h1 {
    color: #2c3e50;
    text-align: center;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
    font-family: copperplate;
    font-weight: normal;
}

h2{
    font-family: copperplate;
    font-weight: normal;
}

h3{
    font-family: copperplate;
    font-weight: normal;
}

.command-name {
    font-weight: bold;
    color: #e74c3c;
    font-family: monospace;
    font-size: 1.1em;
}

#introduction {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #3498db;
}