.loader{
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000000c7;
    transition: opacity 1.75s, visibility 2.25s;
    z-index: 999;
  }
  .loader-hidden{
    opacity: 0;
    visibility: hidden;
  }
  
  .loader::after{
    content: "";
    width: 75px;
    height: 75px;
    border: 15px solid #c2c2c2;
    border-top-color: #00ffff;
    border-radius: 50%;
    animation: loading 1.75s ease infinite;
  }
  
  @keyframes loading {
    from{
      transform: rotate(0turn);
    }
    to{
       transform: rotate(1turn);
    }
  }