style.css

#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}

.uploadButton {
  box-shadow: none;
  border-radius: 0px;
}

@keyframes spinner-line-fade-more {
  0%, 100% {
    opacity: 0; /* minimum opacity */
  }
  1% {
    opacity: 1;
  }
}

@keyframes spinner-line-fade-quick {
  0%, 39%, 100% {
    opacity: 0.25; /* minimum opacity */
  }
  40% {
    opacity: 1;
  }
}

@keyframes spinner-line-fade-default {
  0%, 100% {
    opacity: 0.22; /* minimum opacity */
  }
  1% {
    opacity: 1;
  }
}

@keyframes spinner-line-shrink {
  0%, 25%, 100% {
    /* minimum scale and opacity */
    transform: scale(0.5);
    opacity: 0.25;
  }
  26% {
    transform: scale(1);
    opacity: 1;
  }
}