:root{
  --bg:#e6f7ff;
  --surface:#ffffff;
  --muted:#6b7280;
  --accent:#0066cc;
  --accent-strong:#004a9f;
  --radius:10px;
  --max-width:1100px;
  --container-padding:1.25rem;
  --shadow: 0 6px 18px rgba(16,24,40,0.06);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:var(--bg);
  color:#0f172a;
  line-height:1.45;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-size:16px;
}

/* Utilities */
.container{
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 var(--container-padding);
}

/* Skip link */
.skip-link{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip-link:focus{
  left:1rem;
  top:1rem;
  width:auto;
  height:auto;
  padding:.5rem .75rem;
  background:#111827;
  color:white;
  border-radius:6px;
  z-index:1000;
}

/* Header */
.site-header{
  background:linear-gradient(180deg, rgba(255,255,255,0.8), rgba(255,255,255,0.6));
  backdrop-filter: blur(6px);
  border-bottom:1px solid rgba(15,23,42,0.04);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding:0.9rem 0;
}
.brand{
  display:inline-block;
  font-weight:700;
  color:var(--accent-strong);
  text-decoration:none;
  font-size:1.05rem;
}
.site-nav a{
  margin-left:1rem;
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
  padding:.45rem .6rem;
  border-radius:6px;
}
.site-nav a:hover{
  color:var(--accent-strong);
  background:rgba(0,102,204,0.04);
}

/* Hero */
.hero{
  padding:3.25rem 0;
  background:
    linear-gradient(180deg, rgba(0,102,204,0.04), rgba(0,102,204,0.01));
}
.hero .container{display:block; text-align:left}
.hero h1{
  margin:0 0 .5rem 0;
  font-size:2rem;
  line-height:1.08;
  letter-spacing:-0.02em;
}
.lead{
  margin:0 0 1.25rem 0;
  color:var(--muted);
  max-width:60ch;
}
.hero-cta .btn{margin-right:.6rem}

/* Buttons */
.btn{
  display:inline-block;
  text-decoration:none;
  border-radius:8px;
  padding:0.55rem 0.9rem;
  font-weight:700;
  color:var(--accent-strong);
  background:transparent;
  border:1px solid rgba(15,23,42,0.06);
}
.btn.primary{
  color:white;
  background:linear-gradient(180deg,var(--accent),var(--accent-strong));
  border: none;
  box-shadow: 0 6px 18px rgba(0,102,204,0.12);
}
.btn:hover{transform:translateY(-1px); transition:transform .12s ease}

/* Features */
.features{
  padding:2.25rem 0;
}
.section-title{
  margin:0 0 1rem 0;
  font-size:1.25rem;
  color:#0f172a;
}
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1.2rem;
  margin-top:1rem;
}
.feature{
  background:var(--surface);
  padding:1.15rem;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.feature h3{margin:0 0 .5rem 0}
.feature p{margin:0; color:var(--muted)}

/* Docs & code */
.docs{
  padding:2.25rem 0;
}
.code-snippet{
  background:#0b1220;
  color:#e6edf3;
  padding:1rem;
  border-radius:8px;
  overflow:auto;
  margin-top:1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Courier New", monospace;
  font-size:.95rem;
}

/* Contact */
.contact{
  padding:2.25rem 0;
}

/* Footer */
.site-footer{
  border-top:1px solid rgba(15,23,42,0.04);
  background:transparent;
  padding:1.25rem 0;
}
.footer-inner{
  display:flex;
  gap:1rem;
  align-items:center;
  justify-content:space-between;
  color:var(--muted);
}
.footer-nav a{
  margin-left:1rem;
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
}
.footer-nav a:hover{color:var(--accent-strong)}

/* Responsive */
@media (max-width:900px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .header-inner{padding:.75rem 0}
}
@media (max-width:640px){
  .features-grid{grid-template-columns:1fr}
  .site-nav{display:none}
  .hero h1{font-size:1.5rem}
  .footer-inner{flex-direction:column; align-items:flex-start; gap:.5rem}
}