body {
    background-color: #f3f3f3;
    font-family: Arial, sans-serif;
}

.container {
    width: 90%;
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    border-radius: 2px;
    overflow: hidden;
}

.header {
    background-color: #333;
    color: #fff;
    padding: 32px 0 24px 0;
    text-align: center;
    font-size: 2rem;
}

.nav {
    background-color: #444;
    display: flex;
    justify-content: center;
    gap: 40px;
}

.nav a {
    color: #fff;
    font-weight: bold;
    text-decoration: none;
    padding: 18px 0;
    display: inline-block;
}

.content-area {
    display: flex;
    padding: 40px 32px 40px 32px;
    gap: 24px;
}

.main-content {
    flex: 3;
}

.main-content h2 {
    font-size: 1.5rem;
    margin: 0 0 12px 0;
    font-weight: bold;
}

.sidebar {
    flex: 1;
    background-color: #ededed;
    padding: 22px;
    border-radius: 2px;
}

.sidebar h2 {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 18px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar ul li {
    margin-bottom: 14px;
}

.footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 18px 0;
    font-size: 1rem;
}