:root {
  --bg-main: #0b0f19;
  --bg-card: #151d30;
  --bg-card-hover: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary-color: #38bdf8;
  --primary-hover: #0284c7;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --border-color: #2a364f;
  --navbar-bg: rgba(11, 15, 25, 0.85);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary-color: #0284c7;
  --primary-hover: #0369a1;
  --success-color: #059669;
  --danger-color: #dc2626;
  --warning-color: #d97706;
  --border-color: #e2e8f0;
  --navbar-bg: rgba(255, 255, 255, 0.9);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  padding-bottom: 3rem;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--navbar-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-text {
  background: linear-gradient(135deg, var(--primary-color), var(--success-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-color);
}

.customer-select {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Header Banner */
.portal-header {
  margin-bottom: 2rem;
}

.portal-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
}

.portal-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Stats Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
}

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

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.stat-card.income .stat-icon {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success-color);
}

.stat-card.expense .stat-icon {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger-color);
}

.stat-card.net .stat-icon {
  background: rgba(56, 189, 248, 0.15);
  color: var(--primary-color);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 0.2rem;
}

.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-primary { color: var(--primary-color) !important; }

/* Filter Tabs & Toolbar Grid */
.actions-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.filter-tabs {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.25rem;
  border-radius: 10px;
  gap: 0.25rem;
}

.filter-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.4rem 0.9rem;
  border-radius: 7px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-tab-btn.active {
  background: var(--primary-color);
  color: #ffffff;
}

/* Toolbar Grid: Search, Category, Sort, Limit */
.toolbar-grid {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.search-input {
  flex: 1;
  min-width: 220px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.88rem;
  transition: border-color 0.2s ease;
}

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

.select-input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.export-btn {
  background: var(--success-color);
  color: #ffffff;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: opacity 0.2s ease;
}

.export-btn:hover {
  opacity: 0.9;
}

/* Card Container & Table */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th, td {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-card-hover);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tbody tr {
  transition: background 0.15s ease;
}

tbody tr:hover {
  background: var(--bg-card-hover);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-income {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success-color);
}

.badge-expense {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger-color);
}

.badge-category {
  background: rgba(56, 189, 248, 0.12);
  color: var(--primary-color);
  font-weight: 600;
  text-transform: none;
}

/* Pagination Bar */
.pagination-bar {
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 1rem;
}

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

.page-controls {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.page-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-btn:hover:not(:disabled) {
  background: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
}

/* Mobile Precision Adjustments */
@media (max-width: 768px) {
  .navbar {
    padding: 0.8rem 1rem;
  }
  .container {
    padding: 1rem;
  }
  .portal-header h1 {
    font-size: 1.4rem;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
  .stat-card {
    padding: 1rem;
  }
  .stat-value {
    font-size: 1.3rem;
  }
  th, td {
    padding: 0.75rem 0.85rem;
    font-size: 0.82rem;
  }
  .actions-bar, .toolbar-grid {
    flex-direction: column;
    align-items: stretch;
  }
  .search-input, .select-input, .export-btn {
    width: 100%;
  }
}