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

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    transition: background-color 0.3s ease;
}

.chat-container {
    width: 350px;
    height: 500px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.3s ease;
}

.chat-container.dark {
    background-color: #2f2f2f;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    background-color: #007BFF;
    color: white;
    padding: 15px;
    text-align: center;
}

.chat-header.dark {
    background-color: #333;
}

.chat-box {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    background-color: #fafafa;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: background-color 0.3s ease;
}

.chat-box.dark {
    background-color: #444;
}

.chat-message {
    display: flex;
    flex-direction: column;
    padding: 10px;
    background-color: #f1f1f1;
    border-radius: 8px;
    max-width: 80%;
    position: relative;
    opacity: 0;
    animation: fadeIn 0.5s forwards;
}

.chat-message.user {
    align-self: flex-end;
    background-color: #007BFF;
    color: white;
}

.chat-message.bot {
    align-self: flex-start;
    background-color: #eee;
    color: #333;
}

.chat-message .timestamp {
    font-size: 0.8em;
    color: #888;
}

.chat-input {
    padding: 15px;
    display: flex;
    gap: 10px;
    background-color: #f4f4f9;
}

.chat-input.dark {
    background-color: #333;
}

#message-input {
    flex: 1;
    padding: 10px;
    border-radius: 20px;
    border: 1px solid #ddd;
}

#message-input.dark {
    background-color: #555;
    color: white;
    border: 1px solid #888;
}

#send-btn {
    padding: 10px 20px;
    border-radius: 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
}

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

.typing-indicator {
    display: none;
    font-size: 0.9em;
    color: #007BFF;
    font-style: italic;
    padding: 0 15px;
}

body.dark {
    background-color: #333;
    color: #fff;
}

.chat-container.dark {
    background-color: #2f2f2f;
}

.chat-box.dark {
    background-color: #444;
}

.chat-input.dark {
    background-color: #555;
    color: white;
}

#message-input.dark {
    background-color: #666;
    color: white;
    border: 1px solid #888;
}

.theme-btn {
    color: #fff;
}

.profile-section, .settings-section {
    background-color: #fff;
}

.profile-section.dark, .settings-section.dark {
    background-color: #444;
    color: white;
}

.theme-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    color: white;
    cursor: pointer;
}

.theme-btn:hover {
    color: #ffbf00;
}

.profile-btn,
.settings-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    color: white;
    cursor: pointer;
}

.profile-btn:hover,
.settings-btn:hover {
    color: #ffbf00;
}

.profile-section, .settings-section {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 300px;
    padding: 20px;
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    display: none;
}

.profile-section input,
.profile-section textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

.profile-section button,
.settings-section button {
    background-color: #007BFF;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.profile-section button:hover,
.settings-section button:hover {
    background-color: #0056b3;
}

.profile-pic-preview {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 50%;
    margin-top: 15px;
}

@keyframes fadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}