1.4em}img,svg,video{max-width:100%}hr{border:0;border-top:1px solid var(--line);margin:28px 0}.muted{color:var(--muted)}.tiny{font-size:11px}.center{text-align:center}.glyph{display:inline-block;min-width:1.25em;text-align:center;font-size:1.5em;font-family:system-ui;line-height:1;vertical-align:-.07em}.eyebrow{font-size:10px;letter-spacing:.18em;font-weight:700;color:var(--orange);margin-bottom:10px}.skip-link{position:fixed;left:15px;top:-80px;z-index:100;background:white;padding:10px 20px}.skip-link:focus{top:15px}.sidebar{width:var(--sidebar);height:100dvh;position:fixed;inset:0 auto 0 0;background:#fbfcf9;border-right:1px solid var(--line);padding:34px 22px;z-index:30;display:flex;flex-direction:column}.brand{display:flex;gap:10px;align-items:center;font-size:18px;font-weight:800;letter-spacing:.03em;white-space:nowrap}.brand small{display:block;font-size:7px;font-weight:600;letter-spacing:.18em;color:var(--muted);margin-top:1px}.brand-mark{width:38px;height:42px;border-radius:10px 10px 14px 4px;background:var(--teal);color:#f1dfc0;display:grid;place-items:center;font-family:'Noto Serif JP',serif;font-size:24px}.sidebar-label{font-size:9px;letter-spacing:.16em;color:#939c94;margin:48px 14px 15px}.nav-link{display:flex;align-items:center;gap:13px;padding:13px 14px;margin-bottom:7px;border-radius:9px;font-size:12px;color:#74807c;font-weight:500}.nav-link.active{color:var(--teal);background:#e8efea;font-weight:700}.nav-link:hover{background:#eef1eb}.nav-link .glyph{font-size:24px;min-width:22px}.nav-link small{margin-left:auto;font-size:9px;background:var(--teal);color:white;padding:1px 6px;border-radius:8px}.sidebar-bottom{margin-top:auto;padding:24px 12px 0;color:#8a918b}.sidebar-bottom p{font-size:12px;line-height:2;margin-top:15px}.sidebar-bottom>a{font-size:10px;display:flex;justify-content:space-between;gap:10px}.small-chip{border:1px solid #cdd6c9;border-radius:4px;padding:3px 6px;color:#7c8977;font-size:8px;letter-spacing:.15em}.workspace{margin-left:var(--sidebar)}.topbar{height:78px;padding:0 48px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:rgba(251,252,249,.7)}.breadcrumb{font-size:11px;color:#737f78}.top-actions{display:flex;align-items:center;gap:20px}.today{font-size:10px;color:#7e897f}.avatar{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:#e9dfcb;color:#6b674e;font-size:12px}.mobile-menu{display:none}main{max-width:1440px;margin:0 auto;padding:38px 48px 56px;min-height:80vh;outline:none}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px}.page-heading .muted{font-size:12px;margin:0}.outline-chip{font-size:10px;white-space:nowrap;border:1px solid #d4dbd1;border-radius:20px;padding:7px 14px;color:#7b897b}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px}.section-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:18px}.section-top h2,.section-top p{margin:0}.section-top .eyebrow{margin-bottom:5px}.dashboard-grid{display:grid;grid-template-columns:minmax(0,2.35fr) minmax(230px,1fr);gap:22px}.next-card{border-radius:var(--radius);background:var(--teal);color:white;overflow:hidden;display:flex;position:relative;min-height:296px}.next-copy{position:relative;z-index:1;padding:28px 30px;width:73%}.light-label{font-size:10px;letter-spacing:.14em;color:#c8d4c4}.light-label span{letter-spacing:.03em;font-size:10px;margin-left:12px;color:#a7beb3}.next-card h2{font-family:'Noto Serif JP',serif;font-size:25px;line-height:1.7;max-width:400px;margin:17px 0 12px;font-weight:600}.next-copy>p{color:#b9cec4;font-size:11px;max-width:360px;margin:0 0 16px}.next-meta{display:flex;gap:14px;align-items:center;margin-bottom:22px;color:#c2d3c9;font-size:10px}.next-card .subject-tag{background:#315754;color:#e0ddba!important}.next-card .glyph{font-size:14px}.button{display:inline-flex;align-items:center;justify-content:center;gap:25px;padding:11px 19px;line-height:1.6;border-radius:7px;border:1px solid transparent;font-size:12px;font-weight:600;transition:background .18s,transform .18s}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--teal);color:white}.button.primary:hover{background:#2c5552}.button.cream{background:var(--cream);color:#3b554d}.button.secondary{background:white;border-color:#cdd8cf;color:var(--teal)}.button.subtle{background:#eff2ec;color:#58725e;border-color:transparent}.button.full{width:100%}.hero-illustration{position:absolute;right:0;top:0;bottom:0;width:38%;overflow:hidden;opacity:.95}.orbit{position:absolute;width:270px;height:270px;border:1px solid #759a7d44;border-radius:50%;top:70px;left:0}.orbit-two{width:360px;height:360px;left:-45px;top:25px}.book-object{position:absolute;right:40px;top:75px;width:105px;height:145px;background:#e8d2a7;border-radius:2px 10px 9px 2px;transform:rotate(13deg);box-shadow:-9px 5px 0 #8b9e80,0 12px 25px #0e292755;border-left:6px solid #bda06f;color:#3d6454;display:grid;place-items:center;font-size:25px;font-family:'Noto Serif 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var(--line);border-radius:12px;transition:box-shadow .2s,transform .2s}.subject-card:hover,.lesson-card:hover{box-shadow:0 7px 20px #193f400d;transform:translateY(-3px)}.subject-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.subject-number{color:#abb0a4;font-family:system-ui;font-size:9px;letter-spacing:.1em}.subject-symbol{background:color-mix(in srgb,var(--subject),white 92%);color:var(--subject);border-radius:8px;width:38px;height:38px;display:grid;place-items:center;font-family:'Noto Serif JP',serif;font-size:19px}.subject-card h3{font-size:16px;margin-bottom:7px}.subject-card>p{font-size:10px;color:#8b9389;line-height:1.9;min-height:3.8em;margin-bottom:17px}.subject-progress{height:3px;border-radius:2px;background:#edf0e9;margin-bottom:11px}.subject-progress>span{height:100%;display:block;background:var(--subject);border-radius:inherit}.subject-bottom{display:flex;justify-content:space-between;font-size:10px;color:#778676}.subject-bottom>.muted{color:#9ba293}.bottom-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:22px}.bottom-grid h2{font-size:16px}.weekly-chart{display:grid;grid-template-columns:repeat(7,1fr);height:157px;gap:20px;padding:4px 6px 0}.chart-day{display:flex;align-items:center;flex-direction:column;font-size:9px;color:#98a18e}.bar-track{height:100%;width:20px;border-radius:4px;background:#f3f4ef;position:relative;margin:4px 0 7px}.bar-track>div{position:absolute;bottom:0;left:0;width:100%;min-height:1px;background:#d4dfc4;border-radius:4px}.chart-day.is-today .bar-track>div{background:#577d67}.chart-value{font-family:system-ui;font-size:10px}.study-note{background:#eeeee3;position:relative;padding-right:50px;overflow:hidden;border-color:#e7e8db}.study-note h2{font-family:'Noto Serif JP',serif;font-size:22px;line-height:1.6}.study-note>p:not(.eyebrow){font-size:10px;color:#8a927f;max-width:330px}.note-icon{position:absolute;right:27px;top:20px;font-size:45px;color:#b8bd9d}.site-footer{border-top:1px solid var(--line);padding:20px 48px;display:flex;gap:20px;justify-content:space-between;font-size:9px;color:#9aa092}.site-footer span{margin-right:auto}#toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%,20px);background:#253f39;color:#fff;padding:12px 22px;border-radius:10px;box-shadow:0 4px 30px #0002;font-size:12px;opacity:0;pointer-events:none;transition:.2s;z-index:100;max-width:90vw}#toast.visible{opacity:1;transform:translate(-50%,0)}.notice{background:#f0f1e8;border:1px solid #e3e6d7;border-radius:9px;padding:15px 19px;font-size:11px;color:#7c846e;margin:24px 0;line-height:2}.notice b{color:#5a6f58}.library-tools{display:flex;gap:18px;justify-content:space-between;flex-wrap:wrap;margin:32px 0 24px}.filter-tabs{display:flex;gap:4px;flex-wrap:wrap}.filter-tab{background:transparent;border:0;border-radius:6px;padding:8px 12px;font-size:11px;color:#8b9689}.filter-tab.active{background:var(--teal);color:white}.search-box{display:flex;align-items:center;border:1px solid var(--line);background:white;border-radius:7px;padding:4px 11px;color:#81917e;min-width:240px;gap:7px}.search-box input{width:100%;border:0;outline:none;background:none;font-size:11px;padding:5px}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}.lesson-card{display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:12px;padding:22px;transition:.2s}.lesson-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.subject-tag{font-size:10px;color:var(--subject);background:color-mix(in srgb,var(--subject),white 92%);border-radius:4px;padding:3px 8px;display:inline-flex;align-items:center;line-height:1.8;white-space:nowrap}.lesson-card h3{font-size:17px;margin-bottom:12px}.lesson-card>p{font-size:11px;line-height:1.9;color:#8a9389;margin-bottom:25px}.lesson-card-bottom{border-top:1px solid var(--line);padding-top:12px;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#6c846f;margin-top:auto}.empty-state{grid-column:1/-1;text-align:center;padding:80px 25px}.empty-state>p{color:var(--muted)}.loading{padding:80px;text-align:center;color:var(--muted)}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 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small{font-size:10px;color:#9da48f;font-weight:400;margin-left:auto}.input-section{padding:26px 0 30px;border-bottom:1px solid var(--line);scroll-margin-top:25px}.section-number{font-family:system-ui;color:#acb69e;font-size:11px;letter-spacing:.1em}.input-section h2{font-size:22px;margin:7px 0 20px}.body-copy{font-size:14px;line-height:2.2;letter-spacing:.02em}.example-box{background:white;border-left:3px solid #acbf94;border-radius:0 9px 9px 0;padding:20px 24px;margin:24px 0}.example-box b{font-size:12px;color:#75865f}.example-box p{font-size:13px;line-height:2;margin:8px 0 0}.pitfall{display:flex;gap:14px;padding:10px 0;color:#9b765d}.pitfall>span{border:1px solid #cab59f;border-radius:50%;height:22px;min-width:22px;display:grid;place-items:center;font-size:12px;line-height:1;margin-top:3px}.pitfall b{font-size:11px}.pitfall p{font-size:12px;line-height:2;margin:4px 0 0}.key-points{background:#ebeee0;border-radius:12px;padding:27px 30px;margin:30px 0}.key-points 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.feedback.incorrect>b{color:#8d4326}
.feedback .answer-key{font-size:14px}
.feedback .tiny{font-size:13px}
.plan-tasks p,.revisit-link p,.choice-set-card p{font-size:14px;color:var(--muted)}
.plan-tasks .eyebrow{font-size:11px;color:#8b2840}
.filter-tab{font-size:13px;color:var(--muted);min-height:44px;padding:9px 12px}
.filter-tab.active{color:white}
.article-toc>button{font-size:13px;color:var(--muted);min-height:44px}
.button,.text-button,.text-link,.download-link,.nav-link,.confidence button{min-height:44px}
.text-button,.text-link,.download-link{display:inline-flex;align-items:center;font-size:13px;line-height:1.7}
.text-button,.confidence button{color:#365b40}
.confidence{flex-wrap:wrap;gap:8px}
.confidence button{font-size:13px;padding:8px 12px}
.confidence button.selected{background:#365b40;color:white;border-color:#365b40}
.icon-button,.player-controls .icon-button{min-width:44px;height:44px}
.focus-pill{min-height:44px;padding:8px 10px;font-size:11px;color:#365b40}
.top-actions .avatar{min-width:44px;height:44px}
.source-internal{min-height:44px}
.confidence>span{font-size:13px;color:var(--muted)}
.nav-link{font-size:13px;color:#54635e}
.nav-link.active{color:var(--teal)}
.answer-button span{font-size:14px}
.page-infographic figcaption{font-size:13px;color:var(--muted)}
.day-plan-strip{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 28px;margin:0 0 24px;border:1px solid #cddbd4;border-left:4px solid #287b65;border-radius:12px;background:#fff}
.day-plan-strip h2{font-size:21px;margin:3px 0 7px}
.day-plan-strip p:not(.eyebrow){font-size:14px;color:var(--muted);margin:0}
.day-plan-strip .eyebrow{font-size:11px;color:#8b2840;margin:0}
.day-plan-strip .button{flex-shrink:0}
.article-jumps{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0;padding:10px 0;background:var(--bg)}
.article-jumps button{min-height:44px;border:1px solid #cddbd4;background:#fff;border-radius:7px;padding:9px 16px;font-size:14px;color:#193f40}
.mobile-contents{display:none}
.question-return{padding:10px 16px;margin-bottom:18px;border-left:3px solid #287b65;background:#edf3ef;border-radius:6px}
.question-return .text-button{font-size:14px;font-weight:600;color:#193f40}
@media(max-width:1000px){
  .article-jumps{position:sticky;top:0;z-index:10}
  .mobile-contents{display:block;margin:0 0 24px;border:1px solid #cddbd4;border-radius:9px;background:#fff}
  .mobile-contents summary{cursor:pointer;padding:12px 16px;min-height:48px;font-size:14px;font-weight:600}
  .mobile-contents>div{display:grid;padding:0 12px 12px;gap:4px}
  .mobile-contents button{min-height:44px;padding:8px 10px;background:none;border:0;text-align:left;font-size:14px;line-height:1.8;color:#365b40}
}
@media(max-width:720px){
  .body-copy{font-size:16px}
  .question-card h3{font-size:17px}
  .article-header h1{font-size:27px;line-height:1.6}
  .filter-tab{font-size:13px;padding:9px 12px}
  .day-plan-strip{align-items:stretch;flex-direction:column;gap:18px;padding:21px 20px}
  .day-plan-strip h2{font-size:20px}
  .day-plan-strip .button{width:100%;font-size:14px}
  .article-jumps{top:62px;margin:18px -20px;padding:9px 20px;border-bottom:1px solid var(--line);flex-wrap:nowrap;gap:6px}
  .article-jumps button{flex:1;min-width:0;padding:9px 7px;font-size:13px}
  .article-main [id]{scroll-margin-top:145px}
  .sidebar{padding-right:20px}
  .sidebar .brand{padding-right:34px;white-space:normal}
  .sidebar-close{width:44px;height:44px;top:8px;right:5px}
  .breadcrumb{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .top-actions{flex-shrink:0}
  body.menu-open{overflow:hidden}
  .confidence button{font-size:13px;padding:8px 10px}
  .page-heading .muted{font-size:13px}
}

/* Bousaiya learning identity — fdma.co.jp black / white / orange.
   Keep the application markup, learning state and reviewed visual assets intact. */
:root{
  --brand:#e66400;
  --brand-text:#b44800;
  --brand-wash:#fff0e4;
  --bg:#faf9f7;
  --paper:#fff;
  --ink:#333;
  --muted:#626262;
  --teal:#000;
  --teal-soft:#f1f1ef;
  --orange:var(--brand-text);
  --cream:var(--brand);
  --line:#deded9;
  --radius:8px;
  --sidebar:256px;
  font-size:16px;
  line-height:1.85;
}
body{background:var(--bg);color:var(--ink)}
h1,h2,h3{color:#000;font-family:'Noto Sans JP',system-ui,sans-serif}
h1{font-size:clamp(30px,3.8vw,48px);font-weight:800;letter-spacing:-.045em;line-height:1.4}
h2{font-weight:800;letter-spacing:-.025em}
h3{font-weight:700;letter-spacing:-.015em}
.eyebrow{font-size:11px;font-weight:800;letter-spacing:.13em;color:var(--brand-text)}
.tiny{font-size:13px;line-height:1.8}
.muted{color:var(--muted)}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:3px solid #b44800;outline-offset:4px;
}
.skip-link{border:2px solid #000;border-radius:4px;color:#000;min-height:44px}
.sidebar{width:var(--sidebar);padding:30px 24px 24px;background:#fff;border-right:1px solid var(--line)}
.brand{gap:12px;align-items:center;min-height:54px;white-space:normal}
.brand img{display:block;height:45px;width:auto;max-width:44px;object-fit:contain;flex-shrink:0}
.brand-copy{min-width:0}
.corporate-brand{font-size:13px;font-weight:800;color:#000;line-height:1.55;letter-spacing:-.025em}
.brand-copy small{font-size:10px;line-height:1.6;color:var(--muted);letter-spacing:.02em}
.brand-mark{display:block;width:auto;height:auto;flex-shrink:0;border-radius:0;background:transparent;color:inherit}
.sidebar-label{font-size:10px;font-weight:700;letter-spacing:.16em;color:#686868;margin:38px 12px 14px}
.nav-link{position:relative;min-height:48px;padding:11px 12px;margin-bottom:5px;border-radius:4px;gap:12px;color:#555;font-size:13px;font-weight:600;line-height:1.65}
.nav-link:hover{background:#f2f2ef;color:#000}
.nav-link.active{background:#000;color:#fff;font-weight:700}
.nav-link.active:before{content:'';position:absolute;inset:11px auto 11px 0;width:3px;background:var(--brand)}
.nav-link .glyph{font-size:23px;color:inherit}
.nav-link small{font-size:11px;background:var(--brand);color:#000;border-radius:3px;padding:1px 6px}
.sidebar-bottom{padding:24px 8px 0;color:var(--muted)}
.sidebar-bottom p{font-size:13px;line-height:1.9;margin-top:16px;color:#555}
.sidebar-bottom>a{min-height:44px;align-items:center;font-size:12px;color:#555}
.small-chip{border-color:#ccc;color:#555;font-size:9px;padding:4px 7px;border-radius:2px}
.corporate-link{border-color:var(--line);color:#333}
.topbar{height:78px;background:#fff;padding:0 44px;gap:16px;border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:#555}
.top-actions{gap:14px}
.today{font-size:12px;color:#666}
.focus-pill{min-height:44px;border:1px solid #d0d0ca;border-radius:4px;background:#fff;color:#333;font-size:12px;padding:8px 12px}
.focus-pill.running{background:var(--brand-wash);border-color:var(--brand);color:#000}
.avatar,.top-actions .avatar{min-width:44px;height:44px;border-radius:50%;background:#000;color:#fff;font-size:13px}
main{max-width:1440px;padding:46px 44px 64px}
.page-heading{gap:26px;margin-bottom:34px;align-items:flex-end}
.page-heading .eyebrow{margin-bottom:14px}
.page-heading h1{max-width:860px;margin-bottom:15px}
.page-heading h1,.article-header h1,.next-card h2,.day-plan-strip h2,.lesson-visual-intro h2{word-break:auto-phrase;overflow-wrap:break-word;text-wrap:balance}
.page-heading .muted{font-size:14px;line-height:1.95;max-width:760px}
.outline-chip{border-color:#bbb;color:#444;border-radius:3px;font-size:12px;padding:8px 12px}
.section-top{margin-bottom:22px;gap:18px}
.section-top h2{font-size:23px;line-height:1.55}
.section-top .eyebrow{font-size:10px;margin-bottom:7px}
.card{padding:28px;border-color:var(--line);border-radius:8px;box-shadow:none}
.button{min-height:48px;padding:12px 20px;gap:18px;border-radius:4px;font-size:14px;font-weight:700;line-height:1.6;transition:background .18s,border-color .18s,color .18s}
.button:hover{transform:none}
.button.primary,.button.cream{background:var(--brand);border-color:var(--brand);color:#000}
.button.primary:hover,.button.cream:hover{background:#ff8222;border-color:#ff8222}
.button.secondary{background:#fff;border-color:#aaa;color:#000}
.button.secondary:hover{border-color:#000;background:#f4f4f1}
.button.subtle{background:#f0f0ec;color:#333;border-color:#deded8}
.button.subtle:hover{background:#e7e7e1}
.button:disabled{opacity:.6}
.text-link,.text-button,.download-link{font-size:13px;line-height:1.75;color:#333;text-decoration:underline;text-underline-offset:4px;min-height:44px}
.text-link:hover,.text-button:hover,.download-link:hover{color:var(--brand-text)}
.day-plan-strip{padding:25px 28px;background:var(--brand-wash);border:1px solid #f2c6a5;border-left:4px solid var(--brand);border-radius:6px;gap:24px;margin-bottom:24px}
.day-plan-strip .eyebrow{font-size:10px;color:var(--brand-text);margin-bottom:6px}
.day-plan-strip h2{font-size:22px;line-height:1.55;margin:0 0 8px}
.day-plan-strip p:not(.eyebrow){color:#555;font-size:14px;line-height:1.9}
.dashboard-grid{grid-template-columns:minmax(0,2.2fr) minmax(250px,1fr);gap:24px}
.next-card{background:#000;border-radius:8px;min-height:315px;border-left:4px solid var(--brand)}
.next-copy{padding:30px 32px;width:100%;max-width:none}
.next-card h2{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:clamp(24px,2.7vw,34px);line-height:1.5;font-weight:800;letter-spacing:-.025em;max-width:680px;margin:20px 0 15px;color:#fff;padding-right:0}
.light-label,.light-label span{font-size:11px;color:#e0e0dc}
.next-copy>p{color:#c9c9c4;font-size:14px;line-height:1.9;max-width:650px;margin-bottom:18px}
.next-meta{font-size:12px;flex-wrap:wrap;gap:12px;color:#d1d1cc;margin-bottom:24px}
.next-card .subject-tag{background:#2a2a27;color:#fff!important;border:1px solid #5b5b53}
.hero-illustration{display:none}
.daily-card{padding:24px}
.daily-card h2{font-size:17px}
.daily-card .section-top{align-items:baseline;margin-bottom:12px}
.daily-card .tiny,.daily-card>.tiny{font-size:12px;color:#666}
.daily-ring{width:154px;height:154px;margin-bottom:14px}
.ring-track{stroke:#eeeeea}
.ring-fill{stroke:var(--brand)}
.daily-ring b{font-size:32px;font-weight:600;color:#000}
.daily-ring #daily-minutes{font-size:32px;font-weight:600;line-height:1.3;color:#000}
.daily-ring b small{font-size:12px;color:#666}
.daily-ring span{font-size:12px;color:#666}
.metric-grid{border:0;border-block:1px solid #bbb;border-radius:0;background:transparent;padding:25px 0;margin:28px 0 42px}
.metric{padding:0 24px;border-color:var(--line)}
.metric>span{font-size:12px;line-height:1.7;color:#555}
.metric strong{font-size:38px;font-weight:600;line-height:1.5;color:#000;letter-spacing:-.035em;margin:8px 0 3px}
.metric strong small{font-size:12px;color:#666;letter-spacing:0}
.metric p{font-size:12px;line-height:1.8;color:#666}
.subject-section{margin-bottom:36px}
.subject-grid,.lesson-grid{gap:20px}
.subject-card,.lesson-card{padding:25px;background:#fff;border-color:var(--line);border-radius:6px;box-shadow:none;transition:border-color .18s,background .18s}
.subject-card:hover,.lesson-card:hover{transform:none;box-shadow:none;border-color:#333;background:#fffefa}
.subject-top{margin-bottom:20px}
.subject-number{font-size:11px;font-weight:600;color:#686868}
.subject-symbol{width:42px;height:42px;border-radius:4px;background:var(--brand-wash);color:#000;font-family:'Noto Sans JP',system-ui,sans-serif;font-size:21px;font-weight:800}
.subject-card h3{font-size:20px;margin-bottom:10px}
.subject-card>p{font-size:13px;line-height:1.9;color:#626262;min-height:5.7em;margin-bottom:24px}
.subject-progress{height:4px;background:#ecece6;border-radius:0;margin-bottom:14px}
.subject-progress>span{background:var(--brand);border-radius:0}
.subject-bottom{font-size:12px;color:#333;line-height:1.8;gap:10px}
.subject-bottom>.muted{color:#666}
.subject-tag{font-size:12px;font-weight:600;background:#f2f2ee;color:#444!important;border:1px solid #e1e1d9;border-radius:3px;padding:3px 9px}
.lesson-card-top{margin-bottom:22px}
.lesson-card h3{font-size:21px;line-height:1.65;margin-bottom:14px}
.lesson-card>p{font-size:14px;line-height:1.9;color:#626262;margin-bottom:25px}
.lesson-card-bottom{font-size:12px;color:#444;padding-top:15px;gap:12px;border-color:var(--line)}
.bottom-grid{gap:24px;grid-template-columns:1.15fr 1fr}
.bottom-grid h2{font-size:21px}
.study-note{background:var(--brand-wash);border:1px solid #f0d7c2;padding-right:28px}
.study-note h2{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:27px;font-weight:800;letter-spacing:-.035em;line-height:1.65}
.study-note>p:not(.eyebrow){font-size:14px;color:#555;max-width:none;line-height:1.95}
.note-icon{display:none}
.weekly-chart{gap:18px}
.chart-day,.chart-value{font-size:12px;color:#626262}
.bar-track{background:#efefea;border-radius:2px;width:22px}
.bar-track>div{background:#d5d5cd;border-radius:2px}
.chart-day.is-today .bar-track>div{background:var(--brand)}
.site-footer{padding:24px 44px;color:#666;font-size:12px;line-height:1.9;border-color:var(--line);flex-wrap:wrap}
.site-footer a{display:inline-flex;align-items:center;min-height:44px;text-decoration:underline;text-underline-offset:4px}
#toast{background:#000;border:1px solid #555;border-radius:5px;font-size:14px;padding:14px 22px;line-height:1.8}
.notice{background:#f3f3ee;border-color:#dddcd3;border-radius:5px;color:#555;font-size:14px;line-height:1.95;padding:20px 22px}
.notice b{color:#222}
.library-tools{gap:20px;margin:26px 0}
.filter-tabs{gap:6px}
.filter-tab{font-size:13px;color:#555;min-height:44px;padding:9px 13px;border:1px solid #d7d7d0;border-radius:3px;background:#fff}
.filter-tab.active{background:#000;border-color:#000;color:#fff}
.search-box{min-height:48px;min-width:240px;border-color:#aaa;border-radius:4px;padding:5px 13px;gap:10px;color:#555}
.search-box:focus-within{border-color:#000;box-shadow:0 0 0 1px #000}
.search-box input,.playlist-tools input[type=search]{font-size:16px;padding:6px 0;min-width:0}
.library-tools+.section-top .tiny{font-size:12px;color:#666;max-width:none}
.article-layout{max-width:1120px;grid-template-columns:minmax(0,1fr) 190px;gap:48px}
.back-link{display:inline-flex;align-items:center;min-height:44px;font-size:13px;color:#555;margin-bottom:24px;text-decoration:underline;text-underline-offset:4px}
.article-header h1{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:clamp(29px,3.2vw,42px);font-weight:800;line-height:1.55;letter-spacing:-.035em;margin:14px 0 20px}
.article-header>.eyebrow{margin-top:22px}
.lead{font-size:17px;line-height:1.95;color:#555;max-width:46em}
.article-meta{gap:8px 15px;font-size:12px;line-height:1.9;color:#626262}
.review-badge{color:#555!important}
.article-jumps{gap:8px;padding:12px 0;margin:27px 0 24px;background:var(--bg)}
.article-jumps button{min-height:46px;padding:10px 18px;border:1px solid #aaa;border-radius:4px;background:#fff;color:#000;font-size:14px;font-weight:700;line-height:1.6}
.article-jumps button:first-child{background:#000;color:#fff;border-color:#000}
.article-jumps button:hover{border-color:#000}
.mobile-contents{border-color:#ccc;border-radius:5px}
.mobile-contents summary{color:#333;font-size:14px}
.mobile-contents button{color:#444;font-size:14px}
.learning-objectives{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:5px;padding:24px 28px;margin:30px 0}
.learning-objectives li{font-size:15px;line-height:1.85;margin:9px 0;padding-left:24px}
.learning-objectives li:before{color:var(--brand-text);font-weight:700}
.part-label{font-size:19px;line-height:1.6;border-bottom:2px solid #000;padding:16px 0;margin:44px 0 15px;gap:14px}
.part-label>span{font-size:30px;font-weight:700;color:var(--brand-text);letter-spacing:-.04em}
.part-label small{font-size:12px;color:#626262;line-height:1.6}
.input-section{padding:30px 0 36px;border-bottom:1px solid var(--line)}
.section-number{font-size:12px;font-weight:700;color:var(--brand-text);letter-spacing:.1em}
.input-section h2{font-size:26px;font-weight:800;line-height:1.6;margin:8px 0 23px;letter-spacing:-.025em}
.body-copy{font-size:16px;line-height:2.1;letter-spacing:.015em;color:#333}
.body-copy p{margin-bottom:20px}
.example-box{background:#fff;border:1px solid var(--line);border-left:3px solid #000;border-radius:0 5px 5px 0;padding:21px 24px;margin:25px 0}
.example-box b{font-size:13px;font-weight:800;color:#000}
.example-box p{font-size:15px;line-height:1.95;margin-top:10px}
.pitfall{background:var(--brand-wash);color:#653d21;border-radius:5px;padding:18px 20px;gap:13px;line-height:1.9}
.pitfall>span{border-color:#bd7b4c;color:#9d3e00;flex-shrink:0;margin-top:3px}
.pitfall b{font-size:13px;font-weight:800;color:#713100}
.pitfall p{font-size:15px;line-height:1.95;color:#61452f;margin-top:6px}
.key-points{background:#fff;border:1px solid var(--line);border-top:4px solid var(--brand);border-radius:5px;padding:28px;margin:34px 0}
.key-points h2{font-size:23px}
.key-points li{font-size:16px;line-height:1.95;margin:10px 0}
.key-points li::marker{color:var(--brand-text)}
.key-points .button{margin-top:14px}
.question-card{padding:30px;background:#fff;border:1px solid #bdbdb5;border-top:3px solid #000;border-radius:6px;margin:26px 0}
.question-label{font-size:11px;line-height:1.8;letter-spacing:.08em;color:#626262;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.question-label small{font-size:12px;color:#666}
.question-card h3{font-size:18px;line-height:1.95;font-weight:600;margin-bottom:20px}
.question-actions{margin-top:26px;gap:12px}
.answer-button{min-height:58px;background:#fff;border:1px solid #999;border-radius:4px;color:#000;font-size:25px;padding:10px 18px;gap:10px}
.answer-button span{font-size:14px;font-weight:700}
.answer-button:not(:disabled):hover{background:var(--brand-wash);border-color:var(--brand-text)}
.feedback{background:#f1f5f0;border:1px solid #c9d7c4;border-radius:5px;padding:23px;font-size:15px;line-height:1.95;color:#333}
.feedback.incorrect{background:var(--brand-wash);border-color:#edc4a4}
.feedback>b{font-size:16px;color:#285235}
.feedback.incorrect>b{color:#8a3700}
.feedback p{line-height:1.95}
.feedback .answer-key{font-size:15px;color:#222}
.feedback .tiny{font-size:13px}
.confidence{border-color:#c9d7c4;margin-top:20px;padding-top:16px;gap:8px}
.confidence>span{font-size:13px;color:#555}
.confidence button{min-height:44px;background:#fff;color:#333;border:1px solid #aaa;border-radius:4px;font-size:13px;padding:8px 12px}
.confidence button.selected{background:#000;color:#fff;border-color:#000}
.question-return{background:var(--brand-wash);border-left:3px solid var(--brand);padding:10px 16px;border-radius:3px;margin-bottom:20px}
.question-return .text-button{color:#333;font-size:14px;font-weight:700}
.sources{font-size:14px;padding-top:36px;color:#555}
.sources h2{font-size:23px}
.sources li{font-size:14px;color:#444;padding:12px 0;line-height:1.9}
.sources li span{font-size:12px;color:#666;margin-top:4px;line-height:1.9}
.sources a,.source-internal{color:#333;text-decoration-thickness:1px;text-underline-offset:4px}
.sources a:hover,.source-internal:hover{color:var(--brand-text)}
.article-toc{border-left:1px solid #ccc;padding-left:22px;margin-top:56px;top:30px}
.article-toc>b{font-size:14px;line-height:1.8;margin-bottom:16px;color:#000}
.article-toc>button{font-size:12px;line-height:1.85;color:#555;min-height:44px;padding:10px 0}
.article-toc>button:hover{color:#000;text-decoration:underline;text-underline-offset:4px}
.toc-note{background:var(--brand-wash);color:#333;border-radius:4px;padding:18px 12px;margin:24px 0}
.toc-note p{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:15px;font-weight:700;line-height:1.8;color:#000;text-wrap:balance}
.toc-note span{font-size:11px;color:#626262;line-height:1.8}
.article-toc .download-link{font-size:12px;margin:8px 0}
.article-next{border-top:1px solid var(--line);padding-top:24px;gap:14px}
.lesson-diagram{background:#fff;border-color:var(--line);border-radius:6px;margin:26px 0}
.lesson-diagram figcaption{font-size:13px;line-height:1.8;color:#626262;padding:13px 16px;flex-wrap:wrap;gap:5px 15px}
.lesson-diagram small{font-size:12px;color:#626262}
.page-infographic{border-color:var(--line);border-radius:6px;padding:25px;background:#fff}
.page-infographic h2{font-size:23px;line-height:1.6}
.page-infographic .button{font-size:14px}
.page-infographic figcaption{font-size:13px;color:#626262}
.page-infographic img{border-radius:3px}
.lesson-visual-intro,.procedure-visual{--visual-ink:#333;--visual-brand:var(--brand-text);--visual-line:var(--line)}
.lesson-visual-intro{background:var(--brand-wash);border-color:#f0d1b8;border-radius:6px}
.lesson-visual-intro h2{font-weight:800}
.visual-kicker{color:var(--brand-text)}
.procedure-route li>span{color:var(--brand-text);border-color:#d0b59f}
.procedure-visual{border-radius:6px;border-color:var(--line)}
.procedure-decisions{background:#f2f2ee}
.procedure-decisions>div{border-radius:4px}
.procedure-decisions>div+div{border-color:var(--brand)}
.procedure-comparison thead th{background:#000}
.procedure-comparison tbody th,.procedure-visual .comparison-common{background:#f3f3ee}
.procedure-comparison th,.procedure-comparison td,.procedure-visual .comparison-common{border-color:var(--line)}
.comparison-note-link{color:var(--brand-text)}
.visual-question-links>a,.visual-question-links>button{color:#333;border-color:#aaa;border-radius:4px}
.visual-question-links>a:hover,.visual-question-links>button:hover{background:var(--brand-wash);border-color:var(--brand-text)}
.visual-question-links>span,.step-label,.hearing-branches strong small{color:#626262}
.period-steps>div,.hearing-branches>div{background:#f3f3ee;border-radius:5px}
.step-arrow,.branch-arrow{color:var(--brand-text)}
.infographic-drawer{border-color:var(--line);border-radius:6px}
.infographic-drawer>summary{color:#333}
.map-subject>.muted,.exam-note>p,.review-intro>p{font-size:14px;line-height:1.95;color:#626262}
.topic-list li{border-color:var(--line)}
.topic-list a,.topic-list li>div{font-size:14px;padding:13px 0;min-height:48px;gap:12px}
.topic-list a{color:#333}
.topic-list a:hover{background:var(--brand-wash)}
.topic-list li>div{color:#737373}
.topic-list small{font-size:11px;color:#626262}
.source-pill{font-size:12px;color:#555;border-color:#ccc;background:#fff;border-radius:3px;padding:6px 10px}
.review-intro>h2{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:30px;font-weight:800;line-height:1.6}
.review-symbol{color:var(--brand-text)}
.session-progress{background:#e4e4dc;height:5px;border-radius:0}
.session-progress>span{background:var(--brand);border-radius:0}
.review-lesson-name{font-size:13px;color:#555;flex-wrap:wrap}
.plan-tasks li{border-color:var(--line)}
.plan-number{background:#000;color:#fff;border-radius:4px;font-weight:700}
.plan-tasks h3{font-size:19px;line-height:1.7}
.plan-tasks p{font-size:14px;color:#626262;line-height:1.9}
.plan-tasks .eyebrow{color:var(--brand-text);font-size:11px}
.understanding-row{font-size:14px;color:#444}
.understanding-row small{font-size:12px;line-height:1.9;color:#626262}
.understanding-bar{background:#e8e8df;height:6px;border-radius:0}
.understanding-bar i{background:var(--brand);border-radius:0}
.revisit-link{border-color:var(--line);border-radius:5px;padding:22px}
.revisit-link:hover{background:var(--brand-wash);border-color:#999}
.revisit-link:focus-visible{outline-color:var(--brand-text)}
.revisit-link h3{font-size:18px;line-height:1.75}
.revisit-link p{font-size:14px;color:#626262}
.revisit-link>span:not(.subject-tag){font-size:12px;color:#626262}
.revisit-link b{font-size:13px;color:#333}
.choice-set-card h3{font-size:20px;line-height:1.7;margin-top:20px}
.choice-set-card p{font-size:14px;color:#626262}
.choice-set-card>span:last-child{font-size:12px;color:#626262;gap:10px;flex-wrap:wrap}
.choice-set-card b{color:#333;font-weight:700}
.choice-set-card:hover{border-color:#333;background:#fffefa}
.choice-stem{font-size:17px;line-height:1.95}
.choice-option{font-size:16px;line-height:1.95;gap:16px;padding:20px;background:#fff;border-color:#bdbdb5;border-radius:5px}
.choice-option>span{background:#f0f0ea;color:#333;border-radius:3px;font-weight:700}
.choice-option>div{min-width:0}
.choice-option:not(:disabled):hover{background:var(--brand-wash);border-color:var(--brand-text)}
.choice-option.right-option{background:#edf4e9;border-color:#9bb68a}
.choice-option.wrong-option{background:var(--brand-wash);border-color:#dba374}
.choice-explanations>div{font-size:15px;line-height:1.95;border-color:var(--line);padding:22px 0}
.written-section>.muted{font-size:14px;color:#626262}
.written-card>p{font-size:16px;line-height:2}
.written-answer{font-size:16px;background:#fff;color:#333;border-color:#aaa;border-radius:4px;padding:15px;line-height:1.9}
.written-solution{font-size:15px;background:#f3f3ed;border:1px solid #d9d9cd;border-radius:5px;line-height:1.95}
.model-answer{font-size:18px;line-height:1.95;font-weight:500}
.criterion{font-size:15px;line-height:1.9;min-height:44px;padding:6px 0}
.criterion input{accent-color:#000;min-width:18px;min-height:18px;margin-top:5px}
.written-solution>.tiny{font-size:13px;color:#626262}
.watch-screen{background:#000;color:#fff;border-radius:7px;padding:28px;min-height:400px}
.watch-screen:after{display:none}
.watch-screen-top,.watch-screen-bottom{font-size:11px;color:#c5c5bd;letter-spacing:.04em;flex-wrap:wrap;line-height:1.8}
.watch-slide h2{font-size:14px;color:#d0d0c8;line-height:1.8}
.watch-caption{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:25px;line-height:1.95;color:#fff}
.speaker-badge{font-size:12px;color:#fff;border-color:#777;border-radius:3px}
.speaker-image{background:#fff;border-color:#d4d4c9}
.visual-note{color:#d0d0c8;font-size:12px}
.icon-button{border-color:#aaa;color:#333;border-radius:4px;min-width:44px;height:44px}
.player-controls{flex-wrap:wrap;gap:12px}
.player-controls label{font-size:13px;color:#555}
.player-controls select{font-size:14px;color:#333;min-height:44px;width:auto}
.player-controls .button,.watch-layout .button-row .button{font-size:13px;min-height:44px}
.watch-playlist{padding:24px 20px}
.watch-playlist h2{font-size:22px}
.playlist-item{min-height:64px;padding:17px 8px;font-size:13px;color:#444;border-color:var(--line)}
.playlist-item.active{background:var(--brand-wash);color:#000;border-radius:3px}
.playlist-item>span:first-child{font-size:11px;color:#626262}
.playlist-item>span:last-child{color:#626262}
.playlist-item b{font-size:13px;font-weight:600;line-height:1.8}
.playlist-item small{font-size:11px;color:#626262;line-height:1.8}
.playlist-subject{font-size:12px;color:#555}
.playlist-subject select{font-size:14px;border-color:#aaa;background:#fff;color:#333;min-height:44px}
.playlist-tools .continuous-video,.continuous-label{font-size:13px;color:#555;line-height:1.8;min-height:44px}
.continuous-label input{accent-color:#000}
.transcript summary{font-size:14px;min-height:44px;cursor:pointer}
.transcript-line{font-size:15px;line-height:1.95;padding:18px 0}
.transcript-line b{font-size:12px;color:#626262}
.transcript-line.current{background:var(--brand-wash)}
.rendered-video video{background:#000;border-radius:5px}
.factory-flow>div,.workflow-roles>div,.team-grid>div{background:#f0f0e9;border-radius:4px}
.factory-flow b,.factory-flow span,.workflow-roles b{font-size:12px;color:#444}
.team-grid h3{font-size:15px;color:#000}
.team-grid p{font-size:13px;line-height:1.9;color:#626262}
.team-grid .glyph{color:var(--brand-text)}
.workflow-status>.muted,.factory-exports>p{font-size:14px;color:#626262}
.workflow-roles span{color:#000}
.workflow-roles small,.workflow-roles p{font-size:11px;color:#626262;line-height:1.8}
.export-list a{font-size:13px;min-height:48px;border-color:var(--line)}
.export-list small{font-size:11px;color:#626262}
.settings-grid p{font-size:15px;line-height:1.95;color:#626262}
.field{font-size:14px;font-weight:600;color:#444;margin:24px 0}
.field input,.field select{font-size:16px;min-height:48px;padding:11px 13px;border-color:#aaa;border-radius:4px;background:#fff;color:#333}
.danger{color:#a22d0b}
.prose h2{font-size:24px;line-height:1.65;margin-top:40px}
.prose>p{font-size:16px;line-height:2;color:#444}
.standalone{background:var(--bg)}
.article-shell{border-radius:6px;border:1px solid var(--line);max-width:860px}
.article-shell h1{font-size:36px;line-height:1.55}
.article-shell ul{font-size:16px;line-height:1.95}
.article-shell aside,.article-shell details{background:#f3f3ed;border-radius:4px}
.article-shell a,.article-shell summary{color:#333}
.article-shell a:hover{color:var(--brand-text)}

@media(max-width:1200px){
  :root{--sidebar:224px}
  .sidebar{padding:26px 17px}
  .brand{gap:10px}
  .brand img{height:42px;max-width:38px}
  .corporate-brand{font-size:12px}
  .brand-copy small{font-size:9px}
  .topbar{padding-inline:30px}
  main{padding:36px 30px 56px}
  .dashboard-grid{grid-template-columns:minmax(0,1fr) 245px;gap:20px}
  .next-copy{padding:27px}
  .daily-card{padding:20px}
  .subject-grid,.lesson-grid{gap:16px}
  .subject-card,.lesson-card{padding:22px}
  .subject-card>p{min-height:7.6em}
  .article-layout{grid-template-columns:minmax(0,1fr) 165px;gap:30px}
  .article-toc{padding-left:18px}
}
@media(max-width:1000px){
  :root{--sidebar:208px}
  .sidebar{padding:26px 14px}
  .brand{gap:9px}
  .brand img{height:39px;max-width:35px}
  .corporate-brand{font-size:11px}
  .brand-copy small{font-size:9px}
  .nav-link{padding:11px 10px;gap:10px;font-size:12px}
  .topbar{height:66px;padding-inline:25px}
  main{padding:32px 25px 52px}
  .page-heading{align-items:flex-start;flex-wrap:wrap}
  .page-heading .button{font-size:13px}
  .dashboard-grid{grid-template-columns:1fr}
  .next-card{min-height:290px}
  .next-copy{padding:29px}
  .next-card h2{font-size:30px;max-width:none}
  .daily-card{display:none}
  .subject-grid,.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric{padding:0 15px}
  .metric strong{font-size:31px}
  .metric>span,.metric p{font-size:11px}
  .article-layout{display:block}
  .article-toc{display:none}
  .article-jumps{top:0;z-index:10}
  .day-plan-strip{align-items:stretch;flex-direction:column;gap:18px;padding:24px}
  .day-plan-strip .button{align-self:flex-start}
  .bottom-grid{grid-template-columns:1fr;gap:22px}
  .site-footer{padding-inline:25px}
  .understanding-row{gap:12px}
  .understanding-row small{font-size:11px}
  .watch-layout{grid-template-columns:1fr}
  .watch-caption{font-size:24px}
}
@media(max-width:720px){
  :root{--sidebar:0px}
  .sidebar{width:268px;max-width:calc(100vw - 32px);padding:30px 21px 24px;box-shadow:none}
  .menu-open .sidebar{box-shadow:12px 0 36px #0002}
  .sidebar .brand{padding-right:30px;gap:10px;min-height:56px}
  .brand img{height:45px;max-width:40px}
  .corporate-brand{font-size:12px;white-space:normal}
  .brand-copy small{font-size:9px}
  .sidebar-label{margin-top:32px}
  .nav-link{font-size:13px;min-height:47px;padding:11px 12px;gap:12px}
  .sidebar-bottom p{font-size:13px}
  .sidebar-close{top:8px;right:7px;min-width:44px;width:44px;height:44px;color:#333}
  .menu-open:after{background:#0005}
  .topbar{height:62px;padding:0 14px;gap:10px;background:#fffffff5;backdrop-filter:blur(8px)}
  .mobile-menu{width:44px;min-width:44px;height:44px;padding:0;font-size:22px;color:#000;background:#fff;border:1px solid #deded8;border-radius:4px}
  .breadcrumb{font-size:12px}
  .top-actions{gap:8px}
  .focus-pill{font-size:11px;padding:8px;min-height:44px;border-radius:4px}
  .top-actions .avatar{min-width:44px;width:44px;height:44px;background:transparent;color:#333;font-size:12px;border:1px solid #deded8;border-radius:4px}
  main{padding:30px 20px 48px}
  .page-heading{margin-bottom:27px;gap:15px}
  .page-heading .eyebrow{font-size:10px;margin-bottom:12px}
  .page-heading h1{font-size:31px;line-height:1.5;letter-spacing:-.04em;margin-bottom:14px}
  .page-heading .muted{font-size:14px;line-height:1.95}
  .card{padding:22px}
  .button{font-size:14px;min-height:48px;padding:12px 17px}
  .section-top{align-items:flex-start;gap:12px;margin-bottom:19px}
  .section-top h2,.section-top>div>h2{font-size:22px;line-height:1.6}
  .section-top>a{font-size:12px}
  .subject-section .section-top{flex-wrap:wrap;gap:0}
  .subject-section .section-top .eyebrow{font-size:10px}
  .day-plan-strip{padding:21px 20px;gap:18px;border-radius:5px}
  .day-plan-strip h2{font-size:22px}
  .day-plan-strip p:not(.eyebrow){font-size:14px}
  .day-plan-strip .button{width:100%;align-self:stretch;font-size:14px}
  .next-card{min-height:0;border-radius:6px}
  .next-copy{width:100%;padding:25px 23px 28px}
  .light-label{font-size:10px;letter-spacing:.12em}
  .light-label span{display:inline;font-size:10px;margin-left:9px}
  .next-card h2{font-size:27px;line-height:1.6;max-width:none;padding-right:0;margin-top:18px}
  .next-copy>p{text-wrap:balance;font-size:14px;line-height:1.9;max-width:none}
  .next-meta{gap:10px;font-size:12px}
  .next-meta .subject-tag{font-size:11px}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 0;padding:24px 0;margin:27px 0 34px}
  .metric{padding:0 18px}
  .metric:nth-child(odd){padding-left:0}
  .metric:nth-child(even){padding-right:0;border:0}
  .metric>span{font-size:12px}
  .metric strong{font-size:35px;margin-top:7px}
  .metric strong small{font-size:11px}
  .metric p{font-size:11px;line-height:1.8}
  .subject-grid,.lesson-grid,.choice-set-grid{grid-template-columns:1fr;gap:15px}
  .subject-card,.lesson-card{padding:23px}
  .subject-top{margin-bottom:13px}
  .subject-symbol{width:39px;height:39px;font-size:19px}
  .subject-card h3{font-size:22px;margin-bottom:8px}
  .subject-card>p{min-height:0;font-size:14px;line-height:1.9;margin-bottom:22px}
  .subject-bottom,.subject-card .subject-bottom{font-size:12px}
  .subject-bottom .muted{display:inline}
  .lesson-card h3{font-size:22px;line-height:1.65}
  .lesson-card>p{font-size:14px;line-height:1.95}
  .lesson-card-bottom{font-size:12px}
  .library-tools{margin:23px 0;gap:17px}
  .filter-tabs{gap:7px}
  .filter-tab{font-size:13px;padding:9px 12px;min-height:44px}
  .search-box{min-width:0;width:100%}
  .library-tools+.section-top{flex-wrap:wrap;gap:8px}
  .library-tools+.section-top .tiny{font-size:12px;max-width:none;text-align:left}
  .bottom-grid{gap:18px}
  .study-note h2{font-size:26px}
  .weekly-chart{gap:12px;padding-inline:0}
  .site-footer{font-size:12px;padding:22px 20px;gap:7px 18px;align-items:center}
  .article-header h1{font-size:30px;line-height:1.6;letter-spacing:-.035em;overflow-wrap:anywhere}
  .article-meta{font-size:12px;gap:5px 12px;line-height:1.9}
  .lead{font-size:16px;line-height:1.95}
  .article-jumps{position:sticky;top:62px;z-index:10;margin:20px -20px 22px;padding:10px 20px;background:var(--bg);border-bottom:1px solid var(--line);gap:6px;flex-wrap:nowrap}
  .article-jumps button{flex:1;min-width:0;min-height:46px;padding:10px 5px;font-size:13px;line-height:1.6}
  .article-main [id]{scroll-margin-top:145px}
  .mobile-contents{margin-bottom:26px}
  .mobile-contents summary{padding:13px 15px;min-height:48px;font-size:14px}
  .mobile-contents>div{padding:0 12px 12px}
  .learning-objectives{padding:22px;margin-top:26px}
  .learning-objectives li{font-size:15px;line-height:1.9}
  .part-label{font-size:18px;gap:11px;margin-top:36px;padding:15px 0}
  .part-label>span{font-size:28px}
  .part-label small{font-size:11px;max-width:120px;line-height:1.7}
  .input-section{padding:26px 0 30px}
  .input-section h2{font-size:24px;line-height:1.65;margin-bottom:21px}
  .body-copy{font-size:16px;line-height:2.05}
  .example-box{padding:19px 20px}
  .example-box p,.pitfall p{font-size:15px;line-height:1.95}
  .pitfall{padding:17px 18px;gap:11px}
  .key-points{padding:24px 22px}
  .key-points li{font-size:16px;line-height:1.95}
  .key-points .button{width:100%}
  .question-card{padding:23px 21px;border-radius:5px}
  .question-card h3{font-size:18px;line-height:1.95}
  .question-label{font-size:11px;gap:5px 10px}
  .question-label small{font-size:11px}
  .answer-button{min-height:58px;padding:11px;gap:8px}
  .feedback{padding:19px 18px;font-size:15px}
  .confidence button{font-size:13px;padding:8px 10px}
  .article-next .button{width:100%}
  .sources li{font-size:14px}
  .sources li span{font-size:12px}
  .page-infographic{margin-inline:-20px;padding:20px;border-radius:0;border-inline:0}
  .page-infographic h2{font-size:22px}
  .page-infographic figcaption{font-size:13px}
  .page-infographic .button-row{gap:9px;align-items:stretch}
  .page-infographic .button-row .button{width:100%}
  .map-subject{padding:22px}
  .topic-list a,.topic-list li>div{font-size:14px;gap:10px}
  .topic-list small{font-size:11px}
  .review-intro{padding:35px 22px}
  .review-intro>h2{font-size:26px}
  .review-intro .button-row .button{width:100%}
  .choice-option{font-size:16px;gap:12px;padding:17px 15px}
  .choice-option>span{width:25px;min-width:25px;height:25px;font-size:12px}
  .choice-exam .section-top{flex-wrap:wrap}
  .written-card>p{font-size:16px}
  .written-solution{padding:20px}
  .model-answer{font-size:18px}
  .written-controls{gap:12px}
  .written-controls .button{width:100%}
  .plan-tasks li{gap:14px;padding-block:23px}
  .plan-tasks h3{font-size:18px;line-height:1.7}
  .plan-number{width:33px;height:36px;min-width:33px}
  .understanding-row{font-size:13px;gap:12px}
  .understanding-row small{font-size:12px;margin-left:0;line-height:1.8}
  .watch-screen{padding:23px 21px;min-height:360px}
  .watch-caption{font-size:22px;line-height:1.95}
  .watch-slide{padding:24px 0}
  .watch-screen-top,.watch-screen-bottom{font-size:10px}
  .speaker-badge{font-size:11px}
  .visual-note{font-size:12px}
  .player-controls{gap:9px}
  .player-controls .button{font-size:13px;min-height:44px;padding:10px 13px}
  .player-controls label{font-size:12px}
  .player-controls select{font-size:14px;width:auto}
  .watch-layout .button-row{gap:10px}
  .watch-layout .button-row .button{font-size:13px}
  .transcript-line{font-size:15px;gap:12px}
  .transcript-line b{font-size:11px}
  .team-grid h3{font-size:14px}
  .team-grid p{font-size:13px}
  .factory-flow{gap:8px}
  .factory-flow>div{padding:13px;min-width:100px}
  .factory-flow b{font-size:12px}
  .settings-grid p{font-size:15px}
  .prose{padding:24px}
  .prose h2{font-size:23px}
  .prose>p{font-size:16px}
  .article-shell{margin:0;padding:30px 22px;border:0;border-radius:0}
  .article-shell h1{font-size:30px}
}
@media(prefers-reduced-motion:reduce){
  .button,.subject-card,.lesson-card,.sidebar{transition:none}
}

/* Bosaier learning room — a reading desk and a reference-book index. */
:root{--bg:#f5f3ee;--line:#d8d5cd}
.brand-english{display:block;font-family:system-ui,sans-serif;font-size:19px;font-weight:700;line-height:1.2;letter-spacing:-.035em;color:#000}
.brand-copy .corporate-brand{font-size:11px;margin-top:4px;letter-spacing:-.02em}
.brand-copy small{font-size:9px;margin-top:3px}
.sidebar{background:#faf9f5}
.sidebar-label{letter-spacing:.04em;font-size:12px}
.small-chip{font-size:10px;letter-spacing:0;border-color:#d3d0c6}
.topbar{background:#faf9f5}
.top-actions .avatar{background:#fff;border:1px solid var(--line)}
.avatar img{display:block;width:auto;height:28px;max-width:28px;object-fit:contain}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.04em;color:#7e3b11}
.page-heading{margin-bottom:27px;align-items:center}
.page-heading .eyebrow{font-size:12px;margin-bottom:10px}
.page-heading h1{font-family:'Noto Serif JP',serif;font-size:32px;font-weight:700;letter-spacing:.015em;line-height:1.6;margin-bottom:12px}
.page-heading .muted{font-size:15px;line-height:1.9}
.outline-chip{font-size:12px;border-radius:0;background:transparent}
.first-reading{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);margin:0 0 34px;border:1px solid #c9c5ba;border-top:3px solid #b44800;background:#fff;box-shadow:0 2px 0 #dedbd2}
.first-reading-main{padding:30px 32px}
.first-reading-main>.eyebrow{font-size:12px;margin-bottom:18px}
.first-reading h2{font-family:'Noto Serif JP',serif;font-size:26px;font-weight:700;letter-spacing:.01em;line-height:1.7;margin-bottom:15px;word-break:auto-phrase;text-wrap:balance}
.first-reading-subtitle{font-size:16px;line-height:1.95;color:#444;margin-bottom:18px}
.first-reading-main ul{font-size:15px;line-height:1.95;color:#555;margin:0 0 24px;padding-left:1.2em}
.first-reading-main li{margin:5px 0}
.first-reading-actions{display:flex;align-items:flex-start;flex-direction:column;gap:8px}
.first-reading-actions .button{font-size:15px;min-height:48px}
.first-reading-side{border-left:1px solid #dedad0;background:#faf9f5;padding:28px}
.first-reading-side h3{font-size:15px;margin:0 0 20px;color:#333}
.reading-route{list-style:none;margin:0;padding:0}
.reading-route li{display:flex;align-items:flex-start;gap:13px;margin-bottom:16px}
.reading-route li>b{font-family:system-ui,sans-serif;font-size:17px;font-weight:500;color:#a24810;min-width:18px;border-bottom:1px solid #bc7b4c;line-height:1.65}
.reading-route strong{font-size:14px;font-weight:700;color:#333;line-height:1.8}
.reading-route p{font-size:13px;line-height:1.9;color:#65615a;margin:3px 0 0}
.entry-question{margin-top:23px;padding-top:19px;border-top:1px solid #c9c5ba}
.entry-question>span{font-size:12px;color:#676159}
.entry-question>p{font-family:'Noto Serif JP',serif;font-size:16px;font-weight:500;line-height:1.95;color:#333;margin:10px 0 7px}
.entry-question .text-link{font-size:13px}
.dashboard-grid{grid-template-columns:minmax(0,1.65fr) minmax(240px,1fr);gap:24px;margin-bottom:26px;align-items:stretch}
.next-card{display:block;min-height:0;background:#fff;color:#333;border:1px solid var(--line);border-radius:0;overflow:visible}
.next-copy{width:auto;max-width:none;display:block;padding:25px 28px}
.light-label,.light-label span{font-size:12px;letter-spacing:0;color:#676159}
.next-card h2{font-family:'Noto Sans JP',system-ui,sans-serif;font-size:21px;font-weight:700;letter-spacing:0;line-height:1.75;color:#222;margin:11px 0 13px;max-width:none;padding:0;text-wrap:balance;word-break:auto-phrase}
.next-copy>p{font-size:14px;line-height:1.95;color:#5b5751;margin-bottom:16px;max-width:none}
.next-meta{font-size:12px;color:#676159;margin:0 0 15px;gap:11px}
.next-card .subject-tag{background:#f2f0e9;color:#444!important;border:1px solid #d9d5cb}
.next-copy>.button{font-size:13px;min-height:44px}
.daily-card{display:flex;justify-content:flex-start;padding:24px;background:#fff;border:1px solid var(--line);border-radius:0}
.daily-card .section-top{margin-bottom:8px;align-items:baseline;flex-wrap:wrap;gap:5px 15px}
.daily-card h2{font-size:17px;letter-spacing:0}
.daily-time{display:flex;align-items:baseline;gap:9px;margin:9px 0 7px;color:#333}
.daily-time strong{font-family:system-ui,sans-serif;font-size:34px;font-weight:500;line-height:1.4}
.daily-time>span{font-size:13px;color:#676159}
.daily-card .tiny{font-size:12px;color:#676159;margin-bottom:18px}
.daily-card .button{margin-top:auto;font-size:13px;padding-inline:12px;min-height:44px}
.day-plan-strip{background:transparent;border:0;border-left:3px solid #b44800;border-radius:0;box-shadow:none;padding:14px 22px;margin-bottom:30px;gap:20px}
.day-plan-strip .eyebrow{font-size:12px;letter-spacing:0;color:#7e3b11;margin-bottom:6px}
.day-plan-strip h2{font-size:20px;font-weight:700;line-height:1.65;margin-bottom:6px}
.day-plan-strip .button{font-size:13px;min-height:44px}
.day-plan-strip p:not(.eyebrow){font-size:14px;color:#676159}
.metric-grid{border-color:#bfb9ad;background:transparent;margin:28px 0 42px;padding:22px 0;box-shadow:none}
.metric strong{font-size:30px;font-weight:500}
.metric p{font-size:12px;line-height:1.9}
.section-top h2,.section-top>div>h2{font-size:22px;font-weight:700;letter-spacing:.01em}
.section-top>div>.eyebrow{font-size:12px;letter-spacing:.04em}
.subject-index{list-style:none;margin:0;padding:0;border-top:2px solid #333;background:#fff}
.subject-index li{border-bottom:1px solid #d6d1c7}
.subject-index a{display:grid;grid-template-columns:38px minmax(0,1fr) 80px;align-items:start;gap:16px;padding:24px 27px;min-height:100px}
.subject-index a:hover{background:#faf7ef}
.subject-index-number{font-family:system-ui,sans-serif;font-size:13px;color:#9e4915;padding-top:7px}
.subject-index h3{font-family:'Noto Serif JP',serif;font-size:21px;font-weight:600;letter-spacing:.02em;line-height:1.7;margin:0 0 7px}
.subject-index p{font-size:14px;color:#676159;line-height:1.95;margin:0;max-width:52em}
.subject-index-count{font-size:13px;text-align:right;line-height:1.9;white-space:nowrap;padding-top:3px}
.subject-index-count>span{display:block;font-size:11px;color:#676159}
.subject-index-count>b{display:block;font-size:18px;font-weight:400;margin-top:6px}
.study-art{position:relative;min-width:0;isolation:isolate;pointer-events:none}
.study-art img{display:block;width:100%;height:100%;object-fit:contain}
.subject-overview{display:grid;grid-template-columns:minmax(0,1fr) 120px;align-items:center;gap:24px;padding:20px 0 25px;margin:0 0 22px;border:0;border-bottom:1px solid #bfb9ad;border-radius:0;box-shadow:none;background:none;overflow:visible}
.subject-overview>div:not(.study-art){order:0}
.subject-overview-art{order:1;height:100px;width:120px;background:none}
.subject-overview-all{display:block}
.subject-overview-all .subject-overview-art{display:none}
.subject-overview .eyebrow{display:none}
.subject-overview h2{font-family:'Noto Serif JP',serif;font-size:23px;font-weight:600;letter-spacing:.01em;line-height:1.7;margin-bottom:10px;word-break:auto-phrase}
.subject-overview p:not(.eyebrow){font-size:15px;line-height:1.95;color:#676159;margin-bottom:11px}
.overview-count{font-size:12px;color:#676159}
.overview-count>span{display:none}
.library-tools{border-bottom:1px solid #d6d1c7;padding-bottom:20px}
.lesson-grid{display:block;border-top:2px solid #333;background:#fff}
.lesson-card{display:block;padding:24px 28px;border:0;border-bottom:1px solid #d6d1c7;border-radius:0;box-shadow:none;transition:background .15s}
.lesson-card:hover{background:#faf7ef;border-color:#d6d1c7;box-shadow:none}
.lesson-card-top{margin-bottom:11px}
.lesson-card-top>.tiny{font-size:12px}
.lesson-card h3{font-size:20px;font-weight:600;letter-spacing:0;line-height:1.75;margin-bottom:11px;word-break:auto-phrase}
.lesson-card>p{font-size:15px;line-height:1.95;color:#676159;max-width:64em;margin-bottom:13px}
.lesson-card-bottom{border:0;padding:0;min-height:30px;font-size:12px;color:#676159}
.lesson-card-bottom>span:last-child{font-size:13px;color:#333}
.card,.review-intro,.study-note,.revisit-link{border-radius:2px;box-shadow:none;background-image:none}
.study-note{background:#f4eee2;border-color:#d5c9b5}
.study-note h2{font-family:'Noto Serif JP',serif;font-size:23px;font-weight:600;letter-spacing:.01em;line-height:1.7}
.study-note>p:not(.eyebrow){font-size:14px;line-height:1.95;color:#676159}
.bottom-grid h2{font-size:20px}
.review-intro{position:relative;background:#fff;padding:35px 30px}
.review-intro-art{width:150px;height:100px;margin:0 auto 16px}
.review-intro>h2{font-family:'Noto Serif JP',serif;font-size:25px;font-weight:600;letter-spacing:.01em;line-height:1.7;word-break:auto-phrase;text-wrap:balance}
.review-intro>p{max-width:580px;margin-inline:auto;font-size:15px;line-height:1.95}
.plan-note-art{display:none}
.plan-tasks h3{font-size:18px;font-weight:600;line-height:1.8;word-break:auto-phrase}
.revisit-link{background:#fff}
.revisit-link:hover{background:#faf7ef}
.article-header h1{font-size:34px;line-height:1.65;letter-spacing:0}
.article-toc .eyebrow{letter-spacing:.04em}
.infographic-drawer{margin-top:34px;background:#fff;border-radius:2px}
.infographic-drawer>summary{font-size:14px;line-height:1.8;padding:16px 20px;min-height:48px}
.feedback.correct,.session-complete{animation:none}
@media(max-width:1200px){
  .first-reading-main{padding:27px}
  .first-reading-side{padding:25px}
  .first-reading h2{font-size:24px}
  .dashboard-grid{grid-template-columns:minmax(0,1.4fr) minmax(230px,1fr)}
}
@media(max-width:1000px){
  .brand-english{font-size:18px}
  .brand-copy .corporate-brand{font-size:10px}
  .brand-copy small{font-size:8px}
  .first-reading{grid-template-columns:1fr}
  .first-reading-main{padding:27px}
  .first-reading-side{padding:24px 27px;border-left:0;border-top:1px solid #dedad0}
  .dashboard-grid{grid-template-columns:1fr}
  .daily-card{display:flex}
  .subject-overview{grid-template-columns:minmax(0,1fr) 100px;gap:20px}
  .subject-overview-art{height:90px;width:100px}
  .subject-overview-all{display:block}
}
@media(max-width:720px){
  .brand-english{font-size:19px}
  .brand-copy .corporate-brand{font-size:11px}
  .brand-copy small{font-size:8px}
  .topbar{background:#faf9f5f5}
  .page-heading h1{font-size:27px;line-height:1.7;letter-spacing:0}
  .page-heading .eyebrow{font-size:12px}
  .page-heading .muted{font-size:15px}
  .page-heading{margin-bottom:24px}
  .first-reading{margin-bottom:28px}
  .first-reading-main{padding:23px 21px 25px}
  .first-reading h2{font-size:23px;line-height:1.75;text-wrap:balance}
  .first-reading-subtitle{font-size:15px;line-height:1.95}
  .first-reading-main ul{font-size:14px;line-height:1.95;margin-bottom:20px}
  .first-reading-actions .button{width:100%;font-size:14px}
  .first-reading-actions .text-link{font-size:13px}
  .first-reading-side{padding:22px 21px 24px}
  .reading-route p{font-size:13px}
  .entry-question>p{font-size:16px;line-height:1.95}
  .dashboard-grid{margin-bottom:22px;gap:20px}
  .next-copy{padding:22px}
  .next-card h2{font-size:20px;line-height:1.8;margin:10px 0 12px}
  .next-copy>.button{width:100%}
  .next-copy>p{font-size:14px}
  .daily-card{padding:22px}
  .day-plan-strip{padding:12px 0 12px 18px;gap:14px;margin-bottom:28px}
  .day-plan-strip h2{font-size:20px}
  .day-plan-strip .button{width:100%;font-size:13px}
  .metric-grid{gap:22px 0;margin-top:27px;margin-bottom:35px}
  .metric strong{font-size:29px}
  .subject-index a{grid-template-columns:24px minmax(0,1fr);gap:7px 12px;padding:22px 18px}
  .subject-index h3{font-size:20px}
  .subject-index p{font-size:14px;line-height:1.95}
  .subject-index-count{grid-column:2;display:flex;align-items:center;gap:14px;text-align:left;padding:4px 0 0;font-size:12px}
  .subject-index-count>span{font-size:11px}
  .subject-index-count>b{margin:0 0 0 auto;font-size:18px}
  .subject-overview{grid-template-columns:minmax(0,1fr) 80px;gap:14px;padding-top:12px}
  .subject-overview-art{height:75px;width:80px}
  .subject-overview-all{display:block}
  .subject-overview h2{font-size:22px}
  .subject-overview p:not(.eyebrow){font-size:14px}
  .lesson-card{padding:22px}
  .lesson-card h3{font-size:20px}
  .lesson-card>p{font-size:15px;line-height:1.95}
  .review-intro{padding:28px 22px}
  .review-intro>h2{font-size:23px}
  .article-header h1{font-size:27px;line-height:1.7}
  .article-jumps{background:var(--bg)}
}