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 span
{
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-left: 10px;
}

.box h4
{
    margin-top: 0.25em;
    margin-bottom: 0;
}
.box p
{
    margin-left: 20px;
}