.contents{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  margin-top: -60px;
}

.group-input{
  display: flex;
  margin: 10px 0;
}

.message-operation{
  margin-bottom: 50px;
}

.name-input{
  width: 100px;
  text-align: right;
  text-wrap: nowrap;
  margin-right: 30px;
}

.form-control{
  width: 250px;
}

.btn-main-color{
  width: 250px;
  height: 80px;
  margin: 0 2rem;
}

.input-wrapper .invalid-feedback {
  min-height: 1.5em;
  display: block;
  /* font-size: 0.9em; */
}

.center-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100%;
  flex-direction: column;
  text-align: center;
}