body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    transition: background 0.3s, color 0.3s;
}

.dark-mode {
    background-color: #121212;
    color: #f4f4f4;
}

nav {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: #222;
    color: white;
}

.moon-button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
}

.container {
    width: 90%;
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.dark-mode .container {
    background: #1e1e1e;
}

.announcements {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.announcement {
    padding: 15px;
    border-left: 5px solid #007bff;
    background: #fff;
    border-radius: 5px;
}

.dark-mode .announcement {
    background: #2a2a2a;
}

.timestamp {
    font-size: 0.8rem;
    color: gray;
}

button {
    padding: 10px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background: #0056b3;
}