body {
    background: #43cea2;
    background: -webkit-linear-gradient(to right, #185a9d, #43cea2);
    background: linear-gradient(to right, #185a9d, #43cea2); 
}
#contenido {
    background-color: white;
    margin-top: 40px;
    -webkit-box-shadow: 0 8px 10px 1px rgba(0,0,0,0.14), 0 3px 14px 2px rgba(0,0,0,0.12), 0 5px 5px -3px rgba(0,0,0,0.3);
    box-shadow: 0 8px 10px 1px rgba(0,0,0,0.14), 0 3px 14px 2px rgba(0,0,0,0.12), 0 5px 5px -3px rgba(0,0,0,0.3);
}
#contenido::after {
    clear: both;
    display: block;
    content: '';
}
header {
    padding: 10px;
    text-align: center;
    color: white;
    font-size: 22px;
    font-family: 'Raleway', sans-serif;
    font-weight: 100;
}
form {
    margin: 30px 0;
}
#loaders {
    text-align: center;
}
#resetBtn {
    float: right;
}

#spinner {
    display: none;
    justify-content: center;
    padding: 3rem 0;
}


.sk-chase {
    width: 40px;
    height: 40px;
    position: relative;
    animation: sk-chase 2.5s infinite linear both;
  }
  
  .sk-chase-dot {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0; 
    animation: sk-chase-dot 2.0s infinite ease-in-out both; 
  }
  
  .sk-chase-dot:before {
    content: '';
    display: block;
    width: 25%;
    height: 25%;
    background-color: #0288d1;
    border-radius: 100%;
    animation: sk-chase-dot-before 2.0s infinite ease-in-out both; 
  }
  
  .sk-chase-dot:nth-child(1) { animation-delay: -1.1s; }
  .sk-chase-dot:nth-child(2) { animation-delay: -1.0s; }
  .sk-chase-dot:nth-child(3) { animation-delay: -0.9s; }
  .sk-chase-dot:nth-child(4) { animation-delay: -0.8s; }
  .sk-chase-dot:nth-child(5) { animation-delay: -0.7s; }
  .sk-chase-dot:nth-child(6) { animation-delay: -0.6s; }
  .sk-chase-dot:nth-child(1):before { animation-delay: -1.1s; }
  .sk-chase-dot:nth-child(2):before { animation-delay: -1.0s; }
  .sk-chase-dot:nth-child(3):before { animation-delay: -0.9s; }
  .sk-chase-dot:nth-child(4):before { animation-delay: -0.8s; }
  .sk-chase-dot:nth-child(5):before { animation-delay: -0.7s; }
  .sk-chase-dot:nth-child(6):before { animation-delay: -0.6s; }
  
  @keyframes sk-chase {
    100% { transform: rotate(360deg); } 
  }
  
  @keyframes sk-chase-dot {
    80%, 100% { transform: rotate(360deg); } 
  }
  
  @keyframes sk-chase-dot-before {
    50% {
      transform: scale(0.4); 
    } 100%, 0% {
      transform: scale(1.0); 
    } 
  }