.loading {
    position: fixed;
    z-index: 999;
    height: 5em;
    width: 5em;
    overflow: show;
    margin: auto;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
  }
  
  /* Transparent Overlay */
  .loading:before {
    content: '';
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
  }
  .was-validated .form-control:invalid, .form-control.is-invalid {
    border-color: #dc3545;
    padding-right: 2.25rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
  }
  
  .invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 100%;
    color: #dc3545;
  }
  
  .form-control.is-invalid, .was-validated .form-control:invalid {
    border-color: #dc3545;
    padding-right: 2.25rem;
    background-image: url(data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e);
    background-repeat: no-repeat;
    background-position: right calc(.375em + .1875rem) center;
    background-size: calc(.75em + .375rem) calc(.75em + .375rem);
}
  /* :not(:required) hides these rules from IE9 and below */
  .loading:not(:required) {
    /* hide "loading..." text */
    font: 0/0 a;
    color: transparent;
    text-shadow: none;
    background-color: transparent;
    border: 0;
  }
  
  .loading:not(:required):after {
    content: '';
    display: block;
    font-size: 10px;
    width: 2em;
    height: 2em;
    margin-top: -0.5em;
    -webkit-animation: spinner 1500ms infinite linear;
    -moz-animation: spinner 1500ms infinite linear;
    -ms-animation: spinner 1500ms infinite linear;
    -o-animation: spinner 1500ms infinite linear;
    animation: spinner 1500ms infinite linear;
    border-radius: 0.5em;
    -webkit-box-shadow: #ffcc00 1.5em 0 0 0, #ffcc00 1.1em 1.1em 0 0, #ffcc00 0 1.5em 0 0, #ffcc00 -1.1em 1.1em 0 0, #ffcc00 -1.5em 0 0 0, #ffcc00 -1.1em -1.1em 0 0, #ffcc00 0 -1.5em 0 0, #ffcc00 1.1em -1.1em 0 0;
    box-shadow: #fff 1.5em 0 0 0, #007bff 1.1em 1.1em 0 0, #fff 0 1.5em 0 0, #007bff -1.1em 1.1em 0 0, #fff -1.5em 0 0 0, #007bff -1.1em -1.1em 0 0, #fff 0 -1.5em 0 0, #007bff 1.1em -1.1em 0 0;
  }
  
  /* Animation */
  
  @-webkit-keyframes spinner {
    0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  @-moz-keyframes spinner {
    0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  @-o-keyframes spinner {
    0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  @keyframes spinner {
    0% {
      -webkit-transform: rotate(0deg);
      -moz-transform: rotate(0deg);
      -ms-transform: rotate(0deg);
      -o-transform: rotate(0deg);
      transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
      -moz-transform: rotate(360deg);
      -ms-transform: rotate(360deg);
      -o-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  /* Center the loader */
  #loader {
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: 1;
    width: 150px;
    height: 150px;
    margin: -75px 0 0 -75px;
    border: 16px solid #f3f3f3;
    border-radius: 50%;
    border-top: 16px solid #ffcc00;
    border-bottom:16px solid #ffcc00;
    width: 120px;
    height: 120px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
  }
  
  @-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  /* Add animation to "page content" */
  .animate-bottom {
    position: relative;
    -webkit-animation-name: animatebottom;
    -webkit-animation-duration: 1s;
    animation-name: animatebottom;
    animation-duration: 1s
  }
  
  @-webkit-keyframes animatebottom {
    from { bottom:-100px; opacity:0 } 
    to { bottom:0px; opacity:1 }
  }
  
  @keyframes animatebottom { 
    from{ bottom:-100px; opacity:0 } 
    to{ bottom:0; opacity:1 }
  }