Module:Message box/style.css

.box
{
    border: solid black 1px;
    border-left: solid black 10px;
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
}

.box h4
{
    margin: 0;
}
.box p
{
    margin: 0;
    margin-left: 20px;
}