/* ============ Struere Engineering — Option A: Modern Corporate Blue ============ */

:root{
  --navy: #0F172A;
  --navy-soft: #1E293B;
  --blue-1: #0EA5E9;
  --blue-2: #0369A1;
  --blue-grad: linear-gradient(135deg, var(--blue-1), var(--blue-2));
  --bg-light: #F8FAFC;
  --bg-white: #FFFFFF;
  --border: #E2E8F0;
  --text-body: #475569;
  --text-head: #0F172A;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --wrap: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color:var(--text-body);
  background:var(--bg-white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{color:var(--text-head);margin:0 0 .5em;font-weight:700;letter-spacing:-0.01em;}
p{margin:0 0 1em;}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px;}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 28px;border-radius:8px;font-weight:600;font-size:15px;transition:all .2s ease;cursor:pointer;border:2px solid transparent;}
.btn-primary{background:var(--blue-grad);color:#fff;box-shadow:0 8px 20px rgba(3,105,161,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(3,105,161,.45);}
.btn-ghost{border-color:rgba(255,255,255,.5);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);}
.btn-block{width:100%;}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s ease, box-shadow .3s ease;}
.site-header.scrolled{background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 20px rgba(15,23,42,.08);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:84px;}
.brand{display:flex;align-items:center;}
.brand-logo{height:34px;width:auto;}
.logo-on-light{display:none;}
.site-header.scrolled .logo-on-dark{display:none;}
.site-header.scrolled .logo-on-light{display:block;}
.main-nav{display:flex;align-items:center;gap:36px;}
.main-nav a{font-size:15px;font-weight:600;color:#fff;transition:color .2s;}
.site-header.scrolled .main-nav a{color:var(--text-head);}
.main-nav a:hover{color:var(--blue-1);}
.nav-cta{background:var(--blue-grad);color:#fff !important;padding:10px 20px;border-radius:8px;}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;}
.nav-toggle span{width:24px;height:2px;background:#fff;transition:.2s;}
.site-header.scrolled .nav-toggle span{background:var(--text-head);}

/* Hero */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;color:#fff;overflow:hidden;}
.hero-media{position:absolute;inset:0;}
.hero-img{width:100%;height:100%;object-fit:cover;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(115deg, rgba(9,18,36,.92) 20%, rgba(9,18,36,.72) 55%, rgba(9,18,36,.55) 100%);}
.hero-content{position:relative;z-index:2;padding-top:84px;max-width:760px;}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:13px;font-weight:700;color:var(--blue-1);margin-bottom:18px;}
.hero h1{font-size:clamp(2.4rem, 5vw, 3.8rem);color:#fff;line-height:1.08;margin-bottom:22px;}
.hero-sub{font-size:19px;color:#CBD5E1;max-width:600px;margin-bottom:34px;}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}

/* Stats */
.stats{background:var(--navy);padding:52px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
.stat{color:#fff;text-align:left;border-left:2px solid rgba(255,255,255,.15);padding-left:20px;}
.stat-num{display:block;font-size:2.2rem;font-weight:800;background:var(--blue-grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:6px;}
.stat-label{font-size:13.5px;color:#94A3B8;line-height:1.5;}

/* Section generic */
section{padding:100px 0;}
.section-eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:13px;font-weight:700;color:var(--blue-2);margin-bottom:14px;}
.section-title{font-size:clamp(1.8rem,3.4vw,2.6rem);}
.section-lead{font-size:17px;max-width:640px;}
.center{text-align:center;margin-left:auto;margin-right:auto;}

/* About */
.about{background:var(--bg-light);}
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:start;}
.about-copy h2{font-size:clamp(1.7rem,3vw,2.3rem);margin-bottom:24px;}
.about-copy p{font-size:16.5px;}
.about-figures{display:flex;flex-direction:column;gap:20px;}
.figure-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow);}
.figure-num{font-size:13px;font-weight:800;color:var(--blue-1);letter-spacing:.06em;}
.figure-card h3{font-size:18px;margin:8px 0 8px;}
.figure-card p{font-size:14.5px;margin:0;}

/* Services */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:52px;}
.service-card{border:1px solid var(--border);border-radius:var(--radius);padding:32px 28px;transition:.25s;}
.service-card:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:transparent;}
.service-card .icon{width:52px;height:52px;border-radius:12px;background:var(--blue-grad);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:20px;}
.service-card .icon svg{width:26px;height:26px;}
.service-card h3{font-size:19px;margin-bottom:10px;}
.service-card p{font-size:14.5px;margin:0;}

/* Markets */
.markets{background:var(--bg-light);}
.markets-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:44px;}
.market-pill{background:#fff;border:1px solid var(--border);padding:14px 26px;border-radius:999px;font-weight:600;font-size:14.5px;color:var(--text-head);box-shadow:0 4px 14px rgba(15,23,42,.04);}

/* Experience */
.subhead{font-size:20px;margin-top:56px;margin-bottom:4px;}
.subhead.first{margin-top:52px;}
.subhead-note{font-size:14px;color:#94A3B8;margin-bottom:20px;}
.stock-banner{position:relative;height:180px;border-radius:var(--radius);overflow:hidden;background-color:#0F172A;background-image:linear-gradient(135deg,#0F172A,#0369A1);background-size:cover;background-position:center;margin-bottom:20px;display:flex;align-items:flex-end;}
.stock-banner span{position:relative;z-index:1;color:#fff;font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:14px 18px;background:linear-gradient(0deg, rgba(0,0,0,.55), transparent);width:100%;}
.feature-project{border:1px solid var(--border);border-left:4px solid var(--blue-1);border-radius:var(--radius);padding:28px 30px;margin-top:32px;background:var(--bg-light);}
.feature-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue-2);margin-bottom:10px;}
.feature-project h4{font-size:19px;margin-bottom:8px;}
.feature-project p{font-size:14.5px;margin:0;color:var(--text-body);}
.project-table{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.project-row{display:flex;justify-content:space-between;padding:14px 22px;font-size:14.5px;border-bottom:1px solid var(--border);}
.project-row:last-child{border-bottom:none;}
.project-row:nth-child(odd){background:var(--bg-light);}
.project-row span:first-child{font-weight:600;color:var(--text-head);}
.project-row span:last-child{color:var(--text-body);}

.project-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:24px;}
.project-card{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow);}
.project-card img{height:210px;object-fit:cover;width:100%;}
.project-card figcaption{padding:22px;}
.project-card h4{font-size:16.5px;margin-bottom:8px;}
.project-card p{font-size:13.5px;margin:0;color:var(--text-body);}

/* Credentials */
.credentials{background:var(--navy);color:#CBD5E1;}
.credentials h2,.credentials h4{color:#fff;}
.credentials .section-eyebrow{color:var(--blue-1);}
.credentials-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;}
.cred-block{margin-top:28px;}
.cred-block h4{font-size:15px;margin-bottom:10px;color:#fff;}
.state-list{font-size:14.5px;line-height:1.75;color:#94A3B8;}
.cred-side{display:flex;flex-direction:column;gap:18px;}
.cred-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:24px 26px;}
.cred-card h4{font-size:15px;margin-bottom:14px;}
.cred-card ul{margin:0;padding-left:18px;font-size:14px;color:#CBD5E1;}
.cred-card li{margin-bottom:8px;}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;}
.contact-copy h2{font-size:clamp(1.7rem,3vw,2.3rem);}
.contact-detail{margin-top:22px;}
.contact-label{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:#94A3B8;font-weight:700;margin-bottom:4px;}
.contact-detail a{color:var(--blue-2);font-weight:600;font-size:17px;}
.contact-form{background:var(--bg-light);border:1px solid var(--border);border-radius:var(--radius);padding:36px;display:flex;flex-direction:column;gap:14px;}
.contact-form label{font-size:13.5px;font-weight:600;color:var(--text-head);}
.contact-form input,.contact-form textarea{padding:12px 14px;border:1px solid var(--border);border-radius:8px;font-family:inherit;font-size:14.5px;background:#fff;}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--blue-1);border-color:transparent;}
.form-note{font-size:12.5px;color:#94A3B8;text-align:center;margin:6px 0 0;}
.hidden-field{position:absolute;left:-9999px;}

/* Footer */
.site-footer{background:#0B1220;padding:44px 0;}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;}
.footer-mark{height:32px;width:auto;}
.site-footer p{color:#64748B;font-size:13.5px;margin:0;}
.footer-nav{display:flex;gap:24px;}
.footer-nav a{color:#94A3B8;font-size:13.5px;font-weight:600;}
.footer-nav a:hover{color:#fff;}

/* Responsive */
@media (max-width: 980px){
  .about-grid,.credentials-grid,.contact-grid{grid-template-columns:1fr;}
  .service-grid{grid-template-columns:repeat(2,1fr);}
  .project-gallery{grid-template-columns:1fr 1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width: 720px){
  .main-nav{position:fixed;top:84px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:20px 28px 30px;gap:18px;box-shadow:0 12px 24px rgba(15,23,42,.1);transform:translateY(-130%);transition:transform .25s ease;}
  .main-nav.open{transform:translateY(0);}
  .main-nav a{color:var(--text-head) !important;}
  .nav-toggle{display:flex;}
  .service-grid,.project-gallery{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;}
  .stat{border-left:none;border-top:2px solid rgba(255,255,255,.15);padding-left:0;padding-top:14px;}
  section{padding:64px 0;}
  .project-row{flex-direction:column;gap:4px;}
}