body{color:#1f2328;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}header{border-bottom:1px solid #d0d7de;align-items:center;gap:1rem;padding:.75rem 1.5rem;display:flex}header nav{flex:1;gap:1rem;display:flex}header form{margin:0}main{padding:1.5rem}.muted{color:#656d76}.error{color:#cf222e}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.editor-layout{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.5rem;display:grid}