.logo {
  background-image: url(../img/logo.png);
  background-repeat: no-repeat;
  background-size: cover;
  width: 145px;
  height: 40px;
}

.failed {
  display: inline-block;
  background-color: #ff4d4d;
  width: 30px;
  height: 30px;
  vertical-align: baseline;
  text-align: center;
  color: #fff;
  border-radius: 50%;
}

.require {
  color: #dc3545;
}
.flex {
  display: flex;
  justify-content: center;
  align-items: center;
}