body {
    font: normal 16px Arial, sans-serif;
}
.bg-1 { 
  background-color: LightSlateGray; /*#1abc9c;*/
  color: #ffffff;
}
.bg-2 { 
  background-color: #474e5d;
  color: #ffffff;
}
.bg-3 { 
  background-color: #ffffff;
  color: #555555;
}
.container-fluid {
  padding: 50px;
}
.footer {
     position: fixed;
     left: 0;
     bottom: 0;
     width: 100%;
     background-color: DimGray; /*DarkSlateBlue;*/
     padding-top: 1em;
     color: white;
     text-align: center;
}
#title {
    font: 17px Arial, sans-serif;
}
#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: YellowGreen;
  color: white;
  cursor: pointer;
  padding: 10px 15px;
  border-radius: 50%;
}

#myBtn:hover {
  background-color: DarkCyan; /*#555;*/
}

ul.timeline {
    list-style-type: none;
    position: relative;
}
ul.timeline:before {
    content: ' ';
    background: #d4d9df;
    display: inline-block;
    position: absolute;
    left: 29px;
    width: 2px;
    height: 100%;
    z-index: 400;
}
ul.timeline > li {
    margin: 20px 0;
    padding-left: 20px;
}
ul.timeline > li:before {
    content: ' ';
    background: white;
    display: inline-block;
    position: absolute;
    border-radius: 50%;
    border: 3px solid #22c0e8;
    left: 20px;
    width: 20px;
    height: 20px;
    z-index: 400;
}


/*https://htmlcolorcodes.com/color-names/*/