@charset "UTF-8";
@import url("/assets/fonts/notebook/notebook.css?v=notebook-20261027");
:root{--paper:#fcfcfa;--ink:#161616;--muted:#595959;--line:#d9d9d4;--green:#161616;--lime:#f1f1ec;--white:#fff;--panel:#f1f1ec;--marker:#ffe45c;--head:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--body:"BIZ UDPGothic","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.8}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--green)}button{cursor:pointer}button:disabled{cursor:default}img,svg{max-width:100%}::selection{background:var(--lime)}.wrap{width:min(1180px,calc(100% - 88px));margin-inline:auto}.skip{position:absolute;top:-100px;left:20px;background:var(--green);color:white;padding:12px;z-index:20}.skip:focus{top:12px}.header{border-bottom:1px solid var(--line);background:var(--paper)}.header .wrap{height:93px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:800;letter-spacing:.04em}.brand-icon{width:36px;height:40px}.brand small{font-size:10px;letter-spacing:.15em;color:var(--muted);font-weight:500;border-left:1px solid var(--line);padding-left:14px;margin-left:8px}.nav{display:flex;align-items:center;gap:30px;font-size:13px}.nav a:hover{color:var(--green)}.nav .nav-about{border:1px solid var(--line);padding:7px 15px;border-radius:4px}.eyebrow{font:11px var(--mono);letter-spacing:.14em;color:var(--green);display:flex;align-items:center;gap:9px}.eyebrow:before{content:"";width:6px;height:6px;background:var(--green);border-radius:50%}.hero{padding:66px 0 63px;display:grid;grid-template-columns:1.08fr 1fr;gap:55px;align-items:center}.hero h1{font-size:clamp(36px,4.5vw,61px);line-height:1.4;letter-spacing:-.045em;margin:23px 0 21px;font-weight:750}.hero h1 em{font-style:normal;color:var(--green)}.hero p{color:var(--muted);font-size:14px;line-height:2.2;max-width:450px}.hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;justify-content:center;align-items:center;gap:22px;padding:11px 20px;border:1px solid var(--green);border-radius:4px;font-size:13px;font-weight:600;background:var(--green);color:white}.btn:hover{background:#000}.btn.secondary{background:transparent;color:var(--green);border-color:var(--line)}.btn.secondary:hover{background:var(--lime)}.hero-note{font:11px var(--mono);color:var(--muted);margin-top:19px}.illustration{min-height:340px;position:relative;padding:25px;background:radial-gradient(circle at 1px 1px,#c7d3c6 1px,transparent 0);background-size:18px 18px;border:1px solid var(--line);border-radius:6px;overflow:hidden}.ill-top{display:flex;justify-content:space-between;align-items:center;font:10px var(--mono);letter-spacing:.14em;color:var(--muted)}.ill-label{background:var(--lime);padding:5px 9px;border-radius:3px;color:var(--green)}.ill-canvas{height:236px;display:flex;align-items:center;justify-content:center;position:relative}.ill-node{position:absolute;background:var(--paper);border:1px solid #bccabf;padding:9px 13px;border-radius:4px;min-width:96px;box-shadow:3px 3px 0 #dae4d5;font:11px var(--mono)}.ill-node span{display:block;color:var(--muted);font:9px var(--mono);margin-top:4px}.ill-input{left:3%;top:48px}.ill-output{right:1%;bottom:41px}.ill-core{width:111px;height:111px;border:1px solid var(--green);border-radius:19px;background:var(--green);color:var(--lime);display:flex;align-items:center;justify-content:center;flex-direction:column;transform:rotate(-6deg);box-shadow:8px 8px 0 #dce8cb;position:relative;z-index:2}.ill-core svg{width:44px;height:44px}.ill-core b{font:13px var(--mono);letter-spacing:.13em;margin-top:9px}.wire{position:absolute;width:72%;height:124px;left:14%;top:57px;border:1px dashed #849b89;border-radius:16px}.wire:after{content:"";position:absolute;width:8px;height:8px;background:var(--green);border-radius:50%;bottom:-4px;right:50px}.ill-caption{position:absolute;bottom:72px;left:3%;font:9px var(--mono);letter-spacing:.1em;color:var(--muted)}.ill-footer{border-top:1px solid #c9d5c7;padding-top:13px;display:flex;justify-content:space-between;gap:10px;font-size:10px;color:var(--muted)}.intro-strip{display:flex;justify-content:space-between;gap:26px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0;font-size:12px}.intro-strip strong{font-weight:600}.intro-strip span{color:var(--muted);font:10px var(--mono);margin-right:9px}.section{padding-top:60px;scroll-margin-top:25px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:25px}.section-title h2{font-size:28px;letter-spacing:-.03em;margin:8px 0 0}.section-title p{font-size:12px;color:var(--muted);margin:0}.featured{display:grid;grid-template-columns:1.5fr 1fr;gap:20px}.feature-card{padding:30px 32px;background:#e8edde;border:1px solid #ced9c5;border-radius:5px;display:grid;grid-template-columns:1fr 155px;gap:20px;align-items:center;min-height:230px;transition:border-color .15s}.feature-card:hover{border-color:var(--green)}.tag{font:10px var(--mono);letter-spacing:.06em;color:var(--green);display:inline-block;padding:4px 9px;background:#f1f1ec;border-radius:3px}.feature-card .tag{background:var(--paper)}.feature-card h3{font-size:23px;line-height:1.65;letter-spacing:-.025em;margin:16px 0 12px}.feature-card p{color:var(--muted);font-size:12px;line-height:1.9;margin:0}.feature-card .go{font-size:11px;margin-top:20px;color:var(--green)}.mini-flow{border:1px solid #b6c6ae;background:#f2f5eb;border-radius:5px;padding:20px 14px;text-align:center;font:11px var(--mono)}.mini-flow div{background:white;border:1px solid #d0daca;padding:8px;border-radius:3px}.mini-flow span{display:block;color:#7b9477;margin:5px}.feature-secondary{background:white;border:1px solid var(--line);border-radius:5px;padding:27px 29px;display:flex;flex-direction:column;justify-content:center}.feature-secondary h3{font-size:21px;line-height:1.6;margin:13px 0}.feature-secondary p{font-size:12px;color:var(--muted);margin:0}.feature-secondary .go{margin-top:19px;font-size:11px;color:var(--green)}.feature-secondary:hover{border-color:var(--green)}.filters{display:flex;gap:7px;flex-wrap:wrap}.filter{border:1px solid var(--line);background:transparent;border-radius:3px;padding:6px 14px;color:var(--muted);font-size:12px}.filter[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.filter:hover{border-color:var(--green)}.catalog-controls{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:24px}.search{display:flex;align-items:center;border-bottom:1px solid #aebcaf;gap:7px;color:var(--muted);width:230px}.search input{width:100%;border:0;background:none;padding:9px 0;color:var(--ink);font-size:12px;min-width:0}.search svg{width:15px;flex-shrink:0}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.article-card{background:white;border:1px solid var(--line);border-radius:5px;overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,border-color .15s}.article-card[hidden]{display:none}.article-card:hover{border-color:var(--green);transform:translateY(-3px)}.card-art{height:135px;background:#f1f1ec;display:flex;justify-content:center;align-items:center;border-bottom:1px solid var(--line);position:relative;overflow:hidden}.card-art:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 49%,#bcc8b5 50%,transparent 51%),linear-gradient(transparent 49%,#bcc8b5 50%,transparent 51%);background-size:24px 24px;opacity:.2}.card-art svg{width:160px;height:94px;position:relative}.card-body{padding:23px;display:flex;flex-direction:column;flex:1}.card-body h3{font-size:17px;line-height:1.75;margin:13px 0 10px;letter-spacing:-.02em}.card-body p{font-size:12px;color:var(--muted);line-height:1.9;margin:0 0 20px}.card-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;margin-top:auto}.card-meta span:last-child{color:var(--green)}.search-status{font-size:12px;color:var(--muted);margin-top:18px}.tools-section{margin-top:65px;padding:34px 38px;background:var(--ink);color:white;border-radius:5px;display:grid;grid-template-columns:1fr 1.65fr;gap:35px}.tools-section .eyebrow{color:var(--lime)}.tools-section 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.brand{font-size:19px}.footer-links{display:flex;gap:20px;font-size:11px;color:var(--muted)}.footer-bottom{margin-top:24px;display:flex;justify-content:space-between;color:var(--muted);font:10px var(--mono);letter-spacing:.03em}.breadcrumb{font-size:11px;color:var(--muted);margin:32px 0}.breadcrumb a:hover{text-decoration:underline}.article-hero{max-width:860px;padding:15px 0 39px}.article-hero h1{font-size:40px;line-height:1.55;letter-spacing:-.035em;margin:19px 0}.article-hero .lead{font-size:16px;color:var(--muted);max-width:780px;line-height:2}.article-hero .article-meta{color:var(--muted);font-size:11px;display:flex;gap:20px;margin-top:25px}.reading-layout{display:grid;grid-template-columns:minmax(0,780px) 240px;gap:70px;border-top:1px solid var(--line);padding-top:40px}.prose{font-size:15px;line-height:2.05;min-width:0}.prose h2{font-size:24px;line-height:1.65;letter-spacing:-.025em;margin:43px 0 20px;padding-top:5px}.prose h2:first-child{margin-top:0}.prose h3{font-size:18px;line-height:1.8;margin:30px 0 12px}.prose p{margin:17px 0}.prose a:not(.btn){color:var(--green);text-decoration:underline;text-underline-offset:4px}.prose ul,.prose ol{padding-left:23px}.prose li{margin:8px 0}.prose code{font:13px var(--mono);background:#f1f1ec;padding:3px 5px;border-radius:3px;overflow-wrap:anywhere}.prose pre{overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--ink);color:#f1f1ec;padding:25px;border-radius:5px;line-height:1.8;font:12px/1.9 var(--mono)}.prose pre code{background:none;padding:0;color:inherit;line-height:inherit;font-size:inherit}.callout{border-left:3px solid var(--green);background:#f1f1ec;padding:15px 23px;margin:24px 0;font-size:14px}.callout p{margin:8px 0}.toc{position:sticky;top:35px;align-self:start;border-top:2px solid var(--green);padding-top:17px;font-size:11px}.toc strong{font:11px var(--mono);letter-spacing:.1em}.toc ul{padding:0;list-style:none;margin-top:18px}.toc li{margin:15px 0;color:var(--muted);line-height:1.8}.toc a:hover{color:var(--green)}.toc .toc-note{border-top:1px solid var(--line);padding-top:18px;margin-top:23px;color:var(--muted)}.demo{border:1px solid #bacab4;border-radius:5px;padding:27px;background:white;margin:28px 0}.demo-header{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:17px}.demo-header strong{font-size:15px}.demo-header .tag{font-size:9px}.demo .hint{font-size:11px;color:var(--muted);line-height:1.8;margin:11px 0}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.demo label{display:block;font-size:12px;line-height:1.8}.demo input,.demo select,.demo textarea{display:block;width:100%;padding:10px 12px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:3px;margin-top:5px;font-size:13px}.demo textarea{min-height:92px;resize:vertical}.demo input[type=range]{padding:0;border:none;accent-color:var(--green);margin:18px 0}.demo-output{margin-top:21px;border-top:1px solid var(--line);padding-top:20px;line-height:1.8}.demo-output strong.result{display:block;font:32px var(--mono);color:var(--green);margin:6px 0}.demo-output .result-label{font-size:11px;color:var(--muted)}.demo button{margin-top:16px}.demo pre{margin-bottom:0}.bar-row{display:grid;grid-template-columns:85px 1fr 48px;gap:10px;align-items:center;margin-top:10px;font:12px var(--mono)}.bar-track{height:13px;background:var(--paper);border-radius:2px;overflow:hidden}.bar-fill{height:100%;background:var(--green);width:0;transition:width .15s}.diagram{padding:25px;border:1px solid var(--line);background:#f1f1ec;border-radius:5px;display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin:25px 0;font-size:12px}.diagram b{font-weight:500;border:1px solid #c2cdbb;background:white;padding:13px 17px;border-radius:3px}.diagram span{color:var(--green)}.table-wrap{overflow:auto;margin:24px 0}table{border-collapse:collapse;width:100%;font-size:12px;line-height:1.9}th,td{padding:12px 16px;border:1px solid var(--line);text-align:left;min-width:120px}th{background:#f1f1ec}.sources{margin-top:43px;padding:25px 0;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.sources h2{font-size:17px;margin:0 0 15px}.sources li{line-height:1.8;margin:10px 0}.related{margin-top:60px;padding-top:35px;border-top:1px solid var(--line)}.related h2{font-size:21px}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.related a{border:1px solid var(--line);padding:22px;border-radius:4px;background:white;font-size:13px}.related a:hover{border-color:var(--green)}.related small{display:block;font-size:10px;color:var(--muted);margin-bottom:9px}.plain-page{max-width:780px;padding-bottom:60px}.plain-page h1{font-size:38px;margin:30px 0}.back-home{display:inline-block;margin-top:30px;font-size:13px;color:var(--green)}.noscript-note{font-size:12px;color:var(--muted)}
@media(min-width:1500px){.hero{padding-block:85px}.hero h1{font-size:64px}}
@media(max-width:1000px){.wrap{width:calc(100% - 48px)}.brand small{display:none}.hero{gap:28px}.hero h1{font-size:43px}.illustration{padding:18px;min-height:320px}.ill-node{padding:7px;min-width:80px}.feature-card{grid-template-columns:1fr}.feature-card .mini-flow{display:none}.reading-layout{grid-template-columns:minmax(0,1fr) 190px;gap:35px}.article-hero h1{font-size:34px}.tools-section{gap:20px}.card-body{padding:20px}}
@media(max-width:740px){.wrap{width:calc(100% - 36px)}.header .wrap{height:77px;gap:16px}.brand{font-size:21px;gap:8px}.brand-icon{width:27px}.nav{gap:15px;font-size:11px}.nav .nav-about{display:none}.hero{grid-template-columns:1fr;padding:40px 0 30px;gap:27px}.hero h1{font-size:43px;margin:19px 0}.hero p{font-size:13px}.hero-buttons{margin-top:23px}.illustration{min-height:288px;padding:18px}.ill-canvas{height:206px}.ill-caption{bottom:65px}.ill-input{left:4%;top:31px}.ill-output{right:4%;bottom:26px}.wire{top:39px}.intro-strip{flex-wrap:wrap;gap:8px 20px;font-size:10px;padding:15px 0}.intro-strip span{font-size:9px}.section{padding-top:39px}.section-title{align-items:start;gap:12px}.section-title h2{font-size:24px}.section-title p{font-size:10px;margin-top:24px}.featured{grid-template-columns:1fr;gap:14px}.feature-card{grid-template-columns:1fr 110px;padding:23px;gap:16px;min-height:auto}.feature-card .mini-flow{display:block;padding:15px 8px;font-size:9px}.feature-card h3{font-size:20px}.feature-secondary{padding:23px}.feature-secondary h3{font-size:18px}.catalog-controls{flex-direction:column;align-items:stretch;gap:12px}.search{width:100%}.filter{padding:6px 12px;font-size:11px}.article-grid{grid-template-columns:1fr 1fr;gap:12px}.card-art{height:110px}.card-art svg{width:120px}.card-body{padding:16px}.card-body h3{font-size:14px}.card-body p{font-size:11px}.card-meta{font-size:9px}.tools-section{grid-template-columns:1fr;padding:26px;margin-top:40px;gap:16px}.editor-note{grid-template-columns:1fr;gap:12px;padding:27px 0}.footer-top{align-items:start;gap:18px}.footer-links{flex-direction:column;gap:7px;font-size:10px}.footer-bottom{font-size:9px;gap:20px}.article-hero{padding:3px 0 24px}.article-hero h1{font-size:29px}.article-hero .lead{font-size:14px}.article-hero .article-meta{font-size:10px;gap:12px}.reading-layout{display:flex;flex-direction:column-reverse;gap:27px;padding-top:25px}.toc{position:static;border-top:0;background:#eef1e7;padding:18px 21px}.toc ul{display:grid;grid-template-columns:1fr 1fr;gap:9px 15px;margin-bottom:0}.toc li{margin:0}.toc .toc-note{display:none}.prose{font-size:14px}.prose h2{font-size:21px}.demo{padding:20px}.demo-header{align-items:start}.demo-header strong{font-size:14px}.field-grid{gap:12px}.demo label{font-size:11px}.demo input{padding:10px 8px}.diagram{padding:18px;gap:9px}.diagram b{padding:9px 11px;font-size:11px}.related-grid{grid-template-columns:1fr}.plain-page h1{font-size:30px}.feature-card p{font-size:11px}}
@media(max-width:390px){.hero h1{font-size:37px}.article-grid{grid-template-columns:1fr}.card-art{height:125px}.feature-card{grid-template-columns:1fr}.feature-card .mini-flow{display:none}.nav{gap:10px}.field-grid{grid-template-columns:1fr}.bar-row{grid-template-columns:65px 1fr 42px;gap:6px}.ill-node{font-size:10px;min-width:72px}.ill-core{width:97px;height:97px}}
.lab-banner{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:35px;margin-top:38px;border:1px solid #c9d7bc;border-radius:5px;background:#e8edde}.lab-banner h2{font-size:28px;line-height:1.6;margin:14px 0}.lab-banner p{color:var(--muted);font-size:13px;line-height:2}.lab-banner .btn{margin-top:12px}.lab-preview{align-self:center;background:var(--ink);color:white;border-radius:5px;padding:20px 24px}.lab-preview-top{display:flex;justify-content:space-between;font:9px var(--mono);letter-spacing:.08em;color:#becfb8;border-bottom:1px solid #416053;padding-bottom:15px}.lab-preview pre{font:12px/2.1 var(--mono);white-space:pre-wrap;margin:22px 0}.lab-preview code span{color:var(--lime)}.lab-preview p{color:#bccdb7;font-size:10px;line-height:1.9;margin-bottom:0}.news-description{font-size:12px;line-height:2;color:var(--muted);margin:0 0 18px}.news-list{border-top:1px solid var(--line)}.news-row{display:grid;grid-template-columns:150px 1fr 18px;gap:22px;align-items:center;padding:19px 0;border-bottom:1px solid var(--line)}.news-row:hover h3{color:var(--green)}.news-source{font-size:11px;color:var(--green)}.news-source time{display:block;font:10px var(--mono);color:var(--muted);margin-top:4px}.news-row h3{font-size:14px;line-height:1.8;font-weight:500;margin:0;overflow-wrap:anywhere}.news-arrow{color:var(--green);font-size:13px}.news-status,.news-empty{font-size:11px;color:var(--muted);line-height:1.8;margin-top:18px}.lab-launch{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 15px}.lab-page .hint{font-size:12px;color:var(--muted)}.lab-lessons{counter-reset:lessons;list-style:none;padding:0!important}.lab-lessons li{border-top:1px solid var(--line);padding:20px 0 16px 45px;position:relative}.lab-lessons li:before{counter-increment:lessons;content:counter(lessons,decimal-leading-zero);position:absolute;left:0;top:21px;color:var(--green);font:15px var(--mono)}.lab-lessons p{font-size:13px;color:var(--muted);margin:8px 0!important}
@media(max-width:740px){.lab-banner{grid-template-columns:1fr;gap:20px;padding:24px;margin-top:25px}.lab-banner h2{font-size:24px}.lab-preview{padding:18px 20px}.news-row{grid-template-columns:85px 1fr 13px;gap:12px;padding:16px 0}.news-row h3{font-size:12px}.news-source{font-size:10px}.news-source time{font-size:9px}.news-section .section-title{display:block}.news-section .section-title p{margin-top:12px}.lab-launch{display:flex;flex-direction:column;align-items:stretch}.lab-launch .btn{font-size:12px;gap:10px;text-align:center}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

.news-entry{border-bottom:1px solid var(--line)}.news-entry .news-row{border-bottom:0;padding-bottom:10px}.news-explanation{margin-left:172px;padding:0 28px 22px 0}.news-summary{font-size:13px;line-height:2;margin:0 0 15px}.news-explanation details{border:1px solid var(--line);border-radius:4px;padding:12px 17px;background:white}.news-explanation summary{cursor:pointer;color:var(--green);font-size:12px}.news-explanation dl{font-size:12px;line-height:2}.news-explanation dt{font-weight:600;color:var(--green);margin-top:15px}.news-explanation dd{margin:5px 0 0}.news-provenance,.news-original{color:var(--muted);font-size:10px;line-height:1.9;margin:12px 0 0}.news-original{overflow-wrap:anywhere}@media(max-width:740px){.news-explanation{margin-left:0;padding:0 0 20px}.news-entry .news-row{padding-bottom:10px}.news-summary{font-size:12px}.news-explanation details{padding:12px 14px}}

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@media(max-width:740px){.reading-layout{align-items:stretch}.reading-layout>.prose,.reading-layout>.toc{width:100%}}

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/* Article-specific diagrams; labels reflow instead of shrinking on phones. */
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/* Catalog / learning redesign — 20261013 */

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.learning-reading-path{padding-block:48px}.learning-reading-path>p{max-width:760px;color:#3a3a38;line-height:1.8}.learning-reading-path .learning-tool-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}.learning-reading-path .learning-tool-links a{overflow-wrap:anywhere}
@media(max-width:760px){.learning-reading-path{padding-block:36px}.learning-reading-path .learning-tool-links{grid-template-columns:1fr}}

/* Content-led reading layout — 2026-10-22 */
.header .wrap{min-height:76px;gap:24px;justify-content:space-between}
.brand{font-size:23px;line-height:1.4;letter-spacing:-.03em}
.nav{gap:28px;font-size:14px}
.footer{padding-block:32px}
.footer-links{display:flex;flex-wrap:wrap;gap:12px 26px;font-size:13px}
.copyright{margin:20px 0 0;font-size:12px;color:#c9c9c3}

.home-stories{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:64px;padding-block:48px 56px}
.home-lead{border:0;padding:0;gap:18px}
.home-story-meta{display:block;font:12px/1.7 var(--mono);color:var(--muted)}
.home-lead h1{font-size:clamp(30px,3.1vw,40px);line-height:1.48;letter-spacing:-.025em}
.home-lead-description{max-width:38em;font-size:16px;line-height:1.9}
.reference-home .article-card:hover{text-decoration:underline;text-underline-offset:5px}
.home-latest>article{padding:18px 0;gap:8px}
.home-latest>article:first-child{padding-top:0}
.home-latest article h2{margin:0;font-size:20px;line-height:1.65;color:var(--ink);font-weight:700}
.home-all{margin-top:4px;padding-top:16px}
.home-topics{background:none;border-color:var(--line)}
.home-topics>.wrap{padding-block:32px 40px}
.home-topics h2,.home-official-news h2,.reference-tools h2{font-size:22px;font-weight:700;margin:0 0 18px;color:var(--ink)}
.home-topic-list{grid-template-columns:repeat(4,minmax(0,1fr));gap:0 30px}
.home-topic-list>li{border:0;border-top:1px solid var(--line);padding:0}
.home-topic-list a{display:flex;justify-content:space-between;gap:10px;align-items:baseline;min-height:64px;padding:18px 0;font-size:16px;font-weight:500}
.home-topic-list a>span{font-size:14px;font-weight:400;color:var(--muted)}
.reference-bottom{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:64px;padding-block:44px 56px}
.home-official-news>header,.reference-tools h2{border:0;padding:0}
.reference-sidebar.reference-tools{display:block}
.reference-tools>a{font-size:16px;min-height:58px;align-items:center}
.news-status:empty{display:none}

.archive-intro{max-width:none;padding:44px 0 24px;margin:0;align-items:baseline}
.archive-intro h1{font-size:38px;margin:0}
.archive-intro .search-status{font-size:13px;margin:0;white-space:nowrap}
.archive-page .archive-controls{padding:0 0 18px;border-top:0;border-bottom:1px solid var(--line);background:none}
.archive-filter-top{justify-content:space-between;gap:20px}
.archive-search{flex:0 1 460px;min-width:240px}
.archive-search input{font-size:16px;border-color:#a7acb5;background:transparent;border-radius:0;width:100%;min-height:44px}
.theme-filters{gap:4px 20px;margin-top:16px}
.theme-filters .filter{border:0;border-bottom:2px solid transparent;padding:8px 0;min-height:44px;border-radius:0;font-size:13px;background:none;color:var(--muted)}
.theme-filters .filter[aria-pressed=true]{background:none;border-color:var(--ink);color:var(--ink)}
.archive-results{padding:16px 0 56px}
.archive-status{border:0;padding:0;min-height:0;justify-content:flex-end}
.archive-status .reset-search{padding:8px 0;margin-bottom:8px;font-size:13px}
.archive-list .article-card{grid-template-columns:100px minmax(0,1fr) 24px;gap:24px;padding:26px 0}
.archive-date{font:12px/1.8 var(--mono);padding-top:6px}
.archive-copy h2{font-size:22px;line-height:1.65}
.archive-copy p{font-size:14px;max-width:58em;margin:8px 0 0;line-height:1.85}
.archive-arrow{padding-top:6px;font-size:17px;color:var(--muted)}
.archive-list .article-card[hidden]{display:none}

.article-hero{max-width:1060px;margin:0;padding:44px 0 32px}
.article-hero h1{font-size:clamp(30px,3.5vw,46px);line-height:1.48;letter-spacing:-.025em;margin:0 0 22px}
.article-hero .lead{max-width:840px;font-size:17px;line-height:1.95;margin:14px 0 0}
.article-meta{display:flex;flex-wrap:wrap;gap:6px 20px;font-size:13px;line-height:1.8;color:var(--muted);margin-top:22px}
.article-meta>a{color:inherit;text-decoration:underline;text-underline-offset:4px}
.article-series{padding-top:32px;font-size:14px}
.article-series+article>.article-hero{padding-top:18px}
.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:56px;align-items:start;padding-top:34px}
.reading-layout>.prose{width:100%;max-width:none;min-width:0}
.reading-layout>.toc{width:auto;position:sticky;top:28px;align-self:start;border-top:0;border-left:1px solid var(--line);padding:0 0 0 20px;margin:6px 0 0;font-size:14px;line-height:1.8}
.toc ul{list-style:none;padding:0;margin:0}
.toc li{margin:0}
.toc li+li{margin-top:12px}
.toc a{display:block;color:var(--muted)}
.toc a:hover{color:var(--green);text-decoration:underline;text-underline-offset:4px}
.article-contents{display:none}
.related h2{font-size:24px}
.related-grid>a{display:flex;align-items:baseline;justify-content:space-between;gap:14px;background:none;border:0;border-top:1px solid var(--line);padding:20px 0;font-size:17px;line-height:1.8}
.related-grid>a>span{flex-shrink:0;color:var(--muted)}
.learning-nav{margin-top:38px;padding-top:26px}
.reading-action{margin-top:28px}

.learning-redesign>.wrap>.learning-intro{display:block;padding:44px 0 28px}
.learning-intro h1{font-size:38px;margin:0;line-height:1.5}
.foundation-section{background:none;color:var(--ink);border:0;padding:0 0 40px}
.foundation-list{display:block;max-width:960px;border-top:1px solid var(--line);margin:0}
.foundation-list li{grid-template-columns:42px minmax(0,1fr);padding:20px 0;gap:16px;border-color:var(--line);align-items:baseline}
.foundation-list a{font-size:20px;font-weight:500;line-height:1.65;color:var(--ink)}
.foundation-list .step-number{font:14px var(--mono);color:var(--muted)}
.learning-experiments{max-width:1200px;background:none;border:0;padding:38px 32px 48px}
.learning-experiments .section-title{margin-bottom:24px}
.learning-experiments .section-title h2,.learning-reading-path .section-title h2{font-size:26px;margin:0}
.learning-demo-layout{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:40px}
.learning-tool-links li{display:block;padding:0;border-color:var(--line)}
.learning-tool-links li:first-child{padding-top:0}
.learning-tool-links a{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:20px 0;min-height:64px;font-size:17px;font-weight:500;line-height:1.7;color:var(--ink)}
.learning-reading-path{padding-top:16px;padding-bottom:52px}
.experiment-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 36px;list-style:none;padding:0;margin:24px 0 0}
.experiment-links li{border-top:1px solid var(--line)}
.experiment-links a{display:flex;justify-content:space-between;align-items:baseline;gap:18px;padding:22px 0;min-height:96px;font-size:18px;line-height:1.8;color:var(--ink)}
.experiment-links a>span{flex-shrink:0;color:var(--muted)}

main>.plain-page{padding-top:40px}
.plain-page h1{margin:0 0 28px;line-height:1.5}
.cost-tool-page{max-width:none}
.cost-tool-page #cost-demo{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,.9fr);gap:42px;align-items:start;padding:0;margin:0;border:0;background:none}
.cost-inputs{min-width:0}
.cost-inputs>.field-grid:not(.currency-fields){grid-template-columns:repeat(2,minmax(0,1fr))}
.cost-inputs>.field-grid:not(.currency-fields)>label:last-child{grid-column:1/-1}
.cost-inputs .field-grid label{font-size:13px}
.cost-inputs input,.cost-inputs select{min-height:44px;font-size:16px}
.cost-estimate{position:sticky;top:24px;padding:24px;border-top:2px solid var(--ink);background:var(--white);min-width:0}
.cost-estimate .demo-output{margin:0;border:0;padding:0}
.cost-estimate .result-label{font-size:15px;font-weight:500}
.cost-estimate strong.result{font-size:clamp(26px,2.4vw,34px);overflow-wrap:anywhere}
.cost-estimate .hint{font-size:13px;line-height:1.9;margin:18px 0 0}
.cost-tool-page>section,.cost-method{max-width:840px}
.cost-method{margin-top:40px;padding:18px 0;border-block:1px solid var(--line)}
.cost-method>summary{font-size:17px;cursor:pointer}
.run-date{font:13px var(--mono);color:var(--muted)}

@media(max-width:1000px){
 .home-stories,.reference-bottom{gap:36px;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}
 .home-lead h1{font-size:34px}
 .home-topic-list{grid-template-columns:repeat(2,minmax(0,1fr))}
 .reading-layout{grid-template-columns:minmax(0,1fr) 190px;gap:32px}
 .archive-list .article-card{grid-template-columns:90px minmax(0,1fr) 20px;gap:18px}
 .archive-copy{grid-column:auto;grid-row:auto}
 .archive-date{grid-column:auto}
}
@media(max-width:900px){
 .reading-layout{display:block}
 .reading-layout>.toc{display:none}
 .article-contents{display:block;margin-top:24px;border-block:1px solid var(--line);padding:12px 0;font-size:14px}
 .article-contents>summary{cursor:pointer;min-height:24px;line-height:24px}
 .article-contents ul{list-style:none;margin:12px 0 0;padding:0}
 .article-contents li+li{margin-top:10px}
 .cost-tool-page #cost-demo{grid-template-columns:1fr;gap:28px}
 .cost-estimate{position:static}
 .learning-demo-layout{grid-template-columns:1fr}
}
@media(max-width:760px){
 .wrap{padding-inline:20px}
 .header .wrap{min-height:70px;padding:12px 20px;gap:8px 20px;flex-wrap:wrap}
 .brand{font-size:22px}
 .header .nav{width:100%;flex-basis:100%;flex-direction:column;gap:0;align-items:stretch;padding:8px 0;font-size:15px}
 .js .header .nav{display:none}
 .js .header .nav.is-open{display:flex}
 .header .menu-toggle:not([hidden]){display:inline-flex;min-height:44px;align-items:center}
 .home-stories{grid-template-columns:1fr;padding-block:32px 40px;gap:30px}
 .home-lead{padding:0;gap:14px}
 .home-lead h1{font-size:29px;line-height:1.55}
 .home-lead-description{font-size:15px}
 .home-latest{margin-top:0}
 .home-latest article h2{font-size:18px}
 .home-topics>.wrap{padding-block:28px 32px}
 .home-topic-list{gap:0 24px}
 .home-topic-list a{font-size:14px;line-height:1.7;min-height:64px;padding:16px 0}
 .reference-bottom{grid-template-columns:1fr;gap:32px;padding-block:32px 40px}
 .reference-sidebar{margin-top:0}
 .archive-intro{padding:30px 0 24px;flex-direction:row;flex-wrap:wrap;gap:8px 20px}
 .archive-intro h1,.learning-intro h1{font-size:32px}
 .archive-filter-top{gap:16px}
 .archive-search{min-width:0;flex-basis:100%;display:block}
 .theme-filters{gap:2px 18px}
 .archive-list .article-card{grid-template-columns:minmax(0,1fr) 18px;gap:6px 14px;padding:22px 0}
 .archive-date{grid-column:1;padding:0;font-size:12px}
 .archive-copy{grid-column:1;grid-row:2}
 .archive-copy h2{font-size:19px;line-height:1.65}
 .archive-copy p{font-size:14px}
 .archive-arrow{grid-column:2;grid-row:2;padding-top:3px}
 .article-hero{padding-top:30px;padding-bottom:26px}
 .article-hero h1{font-size:29px;line-height:1.55;margin-bottom:18px}
 .article-hero .lead{font-size:16px;line-height:1.95}
 .article-meta{font-size:12px;gap:4px 16px;margin-top:18px}
 .reading-layout{padding-top:26px}
 .related-grid{grid-template-columns:1fr}
 .related-grid>a{font-size:16px}
 .learning-redesign>.wrap>.learning-intro{padding:30px 0 24px}
 .foundation-list li{grid-template-columns:28px minmax(0,1fr);gap:12px;padding:18px 0}
 .foundation-list a{font-size:17px}
 .learning-experiments{padding:28px 20px 36px}
 .learning-reading-path{padding-top:12px;padding-bottom:36px}
 .experiment-links{grid-template-columns:1fr}
 .experiment-links a{font-size:17px;min-height:80px}
 main>.plain-page{padding-top:30px}
 .plain-page h1{font-size:30px}
 .cost-inputs>.field-grid:not(.currency-fields){grid-template-columns:1fr}
 .cost-estimate{padding:20px}
 .footer-links{gap:12px 22px;font-size:13px}
}

.article-hero h1,.home-lead h1{text-wrap:balance}

.article-hero .research-cover{height:auto;aspect-ratio:1376/768;border-radius:14px;margin:4px 0 18px}
/* 研究ノートと蛍光ペン（2026-10-27）。紙・墨・薄墨・罫の4色と、記事の肝の一文にだけ引く蛍光ペンの黄。見出しは明朝、本文は BIZ UDPゴシック */
:root{--paper:#fcfcfa;--ink:#161616;--muted:#595959;--line:#d9d9d4;--green:#161616;--lime:#f1f1ec;--surface:#fff;--surface-raised:#f1f1ec;--surface-deep:#161616;--cyan:#161616;--panel:#f1f1ec;--marker:#ffe45c;--head:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;--body:"BIZ UDPGothic","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
body{background:var(--paper);color:var(--ink);font-family:var(--body);line-break:strict;text-autospace:normal}
h1,h2,h3,.brand{font-family:var(--head);font-feature-settings:"palt";font-weight:800;letter-spacing:.02em}
::selection{background:var(--marker)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--ink)}
.marker{background:linear-gradient(transparent 56%,var(--marker) 56%);padding:0 .1em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
/* 頭と足 */
body .header{background:var(--paper);border-bottom:2px solid var(--ink)}
body .header .wrap{height:auto;min-height:84px;padding-block:14px;align-items:flex-end}
body .brand{font-size:30px;font-weight:800;letter-spacing:.06em;line-height:1}
body .nav{gap:26px;font-size:14px}
body .nav a{padding-bottom:2px;border-bottom:1px solid transparent}
body .nav a:hover,body .nav a.is-active{color:var(--ink);border-bottom-color:var(--ink)}
body .menu-toggle{border:0;border-bottom:1px solid var(--ink);border-radius:0;background:none;padding:4px 0}
body .footer{background:var(--paper);color:var(--muted);border-top:2px solid var(--ink);padding:36px 0 48px;margin-top:72px}
body .footer-links{color:var(--ink)}
body .footer-links a,body .footer .brand{color:var(--ink)}
body .footer .copyright{color:var(--muted);font-size:13px}
/* 矢印は飾りなので出さない（意味は文字と下線で伝える） */
.news-arrow,.archive-arrow,.home-topic-list a>span,.related-grid>a>span,.learning-tool-links a>span[aria-hidden],.experiment-links a>span[aria-hidden],.reference-tools>a>span,.card-meta>span[aria-hidden]{display:none}
/* 日付は等幅にしない */
.home-story-meta,.home-updated,.news-source,.reference-home .news-source,.archive-date,.eyebrow,.hero-note,.article-meta,.card-dates{font-family:var(--body)!important;letter-spacing:0}
/* トップ */
.reference-home{color:var(--ink)}
.reference-home .home-stories{gap:56px;padding-block:44px 56px}
.reference-home .home-lead{border-top:0;padding-top:0;gap:16px}
.home-kicker{margin:0;font-size:13px;color:var(--muted);letter-spacing:.04em}
.home-kicker span+span:before{content:"・"}
.reference-home .home-lead h1{font-size:clamp(28px,4.2vw,44px);line-height:1.38;font-weight:800;letter-spacing:.01em}
.reference-home .home-lead h1 a:hover{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.18em}
.home-key{margin:0;font-family:var(--head);font-weight:600;font-size:clamp(18px,2vw,21px);line-height:1.75;max-width:30em}
.reference-home .home-lead-description{font-size:16px;line-height:1.85;color:#3a3a38;max-width:36em}
.home-lead-cover{margin:8px 0 0;max-width:640px}
.home-lead-cover img{display:block;width:100%;height:auto;aspect-ratio:1376/768;object-fit:cover;border-radius:0}
.reference-home .home-latest>h2{font-family:var(--body);font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.04em;border-bottom:1px solid var(--ink)}
.reference-home .home-latest>article{padding:18px 0;gap:4px}
.reference-home .home-latest h3,.reference-home .home-latest article h2{font-size:18px;line-height:1.6;font-weight:600;margin:0}
.reference-home .home-latest a:hover{text-decoration:underline;text-underline-offset:.18em}
.reference-home .home-all{font-size:14px;text-decoration:underline;text-underline-offset:4px}
.reference-home .home-topics{background:none;border-block:1px solid var(--line)}
.reference-home .home-topics>.wrap{padding-block:40px 44px}
.reference-home .home-topics h2{font-family:var(--body);font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.04em;margin:0 0 14px}
.reference-home .home-topic-list{display:flex;flex-wrap:wrap;gap:6px 30px}
.reference-home .home-topic-list>li{border:0;padding:0}
.reference-home .home-topic-list a{font-family:var(--head);font-weight:600;font-size:clamp(20px,2.4vw,26px);line-height:1.6}
.reference-home .home-topic-list a:hover{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em}
.reference-home .reference-bottom{padding-block:48px 24px;gap:56px}
.reference-home .home-official-news>header{border-bottom:1px solid var(--ink)}
.reference-home .home-official-news h2,.reference-home .reference-tools h2{font-family:var(--body);font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.04em}
.home-news-lang{font-size:12px;color:var(--muted)}
.reference-home .news-row{display:flex;gap:4px 24px;flex-wrap:wrap;align-items:baseline}
.reference-home .news-source{flex:0 0 200px;flex-wrap:nowrap;white-space:nowrap;font-size:13px}
@media (max-width:640px){.reference-home .news-source{flex-basis:100%}}
.reference-home .news-row h3{flex:1 1 300px;font-family:var(--body);font-weight:400;font-size:16px;letter-spacing:0}
.reference-home .news-row:hover h3{text-decoration:underline;text-underline-offset:.18em}
.reference-home .reference-tools>a{display:block;padding:14px 0}
.reference-home .reference-tools>a strong{display:block;font-size:15px}
.reference-home .reference-tools>a small{display:block;font-size:13px;color:var(--muted);line-height:1.7;margin-top:2px}
.reference-home .reference-tools>a:hover strong{text-decoration:underline;text-underline-offset:.18em}
/* 記事 */
.article-hero{max-width:44em;padding-top:36px}
.article-kicker{margin:0 0 14px;font-size:13px;color:var(--muted);letter-spacing:.04em}
.article-kicker>*+*:before{content:"｜";margin:0 .5em;color:var(--line)}
.article-hero h1{font-size:clamp(28px,4.4vw,42px);line-height:1.42;font-weight:800;letter-spacing:.01em;margin:0 0 20px}
.article-key{margin:0 0 18px;font-family:var(--head);font-weight:600;font-size:clamp(18px,2.2vw,22px);line-height:1.75}
.article-hero .lead{font-size:17px;line-height:1.85;color:#3a3a38;max-width:40em}
.article-hero .research-cover{border-radius:0;margin:10px 0 20px}
.prose{font-size:17px;line-height:1.85;max-width:40em}
.prose h2{font-size:clamp(22px,2.6vw,27px);line-height:1.5;font-weight:800;margin:56px 0 18px;padding:0;border:0}
.prose h3{font-size:19px;line-height:1.6;font-weight:600;margin:36px 0 12px}
.prose p,.prose li{line-height:1.85}
.prose a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.18em}
.prose strong{font-weight:700}
.prose blockquote{margin:24px 0;padding:0 0 0 1.2em;border-left:2px solid var(--ink);color:#3a3a38}
.prose code{background:var(--panel);border-radius:0}
.prose pre{border-radius:0}
.reading-layout{gap:64px}
.toc{font-size:14px}
.toc ul{border-left:1px solid var(--line)}
.toc a:hover{text-decoration:underline;text-underline-offset:.18em}
@media (max-width:1000px){.article-contents{display:block;margin:20px 0 0;border-block:1px solid var(--line);padding:10px 0}.article-contents>summary{cursor:pointer;font-size:14px;font-weight:700}.article-contents ul{margin:10px 0 4px;padding-left:1.2em;font-size:15px;line-height:1.9}}
.sources ul,.sources ol{font-size:15px}
.related h2{font-size:22px}
.related-grid>a{font-family:var(--head);font-weight:600}
.related-grid>a:hover{text-decoration:underline;text-underline-offset:.18em}
/* 図（研究ノートの SVG）。青と橙の角丸を、罫の四角と蛍光ペンの黄に描き替える */
.research-figure{color:var(--ink);margin:32px 0 6px}
.research-figure svg text{font-family:var(--body)}
.research-figure rect[rx="12"]{rx:0;fill:#fff;fill-opacity:1;stroke:var(--ink);stroke-opacity:.55;stroke-width:1.5}
.research-figure rect[rx="12"][fill="#f59e0b"]{fill:var(--panel);stroke:var(--ink);stroke-opacity:1}
.research-figure rect[rx="12"][fill="#f59e0b"][fill-opacity="0.12"]{fill:var(--marker)}
.research-figure svg{display:block;max-width:560px}
.research-figure rect[rx="6"]{rx:0;fill:#8a8a84;fill-opacity:1}
.research-figure rect[rx="6"][fill="#f59e0b"]{fill:var(--ink)}
.research-figure-caption{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 32px}
.figure-box,figure{border-radius:0}
/* カード（記事一覧の外で使う所）を罫で区切る形に */
.article-card{border-radius:0}
.btn{border-radius:0}
.reference-home .news-original-title{flex:1 1 100%;padding-left:224px;font-size:12px;line-height:1.6;color:var(--muted)}
@media (max-width:640px){.reference-home .news-original-title{padding-left:0}}