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HTML

              
                <header class="c-header">
  <h1>Responsive Flexbox Article Listing</h1>
  <p>Flexbox is an amazingly powerful layout tool. In this example I have created a responsive grid of articles that increased the amount of visible articles on the page at larger resolutions.</p>
</header>
<section class="c-posts">
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Hydrogen stratosphere control tower capacitor Saturn Lalande 21185. Control tower x-rays Luhman 16 Banard's Star engine lunar. Horizon engine capture Pluto Brahe sun continuum ion-drive control tower Proxima Centauri space-time booster. Core horizon subspace Voyager coordinates water. Contractors Banard's Star nozzle time Orion weightless Gemini extra-vehicular explore.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Mars NASA subspace crew warp Herschel stratosphere. Saturn sky zero-g stratosphere fuel cell Venus grounded crew yaw Ptolemy Challenger. Pioneer stratosphere Cassini Lalande 21185 Earth telemetry. Galileo uranium jumpsuit warp Hawking.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Challenger Voyager Sirius capsule Pioneer Kepler hyperspace launch. Singularity extra-vehicular circumnavigate burst. Procyon fuel cell asteroid subspace uranium Proxima Centauri prototype capsule.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Capsule crew Discovery ice spacecraft Pioneer gravity Picard. Lithium contractors meteor water core saucer white hole stars planet Picard Jupiter Skunkworks. Prototype clusters Voyager cosmos zero-g Pluto Skunkworks hatch. Circumnavigate core hyperspace motion comet Ptolemy.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Orbit warp atomic Buzz Lightyear. Uranium circumnavigate Halley Neptune nebula launch north Proxima Centauri engine.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Troposphere capacitor Newton Kepler. Jupiter ionosphere saucer Gemini Neptune core Alpha Centauri Venus comet Proxima Centauri Herschel. Banard's Star inertia laser contractors ion-drive fuel cell NASA. Panel solar-flare dwarf probe Sagan Sirius jetpack time laser. Columbia nebula horizon mesoshphere pulsar mission nuclear Sirius jetpack UFO.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>X-rays Orion capsule re-entry Mercury tank capture Mars control tower. Fusion Challenger physics flight Saturn . Warp countdown flare telemetry yaw rocket stars. Planet astronomy Venus reusable continuum inertia robotic re-entry booster Pioneer.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Solar crew hydrogen booster panel Europa array Saturn fusion Jupiter control tower singularity. Telemetry laser Venus wave capacitor gamma ray orbit lunar Uranus. Venus supernova Hawking ignite Mars Kirk Pluto.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Dormant container star system subspace solar binary inverter hyperspace warp. Yaw LiDAR hydrogen container galaxy heliosphere Houston Skunkworks gravity weightless pulsar pitch. Stars volatile ice kryptonite extra-vehicular Cassini crew meteor Earth positron. Aurora singularity coordinates nozzle Skunkworks valve orbit Herschel.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Hubble nebula Europa Gemini Skunkworks subspace uranium extra-vehicular Galileo release planet Banard's Star. Pulsar stars Tyson prototype lunar explore Pioneer ion-drive mesoshphere.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
  <article class="c-posts__item">
    <h2>Article Title Here</h2>
    <p>Hydrogen stratosphere control tower capacitor Saturn Lalande 21185. Control tower x-rays Luhman 16 Banard's Star engine lunar. Horizon engine capture Pluto Brahe sun continuum ion-drive control tower Proxima Centauri space-time booster. Core horizon subspace Voyager coordinates water. Contractors Banard's Star nozzle time Orion weightless Gemini extra-vehicular explore.</p>
    <p><a href="#" class="c-btn">Read More</a></p>
  </article>
</section>
<footer class="c-footer">
  <p>Ipsum provided by <a href="http://interstellaripsum.com?ref=codepen?pen=wWWmNB" target="_blank">InterstellarIpsum.com</a></p>
</footer>
              
            
!

CSS

              
                .c-posts {
  display: flex;
  flex-wrap: wrap;
  align-items: top;
  padding: 5%;
  
  &__item {
    flex-grow: 1;
    padding-bottom: 2em;
    
    &:first-child {
      flex-grow: 2;
    }
  }
}

@media all and (min-width:600px) {
  .c-posts {
    &__item {
      flex-basis: 50%;
      padding-right: 5%;
      
      &:first-child {
        flex-basis: 100%;
      }
    }
  }
}

@media all and (min-width:1000px) {
  .c-posts {
    &__item {
      flex-basis: 33%;
      
      &:first-child {
        flex-basis: 66%;
      }
    }
  }
}

@media all and (min-width:1400px) {
  .c-posts {
    &__item {
      flex-basis: 25%;
      
      &:first-child {
        flex-basis: 50%;
      }
    }
  }
}

/* Other Non-Flexbox Related Styles */
.c-header,
.c-footer {
  background: #EDD382;
  text-align: center;
  padding: 2em;
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 1.4em;
  font-weight: 300;
  line-height: 1.6em;
  
  h1, h2, p {
    max-width: 40em;
    margin: 0 auto;
    
    &:not(:last-child) {
      margin-bottom: 1em;
    }
  }
  
  h1 {
    text-transform: uppercase;
    font-weight: 900;
  }
  
  a {
    color: #000;
  }
}

.c-footer {
  p {
    font-weight: 300;
  }
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Georgia', Times, serif;
  line-height: 1.6em;
  padding: 0;
  margin: 0;
}

h1 {
  font-size: calc(130% + 1vw);
  font-weight: normal;
}

h2 {
  font-size: 1.5em;
  font-weight: normal;
  margin-bottom: 0;
  margin-top: 0;
}

a {
  color: #0F5257;
}

.c-btn {
  color: #000;
  display: inline-block;
  border-bottom: 4px solid #000;
  text-decoration: none;
  text-transform: uppercase;
  font-family: 'Source Sans Pro', sans-serif;
  font-weight: 900;
  letter-spacing: .1em;
  padding: .3em 0;
  position: relative;
  transition: .2s all;
  
  &:before {
    content: '';
    position: absolute;
    bottom: 0;
    width: 100%;
    background: #FF521B;
    height: 0%;
    transition: .2s all;
    left: 0;
    z-index: -10;
  }
  
  &:hover {
    padding-left: .75em;
    padding-right: .75em;
    color: #fff;
    border-color: #FF521B;
    
    &:before {
      height: 100%;
    }
  }
}
              
            
!

JS

              
                
              
            
!
999px

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