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

html, body {
    height: 100%;
    display: flex;
    flex-direction: column;
    color: #333;
    line-height: 1.6;
    font-size: 16px;
    padding-top: 60px;
}

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;
}


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: 80px 20px;
    text-align: center;
}

section
{
    background: white;
    padding: 20px;
    margin: 20px auto;
    width: 80%;
    max-width: 800px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

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%;
    }
}