/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
    /* 默认主题 (Default Blue) */
    --primary-color: #4a90e2;
    --primary-hover: #357abd;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-muted: #7f8c8d;
    --border-color: #f0f0f0;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --border-radius: 12px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

/* 主题变量定义 */
[data-theme="sakura"] {
    --primary-color: #e91e63;
    --primary-hover: #c2185b;
    --bg-color: #fce4ec;
}

[data-theme="ocean"] {
    --primary-color: #009688;
    --primary-hover: #00796b;
    --bg-color: #e0f2f1;
}

[data-theme="forest"] {
    --primary-color: #4caf50;
    --primary-hover: #388e3c;
    --bg-color: #e8f5e9;
}

/* 夜间模式覆盖 */
body.dark-mode {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #333333;
    --navbar-bg: rgba(30, 30, 30, 0.95);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    padding-top: 70px;
    transition: background-color 0.3s, color 0.3s;
}

/* Navbar */
.navbar {
    background: var(--navbar-bg) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
}

.nav-link {
    color: var(--text-main) !important;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.3s;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    font-weight: 600;
    color: var(--text-main);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: transparent;
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    font-weight: 600;
    color: var(--text-main);
}

/* List Groups - 增强选择器权重以修复移动端问题 */
.list-group-item,
a.list-group-item,
.list-group-item-action {
    background-color: var(--card-bg) !important; /* 强制覆盖 Bootstrap 默认白色 */
    color: var(--text-main) !important;        /* 强制覆盖 Bootstrap 文字颜色 */
    border: none;
    border-bottom: 1px solid var(--border-color) !important; /* 强制边框颜色 */
    padding: 1.2rem 1.5rem;
    transition: background-color 0.2s;
}

.list-group-item:hover, 
.list-group-item:focus, 
.list-group-item:active,
.list-group-item-action:hover, 
.list-group-item-action:focus,
.list-group-item-action:active {
    background-color: rgba(0,0,0,0.02) !important; /* Light hover effect */
    color: var(--text-main) !important;
    border-color: var(--border-color) !important;
}

body.dark-mode .list-group-item:hover, 
body.dark-mode .list-group-item:focus, 
body.dark-mode .list-group-item:active,
body.dark-mode .list-group-item-action:hover, 
body.dark-mode .list-group-item-action:focus,
body.dark-mode .list-group-item-action:active {
    background-color: rgba(255,255,255,0.05) !important;
    color: var(--text-main) !important;
}

/* 修复广告贴等使用 bg-light 在夜间模式下的问题 */
body.dark-mode .list-group-item.bg-light {
    background-color: rgba(255,255,255,0.08) !important;
    border-left-color: #ffc107 !important; /* 保持广告黄边 */
}

/* Buttons */
.btn {
    border-radius: 8px;
    padding: 0.5rem 1.2rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Form Elements in Dark Mode */
body.dark-mode .form-control, body.dark-mode .form-select {
    background-color: #2d2d2d;
    border-color: #444;
    color: #e0e0e0;
}
body.dark-mode .form-control:focus {
    background-color: #333;
    border-color: var(--primary-color);
}

/* Utilities */
.text-gradient {
    background: linear-gradient(45deg, var(--primary-color), #9013fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.avatar-placeholder {
    width: 32px;
    height: 32px;
    background-color: #e0e0e0;
    border-radius: 50%;
    display: inline-block;
    vertical-align: middle;
    margin-right: 8px;
}
/* Markdown内容样式 */
.markdown-content {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: #333;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* 标题 */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 1.5em;
    margin-bottom: 0.8em;
    font-weight: 600;
    line-height: 1.25;
    border-bottom: none;
    padding-bottom: 0;
}

.markdown-content h1 {
    font-size: 2em;
    margin-top: 0;
    border-bottom: 2px solid #eaecef;
    padding-bottom: 0.3em;
}

.markdown-content h2 {
    font-size: 1.5em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
}

.markdown-content h3 { font-size: 1.25em; }
.markdown-content h4 { font-size: 1.1em; }
.markdown-content h5 { font-size: 1em; }
.markdown-content h6 { font-size: 0.9em; color: #6a737d; }

/* 段落 */
.markdown-content p {
    margin-top: 0;
    margin-bottom: 1em;
}

/* 链接 */
.markdown-content a {
    color: #0366d6;
    text-decoration: none;
    background-color: transparent;
}

.markdown-content a:hover {
    text-decoration: underline;
}

.markdown-content a:not([href]):not([tabindex]) {
    color: inherit;
    text-decoration: none;
}

/* 列表 */
.markdown-content ul,
.markdown-content ol {
    padding-left: 2em;
    margin-top: 0;
    margin-bottom: 1em;
}

.markdown-content ul ul,
.markdown-content ul ol,
.markdown-content ol ul,
.markdown-content ol ol {
    margin-top: 0.25em;
    margin-bottom: 0.25em;
}

.markdown-content li {
    margin-bottom: 0.25em;
}

.markdown-content li > p {
    margin-top: 0.5em;
    margin-bottom: 0.5em;
}

/* 引用块 */
.markdown-content blockquote {
    padding: 0 1em;
    color: #6a737d;
    border-left: 0.25em solid #dfe2e5;
    margin: 1em 0;
}

.markdown-content blockquote > :first-child {
    margin-top: 0;
}

.markdown-content blockquote > :last-child {
    margin-bottom: 0;
}

/* 代码块和内联代码 */
.markdown-content code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: rgba(27,31,35,0.05);
    border-radius: 3px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

.markdown-content pre {
    word-wrap: normal;
    background-color: #f6f8fa;
    border-radius: 6px;
    padding: 1em;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    margin: 1em 0;
}

.markdown-content pre code {
    background-color: transparent;
    padding: 0;
    margin: 0;
    font-size: 100%;
    word-break: normal;
    white-space: pre;
    border: 0;
}

/* 表格 */
.markdown-content table {
    display: block;
    width: 100%;
    overflow: auto;
    margin: 1em 0;
    border-spacing: 0;
    border-collapse: collapse;
}

.markdown-content table th {
    font-weight: 600;
    background-color: #f6f8fa;
}

.markdown-content table th,
.markdown-content table td {
    padding: 6px 13px;
    border: 1px solid #dfe2e5;
}

.markdown-content table tr {
    background-color: #fff;
    border-top: 1px solid #c6cbd1;
}

.markdown-content table tr:nth-child(2n) {
    background-color: #f6f8fa;
}

/* 水平线 */
.markdown-content hr {
    height: 0.25em;
    padding: 0;
    margin: 1.5em 0;
    background-color: #e1e4e8;
    border: 0;
}

/* 图片 */
.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 0.5em 0;
}

/* 任务列表 */
.markdown-content .task-list-item {
    list-style-type: none;
}

.markdown-content .task-list-item-checkbox {
    margin: 0 0.2em 0.25em -1.6em;
    vertical-align: middle;
}

/* 脚注 */
.markdown-content .footnote {
    font-size: 0.875em;
    color: #6a737d;
    border-top: 1px solid #eaecef;
    margin-top: 2em;
    padding-top: 1em;
}

/* 内嵌数学公式支持 */
.markdown-content .math {
    font-size: 1.1em;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .markdown-content h1 { font-size: 1.75em; }
    .markdown-content h2 { font-size: 1.5em; }
    .markdown-content h3 { font-size: 1.25em; }
    
    .markdown-content pre {
        padding: 0.75em;
        font-size: 80%;
    }
    
    .markdown-content table {
        font-size: 0.9em;
    }
    
    .markdown-content table th,
    .markdown-content table td {
        padding: 4px 8px;
    }
}

/* 暗色主题支持 */
[data-theme="dark"] .markdown-content {
    color: #e1e4e8;
}

[data-theme="dark"] .markdown-content h1 {
    border-bottom-color: #3d444d;
}

[data-theme="dark"] .markdown-content h2 {
    border-bottom-color: #3d444d;
}

[data-theme="dark"] .markdown-content a {
    color: #58a6ff;
}

[data-theme="dark"] .markdown-content blockquote {
    color: #8b949e;
    border-left-color: #3d444d;
}

[data-theme="dark"] .markdown-content code {
    background-color: rgba(110,118,129,0.4);
}

[data-theme="dark"] .markdown-content pre {
    background-color: #161b22;
}

[data-theme="dark"] .markdown-content table th {
    background-color: #161b22;
}

[data-theme="dark"] .markdown-content table th,
[data-theme="dark"] .markdown-content table td {
    border-color: #3d444d;
}

[data-theme="dark"] .markdown-content table tr {
    background-color: #0d1117;
    border-top-color: #3d444d;
}

[data-theme="dark"] .markdown-content table tr:nth-child(2n) {
    background-color: #161b22;
}

[data-theme="dark"] .markdown-content hr {
    background-color: #3d444d;
}
/* 列表页标题样式 */
.list-group-item h5 {
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2; /* 最多显示2行 */
    -webkit-box-orient: vertical;
}

/* 标题标记样式 */
.title-markdown-hint {
    font-size: 0.8em;
    color: #6c757d;
    background-color: #f8f9fa;
    padding: 2px 6px;
    border-radius: 4px;
    border-left: 3px solid #0d6efd;
    margin-left: 5px;
}

/* 预览内容样式 */
.content-preview {
    color: #6c757d;
    font-size: 0.9em;
    line-height: 1.5;
    margin-top: 5px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .list-group-item h5 {
        -webkit-line-clamp: 1;
        font-size: 1rem;
    }
    
    .content-preview {
        font-size: 0.85em;
    }
}