.back {
  background: #e2e2e2;
  width: 100%;
  position: absolute;
  top: 0;
  bottom: 0;
}
.div-center {
  width: 400px;
  height: 400px;
  background-color: #fff;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  max-width: 100%;
  max-height: 100%;
  overflow: auto;
  padding: 1em 2em;
   border: 1px solid #e5e5e5;
    -webkit-border-radius: 5px;
       -moz-border-radius: 5px;
            border-radius: 5px;
    -webkit-box-shadow: 0 1px 2px rgba(0,0,0,.05);
       -moz-box-shadow: 0 1px 2px rgba(0,0,0,.05);
            box-shadow: 0 1px 2px rgba(0,0,0,.05);
  display: table;
}

div.content {
  display: table-cell;
  vertical-align: middle;
}

#logo-container{
  margin: auto;
  margin-bottom: 10px;
  width:200px;
  height:30px;
  background-image:url('../../../images/logo.png');
}

.div-center-login {
  width: 400px;
  height: 400px;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  display: table;
}