.loader {
  border: 7px solid #f3f3f3;
  border-radius: 50%;
  border-top: 7px solid #337ab5;
  width: 40px;
  height: 40px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

@-webkit-keyframes spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
.custom-select {
  display: inline-block;
  width: 100%;
  height: calc(2.25rem + 2px);
  padding: 0.375rem 1.75rem 0.375rem 0.75rem;
  line-height: 1.5;
  color: #495057;
  vertical-align: middle;
  background: #fff url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'%3E%3Cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3E%3C/svg%3E") no-repeat right 0.75rem center;
  background-size: 8px 10px;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}
.custom-select:focus {
  border-color: #80bdff;
  outline: 0;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.075), 0 0 5px rgba(128, 189, 255, 0.5);
}
.custom-select:focus::-ms-value {
  color: #495057;
  background-color: #fff;
}
.custom-select[multiple], .custom-select[size]:not([size="1"]) {
  height: auto;
  padding-right: 0.75rem;
  background-image: none;
}
.custom-select:disabled {
  color: #6c757d;
  background-color: #e9ecef;
}
.custom-select::-ms-expand {
  opacity: 0;
}
.custom-select-sm {
  height: calc(1.8125rem + 2px);
  padding-top: 0.375rem;
  padding-bottom: 0.375rem;
  font-size: 75%;
}
.custom-select-lg {
  height: 46px;
  padding-top: 0.275rem;
  padding-bottom: 0.375rem;
  font-size: 125%;
}