*{
    box-sizing: border-box;
}
#LoginContainer{
    background-color: #333;
    width: 600px;
    height: 300px;
    border-radius: 30px;
}
#tituloLogin{
    color: white;
    background-color: rebeccapurple;
    border-top-right-radius: 30px;
    border-top-left-radius: 30px;
}