.announcement {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    background-color: #eaf2e9;
}

@media (prefers-color-scheme: dark) {
    .announcement {
        background-color: #1a2b1d;
    }
}

.announcement > h2 {
    margin-top: 0;
    font-size: 2.0rem;
}

.announcement-meta {
    font-size: 0.9em;
    color: #666;
    font-style: italic;
}

@media (prefers-color-scheme: dark) {
    .announcement-meta {
        color: #999;
    }
}