.yearSelect {
   width: 80px;
}

.monthSelect {
   width: 60px;
}

.daySelect {
   width: 60px;
}

.levelSelect {
   width: 80px;
}

.form-center {
    display:flex;
    justify-content: center;
}

.h3-center {
    text-align: center;
}

.table-center {
  margin-left: auto; 
  margin-right: auto;
}