/* Reset dan basic styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f9f9f9;
    color: #333;
    padding: 0 20px;
}

header {
    background-color: #007BFF;
    padding: 15px 0;
}

header nav ul.menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
}

header nav ul.menu li {
    margin: 0 10px;
}

header nav ul.menu li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

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

main {
    max-width: 900px;
    margin: 20px auto;
    background: #fff;
    padding: 20px;
    border-radius: 5px;
}

h1 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: #007BFF;
}

h2 {
    font-size: 1.5rem;
    margin-top: 20px;
    margin-bottom: 10px;
    color: #333;
}

ul, ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

ul li, ol li {
    margin-bottom: 8px;
}

footer {
    text-align: center;
    padding: 15px 0;
    margin-top: 30px;
    background-color: #007BFF;
    color: #fff;
    border-radius: 5px;
}