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CSS

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HTML 

              
                <div class="container">
  <header role="banner">
    <h1>Brand Name</h1>
    <nav>
      <ul>
        <li><a href="#main">Home</a></li>
        <li><a href="/about">About</a></li>
        <li><a href="/products">Products</a></li> 
        <li><a href="/login">Login</a></li>
      </ul> 
    </nav> 
  </header>
  <main id="main">
    <h2>Content goes here</h2>
    
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur deserunt, suscipit velit itaque vitae necessitatibus, impedit pariatur eos. Pariatur beatae sed repellendus iusto doloribus quidem asperiores quia exercitationem sint dicta!</p>
    
  </main>
</div>
!

CSS 

              
                /* Defuault styles:
width: narrow,
orientation: portrait, 
update: slow,
scan: interlace,
monochrome: 1,
pointer: coarse, 
hover: none
*/

/* Creates large touch areas for finguers (coarse) */
li a {
  min-height: 4em;
}

/* Positions the navbar at the bottom for easy thumb access on small devices with portrait orientation */ 
h1, nav{
  position: fixed;
  left: 0;
  right: 0; 
}

/* Moves the main area to accomodate fixed header and navbar */
main {
  padding: 1em;
  padding-bottom: 5em;
  padding-top: 5em;
}

/* Mobile first: Accomodates the brand name on the left and the navigation on the right and it wraps without the need of width media queries */
header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

/* Center aligns the brand name */
h1 {
  display: flex;
  min-height: 2.5em;
  align-items: center;
  flex: 1 0 auto;
  padding-left: 1em;
  padding-right: 1em;
}

/* Flex items to make them streach */
nav {
  bottom: 0;
  display: flex;
  flex: 1 0 auto;
}

ul, li, li a {
 display: flex;
 flex: 1;
}

li a {
  flex: 1;
  align-items: center;
  justify-content: center;
  padding-left: 1em;
  padding-right: 1em;
  border-left: 1px solid black;
}

li:first-child a {
  border: none;
}

/* Detaches the fixed header and navbar for landscape viewports, fine pointers like a mouse and large screens */
@media (orientation: landscape), (pointer: fine), (min-width: 45em) {
  main {
    padding-bottom: 1em;
    padding-top: 1em;
  }
  h1, nav {
    position: static;
  }
}

/* Makes hit areas smaller for fine pointers like a mouse to gain viewport realestate */
@media (pointer: fine) {
  li a {
    min-height: 2.5em;
  }
}


/* Creates a vertical navigation on large landscape viewports */
  @media (orientation: landscape) and (min-width: 45em) {
  .container {
    display: flex;
  }

  header {
    display: block;
    flex: 0 0 20%;
  }
    
  header h1{
    min-height: 6em;
  }
    
  ul, li {
    display: block;
  }

  li a, li:first-child a {
    justify-content: start;
    border-left: 0;
    border-bottom: 1px solid black;
  } 
}

/* Adds an animation on devices that are capable to render animations smoothly. Filters devices like Kindles, TVs, touch devices */
@media (update: fast), (scan: progressive), (hover: hover) {
  li a {
    transition: all 0.3s ease-in-out;
  }
}

/* Removes underlines on links for color screens */
@media (color) {
  li a { text-decoration: none; }
}

/* Increases borders to 2px on interlace screens like plasma TVs */
@media (scan: interlace) {
    li a, li:first-child a {
    border-width: 2px;
  }
}

/* General make up: colors, fonts, etc */
html, body, .container { box-size: border-box; height: 100vh; }
body { font-family: sans-serif; line-height: 1.5; }
header { background: #393f44; border-top: 4px solid #00a8e1; color: white; }
nav { background: #292e34; }
h1 { background: #030303; font-weight: bold; }
li a { color: #ccc; }
li a:hover { background: #393f44; color: white }
h2, p { margin-bottom: 1em; }
h2 {font-weight: 700; }
!

JS
!
999px

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