header {
      width: 100%;
      height: 0vh;
      background-size: cover;
}
.logo {
      line-height: 60px;
      position: fixed;
      float: left;
      margin: 16px 46px;
      color: #fff;
      font-weight: bold;
      font-size: 20px;
      letter-spacing: 2px;
}

nav {
      position: fixed;
      width: 100%;
      line-height: 60px;
      z-index: 100;
}

nav ul {
      line-height: 60px;
      list-style: none;
      background: #000000;
      overflow: hidden;
      color: #fff;
      padding: 0;
      text-align: right;
      margin: 0;
      padding-right: 40px;
      transition: 1s;
}

nav.black ul {
    background-color: #000000;
}

nav ul li {
      display: inline-block;
      padding: 16px 20px;;
}

nav ul li a {
      text-decoration: none;
      color: #fff;
      font-size: 16px;
      font-weight: bold;
}
nav ul li a:hover {
      text-decoration: none;
      color: #fff;
}
.menu-icon {
      line-height: 60px;
      width: 100%;
      background-color:  #000000;
      text-align: right;
      box-sizing: border-box;
      padding: 15px 24px;
      cursor: pointer;
      color: #fff;
      display: none;
}

@media only screen and (max-width: 925px) {
 nav ul li {
    display: inline-block;
    padding: 25px 10px;
}
}

@media(max-width: 786px) {

      .logo {
            position: fixed;
            top: 0;
            margin-top: 6px;
      }

      nav ul {
            max-height: 0px;
          background-color: #000000e0;
      }

      nav.black ul {
            background-color: #000000e0;
      }

      .showing {
            max-height: 34em;
      }

      nav ul li {
            box-sizing: border-box;
            width: 100%;
            margin: -25px;
            text-align: center;
      }

      .menu-icon {
            display: block;
      }

}