/* author: https://codepen.io/onload/pen/YggYzZ
Onload
 */

#ocean {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(#045c7c, #0d324e);
  }
  body {
    margin: 0;
    height: 100%;
    overflow: hidden;
  }
  
  #overlay {
    background: white;
    font-family: "Allerta Stencil", sans-serif;
    font-size: 1em;
    opacity: 0.75;
    position: absolute;
    width: 100%;
    height: 100%;
    display: none;
    top: 0;
    left: 0;
  }
  
  #settings {
    margin-top: 50px;
    font-size: 2.8em;
  }
  #parameter {
    margin-top: 50px;
    font-size: 1.1em;
  }
  
  #holder {
    width: 40%;
    margin-left: auto;
    margin-right: auto;
  }
  
  #parameter {
    width: 100%;
    margin-top: 20px;
    text-align: center;
  }
  
  #settings {
    text-align: center;
  }
  
  .slidecontainer {
    width: 100%;
  }
  
  .slider:hover {
    opacity: 0.85;
  }
  
  .slider {
    -webkit-appearance: none;
    margin-top: 30px;
    width: 100%;
    height: 2px;
    border-radius: 5px;
    background: #d3d3d3;
    outline: none;
    opacity: 0.25;
    -webkit-transition: 0.2s;
    transition: opacity 0.2s;
  }
  
  .slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    display: inline-block;
    margin-left: 0px;
    height: 45px;
    border-radius: 100%;
    width: 45px;
    border: solid black 6px;
    cursor: pointer;
  }
  
  .slider::-moz-range-thumb {
    display: inline-block;
    margin-left: 0px;
    height: 50px;
    border-radius: 100%;
    width: 50px;
    border: solid black 4px;
    cursor: pointer;
  }
  
  #button {
    margin-top: 40px;
    width: 100%;
    background-color: white;
    color: black;
    border: 3px solid #555555;
    font-size: 1.75em;
    font-family: "Allerta Stencil", sans-serif;
  }
  
  #button:hover {
    background-color: #555555;
    color: white;
  }