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

/* ---------- Header ---------- */
header {
    background-color: #222;
    color: #fff;
    text-align: center;
    padding: 20px 10px;
}

header h1 {
    margin: 0;
    font-size: 2.2em;
}

header h2 {
    margin: 5px 0 0;
    font-weight: normal;
    font-size: 1.2em;
}

/* ---------- Navigation ---------- */
nav {
    background-color: #444;
}

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

nav li {
    margin: 0;
}

nav a {
    display: block;
    padding: 12px 18px;
    color: #fff;
    text-decoration: none;
}

nav a:hover {
    background-color: #666;
}

/* ---------- Main Content ---------- */
main {
    max-width: 900px;
    margin: 30px auto;
    padding: 0 20px;
}

section {
    background-color: #fff;
    padding: 20px;
    border-radius: 6px;
}

section h3 {
    margin-top: 0;
}

/* ---------- Footer ---------- */
footer {
    text-align: center;
    padding: 15px;
    background-color: #222;
    color: #fff;
    margin-top: 40px;
    font-size: 0.9em;
}