index.css

* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: Arial;
    font-size: 17px;
    background-image: url("https://user-images.githubusercontent.com/56151722/129672587-97eb09f7-3fc3-401c-aad4-c5c79c5b32dc.gif");

    background-size: cover;
    background-repeat: no-repeat;
    
  }
  textarea {
      -webkit-box-sizing: border-box;
      -moz-box-sizing: border-box;
      box-sizing: border-box;
  
      width: 100%;
      border: 2px solid rgb(153, 14, 158);
      
  }
  #myVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%; 
    min-height: 100%;
  }
  
  .content {
    position: fixed;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    color: #f1f1f1;
    width: 100%;
    padding: 20px;
    text-align: center;
  }
  
  
  #myBtn {
    width: 100px;
    font-size: 18px;
    padding: 8px;
    border: none;
    background: #000;
    color: #fff;
    cursor: pointer;
  }
  
  h3{
    color : red;
    text-shadow: 0px 0px 0 rgb(206,206,206),
                   -1px 1px 0 rgb(157,157,157),
                   -2px 2px 0 rgb(107,107,107),
                   -3px 3px 0 rgb(58,58,58),
                   -4px 4px 0 rgb(9,9,9),
                   -5px 5px  0 rgb(-40,-40,0),
                   -6px 6px 5px rgba(96,245,10,1),
                   -6px 6px 1px rgba(96,245,10,0.5),
                   0px 0px 5px rgba(96,245,10,.2);
   }
  
  
  
  
  #myBtn:hover {
    background: #ddd;
    color: black;
  }