html{scroll-behavior:smooth}body{margin:0}img{max-width:100%}[hidden]{display:none!important}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Layout: журнальная колонка ~68 знаков, слева на широком экране — оглавление; список статей — сетка карточек по рубрикам */
:root{
  --bg:#f6f5f2; --paper:#ffffff; --ink:#1b1c1f; --muted:#62656d; --line:#e4e2dc; --soft:#f0eee9;
  --brand:#e65100; --brand-2:#ff8a3d; --brand-soft:#fff1e8; --grid:rgba(27,28,31,.045);
  --ok:#22a06b; --ok-soft:#e5f6ee;
  --f-display:"Unbounded","Inter",system-ui,sans-serif;
  --f-body:"Inter",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --f-read:"Source Serif 4",Georgia,"Times New Roman",serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#141518; --paper:#1d1e22; --ink:#eceae6; --muted:#a2a4aa; --line:#2c2e33; --soft:#25272c;
  --brand:#ff7a2e; --brand-2:#ffa060; --brand-soft:#33221a; --grid:rgba(255,255,255,.04); --ok:#3dd68c; --ok-soft:#173326; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#141518; --paper:#1d1e22; --ink:#eceae6; --muted:#a2a4aa; --line:#2c2e33; --soft:#25272c;
  --brand:#ff7a2e; --brand-2:#ffa060; --brand-soft:#33221a; --grid:rgba(255,255,255,.04); --ok:#3dd68c; --ok-soft:#173326; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.55}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--bg)}
a{color:inherit}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;margin:0;letter-spacing:-.01em}
.wrap{max-width:1200px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand-2),var(--brand));color:#fff;display:grid;place-items:center;font-family:var(--f-display);font-weight:700;font-size:16px;flex:none}
.btn{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 16px;border-radius:11px;font-weight:600;text-decoration:none;font-size:14px;background:var(--brand);color:#fff}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid var(--brand-2);outline-offset:2px}
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:22px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--f-display);font-weight:700;font-size:17px;text-decoration:none}
.top nav{display:flex;gap:20px;margin-left:auto;font-size:14px;color:var(--muted)}
.top nav a{text-decoration:none}.top nav a.on{color:var(--ink);font-weight:600}

/* список статей */
.b-hero{padding-block:56px 32px;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px;border-bottom:1px solid var(--line)}
.b-hero h1{font-size:clamp(30px,4vw,48px);margin-top:12px}
.b-hero p{color:var(--muted);font-size:18px;max-width:60ch;margin:14px 0 0}
.cats{display:flex;gap:8px;flex-wrap:wrap;margin-top:26px}
.cats button{all:unset;cursor:pointer;padding:8px 14px;border-radius:20px;border:1px solid var(--line);background:var(--paper);font-size:14px;font-weight:500}
.cats button[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:#fff}
.lead-post{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:0;background:var(--paper);border:1px solid var(--line);border-radius:20px;overflow:hidden;margin-block:40px 28px;text-decoration:none}
.lead-post .cover{min-height:300px}
.lead-post .txt{padding:36px;display:flex;flex-direction:column;gap:14px}
.lead-post h2{font-size:clamp(22px,2.4vw,30px);line-height:1.2}
.lead-post p{margin:0;color:var(--muted)}
.meta{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.chip{align-self:flex-start;font-family:var(--f-mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--brand);background:var(--brand-soft);padding:3px 8px;border-radius:6px}
.posts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;padding-bottom:72px}
.post{background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;text-decoration:none;min-width:0}
.post .cover{height:150px}
.post .txt{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post h3{font-size:16.5px;line-height:1.3;font-weight:500}
.post p{margin:0;color:var(--muted);font-size:14.5px}
.post .meta{margin-top:auto}
.post.draft{opacity:.72}
.post.draft .chip{background:var(--soft);color:var(--muted)}
/* обложки — чертёжные схемы на CSS */
.cover{position:relative;background:var(--brand-soft);overflow:hidden}
.cover::before{content:"";position:absolute;inset:0;background-image:linear-gradient(color-mix(in srgb,var(--brand) 14%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--brand) 14%,transparent) 1px,transparent 1px);background-size:20px 20px}
.cover span{position:absolute;left:20px;bottom:16px;font-family:var(--f-display);font-weight:700;font-size:56px;line-height:1;color:var(--brand);opacity:.9}
.cover.c-gates i{position:absolute;bottom:34%;height:10px;border-radius:5px;background:var(--brand)}
.cover.c2{background:var(--soft)}.cover.c2 span{color:var(--ink);opacity:.8}

/* статья */
.crumbs{font-size:13px;color:var(--muted);padding-top:28px}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--ink)}
.a-head{max-width:820px;padding-block:20px 28px}
.a-head h1{font-size:clamp(28px,3.6vw,46px);line-height:1.12;margin-top:14px}
.a-head .sub{font-family:var(--f-read);font-size:20px;color:var(--muted);margin:16px 0 18px;max-width:62ch}
.a-grid{display:grid;grid-template-columns:230px minmax(0,1fr) 260px;gap:48px;align-items:start;padding-bottom:80px}
.toc{position:sticky;top:calc(env(safe-area-inset-top,0px) + 88px);font-size:13.5px;display:flex;flex-direction:column;gap:2px}
.toc b{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:8px}
.toc a{text-decoration:none;color:var(--muted);padding:5px 0 5px 12px;border-left:2px solid var(--line)}
.toc a:hover{color:var(--ink);border-color:var(--brand)}
article{font-family:var(--f-read);font-size:19px;line-height:1.68;max-width:68ch;min-width:0}
article h2{font-size:24px;line-height:1.25;margin:44px 0 14px;scroll-margin-top:90px}
article h3{font-family:var(--f-body);font-size:18px;font-weight:700;margin:28px 0 8px}
article p{margin:0 0 16px}
article ul,article ol{margin:0 0 18px;padding-left:22px}
article li{margin-bottom:6px}
article strong{font-weight:600}
.tldr{font-family:var(--f-body);font-size:16px;line-height:1.6;background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:20px 22px;margin-bottom:28px}
.tldr b{display:block;font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);font-weight:500;margin-bottom:8px}
.tldr ul{margin:0;padding-left:18px}
.tbl{overflow-x:auto;margin:8px 0 24px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.tbl table{border-collapse:collapse;width:100%;min-width:540px;font-family:var(--f-body);font-size:14.5px;line-height:1.45}
.tbl th{text-align:left;background:var(--soft);font-weight:600;padding:10px 12px;font-size:12.5px;color:var(--muted)}
.tbl td{padding:10px 12px;border-top:1px solid var(--line);vertical-align:top}
.tbl td:first-child{font-family:var(--f-mono);font-size:12px;color:var(--brand);white-space:nowrap}
.note{font-family:var(--f-body);font-size:15px;background:var(--soft);border-radius:12px;padding:16px 18px;margin:0 0 20px}
.inline-cta{font-family:var(--f-body);display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;background:var(--brand-soft);border-radius:14px;padding:20px 22px;margin:28px 0}
.inline-cta b{display:block;font-size:16px}
.inline-cta span{font-size:14.5px;color:var(--muted)}
article details{font-family:var(--f-body);font-size:16px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}
article summary{cursor:pointer;font-weight:600}
article details p{margin:8px 0 0;color:var(--muted)}
.aside{position:sticky;top:calc(env(safe-area-inset-top,0px) + 88px);display:flex;flex-direction:column;gap:16px}
.box{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:10px;font-size:14px}
.box b{font-size:15px}
.box span{color:var(--muted)}
.box a.more{text-decoration:none;font-weight:500;padding:6px 0;border-top:1px solid var(--line)}
.box a.more:first-of-type{border-top:0}
.author{display:flex;gap:12px;align-items:center;font-size:14px}
.author i{width:40px;height:40px;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-style:normal;font-weight:700;color:var(--muted)}
.author small{display:block;color:var(--muted)}
footer{border-top:1px solid var(--line);padding-block:28px;color:var(--muted);font-size:13.5px}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media (max-width:1100px){.a-grid{grid-template-columns:minmax(0,1fr) 250px}.toc{display:none}}
@media (max-width:860px){
  .a-grid{grid-template-columns:minmax(0,1fr)}.aside{position:static}
  .posts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lead-post{grid-template-columns:minmax(0,1fr)}.lead-post .cover{min-height:180px}
  .top nav{display:none}.top .btn{margin-left:auto}
}
@media (max-width:560px){
  .posts{grid-template-columns:minmax(0,1fr)}
  article{font-size:17.5px}
  .lead-post .txt{padding:24px}
  .inline-cta{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* кнопка темы в шапке */
.theme-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:var(--paper);color:var(--ink);display:grid;place-items:center;cursor:pointer;flex:none;padding:0}
.theme-btn:hover{border-color:var(--brand);color:var(--brand)}
.theme-btn .sun{display:none}
.top .wrap a:has(.cta-long){gap:.3em}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .theme-btn .sun{display:block}:root:not([data-theme="light"]) .theme-btn .moon{display:none}}
:root[data-theme="dark"] .theme-btn .sun{display:block}:root[data-theme="dark"] .theme-btn .moon{display:none}

@media (max-width:860px){.top .theme-btn{margin-left:auto}.top .wrap .btn{margin-left:0}}
@media (max-width:560px){.top .wrap{gap:10px}.top .cta-long{display:none}}

/* заявка «Начать бесплатно» */
dialog.lead{position:fixed;inset:0;margin:auto;height:fit-content;max-height:calc(100dvh - 32px);overflow:auto;border:0;padding:0;border-radius:20px;width:min(520px,calc(100% - 32px));background:var(--paper);color:var(--ink);box-shadow:0 30px 80px rgba(0,0,0,.35)}
dialog.lead::backdrop{background:rgba(20,16,10,.55);backdrop-filter:blur(3px)}
.lead form,.lead .done{padding:28px;display:flex;flex-direction:column;gap:14px}
.lead h2{font-size:22px}
.lead p{margin:0;color:var(--muted);font-size:14.5px}
.lead label{display:flex;flex-direction:column;gap:6px;font-size:13.5px;font-weight:600}
.lead input,.lead select,.lead textarea{font:inherit;font-weight:400;font-size:15px;padding:11px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.lead input:focus,.lead select:focus,.lead textarea:focus{outline:2px solid var(--brand);outline-offset:0;border-color:var(--brand)}
.lead .row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
.lead .err{color:var(--bad);font-size:12.5px;font-weight:500;min-height:0}
.lead .trap{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.lead .x{position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:10px;border:0;background:var(--soft);color:var(--ink);font-size:18px;cursor:pointer}
.lead .btn{width:100%;height:46px}
.lead .small{font-size:12px;color:var(--muted)}
.lead .done b{font-size:44px;line-height:1;color:var(--ok)}
@media (max-width:560px){.lead .row2{grid-template-columns:minmax(0,1fr)}}
.btn-primary{background:var(--brand);color:#fff}
:root{--bad:#e5484d}