/* AutoBlog 通用样式 - 现代设计系统（主题变量 / 排版 / 导航 / 卡片 / 组件）
   保留全部历史类名以兼容仪表盘；新增设计令牌与现代化样式。 */

/* ===== 设计令牌 ===== */
:root {
    /* 背景与表面 */
    --bg: #f6f7f9;
    --bg-elevated: #ffffff;
    --bg-card: #ffffff;
    --bg-subtle: #eef1f5;
    /* 文本 */
    --text: #1f2937;
    --text-muted: #6b7280;
    --text-faint: #9ca3af;
    /* 边框与分割 */
    --border: #e5e7eb;
    --border-strong: #d1d5db;
    /* 主色（靛蓝） */
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --accent-soft: #eef2ff;
    --accent-contrast: #ffffff;
    /* 代码 */
    --code-bg: #0f172a;
    --code-text: #e2e8f0;
    --inline-code-bg: #f1f5f9;
    /* 引用 */
    --blockquote-bg: #f8fafc;
    --blockquote-border: #4f46e5;
    /* 阴影（柔和、分层） */
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 10px 25px -5px rgba(15, 23, 42, 0.10), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 40px -12px rgba(15, 23, 42, 0.18);
    /* 状态色 */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    /* 圆角 */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    /* 过渡 */
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    /* 布局 */
    --nav-height: 64px;
    --content-width: 960px;
    --gradient-brand: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
}

[data-theme="dark"] {
    --bg: #0b1120;
    --bg-elevated: #111827;
    --bg-card: #131c31;
    --bg-subtle: #1e293b;
    --text: #e5e7eb;
    --text-muted: #94a3b8;
    --text-faint: #64748b;
    --border: #1f2a44;
    --border-strong: #334155;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: #1e1b4b;
    --code-bg: #020617;
    --code-text: #cbd5e1;
    --inline-code-bg: #1e293b;
    --blockquote-bg: #0f172a;
    --blockquote-border: #818cf8;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.6);
    --gradient-brand: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
}

/* ===== 基础重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ===== 布局容器 ===== */
.container { max-width: var(--content-width); margin: 0 auto; padding: 20px; }
.container-wide { max-width: 1180px; margin: 0 auto; padding: 20px; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* ===== 顶部导航栏 ===== */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 200;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 0 24px;
    background: color-mix(in srgb, var(--bg-elevated) 85%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--transition), background var(--transition);
}
.site-nav.scrolled { box-shadow: var(--shadow); }
.site-nav .nav-brand {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    white-space: nowrap;
}
.site-nav .nav-brand:hover { text-decoration: none; color: var(--accent); }
.site-nav .nav-brand .brand-dot {
    display: inline-block;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--gradient-brand);
    margin-right: 8px;
    vertical-align: middle;
}
.site-nav .nav-links { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.site-nav .nav-links a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.92rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
}
.site-nav .nav-links a:hover {
    background: var(--bg-subtle);
    color: var(--text);
    text-decoration: none;
}
.site-nav .nav-spacer { flex: 1; }

/* 汉堡菜单按钮（默认隐藏，移动端显示） */
.nav-toggle {
    display: none;
    width: 40px; height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    cursor: pointer;
    align-items: center; justify-content: center;
    transition: background var(--transition), border-color var(--transition);
}
.nav-toggle:hover { background: var(--bg-subtle); border-color: var(--border-strong); }
.nav-toggle .hamburger { display: inline-flex; flex-direction: column; justify-content: center; gap: 4px; width: 18px; }
.nav-toggle .hamburger span { display: block; height: 2px; width: 18px; border-radius: 2px; background: var(--text); transition: transform var(--transition), opacity var(--transition); }
.nav-toggle[aria-expanded="true"] .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .hamburger span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动端抽屉菜单遮罩 */
.nav-overlay {
    position: fixed; inset: 0; z-index: 190;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.site-nav .nav-search {
    position: relative;
    display: flex;
    align-items: center;
}
.site-nav .nav-search input {
    width: 220px;
    padding: 8px 14px 8px 34px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-subtle);
    color: var(--text);
    font-size: 0.88rem;
    transition: width var(--transition), border-color var(--transition), background var(--transition);
}
.site-nav .nav-search input:focus {
    outline: none;
    width: 280px;
    border-color: var(--accent);
    background: var(--bg-elevated);
}
.site-nav .nav-search::before {
    content: "🔍";
    position: absolute;
    left: 12px;
    font-size: 0.8rem;
    opacity: 0.6;
    pointer-events: none;
}
.site-nav .nav-search .search-results {
    top: calc(100% + 8px);
    left: 0;
    right: auto;
    width: 320px;
    max-width: 90vw;
}

/* 顶部固定按钮（主题/语言/回顶） */
.theme-toggle, .lang-toggle, .back-to-top {
    position: fixed; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 50%; width: 40px; height: 40px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    z-index: 100; box-shadow: var(--shadow); color: var(--text);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.theme-toggle:hover, .lang-toggle:hover, .back-to-top:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.theme-toggle { top: 12px; right: 16px; font-size: 1.1em; z-index: 210; }
.lang-toggle { top: 12px; right: 62px; font-size: 0.8em; font-weight: 600; z-index: 210; }
.back-to-top { bottom: 24px; right: 24px; font-size: 1.2em; display: none; opacity: 0; }
.back-to-top.visible { display: flex; opacity: 1; animation: fadeUp 0.25s ease; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ===== 标签 / 徽章 ===== */
.tag {
    display: inline-block; background: var(--bg-subtle); color: var(--text-muted);
    padding: 3px 10px; border-radius: 999px; font-size: 0.78em; font-weight: 500;
    margin-right: 6px; transition: background var(--transition), color var(--transition);
}
.tag a { color: inherit; text-decoration: none; }
.tag a:hover { text-decoration: none; }
.tag:hover { background: var(--accent-soft); color: var(--accent); }

.category-badge {
    display: inline-block; padding: 3px 12px; border-radius: 999px;
    font-size: 0.75em; font-weight: 600; letter-spacing: 0.01em;
}
.cat-tech-review { background: #dcfce7; color: #15803d; }
.cat-daily-thought { background: #dbeafe; color: #1d4ed8; }
.cat-issue { background: #ffedd5; color: #c2410c; }
.cat-weekly-digest { background: #f3e8ff; color: #7e22ce; }
.cat-learning-path { background: #cffafe; color: #0e7490; }
.cat-knowledge { background: #ecfccb; color: #4d7c0f; }
.cat-direct-digest { background: #fef3c7; color: #b45309; }

[data-theme="dark"] .cat-tech-review { background: #14532d; color: #86efac; }
[data-theme="dark"] .cat-daily-thought { background: #1e3a8a; color: #93c5fd; }
[data-theme="dark"] .cat-issue { background: #7c2d12; color: #fdba74; }
[data-theme="dark"] .cat-weekly-digest { background: #581c87; color: #d8b4fe; }
[data-theme="dark"] .cat-learning-path { background: #155e75; color: #67e8f9; }
[data-theme="dark"] .cat-knowledge { background: #365314; color: #bef264; }
[data-theme="dark"] .cat-direct-digest { background: #78350f; color: #fcd34d; }

/* 知识库术语提示 */
.kb-tooltip { border-bottom: 1px dashed var(--accent); cursor: help; position: relative; }
.kb-tooltip:hover::after {
    content: attr(data-def); position: absolute; bottom: 100%; left: 50%;
    transform: translateX(-50%); background: var(--bg-card); border: 1px solid var(--border);
    padding: 8px 12px; border-radius: var(--radius-sm); font-size: 0.85em; white-space: normal;
    max-width: 300px; z-index: 10; box-shadow: var(--shadow-lg);
}

/* 置顶徽章 */
.pinned-badge {
    background: linear-gradient(135deg, #f59e0b, #f97316); color: #fff;
    padding: 2px 10px; border-radius: 999px; font-size: 0.7em; font-weight: 700;
    margin-left: 8px; box-shadow: 0 2px 6px rgba(245, 158, 11, 0.35);
}

/* 评论区 */
.comment-section { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border); }

/* 页脚 */
footer {
    text-align: center; padding: 40px 0 30px; color: var(--text-muted);
    font-size: 0.86em; border-top: 1px solid var(--border); margin-top: 60px;
}
footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

/* 登录表单 */
.login-form {
    max-width: 420px; margin: 48px auto; background: var(--bg-card);
    border-radius: var(--radius-lg); padding: 36px; box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}
.login-form h2 { text-align: center; margin-bottom: 24px; color: var(--text); font-size: 1.5rem; }
.login-form label { display: block; margin-bottom: 6px; color: var(--text-muted); font-size: 0.9em; font-weight: 500; }
.login-form input[type="text"], .login-form input[type="password"] {
    width: 100%; padding: 12px 14px; border: 1px solid var(--border);
    border-radius: var(--radius); background: var(--bg); color: var(--text); margin-bottom: 18px;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.login-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.login-form button {
    width: 100%; padding: 12px; background: var(--accent); color: var(--accent-contrast);
    border: none; border-radius: var(--radius); cursor: pointer; font-size: 1em; font-weight: 600;
    transition: background var(--transition), transform var(--transition);
}
.login-form button:hover { background: var(--accent-hover); transform: translateY(-1px); }
.login-error { color: var(--danger); text-align: center; margin-bottom: 12px; font-size: 0.9em; }

/* 审核表格 */
.review-table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.review-table th, .review-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
.review-table th { background: var(--bg-subtle); font-weight: 600; color: var(--text); font-size: 0.9em; }
.btn-approve { background: var(--success); color: #fff; border: none; padding: 7px 16px; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.85em; font-weight: 500; transition: opacity var(--transition); }
.btn-approve:hover { opacity: 0.9; }
.btn-reject { background: var(--danger); color: #fff; border: none; padding: 7px 16px; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.85em; font-weight: 500; transition: opacity var(--transition); }
.btn-reject:hover { opacity: 0.9; }

/* 提交表单 */
.submit-form { max-width: 760px; margin: 24px auto; }
.submit-form label { display: block; margin-bottom: 6px; color: var(--text-muted); font-size: 0.9em; font-weight: 500; }
.submit-form input[type="text"], .submit-form textarea, .submit-form select {
    width: 100%; padding: 12px 14px; border: 1px solid var(--border);
    border-radius: var(--radius); background: var(--bg); color: var(--text); margin-bottom: 18px;
    font-family: inherit; transition: border-color var(--transition), box-shadow var(--transition);
}
.submit-form input:focus, .submit-form textarea:focus, .submit-form select:focus {
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.submit-form textarea { min-height: 220px; resize: vertical; line-height: 1.7; }

/* 事实核查 */
.fact-check-status { background: var(--bg-subtle); border-radius: var(--radius); padding: 18px; margin-top: 16px; }
.fact-check-status h4 { color: var(--text); margin-bottom: 10px; }
.fact-check-item { padding: 10px 0; border-bottom: 1px solid var(--border); }
.confidence-high { color: var(--success); }
.confidence-medium { color: var(--warning); }
.confidence-low { color: var(--danger); }

/* 版本徽章 */
.version-badge {
    display: inline-block; background: var(--bg-subtle); color: var(--text-muted);
    padding: 4px 12px; border-radius: 999px; font-size: 0.82em; margin-left: 10px;
}
.update-available { background: #dcfce7; color: #15803d; padding: 4px 12px; border-radius: 999px; font-size: 0.82em; margin-left: 8px; }
[data-theme="dark"] .update-available { background: #14532d; color: #86efac; }

/* Cookie 同意条 */
.cookie-consent {
    position: fixed; bottom: 0; left: 0; right: 0; background: var(--bg-card);
    border-top: 1px solid var(--border); padding: 16px 24px;
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    z-index: 1000; box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
    animation: fadeUp 0.3s ease;
}
.cookie-consent p { margin: 0; font-size: 0.9em; color: var(--text); }
.cookie-consent button {
    padding: 10px 24px; background: var(--accent); color: var(--accent-contrast);
    border: none; border-radius: var(--radius-sm); cursor: pointer; white-space: nowrap; font-weight: 500;
    transition: background var(--transition);
}
.cookie-consent button:hover { background: var(--accent-hover); }

/* 搜索组件（兼容旧 .search-widget，同时支持导航内搜索） */
.search-widget { display: inline-flex; align-items: center; gap: 8px; margin-left: 16px; position: relative; }
.search-widget input {
    padding: 8px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--bg); color: var(--text); font-size: 0.9em; width: 200px;
}
.search-widget button {
    padding: 8px 16px; background: var(--accent); color: var(--accent-contrast);
    border: none; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.9em; font-weight: 500;
}
.search-results {
    display: none; list-style: none; position: absolute; top: 100%; left: 0;
    background: var(--bg-card); border: 1px solid var(--border); padding: 8px;
    border-radius: var(--radius); z-index: 99; max-width: 320px; margin-top: 6px;
    box-shadow: var(--shadow-lg);
}
.search-results li { padding: 8px 10px; border-radius: var(--radius-sm); transition: background var(--transition); }
.search-results li:hover, .search-results li[aria-selected="true"] { background: var(--bg-subtle); }
.search-results li:last-child { border-bottom: none; }
.search-results li a { color: var(--text); }
.search-results li a:hover { color: var(--accent); text-decoration: none; }
.search-results .search-item { display: flex; flex-direction: column; gap: 2px; }
.search-results .search-title { color: var(--text); font-weight: 600; font-size: 0.9rem; }
.search-results .search-meta { display: flex; align-items: center; gap: 8px; font-size: 0.76rem; color: var(--text-faint); }
.search-results .search-summary {
    color: var(--text-muted); font-size: 0.8rem; line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.search-results mark { background: var(--accent-soft); color: var(--accent); border-radius: 2px; padding: 0 1px; }
.search-results .search-empty { color: var(--text-faint); font-size: 0.85rem; padding: 10px; text-align: center; }

/* 分享按钮 */
.share-buttons {
    margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border);
    display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
}
.share-buttons span { font-size: 0.9em; color: var(--text-muted); font-weight: 500; }
.share-buttons a, .share-buttons button {
    display: inline-flex; align-items: center; padding: 8px 16px; border-radius: var(--radius-sm);
    color: #fff; font-size: 0.85em; text-decoration: none; font-weight: 500;
    transition: transform var(--transition), opacity var(--transition);
}
.share-buttons a:hover, .share-buttons button:hover { transform: translateY(-2px); opacity: 0.92; text-decoration: none; }
.share-btn-twitter { background: #1da1f2; }
.share-btn-facebook { background: #1877f2; }
.share-btn-linkedin { background: #0077b5; }
.share-btn-copy { background: var(--accent); cursor: pointer; border: none; }

/* 滚动渐显（正向渐进增强：无 JS 时默认可见，有 JS 时才隐藏并触发动画） */
.reveal { opacity: 1; transform: none; transition: opacity 0.5s ease, transform 0.5s ease; }
html.js .reveal { opacity: 0; transform: translateY(16px); }
html.js .reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    body { font-size: 15px; }
    .container, .container-wide { padding: 16px; }
    .site-nav { padding: 0 16px; gap: 10px; }
    /* 移动端：导航链接收入抽屉，显示汉堡按钮 */
    .site-nav .nav-links {
        display: flex; flex-direction: column; gap: 4px;
        position: fixed; top: 0; right: 0; bottom: 0;
        width: min(280px, 82vw);
        margin: 0; padding: calc(var(--nav-height) + 12px) 16px 24px;
        background: var(--bg-elevated);
        border-left: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        transform: translateX(100%);
        transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 195;
        overflow-y: auto;
    }
    .site-nav .nav-links.open { transform: translateX(0); }
    .site-nav .nav-links a { padding: 12px 14px; font-size: 1rem; border-radius: var(--radius); }
    .nav-toggle { display: inline-flex; }
    .site-nav .nav-search input { width: 140px; }
    .site-nav .nav-search input:focus { width: 180px; }
    .theme-toggle { right: 12px; }
    .lang-toggle { right: 56px; }
    .cookie-consent { flex-direction: column; align-items: stretch; }
}

@media (max-width: 480px) {
    .site-nav .nav-search input { width: 110px; }
    .site-nav .nav-search input:focus { width: 150px; }
}

/* ===== 无障碍：键盘焦点可见 ===== */
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ===== 动效偏好：降低动画 ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    html { scroll-behavior: auto; }
}