* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f7;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    text-align: center;
    margin: 30px 0;
    color: #1d1d1f;
}

h2 {
    margin: 20px 0 10px;
    color: #1d1d1f;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
}

nav a {
    text-decoration: none;
    color: #0066cc;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: #e8e8ed;
}

.content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.content p, .content ul {
    margin-bottom: 15px;
}

.content ul {
    padding-left: 20px;
}

footer {
    text-align: center;
    margin-top: 30px;
}

footer a {
    color: #0066cc;
    text-decoration: none;
}

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