/* spb-montazh — журнал строймонтажа. Бетон, сигнальный жёлтый, чертёжная сетка. */
:root{
  --bg:#f2f3f4; --panel:#ffffff; --ink:#1d2124; --ink-soft:#5c666d;
  --concrete:#2f3336; --concrete-2:#454b4f; --signal:#e5b022; --signal-soft:#fdf3d8;
  --line:#d6dade; --grid:rgba(47,51,54,.055);
  --shadow:0 1px 0 rgba(29,33,36,.05), 0 10px 26px -20px rgba(29,33,36,.6);
  --wrap:1120px;
}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);background:
  linear-gradient(var(--grid) 1px,transparent 1px) 0 0/28px 28px,
  linear-gradient(90deg,var(--grid) 1px,transparent 1px) 0 0/28px 28px,
  var(--bg);
  font:400 17px/1.65 'Roboto Serif',Georgia,serif}
img{max-width:100%;height:auto;display:block}
a{color:#1f5f8b;text-underline-offset:2px}
a:hover{color:#b8860b}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}

h1,h2,h3{font-family:'Noto Sans Display',system-ui,sans-serif;font-weight:700;line-height:1.18;letter-spacing:-.01em}
h1{font-size:clamp(27px,4.2vw,40px);margin:0 0 14px}
h2{font-size:clamp(21px,2.9vw,28px);margin:36px 0 12px}
h3{font-size:19px;margin:24px 0 8px}
.num,.tag,.utility,.crumbs,thead th,.stat b,.kicker,.sib b{font-family:'Prosto One',system-ui,sans-serif;font-weight:400}

.utility{background:var(--concrete);color:#ced4d8;font-size:13.5px}
.utility .wrap{display:flex;justify-content:space-between;gap:12px;padding-block:7px;flex-wrap:wrap}

.site-head{background:var(--panel);border-bottom:2px solid var(--concrete);position:sticky;top:0;z-index:20}
.head-row{display:flex;align-items:center;gap:18px;padding-block:13px;flex-wrap:wrap}
.logo{font-family:'Noto Sans Display',sans-serif;font-size:21px;font-weight:700;color:var(--concrete);
  text-decoration:none;line-height:1.1;text-transform:uppercase;letter-spacing:.04em}
.logo small{display:block;font-family:'Prosto One',sans-serif;font-size:11.5px;letter-spacing:.02em;
  text-transform:none;color:var(--ink-soft)}
.nav{margin-left:auto;display:flex;gap:17px;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;font-size:15px;padding:4px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a.on{border-bottom-color:var(--signal)}
.menu{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:4px;
  padding:7px 12px;font:inherit;font-size:14px}

.page-top{background:var(--panel);border-bottom:1px solid var(--line);padding-block:26px 30px}
.crumbs{font-size:13px;color:var(--ink-soft);margin-bottom:10px;text-transform:uppercase;letter-spacing:.03em}
.crumbs a{color:var(--ink-soft)}
.lead{font-size:18px;color:var(--ink-soft);margin:0;max-width:62ch}

.hero{background:var(--concrete);color:#e6eaed;padding-block:46px}
.hero h1{color:#fff}
.hero .lead{color:#c3cbd1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}
.tag{display:inline-block;background:var(--signal);color:#2b2308;padding:4px 11px;font-size:12.5px;
  margin-bottom:12px;text-transform:uppercase;letter-spacing:.05em}
.button{display:inline-block;background:var(--signal);color:#2b2308;text-decoration:none;
  padding:11px 20px;font-family:'Prosto One',sans-serif;margin-top:10px}
.button:hover{background:#f5cc4b;color:#2b2308}
.hero-visual img{box-shadow:var(--shadow)}

.section{padding-block:40px}
.section.panel{background:var(--panel);border-block:1px solid var(--line)}
.section-title{max-width:66ch;margin-bottom:20px}
.section-title p{color:var(--ink-soft);margin:8px 0 0}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--signal);
  padding:16px 18px 18px;text-decoration:none;color:inherit;display:block;box-shadow:var(--shadow)}
.card:hover{border-left-color:var(--concrete);color:inherit}
.card .num{display:block;font-size:12.5px;color:var(--ink-soft);margin-bottom:4px}
.card h3{margin:0 0 6px;font-size:18px}
.card p{margin:0;color:var(--ink-soft);font-size:15px}

.content-grid{display:grid;grid-template-columns:250px 1fr;gap:32px;align-items:start;padding-block:30px}
.passport{position:sticky;top:74px;display:grid;gap:14px}
.passport-box{background:var(--panel);border:1px solid var(--line);padding:15px}
.passport-box .kicker{font-size:12.5px;color:#a07c12;margin-bottom:8px;text-transform:uppercase;letter-spacing:.04em}
.passport-box dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 12px;font-size:14.5px}
.passport-box dt{color:var(--ink-soft)}
.passport-box dd{margin:0}
.author-mini{display:flex;gap:11px;align-items:center;background:var(--panel);border:1px solid var(--line);padding:12px}
.author-mini img{flex:0 0 auto}
.author-mini a{display:block;font-weight:500;text-decoration:none;font-family:'Noto Sans Display',sans-serif}
.author-mini small{color:var(--ink-soft);font-size:13px}

.prose{max-width:70ch}
.prose>img.cover{margin-bottom:22px;box-shadow:var(--shadow)}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose li{margin-bottom:7px}
.prose blockquote{margin:22px 0;padding:14px 18px;background:var(--signal-soft);border-left:4px solid var(--signal)}
.prose blockquote p:last-child{margin:0}

.table-wrap{overflow-x:auto;margin:0 0 22px}
table{border-collapse:collapse;width:100%;font-size:15px;background:var(--panel)}
thead th{background:var(--concrete);color:#e8ecef;text-align:left;font-weight:400;padding:9px 12px;
  font-size:13.5px;white-space:nowrap}
td,tbody th{border-bottom:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
tbody tr:nth-child(even){background:#f7f8f9}

.sib{margin:24px 0;border:1px solid var(--concrete);background:var(--panel)}
.sib b{display:block;background:var(--concrete);color:#fff;padding:7px 16px;font-size:14px;
  text-transform:uppercase;letter-spacing:.04em}
.sib p{margin:0;padding:14px 16px}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}
.stat{background:var(--panel);border:1px solid var(--line);padding:16px;color:var(--ink-soft);font-size:15px}
.stat b{display:block;font-size:29px;color:var(--concrete);line-height:1.1;margin-bottom:4px}

.author-page{display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:start;padding-block:30px}
.author-page img{box-shadow:var(--shadow)}

.footer{background:var(--concrete);color:#c9d0d5;margin-top:44px;padding-block:32px 20px;font-size:15px}
.footer a{color:#e9edf0;text-decoration:none}
.footer a:hover{color:var(--signal)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.foot-grid h3{color:#fff;font-size:19px;margin:0 0 8px}
.foot-grid b{display:block;margin-bottom:8px;font-family:'Prosto One',sans-serif;font-weight:400;color:var(--signal)}
.foot-grid a{display:block;margin-bottom:6px}
.foot-grid p{margin:0;color:#9daab2}
.copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:22px;padding-top:14px;font-size:13.5px;color:#8a99a2}

@media (max-width:900px){
  .hero-grid,.content-grid,.author-page,.foot-grid{grid-template-columns:1fr}
  .passport{position:static}
  .nav{display:none;width:100%;flex-direction:column;gap:8px}
  .nav.open{display:flex}
  .menu{display:block}
}