:root{
  --bg: #0f1220;
  --card: #171a2b;
  --text: #f3f4f6;
  --muted: #c7c9d3;
  --accent: #7dd3fc;
  --border: rgba(255,255,255,0.10);
}

*{ box-sizing: border-box; }

body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(125,211,252,0.25), transparent),
              radial-gradient(900px 500px at 90% 10%, rgba(167,139,250,0.18), transparent),
              var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.container{
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header{
  padding: 64px 0 32px;
  border-bottom: 1px solid var(--border);
}

.badge{
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  margin: 0 0 10px;
}

h1{
  font-size: clamp(28px, 4vw, 44px);
  margin: 6px 0 10px;
}

.subtitle{
  color: var(--muted);
  max-width: 60ch;
  margin: 0 0 18px;
}

.button{
  display: inline-block;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(125,211,252,0.16);
  border: 1px solid rgba(125,211,252,0.35);
  color: var(--text);
  text-decoration: none;
}

.button:hover{
  transform: translateY(-1px);
}

main{
  padding: 28px 0 48px;
}

.card{
  background: rgba(23,26,43,0.75);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  backdrop-filter: blur(8px);
}

.card h2, .card h3{
  margin-top: 0;
}

.grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 14px;
}

code{
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 8px;
}

.site-footer{
  padding: 22px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 820px){
  .grid{ grid-template-columns: 1fr; }
  .site-header{ padding: 44px 0 22px; }
}

.nav{
  display: flex;
  gap: 12px;
  margin-top: 12px 0 0;
}

.nav a{
  color: var(--muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 10px;
}

.nav a:hover{
  background: rgba(255,255,255,0.08);
  color: var(--text);
}
.nav a.active{
  background: rgba(255,255,255,0.12);
  color: var(--text);
}