:root{color-scheme:light;--ink:#202b27;--muted:#6f7b75;--line:#e3e9e4;--paper:#fff;--canvas:#f5f7f4;--green:#287a58;--green-soft:#e8f3ec;--gold:#c69145;--shadow:0 10px 30px rgba(31,57,43,.06)}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font:15px/1.55 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input{font:inherit}.layout{min-height:100vh;display:grid;grid-template-columns:305px minmax(0,1fr)}.sidebar{height:100vh;position:sticky;top:0;overflow:auto;background:var(--paper);border-right:1px solid var(--line);padding:24px 14px 18px}.brand{display:flex;align-items:center;gap:11px;padding:0 9px 21px}.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;color:#fff;background:var(--green);font-weight:750;font-size:12px;letter-spacing:-.04em}.brand-title{display:block;font-weight:700;font-size:14px;line-height:1.2}.brand-subtitle{display:block;color:var(--muted);font-size:12px;margin-top:4px}.nav-label{padding:8px 10px;color:#919b95;text-transform:uppercase;font-weight:700;letter-spacing:.09em;font-size:10px}.tree-nav{display:block}.tree-nav button{border:0;background:transparent;color:#526159;cursor:pointer}.tree-nav button:hover{background:#f4f7f4}.tree-root,.tree-folder{width:100%;display:flex;align-items:center;gap:9px;text-align:left;padding:8px 10px;border-radius:8px;font-size:13px}.tree-root.active,.tree-article.active{background:var(--green-soft);color:var(--green);font-weight:650}.tree-count{margin-left:auto;color:#9aa59e;font-size:11px}.tree-folder summary{list-style:none;display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:8px;color:#526159;cursor:pointer;font-size:13px}.tree-folder summary::-webkit-details-marker{display:none}.tree-folder summary:before{content:'›';color:#98a39c;transition:transform .15s}.tree-folder[open]>summary:before{transform:rotate(90deg)}.tree-children{margin:1px 0 8px 18px;padding-left:8px;border-left:1px solid #e4ebe6}.tree-article{display:block;width:100%;padding:8px 9px;border-radius:7px;text-align:left;font-size:12px;line-height:1.4}.mobile-nav-toggle{display:none}.side-note{margin:30px 8px 0;padding:13px;border:1px solid var(--line);border-radius:12px;color:var(--muted);font-size:12px}.side-note strong{display:block;color:var(--ink);font-size:12px;margin-bottom:4px}.main{min-width:0}.topbar{height:70px;padding:0 clamp(20px,4vw,56px);background:rgba(255,255,255,.84);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;position:sticky;top:0;z-index:2;backdrop-filter:blur(12px)}.crumb{color:var(--muted);font-size:13px}.search-wrap{width:min(340px,50%);position:relative}.search-wrap span{position:absolute;left:13px;top:8px;color:#8b9790}.search{width:100%;height:38px;border:1px solid var(--line);border-radius:9px;background:#fff;padding:0 12px 0 36px;outline:none}.search:focus{border-color:#8eb7a0;box-shadow:0 0 0 3px rgba(40,122,88,.09)}.content{width:min(100%,1050px);margin:0 auto;padding:43px clamp(24px,5vw,72px) 72px}.article-page{max-width:820px}.breadcrumb{color:var(--muted);font-size:12px;margin-bottom:23px}.eyebrow{display:flex;align-items:center;gap:8px;color:var(--green);font-size:12px;font-weight:700;letter-spacing:.055em;text-transform:uppercase}.eyebrow i{width:7px;height:7px;background:var(--gold);border-radius:50%}h1{font-size:clamp(27px,3.2vw,36px);line-height:1.18;letter-spacing:-.035em;margin:10px 0 15px}.intro{max-width:670px;color:var(--muted);font-size:16px;margin:0 0 22px}.article-meta{display:flex;align-items:center;gap:8px;color:#718078;font-size:12px;margin:-2px 0 22px}.article-meta strong{color:#38463e;font-weight:650}.article-summary{color:#58675f;font-size:16px;line-height:1.65;margin:0 0 28px}.article-section{padding:17px 0;border-top:1px solid var(--line)}.article-section h2{font-size:14px;margin:0 0 7px;color:#728078}.article-section p{margin:0;color:#29352f;line-height:1.7}.screenshots{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-top:13px}.screenshot{margin:0}.screenshot button{display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#f4f6f4;cursor:zoom-in}.screenshot img{display:block;width:100%;max-height:330px;object-fit:contain}.screenshot figcaption{padding-top:7px;color:var(--muted);font-size:12px}.image-viewer{display:none;position:fixed;inset:0;background:rgba(17,24,20,.88);z-index:10;align-items:center;justify-content:center;padding:30px;cursor:zoom-out}.image-viewer.open{display:flex}.image-viewer img{max-width:min(100%,1400px);max-height:100%;object-fit:contain;border-radius:6px}.image-viewer button{position:fixed;top:18px;right:22px;border:0;background:#fff;color:#243129;border-radius:50%;width:38px;height:38px;font-size:22px;cursor:pointer}.index-list{margin-top:27px;border-top:1px solid var(--line)}.index-link{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;display:block;padding:15px 2px;text-align:left;cursor:pointer}.index-link:hover strong{color:var(--green)}.index-link strong{display:block;color:var(--ink);font-size:14px;margin-bottom:4px}.index-link span{display:block;color:var(--muted);font-size:12px;line-height:1.5}.empty-state{padding:24px;border:1px dashed #ccd7cf;border-radius:12px;background:#fff;color:var(--muted)}.footer{margin-top:37px;padding-top:16px;border-top:1px solid var(--line);color:#96a098;font-size:11px}.landing{min-height:100vh;display:flex;flex-direction:column}.landing-bar{padding:20px clamp(22px,6vw,76px);display:flex;align-items:center;gap:12px;background:#fff;border-bottom:1px solid var(--line)}.landing-body{width:min(1040px,100%);margin:auto;padding:64px clamp(22px,6vw,76px);flex:1}.landing-body h1{font-size:clamp(34px,5vw,50px)}.landing-body>p{color:var(--muted);font-size:17px;max-width:650px}.section-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:34px}.section-card{display:block;padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px;color:var(--ink);text-decoration:none;box-shadow:var(--shadow);transition:transform .16s,border-color .16s}.section-card:hover{transform:translateY(-2px);border-color:#b8d0c0}.section-card strong{display:block;font-size:17px}.section-card span{display:block;color:var(--muted);font-size:13px;margin-top:7px}.landing-note{color:#8c9891;font-size:12px;margin-top:18px}@media(max-width:820px){.layout{grid-template-columns:265px minmax(0,1fr)}.sidebar{padding:18px 10px}.topbar{padding:0 20px}.content{padding:32px 22px 56px}}@media(max-width:640px){.layout{display:block}.sidebar{position:relative;height:auto;max-height:none;overflow:visible;border-right:0;border-bottom:1px solid var(--line);padding:12px 15px}.brand{padding:0 2px 10px}.nav-label,.side-note{display:none}.mobile-nav-toggle{display:flex;align-items:center;gap:8px;width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;color:#526159;text-align:left;cursor:pointer}.mobile-nav-toggle span:last-child{margin-left:auto;color:var(--muted);font-size:12px}.tree-nav{display:none;max-height:34vh;overflow:auto;margin-top:8px}.sidebar.nav-open .tree-nav{display:block}.topbar{height:auto;min-height:58px;padding:10px 15px;position:sticky}.crumb{display:none}.search-wrap{width:100%;max-width:none}.content{padding:28px 20px 50px}.article-summary{font-size:15px}.section-grid{grid-template-columns:1fr}.landing-body{padding-top:42px}.image-viewer{padding:14px}}

.landing-group-title{font-size:17px;margin:34px 0 -18px;letter-spacing:-.01em}


/* Фирменная палитра СТРОЙТЭКС: графит, белый и красный акцент */
:root{--ink:#252525;--muted:#707070;--line:#e5e5e5;--paper:#fff;--canvas:#f6f6f6;--green:#c3262e;--green-soft:#fae9ea;--gold:#c3262e;--shadow:0 10px 30px rgba(30,30,30,.06)}
.brand-mark{background:#c3262e;border-radius:8px}
.tree-nav button:hover{background:#f5f5f5}
.tree-folder:hover,.tree-folder.expanded{background:#f7f7f7}
.tree-children{border-left-color:#e3e3e3}
.tree-article:hover{background:#f5f5f5}
.search:focus{border-color:#d47a7e;box-shadow:0 0 0 3px rgba(195,38,46,.09)}
.section-card:hover{border-color:#dca4a7}
.landing-group-title{border-left:3px solid #c3262e;padding-left:12px}

.global-search{margin:28px 0 38px;padding:22px;background:#fff;border:1px solid var(--line);border-top:3px solid #c3262e;border-radius:12px;box-shadow:var(--shadow)}
.global-search h2{margin:0;font-size:18px}.global-search>p{margin:5px 0 16px;color:var(--muted);font-size:13px}
.global-search-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.global-search-groups fieldset{min-width:0;margin:0;padding:10px 12px;border:1px solid var(--line);border-radius:9px}
.global-search-groups legend{padding:0 5px;color:var(--ink);font-weight:650;font-size:12px}
.global-search-groups label{display:flex;align-items:flex-start;gap:7px;margin:5px 0;color:#555;font-size:12px;line-height:1.4;cursor:pointer}
.global-search-groups input{margin:2px 0 0;accent-color:#c3262e}
.global-search-form{display:flex;gap:9px;margin-top:13px}
.global-search-input{position:relative;flex:1}.global-search-input span{position:absolute;left:12px;top:6px;color:#8b8b8b;font-size:20px}
.global-search-input input{width:100%;height:40px;padding:0 12px 0 35px;border:1px solid var(--line);border-radius:8px;outline:none}
.global-search-input input:focus{border-color:#d47a7e;box-shadow:0 0 0 3px rgba(195,38,46,.09)}
.global-search-form button{border:0;border-radius:8px;background:#c3262e;color:#fff;padding:0 18px;font-weight:650;cursor:pointer}
.global-search-form button:hover{background:#a91e26}.global-search-form button:disabled{opacity:.6;cursor:wait}
.global-search-status{min-height:20px;margin-top:9px;color:var(--muted);font-size:12px}
.global-search-result-count{margin:18px 0 0;color:var(--muted);font-size:12px}
.global-result{display:block;color:inherit;text-decoration:none}.global-result:hover{background:#faf6f6}.global-result span+span{margin-top:4px}
@media(max-width:640px){.global-search{padding:16px;margin:23px 0 30px}.global-search-groups{grid-template-columns:1fr}.global-search-form{flex-direction:column}.global-search-form button{height:40px}}

.global-search-filter{margin:0;border:1px solid var(--line);border-radius:8px;background:#fff}
.global-search-filter>summary{display:flex;align-items:center;gap:10px;padding:10px 12px;list-style:none;color:#555;font-size:13px;cursor:pointer}
.global-search-filter>summary::-webkit-details-marker{display:none}
.global-search-filter>summary:after{content:'⌄';margin-left:auto;color:var(--muted);font-size:17px}
.global-search-filter[open]>summary:after{content:'⌃'}
.global-search-filter>summary strong{margin-left:auto;color:#c3262e;font-size:12px;font-weight:600}
.global-search-filter .global-search-groups{padding:0 10px 10px}
@media(max-width:640px){
  .layout{display:block;padding-top:0}
  .sidebar{position:fixed;z-index:30;inset:0 auto 0 0;width:min(88vw,360px);height:100dvh;max-height:none;overflow-y:auto;transform:translateX(-105%);transition:transform .22s ease;padding:20px 14px 24px;box-shadow:12px 0 32px rgba(0,0,0,.14);border:0;border-right:1px solid var(--line)}
  .sidebar.nav-open{transform:translateX(0)}
  .sidebar .brand{padding:0 9px 16px}
  .sidebar .nav-label{display:block}
  .sidebar .mobile-nav-toggle{display:flex;justify-content:space-between;margin:0 0 12px;padding:8px 10px;border-color:#ead1d2;color:#a91e26;background:#fffafa}
  .sidebar .tree-nav{display:block;max-height:calc(100dvh - 145px);overflow-y:auto;margin-top:4px}
  .mobile-nav-backdrop{display:none;position:fixed;inset:0;z-index:25;border:0;background:rgba(20,20,20,.42)}
  .sidebar.nav-open+.mobile-nav-backdrop{display:block}
  .topbar{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;min-height:62px;padding:9px 14px;z-index:5}
  .topbar .search-wrap{grid-column:1;grid-row:1;width:100%;max-width:none}
  .mobile-menu-open{grid-column:2;grid-row:1;display:flex;align-items:center;justify-content:center;gap:6px;height:40px;padding:0 11px;border:1px solid #e3b9bb;border-radius:8px;background:#fff;color:#a91e26;font-size:13px;font-weight:650;cursor:pointer;white-space:nowrap}
  .mobile-menu-open span:first-child{font-size:17px;line-height:1}
  .mobile-menu-open:active{background:#fae9ea}
}
@media(prefers-reduced-motion:reduce){.sidebar{transition:none}}

.mobile-menu-open{display:none}


/* Светлая палитра СТРОЙТЭКС: тёмно-синий логотип и оранжевые акценты */
:root{--ink:#18234a;--muted:#68728b;--line:#e5e9f1;--paper:#fff;--canvas:#f7f8fc;--green:#e98222;--green-soft:#fff0df;--gold:#f39a36;--shadow:0 10px 30px rgba(24,35,74,.07)}
.brand-logo{display:block;width:44px;height:44px;flex:0 0 44px;object-fit:cover;border-radius:8px}
.brand-mark{background:#0b153d;border-radius:9px}
.tree-nav button{color:#46516c}.tree-nav button:hover{background:#fff7ed}
.tree-root.active,.tree-article.active{background:#fff0df;color:#a9500b}
.tree-folder:hover,.tree-folder.expanded{background:#fff8ef}.tree-folder.expanded{color:#713c0c}
.tree-icon,.tree-arrow{color:#ba783a}.tree-children{border-left-color:#f0d9c1}
.tree-article:hover{background:#fff7ed;color:#713c0c}
.eyebrow{color:#b75c0c}.eyebrow i{background:#f39a36}
.search:focus,.global-search-input input:focus{border-color:#eea24d;box-shadow:0 0 0 3px rgba(233,130,34,.13)}
.section-card:hover{border-color:#f0bd82}.global-search{border-top-color:#e98222}
.global-search-form button{background:#e98222}.global-search-form button:hover{background:#c96b12}
.global-search-filter>summary strong{color:#b75c0c}
.global-search-groups input{accent-color:#e98222}
.landing-group-title{border-left-color:#e98222}
@media(max-width:640px){.mobile-menu-open{border-color:#efc08f;color:#a9500b;background:#fffaf4}.sidebar .mobile-nav-toggle{border-color:#efc08f;color:#a9500b;background:#fffaf4}}

/* Защита размеров логотипа и видимости мобильной кнопки */
.brand-logo{width:44px;height:44px;max-width:44px;max-height:44px;object-fit:cover;flex:none}
.landing-bar .brand-logo{width:48px;height:48px;max-width:48px;max-height:48px;flex-basis:48px}
@media(max-width:640px){.mobile-menu-open{display:flex}}