header {
  -webkit-transition: height 0.3s;
  -moz-transition: height 0.3s;
  -ms-transition: height 0.3s;
  -o-transition: height 0.3s;
  transition: height 0.3s; }
  header #logo {

    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    -ms-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s; }

  header.smaller {
    height: 75px; background:#0CF; color:#000;}
    header.smaller #logo {
      width: 150px;
      height: 75px;
	  color:#000;
      line-height: 75px;
      font-size: 30px; }