body {
    background-color: #1B2947;
    color: #FFFFFF;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    padding: 20px;
}

.intro-container {
    max-width: 960px;
    margin: auto;
    background-color: #868db0;
    color: #333;
    padding: 2em;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.intro-container h1 {
    color: goldenrod;
    font-size: 2em;
    margin-bottom: 0.5em;
}

.intro-container h2 {
    margin-top: 2em;
    color: #2c3e50;
    font-size: 1.5em;
}

.intro-container p {
    margin-bottom: 1em;
}

.intro-container ol,
.intro-container ul {
    margin-left: 1.5em;
    margin-bottom: 1.5em;
}

.intro-container a {
    color: #036;
    text-decoration: none;
    font-weight: bold;
}

.intro-container a:hover {
    color: #ffcc00;
    text-decoration: underline;
}

.toc-links {
    padding-left: 1.2em;
    margin-bottom: 2em;
}