body {
    margin: 0;
    padding: 0;
    background-image: url('/imagenes/scanetff.png');
    background-size:cover;
    font-family: sans-serif;
}
.loginbox {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 350px;
    height: 420px;
    padding: 80px 40px;
    box-sizing: border-box;
    background: RGBA( 0, 0, 139, 0.5 );
}
.user{
    width:100px;
    height:100px;
    overflow:hidden;
    top: calc(-100px/2);
    left: calc(50% - 50px);
    position:absolute;
}
h1{
    padding:0;
    margin:0;
    text-align:center;
    color: rgb(255,217,9);
}

.lblusuario,.lblpass{
    font-weight:bold;
    color:#fff;
}
.txtusuario, .txtpass, .dll_usuario, .btningresar{
    width:100%;
    margin-bottom:20px;
     
}
.txtusuario, .txtpass, dll_usuario {
    border: none;
    border-bottom: 3px solid #fff;
    outline: none;
    height: 40px;
    color: #fff;
    font-size: 16px;
    background-color: transparent;
}
.dll_usuario{
    border-radius:5px;
    height:30px;
}
.placeholder{
    color:rgba(255, 255, 255,.2)
}
.btningresar{
    border:none;
    outline:none;
    height:40px;
    font-size:16px;
    color:#fff;
    background-color:rgb(255,9,9);
    cursor:pointer;
    border-radius:10px;
    transition: .3s ease-in-out;
}

.btningresar:hover{
    background-color: rgb(255,217,9);
    color:black;
}

.btncerrars{
    border:none;
    outline:none;
    text-align:right;
    height:40px;
    font-size:12px;
    color:#fff;
    background-color:rgb(255,9,9);
    cursor:pointer;
    border-radius:10px;
    transition: .3s ease-in-out;
 }

.btncerrars:hover{
    background-color: rgb(255,217,9);
    color:black;
}