* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.chat-container {
    width: 100%;
    max-width: 500px;
    height: 90vh;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-output {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    border-bottom: 1px solid #ddd;
}

.chat-output p {
    margin: 8px 0;
    padding: 8px 12px;
    border-radius: 12px;
    background-color: #f1f1f1;
    word-wrap: break-word;
    max-width: 80%;
}

.chat-output p.user {
    background-color: #d1e7ff;
    align-self: flex-end;
}

.chat-form {
    display: flex;
    flex-wrap: wrap;
    padding: 8px;
    gap: 8px;
    border-top: 1px solid #ddd;
}

.chat-form input {
    flex: 1 1 60%;
    padding: 10px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    outline: none;
}

.chat-form button {
    flex: 1 1 18%;
    padding: 10px;
    border: none;
    border-radius: 6px;
    background-color: #007bff;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
}

.chat-form button[type="button"] {
    background-color: #6c757d;
}

.chat-form button:hover {
    opacity: 0.9;
}

@media (max-width: 480px) {
    .chat-container {
        height: 95vh;
    }

    .chat-form input, 
    .chat-form button {
        flex: 1 1 100%;
    }

    .chat-form {
        gap: 4px;
    }
}