body{
    background-color: #ccc;
}
.contenido{
    margin: 30px;
    padding: 20px;
    background-color: #FFFFFF;
}

label{
    font-size: 0.8rem;
    font-weight: bold;
}

input[type="text"]{
    background-color: #e9ecef;
}

button[type="submit"]{
    float: right;
    width: 100px;
}

select{
    background-color: #e9ecef;
}

h3{
    text-align: center;
    margin-bottom: 20px;
}