#floatingIcon {
    position: fixed;
    bottom: 20px;
    right: 20px;
    cursor: move;
    width: 80px;
    height: 80px;
}

#floatingIcon img {
    width: 80px;
    height: 80px;
}

.chat-overlay {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 400px;
    height: 600px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    z-index: 1000;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    padding: 15px !important;
    background: #f5f5f5 !important;
    border-radius: 10px 10px 0 0 !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
}

.chat-header h3 {
    margin: 0 !important;
    padding: 0 !important;
    font-size: 16px !important;
    color: #333 !important;
}

.chat-overlay .close-chat {
    border: none !important;
    background: none !important;
    font-size: 20px !important;
    cursor: pointer !important;
    padding: 5px !important;
    color: #666 !important;
    line-height: 1 !important;
    margin: 0 !important;
}

.chat-overlay .chat-input-container {
    padding: 15px !important;
    border-top: 1px solid #eee !important;
    background: white !important;
    margin: 0 !important;
}

.chat-overlay .chat-input {
    width: 100% !important;
    padding: 10px !important;
    border: 1px solid #ddd !important;
    border-radius: 5px !important;
    margin-bottom: 10px !important;
    resize: none !important;
    font-size: 14px !important;
    line-height: 1.5 !important;
    box-sizing: border-box !important;
}

.chat-overlay .send-message {
    width: 100% !important;
    padding: 10px !important;
    background: #1976d2 !important;
    color: white !important;
    border: none !important;
    border-radius: 5px !important;
    cursor: pointer !important;
    font-size: 14px !important;
    line-height: 1.5 !important;
    height: auto !important;
    margin: 0 !important;
}

.chat-overlay .send-message:hover {
    background: #1565c0 !important;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.message {
    margin: 10px 0;
    padding: 10px;
    border-radius: 10px;
    max-width: 80%;
}

.message.user {
    background: #e3f2fd;
    margin-left: auto;
}

.message.assistant {
    background: #f5f5f5;
    margin-right: auto;
}

.message.system {
    background: #ffebee;
    text-align: center;
    margin: 10px auto;
}


.study-buttons {
    display: flex;
    justify-content: space-around;
    padding: 10px;
    border-bottom: 1px solid #eee;
}

.study-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    background-color: #4a90e2;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s;
}

.study-btn:hover {
    background-color: #357abd;
}

.exercise-area {
    padding: 15px;
}

.question-area {
    margin-bottom: 15px;
    padding: 10px;
    background-color: #f5f5f5;
    border-radius: 4px;
}

.answer-input {
    width: 100%;
    min-height: 100px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 10px;
    resize: vertical;
}

.button-group {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.submit-answer, .back-to-chat {
    flex: 1;
    padding: 8px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.submit-answer {
    background-color: #4a90e2;
    color: white;
}

.back-to-chat {
    background-color: #f5f5f5;
    color: #333;
}

.question-item {
    margin-bottom: 20px;
    padding: 10px;
    background: #f5f5f5;
    border-radius: 5px;
}

.word-item {
    margin-bottom: 15px;
    padding: 10px;
    background: #f0f7ff;
    border-radius: 5px;
}

.play-audio {
    background: #4a90e2;
    color: white;
    border: none;
    padding: 5px 15px;
    border-radius: 3px;
    cursor: pointer;
    margin-bottom: 10px;
}

.play-audio:hover {
    background: #357abd;
}

.example-sentence {
    color: #666;
    margin: 5px 0;
}

.sentence-translation {
    color: #888;
    font-style: italic;
}

.evaluation-result {
    background: #f0f7ff;
    padding: 15px;
    border-radius: 5px;
    margin-top: 10px;
}

.evaluation-result h4 {
    margin-top: 0;
    color: #333;
}

.loading, .error-message {
    padding: 20px;
    text-align: center;
    color: #666;
}

.error-message {
    color: #d32f2f;
}

.exercise-item {
    margin-bottom: 15px;
    padding: 15px;
    background: #f5f5f5;
    border-radius: 8px;
}

.feedback {
    margin-top: 10px;
    padding: 10px;
    border-radius: 4px;
    display: none;
}

.feedback.correct {
    background-color: #dff0d8;
    color: #3c763d;
}

.feedback.incorrect {
    background-color: #f2dede;
    color: #a94442;
}

.submit-answer {
    background: #1976d2;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 10px;
}

.evaluation-summary {
    margin-top: 20px;
    padding: 15px;
    background: #e8f4fd;
    border-radius: 8px;
}