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

header {
    background-color: #007BFF;
    padding: 10px 0;
    text-align: center;
}

header nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

header nav ul li {
    display: inline;
    margin: 0 15px;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

header nav ul li a.active {
    text-decoration: underline;
}

.main {
    padding: 20px;
}

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

.about-section h1 {
    color: #007BFF;
    margin-bottom: 20px;
}

.about-section p {
    font-size: 1.1em;
    line-height: 1.6em;
    margin-bottom: 20px;
}

.about-section ul {
    list-style: none;
    padding: 0;
}

.about-section ul li {
    background: #007BFF;
    color: white;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}

footer {
    background-color: #007BFF;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}