/* Base styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    margin: 0;
    padding: 0;
}

header, footer {
    background-color: #007bff;
    color: white;
    text-align: center;
    padding: 1em 0;
}

nav {
    background-color: #343a40;
    text-align: center;
}

nav a {
    color: #f8f9fa;
    padding: 14px 20px;
    display: inline-block;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    background-color: #495057;
}

button#theme-toggle {
    background-color: #ffc107;
    border: none;
    color: black;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 5px;
    font-weight: bold;
}

button#theme-toggle:hover {
    background-color: #e0a800;
}

/* Posts grid */
.posts-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: 20px;
}

.post-preview {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin: 10px;
    max-width: 300px;
    flex: 1 1 250px;
    padding: 15px;
    text-align: center;
}

.post-preview img {
    max-width: 100%;
    border-radius: 8px;
}

/* Dark mode */
body.dark-mode {
    background-color: #121212;
    color: #e0e0e0;
}

body.dark-mode header, 
body.dark-mode footer {
    background-color: #1f1f1f;
}

body.dark-mode nav {
    background-color: #222;
}

body.dark-mode nav a {
    color: #e0e0e0;
}

body.dark-mode nav a:hover {
    background-color: #333;
}

body.dark-mode button#theme-toggle {
    background-color: #28a745;
    color: white;
}

body.dark-mode button#theme-toggle:hover {
    background-color: #218838;
}

body.dark-mode .post-preview {
    background-color: #1e1e1e;
    border-color: #444;
}

/* Responsive design */
@media (max-width: 768px) {
    nav a {
        display: block;
        padding: 10px;
    }
}