body{
    background-color: #ceecef;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.margin-auto-center{
    margin: auto;
}

.cards{
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: center;
}

.ripple {
    background-position: center;
    border-radius: 50%;
    transition: background 0.5s;
}
  
.ripple:hover {
  background: rgba(182, 180, 180, 0.33);
}

.ripple:active {
  background-color: rgba(182, 180, 180, 0.563);
  background-size: 100%;
  transition: background 0s;
}

.lds-ring {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;
}
.lds-ring div {
  box-sizing: border-box;
  display: block;
  position: absolute;
  width: 64px;
  height: 64px;
  margin: 8px;
  border: 8px solid #030d4f;
  border-radius: 50%;
  animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
  border-color: #030d4f transparent transparent transparent;
}
.lds-ring div:nth-child(1) {
  animation-delay: -0.45s;
}
.lds-ring div:nth-child(2) {
  animation-delay: -0.3s;
}
.lds-ring div:nth-child(3) {
  animation-delay: -0.15s;
}
@keyframes lds-ring {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}