*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial;
  background:var(--bg); color:var(--fg)
}
h1,h2,h3{margin:0 0 12px}
.muted{color:var(--muted)}
.msg{margin-top:10px}
.hidden { display: none !important; }
[hidden] { display: none !important; }