*
{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body 
{ 
  min-height: 100vh;
  background:rgba(255,255,255,0);
  overflow: hidden;
  /*background: #1e2759;*/
}
ul 
{  width: 580px;
  display: flex;
  justify-content: center;
  margin: 0;
  position: fixed;
  bottom: -20px;
  transform: translate(-50%, -50%);
  left: 50%;
  right: 50%;
  border-radius: 10px;
  box-shadow: 0 5px 25px rgba(0,0,0,0.25);

}
ul li 
{
  list-style: none;
}
ul li a 
{
  position: relative;
  color: #fff;
  text-decoration: none;
  display: inline-block;
  padding: 20px 30px;
  z-index: 1000;
  backdrop-filter: blur(15px);
}
ul li a ion-icon 
{
  font-size: 1em;
  pointer-events: none;
  opacity: 0.25;
  transition: 0.25s;
}
ul li.active a ion-icon
{
  opacity: 1;
}
#marker 
{ 
  position: absolute;
  top: 0;
  transition: 0.5s;
  z-index: 1;
}
#marker::before 
{
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 40px;
  border-radius: 8px; 
}
ul li:nth-child(1).active ~ #marker::before  
{
  background: #5da6ff;
  box-shadow: 0 0 15px #5da6ff,
  0 0 30px #5da6ff,
  0 0 45px #5da6ff,
  0 0 60px #5da6ff;
}
ul li:nth-child(2).active ~ #marker::before  
{
  background: #ff0;
  box-shadow: 0 0 15px #ff0,
  0 0 30px #ff0,
  0 0 45px #ff0,
  0 0 60px #ff0;
}
ul li:nth-child(3).active ~ #marker::before  
{
  background: #0f0;
  box-shadow: 0 0 15px #0f0,
  0 0 30px #0f0,
  0 0 45px #0f0,
  0 0 60px #0f0;
}
ul li:nth-child(4).active ~ #marker::before  
{
  background: #df2fff;
  box-shadow: 0 0 15px #df2fff,
  0 0 30px #df2fff,
  0 0 45px #df2fff,
  0 0 60px #df2fff;
}
ul li:nth-child(5).active ~ #marker::before  
{
  background: #ff308f;
  box-shadow: 0 0 15px #ff308f,
  0 0 30px #ff308f,
  0 0 45px #ff308f,
  0 0 60px #ff308f;
}