/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #1e293b;
  --primary-light: #334155;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --info: #06b6d4;
  --purple: #8b5cf6;
  --bg: #f1f5f9;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --sidebar-width: 260px;
  --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 -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --transition: 0.2s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); text-decoration: none; }

/* ==================== Login Page ==================== */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #3b82f6 100%);
  padding: 20px;
}
.login-container { width: 100%; max-width: 420px; }
.login-box {
  background: white;
  border-radius: 20px;
  padding: 48px 40px;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
  text-align: center;
}
.login-box h1 { color: var(--primary); margin-bottom: 4px; font-size: 28px; font-weight: 800; letter-spacing: -0.5px; }
.login-subtitle { color: var(--text-muted); margin-bottom: 32px; font-size: 14px; }
.login-box .form-group { text-align: left; }
.login-box .btn-primary { width: 100%; padding: 12px; font-size: 15px; margin-top: 8px; }

/* ==================== Sidebar ==================== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--primary);
  color: white;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  overflow-y: auto;
  transition: transform 0.3s ease;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 4px; }
.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-header h2 { font-size: 20px; margin-bottom: 4px; font-weight: 700; letter-spacing: -0.3px; }
.sidebar-header small { color: rgba(255,255,255,0.5); font-size: 12px; }
.nav-menu { list-style: none; flex: 1; padding: 12px 0; }
.nav-menu li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  color: rgba(255,255,255,0.65);
  transition: all var(--transition);
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  margin: 1px 0;
}
.nav-menu li a:hover {
  background: rgba(255,255,255,0.08);
  color: white;
  text-decoration: none;
}
.nav-menu li a.active {
  background: rgba(59,130,246,0.15);
  color: #93c5fd;
  border-left-color: var(--accent);
  font-weight: 600;
}
.nav-divider {
  padding: 20px 20px 8px;
  font-size: 10px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  letter-spacing: 1.5px;
  font-weight: 700;
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.sidebar-footer .btn {
  width: 100%;
  text-align: center;
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
}
.sidebar-footer .btn:hover { border-color: rgba(255,255,255,0.4); color: white; background: rgba(255,255,255,0.08); }

/* Mobile top bar & hamburger */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--primary);
  color: white;
  z-index: 1100;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  box-shadow: var(--shadow-md);
}
.mobile-topbar-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-xs);
  background: rgba(255,255,255,0.1);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 20px;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  flex-shrink: 0;
}
.mobile-toggle:hover { background: rgba(255,255,255,0.2); }
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  backdrop-filter: blur(2px);
}

/* ==================== Main Content ==================== */
.content {
  margin-left: var(--sidebar-width);
  padding: 28px 32px;
  min-height: 100vh;
  max-width: 1600px;
}
.content-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
}
.content-header h1 {
  font-size: 24px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: -0.3px;
}

/* ==================== Alerts ==================== */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideDown 0.3s ease;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
.alert-success { background: var(--success-light); color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: var(--danger-light); color: #991b1b; border: 1px solid #fecaca; }

/* ==================== Filter Bar ==================== */
.filter-bar {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.filter-form {
  background: var(--card-bg);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  align-items: end;
}
.filter-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.filter-group label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.filter-group select, .filter-group input[type="text"] {
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.filter-group select:focus, .filter-group input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
  background: white;
}
.filter-actions {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.period-label {
  font-weight: 700;
  color: var(--primary);
  margin-left: auto;
  font-size: 15px;
}

/* ==================== Summary Cards ==================== */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.summary-small .card { padding: 16px 20px; }
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.card-blue { border-left-color: var(--accent); }
.card-green { border-left-color: var(--success); }
.card-orange { border-left-color: var(--warning); }
.card-purple { border-left-color: var(--purple); }
.card-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.8px;
  margin-bottom: 8px;
  font-weight: 700;
}
.card-value { font-size: 24px; font-weight: 800; color: var(--text); letter-spacing: -0.5px; }
.card-sub { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ==================== Charts ==================== */
.charts-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}
.chart-box {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.chart-box h3 {
  font-size: 15px;
  margin-bottom: 16px;
  color: var(--primary);
  font-weight: 700;
}

/* ==================== Data Table ==================== */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.data-table thead {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
}
.data-table th {
  padding: 14px 16px;
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700;
  white-space: nowrap;
}
.data-table th.sortable {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 26px;
  transition: background 0.15s;
}
.data-table th.sortable:hover {
  background: rgba(255,255,255,0.1);
}
.data-table th.sortable::after {
  content: '\2195';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  opacity: 0.4;
}
.data-table th.sortable.sort-asc::after {
  content: '\2191';
  opacity: 0.9;
}
.data-table th.sortable.sort-desc::after {
  content: '\2193';
  opacity: 0.9;
}
.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-secondary);
  vertical-align: middle;
}
.data-table tbody tr {
  transition: background var(--transition);
}
.data-table tbody tr:hover { background: #f8fafc; }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tfoot {
  background: linear-gradient(135deg, #eef2ff 0%, #e8ecf4 100%);
  font-weight: 700;
}
.data-table tfoot th {
  padding: 14px 16px;
  text-align: left;
  font-size: 13px;
  color: var(--primary);
  text-transform: none;
  letter-spacing: 0;
}

/* ==================== Balance Cards ==================== */
.balance-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.balance-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.balance-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.balance-card.wide {
  grid-column: span 1;
  text-align: left;
}
.balance-name { font-weight: 700; font-size: 15px; margin-bottom: 4px; color: var(--text); }
.balance-type { font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
.balance-amount { font-size: 22px; font-weight: 800; color: var(--success); }
.balance-amount.negative { color: var(--danger); }
.balance-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.balance-details { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 12px; }
.balance-details small { display: block; color: var(--text-muted); font-size: 11px; margin-bottom: 2px; }
.balance-desc { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.balance-actions { display: flex; gap: 8px; }

/* ==================== Progress Bar ==================== */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 4px;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success), #34d399);
  border-radius: 99px;
  transition: width 0.5s ease;
}
.progress-fill.warning { background: linear-gradient(90deg, var(--warning), #fbbf24); }
.progress-fill.danger { background: linear-gradient(90deg, var(--danger), #f87171); }

/* ==================== Badge ==================== */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  background: #f1f5f9;
  color: var(--text-secondary);
  letter-spacing: 0.2px;
}
.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-green { background: var(--success-light); color: #065f46; }
.badge-red { background: var(--danger-light); color: #991b1b; }
.badge-purple { background: #ede9fe; color: #6d28d9; }
.badge-fixed {
  display: inline-block;
  min-width: 140px;
  text-align: center;
  box-sizing: border-box;
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #059669; color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; color: white; }
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-outline:hover { background: rgba(59,130,246,0.08); color: var(--accent); }
.btn-sm { padding: 6px 12px; font-size: 12px; border-radius: var(--radius-xs); }
.btn-block { display: flex; width: 100%; }

/* ==================== Forms ==================== */
.form-container {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  max-width: 800px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: white;
  color: var(--text);
}
.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}
.form-control::placeholder { color: var(--text-muted); }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.form-actions { display: flex; gap: 12px; margin-top: 28px; }
select.form-control { appearance: auto; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 80px; }

/* ==================== Section ==================== */
.section {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.section h3 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 16px;
  font-weight: 700;
}
.section .data-table { box-shadow: none; margin-bottom: 0; border-radius: var(--radius-sm); }
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

/* ==================== Pagination ==================== */
.pagination {
  display: flex;
  gap: 4px;
  justify-content: center;
  margin-top: 20px;
  flex-wrap: wrap;
}
.page-link {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition);
  background: white;
}
.page-link:hover {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.page-link.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* ==================== Utilities ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-warning { color: var(--warning) !important; }
.cell-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 0;
}
.actions { white-space: nowrap; }
.actions .btn { margin-right: 4px; }
.actions .btn:last-child { margin-right: 0; }

/* ==================== Responsive ==================== */

/* Tablets */
@media (max-width: 1024px) {
  .content { padding: 20px; }
  .summary-cards { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
  .charts-row { grid-template-columns: 1fr; }
  .balance-details { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile */
@media (max-width: 768px) {
  .mobile-topbar { display: flex; }
  .mobile-toggle { display: flex; }
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
  .content {
    margin-left: 0;
    padding: 72px 16px 16px;
  }
  .content-header h1 { font-size: 20px; }
  .filter-form { grid-template-columns: 1fr 1fr; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .period-label { margin-left: 0; text-align: center; }
  .summary-cards { grid-template-columns: 1fr 1fr; gap: 10px; }
  .card { padding: 16px; }
  .card-value { font-size: 18px; }
  .charts-row { grid-template-columns: 1fr; }
  .form-container { padding: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .form-actions { flex-direction: column; }
  .form-actions .btn { width: 100%; }
  .data-table th { padding: 10px 12px; font-size: 10px; }
  .data-table td { padding: 10px 12px; font-size: 12px; }
  .section { padding: 16px; }
  .balance-cards { grid-template-columns: 1fr; }
  .balance-details { grid-template-columns: repeat(2, 1fr); }
  .pagination { gap: 2px; }
  .page-link { padding: 6px 10px; font-size: 12px; }
  .btn { padding: 8px 14px; font-size: 12px; }
}

/* Small mobile */
@media (max-width: 480px) {
  .summary-cards { grid-template-columns: 1fr; }
  .content { padding: 64px 12px 12px; }
  .login-box { padding: 32px 24px; }
}