/* ===== リセット & ページ全体の下地 ===== */
*{
  box-sizing:border-box;
  margin:0;
  padding:0;
  -webkit-tap-highlight-color:transparent;
}

html,body{
  height:100%;
  overflow:hidden;
  background:#05050f;
}

body{
  font-family:"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  color:#cfe9ff;
  display:flex;
  align-items:center;
  justify-content:center;
  background:
    radial-gradient(1200px 600px at 50% -10%, #14204a 0%, rgba(5,5,15,0) 70%),
    radial-gradient(800px 500px at 50% 110%, #3a0d4a 0%, rgba(5,5,15,0) 70%),
    #05050f;
  touch-action:none;
  user-select:none;
  -webkit-user-select:none;
}