.feedback {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  width: 20vw;
  height: 40vh;
  min-width: 320px;
  margin: auto;
  z-index: 999;
  background: #fff;
  border-radius: 10px;
  display: flex;
  flex-flow: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  visibility: hidden;
}
.feedback.visible {
  visibility: visible;
}
.feedback::before {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  content: '';
  display: block;
  background: rgba(0, 0, 0, 0.6);
  z-index: 0;
}
.feedback::after {
  position: absolute;
  content: '';
  display: block;
  background: white;
  z-index: 1;
  width: 100%;
  height: 100%;
}
.feedback .feedback-animation {
  position: relative;
  width: 100%;
  height: 50%;
  background: #116eee;
  z-index: 2;
}
.feedback .feedback-content {
  flex: 1;
  position: relative;
  z-index: 2;
  display: flex;
  flex-flow: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
}
.feedback .feedback-content h1 {
  font-size: 20px;
  margin: 0;
}
.feedback .feedback-content h1 + p {
  margin-top: 10px;
}
.feedback .feedback-content button {
  margin-top: 20px;
}