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CSS

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

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HTML

            
              <header id="site-header">
  <h1>Adam Dehnel</h1>
  <div>father, developer, cook and woodworker</div>
</header>
<nav class="nav-main">
  <a href="#home" class="home" data-section-id="home">
    Home
  </a>
  <a href="#web" class="web active" data-section-id="web">
    Web
  </a>
  <a href="#food" class="food" data-section-id="food">
    Food 
  </a> 
  <a href="#wood" class="wood" data-section-id="wood">
    Wood
  </a>
  <a href="#about" class="about" data-section-id="about"> 
    About 
  </a>
  <a href="#secured" class="secured" data-section-id="secured">
    Secured
  </a>
</nav>
<main class="web nav-sub-exists">
  <nav class="nav-sub">
    <a href="#">Something else</a><a href="#">Something  else</a><a href="#">Something else</a><a href="#">Something else</a><a href="#" class="nav-sub-pull">&#9655;</a>
  </nav>
  <div class="content grid">
    <section class="blog col-2-3">
      <article class="entry">
        <h1>Developing My First Responsive Site</h1>
        <p>Below is the story of me developing my first fully-responsive site (this one).  All the learnings, trials and general thoughts regarding it.</p>
        <h2>Starting From Scratch</h4>
        <p>I started from scratch. Not just where you have some guides but no colors or something &mdash; completely from scratch.</p> 
      <nav class="nav-blog cf">
        <a href="#">&larr; Previous Entry<span>(Becoming a Front-End Developer)</span></a>
        <a href="#">Blog Archives</a>
        <a href="#">Next Entry &rarr;</a>
      </nav>
    </section>
    <aside class="col-1-3 social-media social-media-github">
      <header>
        <a href="#" class="cf">
          <h2 class="social-site">www.twitter.com</h2>
          <img src="https://g.twimg.com/Twitter_logo_blue.png" />
          <span class="social-username">@arsdehnel_wdwrk</span>
        </a>
      </header>
      <article class="entry">
        <h3 class="entry-label">12/01/13 12:17PM</h3>
        <div class="entry-content">apple dumplings, biscuits and homemade gravy.  all before 9 am. 
  #winning</div>
      </article>
      <article class="entry">
        <h3 class="entry-label">11/29/13 4:45AM</h3>
        <div class="entry-content">apple dumplings, biscuits and homemade gravy.  all before 9 am. 
  #winning</div>
      </article>
      <article class="entry entry-more">
        <a href="#">more&rarr;</a>
      </article>
      <header>
        <a href="#" class="cf">
          <h2 class="social-site">www.github.com</h2>
          <img src="http://www.iconsdb.com/icons/preview/caribbean-blue/github-11-xxl.png" />
          <span class="social-username">arsdehnel</span>
        </a>
      </header>
      <article class="entry">
        <h3 class="entry-label">arsdehnel.net</h3>
        <div class="entry-content">the repo for this site</div>
      </article>
    </aside>
  </div>
</main>
<link href='https://fonts.googleapis.com/css?family=Montserrat+Subrayada:400,700' rel='stylesheet' type='text/css'>
!

CSS

            
              @import "compass/css3";

@mixin breakpoint($point) {
  @if $point == papa-bear {
    @media (min-width: 1150px) { @content; }
  }
  @else if $point == mama-bear {
    @media (min-width: 600px) { @content; }
  }
  @else if $point == baby-bear {
    @media (max-width: 599px)  { @content; }
  }
}

/* ---------------------------------------------
     variables
--------------------------------------------- */
$home_color:    #a2450d; 
$web_color:     #4e033b; 
$food_color:    #328b0c;
$wood_color:    #692a04;
$about_color:   #11386a;
$secured_color: #555555;


/* --------------------------------------------- 
     reset/setup
--------------------------------------------- */
*, *::after, *::before {
  box-sizing: border-box;
}

/* --------------------------------------------- 
     main layout
--------------------------------------------- */
body{ 
  padding: 0;
  margin: 0;
  font-family: arial; 
  background: slategrey;
  @include breakpoint(mama-bear) { padding: 5px 20px; }
}
main { 
  background: white;
	display: block;
	padding: 1em;
  position: relative;
  top: 40px;
  @include breakpoint( mama-bear ){
  	margin: -8px -10px 10px -15px;
  	border-radius: 3px;
    border: 3px solid white;
  }
  &.home{
    box-shadow: inset 0 0 8px $home_color;
    background: tint( $home_color, 90% );
  }
  &.web{
    box-shadow: inset 0 0 8px $web_color;
    background: tint( $web_color, 90% );
  } 
  &.food{
    box-shadow: inset 0 0 8px $food_color;
    background: tint( $food_color, 90% );
  }
  &.wood{
    box-shadow: inset 0 0 8px $wood_color;
    background: tint( $wood_color, 90% ); 
  }
  &.about{
    box-shadow: inset 0 0 8px $about_color;
    background: tint( $about_color, 90% );
  }
  &.secured{
    box-shadow: inset 0 0 8px $secured_color;
    background: tint( $secured_color, 90% );
  }
}

/* ---------------------------------------------
     header
--------------------------------------------- */
#site-header{
  color: #444;
  margin: 0;
  position: relative;
  padding: 4px;
  width: 90%;
  float: right;
  padding: 4px 0 18px;
  border-radius: 6px;
  z-index: 0;
  white-space: nowrap;
  *{
    display: inline-block;
    padding: 8px 4px 0;
    @include breakpoint( mama-bear ){
      padding: 6px 3px 0;
    }
    @include breakpoint( papa-bear ){
      padding: 0 6px 0 22px;
    }
  }
  &::before{
    content: ''; // To generate the box 
    position: absolute;
    top: 6px; 
    right: -20px; 
    bottom: 12px; 
    left: 0;
    z-index: -1;
    border-bottom: none;
    border-radius: 10px 0 0 10px;
    box-shadow: 0 2px hsla(0,0%,100%,.5) inset;
    transform: translateZ(0) perspective(40px) rotateX(-2deg);
    transform-origin: bottom right;
    background: lightblue;
  }
  &::after{
    content: ' ';
    display: table;
    clear: both;
  }
  @include breakpoint( papa-bear ){ 
    width: 50%;
    *{ 
      display: block;
    }
  }
  h1{
    margin: 0;
    font-family: "Montserrat Subrayada", arial, sans-serif;
    color: black;
    text-decoration: none;
    font-size: 13px;
    @include breakpoint( mama-bear ){ 
      font-size: 28px;
    }
    @include breakpoint( papa-bear ){ 
      font-size: 36px;
    }    
  }
  div{
    font-size: 10px;
    @include breakpoint( mama-bear ){
      font-size: 13px;
    }
  }
}


/* ---------------------------------------------
     navigation

     originated from http://lea.verou.me/2013/10/slanted-tabs-with-css-3d-transforms/
--------------------------------------------- */
.nav-main {
  overflow: hidden;
  position: relative;
  min-height: 25px;
  top: 43px;
  white-space: nowrap;
  z-index: 1;
  overflow: visible;
  &::after { 
    content: "☰"; /* "Three Line Menu Navicon" shows up */
    position: absolute;
    top: 1px;
    right: 10px;
    z-index: 2;
    pointer-events: none;
    color: white;
    @include breakpoint( mama-bear ){
      display: none;
    }
  }
  a {
    display: block;
    font-family: "Montserrat Subrayada", arial, sans-serif;
    color: #444;
    text-decoration: none; 
    position: absolute; 
    top: 0;
    left: 0;
    width: 100%;
    height: 25px;
    line-height: 23px;
    padding: 2px 3px 0;
    background: linear-gradient( #ccc, #999 );
    font-weight: 400;
    font-size: 17px;
    @include breakpoint( mama-bear ){
      display: inline-block;
      position: relative;
      margin: 0 -7px;
      padding: 1.5em 2em 1em 1em;
      width: auto;
      background: none;
      height: auto;
      &::before{
        transition: all .2s linear;
        border: .1em solid #aaa;
      }
      &.home{
        &:hover::before{
          background: tint($home_color,40%);
        }
        &::before{
          background: tint($home_color,70%);
        }
      }
      &.web{
        &:hover::before{
          background: tint($web_color,40%);
        }
        &::before{
          background: tint($web_color,70%);
        }
      }
      &.food{
        &:hover::before{
          background: tint($food_color,40%);
        }
        &::before{
          background: tint($food_color,70%);
        }
      }
      &.wood{
        &:hover::before{
          background: tint($wood_color,40%);
        }
        &::before{
          background: tint($wood_color,70%);
        }
      } 
      &.about{
        &:hover::before{
          background: tint($about_color,40%);
        }
        &::before{
          background: tint($about_color,70%);
        }
      }
      &.secured{
        &:hover::before{
          background: tint($secured_color,40%);
        }
        &::before{
          background: tint($secured_color,70%);
        }
      }
      &::before{
        content: ''; // To generate the box 
        position: absolute;
        top: 0; right: 0; bottom: .5em; left: 0;
        z-index: -1;
        border-bottom: none;
        border-radius: 10px 10px 0 0;
        box-shadow: 0 2px hsla(0,0%,100%,.5) inset;
        transform: translateZ(0) perspective(5px) rotateX(2deg);
        transform-origin: bottom left;
      }
      &.active{
        z-index: 2;
        color: white;
        text-shadow: 0 0 4px #555;
        &::before {
          margin-bottom: -1px;
          border-top-width: 1px;
          border-bottom: 0;
        }
        &.home::before{
          background: $home_color;
        }
        &.web::before{
          background: $web_color;
        }
        &.food::before{ 
          background: $food_color;
        }
        &.wood::before{
          background: $wood_color;
        } 
        &.about::before{
          background: $about_color;
        }
        &.secured::before{
          background: $secured_color;
        }
      }
    }
    &.active {
      border: 0;
      z-index: 1; /* Active tab is on top */
      color: white;
      @include breakpoint( baby-bear ){
        &.home{
          background: $home_color;
        }
        &.web{
          background: $web_color;
        }
        &.food{ 
          background: $food_color;
        }
        &.wood{
          background: $wood_color;
        } 
        &.about{
          background: $about_color;
        }
        &.secured{
          background: $secured_color;
        }
      }
    }    
  }//a
  @include breakpoint( baby-bear ){
    &.open {
      a {
        position: relative;
        display: block;
      }
    }
  }
} 
/* --------------------------------------------- 
     sub navigation
--------------------------------------------- */
.nav-sub{
  display: block;
  vertical-align: top;
  width: 140px;
  position: absolute;
  top: 0; 
  left: 0; 
  bottom: 0;
  border-top: 1px solid grey;
  .home &{
    background: $home_color;
  }
  .web &{
    background: $web_color;
  }
  .food &{
    background: $food_color;
  }
  .wood &{
    background: $wood_color;
  }
  .about &{
    background: $about_color;
  }
  .secured &{
    background: $secured_color;
  }
  a{
    display: block;
    padding: 8px 0 8px 8px;
    font-size: .9em;
    color: #ddd;
    text-decoration: none;
    border-bottom: 1px solid grey;
    @include transition( .2s all linear );
    &:hover{
      .home &{
        background: tint( $home_color, 30% );
      }
      .web &{
        background: tint( $web_color, 30% );
      }
      .food &{
        background: tint( $food_color, 30% );
      }
      .wood &{
        background: tint( $wood_color, 30% );
      }
      .about &{
        background: tint( $about_color, 30% );
      }
      .secured &{
        background: tint( $secured_color, 30% );
      }
    }
  }
  .nav-sub-pull{
    display: none;
  }
  @include breakpoint( baby-bear ){
    left: -140px;
    @include transition( .5s all linear ); 
    &.open{
      left: 0;
    }
    .nav-sub-pull{
      display: block;
      position: absolute;
      width: 20px;
      bottom: 0;
      top: 0; 
      left: 140px;
      border: 0;
      background: black;
      font-size: 12px;
      padding: 8px 0 8px 4px;
    }
  }
}
/* --------------------------------------------- 
     social media
--------------------------------------------- */
.social-media{
  background: lightgrey;
  color: black;
  overflow-x: hidden;
  header {
    a{
      border-bottom: 1px solid darkgrey;
      padding: 8px 8px 8px 8px;
      text-decoration: none;
      display: block;
      @include transition( .2s all linear );
      &:hover{
        background: white;
      }
    }
    img{
      height: 20px;
      float: left;
    }
    .social-site{
      font-size: 11px;
      text-align: center;
      letter-spacing: .1em;
      padding: 0;
      margin: 0 0 3px;
      text-transform: uppercase;
    }  
    .social-username{
      float: right;
      font-size: .8em;
      margin-top: 5px;
    }
  }
  &.social-media-twitter {
    box-shadow: 0 0 8px 1px #55acee;
    header a{
      color: #55acee;
    }
  }
  &.social-media-github{
    box-shadow: 0 0 8px 1px #4183c4;
    header a{
      color: #4183c4;
    }
  }
  .entry{
    border-bottom: 1px solid black;
    &:last-of-type{
      border-bottom: none;
    }
    .entry-label{
      font-size: .9em;
      color: #555;
      padding: 0;
      margin: 3px;
    }
    .entry-content{
      padding: 0 8px 8px; 
      font-size: .8em;
      color: #666;
    }
    &.entry-more a{
      display: block;
      text-align: center;
      padding: 3px;
      text-transform: uppercase;
      letter-spacing: .2em;
      font-size: .7em;
      background: grey;
      text-decoration: none;
      color: white;
      &:hover{
        background: black;
      }
    }
  }
}
/* --------------------------------------------- 
     blog
--------------------------------------------- */
.blog{
  .nav-blog{
    margin: 20px 0 0;
    border-top: 2px solid grey;
    padding: 4px;
    a{
      display: table-cell;
      float: left;
      width: 33.33%;
      color: black;
      font-size: .9em;
      text-align: center;
      height: 40px;
      vertical-align: middle;
      span{
        display: block;
        text-decoration: none;
        color: #666;
      }
    }
    a:first-child{
      text-align: right;
    }
    a:last-child{
      text-align: left;
    }
  }
  article{
    h1{
      font-family: "Montserrat Subrayada", arial, sans-serif;
      margin: 0;
      font-size: 1.5em;
      .home &{
        color: $home_color;
        text-shadow: 2px 2px 3px tint( $home_color, 70% );
      }
      .web &{
        color: $web_color;
        text-shadow: 2px 2px 3px tint( $web_color, 70% );
      }
      .food &{
        color: $food_color;
        text-shadow: 2px 2px 3px tint( $food_color, 70% );
      }
      .wood &{
        color: $wood_color;
        text-shadow: 2px 2px 3px tint( $wood_color, 70% );
      }
      .about &{
        color: $about_color;
        text-shadow: 2px 2px 3px tint( $about_color, 70% );
      }
    }
    h2{
      font-size: 18px;
      padding: 0;
      margin: 20px 0 0;
      .home &{
        color: $home_color;
      }
      .web &{
        color: $web_color;
      }
      .food &{
        color: $food_color;
      }
      .wood &{
        color: $wood_color;
      }
      .about &{
        color: $about_color;
      }
    }
    p{
      margin: 8px;
      font-size: .9em;
      &:first-of-type{
        margin-top: 15px;
      }
    }
    
  }
}

/* --------------------------------------------- 
     content
--------------------------------------------- */
.content{
  display: block;
  min-height: 200px;
  .nav-sub-exists &{
    margin-left: 130px;
    @include breakpoint( baby-bear ){
      margin-left: 20px;
    }
  }
}

/* --------------------------------------------- 
     grid
--------------------------------------------- */
.grid{
  [class*='col-'] {
    float: left;
  }
  .col-2-3{
    width: 66.66%;
  }
  .col-1-3 {
    width: 33.33%;
  }
  &::after {
    content: "";
    display: table;
    clear: both;
  }
  [class*='col-'] {
    padding-right: 20px;
  }
  [class*='col-']:last-child {
    padding-right: 0;
  }  
}

/* --------------------------------------------- 
     utilities
--------------------------------------------- */
.hide{
  display: none;
}
.cf:before,
.cf:after {
    content: " ";
    display: table;
}
.cf:after {
    clear: both;
}
!

JS

            
              var Tabs = {

  init: function() {
    this.bindUIfunctions();
    this.pageLoadCorrectTab();
  },

  bindUIfunctions: function() {

    // Delegation
    $(document)
      .on("click", ".nav-main a[href^='#']:not('.active')", function(event) {
        Tabs.changeTab(this.hash);
        event.preventDefault();
      })
      .on("click", ".nav-main a.active", function(event) {
        Tabs.toggleMobileMenu(event, this);
        event.preventDefault();
      })
      .on("click", ".nav-sub a.nav-sub-pull", function(event) {
        Tabs.toggleSubnavDrawer(event, this);
        event.preventDefault();
      });

  },

  changeTab: function(hash) {

    var anchor = $("[href=" + hash + "]");
    var div = $(hash);
    var main  = $('main');

    // activate correct anchor (visually)
    anchor.addClass("active").siblings("a").removeClass("active");

    // activate correct div (visually)
    div.addClass("active").siblings().removeClass("active");

    // update URL, no history addition
    // You'd have this active in a real situation, but it causes issues in an <iframe> (like here on CodePen) in Firefox. So commenting out.
    // window.history.replaceState("", "", hash);

    // Close menu, in case mobile
    anchor.closest(".nav-main").removeClass("open");
    
    //adjust main class
    main.removeClass(main.attr('data-active-section-id')).addClass(anchor.data('section-id')).attr('data-active-section-id',anchor.data('section-id'));
    

  },

  // If the page has a hash on load, go to that tab
  pageLoadCorrectTab: function() {
    this.changeTab(document.location.hash);
  },

  toggleMobileMenu: function(event, el) {
    $(el).closest(".nav-main").toggleClass("open");
  },
   
  toggleSubnavDrawer: function( event, el ){
    $(el).closest(".nav-sub").toggleClass("open");
  }

}

Tabs.init();
!
999px

Console