<div class="header">
  <div class="header__inner">
      <img class="header__logo" src="https://placehold.jp/bbbbbb/ffffff/100x35.png?text=LOGO">
    <div class="header__navgroup">
      <div class="header__navitem">TOP</div>
      <div class="header__navitem">ABOUT</div>
      <div class="header__navitem">BLOG</div>
      <div class="header__navitem">CONTACT</div>
    </div>
  </div>
</div>
.header{
  margin-top: 20px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  background: #333;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.header__inner{
  max-width: 1152px;
  width: 90%;
  height: 100%;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
.header__logo{
  flex: none;
  width: auto;
  height: 35px;
}
.header__navgroup{
  margin-left: auto;
  display: flex;
  flex: none;
}
.header__navgroup > * + *{
  margin-left: 60px;
}
.header__navitem{
  font-size: 16px;
  color: #fff;
}

External CSS

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External JavaScript

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