*{
    font-family: Arial, Helvetica, sans-serif;
    box-sizing: border-box;
}

body {
    background-color: rgb(0, 0, 0);
  }
  
  h1 {
      color: rgb(255, 255, 255);
      margin-left: 20px;
  }

    /* For mobile phones: */
    [class*="col-"] {
        width: 100%;
    }

    @media only screen and (min-width: 600px) {
    .col-1 {width: 8.33%;}
    .col-2 {width: 16.66%;}
    .col-3 {width: 25%;}
    .col-4 {width: 33.33%;}
    .col-5 {width: 41.66%;}
    .col-6 {width: 50%;}
    .col-7 {width: 58.33%;}
    .col-8 {width: 66.66%;}
    .col-9 {width: 75%;}
    .col-10 {width: 83.33%;}
    .col-11 {width: 91.66%;}
    .col-12 {width: 100%;}
    }

    [class*="col-"] {
        float: left;
        padding: 15px;
        border: 1px solid red; 
        }
    
    .row::after {
        content: "";
        clear: both;
        display: table;
        }
    
  #subtitle {
      color: rgb(255, 255, 255);
      margin-left: 20px;
  }

  #userDetails {
      color: rgb(255, 255, 255);
      margin-left: 20px;
  }

  #score , #highScore {
      color: rgb(255, 255, 255);
      margin-left: 20px;
  }

  #login , #logout, #playNoLogin {
      background-color: rgb(0, 0, 0);
      margin-left: 20px;
      border: 2px solid;
      border-color: white;
      color: white;
      padding: 10px;
      text-align: center;
  }

  #gc {
      margin-top: 20px;
      margin-left: 20px;
      margin-right: 20px;
  }

  a {
      margin-top: 20px;
      color: white;
      font-size: 8px;
  }