.bd-callout {
    /*
    padding: 1.25rem;
    margin-top: 1.25rem;
    margin-bottom: 1.25rem;
    */
    border-left: 7px solid #eee;
    /*border-left-width: 0.25rem;*/
    border-radius: 0.15rem;
}
.bd-callout-info {
    border-left-color: #17a2b8;
}
.bd-callout-secondary {
    border-left-color: #6c757d;
}
.bd-callout-warning {
    border-left-color: #ffc107;
}
.bd-callout-danger {
    border-left-color: #dc3545;
}
.bd-callout-success {
    border-left-color: #28a745;
}