body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.chat-container {
    width: 400px;
    max-width: 90%;
    background: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    overflow: hidden;
}

.chat-header {
    background: #007bff;
    color: white;
    text-align: center;
    padding: 10px;
    font-size: 18px;
    font-weight: bold;
}

.chat-box {
    height: 400px;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: #e9ecef;
}

.message {
    max-width: 75%;
    padding: 10px;
    border-radius: 10px;
    font-size: 14px;
    word-wrap: break-word;
}

.sent {
    align-self: flex-end;
    background: #007bff;
    color: white;
    border-bottom-right-radius: 2px;
}

.received {
    align-self: flex-start;
    background: #e1e1e1;
    color: black;
    border-bottom-left-radius: 2px;
}

.button-container {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: #fff;
}

button {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: 0.2s;
}

button:hover {
    background: #0056b3;
}