body {
    background-color: #ccc;
}
.page-wrapper {
    width: 1080px;
    margin: 50px auto;
    padding: 50px;
    background-color: white;
}
h1 {
    font-size: 50px;
    margin-top: 50px;
}
h2 {
    font-size: 25px;
}
h3 {
    margin-top: 10px;
    margin-bottom: 50px;
}
h1,
h2 {
    font-weight: bold;
    text-transform: uppercase;
}
h1,
h3 {
    text-align: center;
}
.menu {
    margin: 50px 0;
}
a {
    text-decoration: none;
    font-size: 20px;
    text-transform: uppercase;
}
ul {
    display: flex;
    justify-content: center;
}

.one a,
.two a,
.three a,
.four a,
.five a,
.six a,
.seven a,
.eight a,
.nine a,
.ten a,
.eleven a {
    display: block;
}
.one a,
.two a,
.three a,
.five a,
.six a,
.seven a,
.eight a,
.nine a,
.ten a,
.eleven a {
    padding: 20px 30px;
}
.one a,
.two a,
.three a,
.four a,
.five a,
.seven a,
.eleven a {
    color: white;
}
.one ul,
.two ul,
.three ul,
.seven ul,
.eleven ul {
    background-color: orange;
}

.one li {
    border-left: solid rgba(255, 255, 255, .5) 1px;
}
.one li:last-child {
    border-right: solid rgba(255, 255, 255, .5) 1px;
}
.one .active {
    background-color: rgba(0, 0, 0, .1);
}

.two li {
    position: relative;
}
.two li:nth-child(even) {
    background-color: rgba(0,0,0, .1);
}
.two li:nth-child(even)::before,
.two li:nth-child(odd)::before {
    content: "";
    display: block;
    width: 30px;
    height: 100%;
    position: absolute;
    top: 0;
    z-index: 1;
    clip-path: polygon(0 0, 0 100%, 100% 100%);
}
.two li:nth-child(even)::before {
    background-color: rgba(0,0,0, .1);
    right: -30px;
}
.two li:nth-child(odd)::before {
    background-color: orange;
    right: -30px;
}
.two a{
    padding-left: 60px;
}

.three li {
    position: relative;
}
.three li:nth-child(even) {
    background-color: rgba(0,0,0, .1);
}
.three li:nth-child(even)::before,
.three li:nth-child(odd)::before {
    content: "";
    display: block;
    width: 30px;
    height: 100%;
    position: absolute;
    top: 0;
    z-index: 1;
    clip-path: polygon(0 0, 0 100%, 50% 50%);
}
.three li:nth-child(even)::before {
    background-color: rgba(0,0,0, .1);
    right: -30px;
}
.three li:nth-child(odd)::before {
    background-color: orange;
    right: -30px;
}
.three a {
    padding-left: 40px;
}

.four li,
.four a {
    border-radius: 17px;
    background-color: orange;
}
.four ul {
    gap: 10px;
}
.four a {
    background-color: rgba(0, 0, 0, .1);
    padding: 5px 25px;
}
.four .active a {
    background-color: orange;
}

.five li,
.five a {
    border-radius: 17px 17px 0 0;
    background-color: orange;
}
.five a {
    background-color: rgba(0, 0, 0, .1);
}
.five ul {
    gap: 10px;
    border-bottom: solid 5px orange;
}
.five .active a {
    background-color: orange;
}

.six ul {
    border-bottom: solid 5px orange;
}
.six .active a {
    background-color: orange;
    color: white;
}

.seven ul {
    border-top: solid 3px orange;
}
.seven .active a {
    background-color: white;
    color: black;
}

.eight ul {
    border-bottom: solid 1px orange;
}
.eight a {
    color: orange;
    position: relative;
}
.eight .active a::after {
    content: "";
    display: block;
    border-bottom: solid 9px orange;
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 100%;
}

.nine ul {
    border-top: solid 1px grey;
    border-bottom: solid 1px grey;
}
.nine a {
    color: grey;
}
.nine .active a{
    position: relative;
}
.nine .active a::before,
.nine .active a::after {
    content: "";
    display: block;
    width: 15px;
    height: 15px;
    position: absolute;
    top: 38%;
    z-index: 1;
    background-color: gray;
}
.nine .active a::before {
    left: 0;
    clip-path: polygon(0 0, 0 100%, 87% 50%);
}
.nine .active a::after {
    right: 0;
    clip-path: polygon(100% 0, 100% 100%, 13% 50%);
}

.ten ul {
    border-bottom: solid 1px black;
}
.ten li {
    position: relative;
}
.ten .active a {
    position: relative;
}
.ten li::before,
.ten .active a::before {
    content: "";
    display: block;
    position: absolute;
}
.ten li::before {
    width: 25px;
    height: 25px;
    left: 0;
    top: 29%; 
}
.ten .active a::before {
    width: 15px;
    height: 15px;
    bottom: 0;
    left: 43%;
    clip-path: polygon(100% 100%, 0 100%, 50% 13%);
    background-color: black;
    z-index: 2;
}
.ten li:nth-child(1)::before {
    background-image: url(../img/ic_home_black_24px.svg);
    z-index: 1;
}
.ten li:nth-child(2)::before {
    background-image: url(../img/ic_local_library_black_24px.svg);
    z-index: 1;
}
.ten li:nth-child(3)::before {
    background-image: url(../img/ic_account_circle_black_24px.svg);
    z-index: 1;
}
.ten li:nth-child(4)::before {
    background-image: url(../img/ic_mail_black_24px.svg);
    z-index: 1;
}

.eleven a {
    padding: 20px 50px;
}
.eleven li {
    position: relative;
}
.eleven li::before,
.eleven li::after {
    content: "";
    display: block;
    position: absolute;
}
.eleven li::after {
    left: 4px;
    top: 19%;
    width: 35px;
    height: 35px;
    clip-path: circle(50% at 50% 50%);
    background-color: white;
    z-index: 1;
}
.eleven li:nth-child(1)::before,
.eleven li:nth-child(2)::before,
.eleven li:nth-child(3)::before,
.eleven li:nth-child(4)::before {
    width: 25px;
    height: 25px;
    left: 10px;
    top: 29%; }
.eleven li:nth-child(1)::before {
    background-image: url(../img/ic_home_black_24px.svg);
    z-index: 2;
}
.eleven li:nth-child(2)::before {
    background-image: url(../img/ic_local_library_black_24px.svg);
    z-index: 2;
}
.eleven li:nth-child(3)::before {
    background-image: url(../img/ic_account_circle_black_24px.svg);
    z-index: 2;
}
.eleven li:nth-child(4)::before {
    background-image: url(../img/ic_mail_black_24px.svg);
    z-index: 2;
}
.eleven .active {
    background-color: rgba(0, 0, 0, .1);
}