:root{
  --ink-900:#0F2A43;
  --ink-950:#0A1E30;
  --ink-800:#1C3A57;
  --surface:#F4F5F3;
  --surface-white:#FFFFFF;
  --line:#DADFE3;
  --line-dark:rgba(255,255,255,0.14);
  --text-body:#243444;
  --text-muted:#5B6B7A;
  --text-inverse:#EAF0F5;
  --text-inverse-muted:#9BB0C2;
  --accent:#E0862B;
  --accent-ink:#4A2A08;
  --teal:#1F6F63;
  --radius:10px;
  --maxw:1180px;
  --maxw-article:760px;
  --font-sans:'IBM Plex Sans','Helvetica Neue',Arial,sans-serif;
  --font-mono:'IBM Plex Mono','SFMono-Regular',Menlo,monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--text-body);
  background:var(--surface-white);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
img,svg{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px;}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-0.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;}
}

/* header */
header{background:var(--ink-900);color:var(--text-inverse);border-bottom:1px solid var(--line-dark);}
.header-row{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:24px;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;}
.brand-mark{width:38px;height:38px;flex:none;}
.brand-name{font-size:17px;font-weight:600;line-height:1.2;}
.brand-sub{font-size:12px;color:var(--text-inverse-muted);font-weight:400;}
nav{display:flex;gap:28px;font-size:14px;}
nav a{text-decoration:none;color:var(--text-inverse-muted);}
nav a:hover,nav a[aria-current]{color:var(--text-inverse);}
.phone-cta{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,0.07);border:1px solid var(--line-dark);padding:9px 16px;border-radius:8px;font-size:14px;text-decoration:none;color:var(--text-inverse);white-space:nowrap;}

/* hero (home) */
.hero{background:var(--ink-900);color:var(--text-inverse);}
.hero-grid{display:grid;grid-template-columns:1.05fr 0.95fr;gap:40px;align-items:center;padding:64px 0 56px;}
.hero h1{font-size:38px;line-height:1.22;max-width:520px;}
.hero-lede{margin-top:18px;font-size:16px;color:var(--text-inverse-muted);max-width:460px;line-height:1.65;}
.hero-ctas{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap;}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:8px;font-size:14px;font-weight:500;text-decoration:none;border:1px solid transparent;cursor:pointer;}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{background:#C9741F;}
.btn-ghost{border-color:var(--line-dark);color:var(--text-inverse);}
.btn-ghost:hover{background:rgba(255,255,255,0.06);}
.schematic{width:100%;height:auto;}
.schematic text{font-family:var(--font-mono);fill:var(--text-inverse-muted);font-size:10px;}

/* page hero (inner pages) */
.page-hero{background:var(--ink-900);color:var(--text-inverse);padding:38px 0 30px;}
.breadcrumb{font-size:12.5px;color:var(--text-inverse-muted);margin-bottom:14px;}
.breadcrumb a{text-decoration:none;color:var(--text-inverse-muted);}
.breadcrumb a:hover{color:var(--text-inverse);}
.page-hero h1{font-size:28px;color:var(--text-inverse);max-width:640px;}
.page-hero .lede{margin-top:12px;font-size:15px;color:var(--text-inverse-muted);max-width:620px;line-height:1.6;}

/* stats strip */
.stats-strip{border-top:1px solid var(--line-dark);}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:20px 24px;border-right:1px solid var(--line-dark);}
.stat:last-child{border-right:none;}
.stat-num{font-family:var(--font-mono);font-size:22px;font-weight:500;color:var(--text-inverse);}
.stat-label{font-size:12.5px;color:var(--text-inverse-muted);margin-top:4px;}

/* section shell */
section{padding:64px 0;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px;}
.section-head h2{font-size:23px;}
.section-head p{font-size:14px;color:var(--text-muted);margin-top:6px;max-width:480px;}
.section-link{font-size:14px;color:var(--ink-900);text-decoration:underline;text-underline-offset:3px;white-space:nowrap;}

/* services grid */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.service-card{background:var(--surface-white);padding:26px 24px;border-left:3px solid var(--teal);text-decoration:none;color:inherit;display:block;}
.service-card[data-cat="power"]{border-left-color:var(--accent);}
.service-card h3{font-size:15px;font-weight:600;margin-top:14px;}
.service-card p{font-size:13.5px;color:var(--text-muted);margin-top:8px;line-height:1.55;}
.service-icon{width:26px;height:26px;color:var(--ink-900);}
.service-tag{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);letter-spacing:0.02em;}

/* projects */
.projects{background:var(--surface);}
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.project-grid.narrow{grid-template-columns:repeat(2,1fr);}
.project-card{background:var(--surface-white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:inherit;display:block;}
.project-photo{height:150px;background:var(--line);overflow:hidden;}
.project-photo img{width:100%;height:100%;object-fit:cover;}
.project-body{padding:16px 18px 20px;}
.project-tag{font-size:11px;font-family:var(--font-mono);color:var(--teal);}
.project-title{font-size:14.5px;margin-top:6px;line-height:1.4;}

/* partners */
.partners{border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.partners .wrap{display:flex;align-items:center;gap:22px;flex-wrap:wrap;padding:26px 32px;}
.partners-label{font-size:13px;color:var(--text-muted);margin-right:8px;}
.partner-name{font-size:14px;font-weight:500;color:var(--ink-800);}

/* article / prose (service + project detail pages) */
.article-wrap{max-width:var(--maxw-article);}
.article h2{font-size:19px;margin-top:36px;}
.article h2:first-child{margin-top:0;}
.article p{font-size:15px;line-height:1.7;color:var(--text-body);margin-top:14px;}
.article ul{margin:14px 0 0;padding-left:20px;font-size:15px;line-height:1.7;}
.article li{margin-top:6px;}
.article figure{margin:22px 0;}
.article figure img{border-radius:var(--radius);border:1px solid var(--line);}
.article figcaption{font-size:12.5px;color:var(--text-muted);margin-top:8px;}

/* two column layout: article + sidebar */
.content-grid{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start;}
.sidebar{position:sticky;top:24px;display:flex;flex-direction:column;gap:20px;}
.sidebar-card{background:var(--surface);border-radius:var(--radius);padding:20px;}
.sidebar-card h3{font-size:13px;color:var(--text-muted);font-weight:500;margin-bottom:12px;}
.sidebar-card ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;font-size:13.5px;}
.sidebar-card a{text-decoration:none;}
.sidebar-card a:hover{text-decoration:underline;}
.sidebar-cta{background:var(--ink-900);color:var(--text-inverse);border-radius:var(--radius);padding:22px 20px;}
.sidebar-cta p{font-size:13.5px;color:var(--text-inverse-muted);margin:6px 0 16px;line-height:1.55;}
.sidebar-cta .btn-primary{width:100%;justify-content:center;}

/* spec list */
.spec-list{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:16px;}
.spec-row{display:contents;}
.spec-row div{padding:11px 16px;font-size:13.5px;border-bottom:1px solid var(--line);}
.spec-row div:first-child{color:var(--text-muted);border-right:1px solid var(--line);}
.spec-row div:last-child{font-family:var(--font-mono);}
.spec-row:last-child div{border-bottom:none;}

/* project meta */
.project-meta-row{display:flex;gap:22px;flex-wrap:wrap;margin-top:18px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.project-meta-item{font-size:13px;}
.project-meta-item span{display:block;color:var(--text-muted);font-size:11.5px;margin-bottom:3px;}

/* tag pill */
.tag{display:inline-block;font-family:var(--font-mono);font-size:11px;color:var(--teal);background:rgba(31,111,99,0.08);padding:4px 10px;border-radius:20px;}

/* hub grids (services / projects index) */
.hub-filter{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px;}
.hub-filter a{font-size:13px;text-decoration:none;color:var(--text-muted);border:1px solid var(--line);padding:7px 14px;border-radius:20px;}
.hub-filter a[aria-current]{color:var(--ink-900);border-color:var(--ink-900);font-weight:500;}

/* contacts */
.contact-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:48px;}
.contact-block{margin-top:22px;}
.contact-block h3{font-size:13px;color:var(--text-muted);font-weight:500;margin-bottom:8px;}
.contact-block p,.contact-block a{font-size:15px;line-height:1.6;}
.contact-role{border-top:1px solid var(--line);padding:16px 0;}
.contact-role .role{font-size:12.5px;color:var(--text-muted);}
.contact-role .who{font-size:14.5px;margin-top:2px;}
.map-embed{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.map-embed iframe{width:100%;height:320px;border:0;display:block;}
details.requisites{margin-top:32px;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;}
details.requisites summary{cursor:pointer;font-size:14px;font-weight:500;}
details.requisites .req-body{margin-top:14px;font-size:13.5px;line-height:1.8;color:var(--text-muted);}

/* cta band */
.cta-band{background:var(--surface);border-radius:var(--radius);padding:36px 40px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;}
.cta-band h2{font-size:19px;}
.cta-band p{font-size:13.5px;color:var(--text-muted);margin-top:6px;}

/* footer */
footer{background:var(--ink-950);color:var(--text-inverse-muted);}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;padding:52px 0 32px;}
.footer-brand .brand-name{color:var(--text-inverse);}
.footer-brand p{margin-top:14px;font-size:13.5px;line-height:1.6;max-width:320px;}
footer h4{font-size:13px;color:var(--text-inverse);font-weight:500;margin-bottom:14px;}
footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;font-size:13.5px;}
footer a{text-decoration:none;}
footer a:hover{color:var(--text-inverse);}
.footer-bottom{border-top:1px solid var(--line-dark);padding:18px 0;font-size:12.5px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}

/* responsive */
@media (max-width:900px){
  nav{display:none;}
  .hero-grid{grid-template-columns:1fr;padding:44px 0 36px;}
  .hero h1{font-size:30px;max-width:none;}
  .hero-lede{max-width:none;}
  .stats-row{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(2){border-right:none;}
  .stat{border-bottom:1px solid var(--line-dark);}
  .service-grid{grid-template-columns:1fr;}
  .project-grid,.project-grid.narrow{grid-template-columns:1fr;}
  .content-grid{grid-template-columns:1fr;}
  .sidebar{position:static;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 24px;}
  .wrap{padding:0 20px;}
  .cta-band{flex-direction:column;align-items:flex-start;}
}