.alert-box {
  background-color: #eeeeee;
  position: absolute; /* or fixed */
  top: 100px;
  left: 100px;
}

.alert-box__header {
  background-color: #aaaaaa;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0px 5px;
}

.alert-box__header__close-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 1rem;
  width: 1rem;
  color: red;
  border: 1px solid #333333;
  background-color: white;
}

.alert-box__body {
  border: 5px solid #aaaaaa;
  padding: 10px;
  color: black;
}