body{
    background-color: lightgray;
  }
  
  h1{
    color:blue;
    text-align: center;
  
  }
  
  
  ul.menu {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color:gold;
    
  }
  
  li {
    float: left;
    
  }
  
  li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
  }
  
  li a:hover {
    background-color: #16da78;
    
  }
  
  .split {
    height: 100%;
    /* width: 50%; */
    position: fixed;
    z-index: 1;
    top: 0;
    overflow-x: hidden;
    padding-top: 20px;
  }
  
  .left {
    margin-top: 10%;
    width: 30%;  
    left: 0;
    background-color:cyan;
  }
  
  .right {
    margin-top: 10%;
    position: absolute;
    left: 31%;
    right: 0;
    background-color:coral;
  }
  
  table {
    width: 100%;
  }
  
  table,
  th,
  td {
    text-align: center;
    border: 1px solid black;
    border-collapse: collapse;
    white-space: pre-wrap;
    word-wrap: break-word;
  
  }
  
  th {
    width: 150%;
    height: 50px;
    background-color:#16da78;
    color: rgb(4, 15, 1);
    border: 1px solid black;
  
  
  }
  tr:nth-child(even) {
    background-color: #81c8ec;
  }
  
  .btn_download{
    background-color: red;
  }

  .blink {
    animation: blink 1s steps(1, end) infinite;
   
  }

  @keyframes blink {
    0% {
      opacity: 1;
      
    }

    50% {
      opacity: 0.5;
      
    }

    100% {
      opacity: 1;
      
    }
  }

  .blink_color{
   
   background-color: yellow;
  }