body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; /* Cleaner font similar to what's used in many modern UIs */
    background-color: #fafafa; /* Lighter background for better contrast */
}

#chatgpt-simulator {
    display: flex;
    flex-direction: column;
    max-height: 100vh;
    min-height: auto;
    background-color: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05); /* Softer shadow for a more subtle depth */
}

#chatgpt-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 20px;
    background-color: #f9f9f9; /* Slightly off-white background for the messages area */
}

#chatgpt-messages div {
    margin-bottom: 12px;
    padding: 15px;
    background-color: #ffffff;
    border-radius: 12px; /* More pronounced rounded corners */
    box-shadow: 0 1px 3px rgba(0,0,0,0.1); /* Lighter shadow for each message */
    border-left: 3px solid #007bff; /* Subtle branding color as an accent */
}

#chatgpt-input-area {
    display: flex;
    padding: 12px;
    background: #fff; /* Matching the input area with the chat background */
    border-top: 2px solid #eee; /* Slightly darker border for a subtle separation */
}

#chatgpt-input {
    margin: 10px 20px;
    padding: 12px 15px;
    border: 1px solid #ddd; /* Softer border color */
    border-radius: 20px; /* More modern rounded input */
    outline: none;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1); /* Subtle inset shadow for depth */
}

#chatgpt-send {
    margin: 10px 20px;
    padding: 10px 20px;
    border: none;
    background-color: #007bff;
    color: #ffffff;
    border-radius: 20px; /* Rounded button for consistency with input */
    cursor: pointer;
    transition: background-color 0.3s; /* Smooth transition for hover effect */
}

#chatgpt-send:hover {
    background-color: #0056b3;
}