JSFiddle - React, Tailwind, and code Playground

HTML

<header>
   <img src="http://design.ubuntu.com/wp-content/uploads/logo-ubuntu_su-white_orange-hex.png" alt="Logo">
    <nav>
        <a href="http://google.com">Odkaz</a>
        <a href="http://google.com">Odkaz</a>
        <a href="http://google.com">Odkaz</a>
        <a href="http://google.com">Odkaz</a>
    </nav>
    <div class="cleaner"></div>
</header>

CSS

body {
    background-color: #999999;
    font-family: Helvetica;
    margin: 0;
}

header {
    background-color: #000;
}

header img {
    float: left;
    max-height: 90px;
    margin-bottom: -40px;
}

header nav {
    float: left;
    padding: 10px;
}

header a {
    color: #fff;
    display: inline-block;
    font-size: 14px;
    line-height: 30px;
    text-decoration: none;
    text-transform: uppercase;
}

.cleaner {
    clear: both;
}