:root{--ink:#17232d;--muted:#60717d;--paper:#fbfcfd;--sheet:#fff;--line:#d8e0e5;--navy:#142b3c;--navy2:#1d4158;--red:#b74645;--gold:#bd8528;--gold-soft:#f3e6c9;--blue-soft:#e9f0f4}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#edf1f3;color:var(--ink);font-family:"BIZ UDPGothic","Yu Gothic UI",Meiryo,sans-serif;line-height:1.75}.topbar{position:sticky;top:0;z-index:20;background:rgba(20,43,60,.96);color:#fff;border-top:4px solid var(--gold);box-shadow:0 4px 18px rgba(17,35,48,.18)}.topbar-inner{max-width:1240px;margin:auto;min-height:62px;padding:9px 22px;display:flex;align-items:center;gap:18px}.brand{font-family:"Yu Mincho",serif;font-weight:700;letter-spacing:.04em}.brand small{display:block;font-family:inherit;color:#d9bd82;font-size:10px;letter-spacing:.12em}.topbar a{color:#fff;text-decoration:none}.back{margin-left:auto;border:1px solid #6f8290;padding:6px 11px;font-size:12px}.shell{max-width:1240px;margin:0 auto;padding:28px 22px 64px}.hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.7fr);background:var(--navy);color:#fff;border-left:7px solid var(--gold);box-shadow:0 18px 45px rgba(20,43,60,.15)}.hero-copy{padding:34px 38px}.eyebrow{color:#e4b55f;font-size:11px;font-weight:800;letter-spacing:.14em}.hero h1{font-family:"Yu Mincho",serif;font-size:clamp(28px,4vw,48px);line-height:1.25;margin:5px 0 12px}.hero p{margin:0;color:#c9d7df}.hero-stats{border-left:1px solid #3a5263;padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:#324958}.stat{background:var(--navy);padding:16px}.stat strong{display:block;color:#f4d390;font-size:26px}.stat span{font-size:11px;color:#bac9d2}.panel{background:var(--sheet);border:1px solid var(--line);margin-top:18px;padding:24px;box-shadow:0 8px 28px rgba(33,52,64,.06)}.panel h2{font-family:"Yu Mincho",serif;font-size:24px;margin:0 0 14px}.matrix{width:100%;border-collapse:collapse}.matrix th,.matrix td{border:1px solid var(--line);padding:12px;text-align:center}.matrix th{background:var(--navy);color:#fff;font-size:12px}.matrix th:first-child{background:#253c4c}.matrix td:first-child{font-family:"Yu Mincho",serif;font-size:20px;font-weight:700;background:#f5f7f8}.matrix a{display:block;padding:8px 7px;background:var(--blue-soft);border-bottom:3px solid var(--gold);color:var(--ink);text-decoration:none;font-weight:700}.matrix a:hover{background:var(--gold-soft)}.year-spine{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.year-spine a{background:var(--sheet);border:1px solid var(--line);border-top:4px solid var(--gold);padding:18px 10px;text-align:center;text-decoration:none;color:var(--ink)}.year-spine strong{display:block;font-family:"Yu Mincho",serif;font-size:25px}.year-spine span{font-size:11px;color:var(--muted)}.routes{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.route{border:1px solid var(--line);padding:16px;background:#fafbfc}.route b{display:block;color:var(--navy);font-family:"Yu Mincho",serif;font-size:19px}.route p{font-size:12px;color:var(--muted);margin:5px 0 0}.year-head{display:flex;align-items:end;gap:18px;margin-bottom:18px}.year-head h1{font-family:"Yu Mincho",serif;font-size:clamp(30px,4vw,46px);margin:0}.year-head p{margin:0 0 8px;color:var(--muted)}.subject-nav{position:sticky;top:66px;z-index:10;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--navy);padding:5px;box-shadow:0 8px 24px rgba(20,43,60,.14)}.subject-nav a{color:#fff;text-decoration:none;text-align:center;padding:11px 6px;font-weight:700}.subject-nav a:hover{background:var(--navy2)}.subject{scroll-margin-top:130px;background:var(--sheet);border:1px solid var(--line);margin-top:18px}.subject-head{display:flex;align-items:center;gap:14px;padding:19px 22px;background:var(--navy);color:#fff;border-left:6px solid var(--gold)}.subject-head h2{font-family:"Yu Mincho",serif;font-size:27px;margin:0}.subject-head p{margin:0;color:#bac9d2;font-size:12px}.source-actions{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}.source-actions a{background:#fff;color:var(--navy);text-decoration:none;padding:7px 9px;font-size:11px;font-weight:800}.prose{padding:22px 28px 38px;max-width:1000px}.prose>h1{display:none}.prose h2{font-family:"Yu Mincho",serif;font-size:25px;border-bottom:2px solid var(--navy);padding-bottom:6px;margin:32px 0 13px}.prose h3{font-size:18px;color:var(--navy);border-left:4px solid var(--gold);padding-left:10px;margin:25px 0 9px}.prose p{margin:9px 0}.prose li{margin:5px 0}.prose code{background:#eef2f4;border:1px solid #dce3e7;padding:1px 4px}.prose pre{background:#17232d;color:#e7eef2;padding:16px;overflow:auto;line-height:1.55}.prose blockquote{margin:15px 0;padding:12px 16px;background:#fff7e7;border-left:5px solid var(--gold)}.table-scroll{overflow:auto;margin:13px 0}.prose table{width:100%;border-collapse:collapse;min-width:560px}.prose th,.prose td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}.prose th{background:#eaf0f3;color:var(--navy)}.footer{padding:26px 0;color:var(--muted);font-size:12px;text-align:center}.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:10px;z-index:50;background:#fff;color:#000;padding:8px}@media(max-width:800px){.shell{padding:14px 10px 42px}.hero{grid-template-columns:1fr}.hero-copy{padding:26px 22px}.hero-stats{border-left:0;border-top:1px solid #3a5263}.year-spine{grid-template-columns:repeat(2,1fr)}.routes{grid-template-columns:1fr 1fr}.matrix th,.matrix td{padding:6px}.matrix a{font-size:11px}.year-head{display:block}.subject-nav{top:63px}.subject-head{display:block}.source-actions{margin:10px 0 0}.prose{padding:17px 16px 28px}.prose h2{font-size:22px}}@media(max-width:480px){.routes{grid-template-columns:1fr}.subject-nav a{font-size:12px}.hero-stats{grid-template-columns:1fr 1fr}}

:root{--lesson-paper:#fffdf7;--lesson-accent:#29715c}
.lesson-intro{padding:20px;background:var(--lesson-paper);border-left:4px solid var(--lesson-accent);margin:18px 0}.lesson-intro h2{margin:0 0 8px}.lesson-map{width:100%;border-collapse:collapse;min-width:620px}.lesson-map td,.lesson-map th{border:1px solid #d8e0e5;padding:9px;text-align:left;vertical-align:top}.lesson-map a{display:inline-block;margin:3px 7px 3px 0;color:#205747}.lesson-card{scroll-margin-top:140px;border:1px solid #d9ded4;background:var(--lesson-paper);padding:22px;margin:24px 0}.lesson-card h3{margin:5px 0 14px!important}.lesson-unit{font-size:12px;color:#426353}.lesson-question{background:#f0f2ee;padding:14px;line-height:1.9}.lesson-approach{border-left:4px solid #29715c;padding:8px 14px}.lesson-card details,.pattern details{border:1px solid #d9ded4;margin:9px 0;background:white}.lesson-card summary,.pattern summary{cursor:pointer;min-height:46px;padding:11px 14px;font-weight:700;color:#214d43}.lesson-card details>div,.pattern details>div{padding:0 17px 16px}.lesson-card details[open]>summary{border-bottom:1px solid #e5e7de;margin-bottom:12px}.lesson-card li{margin:12px 0;line-height:1.95}.lesson-card .answer{background:#e9f2e8;border-left:4px solid #29715c;padding:13px}.lesson-card .mistake{border-left:4px solid #b77c33;padding:9px 13px;background:#fff6e9}.lesson-card .transfer{padding:13px;background:#eaf0f5}.lesson-evidence{padding:10px 14px;background:#fff3ce}.lesson-evidence a{color:#244d5f}.lesson-tools{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:18px;font-size:13px}.lesson-tools select{font:inherit;padding:8px;border:1px solid #adb8ad;background:white}.lesson-diagram{max-width:650px;margin:16px 0}.lesson-diagram svg{display:block;width:100%;height:auto;background:#fff;border:1px solid #ddd}.lesson-diagram figcaption{font-size:12px;color:#536b60}.pattern-nav{display:flex;gap:8px;flex-wrap:wrap}.pattern-nav a{border:1px solid #bdcdbf;padding:7px 11px;text-decoration:none;color:#214d43;background:#f6f8ef}.pattern{scroll-margin-top:95px;margin:18px 0;padding:22px;border:1px solid #d6ded5;background:#fffdf7}.pattern h2{margin:0 0 8px}.pattern li{margin:12px 0}.lesson-count{font-size:13px;color:#536b60}.lesson-card a:focus-visible,summary:focus-visible,select:focus-visible{outline:3px solid #b87816;outline-offset:3px}@media(max-width:600px){.lesson-card{padding:14px;margin:18px 0}.lesson-map{font-size:13px}.lesson-tools{align-items:flex-start}.lesson-unit{overflow-wrap:anywhere}}@media print{.topbar,.subject-nav,.lesson-tools{display:none}.lesson-card{break-inside:auto}.lesson-card details{display:block}.lesson-card summary{color:black}.lesson-card details>div{display:block}.lesson-card{scroll-margin:0}.prose{max-width:none}}

/* Learning flow blocks are prose, not dark source-code panels. */
.prose pre{background:#f5f4ed;color:#17232d;border:1px solid #c8d2ca;border-left:4px solid #29715c;padding:16px;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.85;font-family:inherit;max-width:100%}
.prose pre code{display:block;background:transparent;color:inherit;border:0;padding:0;white-space:inherit;overflow-wrap:inherit;font:inherit}
.prose :not(pre)>code{color:#17232d;background:#eef2f4}
.prose pre::selection,.prose pre code::selection{background:#b8d9c6;color:#102a20}
.prose h2,.prose h3{scroll-margin-top:140px}

#knowledge,[id^="year-"]{scroll-margin-top:95px}
.knowledge-section{scroll-margin-top:140px}.knowledge-scroll{overflow:auto;max-height:560px;border:1px solid #ccd5cf;margin:12px 0;isolation:isolate}.knowledge-table{border-collapse:separate;border-spacing:0;width:100%;min-width:1030px;font-size:13px}.knowledge-table th,.knowledge-table td{padding:10px;border-right:1px solid #dce2dc;border-bottom:1px solid #dce2dc;text-align:left;vertical-align:top;color:#17232d;background:#fffdf7}.knowledge-table thead th{position:sticky;top:0;z-index:3;background:#edf2e9}.knowledge-table tr>:first-child{position:sticky;left:0;z-index:2;min-width:235px;max-width:265px;background:#f3f4ed}.knowledge-table thead tr>:first-child{z-index:4}.knowledge-table td{min-width:150px}.knowledge-table a{color:#205747;display:inline-block;margin:3px 5px 3px 0}.knowledge-table small{display:block;color:#536452;font-weight:400}.knowledge-count{display:block;font-weight:bold}.knowledge-link{padding:3px 6px;border:1px solid #c6d5c7;border-radius:3px;text-decoration:none;background:#f0f5ec}.knowledge-empty{color:#68736a}.knowledge-legend{font-size:13px;color:#536452}.knowledge-filter{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.knowledge-filter input,.knowledge-filter select{font:inherit;padding:9px;max-width:100%;border:1px solid #a5b7a8;background:white;color:#17232d}.knowledge-filter input{width:320px}.knowledge-detail{padding:18px;border:1px solid #c6d5c7;background:#fffdf7;margin:14px 0;scroll-margin-top:140px}.knowledge-detail h2{margin-top:0}.knowledge-detail p{overflow-wrap:anywhere}.knowledge-detail .knowledge-chain{background:#edf3e9;padding:14px;border-left:4px solid #29715c}.knowledge-related{display:flex;gap:7px;flex-wrap:wrap}.knowledge-related a{color:#205747;padding:5px;border:1px solid #c6d5c7}.knowledge-system{border:1px solid #c6d5c7;background:#f5f7ef;margin:14px 0;padding:12px}.knowledge-system summary{cursor:pointer;font-weight:bold}.knowledge-system li{margin:8px 0}.knowledge-anchor{display:block;scroll-margin-top:140px}.year-knowledge td,.year-knowledge th{vertical-align:top;text-align:left;padding:8px;border-bottom:1px solid #dce2dc}.year-knowledge{width:100%;border-collapse:collapse}.year-knowledge a{color:#205747}.year-knowledge small{display:block;color:#536452}.topic-occurrence{border-top:1px solid #dce2dc;padding:12px 0}.topic-occurrence h3{font-size:17px}.knowledge-section[hidden],tr[hidden]{display:none!important}@media(max-width:600px){.knowledge-table tr>:first-child{min-width:175px;max-width:195px}.knowledge-scroll{max-height:500px}.knowledge-detail{padding:12px}.knowledge-table{font-size:12px}.year-knowledge{font-size:13px}}@media print{.knowledge-scroll{max-height:none;overflow:visible}.knowledge-table{min-width:0;font-size:9px}.knowledge-table td{min-width:0}.knowledge-table tr>:first-child{position:static;min-width:0}.knowledge-filter{display:none}}