.alert{padding:20px;background-color:#f44336;color:#fff;opacity:1;transition:opacity .6s;margin-bottom:15px;display:none}.alert.success{background-color:#4caf50}.alert.info{background-color:#2196f3}.alert.warning{background-color:#ff9800}.close-btn{margin-left:15px;color:#fff;font-weight:700;float:right;font-size:22px;line-height:20px;cursor:pointer;transition:.3s}.close-btn:hover{color:#000}