body{font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{width:min(var(--container),calc(100% - 32px));margin-inline:auto}.section{padding:64px 0}.section.muted{background:var(--soft)}.narrow{max-width:840px}.alert{padding:12px 14px;border-radius:12px;margin:12px 0}.alert.success{background:#ecfdf5}.alert.error{background:#fef2f2}