/* ========================================
   SerpNews 统一设计系统
   ======================================== */

/* CSS 变量 */
:root {
    /* 主色调 */
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-secondary: #1890ff;
    --color-success: #52c41a;
    --color-warning: #fa8c16;
    --color-error: #ff4d4f;

    /* 中性色 */
    --color-bg: #f5f7fa;
    --color-card: #ffffff;
    --color-text: #333333;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    --color-border: #e8e8e8;
    --color-border-light: #f0f0f0;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-green: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --gradient-purple: linear-gradient(135deg, #8e2de2 0%, #4a00e0 100%);
    --gradient-orange: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);

    /* 布局 */
    --max-width: 1400px;
    --nav-height: 64px;
    --sidebar-width: 380px;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, monospace;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* 布局 */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* 导航栏 */
.navbar {
    height: var(--nav-height);
    background: var(--color-card);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.navbar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav {
    display: flex;
    gap: var(--spacing-xs);
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.nav-link.active {
    background: var(--gradient-primary);
    color: white;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* 关键词标签 */
.keyword-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.keyword-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.keyword-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.keyword-tag.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

/* 状态指示器 */
.status-dots {
    display: flex;
    gap: 4px;
    align-items: center;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.normal {
    background-color: var(--color-success);
}

.status-dot.error {
    background-color: var(--color-error);
}

.status-dot.warning {
    background-color: var(--color-warning);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* 卡片 */
.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}

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

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* 统计卡片 */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 100%);
}

.stat-card.green {
    background: var(--gradient-green);
}

.stat-card.purple {
    background: var(--gradient-purple);
}

.stat-card.orange {
    background: var(--gradient-orange);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    position: relative;
}

/* 新闻列表 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.news-item {
    padding: var(--spacing-lg);
    background: var(--color-card);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

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

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

.news-keyword-badge {
    padding: 2px var(--spacing-sm);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
}

.news-title {
    flex: 1;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.5;
}

.news-title a {
    color: inherit;
}

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

.news-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.news-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.news-source {
    font-weight: 600;
    color: var(--color-primary);
}

.news-snippet {
    color: var(--color-text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.news-tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.news-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.tag-category {
    background: var(--color-bg);
    color: var(--color-text-secondary);
}

.tag-sentiment-positive {
    background: #f6ffed;
    color: var(--color-success);
    border: 1px solid #b7eb8f;
}

.tag-sentiment-neutral {
    background: #fafafa;
    color: var(--color-text-tertiary);
    border: 1px solid var(--color-border);
}

.tag-sentiment-negative {
    background: #fff1f0;
    color: var(--color-error);
    border: 1px solid #ffccc7;
}

/* 筛选栏 */
.filter-bar {
    background: var(--color-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

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

.filter-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.filter-btn.active {
    background: var(--color-secondary);
    color: white;
    border-color: var(--color-secondary);
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    transition: border-color 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-secondary);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.page-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 40px;
}

.page-btn:hover:not(:disabled) {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

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

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-info {
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
}

/* 图表容器 */
.chart-container {
    position: relative;
    height: 200px;
}

.chart-container.large {
    height: 280px;
}

/* 日志 */
.log-list {
    max-height: 240px;
    overflow-y: auto;
}

.log-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.875rem;
}

.log-item:last-child {
    border-bottom: none;
}

.log-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.log-icon.success {
    background: #f6ffed;
    color: var(--color-success);
}

.log-icon.error {
    background: #fff1f0;
    color: var(--color-error);
}

.log-icon.pending {
    background: var(--color-bg);
    color: var(--color-text-tertiary);
}

.log-time {
    color: var(--color-text-tertiary);
    font-size: 0.75rem;
    min-width: 60px;
}

.log-detail {
    flex: 1;
    color: var(--color-text-secondary);
}

.log-count {
    color: var(--color-text-tertiary);
    font-size: 0.75rem;
}

/* Dashboard 布局 */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--spacing-lg);
}

.dashboard-left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.dashboard-right {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* 按钮 */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    border: none;
}

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

.btn-primary:hover {
    background: #40a9ff;
}

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

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

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    color: var(--color-text-tertiary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.empty-state-title {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-tertiary);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-secondary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: var(--spacing-sm);
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 页脚 */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
}

/* 响应式 */
@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

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

    .navbar-content {
        padding: 0 var(--spacing-md);
    }

    .navbar-nav {
        display: none;
    }

    .keyword-tags {
        display: none;
    }

    .stat-cards {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        flex-wrap: wrap;
    }

    .news-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .chart-container {
        height: 160px;
    }
}

/* 工具类 */
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }