/* Blue Dark theme — estilo simples e leve */
:root{
  --bg:#0b1220;
  --card:#0f1a2b;
  --accent:#2b7cff;
  --muted:#9fb3d9;
  --text:#e6eef8;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,system-ui,Segoe UI,Roboto,Arial;
  background:linear-gradient(180deg,var(--bg),#071021);
  color:var(--text);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
.site-header{
  padding:18px 20px;
  background:linear-gradient(90deg, rgba(11,18,32,0.6), rgba(15,26,43,0.85));
  border-bottom:1px solid rgba(255,255,255,0.03);
}
.site-header h1{margin:0;font-size:22px}
.site-header .tagline{margin:4px 0 8px;font-size:13px;color:var(--muted)}
nav a{
  color:var(--muted);
  text-decoration:none;
  margin-right:14px;
  font-size:14px;
}
.container{
  max-width:980px;
  margin:28px auto;
  padding:18px;
  background:linear-gradient(180deg, rgba(15,26,43,0.3), rgba(8,14,24,0.2));
  border-radius:8px;
  box-shadow: 0 6px 18px rgba(2,6,12,0.6);
}
h2{color:var(--accent)}
code{
  background:rgba(255,255,255,0.03);
  padding:2px 6px;
  border-radius:4px;
  font-family:monospace;
  color:var(--text);
  font-size:0.95em;
}
ul{margin:8px 0 16px 18px}
.footer-note{margin-top:18px;padding-top:8px;border-top:1px dashed rgba(255,255,255,0.03)}
footer{color:var(--muted);text-align:center;padding:18px 8px}
a{color:var(--accent)}