CSS

* {
    padding: 0;
    margin: 0;
    font-family: sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.meadsos {
    padding: 5px 0;
    background-color: #2CDFA9;
}

.meadsos ul li {
    display: inline-block;
    color: #fff;
    margin-right: 10px;
}

.container {
    text-align: ce;
    align-self: start;
    width: 80%;
    margin: 0 auto;
}

header {
    border: 1px solid;
}

img {
    position: absolute;
    width: 70px;
}

header h1 {
    margin-left: 12%;
    border: 1px solid;
    float: left;
    padding: 15px 0;
    color: #2CDFA9;
}

header ul {
    border: 1px solid;
    float: right;
}

header ul li {
    display: inline-block;
}

header ul li a {
    padding: 25px 20px;
    display: inline-block;
}

header ul li a:hover {
    background-color: #2CDFA9;
    color: #fff;
}

.active {
    background-color: #2CDFA9;
    color: #fff;
}