body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #1a1a2e; /* Solid dark background as fallback */
    background-size: cover;
    background-attachment: scroll; /* Ensures background scrolls with content */
    color: #e0e0e0; /* Light text for dark background */
}

.main-header {
    text-align: center;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.7); /* Semi-transparent background for readability */
}

.main-header h1 {
    font-size: 15px; /* As requested */
    color: #00ffcc; /* Futuristic glow color */
    margin: 0;
    text-shadow: 0 0 10px #00ffcc;
}

main {
    max-width: 960px;
    margin: 20px auto;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.8); /* Semi-transparent background for main content */
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.3);
}

section {
    margin-bottom: 30px;
    padding: 20px;
    border: 1px solid rgba(0, 255, 204, 0.3);
    border-radius: 5px;
    background-color: rgba(0, 0, 0, 0.6);
}

h2 {
    color: #00ffcc;
    border-bottom: 1px solid rgba(0, 255, 204, 0.5);
    padding-bottom: 10px;
    margin-top: 0;
}

#topic-list button {
    margin-right: 10px;
    margin-bottom: 10px;
    padding: 8px 15px;
    background-color: #005544;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}

#topic-list button.active {
    background-color: #00ffcc;
    color: #000;
}

input[type="text"], textarea, select {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #00ffcc;
    background-color: #0d0d0d;
    color: #e0e0e0;
    border-radius: 3px;
}

button {
    padding: 10px 20px;
    background-color: #00ffcc;
    color: #000;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #00e6b3;
}

.post {
    background-color: rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(0, 255, 204, 0.2);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 5px;
}

.post-meta {
    font-size: 0.9em;
    color: #a0a0a0;
    margin-bottom: 10px;
}

.post-meta .author-type {
    font-weight: bold;
    color: #00ffcc;
}

.comment-section {
    margin-top: 15px;
    padding-left: 20px;
    border-left: 2px solid rgba(0, 255, 204, 0.1);
}

.comment {
    background-color: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 255, 204, 0.1);
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 3px;
}

.comment-meta {
    font-size: 0.8em;
    color: #b0b0b0;
    margin-bottom: 5px;
}

.comment-meta .author-type {
    font-weight: bold;
    color: #00e6b3;
}