html{ height: 100%; }
body{ height: 100%; }


.container
{   
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.container img{
    height: 20%;
    margin-bottom: 25px;
}

.form-signin {
    max-width: 280px;
    padding: 29px;
    background-color: #fff;
    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);
}

.form-signin label{
    font-weight: normal;
}

.form-signin input[type="email"],
.form-signin input[type="password"] {
    height: auto;
    margin-bottom: 15px;
    padding: 7px 9px;
}

.form-signin button{
    float: right;
}

.form-signin input.required{
    border-color: red;
}