body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #e0f7fa;
}

header {
    background-color: #00796b;
    color: white;
    padding: 10px 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

.navbar {
    display: flex;
    justify-content: center;
    background-color: #004d40;
}

.navbar a {
    color: white;
    padding: 14px 20px;
    text-decoration: none;
    text-align: center;
}

.navbar a:hover {
    background-color: #00251a;
}

.container {
    padding: 20px;
}

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

.responsive-img {
    width: 100%;
    height: auto;
}

@media (max-width: 600px) {
    .navbar {
        flex-direction: column;
    }
}