JSFiddle - React, Tailwind, and code Playground

HTML

<header>
    <div class="header__logo">
        <a href=""></a>
    </div>
    <nav>
        <ul>
            <li><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li><a href="#">three</a></li>
            <li><a href="#">four</a></li>
        </ul>
    </nav>
    <div class="search"></div>
</header>

SCSS

header {
  background: deepskyblue;
  display: flex;
  padding: 20px 0;
  .header__logo {
    background: aqua;
    flex: 20%;
    min-height: 140px;
  }
  nav {
    background: #111;
    flex: 78%;
    align-self: flex-end;
    ul {
      list-style: none;
      margin: 0;
      background: aquamarine;
      display: flex;
      justify-content: flex-end;
			align-items: flex-end;
    }
    a {
      text-decoration: none;
      display: block;
      padding: 1em;
      color: white;
    }
  }
  .search {
    background: #fff;
    flex: 12%;
  }
}