.container {
            max-width: 800px;
            margin: 40px auto;
            padding: 20px;
            background-color: #fff;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }

        h1 {
            font-size: 2.5em;
            text-align: center;
            color: #111;
            margin-bottom: 10px;
        }

        h2 {
            font-size: 1.5em;
            text-align: center;
            color: #555;
            margin-top: 0;
        }

        p {
            font-size: 1.1em;
            text-align: justify;
        }

        .author {
            font-style: italic;
            text-align: right;
            margin-top: 20px;
            color: #777;
        }

        hr {
            border: 0;
            border-top: 1px solid #ccc;
            margin: 30px 0;
        }
 .article {
            max-width: 900px;
            margin: auto;
            background: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }

        h1, h2 {
            text-align: center;
        }

        h1 {
            color: #222;
            font-size: 2em;
        }

        h2 {
            font-size: 1.5em;
            color: #555;
            margin-top: -10px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }

        th, td {
            border: 1px solid #ccc;
            padding: 10px;
            text-align: center;
        }

        .fact {
            background: #eef;
            padding: 15px;
            border-left: 5px solid #66aaff;
            margin: 20px 0;
            font-style: italic;
        }

        .quote {
            font-style: italic;
            color: #444;
            margin: 20px 0;
            padding-left: 15px;
            border-left: 3px solid #999;
        }
 .quote {
            font-style: italic;
            background: #f0f0f0;
            padding: 15px;
            border-left: 4px solid #007acc;
            margin: 20px 0;
        }

        ol {
            margin-left: 20px;
        }

        strong {
            color: #007acc;}
 strong2 {
            color: #f50707;
font-style: normal;
font-weight: bold;
        }
.footnote {
    font-size: 0.95em;
    color: #555;
    background: #f7f7f7;
    border-left: 4px solid #007acc;
    padding: 15px 20px;
    margin-top: 30px;
    font-style: normal;
    border-radius: 5px;
}
.quick-tip {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    padding: 15px 20px;
    border-radius: 8px;
    font-size: 1em;
    max-width: 600px;
    margin: 20px auto;
}
.quick-tip2 {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
    padding: 15px 20px;
    border-radius: 8px;
    font-size: 1em;
    max-width: 600px;
    margin: 20px auto;
}
.exercise-tip {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
    padding: 15px 20px;
    border-radius: 8px;
    font-size: 1em;
    max-width: 600px;
    margin: 20px auto;
}
h2 {
            
            
            margin-top: 30px;