*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{margin:0;color:var(--ink,#17202b);background:var(--paper,#fff);font:16px/1.65 var(--font,Arial,sans-serif)}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.13;letter-spacing:-.025em}h1{font-size:clamp(36px,4.6vw,62px);font-weight:600}h2{font-size:29px}h3{font-size:24px}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button,summary{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}input{max-width:100%;min-width:0}[hidden]{display:none!important}.skip{position:absolute;top:-90px;left:10px;padding:12px;background:white;color:black;z-index:30}.skip:focus{top:8px}.wrap{width:min(1180px,calc(100% - 64px));margin:auto}.preview-bar{background:#171d28;color:#fff;display:flex;align-items:center;gap:20px;padding:11px 24px;font:12px/1.4 Arial,sans-serif;position:relative;z-index:20;border-bottom:1px solid #455063}.preview-bar span{color:#bec7d4}.preview-bar nav{display:flex;gap:20px;margin-left:auto}.preview-bar a{color:white;text-decoration:none}.preview-bar a:hover{text-decoration:underline}.mast{max-width:1244px;margin:auto;padding:30px 32px;display:flex;align-items:center;justify-content:space-between;gap:35px;border-bottom:1px solid var(--line,#dfe4eb)}.brand{text-decoration:none;font-size:27px;font-weight:750;line-height:1.1}.brand small{display:block;font:12px/1.5 Arial,sans-serif;font-weight:400;letter-spacing:.02em;margin-top:8px;color:var(--muted,#647080)}.mast nav{display:flex;gap:26px;font-size:14px;flex-wrap:wrap}.mast nav a{text-decoration:none}.mast nav a:hover{text-decoration:underline}.site-footer{display:flex;align-items:center;justify-content:space-between;gap:25px;max-width:1244px;margin:65px auto 0;padding:30px 32px;border-top:1px solid var(--line,#dfe4eb);font-size:13px;color:var(--muted,#647080)}.site-footer a:first-child{font-weight:700}.kicker{display:block;font-size:12px;font-weight:700;letter-spacing:.13em;line-height:1.5;margin-bottom:14px;text-transform:uppercase;color:var(--muted,#647080)}.lead{font-size:20px;line-height:1.65;margin-top:24px;max-width:740px;color:var(--muted,#647080)}.button{display:inline-block;background:var(--accent);color:var(--on-accent);padding:13px 22px;border:0;border-radius:4px;text-decoration:none;font-size:15px;font-weight:700}.section-title{margin:48px 0 25px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px;margin:28px 0}.card{display:flex;flex-direction:column;text-decoration:none;border:1px solid var(--line,#dfe4eb);padding:24px;min-width:0}.card h3{margin-bottom:15px}.card p{font-size:15px;color:var(--muted,#647080);margin-bottom:24px}.card small{font-size:12px;margin-top:auto;color:var(--muted,#647080)}.card:hover h3{text-decoration:underline;text-underline-offset:5px}.search-label{display:block;font-size:14px;font-weight:700;margin:28px 0 20px;max-width:760px}.search-label input{display:block;width:100%;border:1px solid var(--line,#c5cfdf);background:var(--input,#fff);color:var(--ink,#17202b);border-radius:5px;padding:15px 18px;margin-top:10px;font-size:16px}.article-head{padding:44px 0 35px;max-width:920px}.article-head .back{display:block;font-size:13px;margin-bottom:28px}.article-layout{display:grid;grid-template-columns:minmax(0,740px) minmax(180px,1fr);gap:65px;align-items:start}.article-layout>aside{position:sticky;top:25px}.toc{border-top:2px solid var(--accent);padding:20px 0;font-size:14px}.toc strong{display:block;margin-bottom:22px}.toc a{display:block;margin-bottom:16px;text-decoration:none;line-height:1.5}.toc a:hover{text-decoration:underline}.prose{min-width:0;font-size:18px;line-height:1.8}.prose section{margin-bottom:38px;scroll-margin-top:30px}.prose h2{font-size:29px;margin-bottom:18px;line-height:1.3}.prose p{margin:0 0 18px;max-width:70ch}.prose ul{padding-left:24px;margin:18px 0}.prose li{margin:10px 0;padding-left:4px}.checklist{padding:26px;background:var(--soft,#f1f4f8);border-left:3px solid var(--accent)}.faq details{border-top:1px solid var(--line,#dfe4eb);padding:17px 0}.faq summary{font-size:17px;font-weight:700}.faq p{font-size:16px;margin:18px 0 0}.sources{font-size:14px}.hint{font-size:13px;color:var(--muted,#647080)}.cover{position:relative;min-height:210px;overflow:hidden;background:#b9d5cc}.cover span{position:absolute;bottom:5%;left:8%;font:700 110px/1 Arial,sans-serif;color:#ffffff80}.cover:after{content:'';position:absolute;width:50%;aspect-ratio:1;right:-10%;top:-10%;border:25px solid #ffffff55;border-radius:50%}.cover-1{background:linear-gradient(135deg,#6f45bb,#c79dea)}.cover-2{background:linear-gradient(40deg,#9e380c,#ed9140)}.cover-3{background:linear-gradient(150deg,#125746,#51bca0)}.cover-4{background:linear-gradient(120deg,#353e96,#969bea)}.cover-5{background:linear-gradient(70deg,#61482e,#d5b880)}.cover-6{background:linear-gradient(150deg,#8b285c,#e58faf)}.cover-7{background:#366f86}.cover-8{background:#697b37}.tool{padding:30px;border:1px solid var(--line,#526378);background:var(--soft,#edf2f7)}.tool p{margin:20px 0;font-size:15px}.tool-inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0}.tool-inputs label{font-size:14px}.tool input{display:block;width:100%;padding:12px;margin-top:7px;border:1px solid var(--line,#66758d);border-radius:3px;background:var(--input,#fff);color:var(--ink,#17202b)}.tool output{display:block;font-size:52px;font-weight:700;margin-top:28px}.tool output small{display:block;font-size:12px;font-weight:400;color:var(--muted,#647080)}.prose .answer{border-bottom:1px solid var(--line,#dfe4eb);padding:20px 0}.answer summary{font-size:23px;font-weight:700}.answer section{padding-top:22px;margin-bottom:5px}.step-check{display:flex;gap:12px;align-items:center;font-size:15px;cursor:pointer}.step-check input{width:20px;height:20px;accent-color:var(--accent)}.progress-line{font-size:13px;margin:0 0 30px}.progress-line progress{display:block;width:100%;height:8px;margin-top:10px;accent-color:var(--accent)}
@media(max-width:850px){.mast{align-items:start;gap:20px}.mast nav{gap:14px}.article-layout{gap:30px;grid-template-columns:minmax(0,1fr) 180px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.preview-bar{flex-wrap:wrap;gap:8px 15px}.preview-bar nav{gap:16px;margin-left:0}.preview-bar>span{margin-left:auto}}
@media(max-width:600px){.wrap{width:calc(100% - 36px)}.mast{padding:24px 18px;display:block}.mast nav{margin-top:22px;font-size:13px}.brand{font-size:25px}.lead{font-size:18px}.preview-bar{padding:10px 15px;font-size:11px}.preview-bar nav{width:100%;gap:20px}.cards{grid-template-columns:1fr;gap:18px}.card{padding:22px}.article-head{padding:30px 0}.article-head h1{font-size:36px}.article-layout{display:flex;flex-direction:column;gap:25px}.article-layout>aside{position:static;order:-1;width:100%}.toc{padding:18px 0 0}.toc strong{margin-bottom:14px}.toc a{display:inline-block;margin:0 15px 10px 0;font-size:13px}.prose{font-size:17px;line-height:1.8}.prose h2{font-size:26px}.checklist{padding:20px}.tool{padding:22px}.tool-inputs{gap:10px}.tool-inputs label{font-size:12px}.site-footer{display:block;padding:25px 18px;margin-top:40px}.site-footer span{display:block;margin:12px 0}.cover{min-height:230px}.search-label{margin-top:24px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* 01: first-page newspaper, compact columns and typographic hierarchy. */
.design-newspaper{--paper:#fbfaf5;--ink:#262522;--muted:#66645d;--line:#cbc8be;--soft:#efede5;--font:Georgia,serif}.design-newspaper .mast{display:block;text-align:center;border-bottom:4px double #262522;padding-bottom:16px}.design-newspaper .brand{font-size:57px;letter-spacing:-.04em}.design-newspaper .brand small{font-size:12px;letter-spacing:.14em}.design-newspaper .mast nav{justify-content:center;margin-top:22px;text-transform:uppercase;font:12px Arial,sans-serif;letter-spacing:.09em}.newspaper-page{padding-top:14px}.edition{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line);font:11px Arial,sans-serif;letter-spacing:.1em}.newspaper-title{text-align:center;font-size:68px;padding:35px 0;border-bottom:1px solid var(--ink);line-height:1.04;letter-spacing:-.045em}.news-front{display:grid;grid-template-columns:1fr 2.1fr 1fr;gap:26px;margin-top:30px}.news-front>article{padding:0 26px;border-inline:1px solid var(--line)}.news-front>article h2{font-size:43px;line-height:1.1}.news-front .lead{font-size:19px}.news-front .button{margin-top:24px;font:13px Arial,sans-serif;border-radius:0}.news-front aside h2{font-size:23px}.news-brief{display:block;text-decoration:none;padding:18px 0;border-bottom:1px solid var(--line)}.news-brief:first-of-type{padding-top:0}.news-brief p{font-size:14px;line-height:1.55;margin-top:12px}.editorial-rule{margin-top:28px;border-top:3px solid var(--ink);padding-top:13px;font-size:13px;font-style:italic}.design-newspaper .section-title{border-block:3px double var(--ink);padding:12px 0;font:700 15px Arial,sans-serif;text-transform:uppercase;letter-spacing:.1em}.design-newspaper .card{border:0;border-right:1px solid var(--line);padding:5px 22px 5px 0}.design-newspaper .card h3{font-size:28px}.design-newspaper .article-head{margin:auto;text-align:center;max-width:1000px}.design-newspaper .article-head h1{font-size:62px}.design-newspaper .article-head .lead{margin-inline:auto}.newspaper-article{margin-top:35px;padding-top:35px;border-top:4px double var(--ink)}
/* 02: navigation remains visible; content behaves like a help centre. */
.design-knowledge{--paper:#fff;--ink:#17233c;--muted:#61708a;--line:#dbe4f1;--soft:#f0f5ff;--font:'Segoe UI',Arial,sans-serif}.knowledge-shell{display:grid;grid-template-columns:255px minmax(0,1fr);max-width:1440px;margin:auto}.knowledge-sidebar{padding:36px 26px;background:#f3f6fc;border-right:1px solid var(--line);min-height:calc(100vh - 40px)}.knowledge-sidebar .brand{display:block;margin-bottom:55px}.knowledge-sidebar>a:not(.brand){display:flex;gap:16px;padding:14px 12px;text-decoration:none;font-size:15px;border-radius:6px}.knowledge-sidebar>a:not(.brand):hover{background:#e1eaff;color:#164fb3}.knowledge-sidebar a span{font-size:12px;color:#8390a7}.knowledge-sidebar .sidebar-help{margin-top:60px;font-size:13px!important;border-top:1px solid var(--line);border-radius:0!important}.knowledge-main{padding:0 45px 30px}.utility{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:20px 0;margin-bottom:48px;color:var(--muted);font-size:12px}.knowledge-main h1{font-size:45px;letter-spacing:-.03em}.knowledge-main .search-label{max-width:none}.knowledge-main .search-label input{box-shadow:0 6px 22px #1533640a;padding:18px}.knowledge-categories{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:32px 0}.knowledge-categories a{position:relative;padding:25px 25px 25px 72px;border:1px solid var(--line);border-radius:10px;text-decoration:none}.knowledge-categories b{position:absolute;left:20px;top:23px;padding:4px 8px;background:#e8efff;color:#2455bc;border-radius:4px;font-size:13px}.knowledge-categories h2{font-size:21px}.knowledge-categories p{font-size:14px;color:var(--muted);margin:10px 0}.knowledge-categories span{font-size:12px}.design-knowledge .cards{display:block}.design-knowledge .card{padding:18px 0;border:0;border-top:1px solid var(--line)}.design-knowledge .card h3{font-size:19px;margin-bottom:8px}.design-knowledge .card .kicker,.design-knowledge .card small{display:none}.design-knowledge .card p{margin:0;font-size:14px}.design-knowledge .article-head{padding-top:0}.design-knowledge .prose h2{font-size:25px}.design-knowledge .article-layout{gap:35px;grid-template-columns:minmax(0,1fr) 190px}
/* 03: a functional instrument, dark UI and a result display. */
.design-laboratory{--paper:#101820;--ink:#e8f4ee;--muted:#9bacb6;--line:#314450;--soft:#182831;--input:#111f27;--font:'Cascadia Code',Consolas,monospace}.design-laboratory .mast{max-width:1244px}.design-laboratory .brand{font-size:24px;font-weight:500}.lab-page{padding-top:24px}.lab-status{display:flex;justify-content:space-between;font-size:11px;letter-spacing:.1em;color:var(--accent);margin-bottom:32px}.lab-page>h1{font:500 49px/1.2 Arial,sans-serif;margin-bottom:35px}.lab-page h1 em{font-style:normal;color:var(--accent)}.lab-page>.tool{display:grid;grid-template-columns:1fr 1fr;gap:20px 55px;padding:36px;border-top:2px solid var(--accent)}.lab-page>.tool>div:first-child{grid-row:span 2}.lab-page>.tool h2{font-size:34px;font-weight:500}.lab-page>.tool .tool-inputs{margin:0}.lab-page>.tool .button{justify-self:start}.lab-page>.tool output{grid-column:2;margin-top:0;font-size:64px;color:var(--accent)}.lab-heading{display:flex;justify-content:space-between;align-items:center;margin-top:48px;border-top:1px solid var(--line);padding-top:28px}.lab-heading h2{font-size:25px;font-weight:400}.lab-heading span{font-size:12px;color:var(--muted)}.design-laboratory .cards{grid-template-columns:repeat(4,1fr)}.design-laboratory .card{border:0;border-left:1px solid var(--line);padding:0 18px}.design-laboratory .card h3{font:500 23px Arial,sans-serif}.design-laboratory .card p{font:14px/1.7 Arial,sans-serif}.design-laboratory .article-head h1{font:500 49px/1.16 Arial,sans-serif}.design-laboratory .prose{font-family:Arial,sans-serif}.lab-article{grid-template-columns:minmax(0,1.7fr) minmax(280px,1fr);gap:35px}.lab-article .tool h2{font-size:25px}.lab-article .tool-inputs{grid-template-columns:1fr}.lab-article .tool output{font-size:40px}.cursor{color:var(--accent)}
/* 04: oversized typographic poster with flat contrasting planes. */
.design-poster{--paper:#f0f0ea;--ink:#151515;--muted:#4c4c43;--line:#151515;--soft:#e5e5dc;--font:Arial,sans-serif}.design-poster .mast{max-width:none;background:#151515;color:white;border:0;padding-block:22px}.design-poster .brand{text-transform:uppercase;font-size:22px}.design-poster .brand small{display:none}.design-poster .mast nav{font-size:12px;text-transform:uppercase}.poster-hero{position:relative;background:var(--accent);color:var(--on-accent);padding:45px max(32px,calc((100vw - 1180px)/2)) 40px;overflow:hidden}.poster-hero .kicker{color:inherit}.poster-hero h1{font-family:'Arial Black',Arial,sans-serif;font-size:clamp(60px,7.5vw,110px);font-weight:950;letter-spacing:-.065em;line-height:.95;max-width:950px}.poster-hero h1 span{color:transparent;-webkit-text-stroke:2px currentColor;color:var(--on-accent);font-style:italic}.poster-hero p{margin-top:30px;max-width:360px;font-size:15px}.poster-arrow{position:absolute;right:7%;bottom:8%;font:120px/.7 Arial;text-decoration:none}.poster-list>a{display:grid;grid-template-columns:70px 1.2fr 1fr 60px;align-items:center;gap:25px;text-decoration:none;border-bottom:2px solid #151515;padding:32px max(32px,calc((100vw - 1180px)/2))}.poster-list>a:nth-child(even){background:#dedfd5}.poster-list>a>span{font:700 24px Arial;writing-mode:vertical-rl}.poster-list h2{font-size:36px;font-weight:850;text-transform:uppercase}.poster-list p{font-size:15px}.poster-list b{font-size:40px}.poster-article-head{background:var(--accent);color:var(--on-accent);padding:0 32px}.poster-article-head>.article-head{max-width:1180px;margin:auto;padding:45px 0}.poster-article-head .lead,.poster-article-head .kicker{color:inherit}.poster-article-head h1{font-size:65px;text-transform:uppercase;font-weight:900}.poster-article{max-width:1100px;padding-top:50px}.poster-article .prose>section{padding:24px 0 30px 110px;position:relative;border-bottom:2px solid var(--ink)}.poster-article section[data-step]:before{content:'0' attr(data-step);position:absolute;left:0;top:25px;font-size:46px;font-weight:900}.poster-article .prose h2{text-transform:uppercase}.poster-article .prose .checklist{padding:28px 35px}
/* 05: a two-dimensional index; coordinates replace a sequential path. */
.design-atlas{--paper:#eef1e8;--ink:#253c33;--muted:#596f61;--line:#bbc9bd;--soft:#e3eadf;--font:Arial,sans-serif}.design-atlas .mast{max-width:none;padding-block:24px;border-bottom:1px solid #748d79}.design-atlas .brand{font:700 29px Georgia,serif}.design-atlas .brand small{display:none}.atlas-layout{display:grid;grid-template-columns:250px minmax(0,1fr);max-width:1440px;margin:auto}.atlas-key{border-right:1px solid var(--line);padding:40px 28px}.atlas-key h2{font:32px/1.15 Georgia,serif}.atlas-key p{font-size:14px;margin:22px 0}.atlas-key ol{padding-left:20px;font-size:14px}.atlas-key li{padding:8px 0}.compass{font:16px/1.5 Georgia,serif;text-align:center;margin:50px auto 0;width:100px;border:1px solid var(--line);border-radius:50%;padding:15px 0}.atlas-main{padding:38px 38px 0;min-width:0}.atlas-top{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:30px}.atlas-top h1{font:52px/1.02 Georgia,serif}.atlas-top>span{font:11px/1.8 monospace;text-align:right;letter-spacing:.1em}.topic-map{display:grid;grid-template-columns:1.2fr 1fr;gap:0;padding:22px;border:1px solid #6e8d78;background-image:linear-gradient(#80978822 1px,transparent 1px),linear-gradient(90deg,#80978822 1px,transparent 1px);background-size:24px 24px}.map-cell{min-height:175px;margin:12px;padding:22px;border:1px solid #6e8d78;text-decoration:none;position:relative;background:#f8f9f1}.map-cell>span{font:12px monospace;letter-spacing:.12em}.map-cell h2{font:29px Georgia,serif;margin:18px 0 12px}.map-cell p{font-size:13px;max-width:210px}.map-cell b{position:absolute;right:18px;top:18px}.map-cell-2{transform:translateY(16px);background:#d9e5d8}.map-cell-3{background:#dce5c7;transform:translateX(12px)}.map-cell-4{border-radius:0 0 55px 0}.design-atlas .card{border:0;border-top:1px solid #6e8d78;padding:20px 0}.design-atlas .card h3{font:27px Georgia,serif}.design-atlas .prose{max-width:780px}.design-atlas .toc{display:flex;flex-wrap:wrap;gap:16px;font:12px monospace;border:1px solid var(--line);padding:16px;margin-bottom:35px}.design-atlas .toc a,.design-atlas .toc strong{margin:0}.design-atlas .article-head h1{font:48px/1.13 Georgia,serif}
/* 06: notebook pages, a real margin and external chapter tabs. */
.design-notebook{--paper:#ded9ce;--ink:#35332e;--muted:#716c60;--line:#d7d0bf;--soft:#f2ecd8;--font:Georgia,serif}.notebook-mast{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1180px;margin:auto;padding:25px 25px 20px}.notebook-mast>span,.notebook-mast>a:last-child{font:12px Arial,sans-serif;letter-spacing:.1em}.notebook-shell{max-width:1100px;margin:5px auto 50px;padding:0 25px}.notebook-tabs{display:flex;justify-content:end;padding-right:30px;gap:7px}.notebook-tabs a{font:13px Arial,sans-serif;background:#c8b98d;color:#35332e;padding:13px 20px 11px;text-decoration:none;border-radius:6px 6px 0 0}.notebook-tabs a:nth-child(2){background:#c9d2bf}.notebook-tabs a:nth-child(3){background:#dac3ae}.notebook-tabs a:nth-child(4){background:#e7dfc6}.paper{display:grid;grid-template-columns:145px minmax(0,1fr);background:#fffdf3;box-shadow:6px 7px 0 #bbb5a54d,0 10px 40px #51432619;border:1px solid #c9c0ae;position:relative;min-height:700px}.paper:before{content:'';position:absolute;left:18px;top:25px;bottom:25px;width:12px;background:radial-gradient(circle,#aaa28d 3px,transparent 4px) 0 0/12px 38px}.paper-margin{border-right:1px solid #d59390;margin:35px 0;padding:4px 18px 20px 40px;font-size:12px;font-style:italic;color:#887d64}.paper-margin>p{margin-top:95px;line-height:2}.pencil-note{display:block;margin-top:70px;transform:rotate(-9deg);color:#9c4445;font-size:14px}.paper-content{padding:45px 50px 50px}.paper-content h1{font-size:64px;font-weight:400;line-height:1.03}.paper-content h1 em{color:var(--accent);font-weight:400}.paper-content>.lead{font-size:19px}.pinned-note{background:#f2e6a9;padding:25px 30px;margin:38px 0 45px;transform:rotate(-1.2deg);box-shadow:3px 5px 0 #b3a25f30;max-width:600px}.pinned-note>span{font:11px Arial;letter-spacing:.1em;color:#746830}.pinned-note h2{font-size:30px;font-weight:400;margin:15px 0}.pinned-note a{font-size:14px}.design-notebook .cards{display:block}.design-notebook .card{display:block;padding:18px 0;border:0;border-bottom:1px solid #d6cfbd;background:repeating-linear-gradient(transparent,transparent 31px,#ded6c64d 32px)}.design-notebook .card .kicker,.design-notebook .card small{display:none}.design-notebook .card h3{font-size:26px;font-weight:400;margin-bottom:10px}.design-notebook .card p{font:15px/1.8 Georgia,serif;margin:0}.design-notebook .section-title{font-size:23px;font-style:italic;font-weight:400}.design-notebook .article-head{padding:0 0 30px}.design-notebook .article-head h1{font-size:45px}.design-notebook .prose h2{font-size:28px;font-weight:400}.design-notebook .prose p{line-height:1.85}
/* 07: image-first masonry with varied proportions rather than uniform cards. */
.design-gallery{--paper:#19151e;--ink:#f7f1fb;--muted:#b7a8c0;--line:#43364e;--soft:#2a2232;--font:Arial,sans-serif}.design-gallery .brand{font-weight:500;letter-spacing:-.06em;font-size:32px}.design-gallery .brand small{display:none}.design-gallery .mast{border:0;padding-top:30px}.gallery-page{padding-top:30px}.gallery-intro{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:50px}.gallery-intro h1{font-size:65px;font-weight:400;line-height:1.05;letter-spacing:-.05em}.gallery-intro h1 em{color:var(--accent);font-style:normal}.gallery-intro>p{font-size:15px;max-width:320px;color:var(--muted);padding-bottom:8px}.gallery-intro>p a{display:block;margin-top:25px;color:var(--ink)}.design-gallery .cards{display:grid;grid-template-columns:1.2fr .85fr 1fr;gap:28px}.design-gallery .card{padding:0;border:0;display:block}.design-gallery .cover{margin-bottom:22px;min-height:285px}.design-gallery .card:nth-child(3n+2){padding-top:65px}.design-gallery .card:nth-child(3n){padding-top:25px}.design-gallery .card:nth-child(3n+2) .cover{min-height:370px;border-radius:130px 130px 0 0}.design-gallery .card:nth-child(4) .cover{min-height:370px}.design-gallery .card h3{font-weight:400;font-size:31px}.design-gallery .card p{display:none}.design-gallery .card .kicker{font-size:11px}.gallery-article-header{display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;margin-bottom:65px}.gallery-article-header>.cover{height:400px;border-radius:50% 50% 0 0}.gallery-article-header h1{font-size:57px;font-weight:400}.design-gallery .article-layout{max-width:1000px;margin:auto}.design-gallery .prose h2{font-weight:400}.design-gallery .toc{border-color:var(--line)}
/* 08: a sequential route, with interaction tied to progress. */
.design-journey{--paper:#fff;--ink:#173932;--muted:#607a73;--line:#d1e3dc;--soft:#eef8f4;--font:'Trebuchet MS',Arial,sans-serif}.design-journey .mast{border:0}.design-journey .brand{font-size:28px}.design-journey .brand small{display:none}.journey-page{max-width:1080px;padding-top:35px}.journey-intro{text-align:center;max-width:780px;margin:0 auto 55px}.journey-intro h1{font-size:59px;font-weight:600;line-height:1.08}.journey-intro .lead{font-size:19px;margin-inline:auto}.journey-intro .button{margin-top:26px;border-radius:30px;padding:14px 27px}.journey-track{max-width:880px;margin:auto}.journey-track>a{display:flex;align-items:center;gap:32px;position:relative;padding:10px 20px 40px 0;text-decoration:none}.journey-track>a:before{content:'';position:absolute;left:29px;top:20px;bottom:0;width:2px;background:var(--line);z-index:-1}.journey-track>a:last-child:before{display:none}.step-number{flex:0 0 60px;height:60px;border:2px solid var(--accent);border-radius:50%;background:var(--paper);color:var(--accent);display:grid;place-items:center;font:700 24px Arial,sans-serif}.journey-track>a>div{flex:1;background:var(--soft);padding:25px 30px;border-radius:14px}.journey-track .kicker{font-size:11px;margin-bottom:9px}.journey-track h2{font-size:28px;font-weight:600}.journey-track p{font-size:15px;color:var(--muted);margin-top:10px}.journey-track b{font-size:27px}.journey-article{display:grid;grid-template-columns:220px minmax(0,1fr);gap:60px}.journey-article>aside{position:sticky;top:30px;align-self:start}.journey-article>aside .hint{margin-top:20px}.journey-article .article-head{padding-top:0}.journey-article .article-head h1{font-size:47px}.journey-article .prose>section[data-step]{border:1px solid var(--line);padding:26px;border-radius:12px}.journey-article .prose>section[data-step]:has(input:checked){background:var(--soft)}
/* 09: question feed, expandable answers and topic labels. */
.design-questions{--paper:#fff;--ink:#2c2d32;--muted:#6a717c;--line:#e0e3e8;--soft:#fff5e9;--font:'Segoe UI',Arial,sans-serif}.design-questions .mast{max-width:1200px;padding-block:24px}.design-questions .brand{font-size:25px}.design-questions .brand small{display:none}.question-page{max-width:1136px;padding-top:45px}.question-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:65px}.question-page h1{font-size:43px;font-weight:700}.question-label{display:inline-block;padding:5px 10px;background:#fff0df;color:#94400f;border-radius:4px;font-size:11px;font-weight:700;margin-bottom:20px;letter-spacing:.06em}.question-page .lead{font-size:17px}.question-tabs{display:flex;gap:22px;border-bottom:1px solid var(--line);margin-top:30px}.question-tabs button{border:0;background:none;color:var(--muted);font-size:14px;padding:10px 0 13px;border-bottom:3px solid transparent}.question-tabs button[aria-pressed=true]{border-color:var(--accent);color:var(--ink);font-weight:700}.question-row{border-bottom:1px solid var(--line)}.question-row summary{list-style:none;display:flex;align-items:center;gap:17px;padding:23px 0}.question-row summary::-webkit-details-marker{display:none}.q-mark{display:grid;place-items:center;width:35px;height:35px;flex:0 0 35px;border:1px solid #edc5a8;border-radius:50%;color:#a34c13;font:22px Georgia,serif}.question-row small{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-bottom:7px}.question-row strong{font-size:20px}.question-row b{margin-left:auto;font-size:22px;font-weight:400}.question-row>div{padding:0 0 24px 52px;font-size:15px}.question-row>div>a{display:block;margin-top:14px;color:var(--accent)}.question-aside{padding-top:5px}.question-aside>h2{font-size:17px;margin-bottom:18px}.question-aside>a{display:block;font-size:14px;color:var(--muted);padding:10px 0;text-decoration:none}.question-tip{margin-top:38px;padding:25px;background:#fff3df;border-radius:8px}.question-tip>span{font-size:40px;color:#ad6222}.question-tip h3{font-size:23px;margin:12px 0}.question-tip p{font-size:14px;line-height:1.6;color:#866a45}.accepted-answer{padding:25px;background:#f0f8ed;border-left:4px solid #568949;margin-bottom:26px}.accepted-answer strong{font-size:13px;color:#4c7243}.accepted-answer p{font-size:17px;margin-top:12px}.question-page .article-head{padding-top:0}.question-page .article-head>.lead{display:none}.question-page .prose{font-size:17px}
/* 10: reference table, alphabet filtering and definition metadata. */
.design-directory{--paper:#fff;--ink:#282238;--muted:#756c83;--line:#ddd7e9;--soft:#f4f0fa;--font:Arial,sans-serif}.design-directory .mast{max-width:none;background:#eee9f6;border-bottom:1px solid #d4cbe1;padding-block:22px}.design-directory .brand{font-size:25px;letter-spacing:-.04em}.design-directory .brand small{display:none}.directory-page{padding-top:43px;max-width:1180px}.directory-head{display:flex;justify-content:space-between;align-items:end;gap:50px;margin-bottom:30px}.directory-head h1{font-size:41px;max-width:600px;letter-spacing:-.03em}.directory-head>p{font-size:14px;color:var(--muted);max-width:230px}.directory-page .search-label{max-width:none}.alphabet{display:flex;gap:6px;border-bottom:2px solid var(--accent);padding:7px 0 17px;margin-top:28px}.alphabet button{border:1px solid var(--line);border-radius:3px;background:var(--paper);color:var(--ink);padding:7px 14px;font:14px Consolas,monospace}.alphabet button[aria-pressed=true]{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.directory-table{overflow:auto}.directory-table table{width:100%;border-collapse:collapse;text-align:left}.directory-table th{padding:17px 18px;font-size:12px;color:var(--muted);font-weight:400;border-bottom:1px solid var(--line);background:#faf8fd}.directory-table td{padding:18px;border-bottom:1px solid var(--line);font-size:13px;vertical-align:top;white-space:nowrap}.directory-table td:first-child{white-space:normal;width:65%}.directory-table td:first-child>a{font-size:18px;font-weight:700;text-decoration:none}.directory-table td p{font-size:13px;line-height:1.6;color:var(--muted);margin-top:7px;max-width:650px}.directory-table td:last-child>a{font-size:20px;text-decoration:none}.directory-table tr:hover{background:#faf8fd}.dictionary-head{display:flex;align-items:start;gap:35px;padding:20px 0 40px;border-bottom:1px solid var(--line);margin-bottom:35px}.dictionary-letter{font:70px/1 Consolas,monospace;color:#8c7db0;background:#f0ecf7;min-width:110px;padding:20px;text-align:center}.dictionary-head h1{font-size:45px}.dictionary-head .lead{font-size:19px}.definition{padding:25px;background:var(--soft);font-size:14px}.definition strong{display:block;font-size:11px;text-transform:uppercase;color:var(--muted)}.definition p{margin:8px 0 22px}.definition p:last-child{margin-bottom:0}.design-directory .prose h2{font-size:27px}
@media(max-width:1000px){.news-front{grid-template-columns:1fr 2fr}.news-front>aside:last-child{display:none}.design-laboratory .cards{grid-template-columns:repeat(2,1fr)}.knowledge-shell{grid-template-columns:210px minmax(0,1fr)}.knowledge-main{padding-inline:28px}.knowledge-sidebar{padding-inline:18px}.design-knowledge .article-layout{display:block}.design-knowledge .article-layout>aside{position:static}.atlas-layout{grid-template-columns:200px minmax(0,1fr)}.atlas-key{padding-inline:20px}.atlas-main{padding-inline:25px}.atlas-top h1{font-size:42px}.map-cell{padding:18px;margin:8px}.topic-map{padding:12px}.paper-content{padding-inline:32px}.question-layout{gap:35px;grid-template-columns:minmax(0,1fr) 210px}.journey-article{gap:30px;grid-template-columns:190px minmax(0,1fr)}.poster-list>a{padding-inline:32px;grid-template-columns:45px 1.2fr 1fr 35px;gap:20px}.poster-list h2{font-size:29px}.lab-article{grid-template-columns:1fr}.lab-article>aside{position:static}.lab-article .tool-inputs{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.knowledge-shell{display:block}.knowledge-sidebar{min-height:0;border-right:0;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:6px 15px;padding:23px 20px}.knowledge-sidebar .brand{width:100%;margin-bottom:16px}.knowledge-sidebar>.kicker,.knowledge-sidebar .sidebar-help,.knowledge-sidebar a span{display:none!important}.knowledge-sidebar>a:not(.brand){padding:5px 0;font-size:13px}.knowledge-main{padding:0 20px 20px}.utility{margin-bottom:30px;font-size:11px}.utility span{display:none}.knowledge-main h1{font-size:38px}.knowledge-categories{gap:12px}.knowledge-categories a{padding:20px}.knowledge-categories b{position:static;display:inline-block;margin-bottom:14px}.knowledge-categories h2{font-size:20px}.atlas-layout{display:block}.atlas-key{border-right:0;border-bottom:1px solid var(--line);padding:20px;display:flex;align-items:center;gap:20px}.atlas-key>h2,.atlas-key>p,.atlas-key>.compass,.atlas-key>.kicker{display:none}.atlas-key ol{display:flex;flex-wrap:wrap;gap:8px 22px;margin:0;font-size:12px}.atlas-key li{padding:0}.atlas-main{padding:30px 20px 0}.atlas-top h1{font-size:40px}.atlas-top>span{display:none}.map-cell h2{font-size:25px}.map-cell p{font-size:12px}.question-layout{display:block}.question-aside{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:35px;border-top:1px solid var(--line);padding-top:20px}.question-aside h2,.question-tip{display:none}.question-aside>a{font-size:13px}.question-page h1{font-size:37px}.journey-article{display:flex;flex-direction:column;gap:20px}.journey-article>aside{position:static}.journey-article>aside .hint{display:none}.journey-article .article-head h1{font-size:38px}.paper{grid-template-columns:65px minmax(0,1fr)}.paper-margin{padding:5px 8px 10px 28px}.paper-margin p,.pencil-note{display:none}.paper:before{left:9px;width:10px}.paper-content{padding:30px 23px}.paper-content h1{font-size:49px}.notebook-tabs{padding-right:10px;gap:4px}.notebook-tabs a{padding:11px 10px;font-size:11px}.notebook-mast>span{display:none}.notebook-shell{padding:0 12px}.notebook-mast{padding-inline:20px}.pinned-note{padding:23px}.pinned-note h2{font-size:26px}.gallery-intro h1{font-size:54px}.gallery-intro>p{max-width:180px;font-size:13px}.design-gallery .cards{grid-template-columns:repeat(2,1fr);gap:25px 18px}.design-gallery .card:nth-child(n){padding-top:0}.design-gallery .card:nth-child(even){padding-top:40px}.design-gallery .cover,.design-gallery .card:nth-child(n) .cover{min-height:230px}.design-gallery .card h3{font-size:26px}.gallery-article-header{grid-template-columns:1fr;gap:15px;margin-bottom:30px}.gallery-article-header>.cover{height:240px;border-radius:0}.gallery-article-header h1{font-size:42px}.dictionary-head{gap:20px}.dictionary-letter{font-size:45px;min-width:65px;padding:15px}.dictionary-head h1{font-size:37px}.directory-head{display:block}.directory-head>p{margin-top:18px;max-width:none}.directory-head h1{font-size:36px}}
@media(max-width:600px){.design-newspaper .mast .brand{font-size:44px}.newspaper-title{font-size:45px;padding:25px 0}.edition{font-size:9px;letter-spacing:.04em}.news-front{display:flex;flex-direction:column;gap:25px}.news-front>article{order:-1;padding:0 0 25px;border:0;border-bottom:1px solid var(--line)}.news-front>article h2{font-size:36px}.news-front>aside:first-child{display:grid;grid-template-columns:1fr 1fr;gap:15px}.news-front>aside>.kicker{grid-column:span 2;margin:0}.news-front aside h2{font-size:22px}.design-newspaper .card{border:0;border-top:1px solid var(--line);padding-top:20px}.design-newspaper .article-head h1{font-size:39px}.knowledge-categories{grid-template-columns:1fr}.knowledge-categories a{padding:20px 20px 20px 65px}.knowledge-categories b{position:absolute;left:18px;top:19px}.lab-status{font-size:9px;gap:20px}.lab-page>h1{font-size:36px}.lab-page>.tool{display:block;padding:23px}.lab-page>.tool .tool-inputs{margin:25px 0}.lab-page>.tool output{font-size:48px;margin-top:25px}.lab-page>.tool h2{font-size:30px}.design-laboratory .card{padding-left:12px}.design-laboratory .card h3{font-size:20px}.design-laboratory .article-head h1{font-size:36px}.lab-heading h2{font-size:22px}.poster-hero{padding:35px 20px}.poster-hero h1{font-size:53px;line-height:1}.poster-arrow{font-size:70px;right:20px;bottom:30px}.poster-hero p{max-width:240px;font-size:13px}.poster-list>a{grid-template-columns:26px 1fr 25px;gap:15px;padding:25px 20px}.poster-list p{grid-column:2;font-size:14px}.poster-list b{grid-column:3;grid-row:1;font-size:25px}.poster-list h2{font-size:29px}.poster-list>a>span{font-size:18px}.poster-article-head{padding:0 20px}.poster-article-head h1{font-size:39px}.poster-article .prose>section{padding-left:0;padding-top:65px}.poster-article section[data-step]:before{font-size:30px;top:10px}.topic-map{padding:6px}.map-cell{min-height:190px;padding:15px;margin:6px}.map-cell h2{font-size:24px;margin-top:24px}.map-cell-2,.map-cell-3{transform:none}.atlas-top h1{font-size:38px}.design-atlas .article-head h1{font-size:37px}.paper-content{padding-inline:18px}.paper-content h1{font-size:43px}.paper-content>.lead{font-size:17px}.paper-content .article-head h1{font-size:33px}.paper-content .prose{font-size:16px}.paper-content .prose h2{font-size:24px}.design-notebook .card h3{font-size:24px}.pinned-note{padding:18px}.pinned-note h2{font-size:24px}.gallery-intro{display:block;margin-bottom:30px}.gallery-intro>p{max-width:none;margin-top:25px}.gallery-intro h1{font-size:51px}.design-gallery .cards{gap:22px 16px}.design-gallery .cover,.design-gallery .card:nth-child(n) .cover{min-height:190px}.design-gallery .card:nth-child(even) .cover{min-height:235px;border-radius:75px 75px 0 0}.design-gallery .card h3{font-size:23px}.design-gallery .card .kicker{font-size:10px}.design-gallery .cover span{font-size:70px}.journey-intro h1{font-size:42px}.journey-intro .lead{font-size:17px}.journey-track>a{gap:16px;padding-right:0}.step-number{flex-basis:42px;height:42px;font-size:20px}.journey-track>a:before{left:20px}.journey-track>a>div{padding:22px}.journey-track h2{font-size:26px}.journey-track p{font-size:14px}.journey-track>a>b{display:none}.journey-article .prose>section[data-step]{padding:21px}.question-row strong{font-size:18px}.question-row summary{gap:12px}.question-row>div{padding-left:45px}.directory-table th,.directory-table td{padding:14px 10px}.directory-table td:first-child>a{font-size:17px}.directory-table th:nth-child(3),.directory-table td:nth-child(3){display:none}.directory-table td:first-child{min-width:195px}.directory-table td:nth-child(2){white-space:normal;max-width:90px;font-size:12px}.dictionary-head{display:block}.dictionary-letter{display:inline-block;font-size:32px;min-width:50px;margin-bottom:25px}.dictionary-head h1{font-size:36px}.dictionary-head .lead{font-size:18px}}
:root{font-size:16px}body{font-size:1rem}h1{white-space:pre-line;overflow-wrap:break-word}.mast{align-items:flex-start}.mast nav{flex-wrap:wrap;gap:12px 18px}.mast nav a{font-size:.875rem}.brand small{max-width:36ch;line-height:1.5}.site-footer nav{display:flex;gap:18px;flex-wrap:wrap}.prose{max-width:740px}.prose section{margin:0 0 2.5rem}.prose h2{font-size:1.7rem;line-height:1.25;margin:0 0 1rem}.prose p{font-size:1.0625rem;line-height:1.78;margin:0 0 1.1rem}.prose ul{padding-left:1.5rem;margin:1rem 0}.prose li{font-size:1rem;line-height:1.7;margin:.6rem 0}.prose details p{padding-top:1rem}.topic-photo{margin:1.5rem 0 2rem;min-width:0}.topic-photo img{display:block;width:100%;height:auto;max-height:520px;object-fit:cover;aspect-ratio:1.7}.topic-photo figcaption{padding:.65rem 0;font-size:.8rem;line-height:1.5}.topic-photo a{text-decoration:underline;text-underline-offset:3px}.news-front .topic-photo img{aspect-ratio:1.45}.knowledge-main>.topic-photo img{aspect-ratio:2.4;max-height:300px}.lab-page>.topic-photo img{aspect-ratio:2.4;max-height:300px}.poster-hero{position:relative;display:grid;grid-template-columns:1.1fr 1fr;gap:20px;align-items:center}.poster-hero>h1{grid-column:1;font-size:clamp(2.8rem,5vw,5.5rem);position:relative;z-index:1}.poster-hero>.topic-photo{grid-column:2;grid-row:1/5;margin:0}.poster-hero>.topic-photo img{aspect-ratio:.9;max-height:670px}.poster-hero>.poster-arrow{position:static;font-size:4rem;grid-column:1;width:fit-content}.poster-hero>p{grid-column:1}.atlas-main>.topic-photo img{aspect-ratio:2.4;max-height:330px}.map-cell{min-height:200px}.topic-map{grid-auto-rows:minmax(190px,auto)}.paper-content>.topic-photo img{aspect-ratio:1.8}.journey-intro .topic-photo{max-width:820px}.question-aside .topic-photo img{aspect-ratio:.95}.directory-page>.topic-photo img{aspect-ratio:3.2;max-height:280px}.extra-page{padding-top:40px;padding-bottom:80px}.extra-page>h1{font-size:clamp(2.7rem,5vw,4.5rem)}.practice-tool{padding:clamp(20px,4vw,42px);border:1px solid currentColor;margin:24px 0 40px;max-width:920px}.practice-tool h2{font-size:clamp(1.8rem,3vw,2.7rem);margin:12px 0;line-height:1.15}.practice-tool p{line-height:1.6}.practice-tool .tool-inputs{display:flex;gap:18px;flex-wrap:wrap;margin:24px 0}.practice-tool label{display:block;flex:1;min-width:130px;line-height:1.5}.practice-tool input[type=number],.practice-tool textarea{display:block;width:100%;box-sizing:border-box;padding:12px;margin-top:8px;font:inherit;color:#161616;background:#fff;border:1px solid #888}.practice-tool output{display:block;font-size:1.35rem;line-height:1.55;margin:22px 0;white-space:pre-line}.tool-note{font-size:.875rem}.saved-checks{display:grid;gap:16px;margin:25px 0}.saved-checks label{display:flex;gap:10px;align-items:flex-start}.saved-checks input{width:20px;height:20px;flex:none;accent-color:var(--accent)}.practice-tool textarea{resize:vertical}.page-tool.design-laboratory,.page-about.design-laboratory{background:#14191c;color:#f1f5f3}.page-home .gallery-intro h1{font-size:clamp(3rem,6vw,6rem)}.prose .sources a{overflow-wrap:anywhere}.article-head h1,.dictionary-head h1{overflow-wrap:anywhere}img{max-width:100%}[hidden]{display:none!important}.question-row summary strong{font-size:1.1rem}.directory-table td p{font-size:.9rem;line-height:1.5}.notebook-tabs{flex-wrap:wrap}.page-catalog .cards{margin-top:25px}.gallery-article-header .topic-photo{margin:0}.hint{font-size:.875rem;line-height:1.5}.progress-line{gap:16px;flex-wrap:wrap}.progress-line span{white-space:normal}
@media(max-width:700px){.mast{display:block;padding:20px}.mast nav{margin-top:18px;max-height:90px;overflow:auto}.site-footer{padding:24px;display:block}.site-footer nav{margin-top:16px}.poster-hero{display:block;padding:26px 22px}.poster-hero>h1{font-size:3.25rem}.poster-hero>.topic-photo{margin-top:22px}.poster-hero>.topic-photo img{aspect-ratio:1.5;max-height:330px}.poster-hero>.poster-arrow{font-size:3rem}.article-head h1,.dictionary-head h1{font-size:2.55rem;line-height:1.12}.prose h2{font-size:1.5rem}.prose p{font-size:1rem}.topic-photo img{aspect-ratio:1.5}.paper-content>.topic-photo img{aspect-ratio:1.4}.directory-page>.topic-photo img{aspect-ratio:1.8}.practice-tool{padding:20px}.practice-tool .tool-inputs{display:grid;grid-template-columns:1fr}.practice-tool label{min-width:0}.question-aside .topic-photo img{aspect-ratio:1.8}.newspaper-title{font-size:3rem!important}.atlas-top h1{font-size:2.7rem!important}.journey-intro h1{font-size:2.8rem!important}.knowledge-main h1{font-size:2.6rem}.notebook-tabs{gap:6px}.notebook-tabs a{font-size:.875rem}.paper-content h1{font-size:2.6rem}.directory-table{overflow:auto}.directory-table table{min-width:550px}.extra-page{padding:26px 20px}.brand small{font-size:.8rem}.lab-page>h1{font-size:2.7rem}.gallery-intro h1{font-size:2.9rem!important}.question-page h1{font-size:2.8rem}.step-check{font-size:.9rem;line-height:1.5}}
@media(max-width:700px){.notebook-tabs{flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;padding:0;margin:0 0 0 12px}.notebook-tabs a{flex:none;white-space:nowrap}.paper{grid-template-columns:minmax(0,1fr)}.paper-margin{display:none}.paper:before{display:none}.paper-content{padding:26px 20px}.paper-content .article-head h1{font-size:2.3rem}.notebook-shell{margin-top:0}.atlas-main{min-width:0}.topic-map{grid-template-columns:minmax(0,1fr)}.map-cell{grid-column:auto!important;grid-row:auto!important;min-width:0}.map-cell h2{overflow-wrap:anywhere}}
@media(max-width:700px){.alphabet{flex-wrap:wrap;gap:6px}.news-front>aside:first-child{grid-template-columns:repeat(2,minmax(0,1fr));min-width:0}.news-brief{min-width:0;overflow-wrap:anywhere}}
:root{--accent:#ab693b;--on-accent:#111111}
.prose .answer>summary>h2{display:inline;font:inherit;letter-spacing:inherit}