/* ========================================
   工商财税 BI 报表系统 - 样式表
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --sidebar-bg: #1e293b;
  --sidebar-hover: #334155;
  --sidebar-active: #1a73e8;
  --bg: #f1f5f9;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --up-color: #22c55e;
  --down-color: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --radius: 8px;
  --radius-lg: 12px;
}

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

/* --- Sidebar --- */
.sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--sidebar-bg);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform 0.3s;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo-icon {
  font-size: 28px;
}

.sidebar-logo h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  border-left: 3px solid transparent;
  cursor: pointer;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.nav-item.active {
  background: rgba(26, 115, 232, 0.15);
  color: #fff;
  border-left-color: var(--sidebar-active);
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}

.user-detail {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 14px;
  font-weight: 500;
}

.user-role {
  font-size: 12px;
  color: #94a3b8;
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  margin-left: 240px;
  padding: 0;
  min-height: 100vh;
}

/* --- Top Bar --- */
.topbar {
  background: var(--card-bg);
  padding: 16px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.topbar-left {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.topbar-left h1 {
  font-size: 22px;
  font-weight: 700;
}

.update-time {
  font-size: 13px;
  color: var(--text-muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.date-range {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.btn-period {
  padding: 6px 14px;
  font-size: 13px;
  border: none;
  background: #fff;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-period + .btn-period {
  border-left: 1px solid var(--border);
}

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

.btn-period:hover:not(.active) {
  background: #f8fafc;
}

.btn-refresh {
  padding: 8px 16px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-refresh:hover {
  background: #f8fafc;
  color: var(--primary);
  border-color: var(--primary);
}

/* --- Page Container --- */
.page-container {
  padding: 24px 28px;
}

.page-section {
  display: none;
}

.page-section.active {
  display: block;
}

/* --- Stats Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.stat-icon.blue { background: #dbeafe; }
.stat-icon.orange { background: #fef3c7; }
.stat-icon.green { background: #dcfce7; }
.stat-icon.purple { background: #ede9fe; }

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

.stat-value {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 6px;
}

.stat-change {
  font-size: 13px;
  font-weight: 500;
}

.stat-change.up { color: var(--up-color); }
.stat-change.down { color: var(--down-color); }

/* --- Chart Section --- */
.chart-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}

.chart-card.wide {
  grid-column: 1 / -1;
}

.chart-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.chart-container {
  position: relative;
  width: 100%;
  height: 280px;
}

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

/* Pie */
.pie-legend {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* --- Table Section --- */
.table-section {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.table-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.link-more {
  font-size: 13px;
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
}

.link-more:hover {
  text-decoration: underline;
}

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

.data-table th {
  background: #f8fafc;
  padding: 10px 14px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

.data-table .amount {
  font-family: "SF Mono", "Menlo", "Monaco", monospace;
  font-weight: 500;
}

.data-table .tax-amount {
  font-family: "SF Mono", "Menlo", "Monaco", monospace;
  color: #f59e0b;
  font-weight: 500;
}

.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.status-badge.completed {
  background: #dcfce7;
  color: #16a34a;
}

.status-badge.reviewing {
  background: #fef3c7;
  color: #d97706;
}

.status-badge.returned {
  background: #fee2e2;
  color: #dc2626;
}

/* --- Filter Bar --- */
.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-select,
.filter-input {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-primary);
  background: #fff;
  outline: none;
  transition: border-color 0.2s;
}

.filter-select:focus,
.filter-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.filter-input {
  min-width: 200px;
}

.btn-search {
  padding: 8px 18px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.pagination button:hover {
  border-color: var(--primary);
  color: var(--primary);
}

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

.pagination .page-info {
  padding: 6px 12px;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

/* --- Report Cards --- */
.report-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.report-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.report-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.report-card-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.report-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.report-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.btn-report {
  padding: 10px 24px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* --- Loading Overlay --- */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.8);
  z-index: 1000;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.loading-overlay.show {
  display: flex;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}

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

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

/* --- Notification --- */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 24px;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  font-size: 14px;
  z-index: 2000;
  transform: translateX(120%);
  transition: transform 0.3s ease;
  border-left: 4px solid var(--primary);
}

.toast.show {
  transform: translateX(0);
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

/* --- Responsive --- */
@media (max-width: 1200px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .chart-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .report-cards {
    grid-template-columns: 1fr;
  }
  .topbar {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
  .page-container {
    padding: 16px;
  }
}