.modal-form-user{
  display:flex;
  flex:1;
  justify-content: center;
  align-items: center;
  position: fixed;
  top:0px;
  left:0px;
  width:100%;
  height:100%;
  z-index:100000000;
  background: rgba(0, 0, 0, 0.7)
}

.modal-form-user > form{
  max-width:320px;
  position: relative;
  width:100%;
}

.modal-form-user > form .close{
  position: absolute;
right: 6px;
top: -4px;
font-size: 30px;
font-weight: bold;
cursor: pointer;
}