html,body{height:100%}
body{
  margin:0;
  font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 400px at 18% 10%, rgba(59,130,246,.30), transparent 60%),
    radial-gradient(700px 380px at 80% 18%, rgba(99,102,241,.28), transparent 58%),
    radial-gradient(650px 380px at 60% 85%, rgba(34,197,94,.18), transparent 55%),
    var(--bg);
}