.header {
  background-color: #d8e364;
}

.button {
  border: 1px solid black;
  color: white;
  padding: 0px 2px;
  margin: 10px 2px;
  text-align: center;
  text-decoration: solid;
  font-size: 20px;
  cursor: pointer;
  border-radius: 5px;
  background-color: #5099f4;
}

.disabled {
  pointer-events: none;
  opacity: 0.3;
}

/* A pure CSS based spinner based on ideas from https://loading.io/css
   This consists of 12 small circles (each one div) in a bigger circular
   arrangement, where they turn on/off forming a progress wheel.
   We use this pattern to avoid CPU intensive transforms like rotate(). */

.lds-default {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;
}
.lds-default div {
  position: absolute;
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: lds-default 3s linear infinite;
}
.lds-default div:nth-child(1) {
  animation-delay: 0s;
  top: 37px;
  left: 66px;
}
.lds-default div:nth-child(2) {
  animation-delay: 0.1s;
  top: 22px;
  left: 62px;
}
.lds-default div:nth-child(3) {
  animation-delay: 0.2s;
  top: 11px;
  left: 52px;
}
.lds-default div:nth-child(4) {
  animation-delay: 0.3s;
  top: 7px;
  left: 37px;
}
.lds-default div:nth-child(5) {
  animation-delay: 0.4s;
  top: 11px;
  left: 22px;
}
.lds-default div:nth-child(6) {
  animation-delay: 0.5s;
  top: 22px;
  left: 11px;
}
.lds-default div:nth-child(7) {
  animation-delay: 0.6s;
  top: 37px;
  left: 7px;
}
.lds-default div:nth-child(8) {
  animation-delay: 0.7s;
  top: 52px;
  left: 11px;
}
.lds-default div:nth-child(9) {
  animation-delay: 0.8s;
  top: 62px;
  left: 22px;
}
.lds-default div:nth-child(10) {
  animation-delay: 0.9s;
  top: 66px;
  left: 37px;
}
.lds-default div:nth-child(11) {
  animation-delay: 1.0s;
  top: 62px;
  left: 52px;
}
.lds-default div:nth-child(12) {
  animation-delay: 1.1s;
  top: 52px;
  left: 62px;
}
@keyframes lds-default {
  0%, 50% {
    display: none;
  }
  90% {
    display: block;
  }
}