/* Altay Doğalgaz - styles.css */
:root{
  --bg:#0b1220;
  --surface:#0f172a;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --brand:#0ea5e9;
  --brand-2:#22d3ee;
  --card:#111827;
  --ring: 0 0 0 3px rgba(14,165,233,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;background:linear-gradient(180deg,#070b15, #0b1220);color:var(--text);line-height:1.6}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1100px,92%);margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:1rem;top:1rem;width:auto;height:auto;background:var(--brand);color:#001;padding:.5rem 1rem;border-radius:.5rem;z-index:9999}
/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(15,23,42,.7);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0}
.brand{display:flex;gap:.6rem;align-items:center;font-weight:700;letter-spacing:.2px}
.brand svg{fill:url(#grad);filter:drop-shadow(0 0 12px rgba(34,211,238,.35))}
.menu{display:flex;align-items:center;gap:1rem}
.menu a{opacity:.9}
.menu .btn{margin-left:.25rem}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:transparent;border:0}
.menu-toggle span{width:26px;height:2px;background:var(--text);display:block;border-radius:2px}
.mobile-menu{display:flex;flex-direction:column;gap:.75rem;padding:1rem;border-bottom:1px solid rgba(255,255,255,.06);background:#0f172a}
/* Buttons */
.btn{background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#03131d;padding:.65rem 1rem;border-radius:1rem;font-weight:700;box-shadow:0 8px 24px rgba(14,165,233,.25);display:inline-block}
.btn--ghost{background:transparent;border:1px solid rgba(255,255,255,.2);color:var(--text)}
/* Hero */
.hero{padding:5rem 0 3rem;border-bottom:1px solid rgba(255,255,255,.06)}
.hero__grid{display:grid;grid-template-columns:1.2fr 1fr;gap:2rem;align-items:center}
.hero h1{font-size:clamp(28px,4.5vw,48px);line-height:1.1;margin:0 0 .75rem}
.grad{background:linear-gradient(90deg,#22d3ee,#0ea5e9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__cta{display:flex;gap:.75rem;margin:1rem 0 1.25rem;flex-wrap:wrap}
.badges{display:flex;gap:.5rem;list-style:none;padding:0;margin:0;flex-wrap:wrap}
.badges li{background:#0b1626;border:1px solid rgba(255,255,255,.06);padding:.4rem .6rem;border-radius:999px;color:#b9dfff}
.hero__visual{position:relative;min-height:280px}
.hero__mockup{position:absolute;right:0;top:0;bottom:0;left:0;display:grid;place-items:center}
.pipe{width:220px;height:16px;border-radius:16px;background:linear-gradient(90deg,#0ea5e9,#22d3ee);box-shadow:0 12px 40px rgba(34,211,238,.25)}
.boiler{width:160px;height:220px;border-radius:18px;background:linear-gradient(180deg,#0b1626,#0f1f35);border:1px solid rgba(255,255,255,.08);position:relative}
.boiler:before{content:'';position:absolute;left:16px;right:16px;top:24px;height:10px;border-radius:8px;background:#0c1d30}
/* Stats card */
.stat{position:absolute;top:10%;left:-10px;background:#0b1626;border:1px solid rgba(255,255,255,.08);padding:.75rem 1rem;border-radius:1rem;box-shadow:0 8px 30px rgba(0,0,0,.25)}
.stat + .stat{top:auto;bottom:8%;left:auto;right:-10px}
/* Sections */
.section{padding:4rem 0}
.section.alt{background:#0e1728;border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.lead{color:var(--muted);margin-top:.25rem}
.grid{display:grid;gap:1rem}
.cards{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:1rem;padding:1rem;box-shadow:0 10px 24px rgba(0,0,0,.25)}
.service .icon{font-size:28px}
.features{grid-template-columns:repeat(4,1fr)}
.gallery{grid-template-columns:repeat(3,1fr)}
/* Contact */
.contact{display:grid;grid-template-columns:1.1fr .9fr;gap:1rem;align-items:start}
.contact__list{list-style:none;padding:0;margin:0 0 1rem 0}
.contact__list li{margin:.2rem 0}
.contact .map{width:100%;height:420px;border:0;border-radius:1rem}
.contact__form{display:grid;gap:.6rem}
.contact__form label{display:grid;gap:.25rem;font-size:.95rem}
.contact__form input,.contact__form select,.contact__form textarea{background:#0b1626;border:1px solid rgba(255,255,255,.08);color:var(--text);padding:.6rem .7rem;border-radius:.7rem;outline:none}
.contact__form input:focus,.contact__form textarea:focus,.contact__form select:focus{box-shadow:var(--ring)}
.footer{border-top:1px solid rgba(255,255,255,.06);padding:1.25rem 0;background:#0f172a}
.footer__grid{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.footer__nav{display:flex;gap:1rem}
/* Floats */
.float{position:fixed;right:14px;z-index:60;width:52px;height:52px;border-radius:999px;display:grid;place-items:center;font-size:24px;box-shadow:0 12px 30px rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.1)}
.float--call{bottom:86px;background:#1f2937}
.float--wp{bottom:22px;background:#0ea5e9}
/* Responsive */
@media (max-width:960px){
  .hero__grid{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .features{grid-template-columns:repeat(2,1fr)}
  .contact{grid-template-columns:1fr}
}
@media (max-width:640px){
  .menu{display:none}
  .menu-toggle{display:flex}
  .cards,.features,.gallery{grid-template-columns:1fr}
  .hero{padding:4rem 0 2rem}
}