/* ============================================
   组件样式 - AI Forum
   ============================================ */

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Logo区域 */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-logo {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), #a855f7);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    transition: transform var(--transition-fast);
}

.navbar-brand:hover .brand-logo {
    transform: scale(1.05) rotate(5deg);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.brand-slogan {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 2px;
}

/* 主导航 */
.navbar-center {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    padding: 6px;
    border-radius: 16px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-item:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.nav-item.active {
    color: white;
    background: linear-gradient(135deg, var(--primary-color), #a855f7);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.nav-icon {
    font-size: 1.1rem;
}

/* 右侧操作区 */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 搜索框 */
.search-wrapper {
    position: relative;
}

.navbar-search {
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 0 12px;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.navbar-search:focus-within {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.search-icon {
    font-size: 0.9rem;
    opacity: 0.6;
}

.search-input {
    border: none;
    background: transparent;
    padding: 10px 8px;
    color: var(--text-primary);
    width: 160px;
    font-size: 0.9rem;
    outline: none;
    transition: width var(--transition-fast);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.navbar-search:focus-within .search-input {
    width: 220px;
}

/* 发帖按钮 */
.btn-create {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary-color), #a855f7);
    color: white;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    transition: all var(--transition-fast);
}

.btn-create:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

/* 主题切换按钮 */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: none;
    background: var(--bg-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--primary-light);
    transform: rotate(20deg);
}

.theme-icon {
    font-size: 1.3rem;
}

/* 用户菜单 */
.user-menu {
    position: relative;
}

.user-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px 6px 6px;
    background: var(--bg-tertiary);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-trigger:hover {
    background: var(--primary-light);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    object-fit: cover;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dropdown-arrow {
    font-size: 0.6rem;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.user-menu:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.user-menu:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.dropdown-item.logout:hover {
    background: #fee2e2;
    color: #dc2626;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0;
}

/* 登录/注册按钮 */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-login {
    padding: 10px 20px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    border-radius: 12px;
    transition: all var(--transition-fast);
}

.btn-login:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
}

.btn-register {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary-color), #a855f7);
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
    transition: all var(--transition-fast);
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: 12px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--primary-light);
}

/* 移动端下拉菜单 */
.mobile-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    padding: var(--spacing-md);
}

.mobile-menu-search {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.mobile-menu-search .search-input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 1rem;
}

.mobile-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    font-size: 1rem;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.mobile-menu-item:hover,
.mobile-menu-item:active {
    background: var(--primary-light);
}

.mobile-menu-item.mobile-menu-logout {
    color: #ef4444;
}

.mobile-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-md) 0;
}

/* 移动菜单遮罩 */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 998;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 移动菜单按钮动画 */
.mobile-menu-btn.open {
    background: var(--primary-light);
    transform: rotate(90deg);
}

/* 响应式导航 */
@media (max-width: 1024px) {
    .navbar-center {
        display: none;
    }

    .search-wrapper {
        display: none;
    }
}

@media (max-width: 768px) {
    .navbar-container {
        padding: 0 var(--spacing-md);
        height: 60px;
    }

    .brand-text {
        display: none;
    }

    .brand-logo {
        width: 42px;
        height: 42px;
    }

    .btn-create span:last-child {
        display: none;
    }

    .btn-create {
        padding: 10px 14px;
    }

    .user-name {
        display: none;
    }

    .dropdown-arrow {
        display: none;
    }

    .user-trigger {
        padding: 4px;
        background: transparent;
    }

    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        /* 触摸优化 */
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

    .mobile-menu-btn:active {
        transform: scale(0.95);
    }

    .auth-buttons .btn-login {
        display: none;
    }
}

/* 帖子卡片 */
.post-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.post-card-pinned {
    border-left: 4px solid var(--primary-color);
    background: linear-gradient(to right, var(--primary-light), var(--bg-secondary));
}

.post-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.post-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.post-author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.post-time {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.post-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.post-content {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.post-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 版块卡片 */
.board-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.board-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.board-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.board-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.board-description {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.board-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* 评论 */
.comment {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.comment:last-child {
    border-bottom: none;
}

.comment-avatar {
    flex-shrink: 0;
}

.comment-body {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-time {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.comment-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

.comment-ai {
    background: linear-gradient(135deg, #f3e7ff 0%, #e7f3ff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

[data-theme="dark"] .comment-ai {
    background: linear-gradient(135deg, #2d1f3d 0%, #1f2d3d 100%);
}

/* AI聊天界面 */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 64px);
    background: var(--bg-secondary);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.chat-input-area {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.chat-input-wrapper {
    display: flex;
    gap: var(--spacing-md);
}

.chat-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    resize: none;
    max-height: 120px;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.message {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.message.ai .message-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.message.user .message-avatar {
    background: var(--primary-color);
}

.message-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: var(--radius-lg);
    line-height: 1.6;
}

.message.ai .message-bubble {
    background: var(--bg-tertiary);
    border-top-left-radius: var(--radius-sm);
}

.message.user .message-bubble {
    background: var(--primary-color);
    color: white;
    border-top-right-radius: var(--radius-sm);
}

/* 对话列表 */
.dialog-list {
    list-style: none;
}

.dialog-item {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dialog-item:hover {
    background: var(--bg-tertiary);
}

.dialog-item.active {
    background: var(--primary-light);
}

.dialog-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.dialog-preview {
    color: var(--text-muted);
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 统计卡片 */
.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 配置编辑器 */
.config-editor {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.config-section {
    margin-bottom: var(--spacing-lg);
}

.config-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.config-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.config-key {
    font-family: monospace;
    color: var(--text-secondary);
}

.config-value {
    flex: 1;
    margin: 0 var(--spacing-md);
}

/* 标签 */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-xl);
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 500;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.pagination-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-item:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.pagination-item.active {
    background: var(--primary-color);
    color: white;
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
    color: var(--text-muted);
}