body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #e9ecef;
    color: #343a40;
    line-height: 1.6;
}

#app {
    max-width: 960px;
    margin: 20px auto;
    padding: 30px;
    background-color: #ffffff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

#app h1, #app h2, #app h3 {
    color: #0056b3;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

#app p {
    margin-bottom: 1em;
}

#app pre {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 15px;
    overflow-x: auto;
}

#app code {
    font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
    background-color: #e9ecef;
    padding: 2px 4px;
    border-radius: 3px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #app {
        margin: 10px;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    #app {
        padding: 15px;
    }
}