@charset "UTF-8";
:root{--paper:#fbfaf7;--ink:#20231f;--muted:#666c64;--accent:#6939ba;--line:#d6d8ce;--green:#eee7f8;--yellow:#f6dc56;--blue:#ede7f6;--max:1320px}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:18px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.18em}
a:hover{color:var(--accent)}
button,input{font:inherit}
button,a,input{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #2167b0;outline-offset:5px}
h1,h2,h3,p{margin:0}
h1,h2,h3{line-height:1.05;letter-spacing:-.045em;font-weight:700;text-wrap:balance}
h1{font-size:clamp(44px,7.4vw,106px)}
h2{font-size:clamp(30px,4vw,54px)}
h3{font-size:32px}
p{max-width:70ch}
main,.site-header{width:min(var(--max),calc(100% - 96px));margin-inline:auto}
.site-header{display:flex;align-items:center;gap:32px;padding:28px 0;border-bottom:1px solid var(--line);font-size:16px}
.brand{font-size:24px;font-weight:bold;letter-spacing:-.045em;text-decoration:none;display:flex;align-items:center;gap:9px}
.brand-mark{background:var(--accent);color:white;display:inline-grid;place-items:center;width:29px;height:29px;font-size:23px;line-height:1;padding-bottom:3px}
.site-header nav{display:flex;gap:25px;margin-left:auto}
.site-header nav a,.account{text-decoration:none}
.site-header nav .current{color:var(--accent)}
.account{border-left:1px solid var(--line);padding-left:28px}
.eyebrow{display:block;text-transform:uppercase;font-size:12px;line-height:1.45;letter-spacing:.105em;font-weight:bold}
.accent{color:var(--accent)}
.guide-hero{padding:64px 0 44px}
.guide-hero h1{margin:25px 0 36px}
.hero-bottom{display:flex;justify-content:space-between;align-items:flex-end;gap:28px}
.lead{font-size:clamp(20px,2.1vw,28px);line-height:1.35;letter-spacing:-.02em}
.aside-note{font-size:15px;color:var(--muted);flex-shrink:0;padding-bottom:3px}
.finder{padding:30px 0 42px;border-top:1px solid var(--line)}
.finder h2{font-size:24px;letter-spacing:-.02em;margin-bottom:18px}
.search-form{display:flex;gap:0;max-width:880px;border-bottom:2px solid var(--ink);background:white}
.search-form input{width:100%;min-width:0;border:0;background:transparent;padding:18px 14px;color:var(--ink);border-radius:0;outline-offset:-3px}
.search-form button{border:0;background:var(--ink);color:white;padding:14px 24px;white-space:nowrap}
.search-form button:hover{background:var(--accent)}
.search-help{font-size:14px;color:var(--muted);margin-top:10px}
.situations{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 28px;margin-top:30px}
.situations a{font-size:16px}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:38px}
.section-heading p{font-size:17px;color:var(--muted);max-width:34ch}
.catalog{padding-top:50px;border-top:1px solid var(--line)}
.chapter-nav{display:flex;flex-wrap:wrap;gap:10px 25px;margin-bottom:50px;font-size:14px}
.chapter{display:grid;grid-template-columns:1fr 2fr;gap:65px;padding:35px 0 42px;border-top:1px solid var(--ink)}
.chapter-number{font-size:14px;color:var(--accent);font-weight:bold;display:block;margin-bottom:18px}
.chapter-heading h3{max-width:15ch;font-size:34px;margin-bottom:16px}
.chapter-heading p{font-size:16px;max-width:29ch;color:var(--muted)}
.article-list{margin:0;padding:0;list-style:none}
.article-list li{border-bottom:1px solid var(--line)}
.article-list a{display:grid;grid-template-columns:1fr auto;padding:14px 0 16px;text-decoration:none;gap:4px 20px}
.article-list li:first-child a{padding-top:0}
.article-list span:first-child{font-size:22px;letter-spacing:-.025em;font-weight:500;line-height:1.2}
.article-list small{grid-column:1;font-size:15px;line-height:1.4;color:var(--muted)}
.row-arrow{font-size:22px;color:var(--accent)}
.editorial-note{background:var(--green);padding:44px 48px;margin:45px 0 80px;display:grid;grid-template-columns:1fr 1fr;gap:24px 60px}
.editorial-note .eyebrow{grid-column:1/-1}
.editorial-note h2{font-size:36px}
.editorial-note p{font-size:18px}
.editorial-note>a{grid-column:2}
.courses-section{padding:20px 0 75px}
.course-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.course{display:flex;flex-direction:column;padding:34px 36px;min-height:420px;text-decoration:none;color:var(--ink)!important;transition:box-shadow .15s}
.course:hover{box-shadow:inset 0 -5px var(--accent)}
.course-process{background:var(--green)}
.course-meta{background:var(--yellow)}
.course h3{font-size:clamp(28px,3.2vw,43px);margin:24px 0 16px}
.course p{font-size:18px;max-width:39ch}
.course .text-link{margin-top:auto;padding-top:28px;font-weight:bold}
.course-drawing{display:flex;align-items:center;gap:8px;margin:30px 0 10px;font-size:13px}
.course-drawing span{border:1px solid var(--ink);padding:13px 10px}
.course-drawing i{font-style:normal}
.meta-drawing{display:flex;gap:0;margin:28px 0 12px}
.meta-drawing span{border:1px solid var(--ink);border-radius:50%;height:82px;width:100px;display:grid;place-items:center;font-size:13px;background:var(--yellow)}
.meta-drawing span+span{margin-left:-9px}
.button{display:inline-block;background:var(--ink);color:white;padding:14px 22px;text-decoration:none;font-size:16px;white-space:normal}
.button:hover{background:var(--accent);color:white}
.tools-section{padding:25px 0 65px;border-top:1px solid var(--line)}
.reading{max-width:1200px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:12px;font-size:14px;color:var(--muted);padding-top:35px}
.article-header{padding:36px 0 46px;max-width:950px}
.article-header h1{font-size:clamp(38px,5.5vw,72px);margin:20px 0 24px;max-width:22ch}
.article-header .lead{max-width:43ch}
.reading-grid{display:grid;grid-template-columns:minmax(0,760px) 230px;gap:80px;align-items:start}
.article-body{min-width:0;font-size:20px;line-height:1.65}
.article-body section{margin-bottom:42px}
.article-body h2{font-size:31px;margin-bottom:18px;letter-spacing:-.035em;line-height:1.15}
.scene{padding:26px 30px;background:var(--green)}
.scene .eyebrow,.worked-example .eyebrow{margin-bottom:14px}
.steps{list-style:none;counter-reset:step;padding:0;margin:0}
.steps li{position:relative;padding-left:48px;margin:0 0 22px;counter-increment:step}
.steps li:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:4px;color:var(--accent);font-size:16px;font-weight:bold}
.worked-example{padding:26px 30px;border-left:3px solid var(--accent);background:#f1eee5}
.worked-example small{display:block;color:var(--muted);font-size:13px;line-height:1.5;margin-top:18px}
.reading-aside{position:sticky;top:24px;font-size:15px}
.toc{border-top:1px solid var(--ink);padding-top:15px;display:flex;flex-direction:column;gap:10px}
.toc .eyebrow{margin-bottom:8px}
.toc a{text-decoration:none}
.aside-course{margin-top:35px;border-top:1px solid var(--line);padding-top:18px}
.aside-course a{font-size:18px;line-height:1.25;display:block;margin:12px 0}
.aside-course p{font-size:14px;color:var(--muted)}
.template-block{background:var(--blue);padding:28px 30px}
.template-heading{display:flex;justify-content:space-between;align-items:center;gap:15px}
.template-heading h2{margin:8px 0 15px}
.copy-button{border:1px solid var(--ink);color:var(--ink);background:transparent;font-size:14px;padding:8px 12px}
.copy-button:hover{background:white}
pre{white-space:pre-wrap;overflow-wrap:anywhere;font:17px/1.9 Arial,Helvetica,sans-serif;margin:6px 0 20px}
.template-actions{display:flex;gap:24px;flex-wrap:wrap;font-size:15px}
.copy-status{font-size:14px;margin-top:10px}
.article-end{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:20px}
.article-end p+p{margin-top:5px}
.related{max-width:760px;padding:48px 0 75px}
.related h2{font-size:32px;margin-bottom:25px}
.back-link{display:inline-block;margin-top:25px;font-size:16px}
.info-page{max-width:1000px;padding-bottom:70px}
.info-page h1{font-size:clamp(40px,6vw,72px);margin:35px 0 25px}
.info-page>.lead{max-width:45ch;margin-bottom:35px}
.prose{max-width:720px;font-size:20px;line-height:1.65}
.prose h2{font-size:30px;margin:36px 0 15px}
.prose p{margin-bottom:20px}
.prose li{margin-bottom:18px}
.intro-text{margin-bottom:20px}
.template-section{margin-top:40px}
.template-section h2{font-size:28px;margin-bottom:18px}
.template-list{list-style:none;margin:0;padding:0}
.template-list li{display:flex;justify-content:space-between;gap:25px;border-bottom:1px solid var(--line);padding:15px 0}
.template-list li a:last-child{white-space:nowrap;font-size:14px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:20px;top:-100px;z-index:20;background:white;padding:10px}
.skip:focus{top:10px}
#search-results{margin:25px 0 35px;max-width:880px}
#search-status{font-size:15px;margin-bottom:20px}
[hidden]{display:none!important}

.course{min-width:0}
.course h3,.course p{overflow-wrap:anywhere}
.course-drawing,.meta-drawing{max-width:100%}

@media(max-width:760px){.course.course-meta h3{font-size:clamp(23px,6.67vw,30px)}
}

@media(min-width:1500px){.guide-hero h1{font-size:110px}
}

@media(max-width:1000px){main,.site-header{width:calc(100% - 56px)}
.site-header{gap:18px}
.site-header nav{gap:17px}
.account{padding-left:18px}
.reading-grid{grid-template-columns:minmax(0,1fr) 190px;gap:38px}
.chapter{gap:35px}
.course{padding:28px 26px}
.editorial-note{padding:35px;gap:25px}
}

@media(max-width:760px){main,.site-header{width:calc(100% - 40px)}
.site-header{flex-wrap:wrap;gap:17px 12px;padding:20px 0}
.brand{font-size:22px}
.site-header nav{order:3;flex-basis:100%;margin:0;gap:22px;font-size:15px}
.account{margin-left:auto;font-size:13px;border:0;padding:0}
.guide-hero{padding:40px 0 35px}
.guide-hero h1{margin:20px 0 25px;font-size:clamp(38px,9vw,64px)}
.hero-bottom{display:block}
.hero-bottom .aside-note{margin-top:23px;font-size:14px}
.lead{font-size:21px}
.finder{padding:25px 0 35px}
.finder h2{font-size:21px}
.search-form input{font-size:16px;padding:14px 10px}
.search-form button{padding:12px;font-size:15px}
.search-help{font-size:13px}
.situations{grid-template-columns:1fr 1fr;gap:16px 22px}
.situations a{font-size:15px}
.section-heading{display:block;margin-bottom:25px}
.section-heading p{margin-top:18px;font-size:16px}
.catalog{padding-top:35px}
.chapter-nav{gap:12px 18px;margin-bottom:30px}
.chapter{display:block;padding:25px 0 35px}
.chapter-heading{margin-bottom:25px}
.chapter-number{margin-bottom:8px}
.chapter-heading h3{font-size:30px;max-width:none;margin-bottom:10px}
.chapter-heading p{max-width:40ch}
.article-list span:first-child{font-size:21px}
.article-list small{font-size:14px}
.article-list a{padding:17px 0}
.editorial-note{display:block;padding:26px;margin:25px 0 45px}
.editorial-note h2{font-size:30px;margin:20px 0}
.editorial-note p{font-size:17px;margin-bottom:20px}
.editorial-note>a{font-size:16px}
.course-grid{grid-template-columns:1fr}
.course{min-height:370px;padding:28px}
.course h3{font-size:36px}
.courses-section{padding-bottom:45px}
.reading-grid{display:block}
.reading-aside{position:static;margin-top:30px;display:none}
.article-header{padding:28px 0}
.article-header h1{font-size:clamp(36px,7vw,54px)}
.article-header .lead{font-size:22px}
.article-body{font-size:18px;line-height:1.65}
.article-body h2{font-size:28px}
.article-body section{margin-bottom:32px}
.scene,.worked-example,.template-block{padding:22px}
.steps li{padding-left:37px}
.template-heading{align-items:flex-start;flex-wrap:wrap}
.copy-button{margin-bottom:10px}
pre{font-size:16px}
.related h2{font-size:29px}
.prose{font-size:18px}
.prose h2{font-size:27px}
.template-list li{gap:15px}
.template-list li a:first-child{font-size:17px}
.info-page h1{font-size:43px}
.template-section h2{font-size:27px}
.breadcrumb{font-size:13px}
.eyebrow{font-size:11px}
}

@media(max-width:360px){main,.site-header{width:calc(100% - 32px)}
.brand{font-size:21px}
.brand-mark{width:26px;height:26px}
.account{font-size:12px}
.site-header nav{gap:20px;font-size:14px}
.guide-hero h1{font-size:37px}
.situations{grid-template-columns:1fr}
.course{padding:22px}
.course h3{font-size:30px}
.course-drawing{gap:5px;font-size:11px}
.course-drawing span{padding:12px 8px}
.scene,.worked-example,.template-block{padding:18px}
.article-header h1{font-size:36px}
.info-page h1{font-size:37px}
.template-list li{flex-wrap:wrap;gap:6px}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*{transition:none!important}
}

@media print{body{background:white;color:black;font-size:12pt}
.site-header,.reading-aside,.related,.copy-button,.skip,.template-actions,.article-end{display:none}
main{width:100%;max-width:none}
.reading-grid{display:block}
.article-header h1{font-size:28pt}
.article-body{font-size:12pt}
.article-body h2{font-size:18pt}
.article-body section{break-inside:avoid}
.scene,.worked-example,.template-block{background:none;border:1px solid #aaa}
a{color:black}
.breadcrumb{display:none}
}


/* One identity; section accents: guide violet, tools blue, courses yellow. */
.brand-mark{display:block;width:34px;height:34px;padding:0;background:transparent;flex:none}
.course{background:var(--yellow)}
.course.course-meta{background:var(--yellow)}


/* Guide navigation and reading aids. */
.guide-hero{padding-bottom:36px}.guide-hero h1{font-size:clamp(44px,6.8vw,96px);margin:20px 0 28px}.finder{background:#eee7f6;padding:30px;border:0;border-radius:5px;margin-bottom:42px}.search-form{max-width:none;border:1px solid #9f8cb9;border-radius:3px}.search-form button{background:var(--accent)}.search-form input{padding:17px 18px}.search-help{display:flex;justify-content:space-between;gap:15px;align-items:center}.search-reset{border:0;background:transparent;padding:7px 0;font-size:14px;text-decoration:underline;color:var(--accent)}.situations{gap:12px 25px;margin-top:24px}.situations a{font-size:15px;line-height:1.4}.catalog{padding-top:42px}.topic-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:30px 0 44px}.topic-nav a{display:grid;grid-template-columns:20px 1fr;gap:8px 12px;padding:20px;border:1px solid var(--line);text-decoration:none;min-width:0}.topic-nav a:hover{background:#eee7f6;border-color:#b3a0ca}.topic-nav a>span{font-size:12px;color:var(--accent);padding-top:2px}.topic-nav strong{font-size:19px;line-height:1.25;letter-spacing:-.025em}.topic-nav small{grid-column:2;font-size:13px;color:var(--muted);display:flex;justify-content:space-between}.chapter{scroll-margin-top:24px}.article-shortcuts{display:flex;flex-wrap:wrap;gap:15px 25px;margin-top:24px;font-size:15px;color:var(--accent)}.mobile-toc{display:none}.article-body section{scroll-margin-top:24px}.article-header{padding-bottom:32px}.worked-example{background:#f3eff7}.search-help p{font-size:14px}#search-results{max-width:none}.course{border-radius:5px}
@media(max-width:760px){.guide-hero h1{font-size:clamp(37px,8.8vw,64px)}.guide-hero .lead br{display:none}.finder{padding:24px 20px;margin-bottom:30px}.finder h2{font-size:23px}.search-form input{padding:14px 10px}.search-help{align-items:flex-start;flex-wrap:wrap;gap:3px}.search-help p{font-size:13px}.situations{grid-template-columns:1fr;gap:0}.situations a{padding:11px 0;border-bottom:1px solid #d4c9e4}.topic-nav{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:30px}.topic-nav a{display:block;padding:17px 14px}.topic-nav strong{display:block;font-size:18px;margin:9px 0}.topic-nav small{font-size:12px}.catalog .section-heading h2{font-size:34px}.chapter-heading h3{font-size:29px}.mobile-toc{display:block;border-block:1px solid var(--line);margin:0 0 26px;padding:15px 0;font-size:16px}.mobile-toc summary{cursor:pointer;font-weight:700}.mobile-toc nav{display:flex;flex-direction:column;gap:6px;margin-top:15px}.mobile-toc nav a{padding:6px 0}.article-shortcuts{font-size:14px;margin-top:20px}.article-body section{scroll-margin-top:16px}.article-header{padding-bottom:26px}.article-header h1{font-size:clamp(35px,7.5vw,54px)}}
@media(max-width:360px){.finder{padding:21px 16px}.finder h2{font-size:21px}.search-form button{padding:12px 10px}.topic-nav strong{font-size:17px}.topic-nav a{padding:14px 11px}}
@media print{.mobile-toc,.article-shortcuts{display:none}}
/* Long Russian headings must fit the smallest supported phone viewport. */
.article-header h1{hyphens:auto;overflow-wrap:anywhere}
@media(max-width:360px){.article-header h1{font-size:32px}}