body
{
    margin:0;
    padding: 0;
    font-family: sans-serif;
    background: url(../img/imagenlogin.jpg);
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.box
{
    position:absolute;
    top:50%;
    left: 50%;
    transform:translate(-50%,-50%);
    width: 400px;
    padding: 40px;
    background: rgba(0,0,0,.8);
    box-sizing: border-box;
    box-shadow: 0 15px 35px rgba(0,0,0,.5);
    border-radius:10px;


}

.box h2
{
margin: 0 0 30px;
padding: 0;
color: #fff;
text-align: center;

}

.box .inputBox
{
    position: relative;
}

.box .inputBox input
{
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    color: #fff;
    letter-spacing: 1px;
    margin-bottom: 30px;
    border:none;
    border-bottom: 1px solid #fff;
    outline: none;
    background: transparent;
}

.box .inputBox label
{
    position: absolute;
    top:0;
    left:0;
    padding:10px 0;
    font-size: 16px;
    color:#fff;
    pointer-events: none;
    transition: .5s;
}

.box .inputBox input:focus ~ label,
.box .inputBox input:valid ~ label
{

    top: -18px;
    left:0;
    color: #ff9541;
    font-size: 12px;
      
}





.box input[type="submit"]
{
background: transparent;
border: none;
outline: none;
color: #fff;
background: #ff9541;
padding: 10px 20px;
cursor: pointer;
border-radius: 5px;

}

a.cerrar
{
    position: relative;    
    top: -30px;
    right: -330px;

    text-decoration: none;
    color: rgb(172, 166, 166);
}

a.cerrar:hover
{
    color:white;
}