body {
  font-size: 18px;
}

.cell-output {
    border-left: 4px solid lightgray; 
    padding-left: 10px;
}

.remark {
    font-weight: bold;
    color: #214a6b;
}

.attention {
    font-weight: bold;
    color: #7d0b26;
}

.title-code {
    font-family: 'Fira Mono', monospace;
}

.img-center {
    display: block !important; 
    margin-left: auto !important;
    margin-right: auto !important;
}