style.css

.notify-main-container {
    width: 'auto';
    position: absolute;
    right:0;
    max-width: 350px;
    height: 'auto';
    display: block;
    z-index: 1;
}
.alert {
    margin-bottom: 0 !important;

    max-height: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    height: auto;
    background-color:rgba(0, 0, 0, 0.5);
    flex-flow: row nowrap;
}
.progress-bar {
    height: 3px;
}
.progress {
    height: auto !important;
}
.alert-text {
    animation: in 0.9s ease-in-out forwards;
}

.notify-item {
    animation: in 0.3s ease-in-out forwards;
    width: 100%;
    float: right;
    -webkit-box-shadow: -6px 7px 35px -1px rgba(0, 0, 0, 0.73);
    box-shadow: -6px 7px 35px -1px rgba(0, 0, 0, 0.73);
    margin: 4px;
    z-index: 6;
    
}

@keyframes in {
    0% {
        width: 0%;
        font-size: 1%;
        text-align: center;
    }

    100% {
        width: 100%;
    }
}

@keyframes out {
    0% {
        width: 110%;
        transform: skewX(40deg);
        font-size: 50%;
    }

    50% {
        width: 120%;
        font-size: 50%;
    }
    100% {
        width: 0%;
        font-size: 50%;
    }
}