* {
  box-sizing: border-box;
}
html{
-webkit-user-select: none;
-webkit-touch-callout: none;
overflow:  hidden;
}
body{
  position:fixed;width:100vw;height:100vh;margin:0
}
.nonSelectText {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.blur_background {
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.fullscreen{
  width: 100vw;
  height: 100vh;
  position: fixed;
}

.test{
  width: 10vw;
  height: 10vw;
  position: fixed;
  background-color: red;
  z-index: 100;
}
.test:hover{
  background-color: blue;

}