:root{
  --mavi:#185FA5;
  --mavi-dark:#042C53;
  --mavi-ink:#0e2338;
  --ink:#1a1f2b;
  --muted:#5b6472;
  --line:#e5e9ef;
  --bg:#ffffff;
  --bg-alt:#f5f8fc;
  --radius:10px;
  --shadow:0 1px 2px rgba(4,44,83,.06), 0 8px 24px rgba(4,44,83,.06);
  --max:1120px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:var(--mavi);text-decoration:none}
a:hover,a:focus{text-decoration:underline}
:focus-visible{outline:2px solid var(--mavi);outline-offset:2px;border-radius:4px}

.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header / nav */
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--mavi-dark);font-weight:700;font-size:19px;letter-spacing:.2px;margin-right:auto}
.brand:hover{text-decoration:none}
.brand-mark{
  width:22px;height:22px;border-radius:6px;
  background:linear-gradient(135deg,var(--mavi) 0%,var(--mavi-dark) 100%);
  box-shadow:inset 0 0 0 2px #fff, 0 0 0 1px var(--mavi-dark);
}
.site-nav{margin-left:auto}
.menu{list-style:none;margin:0;padding:0;display:flex;gap:22px}
.menu a{color:var(--ink);font-weight:500}
.tel{color:var(--mavi-dark);font-weight:600;white-space:nowrap}
.tel:hover{text-decoration:none;color:var(--mavi)}

/* Hamburger button — hidden on desktop */
.nav-toggle{
  display:none;
  width:40px;height:40px;padding:0;
  background:transparent;border:1px solid var(--line);border-radius:8px;
  cursor:pointer;
  align-items:center;justify-content:center;
  color:var(--mavi-dark);
}
.nav-toggle:hover{border-color:var(--mavi);color:var(--mavi)}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";display:block;width:20px;height:2px;background:currentColor;
  border-radius:2px;transition:transform .18s ease, opacity .18s ease, top .18s ease;
}
.nav-toggle-bars{position:relative}
.nav-toggle-bars::before{position:absolute;left:0;top:-6px}
.nav-toggle-bars::after{position:absolute;left:0;top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg)}

/* Hero */
.hero{
  padding:72px 0 56px;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(24,95,165,.10), transparent 60%),
    linear-gradient(180deg,#fbfdff 0%, #ffffff 100%);
  border-bottom:1px solid var(--line);
}
.hero h1{
  font-size:clamp(28px,4.4vw,44px);
  line-height:1.15;
  margin:0 0 16px;
  color:var(--mavi-dark);
  letter-spacing:-.5px;
}
.hero .lead{
  font-size:clamp(16px,2.1vw,19px);
  color:var(--muted);
  max-width:720px;
  margin:0 0 28px;
}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 36px}
.btn{
  display:inline-block;
  padding:12px 20px;
  border-radius:var(--radius);
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .05s ease, background .15s ease, border-color .15s ease;
  font-size:15px;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--mavi);color:#fff}
.btn-primary:hover{background:var(--mavi-dark);color:#fff}
.btn-ghost{background:#fff;color:var(--mavi-dark);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--mavi);color:var(--mavi)}

.hero-icons{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:repeat(2,1fr);gap:12px 20px;
  max-width:640px;color:var(--mavi-dark);font-weight:500;
}
.hero-icons .ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:8px;
  background:rgba(24,95,165,.08);color:var(--mavi);
  margin-right:10px;font-size:16px;
}
.hero-icons li{display:flex;align-items:center}

/* Sections */
.section{padding:72px 0;border-bottom:1px solid var(--line)}
.section-alt{background:var(--bg-alt)}
.section h2{
  font-size:clamp(24px,3vw,32px);
  margin:0 0 12px;color:var(--mavi-dark);letter-spacing:-.3px;
}
.section-lead{color:var(--muted);max-width:720px;margin:0 0 32px}

/* Grids */
.grid{display:grid;gap:20px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 22px 20px;
  box-shadow:var(--shadow);
}
.card h3{
  margin:0 0 10px;
  color:var(--mavi-dark);
  font-size:17px;
}
.card p{margin:0;color:var(--ink)}

/* Contact */
.contact-grid{
  display:grid;grid-template-columns:1fr 1.5fr;gap:32px;align-items:start;
}
.contact-info{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
}
.contact-info p{margin:0 0 14px}
.contact-info p:last-child{margin-bottom:0}
.contact-form{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
  display:grid;gap:14px;
}
.field label{display:block;font-weight:600;margin-bottom:6px;color:var(--mavi-dark);font-size:14px}
.field input,.field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:8px;
  padding:10px 12px;
  font:inherit;
  color:var(--ink);
  background:#fff;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.field input:focus,.field textarea:focus{
  border-color:var(--mavi);
  outline:0;
  box-shadow:0 0 0 3px rgba(24,95,165,.15);
}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form-status{margin:6px 0 0;font-size:14px;min-height:1.4em}
.form-status.ok{color:#0a7c3d}
.form-status.err{color:#b1381a}

/* Footer */
.site-footer{
  background:var(--mavi-dark);color:#cfdbe7;padding:48px 0 24px;
}
.site-footer a{color:#ffffff}
.foot-cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px;margin-bottom:24px}
.foot-brand{font-weight:700;color:#fff;margin:0 0 6px}
.copy{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;margin:0;font-size:13px;color:#9db0c5}
[data-todo]{color:#9db0c5;font-style:italic}

/* Responsive */
@media (max-width: 900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr 1fr}

  /* Hamburger visible from tablet down */
  .nav-toggle{display:inline-flex}
  .site-nav{
    order:99;
    flex-basis:100%;
    margin:0;
    max-height:0;
    overflow:hidden;
    transition:max-height .25s ease;
  }
  .site-nav[data-open="true"]{max-height:320px}
  .menu{
    flex-direction:column;
    gap:0;
    padding:8px 0 12px;
    border-top:1px solid var(--line);
    margin-top:6px;
  }
  .menu li{width:100%}
  .menu a{
    display:block;padding:12px 4px;
    border-bottom:1px solid var(--line);
  }
  .menu li:last-child a{border-bottom:0}
}
@media (max-width: 640px){
  .container{padding:0 16px}
  .nav{gap:10px;min-height:60px}
  .brand{font-size:17px}
  .tel{font-size:14px}
  .hero{padding:44px 0 36px}
  .section{padding:48px 0}
  .grid-4,.grid-3{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:1fr;gap:24px}
  .hero-icons{grid-template-columns:1fr;gap:10px}
  .cta-row .btn{flex:1 1 auto;text-align:center}
  .card{padding:18px}
  .section h2{font-size:22px}
  .contact-info,.contact-form{padding:18px}
}
@media (max-width: 380px){
  .tel-text{display:none}
  .brand-name{font-size:16px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .btn{transition:none}
}