/* Tungsten Intelligence — Light Theme */
/* Base */
*,*::before,*::after{box-sizing:border-box}
html:focus-within{scroll-behavior:smooth}
:root{
  --primary:#1A237E;         /* deep indigo header */
  --accent:#00BFA6;          /* tungsten green */
  --ink:#263238;             /* dark slate text */
  --muted:#5f7481;           /* muted copy */
  --bg:#F5F7FA;              /* light page background */
  --card:#ffffff;            /* cards */
  --ring:0 0 0 3px rgba(0,191,166,.35);
  --radius:12px;
  --shadow-sm:0 2px 10px rgba(0,0,0,.06);
  --shadow-md:0 8px 24px rgba(0,0,0,.10);
  --shadow-lg:0 18px 44px rgba(0,0,0,.16);
  --container:1200px;
}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:var(--container);margin:auto;padding-inline:24px}

/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}
.header-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.logo{display:flex;align-items:center;gap:12px;color:#fff;font-weight:800}
.logo-mark{inline-size:28px;block-size:28px;border-radius:6px;background:linear-gradient(135deg,var(--accent),#13c7b6);display:grid;place-items:center;color:#003d36;font-weight:900}
.logo-text{font-weight:800}
.logo-sub{opacity:.9}
.site-nav ul{display:flex;gap:28px;list-style:none;margin:0;padding:0}
.site-nav a{color:#e7ebff;font-weight:600;opacity:.95}
.site-nav a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.site-nav a.active,[aria-current="page"]{color:#fff;text-decoration:underline;text-underline-offset:6px}
.nav-toggle{display:none}
.header-cta .btn{white-space:nowrap}
@media (max-width:1024px){
  .nav-toggle{display:grid;place-items:center;width:44px;height:44px;border-radius:10px;border:1px solid rgba(255,255,255,.25);background:transparent;color:#fff}
  .site-nav ul{display:none;position:fixed;inset-block-start:68px;inset-inline:0;background:var(--primary);padding:20px 24px;flex-direction:column;gap:16px;border-top:1px solid rgba(255,255,255,.1)}
  .site-nav[data-open="true"] ul{display:flex}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 18px;border-radius:10px;font-weight:800;background:var(--accent);color:#003d36;box-shadow:var(--shadow-sm);transition:.18s;border:0}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost{background:transparent;color:var(--primary);border:1px solid #c9d4de}
.btn-ghost:hover{background:#fff}
.btn.sm{padding:8px 12px;border-radius:8px}
.w-100{width:100%}

/* Hero (light with imagery) */
.hero{color:#0b163d;background:
  radial-gradient(1100px 600px at 85% -10%, rgba(0,191,166,.15), transparent 60%),
  linear-gradient(180deg,#e6e9ff 0%, #eef2ff 60%, #f6f8ff 100%)}
.hero-wrap{padding:clamp(56px,7vw,96px) 0}
.hero-copy h1{font-size:clamp(32px,4vw,54px);line-height:1.08;margin:0 0 10px;color:#11164a}
.hero-copy p{font-size:clamp(16px,1.6vw,20px);color:#37474F;max-width:780px;margin:0 0 22px}
.hero-visual{border-radius:var(--radius);min-height:260px;box-shadow:var(--shadow-lg);background-size:cover;background-position:center}

/* Sections */
.section{padding:clamp(56px,7vw,96px) 0}
.section-head{text-align:center;margin-bottom:28px}
.eyebrow{color:var(--accent);font-weight:800;letter-spacing:.18em;text-transform:uppercase;font-size:12px}
h2{font-size:clamp(26px,3.2vw,36px);color:var(--primary);margin:8px 0 10px}
.lead{color:#37474F;max-width:760px;margin:0 auto}

/* Layout helpers */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}}

/* Cards */
.card{background:var(--card);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:.18s;border:1px solid #e6ecf2}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,#e9fbf8,#d4fff8);display:grid;place-items:center;color:#067e6e;font-weight:900;margin-bottom:12px}

/* Services grid */
.svc-grid{display:grid;gap:22px;grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:900px){.svc-grid{grid-template-columns:1fr}}
.svc h3{margin:6px 0}
.svc ul{margin:8px 0 0;padding-left:18px;color:#37474F}

/* Contact strip (light) */
.contact{background:linear-gradient(135deg,#e6e9ff,#f3f7ff);color:#20336a}
.panel{background:#ffffff;border:1px solid #e6ecf2;border-radius:16px;padding:24px;box-shadow:var(--shadow-lg)}
label{font-weight:600;font-size:14px;color:#304657}
input,textarea,select{width:100%;padding:12px 14px;border-radius:10px;border:1px solid #cfe0ea;background:#fff;color:#15232c}
input:focus,textarea:focus,select:focus{outline:none;box-shadow:var(--ring)}

/* Footer (light charcoal) */
.site-footer{background:#263238;color:#cfd8dc;padding:28px 0}
.site-footer a{color:#a3ffef}
.footer-grid{display:grid;gap:18px;grid-template-columns:1.4fr .8fr .8fr}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr}}

/* Captcha row (for contact page) */
.captcha-row{display:grid;grid-template-columns:auto 100px 1fr;gap:10px;align-items:center}
.captcha-img{height:44px;border-radius:8px;border:1px solid #cfe0ea;background:#fff}

/* Map */
.map-embed iframe{width:100%;height:260px;border-radius:12px;border:0}

/* A11y */
.skip-link{position:absolute;left:-999px}
.skip-link:focus{left:12px;top:12px;background:#fff;color:#000;padding:10px;border-radius:8px}