/* ========================================
   博客聚合程序 - 样式表
   卡片式设计，简洁干净
   ======================================== */

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

:root {
    --primary: #4A90D9;
    --primary-dark: #357ABD;
    --success: #27AE60;
    --warning: #F39C12;
    --danger: #E74C3C;
    --bg: #F5F6FA;
    --card-bg: #FFFFFF;
    --text: #2C3E50;
    --text-secondary: #7F8C8D;
    --text-muted: #BDC3C7;
    --border: #E8ECF1;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 24px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* 头部导航 */
.site-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.site-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
}

.site-logo:hover {
    color: var(--primary);
}

.site-nav {
    display: flex;
    gap: 8px;
    align-items: center;
}

.site-nav a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
}

.site-nav a:hover {
    background: var(--bg);
    color: var(--text);
}

.admin-badge {
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text);
    padding: 4px 8px;
}

/* 主内容区 */
.site-main {
    flex: 1;
    padding: 30px 0;
}

/* Hero区域 */
.hero-section {
    text-align: center;
    padding: 40px 0 30px;
}

.hero-compact {
    padding: 20px 0 16px;
}

.hero-section h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    font-size: 14px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.hero-stats strong {
    color: var(--primary);
    font-size: 18px;
}

/* 文章列表（无图片） */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 10px 0 30px;
    max-width: 860px;
    margin: 0 auto;
}

/* 文章卡片 */
.article-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
}

.article-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

/* 无图片纯文字卡片 */
.article-card-plain {
    flex-direction: column;
}

.article-card-plain .card-body {
    padding: 20px 24px;
}

.card-body {
    padding: 16px 20px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-source {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.source-name {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    background: rgba(74, 144, 217, 0.1);
    padding: 2px 10px;
    border-radius: 20px;
}

.source-time {
    font-size: 12px;
    color: var(--text-muted);
}

.card-title {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 10px;
    flex: 1;
}

.card-title a {
    color: var(--text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-title a:hover {
    color: var(--primary);
}

.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.read-more {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

.card-date {
    font-size: 12px;
    color: var(--text-muted);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    padding: 20px 0 10px;
    flex-wrap: wrap;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

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

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

.page-btn-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.page-btn-ellipsis {
    border: none;
    background: transparent;
    cursor: default;
    pointer-events: none;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-state h2 {
    font-size: 20px;
    color: var(--text);
    margin-bottom: 8px;
}

/* 页面头部 */
.page-header {
    text-align: center;
    padding: 30px 0 20px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* 提交页面 */
.submit-page {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px 0;
}

.submit-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
}

.submit-info {
    padding: 20px 24px 0;
}

.submit-info h3 {
    font-size: 16px;
    margin-bottom: 12px;
}

.submit-info ul {
    list-style: none;
    padding: 0;
}

.submit-info li {
    padding: 5px 0;
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.submit-info li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: var(--primary);
}

.submit-info code {
    background: var(--bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--danger);
}

.submit-form {
    padding: 24px;
}

/* 表单 */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.required {
    color: var(--danger);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    background: var(--card-bg);
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    display: flex;
    gap: 10px;
    padding-top: 6px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
    font-family: inherit;
}

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

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

.btn-outline {
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
}

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

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #219A52;
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-warning:hover {
    background: #E08E0B;
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #C0392B;
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
}

/* 提示框 */
.alert {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    align-items: flex-start;
}

.alert-icon {
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.alert-success {
    background: #E8F8F0;
    border: 1px solid #A3E4BC;
}

.alert-success .alert-icon {
    background: var(--success);
    color: white;
}

.alert-error {
    background: #FDE8E8;
    border: 1px solid #F5B7B1;
}

.alert-error .alert-icon {
    background: var(--danger);
    color: white;
}

.alert-warning {
    background: #FEF3E2;
    border: 1px solid #FAD7A0;
}

.alert-warning .alert-icon {
    background: var(--warning);
    color: white;
}

.alert-content strong {
    display: block;
    margin-bottom: 4px;
    font-size: 15px;
}

.alert-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.alert-content .btn {
    margin-top: 10px;
    margin-right: 8px;
}

/* 关于页面 */
.about-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.page-content {
    line-height: 1.8;
    font-size: 15px;
}

.page-content h1 {
    font-size: 28px;
    margin: 0 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

.page-content h2 {
    font-size: 22px;
    margin: 28px 0 14px;
}

.page-content h3 {
    font-size: 18px;
    margin: 22px 0 10px;
}

.page-content p {
    margin-bottom: 14px;
}

.page-content ul, .page-content ol {
    padding-left: 24px;
    margin-bottom: 14px;
}

.page-content li {
    margin-bottom: 6px;
}

.page-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 10px 16px;
    margin: 16px 0;
    background: var(--bg);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.page-content pre {
    background: #1E1E2E;
    color: #CDD6F4;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 16px 0;
    font-size: 13px;
    line-height: 1.5;
}

.page-content code {
    background: var(--bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--danger);
}

.page-content pre code {
    background: none;
    color: inherit;
    padding: 0;
}

.page-content img {
    border-radius: var(--radius-sm);
    margin: 10px 0;
}

.page-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 24px 0;
}

.page-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* 页脚 */
.site-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* 登录页面 */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-card h1 {
    font-size: 24px;
    text-align: center;
    margin-bottom: 4px;
}

.login-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}

.login-form {
    margin-top: 20px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.login-footer a {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 管理后台 */
.admin-main {
    background: var(--bg);
}

.admin-dashboard h1,
.admin-page h1 {
    font-size: 24px;
    margin-bottom: 20px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.stat-pending .stat-number { color: var(--warning); }
.stat-approved .stat-number { color: var(--success); }
.stat-articles .stat-number { color: var(--primary); }

.admin-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.admin-section {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.admin-section h2 {
    font-size: 18px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

/* 标签页 */
.admin-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    background: var(--bg);
    padding: 4px;
    border-radius: var(--radius-sm);
}

.tab {
    padding: 8px 20px;
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition);
}

.tab:hover {
    color: var(--text);
}

.tab.active {
    background: var(--card-bg);
    color: var(--primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

/* 表格 */
.table-responsive {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.admin-table th {
    text-align: left;
    padding: 12px 16px;
    background: var(--bg);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border);
}

.admin-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.admin-table tr:hover td {
    background: #FAFBFC;
}

.admin-table .rss-url {
    max-width: 250px;
    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.action-cell {
    white-space: nowrap;
}

.action-cell .btn {
    margin-right: 4px;
}

/* 徽章 */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #E8F8F0;
    color: var(--success);
}

.badge-warning {
    background: #FEF3E2;
    color: var(--warning);
}

.badge-danger {
    background: #FDE8E8;
    color: var(--danger);
}

/* 信息网格 */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}

.info-item {
    padding: 12px 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.info-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.info-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.info-value code {
    background: #E8ECF1;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
}

/* 关于编辑器 */
.about-editor {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.about-textarea {
    width: 100%;
    min-height: 400px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    background: #FAFBFC;
}

.about-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.1);
    background: var(--card-bg);
}

.markdown-help {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.markdown-help h3 {
    font-size: 16px;
    margin-bottom: 12px;
}

.help-table {
    width: 100%;
    border-collapse: collapse;
}

.help-table td {
    padding: 6px 12px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

.help-table td:first-child {
    width: 180px;
}

.help-table code {
    background: var(--bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--danger);
}

/* 响应式 */
@media (max-width: 768px) {
    .site-header .container {
        height: 54px;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 54px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: 12px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
    }

    .site-nav.open {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .article-list {
        gap: 12px;
    }

    .article-card-plain .card-body {
        padding: 16px 18px;
    }

    .hero-section {
        padding: 20px 0 16px;
    }

    .hero-section h1 {
        font-size: 24px;
    }

    .hero-stats {
        gap: 16px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .admin-actions {
        flex-direction: column;
    }

    .admin-actions .btn {
        width: 100%;
    }

    .admin-table {
        font-size: 13px;
    }

    .admin-table th,
    .admin-table td {
        padding: 10px 12px;
    }

    .login-card {
        padding: 30px 24px;
    }

    .page-content {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 14px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .stat-number {
        font-size: 28px;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}

/* ==============================
   后台专用样式（响应式重构）
   ============================== */

/* 后台 body 底部留出移动导航栏的空间 */
body.admin-body {
    padding-bottom: 0;
}

/* 后台顶部导航 */
.admin-header .admin-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 56px;
}

.admin-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-nav {
    display: flex;
    align-items: center;
    gap: 2px;
}

.admin-nav-link {
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

.admin-nav-link:hover {
    background: var(--bg);
    color: var(--text);
}

.admin-nav-link.active {
    background: rgba(74, 144, 217, 0.1);
    color: var(--primary);
}

.admin-nav-logout {
    color: var(--danger);
}

.admin-nav-logout:hover {
    background: #FDE8E8;
    color: var(--danger);
}

/* 移动端底部导航栏（默认隐藏） */
.mobile-bottom-nav {
    display: none;
}

/* admin-main 在桌面 */
.admin-main {
    padding-top: 20px;
    min-height: calc(100vh - 56px);
}

/* 后台响应式 - 平板/手机 */
@media (max-width: 768px) {
    /* 隐藏顶部导航，显示底部导航 */
    .admin-nav {
        display: none;
    }

    .admin-header .admin-header-inner {
        height: 50px;
        padding: 0 14px;
    }

    /* 底部导航栏 */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border-top: 1px solid var(--border);
        z-index: 200;
        padding-bottom: env(safe-area-inset-bottom, 0);
        box-shadow: 0 -2px 12px rgba(0,0,0,0.08);
    }

    .mobile-nav-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 8px 4px 10px;
        text-decoration: none;
        color: var(--text-secondary);
        font-size: 11px;
        gap: 3px;
        transition: all 0.2s;
    }

    .mobile-nav-item.active {
        color: var(--primary);
    }

    .mobile-nav-item:hover {
        color: var(--primary);
    }

    .mobile-nav-icon {
        font-size: 20px;
        line-height: 1;
    }

    .mobile-nav-label {
        line-height: 1;
    }

    /* body 底部留出导航栏空间（约 60px + safe area） */
    body.admin-body {
        padding-bottom: calc(60px + env(safe-area-inset-bottom, 0));
    }

    .admin-main {
        padding-top: 10px;
    }
}