body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.handbook-container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
}

.subtitle, .version-info {
    text-align: center;
    color: #666;
}

h2 {
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    margin-top: 20px;
}

h3 {
    color: #444;
}

.dos-donts {
    display: flex;
    justify-content: space-between;
}

.dos, .donts {
    width: 48%;
}

.dos {
    color: #2e7d32;
}

.donts {
    color: #c62828;
}

ul, ol {
    padding-left: 20px;
}

li {
    margin-bottom: 10px;
}

strong {
    font-weight: bold;
}