.alert {
    padding: 20px;
    background-color: #f44336;
    
    color: white;
    opacity: 1;
    
    transition: opacity 0.6s;
    margin-bottom: 15px;
    
    margin-top: 40px;
    max-width: 350px;
}

.alert.success {background-color: #4CAF50;}
.alert.info {background-color: #2196F3;}
.alert.warning {background-color: #ff9800;}

.closebtn {
  margin-left: 15px;
  color: white;
  font-weight: bold;
  float: right;
  font-size: 22px;
  line-height: 20px;
  cursor: pointer;
  transition: 0.3s;
}

.closebtn:hover {
  color: black;
}