JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outline"></div>

<header>
  <nav>
    <a href="#">Пунк 1</a>
    <a href="#">Пунк 2</a>
    <a href="#">Пунк 3</a>
    <a href="#">Пунк 4</a>
    <a href="#">Пунк 5</a>
    <a href="#">Пунк 6</a>
  </nav>
</header>

CSS

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

header {
  min-width: 980px;
  margin: 0 auto;
  padding: 30px 0;

  background: #eee;
}

header:after {
  content: '';
  display: table;
  clear: both;
}

nav {
  float: right;

  padding: 22px 0;
  padding-right: calc(50% - 980px/2);
  /*padding-right: 50%;*/

  background: #d91d52;
}

a {
  margin-right: 35px;

  font-family: 'Open Sans', sans-serif;
  font-style: italic;
  text-decoration: none;
  text-transform: uppercase;

  color: #fff;
}

a:last-child {
  margin-right: 0;
}

.outline {
  position: absolute;
  top: 50%;
  left: 50%;

  transform: translate(-50%, -50%);

  width: 980px;
  height: calc(100% - 8px);
  border: 1px dashed;
}

@media screen and (max-width: 980px) {
  .outline {
    opacity: 0;
  }
}