body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

header {
    background-color: #004d40;
    color: white;
    padding: 20px;
    text-align: center;
}

main {
    padding: 20px;
}

section {
    margin-bottom: 40px;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h2 {
    border-bottom: 2px solid #004d40;
    padding-bottom: 10px;
    color: #004d40;
}

article {
    margin-bottom: 20px;
}

h3 {
    margin: 0;
    font-size: 1.5em;
    color: #333;
}

h4 {
    margin: 0;
    font-size: 1.2em;
    color: #666;
}

p {
    line-height: 1.6;
    margin: 10px 0;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px 0;
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    background-color: #00695c;
    border-top: 2px solid #004d40;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 10px 20px;
    display: block;
    transition: background-color 0.3s ease;
    text-align: center;
}

.nav-menu a:hover {
    background-color: #004d40;
}


@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        align-items: center;
    }

    .nav-menu a {
        padding: 15px;
        width: 100%;
    }
}


footer {
    background-color: #004d40;
    color: white;
    text-align: center;
    padding: 10px;
    position: relative;
    bottom: 0;
    width: 100%;
}