.master_box_alert {
  width: 300px;
  background-color: #3b9e80;
  position: relative;
  border-radius: 25px;
  margin: 0.5rem;
  padding: 0.5rem;
}
.ok_button {
  color: white;
  font-weight: bold;
  font-size: 1.2rem;
  background-color: transparent;
  border: 0px solid black;
  cursor: pointer;
  margin-left: auto;
  margin-right: 0.5rem;
  display: block;
}
.grayed_bg {
  background-color: rgb(0, 0, 0, 0.8);
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 0px;
  overflow: hidden;
  z-index: 100;
  display: grid;
  justify-content: center;
  align-items: center;
  opacity: 0;

  transition-duration: 0.5s;
  -webkit-transition-duration: 0.5s;
  -moz-transition-duration: 0.5s;
  -o-transition-duration: 0.5s;
}

.show_background {
  opacity: 100;
  background-color: rgb(0, 0, 0, 0.8);
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  z-index: 100;

  transition-duration: 0.5s;
  -webkit-transition-duration: 0.5s;
  -moz-transition-duration: 0.5s;
  -o-transition-duration: 0.5s;
}

.content_popup {
  color: white;
  padding: 0.5rem;
}