/* Simple responsive stylesheet for AI Customer Assistant demo */
:root{
  --blue:#336bff;
  --blue-2:#1f4ed8;
  --bg:#f7f9ff;
  --muted:#6b7280;
  --radius:12px;
  --container:1100px;
  --card-shadow: 0 8px 24px rgba(51,107,255,0.08);
  --card-shadow-2: 0 6px 18px rgba(15,23,42,0.06);
}

*{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;color:#0f172a;background:var(--bg);-webkit-font-smoothing:antialiased}
.container{max-width:var(--container);margin:0 auto;padding:28px;border-radius:8px}
.site-header{background:white;box-shadow:var(--card-shadow-2);position:sticky;top:0;z-index:40}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 28px}
.brand{font-weight:700;color:var(--blue);text-decoration:none;font-size:18px}
.nav a{margin-left:18px;color:#334155;text-decoration:none}
.nav .cta{background:transparent;border:1px solid rgba(51,107,255,0.12);padding:8px 12px;border-radius:10px}

.hero{padding:64px 0;background:linear-gradient(180deg,rgba(51,107,255,0.06),transparent);}
.hero-inner{display:flex;gap:32px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.hero-copy{flex:1;min-width:300px}
.hero-copy h1{font-size:38px;margin:0 0 12px;color:#07204a}
.lead{color:var(--muted);margin-bottom:18px;font-size:18px}
.hero-cta .btn{margin-right:12px}

.btn{display:inline-block;padding:12px 18px;border-radius:12px;text-decoration:none;border:none;cursor:pointer;font-weight:600}
.btn.primary{background:var(--blue);color:white;box-shadow:var(--card-shadow)}
.btn.ghost{background:transparent;border:1px solid rgba(15,23,42,0.06);color:#0f172a}

.small{padding:8px 10px;font-size:14px;border-radius:10px}

.hero-media{width:380px;max-width:48%;min-width:280px}
.device-card{background:linear-gradient(180deg,#ffffff,#f8fbff);padding:12px;border-radius:16px;box-shadow:var(--card-shadow);display:flex;align-items:center;justify-content:center}

/* Sections */
.section{padding:56px 0}
.section.light{background:white;border-radius:12px;margin:12px 0;padding:36px}
.section h2{font-size:26px;margin:0 0 8px;color:#07204a}
.section-sub{color:var(--muted);margin-bottom:18px}

/* Cards grid */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:18px}
.card{background:white;padding:20px;border-radius:12px;box-shadow:var(--card-shadow-2);min-height:140px}
.icon{font-size:28px;margin-bottom:10px}

/* Steps */
.steps{display:flex;gap:18px;flex-wrap:wrap}
.step{background:white;padding:18px;border-radius:12px;flex:1;min-width:220px;box-shadow:var(--card-shadow-2)}
.step-num{background:linear-gradient(90deg,var(--blue),var(--blue-2));width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;font-weight:700;margin-bottom:10px}

/* Demo grid */
.demo-grid{display:grid;grid-template-columns:1fr 480px;gap:24px;align-items:center}
.video-embed{background:#000;border-radius:12px;overflow:hidden;box-shadow:var(--card-shadow);}
.video-embed iframe{width:100%;height:280px;border:0}

/* Pricing cards */
.pricing-cards{display:flex;gap:18px;flex-wrap:wrap}
.price-card{background:white;padding:22px;border-radius:12px;flex:1;min-width:220px;box-shadow:var(--card-shadow-2);text-align:center}
.price-card.popular{border:2px solid rgba(51,107,255,0.12)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 420px;gap:24px;align-items:start}
.contact-form{background:white;padding:18px;border-radius:12px;box-shadow:var(--card-shadow-2)}
.contact-form label{display:block;margin-bottom:10px;font-size:14px;color:#0f172a}
.contact-form input, .contact-form textarea{width:100%;padding:10px;border-radius:8px;border:1px solid #e6eefc;margin-top:6px}
.form-actions{display:flex;gap:10px;align-items:center;margin-top:8px}

/* Footer */
.site-footer{margin-top:28px;padding:28px 18px;background:white;border-radius:12px;box-shadow:var(--card-shadow-2)}
.footer-grid{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
.footer-links a{display:block;color:#334155;text-decoration:none;margin-bottom:6px}

/* Responsive */
@media (max-width:900px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .demo-grid{grid-template-columns:1fr; }
  .contact-grid{grid-template-columns:1fr}
  .hero-inner{flex-direction:column-reverse;align-items:flex-start}
  .hero-media{max-width:100%;width:100%}
}
@media (max-width:520px){
  .cards{grid-template-columns:1fr}
  .header-inner{padding:10px}
  .hero-copy h1{font-size:26px}
  .container{padding:16px}
}