style.css

@import url('https://fonts.googleapis.com/css2?family=Oxygen:wght@300&display=swap');

body{
background-color: #979797;
display: flex;
}

*{
font-family: Oxygen;
}

.card{
background-color: #ffffff;
padding: 20px;
width: 100px;
height: 100px;
display: inline-flex;
justify-content: center;
align-items: center;
border-radius: 20px;
cursor: pointer;
margin: 10px;
}

.player{
margin-bottom: 10px;
}

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 9999;
  }

  *{
  text-align: center;
  outline: none;
  }

  input{
  border: none;
  border-bottom: 1px solid #000000;
  background: none;
  outline: none;
  padding-bottom: 5px;
  }

  button{
  border: none;
  outline: none;
  background: #00b412;
  color: #ffffff;
  padding: 10px 20px;
  border-radius: 10px;
  margin-left: 15px;
  margin-bottom: 15px;
  margin-top: 10px;
  }

  a{
    color:black;
  }

  .overlay{
    position: fixed; 
    background-color: #979797;
    z-index: 100000;
    display: none;
  align-items: center;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  overflow-y: scroll !important;
  }

  .overlay-content{
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    border-radius: 10px;
    overflow-y: scroll !important;
  }


  code{
    font-family: 'Courier New', Courier, monospace !important;
  }

  button{
    cursor: pointer !important;
  }