body {
    background-color: #ccc;
}
.menu-wrapper {
    width: 960px;
    margin:  0 auto;
    padding: 25px;
    background-color: white;
}
h1,
h2,
h3 {
    font-weight: bold;
    margin: 10px 0;
}
h1 {
    font-size: 30px;
}
h2 {
    font-size: 25px;
}
h3 {
    font-size: 20px;
}
a {
    text-decoration: none;
}
ul {
    display: flex;
}
.one li,
.two li,
.three li,
.four li,
.eight li,
.nine li,
.ten li,
.eleven li {
    padding: 20px;
}
.one li,
.two li,
.three li,
.four li,
.five li,
.six li,
.eight li,
.nine li,
.ten li,
.eleven li {
    display: block;
}
.three a,
.four a,
.six a,
.seven a,
.eight a,
.nine a {
    color: white;
}
.one li {
    border-left: dotted 1px black;
}
.one li:first-child {
    border: none;
}
.one .active,
.two .active {
    font-weight: bold;
}
.two {
    border-top: solid 1px black;
    border-bottom: solid 1px black;
}
.three {
    background-color: green;
}
.three .active {
    background-color: rgba(255, 255, 255, .25);
}
.four {
    background-color: orange;
    border-top: solid 3px orange;
}
.four .active {
    background-color: #fff;
}
.four .active a {
    color: black;
}
.five {
    border-bottom: solid 3px grey;
}
.five li {
    background-color: black;
    padding: 10px 20px;
    border-radius: 5px 5px 0 0;
    margin: 0 2px;
}
.five a {
    color: lightgray;
}
.five .active {
    background-color: grey;
}
.six ul {
    gap: 10px;
}
.six li {
    background-color: red;
    padding: 10px 20px;
    border-radius: 15px;
}
.six .active {
    background-color: orange;
}
.seven ul {
    gap: 10px;
}
.seven li {
    background-color: red;
    width: 100px;
    height: 100px;
    border-radius: 50px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}
.seven .active {
    background-color: orange;
}
.eight {
    background-image: linear-gradient(greenyellow, green);
    border-radius: 10px;
}
.eight .active {
    background-color: rgba(255, 255, 255, .25);
}
.nine {
    border-radius: 10px;
    background: linear-gradient(to bottom, rgba(255,255,255,0) 0%,rgba(255,255,255,0.75) 50%,rgba(255,255,255,0) 51%,rgba(255,255,255,0) 100%);
    background-color: red;
}
.ten li {
    border-left: dotted 1px black;
    padding-left: 60px;
}
.ten li:nth-child(1) {
    border: none;
    background: url(../img/icon_home.png) 30px no-repeat;
}
.ten li:nth-child(2) {
    background: url(../img/icon_articles.png) 30px no-repeat;
}
.ten li:nth-child(3) {
    background: url(../img/icon_about.png) 30px no-repeat;
}
.ten li:nth-child(4) {
    background: url(../img/icon_contact.png) 30px no-repeat;
}
.eleven li {
    border-left: dotted 1px black;
}
.eleven li a {
    visibility: hidden;
}
.eleven li:nth-child(1) {
    border: none;
    background: url(../img/icon_home.png) center no-repeat;
}
.eleven li:nth-child(2) {
    background: url(../img/icon_articles.png) center no-repeat;
}
.eleven li:nth-child(3) {
    background: url(../img/icon_about.png) center no-repeat;
}
.eleven li:nth-child(4) {
    background: url(../img/icon_contact.png) center no-repeat;
}