:root{color-scheme:light;--ink:#303c36;--muted:#666c61;--green:#3b6253;--paper:#fffef9;--bg:#f4f2e9;--line:#d9ddcf;--serif:"Hiragino Mincho ProN","Yu Mincho","YuMincho",serif;--sans:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-family:var(--sans);color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.9}a{color:var(--green);text-underline-offset:5px;text-decoration-thickness:1px}a:hover{color:#223f33}button,input{font:inherit}button{cursor:pointer;color:var(--green);background:var(--paper);border:1px solid #a8b4a4;border-radius:4px;padding:7px 14px;min-height:44px}button:hover{background:#edf1e7}button:disabled{cursor:default}a,button,summary,input{touch-action:manipulation}:focus-visible{outline:3px solid #b07833;outline-offset:5px}main:focus{outline:none}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.65}h1,h2{font-family:var(--serif);font-weight:600}h1{font-size:clamp(29px,3vw,40px);letter-spacing:.04em}h2{font-size:26px}h3{font-size:18px}p{margin-bottom:1.2em}strong{font-weight:650}.small{font-size:13px;color:var(--muted);line-height:1.9}.eyebrow{font-size:11px;letter-spacing:.17em;color:var(--green);font-weight:600;margin-bottom:16px}.skip-link{position:fixed;top:-100px;left:16px;background:#fff;padding:12px;z-index:10}.skip-link:focus{top:12px}.library-header{height:88px;max-width:1200px;margin:auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 36px}.brand{display:flex;gap:12px;align-items:center;font:23px Georgia,serif;text-decoration:none;letter-spacing:.02em}.brand b{font-weight:400}.brand-symbol{font-size:28px}.shelf-link{font-size:12px;text-decoration:none}.shelf-link span{margin-left:16px}.breadcrumb{display:flex;gap:12px;flex-wrap:wrap;max-width:1128px;margin:24px auto 32px;font-size:11px;color:var(--muted);padding:0 2px}.breadcrumb a{color:var(--muted);text-decoration:none}.book-layout{max-width:1128px;margin:auto}.book-opening{display:grid;grid-template-columns:1.15fr 1fr;gap:60px;align-items:center;padding:38px 64px 70px;position:relative}.opening-copy h1{font-size:42px;line-height:1.8;margin:16px 0 22px;letter-spacing:.09em}.opening-copy h1 span{font-size:.92em}.hero-sub{font-family:var(--serif);font-size:19px;line-height:1.9;margin-bottom:18px}.hero-description{font-size:14px;color:var(--muted);line-height:2}.primary-link{display:inline-flex;justify-content:space-between;gap:30px;background:var(--green);color:#fffef5;padding:13px 22px;font-size:14px;border-radius:3px;text-decoration:none;box-shadow:0 3px 0 #28483d;margin:8px 0 17px}.primary-link:hover{background:#2d5143;color:white}.edition{font-size:11px;color:var(--muted);line-height:1.9;margin:5px 0 0}.resume-link{display:block;font-size:12px;margin-bottom:16px}.large-cover{position:relative;max-width:336px;width:100%;aspect-ratio: .7;justify-self:center;background:linear-gradient(90deg,#adb6a0,#d9dfcb 12px,#bcc5ae 17px,#e6e9d9 27px,#e6e9d9);border:1px solid #acb79c;border-radius:3px 7px 7px 3px;box-shadow:3px 4px 0 #c6c4b0,8px 8px 0 #fffdf0,9px 9px 0 #c6c4b0,17px 24px 40px #33433319;transform:rotate(2deg);padding:32px 25px 24px 40px;display:flex;align-items:center;flex-direction:column;color:#455745}.large-cover:before{content:"";position:absolute;inset:14px 13px 14px 26px;border:1px solid #a7b199;pointer-events:none}.cover-imprint{font:9px Georgia,serif;letter-spacing:.2em;margin-bottom:24px}.cover-series{font-size:10px;letter-spacing:.25em;margin-bottom:15px}.cover-title{font-family:var(--serif);font-size:25px;line-height:1.8;letter-spacing:.09em}.cover-art{width:90%;height:auto;max-height:184px;margin:7px 0}.cover-bottom{text-align:center;font-size:9px;letter-spacing:.12em;margin-top:auto;line-height:2.1}.cover-bottom span{font:7px Georgia,serif;letter-spacing:.14em}.start-section{padding:35px 40px 40px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#ecefe4}.start-section h2{font-size:25px;margin-bottom:22px}.phase-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.phase-grid a{display:block;background:var(--paper);padding:22px 24px;text-decoration:none;border:1px solid #d5dbca;border-radius:3px;transition:transform .15s}.phase-grid a:hover{transform:translateY(-3px)}.phase-grid a>span{font:10px Georgia,serif;letter-spacing:.12em;color:var(--muted)}.phase-grid h3{font-family:var(--serif);font-size:20px;margin:12px 0 7px}.phase-grid p{font-size:12px;color:var(--muted);margin:0 0 16px}.phase-grid b{font-size:12px;font-weight:500}.introduction{display:grid;grid-template-columns:.85fr 1.25fr;gap:55px;padding:62px 48px;border-bottom:1px solid var(--line)}.introduction h2{font-size:26px}.introduction p:not(.eyebrow){font-size:15px;line-height:2.2}.introduction p:last-child{margin-bottom:0}.rules-section,.all-chapters,.faq-section{padding:48px}.rule-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin:26px 0}.rule-grid>div{border-left:2px solid #bcc9b5;padding-left:18px}.rule-grid h3{margin:10px 0}.rule-grid p{font-size:13px;line-height:2}.all-chapters{background:#eeeee4;border-block:1px solid var(--line)}.section-title{display:flex;justify-content:space-between;align-items:center}.section-title>span{font-size:12px;color:var(--muted)}.chapters-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.chapter-card{display:flex;align-items:center;gap:16px;text-decoration:none;padding:21px 0;border-top:1px solid #cfd6c6}.chapter-card .toc-no{font:26px Georgia,serif;color:#718371}.chapter-card>span:nth-child(2){flex:1;min-width:0}.chapter-card small{display:block;font-size:10px;color:var(--muted);margin-bottom:3px}.chapter-card strong{font-size:14px;line-height:1.8;font-weight:500}.appendix-links{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}.appendix-links a{border:1px solid #c4cdba;padding:18px 22px;text-decoration:none;background:#f8f8ef}.appendix-links span,.appendix-links strong,.appendix-links small{display:block}.appendix-links span{font-size:10px;color:var(--muted)}.appendix-links strong{font-family:var(--serif);font-size:19px;margin:6px 0}.appendix-links small{font-size:12px}details{border-block-end:1px solid var(--line);padding:16px 0}summary{cursor:pointer;min-height:44px;display:list-item;align-content:center;padding:6px 4px;color:var(--green);line-height:1.8}details>p{padding:10px 4px 0;font-size:14px}.faq-section h2{margin-bottom:20px}.reader-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start}.book-index{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;padding:18px 4px}.index-title{font-family:var(--serif);font-size:16px;text-decoration:none;display:block;line-height:1.8;margin-bottom:28px}.index-title span{font-family:var(--sans);font-size:10px;letter-spacing:.15em;display:block;color:var(--muted);margin-bottom:5px}.toc{list-style:none;margin:0;padding:0}.toc li{border-bottom:1px solid #dce0d3}.toc a{display:flex;align-items:center;gap:12px;padding:11px 8px;text-decoration:none;font-size:12px;min-height:44px;border-left:2px solid transparent}.toc a span{font:15px Georgia,serif;color:#7f8c79}.toc a[aria-current=page]{border-left-color:var(--green);background:#e5eadc;font-weight:600}.toc-extra{display:flex;flex-direction:column;gap:10px;margin-top:22px}.toc-extra a{font-size:11px;min-height:32px;text-decoration:none}.index-foot{font-family:var(--serif);font-size:13px;color:#6d7868;margin-top:35px}.page-column{min-width:0}.paper{background:var(--paper);border:1px solid #dce0d0;border-radius:2px 5px 5px 2px;padding:26px 56px 20px;box-shadow:3px 3px 0 #e9e9de,5px 5px 0 #d9ddcf,0 9px 26px #34413206;position:relative}.paper:before{content:"";position:absolute;left:6px;top:0;bottom:0;border-left:1px solid #edece1;pointer-events:none}.running-head{display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:15px;font-size:10px;color:var(--muted)}.running-head a{color:var(--muted);text-decoration:none}.chapter-head{padding-top:34px}.chapter-number{display:block;color:#85967b;font:64px Georgia,serif;line-height:1.2;margin-bottom:10px}.chapter-head h1{font-size:32px;line-height:1.8;margin:0 0 22px;letter-spacing:.02em}.lead{font-size:16px;line-height:2.1;color:#5e685a}.reader-tools{display:flex;align-items:center;justify-content:space-between;border-block:1px solid var(--line);padding:8px 0;margin:25px 0;color:var(--muted);font-size:11px}.reader-tools button{font-size:12px;min-height:40px;padding:5px 12px;border:0;background:#eef1e7}.key-point{background:#edf2e6;border-left:3px solid #839c79;padding:20px 23px;margin-bottom:42px}.key-point>span{font-size:11px;letter-spacing:.07em;color:var(--green)}.key-point p{font-size:16px;line-height:1.9;margin:7px 0 0;font-weight:500}.prose{font-size:16px;line-height:2.1;overflow-wrap:break-word}.prose h2{font-size:23px;margin:44px 0 18px;line-height:1.8;padding-bottom:11px;border-bottom:1px solid var(--line);letter-spacing:.02em}.prose h2:first-child{margin-top:0}.prose h3{font-size:17px;line-height:1.9;margin-bottom:10px}.prose p{margin-bottom:1.4em}.prose p:last-child{margin-bottom:0}.prose a{font-size:.92em}.note{background:#f2f3e9;border-left:3px solid #9daf8c;padding:22px 24px;margin:30px 0;font-size:15px;line-height:2}.note h3{font-family:var(--serif);font-size:19px;margin:7px 0 12px}.note p:last-child{margin-bottom:0}.note-label{font-size:11px;letter-spacing:.08em;color:#596950;display:block;font-weight:600}.note.law{background:#edf1e9;border-color:#69896a}.note.guide,.note.model{background:#f7f1e4;border-color:#bda170}.note.guide .note-label,.note.model .note-label{color:#7c633a}.example{padding:22px 24px;background:#f7f4eb;border:1px solid #dedccd;border-radius:3px;margin:28px 0;font-size:15px;line-height:2}.example .note-label{margin-bottom:10px}.example p:last-child{margin-bottom:0}.reading-list{margin:24px 0}.reading-list>div{display:grid;grid-template-columns:145px 1fr;gap:20px;border-bottom:1px solid var(--line);padding:18px 0}.reading-list dt{font-size:14px;color:var(--green);font-weight:600}.reading-list dd{margin:0;font-size:15px;line-height:1.95}.check-list{list-style:none;padding:0;margin:22px 0}.check-list li{position:relative;padding:11px 0 11px 28px;font-size:15px;line-height:1.95;border-bottom:1px solid #e3e5da}.check-list li:before{content:"✓";position:absolute;left:2px;color:#668660}.steps{padding-left:27px}.steps li{padding:9px 0 14px 7px;line-height:1.9;font-size:15px}.steps li::marker{color:#698766}.steps strong{display:block;margin-bottom:4px}.material{padding:24px 0;border-bottom:1px solid var(--line)}.material h3{color:var(--green);margin:0 0 14px}.material p:last-child{margin-bottom:0}.equation{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;padding:24px 16px;background:#edf1e5;border:1px solid var(--line);font-size:15px;margin:28px 0}.equation b{font-weight:400;color:#73836a}.equation strong{color:var(--green)}.template{border:1px solid #ccd5c0;padding:20px;background:#f7f8f0;border-radius:4px;margin:25px 0}.template-header{display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:12px;margin-bottom:14px}.template-header button{font-size:12px}.template-text{white-space:pre-line;font-size:14px;line-height:2.1;user-select:text}.copy-status:empty{display:none}.contact-card{background:#edf2e5;border:1px solid #cbd6be;padding:28px;margin:25px 0}.contact-card h3{font-family:var(--serif);font-size:21px;margin:14px 0}.phone{font:52px Georgia,serif;text-decoration:none;display:inline-block;margin:0 0 17px}.phone span{font:14px var(--sans)}.contact-card p{font-size:15px}.closing h3{font-family:var(--serif)}.chapter-sources{margin-top:42px;border-top:1px solid var(--line);font-size:13px}.source-list{list-style:none;padding:0;margin:15px 0}.source-list li{border-bottom:1px solid var(--line);padding:18px 0;overflow-wrap:anywhere}.source-list li:last-child{border:0}.source-type{display:block;font-size:10px;color:var(--muted);letter-spacing:.07em;margin-bottom:5px}.source-list a{font-size:14px}.source-list p{font-size:12px;line-height:1.9;color:var(--muted);margin:8px 0 0}.page-end{display:flex;justify-content:space-between;font:10px Georgia,serif;color:#79816e;letter-spacing:.1em;padding-top:24px}.page-turn{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0 20px}.page-turn a{display:flex;flex-direction:column;justify-content:center;background:#e8ecdf;border:1px solid #d4dccb;padding:20px 24px;min-height:92px;text-decoration:none;font-size:14px}.page-turn a:last-child{text-align:right}.page-turn span{font-size:10px;margin-bottom:5px;color:var(--muted)}.chapter-note{font-size:11px;color:var(--muted);line-height:1.9;padding:0 8px}.mobile-toc{display:none}.site-footer{max-width:1128px;margin:65px auto 0;padding:36px 24px 46px;border-top:1px solid var(--line);text-align:center;font-size:12px;color:var(--muted)}.site-footer>a:first-child{font-family:var(--serif);font-size:15px;text-decoration:none}.site-footer p{margin:8px 0}.checklist-paper{padding-top:40px}.check-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:25px 0 12px;padding:15px;background:#ecf1e4}.check-tools p{margin:0;font-size:14px}.check-tools button{font-size:12px}.check-group{margin:36px 0}.check-group h2{font-size:23px;margin-bottom:5px}.check-group>p{font-size:12px;margin:0 0 15px}.check-group ul{list-style:none;padding:0;margin:0}.check-group li{border-bottom:1px solid var(--line)}.check-group label{display:flex;align-items:flex-start;gap:14px;padding:15px 2px;cursor:pointer;font-size:15px;line-height:1.9;min-height:48px}.check-group input{width:20px;height:20px;accent-color:var(--green);flex-shrink:0;margin-top:5px}.check-group input:checked+span{color:#68765f;text-decoration:line-through;text-decoration-color:#9bab90}.large-text .prose{font-size:19px}.large-text .prose :is(p,dd,li){font-size:18px}.large-text .prose h2{font-size:26px}.large-text .key-point p,.large-text .lead{font-size:18px}
@media(min-width:1450px){.book-layout,.breadcrumb,.site-footer{max-width:1200px}.reader-layout{grid-template-columns:260px minmax(0,1fr);gap:48px}.paper{padding-left:70px;padding-right:70px}.book-opening{padding-inline:86px;gap:85px}}
@media(max-width:1180px){.book-layout,.breadcrumb{margin-left:26px;margin-right:26px}.reader-layout{grid-template-columns:215px minmax(0,1fr);gap:24px}.paper{padding-left:34px;padding-right:34px}.book-opening{padding-inline:32px;gap:32px}.opening-copy h1{font-size:36px}.large-cover{max-width:300px}.cover-title{font-size:23px}}
@media(max-width:850px){.library-header{height:72px;padding:0 24px}.book-index{display:none}.reader-layout{display:block;max-width:760px;margin:auto;padding:0 24px}.mobile-toc{display:block;margin:0 0 18px;padding:9px 16px;border:1px solid var(--line);background:#ecf0e3;border-radius:3px}.mobile-toc>summary{font-size:13px;min-height:36px}.mobile-toc .toc a{font-size:14px}.paper{padding:22px 38px}.book-opening{gap:28px;padding-inline:8px}.opening-copy h1{font-size:31px}.large-cover{max-width:265px;padding:27px 19px 20px 32px}.cover-title{font-size:21px}.cover-imprint{margin-bottom:17px}.cover-art{max-height:145px}.cover-series{font-size:9px}.phase-grid{gap:10px}.phase-grid a{padding:18px 15px}.phase-grid h3{font-size:18px}.start-section,.rules-section,.all-chapters,.faq-section{padding:30px 24px}.introduction{gap:30px;padding:38px 24px}.introduction h2{font-size:23px}.chapter-card{gap:10px}.chapter-card strong{font-size:13px}.chapters-grid{gap:0 20px}}
@media(max-width:600px){body{font-size:16px}.library-header{height:65px;padding:0 20px}.brand{font-size:19px;gap:8px}.brand-symbol{font-size:24px}.shelf-link{font-size:11px}.shelf-link span{margin-left:6px}.breadcrumb{font-size:10px;gap:7px;margin:19px 20px 24px}.book-layout{margin:0 20px}.book-opening{grid-template-columns:1fr;gap:38px;padding:14px 10px 46px}.opening-copy h1{font-size:34px;line-height:1.75;margin:12px 0 23px}.hero-sub{font-size:18px}.hero-description{font-size:14px}.large-cover{max-width:243px;margin:0 0 7px;aspect-ratio:.7}.cover-title{font-size:20px}.cover-imprint{font-size:8px;margin-bottom:15px}.cover-art{max-height:128px}.cover-bottom{font-size:8px}.cover-bottom span{font-size:6px}.start-section,.rules-section,.all-chapters,.faq-section{padding:28px 0}.start-section{padding:26px 18px}.start-section h2{font-size:21px}.phase-grid{grid-template-columns:1fr;gap:12px}.phase-grid a{padding:17px 20px}.phase-grid h3{font-size:20px;margin-top:5px}.phase-grid p{margin:0 0 8px}.phase-grid b{display:block}.introduction{display:block;padding:38px 4px 32px}.introduction h2{font-size:25px;margin-bottom:25px}.introduction p:not(.eyebrow){font-size:15px;line-height:2.1}.rules-section h2,.all-chapters h2,.faq-section h2{font-size:23px}.rule-grid{grid-template-columns:1fr;gap:18px}.rule-grid>div{padding-left:18px}.rule-grid h3{margin:6px 0}.rule-grid p{font-size:14px;margin-bottom:0}.all-chapters{background:none}.chapters-grid{grid-template-columns:1fr}.chapter-card{gap:16px;padding:18px 0}.chapter-card strong{font-size:15px}.chapter-card small{font-size:11px}.appendix-links{grid-template-columns:1fr}.reader-layout{padding:0;margin:0 12px}.paper{padding:20px 23px 22px}.paper:before{left:4px}.chapter-head{padding-top:27px}.chapter-head h1{font-size:28px;line-height:1.8}.chapter-number{font-size:54px}.lead{font-size:16px;line-height:2}.running-head{font-size:9px}.reader-tools{margin-block:22px}.key-point{padding:17px 18px;margin-bottom:33px}.key-point p{font-size:15px}.prose{font-size:16px;line-height:2}.prose h2{font-size:22px;line-height:1.8;margin-top:36px}.note,.example{padding:18px;line-height:2;font-size:15px}.note h3{font-size:18px}.reading-list>div{grid-template-columns:1fr;gap:7px;padding:16px 0}.reading-list dt{font-size:15px}.reading-list dd{font-size:15px}.check-list li,.steps li{font-size:15px}.steps{padding-left:22px}.equation{flex-direction:column;gap:7px}.template{padding:16px}.template-header{align-items:flex-start;flex-direction:column;gap:10px}.template-text{font-size:14px}.contact-card{padding:20px}.contact-card h3{font-size:19px}.page-turn{gap:10px}.page-turn a{padding:16px 14px;font-size:13px}.site-footer{margin-top:38px;font-size:11px}.site-footer>a:first-child{font-size:13px}.checklist-paper{padding-top:30px}.checklist-paper h1{font-size:30px}.check-group label{font-size:15px}.check-tools{flex-wrap:wrap}.check-tools p{font-size:13px}.large-text .prose :is(p,dd,li){font-size:18px}.large-text .prose h2{font-size:24px}}
@media(max-width:350px){.book-layout{margin-inline:14px}.reader-layout{margin-inline:8px}.paper{padding-inline:18px}.opening-copy h1{font-size:29px}.chapter-head h1{font-size:25px}.library-header{padding-inline:16px}.brand{font-size:17px}.key-point,.note,.example{padding:15px}.reader-tools{font-size:10px}.reader-tools button{font-size:11px}.prose h2{font-size:21px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{@page{size:A4;margin:18mm}body{background:white;color:#111;font-size:11pt}.library-header,.breadcrumb,.book-index,.mobile-toc,.reader-tools,.page-turn,.site-footer,.check-tools button,.skip-link,.chapter-note{display:none!important}.book-layout,.reader-layout{display:block;margin:0;padding:0;max-width:none}.paper{border:0;box-shadow:none;padding:0}.paper:before{display:none}.check-group{break-inside:avoid;margin:22px 0}.check-group label{padding:7px 0;font-size:10pt}.check-group input{appearance:none;border:1px solid #555;width:13px;height:13px}.check-group input:checked{background:#555;print-color-adjust:exact}.check-tools{background:none;border-bottom:1px solid #aaa;padding:10px 0}.note,.example{break-inside:avoid}.prose{font-size:11pt}.prose h2{font-size:17pt}.source-list{font-size:9pt}a{color:#111}h1,h2,h3{break-after:avoid}p{orphans:3;widows:3}}

.stage-shortcut{display:block;font-size:12px;margin:0 0 13px}#start-title{scroll-margin-top:24px}
