.loader {
    position: fixed;
    
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    transition: opacity 0.75s, visibility 0.75s;
  }
  
  .loader-hidden {
    opacity: 0;
    visibility: hidden;
  }
  
  .loader::after {
    content: "";
    width: 75px;
    height: 75px;
    border: 15px solid #dddddd;
    border-top-color: #009578;
    border-radius: 50%;
    animation: loading 2s linear infinite;
  }
  
  @keyframes loading {
      0%{
       transform: rotate(0deg);
       filter: hue-rotate(0deg);
      }
  
      100%{
          transform: rotate(360deg);
          filter: hue-rotate(360deg);
         }
  }