style.css

.fondo{
  /*background-color: #f2f2f2;*/
}

.border-material {
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 5px;
}

.box-shadow {
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.mat-tab-label {
  font-size: 14px;
  font-weight: 500;
  color: #212529;
  text-transform: uppercase;
  padding: 0px 10px;
  margin: 0px;
  min-width: 0px;
  border-radius: 0px;
  border: none;
  outline: none;
  border-bottom: 1px solid #e5e5e5;
}



.button-rainbow {
  animation: rainbow 3s infinite, heartbeat 0.6s infinite;
  background: #c0392b;
}

@keyframes rainbow {
  0% {
    background: #1abc9c;
  }

  10% {
    background: #2ecc71;
  }

  20% {
    background: #3498db;
  }

  30% {
    background: #9b59b6;
  }

  40% {
    background: #e74c3c;
  }

  50% {
    background: #e67e22;
  }

  60% {
    background: #f1c40f;
  }

  70% {
    background: #2c3e50;
  }

  80% {
    background: #9b59b6;
  }
}