I want to center the text in my top navigation below vertically. I tried to give my .header a height:3em; and use vertical-align:middle; but then my responsive fold-out menu can't handle the fixed height. The menu doesnt appear anymore because the height is fixed now. I also tried with .parent padding:50% 0; and .child margin:0 auto; but I don't get the trick. I also tried to use line-height:40px and it looks ok - but my burger-menu-icon won't center this way. My burger-menu-icon also has problems when using % and translate, i can center it this way - but with fold-out menu it's also moving to the 50% and that's not wanted. Changing to fixed/absolute will crash the % and translate...
html {
  font-size: calc(1.3em + 1vw)
}
body {
  margin: 0;
  font-family: Helvetica, sans-serif;
  background-color: #fafafa;
}
/* header */
.header {
  position: fixed;
  overflow: auto;
  width: 100%;
  max-width: 30em;
 margin-left: auto;
 margin-right: auto;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 1px 2px rgba(0, 0, 0, .24);
  background: #ffb347;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #ffb347, #ffcc33);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #ffb347, #ffcc33); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */ 
}
.header ul {
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
}
.header li a {
  display: block;
  padding: 15px 20px;
  text-decoration: none;
  font-size: 0.7em;
  color: #000;
  background-color: blue;
}
.header li a:hover,
.header .menu-btn:hover {
  background-color: blue;
}
.header .logo {
  display: block;
  float: left;
  font-size: 1.3em;
  padding: 15px 20px;
  text-decoration: none;
  color: #000;
  background-color: blue;
}
.header .logo:hover {
}
/* menu */
.header .menu {
  clear: both;
  max-height: 0;
  transition: max-height .2s ease-out;
}
/* menu icon */
.header .menu-icon {
  cursor: pointer;
  display: inline-block;
  float: right;
  display:table-cell;
  vertical-align:middle;
  text-align:center;
  padding: 0.9em 0.4em;
  user-select: none;
  background: blue; 
}
.header .menu-icon .navicon {
  background: #333;
  display: block;
  height: 7px;
  position: relative;
  transition: background .2s ease-out;
  width: 40px;
}
.header .menu-icon .navicon:before,
.header .menu-icon .navicon:after {
  background: #333;
  content: '';
  display: block;
  height: 100%;
  position: absolute;
  transition: all .2s ease-out;
  width: 100%;
}
.header .menu-icon .navicon:before {
  top: 15px;
}
.header .menu-icon .navicon:after {
  top: -15px;
}
/* menu btn */
.header .menu-btn {
  display: none;
}
.header .menu-btn:checked ~ .menu {
  max-height: 100%;
}
.header .menu-btn:checked ~ .menu-icon .navicon {
  background: transparent;
}
.header .menu-btn:checked ~ .menu-icon .navicon:before {
  transform: rotate(-45deg);
}
.header .menu-btn:checked ~ .menu-icon .navicon:after {
  transform: rotate(45deg);
}
.header .menu-btn:checked ~ .menu-icon:not(.steps) .navicon:before,
.header .menu-btn:checked ~ .menu-icon:not(.steps) .navicon:after {
  top: 0;
}
@media (min-width: 920px) {
  .header {
    position: relative;
  }
  .header li {
    float: left;   
  }
  .header li a {
  }
  .header .menu {
    clear: none;
    float: right;
    max-height: none;
  }
  .header .menu-icon {
    display: none;
  }
}<div class="header">
    <a href="" class="logo">LOREM <b>IPSUM</b></a>
    <input class="menu-btn" type="checkbox" id="menu-btn" />
    <label class="menu-icon" for="menu-btn"><span class="navicon"></span></label>
    <ul class="menu">
      <li><a href="#work"> <b>Lorem</b></a></li>
      <li><a href="#about"><b>Ipsum</b></a></li>
      <li><a href="#careers"><b>Dolor</b></a></li>
      <li><a href="#contact"><b>Sit</b></a></li>
    </ul>
  </div>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>
<br><br><br>Start it in Full-Page!
 
     
     
    