:root{
  --bg:#0f1724;
  --card:#0b1220;
  --muted:#9aa6b2;
  --accent:#5eead4; /* mint */
  --accent-2:#60a5fa; /* blue */
  --glass: rgba(255,255,255,0.04);
  --radius:14px;
  --maxw:1100px;
  --shadow: 0 8px 30px rgba(2,6,23,0.6);
  --glass-border: rgba(255,255,255,0.06);
  --glass-2: rgba(255,255,255,0.02);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg,#071427 0%, #02121a 100%);
  color:#e6eef6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
  padding-bottom:80px;
}

/* layout */
.container{
  max-width:var(--maxw);
  margin:36px auto;
  padding:24px;
}

/* header / nav */
.site-header{
  background: linear-gradient(90deg, rgba(96,165,250,0.06), rgba(94,234,212,0.03));
  border-radius:18px;
  padding:18px 22px;
  display:flex;
  align-items:center;
  gap:18px;
  box-shadow:var(--shadow);
  border:1px solid var(--glass-border);
}
.brand{
  display:flex;
  gap:12px;
  align-items:center;
  text-decoration:none;
  color:inherit;
}
.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;
  font-weight:700;
  color:#042235;
  box-shadow: 0 6px 20px rgba(96,165,250,0.12);
  flex-shrink:0;
}
.brand h1{font-size:18px;margin:0}
.brand p{margin:0;font-size:12px;color:var(--muted)}

/* nav */
.main-nav{
  margin-left:auto;
  display:flex;
  gap:10px;
  align-items:center;
  flex-wrap:wrap;
}
.main-nav a{
  color:var(--muted);
  text-decoration:none;
  padding:8px 12px;
  border-radius:10px;
  font-weight:600;
  transition: all .18s ease;
  font-size:14px;
}
.main-nav a:hover{ color:#fff; background:var(--glass-2); transform:translateY(-2px)}
.main-nav a.active{
  color:#042235;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  box-shadow: 0 6px 18px rgba(96,165,250,0.12);
}

/* hero */
.hero{
  display:grid;
  grid-template-columns: 1fr 420px;
  gap:22px;
  margin-top:20px;
}
.hero .panel{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:var(--radius);
  padding:26px;
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow);
}
.hero h2{margin:0 0 8px 0;font-size:22px}
.lead{color:var(--muted);margin-bottom:16px}

/* sitemap visual */
.sitemap{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.015));
  padding:14px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,0.03);
}
.card h3{margin:0;font-size:16px}
.card p{margin:6px 0 0 0;color:var(--muted);font-size:13px}

/* grid of sections */
.grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap:18px;
  margin-top:18px;
}
.section{
  padding:18px;
  border-radius:12px;
  background:var(--card);
  border:1px solid var(--glass-border);
  box-shadow: 0 6px 24px rgba(2,6,23,0.6);
}
.section h4{margin-top:0}
.section p{color:var(--muted);font-size:14px}

/* footer */
.footer{
  margin-top:40px;
  padding:18px;
  border-radius:12px;
  text-align:center;
  color:var(--muted);
  font-size:14px;
  border:1px solid var(--glass-border);
  background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.01));
}

/* utilities */
.kv{display:flex;gap:10px;align-items:center}
.badge{background:rgba(255,255,255,0.03);padding:6px 8px;border-radius:8px;font-weight:600;color:var(--muted);font-size:13px}

/* article container */
.article{
  margin-top:18px;
  padding:18px;
  border-radius:12px;
  background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.01));
  border:1px solid var(--glass-border);
}
.article h1{margin-top:0}

/* responsive */
@media (max-width:960px){
  .hero{grid-template-columns:1fr;}
  .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .main-nav{display:none}
  .site-header{padding:14px}
  .grid{grid-template-columns:1fr}
}