html,
  body {
margin: 0;
padding: 0;
  }

body {
width: 100vw;
height: 100vh;
overflow: hidden;
background: radial-gradient(#efefef, #cccccc);
}

* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}