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

header {
    background-color: #0066cc;
    color: white;
    padding: 10px 0;
}

.top-bar {
    text-align: center;
    font-size: 0.9em;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}

.logo {
    font-size: 1.5em;
}

.burger-menu {
    display: none;
    font-size: 1.5em;
    cursor: pointer;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
}

.nav-links li a {
    text-decoration: none;
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links li a:hover {
    background-color: #004080;
}

main {
    padding: 20px;
}

.content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.center {
    display: block;
    margin: 0 auto 20px auto;
}

footer {
    background-color: #0066cc;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

@media (max-width: 768px) {
    .burger-menu {
        display: block;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: #0066cc;
    }
    .nav-links li {
        text-align: center;
        padding: 10px 0;
        border-top: 1px solid #004080;
    }
    .nav-links li a {
        padding: 10px 20px;
    }
    .nav-links.show {
        display: flex;
    }
}