*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}


body
{
    background-color: #f4f4f4;
    padding-top: 200px;
    color: #333;
    line-height: 1.6;
    font-size: 16px;
    display: flex;
    flex-direction: column;
}


header
{
    background: #333;
    color: white;
    padding: 20px 0;
    text-align: center;
    position: fixed;
    top: 0;
    width: 100%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

header h1
{
    color: white;
}

nav ul
{
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav ul li
{
    display: inline;
}

nav ul li a
{
    text-decoration: none;
    color: white;
    font-size: 18px;
    padding: 10px 15px;
    transition: 0.3s ease-in-out;
}

nav ul li a:hover
{
    background-color: #555;
    border-radius: 5px;
}


main
{
    padding: 100px 20px;
    text-align: center;
}


section
{
    background: white;
    padding: 50px;
    margin: 20px auto;
    width: 80%;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}


h1, h2
{
    color: #444;
    margin-bottom: 15px;
}


ul
{
    list-style-type: none;
    padding: 0;
}

ul li
{
    margin-bottom: 15px;
    line-height: 1.5;
}


p
{
    margin: 5px 0;
}


a
{
    color: #007BFF;
    text-decoration: none;
    transition: 0.3s ease-in-out;
}

a:hover
{
    text-decoration: underline;
}


img
{
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    display: block;
    margin: 10px auto;
    transition: transform 0.3s ease-in-out;
}

img:hover
{
    transform: scale(1.05);
}


footer
{
    background: #333;
    color: white;
    text-align: center;
    padding: 15px 0;
    position: relative;
    bottom: 0;
    width: 100%;
}


@media (max-width: 768px)
{
    nav ul
    {
        flex-direction: column;
    }

    nav ul li
    {
        margin-bottom: 10px;
    }

    section
    {
        width: 95%;
    }
}


.container
{
    max-width: 900px;
    margin: auto;
    padding: 20px;
}


strong
{
    color: #000;
    font-weight: bold;
}


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

table, th, td
{
    border: 1px solid #ddd;
}

th, td
{
    padding: 10px;
    text-align: left;
}

th
{
    background-color: #333;
    color: white;
}


blockquote
{
    font-style: italic;
    margin: 20px;
    padding: 15px;
    background: #eee;
    border-left: 5px solid #333;
}


button
{
    background-color: #007BFF;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease-in-out;
}

button:hover
{
    background-color: #0056b3;
}


ul.custom-list
{
    list-style-type: square;
    margin-left: 20px;
}

ul.custom-list li
{
    margin-bottom: 10px;
}

pre
{
    background: #eee;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}


hr
{
    margin: 20px 0;
    border: none;
    height: 1px;
    background: #ddd;
}