:root{
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --brand:#0ea5e9;
  --container: 1120px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.5;
}
a{ color:var(--brand); text-decoration:none; }
a:hover{ text-decoration:underline; }
img{ max-width:100%; height:auto; display:block; }