body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f8;
    margin: 0;
    padding: 0;
}

/* Header */
header {
    background-color: #1f2933;
    color: white;
    padding: 20px;
    text-align: center;
}

/* Navigation */
nav {
    text-align: center;
    margin: 15px 0;
}

nav a {
    margin: 0 12px;
    text-decoration: none;
    color: #1f2933;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

/* Main content */
section {
    max-width: 800px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    border-radius: 6px;
}

/* Headings */
h2 {
    color: #1f2933;
}

/* Lists */
ul {
    padding-left: 20px;
}