.widget_headline {
    height: 34px;
    color: #757575;
    background-color: black;
    padding: 8px;
    text-align: center;
}

.widget_headline h2 {
    font-size: 20px;
    font-weight: normal;
    line-height: 5px;
}

.promo-widget-wrapper {
    width: 100%;
    height: 25vw;

    text-align: center;
    background-color: #1c1c1c;
}

.promo-widget {
    width: 24vw;
    height: 25vw;

    display: inline-block;
    background-size: cover;

    color: orange;
    cursor: pointer;

    opacity: 0.8;
}

.promo-widget:hover {
    opacity: 1;
}

.promo-widget:hover img {
    transform: rotate(90deg);
    transform: scale(1.1);

    animation-name: scaleIn;
    animation-duration: 1s;
}

.promo-widget img {
    height: 4vw;
    width: 4vw;

    margin-top: calc(50% - 4vw);
}

.promo-widget span {
    display: block;
    margin-top: 35%;
    font-size: 26px;
    font-style: italic;
}

@keyframes scaleIn {
    0% {
        transform: scale(1);
    }
    100% {
        transform: scale(1.1);
    }
}

@media only screen and (max-width: 900px) {

    .promo-widget-wrapper {
        height: 100vw;
    }

    .promo-widget {
        width: 48vw;
        height: 50vw;
    }

    .promo-widget img {
        height: 8vw;
        width: 8vw;
    
        margin-top: calc(50% - 8vw);
    }
}

@media only screen and (max-width: 630px) {

    .main-landing {
        height: 300px;
    }

    .landing-text {
        width: 300px;
        height: 100px;
    }

    .landing-book-promo {
        height: 740px;
    }

    .book-wrapper {
        width: 100%;
    }

    .book-features, .book-image {
        clear: both;
    }

    .book-image {
        height: 50%;
        margin-left: calc(50% - 100px);
        margin-bottom: 0px;
    }

    .book-features {
        height: calc(50% - 30px);
        width: 320px;
        margin-top: 0px;
        margin-left: calc(50% - 160px);
    }
    
}

@media only screen and (max-width: 500px) {

    .main-landing {
        background-size: 160%;
    }

    .promo-widget-wrapper {
        height: 400vw;
    }

    .promo-widget {
        width: 99vw;
        height: 100vw;
    }

    .promo-widget img {
        height: 16vw;
        width: 16vw;
    
        margin-top: calc(50% - 16vw);
    }

    .widget_headline h2 {
        font-size: 20px;
        font-weight: normal;
        line-height: 20px;
    }

    .widget_headline {
        height: 55px;
    }
}