body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
#chat-container {
    width: 90%;
    max-width: 600px;
    height: 80vh;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}
#chat-log {
    flex-grow: 1;
    overflow-y: auto;
    padding: 20px;
}
.message {
    padding: 12px 18px;
    border-radius: 18px;
    margin-bottom: 10px;
    max-width: 80%;
    line-height: 1.4;
}
.message.user {
    background-color: #007aff;
    color: white;
    align-self: flex-end;
    margin-left: auto;
}
.message.assistant {
    background-color: #e5e5ea;
    color: black;
    align-self: flex-start;
}
#input-container {
    display: flex;
    padding: 20px;
    border-top: 1px solid #ddd;
}
#message-input {
    flex-grow: 1;
    border: 1px solid #ccc;
    border-radius: 18px;
    padding: 10px 15px;
    font-size: 16px;
    margin-right: 10px;
}
#send-button {
    background-color: #007aff;
    color: white;
    border: none;
    border-radius: 18px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}