jsbin.com 'Welcome' CSS

body {
  padding: 0;
  margin: 0;

  background: #3FA8C6;
  background-image: -moz-linear-gradient(top, #3fa8c6 0%, #3fa8c6 0%, #399ab2 100%);
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#3fa8c6), color-stop(0%,#3fa8c6), color-stop(100%,#399ab2));
  background-image: -webkit-linear-gradient(top, #3fa8c6 0%,#3fa8c6 0%,#399ab2 100%);
  background-image: -o-linear-gradient(top, #3fa8c6 0%,#3fa8c6 0%,#399ab2 100%);
  background-image: -ms-linear-gradient(top, #3fa8c6 0%,#3fa8c6 0%,#399ab2 100%);
  background-image: linear-gradient(to bottom, #3fa8c6 0%,#3fa8c6 0%,#399ab2 100%);
  color: #fff;

  font-family: 'Doppio One', sans-serif;
  text-shadow: 0 1px 0 rgba(0,0,0,.3);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrapper {
  width: 50%;
  margin: 0 auto;
}

h1, h2, h3, h4, h5, h6 {
  letter-spacing: -0.03em;
  font-size: 2em;
}

a {
  border-bottom: 1px solid #fff;
  border-bottom: 1px solid rgba(255,255,255,0.7);
  padding-bottom: 0.15em;
  position: relative;

  color: white;
  text-decoration: none;
}

a:after {
  content: '';
  position: absolute;
  height: 1px;
  left: 0;
  right: 0;
  bottom: -2px;
  background: rgba(0,0,0,.1);
}

a:hover {
  color: #C0E3EC;
}

h1 {
  margin: 0.667em 0 0;
  padding-left: 0.5em;
  text-align: left;
}

h2 {
  font-size: 1.5em;
}

small {
  margin-top: 1em;
  display: block;
  font-style: italic;
  font-size: 0.667em;
}

p em {
  font-style: none;
}

#welcome {
  position: relative;
  overflow: hidden;
  padding-bottom: 1em;
  padding-left: 20px;
}

#welcome > div {
  padding-top: 1px;
}

#dave {
  float: left;
  margin-top: 3em
}

#welcome > h2 {
  margin-top: 0.5em;
  padding-left: 0.5em;
  margin-bottom: 0;
}

.bubble p {
  line-height: 22px;
}

.bubble {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.1);

  padding: 0.667em 1em;
  position: relative;
}

.bubble:after {
  content: "";
  position: absolute;

  width: 0;
  height: 0;
  border-top: 20px solid transparent;
  border-bottom: 20px solid transparent;
  border-right: 20px solid white;
  border-right-color: inherit;
  top: 50px;
  left: -20px;
}

#features {
  margin: 0.444em 0 0;
  clear: both;
}

#features > h2 {
  margin: 0;
}

#features ol {
  position: relative;
  padding: 1em 0 1.5em;
  background: rgba(0,0,0,.1);
  border-color: rgba(0,0,0,.1);
  margin: 0;
  overflow: hidden;
  list-style: none;
  counter-reset: item;
}

#features li {
  width: 30%;
  padding: 0 1.5%;
  float: left;
  text-align: center;
  margin-bottom: 1em;
}

#features li h2 {
  display: block;
  padding: 1em;
  margin: 0.667em auto 1em;
  font-size: 1em;

  line-height: 1em;
  text-align: center;

  background: rgba(0,0,0,.1);
  border-radius: 2em;
  box-shadow: inset 0 0 1em rgba(0,0,0,.1), 0 2px 2px rgba(255,255,255,.1);
}

#next > div {
  width: 45%;
  float: left;
  padding: 0 2.5%;
}

img {
  z-index: 1;
  -webkit-transition: -webkit-transform 2s ease-in-out;
 -moz-transition: -moz-transform 2s ease-in-out;
 -o-transition: -o-transform 2s ease-in-out;
 -ms-transition: -ms-transform 2s ease-in-out;
 transition: transform 2s ease-in-out;
 position: relative;
}

img:active {
  -webkit-transform: rotate(1440deg) scale(1.2);
  -moz-transform: rotate(1440deg) scale(1.2);
  -o-transform: rotate(1440deg) scale(1.2);
  -ms-transform: rotate(1440deg) scale(1.2);
  transform: rotate(1440deg) scale(1.2);
}

@media screen and (max-width: 1200px) {
  .wrapper {
    width: 80%;
  }
}

@media screen and (max-width: 768px) {
  .wrapper {
    width: auto;
    margin: 0;
  }
  #welcome {
    margin-right: 2.5%;
  }
}

@media screen and (max-width: 500px) {
  .wrapper {
    text-align: center;
  }
  #dave {
    float: none;
  }

  #welcome {
    padding: 0 1.5em;
    margin: 0;
  }

  h1 {
    text-align: center;
    margin-bottom: 0;
    padding-left: 0;
    font-size: 1.8em;
  }
  #welcome > h2 {
    margin-bottom: 0.667em;
  }
  .bubble {
    text-align: center;
  }
  .bubble:after {
    display: none;
  }
  #features li {
    width: 47%;
  }
  #features li:last-child {
    float: none;
    clear: both;
    margin: 0 auto;
  }

  #next > div {
    float none;
    width: auto;
  }
}