Nav bar problem

HTML

<!DOCTYPE html>
<head>
    <title>Nav bar problem</title>
</head>

<body>
<nav>
    <div class="nav__logo">
        <a href="/" title="Start">
            <img src="">
        </a>
    </div>
    <div class="nav__bar">
        <ul class="bar__level1">
            <li><p>Start</p></li>
            <li><p>Item1</p></li>
            <li><p>Item2</p></li>
            <li><p>Item3</p></li>
            <li><p>Item4</p></li>
        </ul>
    </div>
</nav>
<main>

</main>
</body>

SCSS

body{
  margin: 20px 20px 0;
  nav {
    top: 0;
    background-color: #fff;
    padding: 10px 10px 0 0;
    display: flex;
    justify-content: space-between;
    width: 100%;
    position: fixed;
    z-index: 99;
    height: 80px;
    .nav__logo {
      width: 180px;
      padding: 10px 0;
      img {
        width: 100%;
      }
    }
    .nav__bar {
      display: flex;
      padding-right: 30px;
      padding-left: 0;
      justify-content: flex-end;
      align-items: center;
      flex: 1;
      li{
        margin: 0 20px;
      }
      .bar__level1 {
        display: inline-flex;
      }
    }
  }
}