send/app/templates/progress/progress.css

.progress {
  margin-top: 3px;
}

.progress__bg {
  stroke: #eee;
  stroke-width: 0.75em;
}

.progress__bar {
  stroke: #3b9dff;
  stroke-width: 0.75em;
  transition: stroke-dashoffset 300ms linear;
}

.progress__indefinite {
  stroke: #3b9dff;
  stroke-width: 0.75em;
  animation: 1s linear infinite spin;
  transform-origin: center;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.progress__percent {
  font-family: 'Segoe UI', 'SF Pro Text', sans-serif;
  font-size: 43.2px;
  letter-spacing: -0.78px;
  line-height: 58px;
  user-select: none;
}

.progress--invisible {
  display: none;
}