extenCard.css

html {
    overflow-x: hidden;
}

.exten-card {
    --exten-card-width: 180px;
    --exten-card-height: 100px;
    width: var(--exten-card-width);
    height: var(--exten-card-height);
    padding: 5px 10px;
    position: absolute;
    top: calc(1px - var(--exten-card-height));
    right: calc(100vw - 50% - 90px);
    background-color: orangered;
    transition: 500ms all;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    flex-direction: column;
    text-align: center;
    animation: disappear 2s;
    border-radius: 5px;
    text-decoration: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.03);
}

.exten-card .exten-desc {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.exten-card .exten-auth {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
}

.exten-card .exten-auth .exten-name {
    border-bottom: 1px solid rgba(255, 255, 255, 0.85);
}

.exten-card:hover {
    top: 10px;
    cursor: pointer;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.02), 0 3px 6px rgba(0, 0, 0, 0.23);
}

@keyframes disappear {
    0% {
        top: 10px;
    }

    50% {
        top: 10px;
    }

    75% {
        top: 10px;
    }

    100% {
        top: -95px;
    }
}