/* 论坛管理后台专用样式 */

/* CSS 变量 */
:root {
    --admin-header-bg: #2c3e50;
    --admin-header-color: #fff;
    --admin-sidebar-bg: #fff;
    --admin-sidebar-width: 260px;
    --admin-sidebar-collapsed-width: 0px;
    --admin-main-bg: #f5f7fa;
    --admin-card-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --admin-border-color: #e8ecef;
    --admin-primary: #4a9eff;
    --admin-success: #2ecc71;
    --admin-danger: #e74c3c;
    --admin-warning: #f39c12;
    --admin-text-primary: #2c3e50;
    --admin-text-secondary: #7f8c8d;
    --admin-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础布局 */
.admin-layout {
    display: flex;
    min-height: 100vh;
    background: var(--admin-main-bg);
}

/* 侧边栏 */
.admin-sidebar {
    width: var(--admin-sidebar-width);
    background: var(--admin-sidebar-bg);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1002;
    transition: var(--admin-transition);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
}

.admin-sidebar::-webkit-scrollbar {
    width: 6px;
}

.admin-sidebar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
}

.admin-sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--admin-border-color);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.admin-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
}

.admin-sidebar-brand-icon {
    font-size: 28px;
}

.admin-sidebar-user {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 13px;
}

.admin-sidebar-user-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.admin-sidebar-user-role {
    opacity: 0.9;
    font-size: 12px;
}

.admin-sidebar-nav {
    padding: 15px 0;
}

.admin-sidebar-nav-item {
    display: block;
    padding: 12px 20px;
    color: var(--admin-text-primary);
    text-decoration: none;
    transition: var(--admin-transition);
    border-left: 3px solid transparent;
    font-size: 14px;
}

.admin-sidebar-nav-item:hover {
    background: rgba(74, 158, 255, 0.08);
    color: var(--admin-primary);
    border-left-color: var(--admin-primary);
}

.admin-sidebar-nav-item.active {
    background: rgba(74, 158, 255, 0.12);
    color: var(--admin-primary);
    border-left-color: var(--admin-primary);
    font-weight: 600;
}

.admin-sidebar-nav-item i {
    margin-right: 10px;
    width: 20px;
    display: inline-block;
    text-align: center;
}

.admin-sidebar-footer {
    margin-top: auto;
    padding: 15px 20px;
    border-top: 1px solid var(--admin-border-color);
}

.admin-sidebar-footer a {
    display: block;
    padding: 10px;
    text-align: center;
    background: rgba(231, 76, 60, 0.08);
    color: var(--admin-danger);
    text-decoration: none;
    border-radius: 6px;
    transition: var(--admin-transition);
    font-weight: 500;
}

.admin-sidebar-footer a:hover {
    background: rgba(231, 76, 60, 0.15);
}

/* 主内容区 */
.admin-content {
    flex: 1;
    margin-left: var(--admin-sidebar-width);
    transition: var(--admin-transition);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* 顶部导航栏 */
.admin-topbar {
    background: #fff;
    padding: 15px 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 999;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-topbar-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--admin-text-primary);
}

.admin-topbar-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.admin-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--admin-text-primary);
    padding: 5px;
}

.admin-breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 13px;
    color: var(--admin-text-secondary);
}

.admin-breadcrumb a {
    color: var(--admin-primary);
    text-decoration: none;
}

.admin-breadcrumb a:hover {
    text-decoration: underline;
}

/* 主内容区域 */
.admin-main-content {
    padding: 30px;
    flex: 1;
}

/* 统计卡片 */
.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.admin-stat-card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--admin-card-shadow);
    transition: var(--admin-transition);
    position: relative;
    overflow: hidden;
}

.admin-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--admin-primary), #667eea);
}

.admin-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.admin-stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--admin-primary);
    margin-bottom: 8px;
}

.admin-stat-label {
    color: var(--admin-text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.admin-stat-icon {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 48px;
    opacity: 0.1;
}

/* 卡片组件 */
.admin-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: var(--admin-card-shadow);
    overflow: hidden;
    margin-bottom: 20px;
}

.admin-card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--admin-border-color);
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.05), rgba(102, 126, 234, 0.05));
}

.admin-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--admin-text-primary);
    margin: 0;
}

.admin-card-body {
    padding: 24px;
}

.admin-card-footer {
    padding: 15px 24px;
    border-top: 1px solid var(--admin-border-color);
    background: rgba(0, 0, 0, 0.02);
}

/* 表格样式 */
.admin-table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

.admin-table thead {
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.05), rgba(102, 126, 234, 0.05));
}

.admin-table th {
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: var(--admin-text-primary);
    border-bottom: 2px solid var(--admin-border-color);
    white-space: nowrap;
}

.admin-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--admin-border-color);
    font-size: 14px;
    color: var(--admin-text-primary);
}

.admin-table tbody tr {
    transition: var(--admin-transition);
}

.admin-table tbody tr:hover {
    background: rgba(74, 158, 255, 0.04);
}

.admin-table tbody tr:last-child td {
    border-bottom: none;
}

/* 徽章样式 */
.admin-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
}

.admin-badge-primary {
    background: rgba(74, 158, 255, 0.12);
    color: var(--admin-primary);
}

.admin-badge-success {
    background: rgba(46, 204, 113, 0.12);
    color: var(--admin-success);
}

.admin-badge-danger {
    background: rgba(231, 76, 60, 0.12);
    color: var(--admin-danger);
}

.admin-badge-warning {
    background: rgba(243, 156, 18, 0.12);
    color: var(--admin-warning);
}

.admin-badge-secondary {
    background: rgba(127, 140, 141, 0.12);
    color: var(--admin-text-secondary);
}

/* 按钮样式 */
.admin-btn {
    display: inline-block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--admin-transition);
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}

.admin-btn-primary {
    background: var(--admin-primary);
    color: #fff;
}

.admin-btn-primary:hover {
    background: #3a8eef;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 158, 255, 0.3);
}

.admin-btn-success {
    background: var(--admin-success);
    color: #fff;
}

.admin-btn-success:hover {
    background: #27ae60;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(46, 204, 113, 0.3);
}

.admin-btn-danger {
    background: var(--admin-danger);
    color: #fff;
}

.admin-btn-danger:hover {
    background: #c0392b;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.admin-btn-warning {
    background: var(--admin-warning);
    color: #fff;
}

.admin-btn-warning:hover {
    background: #e67e22;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(243, 156, 18, 0.3);
}

.admin-btn-outline {
    background: transparent;
    border: 1px solid var(--admin-border-color);
    color: var(--admin-text-primary);
}

.admin-btn-outline:hover {
    background: rgba(74, 158, 255, 0.08);
    border-color: var(--admin-primary);
    color: var(--admin-primary);
}

.admin-btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.admin-btn-group {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* 表单样式 */
.admin-form-group {
    margin-bottom: 20px;
}

.admin-form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--admin-text-primary);
    font-size: 14px;
}

.admin-form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--admin-border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--admin-transition);
    background: #fff;
}

.admin-form-control:focus {
    outline: none;
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.admin-form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

/* 分页样式 */
.admin-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
}

.admin-pagination a {
    display: inline-block;
    padding: 8px 14px;
    background: #fff;
    border: 1px solid var(--admin-border-color);
    border-radius: 6px;
    color: var(--admin-text-primary);
    text-decoration: none;
    transition: var(--admin-transition);
    font-weight: 500;
}

.admin-pagination a:hover {
    background: var(--admin-primary);
    border-color: var(--admin-primary);
    color: #fff;
    transform: translateY(-2px);
}

.admin-pagination a.active {
    background: var(--admin-primary);
    border-color: var(--admin-primary);
    color: #fff;
}

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

.admin-empty-state-icon {
    font-size: 64px;
    margin-bottom: 15px;
    opacity: 0.3;
}

.admin-empty-state-text {
    font-size: 16px;
}

/* 警告框 */
.admin-alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-alert-success {
    background: rgba(46, 204, 113, 0.12);
    color: var(--admin-success);
    border-left: 4px solid var(--admin-success);
}

.admin-alert-error {
    background: rgba(231, 76, 60, 0.12);
    color: var(--admin-danger);
    border-left: 4px solid var(--admin-danger);
}

.admin-alert-warning {
    background: rgba(243, 156, 18, 0.12);
    color: var(--admin-warning);
    border-left: 4px solid var(--admin-warning);
}

.admin-alert-info {
    background: rgba(74, 158, 255, 0.12);
    color: var(--admin-primary);
    border-left: 4px solid var(--admin-primary);
}

/* 快捷操作区 */
.admin-quick-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* 登录页面样式 */
.admin-auth-wrapper {
    display: flex;
    min-height: 100vh;
}

.admin-auth-left {
    flex: 1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: #fff;
}

.admin-auth-left-content {
    text-align: center;
    max-width: 400px;
}

.admin-auth-left-logo {
    font-size: 80px;
    margin-bottom: 20px;
}

.admin-auth-left-title {
    font-size: 36px;
    margin-bottom: 15px;
    font-weight: 700;
}

.admin-auth-left-desc {
    font-size: 16px;
    opacity: 0.9;
    line-height: 1.6;
}

.admin-auth-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: #f5f7fa;
}

.admin-auth-container {
    width: 100%;
    max-width: 420px;
}

.admin-auth-box {
    background: #fff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--admin-card-shadow);
}

.admin-auth-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--admin-text-primary);
    margin-bottom: 10px;
    text-align: center;
}

.admin-auth-subtitle {
    color: var(--admin-text-secondary);
    text-align: center;
    margin-bottom: 30px;
    font-size: 14px;
}

.admin-auth-footer {
    margin-top: 25px;
    text-align: center;
    color: var(--admin-text-secondary);
    font-size: 14px;
}

.admin-auth-footer a {
    color: var(--admin-primary);
    text-decoration: none;
    font-weight: 500;
}

.admin-auth-footer a:hover {
    text-decoration: underline;
}

/* 移动端汉堡菜单 */
.admin-mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.admin-mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* 确保侧边栏始终在遮罩层之上 */
.admin-sidebar {
    z-index: 1002;
}

.admin-sidebar.active {
    z-index: 1002;
}

/* 侧边栏激活时，确保可以点击 */
.admin-sidebar.active .admin-sidebar-nav,
.admin-sidebar.active .admin-sidebar-header,
.admin-sidebar.active .admin-sidebar-footer {
    position: relative;
    z-index: 1003;
}

/* ========== 响应式设计 ========== */

/* 平板和移动端 */
@media (max-width: 1024px) {
    .admin-sidebar {
        transform: translateX(-100%);
        box-shadow: none;
    }

    .admin-sidebar.active {
        transform: translateX(0);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.15);
    }

    .admin-content {
        margin-left: 0;
    }

    .admin-menu-toggle {
        display: block;
    }

    .admin-mobile-menu-overlay {
        display: block;
        pointer-events: none;
    }

    .admin-mobile-menu-overlay.active {
        pointer-events: auto;
    }

    .admin-main-content {
        padding: 20px;
    }

    .admin-stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }

    .admin-stat-card {
        padding: 20px;
    }

    .admin-stat-value {
        font-size: 30px;
    }
}

/* PC 端确保遮罩层完全不可用 */
@media (min-width: 1025px) {
    .admin-mobile-menu-overlay {
        display: none !important;
        pointer-events: none !important;
    }
    
    .admin-mobile-menu-overlay.active {
        display: none !important;
        pointer-events: none !important;
    }
}

/* 手机端 */
@media (max-width: 768px) {
    .admin-topbar {
        padding: 12px 15px;
    }

    .admin-topbar-title {
        font-size: 18px;
    }

    .admin-main-content {
        padding: 15px;
    }

    .admin-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .admin-stat-card {
        padding: 16px;
    }

    .admin-stat-value {
        font-size: 26px;
    }

    .admin-stat-label {
        font-size: 12px;
    }

    .admin-stat-icon {
        font-size: 36px;
        top: 15px;
        right: 15px;
    }

    .admin-card {
        border-radius: 10px;
    }

    .admin-card-header,
    .admin-card-body,
    .admin-card-footer {
        padding: 16px;
    }

    .admin-card-title {
        font-size: 16px;
    }

    .admin-table th,
    .admin-table td {
        padding: 10px 12px;
        font-size: 13px;
    }

    .admin-table th {
        font-size: 12px;
    }

    .admin-btn {
        padding: 7px 12px;
        font-size: 13px;
    }

    .admin-btn-sm {
        padding: 4px 8px;
        font-size: 11px;
    }

    .admin-btn-group {
        gap: 4px;
    }

    .admin-form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .admin-pagination {
        flex-wrap: wrap;
        gap: 6px;
    }

    .admin-pagination a {
        padding: 6px 10px;
        font-size: 12px;
    }

    /* 登录页面移动端优化 */
    .admin-auth-wrapper {
        flex-direction: column;
    }

    .admin-auth-left {
        padding: 40px 20px;
        min-height: 30vh;
    }

    .admin-auth-left-logo {
        font-size: 60px;
    }

    .admin-auth-left-title {
        font-size: 28px;
    }

    .admin-auth-left-desc {
        font-size: 14px;
    }

    .admin-auth-right {
        padding: 20px 15px;
        align-items: flex-start;
    }

    .admin-auth-box {
        padding: 25px 20px;
        border-radius: 12px;
    }

    .admin-auth-title {
        font-size: 24px;
    }

    .admin-form-control {
        padding: 11px 13px;
        font-size: 15px;
    }

    /* 表格移动端优化 - 卡片式布局 */
    .admin-table-responsive {
        border-radius: 10px;
        overflow: hidden;
    }

    .admin-table thead {
        display: none;
    }

    .admin-table tbody tr {
        display: block;
        padding: 15px;
        margin-bottom: 12px;
        background: #fff;
        border: 1px solid var(--admin-border-color);
        border-radius: 10px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
    }

    .admin-table tbody tr:last-child {
        margin-bottom: 0;
    }

    .admin-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 8px 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        background: transparent;
    }

    .admin-table td:last-child {
        border-bottom: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .admin-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--admin-text-secondary);
        font-size: 12px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    .admin-table .admin-btn-group {
        width: 100%;
    }

    .admin-table .admin-btn {
        flex: 1;
        text-align: center;
    }

    /* 徽章移动端优化 */
    .admin-badge {
        padding: 3px 8px;
        font-size: 11px;
    }

    /* 快捷操作移动端优化 */
    .admin-quick-actions {
        flex-direction: column;
    }

    .admin-quick-actions .admin-btn {
        width: 100%;
        text-align: center;
    }

    /* 分页移动端优化 */
    .admin-pagination {
        justify-content: center;
    }

    .admin-pagination a {
        min-width: 36px;
        text-align: center;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .admin-stats-grid {
        grid-template-columns: 1fr;
    }

    .admin-auth-left {
        min-height: 25vh;
        padding: 30px 15px;
    }

    .admin-auth-left-logo {
        font-size: 48px;
    }

    .admin-auth-left-title {
        font-size: 24px;
    }

    .admin-auth-left-desc {
        font-size: 13px;
    }

    .admin-auth-box {
        padding: 20px 15px;
    }

    .admin-auth-title {
        font-size: 22px;
    }
}

/* 动画效果 */
@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.admin-sidebar.active {
    animation: slideIn 0.3s ease-out;
}

.admin-alert {
    animation: fadeIn 0.3s ease-out;
}

/* 滚动条美化 */
.admin-sidebar::-webkit-scrollbar {
    width: 6px;
}

.admin-sidebar::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

.admin-sidebar::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.admin-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* 打印样式 */
@media print {
    .admin-sidebar,
    .admin-topbar,
    .admin-mobile-menu-overlay {
        display: none !important;
    }

    .admin-content {
        margin-left: 0;
    }

    .admin-main-content {
        padding: 0;
    }
}