main {
    overflow: hidden;
    max-width: 100rem;
    margin: 0 auto;
}

section {
    padding: 2rem;
}

a:hover {
    text-decoration: underline;
}

.title {
    text-align: center;
}

/* Hidden only on visual browsers. */
.v_hidden {
    position:absolute;
    left:-10000px;
    top:auto;
    width:1px;
    height:1px;
    overflow:hidden;
}

.hidden {display: none;}

header {
    padding: .8rem;
    background-color: #ccc;
    margin-bottom: 3.2rem;
}

header nav {
    max-width: 100rem;
    margin: 0 auto;
}

.nav_title {
    float: left;
    font-size: 2.8rem;
    font-weight: 300;
}

.nav_menu {
    display: table-row;
    float: right;
    margin: 0;
}

.nav_menu li {
    display: table-cell;
    padding: 0 0 0 1rem;
    vertical-align: middle;
    list-style-type: none;
}

.nav_menu form, .nav_menu input {
    margin: 0;
}

#nav_search_btn {
    width: 3rem;
    opacity: .5;
}

#nav_qry_f {
    width: 20rem;
    margin: 0 .5rem;
    background-color: whitesmoke;
}

.breadcrumb {
    font-style: italic;
}

.breadcrumb.current {
    font-style: normal;
    font-weight: bold;
}

.title_icon {
    width: 5rem;
    margin: 0 .6rem 0 0;
    vertical-align: middle;
}

.body_icon {
    width: 2.5rem;
    margin: 0 .4rem 0 0;
    vertical-align: middle;
}

.slideshow li {
    list-style-type: none;
    display: inline-block;
    margin: 1rem 2rem;
    text-align: center;
    vertical-align: top;
}

.slideshow a {
    display: inline-block;
    text-align: left;
}

#result_list li {
    list-style-type: none;
    display: block;
    margin: 2rem auto;
}

#result_list li p {
    margin-bottom: 1rem;
}

.result_tn {
    margin-right: 1.5rem;
}

.res_md dt {
    padding: .25rem 1rem;
    background-color: #ccc;
    font-weight: bold;
    font-variant: small-caps;
    font-size: 1.6rem;
}

#res_children ol {
    list-style-type: none;
    display: block;
    margin: 2rem auto;
}

.toolbox {
    display: inline-block;
    float: right;
    margin: 4rem;
    border: .2rem solid #aaa;
    border-radius: .75rem;
    padding: 2rem;
}