style.css

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

a {
  color: white;
  text-decoration: none;
}
a:hover {
  color: lightblue;
}

body {
  bottom: 0;
  font-family: "Titillium Web", sans-serif;
  color: white;
  left: 0;
  margin: 0;
  position: absolute;
  right: 0;
  top: 0;
  transform-origin: 0px 0px;
  overflow: hidden;
}

.container {
  position: absolute;
  background-color: #596e73;
  height: 720px;
  width: 1280px;
}

.input_video {
  position: relative;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}
.input_video.selfie {
  transform: scale(-1, 1);
}

.output_canvas {
  position: absolute;
  left: 0;
  top: 0;
}

.control-panel {
  position: absolute;
  right: 10px;
  top: 10px;
}

.loading {
  display: flex;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  align-items: center;
  backface-visibility: hidden;
  justify-content: center;
  opacity: 1;
  transition: opacity 1s;
}
.loading .message {
  font-size: x-large;
}
.loading .spinner {
  position: absolute;
  width: 120px;
  height: 120px;
  animation: spin 1s linear infinite;
  border: 32px solid #bebebe;
  border-top: 32px solid #3498db;
  border-radius: 50%;
}

.loaded .loading {
  opacity: 0;
}

.control-panel-text.button {
  cursor: pointer;
  background-color: #2c5ff9;
}