#slider-container {
    /*width: 87%;*/
    width: auto;
    height: 600px;
    position: relative;
}

#slider-container img {
    width: 100%;
    /*height: 100%;*/
    position: absolute;
    top: 0;
    left: 0;
    transition: opacity 1s ease-in-out;
}

#slider-container img:first-child {
    opacity: 1;
}

#slider-container img:not(:first-child) {
    opacity: 0;
}

#slider-container img.active {
    opacity: 1;
}

#prev-button,
#next-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: #1e347c;
    color: #fff;
    padding: 10px;
    border: none;
    cursor: pointer;
}

@media only screen and (max-width: 600px) {
    #slider-container {
      width: 100%;
      height: 250px;
      position: relative;
    }

    #prev-button,
    #next-button {
        position: absolute;
        /*top: 50%;*/
        transform: translateY(-50%);
        background-color: #1e347c;
        color: #fff;
        padding: 10px;
        border: none;
        cursor: pointer;
    }
}

#prev-button {
    left: 0;
}

#next-button {
    right: 0;
}

#prev-button:hover,
#next-button:hover {
    background-color: silver;
    color: #000;
}