body {
  background: #000000;  /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #434343, #000000);  /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #434343, #000000); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

  }
  #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 #3498db;
    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 }
  }
  
  #myDiv {
    display: none;
    text-align: center;
  }
  /*CSS para las tabs de insertar workflow
/* Mark input boxes that gets an error on validation: */
input.invalid {
  background-color: #ffdddd;
}

/* Hide all steps by default: */
.tab {
  display: none;
}

/* Make circles that indicate the steps of the form: */
.step {
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbbbbb;
  border: none; 
  border-radius: 50%;
  display: inline-block;
  opacity: 0.5;
}

/* Mark the active step: */
.step.active {
  opacity: 1;
}

/* Mark the steps that are finished and valid: */
.step.finish {
  background-color: #4CAF50;
}
.centrado{
  margin-left: auto;
  margin-right: auto;
}
img.small{
  width: 50px; height: 50px;
}
img.medium{
  width: 100px; height: 100px;
}
.error {
  border-color: red;
}
 
.warning {
  border-color: yellow;
}