html{
  font-family: Helvetica, Arial, sans-serif;
  font-size:100%;
  background:lightgrey;
}

h1{
  margin-top: 0;
}

h2{
  font-size:0.9em;
  text-transform: uppercase;
}

hr{
  margin: 1.5em 0;
  border: 0;
  border-top: 1px solid grey;
}

button{
  display: inline-block;
  border-radius: 50%;
  border: none;
  font-size: 0.9em;
  padding: 0.7em;
  background: darkslategrey;
  color: lightgrey;
  font-weight: bold;
  margin: 0.5em 0.25em 0;
  text-align: center;
}

button:hover, button:focus{
  opacity: 0.75;
  cursor: pointer;
}

button:active{
  opacity: 1;
  box-shadow: 0 -3px 10px rgba(0,0,0,0.1) inset;
}

img:-webkit-full-screen, img:-moz-full-screen, img:-ms-fullscreen, img:full-screen, img:fullscreen{
  max-width:none;
}

h1, h2{
  color: darkslategrey;
}
body{
  margin-bottom:65px;
}
#i1, #i2, #i3{
  width: 100%;
}

#page-wrapper{
  padding: 1em;
  margin: 1em auto;
  border-top: 5px solid darkslategrey;
  box-shadow:0 2px 10px rgba(0,0,0,0.8);
}