.container{
  height: 100%
}

.form-signing{
  top: 50%;
  left: calc(50vw - 175px);
  position: absolute;
  transform: translateY(-50%);
  margin: 0 auto;
  max-width: 350px;
  width: 350px;
  padding: 30px;
}

.form-check{
    text-align: left;
}