/* Petra Systems Group – One-page site */
:root{
  --navy:#0E1A2B;
  --steel:#2E4C6D;
  --slate:#5A6673;
  --stone:#F4F6F8;
  --gold:#C7A34B;
  --text:#121826;
  --muted:#4B5563;
  --border:rgba(14,26,43,.12);
  --shadow:0 10px 30px rgba(14,26,43,.10);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  line-height:1.5;
  background:#fff;
}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline}
code{background:rgba(14,26,43,.06); padding:.12rem .32rem; border-radius:8px}

.container{width:min(1120px, 92%); margin:0 auto}
.section{padding:76px 0}
.section-alt{background:linear-gradient(180deg, #fff, var(--stone))}
.section-head{margin-bottom:28px}
.section-head h2{margin:0 0 8px; font-size:32px; letter-spacing:-.02em}
.section-head p{margin:0; color:var(--muted)}

.skip-link{position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;}
.skip-link:focus{left:16px; top:16px; width:auto; height:auto; padding:10px 12px; background:#fff; border:1px solid var(--border); border-radius:10px; z-index:9999}

.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex; align-items:center; justify-content:space-between; padding:14px 0;}
.brand{display:flex; gap:12px; align-items:center}
.mark{
  width:40px; height:40px; border-radius:12px;
  background:linear-gradient(135deg, var(--navy), var(--steel));
  position:relative;
  box-shadow:var(--shadow);
}
.mark:before,.mark:after{content:""; position:absolute; bottom:9px; width:0; height:0; border-style:solid;}
.mark:before{left:10px; border-width:0 9px 16px 9px; border-color:transparent transparent rgba(255,255,255,.95) transparent;}
.mark:after{left:18px; border-width:0 7px 12px 7px; border-color:transparent transparent rgba(255,255,255,.70) transparent;}
.brand-name{font-weight:800; letter-spacing:-.02em}
.brand-tagline{font-size:12px; color:var(--muted); margin-top:2px}

.nav{display:flex; align-items:center; gap:14px; position:relative}
.nav-links{display:flex; align-items:center; gap:18px}
.nav-links a{font-weight:600; color:var(--navy); opacity:.88}
.nav-links a:hover{opacity:1; text-decoration:none}

.nav-toggle{display:none; border:1px solid var(--border); background:#fff; border-radius:12px; padding:10px; cursor:pointer;}
.burger{display:block; width:18px; height:2px; background:var(--navy); position:relative;}
.burger:before,.burger:after{content:""; position:absolute; left:0; width:18px; height:2px; background:var(--navy);}
.burger:before{top:-6px}
.burger:after{top:6px}
.sr-only{position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px; padding:12px 16px;
  border-radius:14px; border:1px solid rgba(255,255,255,.0);
  background:var(--navy); color:#fff; font-weight:700;
  box-shadow:var(--shadow);
  text-decoration:none !important;
}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent; color:var(--navy);
  border:1px solid var(--border);
  box-shadow:none;
}
.btn-small{padding:10px 12px; border-radius:12px; font-weight:700}
.btn-full{width:100%}

.hero{position:relative; padding:76px 0 54px; overflow:hidden;}
.hero-gradient{
  position:absolute; inset:-120px -120px auto -120px;
  height:440px;
  background:
    radial-gradient(600px 240px at 18% 30%, rgba(46,76,109,.22), transparent 65%),
    radial-gradient(520px 240px at 70% 40%, rgba(199,163,75,.18), transparent 66%),
    radial-gradient(620px 260px at 40% 10%, rgba(14,26,43,.16), transparent 68%);
  pointer-events:none;
}
.hero-inner{
  position:relative; z-index:2;
  display:grid; gap:28px;
  grid-template-columns: 1.3fr .9fr;
  align-items:start;
}
.eyebrow{
  display:inline-block;
  background:rgba(14,26,43,.06);
  border:1px solid var(--border);
  color:var(--navy);
  padding:6px 10px;
  border-radius:999px;
  font-weight:700;
  font-size:12px;
  margin:0 0 14px;
}
.hero h1{margin:0 0 12px; font-size:46px; line-height:1.08; letter-spacing:-.03em}
.lead{margin:0 0 18px; color:var(--muted); font-size:16px; max-width:58ch}
.cta-row{display:flex; gap:12px; flex-wrap:wrap; margin:14px 0 18px}
.trust-row{display:flex; gap:10px; flex-wrap:wrap}
.pill{border:1px solid var(--border); background:#fff; padding:8px 10px; border-radius:999px; font-weight:700; font-size:12px; color:var(--navy);}

.card{background:#fff; border:1px solid var(--border); border-radius:var(--radius); padding:18px; box-shadow:var(--shadow);}
.card-header h2{margin:0 0 4px; font-size:18px}
.card-header p{margin:0 0 12px; color:var(--muted); font-size:13px}
.checklist{list-style:none; padding:0; margin:12px 0; display:grid; gap:10px}
.checklist li{display:flex; gap:10px; align-items:flex-start; color:var(--text)}
.checklist li span{color:var(--gold); font-weight:900; margin-top:1px}

.grid{display:grid; gap:16px}
.cards{grid-template-columns:repeat(2, minmax(0,1fr))}
.service-card{border:1px solid var(--border); border-radius:var(--radius); padding:18px; background:#fff;}
.service-card h3{margin:0 0 6px; font-size:18px}
.service-card p{margin:0 0 10px; color:var(--muted)}
.service-card ul{margin:0; padding-left:18px; color:var(--text)}
.service-card li{margin:6px 0}

.pricing{grid-template-columns:repeat(3, minmax(0,1fr))}
.price-card{border:1px solid var(--border); border-radius:var(--radius); padding:18px; background:#fff; position:relative;}
.price-card.featured{border-color:rgba(199,163,75,.55); box-shadow:var(--shadow); background:linear-gradient(180deg, #fff, rgba(199,163,75,.05));}
.badge{position:absolute; top:14px; right:14px; background:rgba(199,163,75,.16); border:1px solid rgba(199,163,75,.40); color:var(--navy); font-weight:800; font-size:12px; padding:6px 10px; border-radius:999px;}
.price-card h3{margin:0 0 6px}
.price{margin:10px 0 6px; font-size:34px; font-weight:900; letter-spacing:-.03em}
.price span{font-size:14px; font-weight:700; color:var(--muted)}
.sub{margin:0 0 10px; color:var(--muted); font-size:13px}
.fine{margin:10px 0 0; color:var(--muted); font-size:12px}

.notice{margin-top:18px; border:1px dashed rgba(14,26,43,.22); background:rgba(14,26,43,.03); border-radius:var(--radius); padding:16px;}
.notice h3{margin:0 0 6px}
.notice p{margin:0; color:var(--muted)}

.two-col{display:grid; grid-template-columns: 1.2fr .8fr; gap:18px; align-items:start;}
.about-box{border:1px solid var(--border); border-radius:var(--radius); padding:18px; background:var(--stone);}
.about-box h3{margin:0 0 10px}
.mini-row{display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:12px}
.mini{background:#fff; border:1px solid var(--border); border-radius:14px; padding:12px}
.mini-k{font-size:12px; color:var(--muted); font-weight:700}
.mini-v{font-weight:800; color:var(--navy); margin-top:2px}

.contact-card{display:grid; grid-template-columns: 1.2fr .8fr; gap:16px; border:1px solid var(--border); border-radius:var(--radius); padding:18px; background:#fff; box-shadow:var(--shadow);}
.contact-actions{display:flex; gap:12px; flex-wrap:wrap; margin:12px 0}
.contact-right{border-left:1px solid var(--border); padding-left:16px; display:grid; gap:10px;}
.kv .k{font-size:12px; color:var(--muted); font-weight:800}
.kv .v{font-weight:800; color:var(--navy)}

.disclaimer{margin-top:16px; color:var(--muted); font-size:12px;}

.footer{border-top:1px solid var(--border); padding:26px 0; background:#fff;}
.footer-inner{display:flex; justify-content:space-between; align-items:center; gap:12px}
.footer-small{font-size:12px; color:var(--muted)}

/* Responsive */
@media (max-width: 920px){
  .hero-inner{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .pricing{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .contact-card{grid-template-columns:1fr}
  .contact-right{border-left:none; padding-left:0; border-top:1px solid var(--border); padding-top:14px}
}
@media (max-width: 760px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    display:none;
    position:absolute;
    right:0;
    top:54px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:16px;
    padding:10px;
    box-shadow:var(--shadow);
    flex-direction:column;
    align-items:stretch;
    min-width:220px;
    gap:10px;
  }
  .nav-links a{padding:10px 12px; border-radius:12px}
  .nav-links a:hover{background:rgba(14,26,43,.04)}
  .nav-links.show{display:flex}
  .hero h1{font-size:38px}
}