/* Professional, responsive CSS for HVAC service site */
/* Neutral modern palette, readable typography, clear CTAs */

:root{
  --bg: #f7fafc;
  --card: #ffffff;
  --accent: #0b5ed7;
  --accent-2: #0d6efd;
  --muted: #6b7280;
  --radius: 12px;
  --maxw: 1100px;
  --shadow: 0 6px 18px rgba(11,78,223,0.08);
  --text: #0b1220;
  --accent-strong: #073b8a;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:28px auto;padding:20px}
.header{display:flex;align-items:center;justify-content:space-between;gap:18px;background:linear-gradient(90deg,#ffffffaa,#ffffffaa);padding:14px;border-radius:14px}
.brand{display:flex;align-items:center;gap:14px}
.logo{width:56px;height:56px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;box-shadow:var(--shadow)}
.brand h1{margin:0;font-size:18px;line-height:1}
.brand p{margin:0;font-size:12px;color:var(--muted)}

.nav{display:flex;gap:12px;align-items:center}
.nav a{padding:10px 12px;border-radius:10px;color:var(--accent-strong);font-weight:600}
.cta{display:flex;gap:10px;align-items:center}

.btn{background:var(--accent);color:#fff;padding:10px 14px;border-radius:10px;font-weight:700;display:inline-block;box-shadow:0 6px 16px rgba(11,78,223,0.12)}
.btn.ghost{background:transparent;border:2px solid var(--accent);color:var(--accent-strong)}

.hero{display:grid;grid-template-columns:1fr 360px;gap:22px;align-items:center;margin-top:20px}
.hero-card{background:var(--card);padding:24px;border-radius:14px;box-shadow:var(--shadow)}
.hero h2{margin:0 0 8px 0;font-size:22px}
.lead{color:var(--muted);margin-bottom:14px}

.services{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}
.card{background:var(--card);padding:18px;border-radius:12px;box-shadow:var(--shadow);border:1px solid #eef2ff}
.card h3{margin-top:0}
.card p{color:var(--muted)}

.about{display:flex;gap:18px;margin-top:22px}
.about .box{flex:1;background:var(--card);padding:18px;border-radius:12px;box-shadow:var(--shadow)}

.testimonials{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:22px}
.testimonials blockquote{background:#fff;padding:14px;border-radius:10px;border-left:4px solid var(--accent);margin:0;color:var(--muted)}

.contact{margin-top:22px;background:linear-gradient(180deg,#fff,#fbfdff);padding:18px;border-radius:12px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.input,textarea{width:100%;padding:12px;border-radius:10px;border:1px solid #e6eef8;background:#fff}
textarea{resize:vertical}

.footer{margin-top:28px;padding:16px;border-radius:12px;background:transparent;color:var(--muted);display:flex;justify-content:space-between;align-items:center;gap:12px}

@media (max-width:980px){
  .hero{grid-template-columns:1fr; padding-bottom:6px}
  .services{grid-template-columns:repeat(2,1fr)}
  .testimonials{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
}

@media (max-width:600px){
  .services{grid-template-columns:1fr}
  .header{flex-direction:column;align-items:flex-start;gap:12px}
  .nav{flex-wrap:wrap}
}