html {
    font-size: 14px;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

html {
    position: relative;
    min-height: 100%;
    background: #f5f5f5;
}

body {
    margin-bottom: 60px;
    background: #f5f5f5;
}

nav {
    background-image: url("/images/top-bg.png");
    background-size: 100% 100%;
    background-repeat: no-repeat;
    min-height: 100px;
}

.logo {
    height: 70px;
}

.logo_font {
    font-size: 2em;
    color: #fff;
    padding: 0 1em;
    line-height: 70px;
}

.main_container {
    background: #f5f5f5;
}

.categories_container {
    text-align: center;
    background: #fff;
}

.categories_container .title {
    font-size: 20px;
    background: #2b87eb;
    color: #fff;
    height: 60px;
    line-height: 60px;
    padding: 0 20px;
}

.categories_item {
    display: block;
    height: 50px;
    line-height: 50px;
    background: none;
    color: #444;
    font-size: 18px;
    padding: 0;
    text-decoration: none;
}

.categories_item.selected {
    color: #2b87eb;
    transition: all .3s ease-in-out;
}

.articles_container {
    background: #fff;
    padding: 16px;
    min-height: 500px;
}

.articles_container .article_item {
    color: #2b87eb;
    text-decoration: auto;
    display: block;
    margin: 10px 0;
}

.article {
    background: #fff;
    padding: 16px;
}

.article_title {
    margin-bottom: 16px;
}

.article img {
    width: 100%;
}