:root{
  --bg:#ffffff;
  --fg:#222222;
  --accent:#005fcc;
  --muted:#666666;
  --line:#e5e5e5;
}
[data-theme="dark"]{
  --bg:#1e1e1e;
  --fg:#f0f0f0;
  --accent:#4dabf7;
  --muted:#aaaaaa;
  --line:#333333;
}
*{
  box-sizing:border-box;
  margin:0;
  font-family:system-ui,Arial;
}
body{
  background:var(--bg);
  color:var(--fg);
  line-height:1.6;
  display:flex;
  flex-direction:column;
  min-height:100vh;
}
header,footer{
  padding:1.2rem 5vw;
  border-bottom:1px solid var(--line);
}
header{
  display:flex;
  justify-content:space-between;
  align-items:center;
}
header h1 a{
  text-decoration:none;
  color:var(--fg);
}
#theme-toggle{
  background:none;
  border:none;
  font-size:1.4rem;
  cursor:pointer;
}
main{
  flex:1;
  padding:2rem 5vw;
}
article{
  margin-bottom:2rem;
}
article h2 a{
  color:var(--accent);
  text-decoration:none;
}
article .meta{
  color:var(--muted);
  font-size:.85rem;
}
@media(max-width:600px){
  header,main{
    padding-left:4vw;
    padding-right:4vw;
  }
}