/* ============================================================
   数据大屏样式
   ============================================================ */

.dashboard-page {
    background: #0f172a;
    min-height: 100vh;
    color: #e2e8f0;
    padding: var(--spacing-lg);
}

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.dashboard-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: #f1f5f9;
}

.dashboard-time {
    font-size: var(--font-size-sm);
    color: #94a3b8;
}

/* 顶部统计数字 */
.dashboard-kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.kpi-card {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.15), rgba(129, 140, 248, 0.08));
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.kpi-card-pv {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(167, 139, 250, 0.08));
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.kpi-card-pv .kpi-value {
    color: #a78bfa;
}

.kpi-card-uv {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(52, 211, 153, 0.08));
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.kpi-card-uv .kpi-value {
    color: #34d399;
}

.kpi-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: #818cf8;
    line-height: 1.2;
}

.kpi-label {
    font-size: var(--font-size-sm);
    color: #94a3b8;
    margin-top: var(--spacing-xs);
}

.kpi-change {
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
}

.kpi-change.up { color: #34d399; }
.kpi-change.down { color: #f87171; }

/* 图表区域 */
.dashboard-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
}

.chart-panel {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.chart-panel.full-width {
    grid-column: 1 / -1;
}

.chart-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.chart-panel-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: #e2e8f0;
}

.chart-panel-subtitle {
    font-size: var(--font-size-xs);
    color: #64748b;
}

.chart-container {
    width: 100%;
    height: 320px;
}

.chart-container.large {
    height: 400px;
}

/* 实时动态列表 */
.activity-feed {
    max-height: 320px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
    font-size: var(--font-size-sm);
}

.activity-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.activity-dot.submit { background: #34d399; }
.activity-dot.comment { background: #818cf8; }

.activity-time {
    color: #64748b;
    font-size: var(--font-size-xs);
    white-space: nowrap;
}

.activity-text {
    flex: 1;
    color: #cbd5e1;
}

/* 题目统计表格 */
.stats-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.stats-table th {
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    color: #94a3b8;
    font-weight: 500;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.stats-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
    color: #e2e8f0;
}

.stats-bar {
    height: 6px;
    background: rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
    min-width: 80px;
}

.stats-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #4f46e5, #818cf8);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

/* 响应式 */
@media (max-width: 1024px) {
    .dashboard-charts {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .dashboard-page {
        padding: var(--spacing-md);
    }

    .dashboard-kpi-row {
        grid-template-columns: 1fr 1fr;
    }

    .kpi-value {
        font-size: var(--font-size-2xl);
    }

    .chart-container {
        height: 240px;
    }

    .chart-container.large {
        height: 300px;
    }

    .dashboard-title {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 480px) {
    .dashboard-kpi-row {
        grid-template-columns: 1fr;
    }
}