html,body {
  height:100%;
  margin:0;
  padding:0;
}
.top{
    height:50%;
    min-height:50%;
    width:100%;
    display:block;
    background-color:#ffe600;
}
.bottom{
    height:50%;
    min-height:50%;
    width:100%;
    display:block;
    background: -webkit-linear-gradient(#ddd, #666); /* For Safari 5.1 to 6.0 */
    background: -o-linear-gradient(#ddd, #666); /* For Opera 11.1 to 12.0 */
    background: -moz-linear-gradient(#ddd, #666); /* For Firefox 3.6 to 15 */
    background: linear-gradient(#ddd, #666); /* Standard syntax (must be last) */
}
.form-signin {
    position:absolute;
    top:0;
    left:0;
    bottom:0;
    right:0;
    height:225px;
    margin:auto;
    width: 330px;
    padding: 15px;
    padding-top:0px;
    padding-bottom:5px;
    background-color:#666;
    border-radius: 10px;
    box-shadow: 10px 10px 5px #555;
}
.form-signin .form-signin-heading {
    color:#fff;
    margin-bottom: 10px;
}
.form-signin .form-control {
  position: relative;
  height: auto;
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin input[type="email"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
#message{
    font-size:18px;
    font-weight:bold;
    text-align:center;
}