simpleNotification.css

@keyframes fadeout {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes shorten {
    from {
        width: 100%;
    }
    to {
        width: 0;
    }
}

.gn-wrapper {
    position: fixed;
    overflow: hidden;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    z-index: 1080;
}

.gn-top-right,
.gn-bottom-right {
    align-items: flex-end;
}
.gn-top-left,
.gn-bottom-left {
    align-items: flex-start;
}

.gn-top-right {
    top: 0;
    right: 0;
}

.gn-top-left {
    top: 0;
    left: 0;
}

.gn-bottom-right {
    bottom: 0;
    right: 0;
}

.gn-bottom-left {
    bottom: 0;
    left: 0;
}

.gn-notification {
    /*border: 1px solid black;*/
    box-shadow: 1px 1px 3px black;
    border-radius: 3px;
    overflow: hidden;
    margin: 1rem;
    cursor: pointer;
    animation-duration: 1000ms;
    animation-timing-function: cubic-bezier(0.165, 0.84, 0.44, 1);
    animation-fill-mode: forwards;
    pointer-events: all;
    min-width: 20rem;
    max-width: 30rem;
}

.gn-notification h1 {
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(0, 0, 0, 0.4);
}

.gn-fadeout {
    animation-name: fadeout;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
}

.gn-content {
    display: flex;
    flex: 1;
    align-content: space-between;
    align-items: center;
}

.gn-content img {
    max-width: 40%;
    max-height: 20rem;
    flex-shrink: 0;
}

.gn-content p {
    max-width: 100%;
    white-space: pre-line;
}

.gn-content img:only-child,
.gn-content p:only-child {
    max-width: 100%;
}

.gn-notification h1,
.gn-content p {
    padding: 0.5rem;
    margin: 0;
}

.gn-lifespan {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #4dd0e1;
    transition-property: width;
    transition-timing-function: linear;
}

.gn-extinguish {
    animation-name: shorten;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
}

.gn-success {
    background-color: #689f38;
    color: white;
}

.gn-info {
    background-color: #0288d1;
    color: white;
}

.gn-error {
    background-color: #e53935;
    color: white;
}

.gn-warning {
    background-color: #ff8f00;
    color: white;
}

.gn-message {
    background-color: #333333;
    color: white;
}