body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1e1e1e;
    color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.chat-container {
    width: 450px;
}

.chat-box {
    height: 400px;
    background-color: #2c2c2c;
    overflow-y: auto;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #444;
    margin-bottom: 20px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.5);
}

.notification {
    padding: 10px;
    background-color: #9146ff;
    color: white;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 10px;
    font-weight: bold;
}

.controls {
    display: flex;
    flex-direction: column;
}

textarea, input[type="file"] {
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 8px;
    border: none;
    background-color: #333;
    color: #ddd;
    font-size: 14px;
    resize: none;
}

button {
    padding: 10px;
    border-radius: 8px;
    border: none;
    background-color: #9146ff;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #772ce8;
}

.message {
    margin-bottom: 10px;
}