:root{
  --blue:#1976D2;
  --dark-blue:#155fa8;
  --silver:#e6e9ee;
  --muted:#6b6b6b;
  --bg:#ffffff;
  --accent:#0b74d1;
}
*{box-sizing:border-box}
body{font-family: 'Vazirmatn', Tahoma, sans-serif;background:var(--bg);color:#222;margin:0;line-height:1.6}
.container{width:92%;max-width:1200px;margin:0 auto}
a{color:var(--accent);text-decoration:none}
.site-header{background:linear-gradient(180deg, #fff, #f8f9fb);border-bottom:1px solid var(--silver);position:sticky;top:0;z-index:100}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.logo{height:56px}
.main-nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0}
.main-nav a{color:#263238;font-weight:600;padding:8px 6px;border-radius:6px}
.main-nav a:hover{background:var(--silver)}
.mobile-toggle{display:none;border:0;background:none;padding:8px;border-radius:6px}
.hero{padding:60px 0;background:linear-gradient(90deg, rgba(25,118,210,0.06), rgba(0,0,0,0.02))}
.hero-inner{display:flex;align-items:center;gap:30px}
.hero-text h1{font-size:2rem;margin-bottom:8px;color:var(--dark-blue)}
.hero-text p{color:var(--muted);margin-bottom:16px}
.btn{display:inline-block;padding:10px 16px;border-radius:8px;border:0;cursor:pointer;font-weight:700}
.btn.primary{background:var(--blue);color:#fff}
.btn.outline{background:transparent;border:2px solid var(--silver);color:var(--dark-blue);margin-left:8px}
.section{padding:48px 0}
.section h2{text-align:center;color:var(--dark-blue);margin-bottom:18px}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}
.about-img img{width:100%;border-radius:8px;display:block}
.about-features .feature{background:#fff;padding:14px;border-radius:8px;margin-bottom:10px;box-shadow:0 6px 18px rgba(16,24,40,0.06)}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.service-card{background:#fff;padding:18px;border-radius:10px;box-shadow:0 8px 20px rgba(16,24,40,0.06);text-align:center}
.service-card .icon{font-size:28px;margin-bottom:10px}
.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.project-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 8px 20px rgba(16,24,40,0.06)}
.project-card img{width:100%;height:160px;object-fit:cover;display:block}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.contact-info p{margin:8px 0;color:var(--muted)}
.contact-form input,.contact-form textarea{width:100%;padding:12px;border-radius:8px;border:1px solid #e6e9ee;margin-bottom:12px}
.site-footer{background:var(--silver);padding:24px 0;margin-top:24px;border-top:1px solid #dfe6ec}
.footer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;align-items:center;text-align:center}
.footer-grid img.logo-sm{height:48px;margin-bottom:8px}
.footer-nav ul{list-style:none;display:flex;gap:12px;justify-content:center;padding:0;margin:0}
.footer-copy{grid-column:1/-1;color:#4a4a4a;margin-top:8px}

/* Responsive */
@media(max-width:900px){
  .about-grid{grid-template-columns:1fr}
  .hero-inner{flex-direction:column;text-align:center}
  .main-nav{display:none}
  .mobile-toggle{display:block}
  .footer-grid{grid-template-columns:1fr;gap:18px}
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}