* {
    margin: 0;
    padding: 0;
}
header {
    background-color: #CFE;
}
.site-cont {
    padding: 20px;
    text-align: center;
}
nav {
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    padding-right: 50px;
    background-color: aquamarine;
}
nav a {
    padding: 15px;
    color: indigo;
    text-decoration: none;
    font-weight: bold;
}
nav a:hover {
    background-color: cadetblue;
    color: white;
    box-shadow: 0 5px indigo;
}
.nav-active {
    background-color: #DCADFF;
    box-shadow: 0 5px indigo;
}
#main-contents {
    display: flex;
    flex-direction: row;
}
section {
    margin: 20px;
    padding: 10px;
}
aside {
    width: 40%;
    height: 100%;
    min-width: 90px;
    margin: 20px 30px 20px 20px;
    padding: 20px;
    background-color: cadetblue;
}
aside ul {
    text-indent: 15%;
    list-style-type: none;
}
aside li {
    margin: 5px;
}
aside ul ul {
    text-indent: 30%;
}
aside a {
    text-underline-offset: 3px;
    color: darkblue;
}
aside a:hover {
    color: aliceblue;
    text-decoration-style: dotted;
}
.aside-active {
    text-decoration-style: double;
    font-weight: bold;
    color: brown;
}
#breadcrumb {
    margin: 10px;
}
#breadcrumb a {
    color: #5D0001;
    text-decoration: none;
}
#breadcrumb a:hover {
    color: blueviolet;
}

/* skip link */
.skipl {
	clip: rect(0 0 0 0);
	height: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute;
	white-space: nowrap;
	width: 1px;
}
.skipl:focus {
	clip: auto;
	height: auto;
	margin: 0;
	overflow: visible;
	position: absolute;
	width: auto;
	outline: none;
	top: 15px;
	left: 20px;
	color: var(--alink-color);
	font-size: 1.1em;
    text-decoration: underline;
    font-weight: normal;
}

@media only screen and (max-width: 880px) {
    nav {
        padding-right: 0;
        justify-content: center;
    }
    aside {
        margin: 20px 15px 10px 10px;
        padding: 10px;
    }
    section {
        margin: 10px;
        padding: 5px;
    }
}