@media only screen and (max-width: 600px) {
    #first-block {
        margin-top: 316px;
    }
    .image-block img {
        max-width: 100%;
        margin-left: 0px;
    }
    #second-block {
        margin-top: 0px;
        padding-top: 50px;
    }
    #second-block .small-line-green {
        margin-bottom: 50px;
    }
    .overview-block {
        margin-bottom: 25px;
    }
    #fourth-block h2 {
        margin-bottom: 25px;
    }
    .header-title {
        display: none;
    }
}

.navbar-collapse.show, .navbar-collapse.collapsing {
    width: 100%;
}
.navbar-collapse.show ul, .navbar-collapse.collapsing ul {
    width: 100%;
}