.lds-dual-ring,
.lds-dual-ring:after {
  box-sizing: border-box;
}

.lds-dual-ring {
  display: inline-block;
  width: 5rem;      /* 80px */
  height: 5rem;     /* 80px */
}

.lds-dual-ring:after {
  content: " ";
  display: block;
  width: 4rem;      /* 64px */
  height: 4rem;     /* 64px */
  margin: 0.5rem;   /* 8px */
  border-radius: 50%;
  border: 0.4rem solid; /* 6.4px */
  border-color: #755714 transparent #b59700 transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

#custom-calculator #loader {
  display: none;
  margin: 1rem auto;
  text-align: center;
}