#logo-slider {
    position: relative;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 65%;
    height: 9em;
    margin: auto;
    overflow: hidden;
}

button.arrow {
    border: none;
}

#logo-slider .arrow {
    cursor: pointer;
    position: absolute;
    width: 2em;
    height: 100%;
    padding: 0;
    margin: 0;
    outline: 0;
    background: transparent;
}

    #logo-slider .arrow:hover {
        background: rgba(0, 0, 0, 0.1);
    }

    #logo-slider .arrow:before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 0.75em;
        height: 0.75em;
        margin: auto;
        border-style: solid;
    }

#logo-slider .prev {
    left: 0;
    bottom: 0;
}

    #logo-slider .prev:before {
        left: 0.25em;
        border-width: 3px 0 0 3px;
        border-color: #333 transparent transparent #333;
        transform: rotate(-45deg);
    }

#logo-slider .next {
    right: 0;
    bottom: 0;
}

    #logo-slider .next:before {
        right: 0.25em;
        border-width: 3px 3px 0 0;
        border-color: #333 #333 transparent transparent;
        transform: rotate(45deg);
    }

#logo-slider .logo-slider-frame {
    position: absolute;
    top: 0;
    left: 2em;
    right: 2em;
    bottom: 0;
    border-left: 0.25em solid transparent;
    border-right: 0.25em solid transparent;
    overflow: hidden;
}

#logo-slider .logo-slider-item {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 25%;
    height: 90%;
}

#logo-slider .logo-slider-inset {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: -50px;
    margin: 2.1em 0.25em;
    overflow: hidden;
}

@media ( max-width: 60em ) {
    #logo-slider .logo-slider-item {
        width: 33.33%;
    }

    #logo-slider {
        height: 10em;
    }
}

@media ( max-width: 45em ) {
    #logo-slider .logo-slider-item {
        width: 50%;
    }

    #logo-slider {
        height: 12em;
    }
}

@media ( max-width: 30em ) {
    #logo-slider .logo-slider-item {
        width: 100%;
    }

    #logo-slider {
        height: 12em;
    }
}