/* 全局样式 */
:root {
    --primary-color: #4a6da7;
    --secondary-color: #73a5c6;
    --accent-color: #ffd166;
    --text-color: #333333;
    --light-text: #666666;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #4caf50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.app-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo img {
    width: 60px;
    height: 60px;
}

.logo h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.app-header h2 {
    font-size: 1.5rem;
    color: var(--light-text);
    font-weight: 400;
}

/* 主内容区样式 */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
    flex: 1;
}

/* 聊天区域 */
.chat-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 400px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.message {
    display: flex;
    margin-bottom: 20px;
}

.message.system {
    justify-content: flex-start;
}

.message.user {
    justify-content: flex-end;
}

.message-content {
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 70%;
}

.message.system .message-content {
    background-color: #eef4ff;
    border-bottom-left-radius: 4px;
}

.message.user .message-content {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.user-input {
    display: flex;
    flex-direction: column;
    padding: 15px;
    background-color: #f9f9f9;
    border-top: 1px solid var(--border-color);
}

#user-input-text {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: none;
    height: 60px;
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 10px;
}

.input-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 学习容器 */
.learning-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 20px;
}

.practice-area {
    margin-bottom: 20px;
}

.practice-module {
    background-color: #f5f9ff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.practice-module h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

/* 听写训练模块 */
.dictation-controls, .word-practice-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.dictation-input {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

#dictation-answer {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.dictation-progress {
    font-size: 0.9rem;
    color: var(--light-text);
    margin-bottom: 15px;
}

.dictation-result {
    margin-top: 15px;
    padding: 15px;
    background-color: white;
    border-radius: 8px;
    display: none;
}

/* 单词练习模块 */
.word-practice-text {
    padding: 15px;
    background-color: white;
    border-radius: 8px;
    margin-bottom: 20px;
}

.assessment-result {
    margin-top: 20px;
    padding: 15px;
    background-color: white;
    border-radius: 8px;
    display: none;
}

.score-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.score-bar {
    height: 10px;
    background-color: #e0e0e0;
    border-radius: 5px;
    margin-top: 5px;
    overflow: hidden;
}

.score-fill {
    height: 100%;
    background-color: var(--primary-color);
}

.feedback {
    margin-top: 15px;
    padding: 10px;
    background-color: #f5f5f5;
    border-radius: 6px;
}

/* 按钮样式 */
button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    outline: none;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
}

.primary-btn:hover {
    background-color: #405f9e;
}

.primary-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    background-color: white;
    border: 1px solid var(--border-color);
    padding: 8px 15px;
    border-radius: 8px;
    color: var(--text-color);
}

.action-btn:hover {
    background-color: #f5f5f5;
}

.icon-btn {
    background-color: transparent;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: 50%;
}

.icon-btn:hover {
    background-color: rgba(74, 109, 167, 0.1);
}

/* 页脚样式 */
.app-footer {
    margin-top: 40px;
    text-align: center;
    padding: 20px 0;
    color: var(--light-text);
    font-size: 0.9rem;
}

/* 响应式调整 */
@media (min-width: 768px) {
    .main-content {
        flex-direction: row;
    }
    
    .chat-container {
        flex: 1;
        height: 600px;
    }
    
    .learning-container {
        flex: 1;
        height: 600px;
        overflow-y: auto;
    }
}

@media (max-width: 767px) {
    .chat-container {
        height: 350px;
    }
    
    .dictation-input {
        flex-direction: column;
    }
    
    .dictation-input button {
        align-self: flex-end;
    }
}

/* 听力训练模块样式 */
#listening-module {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 95%;
    max-width: 700px;
    min-height: 500px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    z-index: 1001;
    padding: 30px;
}

.listening-controls {
    margin: 20px 0;
    display: flex;
    gap: 10px;
}

.listening-content {
    margin: 20px 0;
}

.listening-question {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
}

.listening-options {
    margin: 20px 0;
}

.listening-option {
    margin: 10px 0;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    cursor: pointer;
}

.listening-option:hover {
    background-color: #f5f5f5;
}

.listening-option input[type="radio"] {
    margin-right: 10px;
}

.listening-result {
    margin-top: 20px;
}

.listening-passage {
    margin-top: 20px;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 5px;
    border-left: 4px solid #4CAF50;
}

.listening-passage h4 {
    margin-top: 0;
    color: #333;
}

.listening-passage p {
    margin-top: 10px;
    line-height: 1.6;
}

/* 听力训练提示信息样式 */
.listening-tip {
    margin-top: 15px;
    padding: 10px;
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    border-radius: 4px;
}

.listening-tip p {
    margin: 0;
    color: #856404;
    font-size: 14px;
}

/* 聊天记录中的听力训练结果样式 */
.correct-option {
    color: var(--success-color);
    font-weight: bold;
}

.wrong-option {
    color: var(--error-color);
    text-decoration: line-through;
}

/* 聊天记录中的听力训练结果列表样式 */
.message-content ul {
    margin: 10px 0;
    padding-left: 20px;
}

.message-content li {
    margin-bottom: 5px;
}