#brochure-download-popup {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: none;
  z-index: 9999;
}
.popup-inner {
  background: #fff;
  max-width: 500px;
  margin: 5% auto;
  padding: 20px;
  position: relative;
}
.popup-close {
  position: absolute;
  right: 15px;
  top: 10px;
  font-size: 24px;
  background: none;
  border: none;
  cursor: pointer;
}
.spinner-outer {
  text-align: center;
  padding: 2em;
}
.spinner {
  border: 4px solid #ccc;
  border-top: 4px solid #3F5EFF;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  margin: auto;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  100% { transform: rotate(360deg); }
}