.start-box {
    height: 500px;
    padding: 0;
}

#carouselExampleIndicators {
    height: 550px;
    overflow: hidden;
}

@media only screen and (min-width: 420px) {
    .clearfix {
        display: flex;
    }
}

@media only screen and (max-width: 420px) {
    .start-box {
        height: 200px;
        padding: 0;
    }

    #main-intro {
        padding: 0;
    }

    #carouselExampleIndicators {
        height: 350px;
    }
}