.input-text {
    position: relative;
  width: 60%;
  height: 50px;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 16px;
  top: 10px;
  margin-bottom: 10px;
  left: 50%;
  background-color: #ccc;
  transform: translateX(-50%);
}

.invisible {
    display: none;
}
.visible {
  z-index: 990;
}
.background-invisible {
  display: none;
}
.background-visible {
  display: block;
}