/* 定义 CSS 变量, 新的优化配色方案 */
:root {
    --primary-color: #00a99d;      /* 主按钮及强调色 - 绿松石色 */
    --primary-hover: #008c82;      /* 悬停时的深绿松石色 */
    --background-light: #f0f7f6;    /* 较柔和的浅色背景 */
    --border-color: #dde6e5;       /* 统一边框色 */
    --text-color: #333;            /* 主要文字颜色 */
    --title-color: #008c82;        /* 标题及提示文字颜色 */
    --subtitle-color: #666;        /* 副标题及提示文字颜色 */
    --green-accent: #00a99d;       /* 新增概念 "新增" 按钮色 */
    --red-accent: #666;            /* 新增概念 "取消" 按钮色 */
}

@font-face {
    font-family: 'NotoSansHans-Regular';
    src: url('./NotoSansHans-Regular.otf') format('opentype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'NotoSansHans-Bold';
    src: url('./NotoSansHans-Bold.otf') format('opentype');
    font-weight: bold;
    font-style: normal;
    font-display: swap;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'NotoSansHans-Regular', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    overflow-y: auto; /* 改为 auto 允许垂直滚动 */
    overflow-x: hidden; /* 禁用水平滚动 */
    background-color: #fff;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

.container {
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 20px; /* 添加底部padding */
}

.input-section {
    padding: 15px;
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* 允许PC端input-section整体分布得更好 */
@media (min-width: 769px) {
    .input-section {
        display: flex;
        flex-direction: column;
        gap: 15px;
        box-sizing: border-box;
    }
}

input[type="text"] {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
    min-width: 0; /* 防止输入框溢出 */
}

button {
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    white-space: nowrap;
}

button:hover {
    background-color: var(--primary-hover);
}

button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.header {
    padding: 20px 0;
    text-align: left;
}

.header h1 {
    margin: 0;
    font-family: 'NotoSansHans-Bold', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 30px;
    color: var(--title-color);
    line-height: 1;
}

.modal-title {
    margin: 0 0 10px 0;
    font-size: 16px;
    color: #333;
    text-align: left;
    line-height: 1.2;
}

.modal-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.header .subtitle {
    margin: 0 0 0 0;
    font-size: 14px;
    color: var(--subtitle-color);
    margin-left: 10px;
    margin-bottom: 1px;
}

.main-content {
    display: flex;
    gap: 20px;
    flex: 1;
    min-height: 0;
}

#network-container {
    position: relative;
    width: 100%;
    height: 100%; /* 或者其他具体高度 */
    min-height: 400px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;  /* 修复绘图区右侧溢出问题 */
    box-sizing: border-box; /* 使得边框在内部 */
}

#network {
    width: 100%;
    height: 100%;
}

#network-loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(245, 245, 245, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

#network-loading img {
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

#info-box {
    flex: 1;
    min-height: 150px !important; /* 强制最小高度 */
    padding: 15px;
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow-y: auto;
    font-size: 16px;
    line-height: 1.6;
}

.progress-container {
    display: none;
    height: 8px;
    background-color: #f0f0f0;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    margin-top: 10px;
    overflow: hidden;
}

/* 针对移动端（屏幕宽度不超过768px）：宽度为network-container的70%，居中显示 */
@media (max-width: 768px) {
    .progress-container {
        width: 70%;
        margin: 10px auto 0;
    }
}

/* 针对PC端（屏幕宽度769px及以上）：宽度为network-container的70%，居中显示 */
@media (min-width: 769px) {
    .progress-container {
        width: 50%;
        margin: 10px auto 0;
    }
}

/* 更新内部进度条样式 */
.progress-bar {
    width: 0%;
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
    border-radius: 8px;
}

/* 修改 ai-disclaimer，移除固定高度 */
.ai-disclaimer {
    width: 100%;
    padding: 5px 0;  /* 减小上下padding */
    margin: 5px 0;   /* 添加小的外边距 */
    font-size: 12px;
    color: var(--subtitle-color);
    text-align: center;
    line-height: 1.2; /* 减小行高 */
}

.input-row {
    display: flex;
    gap: 15px;
    width: 100%;
    align-items: center;
    justify-content: space-between;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group label {
    font-size: 16px;
    color: var(--text-color);
    white-space: nowrap;
}

.input-group input[type="text"] {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

.number-input {
    white-space: nowrap;
}

.number-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.number-btn {
    width: 28px;
    height: 28px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f0f0f0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 18px;
    color: var(--text-color);
    transition: all 0.2s ease;
}

.number-btn:hover {
    background-color: #e0e0e0;
}

.number-btn:active {
    background-color: #d0d0d0;
}

#concept-count {
    width: 40px;
    text-align: center;
    padding: 4px 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    margin: 0 2px;
}

.range-hint {
    color: var(--subtitle-color);
    font-size: 14px;
    white-space: nowrap;
}

#generate-btn {
    align-self: center;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    white-space: nowrap;
    max-width: 100%;
    box-sizing: border-box;
}

.right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* PC端限制总高度为1800px */
@media (min-width: 769px) {
    .container {
        height: 98vh;
        max-height: 1000px;
    }
    
    /* 优化输入区域布局 */
    .input-row {
        display: flex;
        gap: 15px;
        width: 100%;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap; /* 允许换行 */
    }
    
    .input-group:first-child {
        flex: 2;
    }
    
    .number-input {
        flex: 1;
        width: auto;
        min-width: 180px;
    }
    
    .input-group input[type="text"] {
        width: 100%;
        max-width: none;
    }
    
    #generate-btn {
        width: 100%; /* 与学习主题输入框等宽 */
        box-sizing: border-box;
        margin-top: 15px;
        align-self: stretch; /* 填满父容器的宽度 */
    }

    #download-btn,
    .feedback-btn {
        width: auto;
        padding: 0 16px;
        gap: 8px;
    }

    .button-text {
        display: inline-block;
    }
}

/* 手机端相关优化 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
        height: 97vh;
        display: flex;
        flex-direction: column;
    }

    .header {
        padding: 10px 0;
        padding-top: 0px;
        flex: 0 0 auto;
    }

    .main-content {
        display: flex;
        flex-direction: column;
        padding: 0;
        gap: 15px;
        flex: 1;
        min-height: 0;
        overflow: hidden;
    }
    
    /* 将 .right-panel 的子元素"抬平"到 .main-content 里 */
    .right-panel {
        display: contents;
    }
    
    /* 重新排序 .main-content 下的三个部分：
       1. 输入区域放最前（order:1）
       2. 网络图放中间（order:2）
       3. info-box 放最后（order:3）
    */
    .input-section {
        order: 1;
        width: 100%;
        box-sizing: border-box;
        padding: 12px;
        flex: 0 0 auto;
    }
    
    #network-container {
        order: 2;
        width: 100%;
        flex: 2;
        min-height: 300px;
    }
    
    #info-box {
        order: 3;
        width: 100%;
        box-sizing: border-box;
        flex: 0 0 150px; /* 固定高度 */
        min-height: 150px !important;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    #generate-btn {
        width: 100%;
        margin: 15px auto 0;
        display: block;
    }
    
    .input-row {
        flex-direction: column;
        gap: 12px;
    }
    
    .input-group {
        width: 100%;
    }

    #download-btn,
    .feedback-btn {
        width: 36px;
        height: 36px;
        padding: 0;
    }

    .button-text {
        display: none;
    }
}

@media (max-height: 680px) {
    .container {
        padding: 15px;
        height: auto;
        min-height: 97vh;
        display: flex;
        flex-direction: column;
        overflow-y: auto;
    }

    .main-content {
        display: flex;
        flex-direction: column;
        padding: 0;
        gap: 15px;
        flex: 0 1 auto;
        min-height: 0;
        overflow: visible;
    }
    
    /* 将 .right-panel 的子元素"抬平"到 .main-content 里 */
    .right-panel {
        display: contents;
    }
    
    /* 重新排序 .main-content 下的三个部分 */
    .input-section {
        order: 1;
        width: 100%;
        box-sizing: border-box;
        padding: 12px;
        flex: 0 0 auto;
    }
    
    #network-container {
        order: 2;
        width: 100%;
        height: 300px;
        min-height: 300px;
        flex: 0 0 auto;
    }
    
    #info-box {
        order: 3;
        width: 100%;
        box-sizing: border-box;
        flex: 0 0 auto;
        min-height: 150px !important;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* 下载按钮和反馈按钮的通用样式 */
#download-btn,
.feedback-btn {
    position: relative;
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

#download-btn i,
.feedback-btn i {
    font-size: 16px;
}

/* 下载按钮位置 */
#download-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    z-index: 10;
}

/* 反馈按钮容器 */
.feedback-buttons {
    position: absolute;
    top: 66px;  /* 下载按钮高度(36px) + 间距(10px) + 顶部间距(20px) */
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 10;
}

/* 调整按钮顺序 */
#like-btn {
    order: 2;  /* 放到第二位 */
}

#dislike-btn {
    order: 1;  /* 放到第一位 */
}

/* 图标样式 */
#download-btn i,
.feedback-btn i,
.search-graph-btn i {
    font-size: 16px;  /* 减小图标尺寸 */
}

/* PC端样式 */
@media (min-width: 769px) {
    #download-btn,
    .feedback-btn {
        width: 120px; /* 固定宽度 */
        padding: 0 16px;
    }

    .button-text {
        display: inline-block;
        margin-left: 8px;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    #download-btn,
    .feedback-btn {
        width: 36px;
    }

    .button-text {
        display: none;
    }

    #download-btn {
        top: 10px;
        right: 10px;
    }

    .feedback-buttons {
        top: 58px;
        right: 10px;
        gap: 10px;
    }
}

/* 悬停效果 */
#download-btn:hover,
.feedback-btn:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* 修改下载按钮样式，使其固定在网络图区域右下角 */
#download-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: all 0.2s ease;
}


/* 统一图标大小 */
#download-btn i,
.feedback-btn i,
.search-graph-btn i {
    font-size: 16px;  /* 减小图标尺寸 */
}

/* 移动端适配 */
@media (max-width: 768px) {
    #download-btn {
        top: 10px;
        right: 10px;
        padding: 6px 12px;
        font-size: 12px;
    }
    
    #download-btn,
    .feedback-btn {
        width: 28px;  /* 移动端更小的尺寸 */
        height: 28px;
    }
    
    #download-btn i,
    .feedback-btn i,
    .search-graph-btn i {
        font-size: 14px;  /* 移动端更小的图标 */
    }
}

/* PC端按钮样式 */
@media (min-width: 769px) {
    #download-btn,
    .feedback-btn {
        width: auto;
        padding: 0 16px;
        gap: 8px;
    }

    .button-text {
        display: inline-block;
    }
}

/* 移动端按钮样式 */
@media (max-width: 768px) {
    #download-btn,
    .feedback-btn {
        width: 36px;
        height: 36px;
        padding: 0;
    }

    .button-text {
        display: none;
    }
}

/* 通用按钮样式 */
#download-btn,
.feedback-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 169, 157, 0.9); /* 修改为绿松石色 */
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
    height: 36px;
}

#download-btn i,
.feedback-btn i,
.search-graph-btn i {
    font-size: 16px;
}

.button-text {
    white-space: nowrap;
    font-size: 14px;
}

/* 按钮禁用状态样式 */
#download-btn:disabled,
.feedback-btn:disabled {
    background-color: rgba(0, 169, 157, 0.4) !important; /* 修改为绿松石色 */
    cursor: not-allowed;
    pointer-events: none; /* 禁止所有鼠标/触摸事件 */
}

/* 移动端特别处理 */
@media (max-width: 768px) {
    .feedback-btn:disabled {
        opacity: 0.5; /* 增加透明度以更明显地显示禁用状态 */
        -webkit-tap-highlight-color: transparent; /* 移除移动端点击高亮 */
    }
    
    .feedback-btn {
        -webkit-tap-highlight-color: transparent;
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        user-select: none;
    }
}

/* 新增概念模态弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;  /* 改为纵向排列 */
    gap: 15px;
}

.modal-content input {
    padding: 10px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.modal-add-btn {
    padding: 10px 20px;
    background-color: var(--green-accent);
    border: none;
    border-radius: 4px;
    color: white;
    cursor: pointer;
}

.modal-cancel-btn {
    padding: 10px 20px;
    background-color: var(--red-accent);
    border: none;
    border-radius: 4px;
    color: white;
    cursor: pointer;
}

/* 新增按钮面板样式，统一排列所有操作按钮 */
#button-panel {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 统一按钮基础样式 */
#button-panel button {
    width: auto;
    min-height: 36px;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: all 0.2s ease;
}

/* 可见按钮的flex布局 */
#button-panel button:not(#search-graph-btn),
#button-panel #search-graph-btn[style*="display: block"] {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* 搜寻图谱按钮默认隐藏 */
#button-panel #search-graph-btn {
    display: block;
}

/* 按钮顺序控制 */
#download-btn { order: 1; }
#search-graph-btn { order: 2; }
#add-concept-btn { order: 3; }
#regenerate-btn { order: 4; }
#like-btn { order: 5; }

/* 移动端适配 */
@media (max-width: 768px) {
    #button-panel {
        top: 10px;
        right: 10px;
        gap: 8px;
    }

    #button-panel button {
        width: 36px;
        min-height: 36px;
        padding: 0;
    }

    #button-panel button .button-text {
        display: none;
    }

    #button-panel button i {
        font-size: 16px;
    }
}

/* 统一按钮基础样式 */
#download-btn,
#search-graph-btn,
#add-concept-btn,
#dislike-btn,
#like-btn {
    position: absolute;
    right: 20px;
    z-index: 10;
    width: 120px;
    height: 36px;
    padding: 0;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: all 0.2s ease;
}

/* 按钮位置设置 - 统一使用 10px 间距 */
#download-btn {
    top: 10px;
}

#search-graph-btn {
    top: 56px; /* 10px + 36px + 10px */
}

#add-concept-btn {
    top: 102px; /* 56px + 36px + 10px */
}

#dislike-btn {
    top: 148px; /* 102px + 36px + 10px */
}

#like-btn {
    top: 194px; /* 148px + 36px + 10px */
}

/* 移除 feedback-buttons 的定位 */
.feedback-buttons {
    position: static;
}

/* 移动端适配 */
@media (max-width: 768px) {
    #download-btn,
    #search-graph-btn,
    #add-concept-btn,
    #dislike-btn,
    #like-btn {
        width: 36px;
        right: 10px;
    }

    .button-text {
        display: none;
    }

    i {
        font-size: 16px;
    }
}

/* 添加预览遮罩层样式 */
.preview-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    cursor: pointer;
}

.preview-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    cursor: default;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .preview-image {
        max-width: 95%;
        max-height: 95%;
    }
}

/* 修改全局触摸行为，允许垂直滚动 */
* {
    -webkit-tap-highlight-color: transparent;
    touch-action: pan-y; /* 允许垂直滚动，但禁用其他触摸行为 */
}

/* 允许特定元素的触摸行为 */
input, textarea, #network, button {
    touch-action: manipulation; /* 恢复这些元素的基本触摸操作 */
    -webkit-user-select: text;
    user-select: text;
}

/* 为其他按钮添加 hover 效果 */
#search-graph-btn:hover,
#add-concept-btn:hover,
#dislike-btn:hover,
#like-btn:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* 二维码弹出层样式 */
.qr-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    cursor: pointer;
}

.qr-image {
    width: 50%;
    max-width: 200px;
    height: auto;
    background-color: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* AI提示文本中的链接样式 */
.ai-disclaimer a {
    color: var(--primary-color);
    text-decoration: none;
    cursor: pointer;
}

.ai-disclaimer a:hover {
    text-decoration: underline;
}