body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #fdfdfd;
    color: #222;
}
header {
    background-color: #004080;
    color: white;
    padding: 20px;
    text-align: center;
}
footer {
    background-color: #003060;
    color: white;
    padding: 10px;
    text-align: center;
}
nav {
    background-color: #0055a5;
    padding: 10px;
    text-align: center;
}
nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
}
nav a:hover {
    text-decoration: underline;
}
main {
    padding: 20px;
}
img.responsive {
    max-width: 100%;
    height: auto;
    border: 1px solid #ccc;
    margin: 10px 0;
}
.gallery img {
    max-width: 300px;
    margin: 10px;
    border-radius: 8px;
}
.floating-buttons {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}
.floating-buttons a {
    display: block;
    margin: 10px 0;
    text-decoration: none;
    color: white;
    padding: 12px 20px;
    border-radius: 5px;
    font-weight: bold;
}
.floating-buttons a:first-child { background-color: #25D366; }
.floating-buttons a:last-child { background-color: #007BFF; }