/* Base (mobile-first) */
*{box-sizing:border-box;}
html{line-height:1.5;-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial}
img{max-width:100%;height:auto}
.container{max-width:960px;margin:2rem auto;padding:1rem}
h1,h2,h3{line-height:1.2;margin:.5rem 0}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace}
.muted{color:var(--muted)}