:root{--color-bg:#f4f5f7;--color-text:#1f2430;--color-text-muted:#6b7280;--color-primary:#2f6fed;font-family:Segoe UI,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}html,body,#app{height:100%}body{background:var(--color-bg);color:var(--color-text);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;margin:0;font-size:14px;line-height:1.6}h1,h2,h3{margin:0 0 .5rem}a{color:var(--color-primary)}.muted{color:var(--color-text-muted);font-size:.85rem}