(Bootstrap) Portfolio Screen Animations

index.php

<!--
Portfolio Screens are a name I use to designate image overlays
since I use them for my portfolio items most often. The screens
are much more involved than just using a slightly opaque background
cover since the wrappers include titles, descriptions, and buttons.
Upon hovering the portfolio screen, various inner elements slide
from divers directions to produce a subtle, but noticeable animated
effect. In order to prevent horizontal scroll bars on mobile devices,
I used media queries to change the horizontal slide features to
vertical.
-->

<!--Milton Law Firm Portfolio Screen-->
<div class="col-sm-6 text-center">
  <div class="panel panel-default">
    <div class="panel-body">
      <div class="portfolio_screen">
        <img src="img/mlf_portfolio_screen.png" class="img-responsive">
        <div class="portfolio_screen_caption">
          <div class="portfolio_screen_caption_content">
            <div class="portfolio_screen_name">
              <h3>Milton Law Firm</h3>
            </div>
            <div class="portfolio_screen_description">
              <p>Bootstrap Framework</p>
            </div>
            <div class="portfolio_screen_preview">
              <a href="http://musemetrics.org/MiltonLawFirm" target="_blank"><button class="btn btn-primary">Preview</button></a>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

style.css

/*
Portfolio Screens are a name I use to designate image overlays
since I use them for my portfolio items most often. The screens
are much more involved than just using a slightly opaque background
cover since the wrappers include titles, descriptions, and buttons.
Upon hovering the portfolio screen, various inner elements slide
from divers directions to produce a subtle, but noticeable animated
effect. In order to prevent horizontal scroll bars on mobile devices,
I used media queries to change the horizontal slide features to
vertical.
*/

/*Portfolio Screens*/
.portfolio_screen {
  display: block;
  position: relative;
  margin: 0 auto;
}
.portfolio_screen .portfolio_screen_caption {
  display: block;
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 100%;
  text-align: center;
  color: #fff;
  opacity: 0;
  background: rgba(144,178,215,.88);
}
.portfolio_screen .portfolio_screen_caption .portfolio_screen_caption_content {
  position: absolute;
  top: 50%;
  width: 100%;
  text-align: center;
  transform: translateY(-50%);
}
.portfolio_screen_name h3 {
  font-family: "Yesteryear", sans-serif;
  font-size: 2.55em;
  transform: translateX(-25px);
}
.portfolio_screen_description p {
  font-family: "Josefin Sans", sans-serif;
  font-size: 1.25em;
  padding: 0 40px;
  transform: translateX(25px);
}
.portfolio_screen:hover h3,
.portfolio_screen:focus h3 {
  transform: translateX(0px);
  transition-delay: 150ms;
}
.portfolio_screen:hover p,
.portfolio_screen:focus p {
  transform: translateX(0px);
  transition-delay: 150ms;
}
.portfolio_screen:hover .portfolio_screen_caption,
.portfolio_screen:focus .portfolio_screen_caption {
  opacity: 1;
}

/*Media Queries*/
@media (max-width: 768px) {

  .portfolio_screen_name h3 {
    font-family: "Yesteryear", sans-serif;
    font-size: 1.55em;
  }
  .portfolio_screen_description p {
    font-family: "Josefin Sans", sans-serif;
    font-size: 1.10em;
    padding: 0 40px;
  }
  .portfolio_screen_name h3 {
    font-family: "Yesteryear", sans-serif;
    font-size: 2.00em;
    transform: translateY(-25px);
  }
  .portfolio_screen_description p {
    font-family: "Josefin Sans", sans-serif;
    font-size: 1.25em;
    padding: 0 40px;
    transform: translateY(25px);
  }
  .portfolio_screen:hover h3,
  .portfolio_screen:focus h3 {
    transform: translateY(0px);
    transition-delay: 150ms;
  }
  .portfolio_screen:hover p,
  .portfolio_screen:focus p {
    transform: translateY(0px);
    transition-delay: 150ms;
  }
  .btn {
    font-size: 12px;
    padding: 3px 6px;
  }

}