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

:root {
  --bg: #0f0f23;
  --bg-card: #16213e;
  --bg-card-hover: #1a2742;
  --bg-elevated: #1a2540;
  --bg-input: #0d1b2a;
  --border: #1e3a5f;
  --text: #e0e0e0;
  --text-muted: #8892a4;
  --text-dim: #5a6478;
  --accent: #00d4aa;
  --accent-hover: #00b894;
  --accent-glow: rgba(0, 212, 170, 0.1);
  --primary: #4a6cf7;
  --primary-hover: #3b5de7;
  --danger: #ff6b6b;
  --danger-hover: #ee5a5a;
  --warning: #ffc107;
  --positive: #00d4aa;
  --negative: #ff6b6b;
  --sidebar-w: 230px;
  --topbar-h: 60px;
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --shadow: 0 2px 12px rgba(0,0,0,0.2);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.3);
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  padding: 4px 8px;
}

.logo-icon { width: 32px; height: 32px; flex-shrink: 0; }

.logo-text { display: flex; flex-direction: column; }

.logo-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.3px;
}

.logo-tagline {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-link:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.nav-link.active { background: var(--accent-glow); color: var(--accent); }

.nav-icon { width: 18px; height: 18px; flex-shrink: 0; }

.nav-spacer { flex: 1; }

.sidebar-btn {
  width: 100%;
  margin-top: 4px;
  font-size: 12.5px;
}

/* Topbar */
.topbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-w);
  right: 0;
  height: var(--topbar-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 50;
}

.topbar h1 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

/* Search */
.search-box {
  position: relative;
  width: 280px;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-dim);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 8px 12px 8px 34px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus { border-color: var(--accent); }
.search-box input::placeholder { color: var(--text-dim); }

.search-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  max-height: 280px;
  overflow-y: auto;
  z-index: 200;
}

.search-dropdown.hidden { display: none; }

.search-result-item {
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg-card-hover); }
.search-result-item .sr-name { font-weight: 500; }
.search-result-item .sr-balance { font-weight: 600; font-size: 12px; }

/* Main content */
#app {
  margin-left: var(--sidebar-w);
  margin-top: var(--topbar-h);
  padding: 28px 32px;
  flex: 1;
  min-height: calc(100vh - var(--topbar-h));
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-accent { background: var(--accent); color: #0f0f23; }
.btn-accent:hover { background: var(--accent-hover); box-shadow: 0 0 16px rgba(0,212,170,0.25); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.btn-outline { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Stat Cards */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.stat-card .stat-content { flex: 1; }

.stat-card .stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  font-weight: 500;
}

.stat-card .stat-value {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.stat-card .stat-value.positive { color: var(--positive); }
.stat-card .stat-value.negative { color: var(--negative); }

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg { width: 20px; height: 20px; }
.stat-icon.green { background: rgba(0,212,170,0.12); color: var(--accent); }
.stat-icon.blue { background: rgba(74,108,247,0.12); color: var(--primary); }
.stat-icon.red { background: rgba(255,107,107,0.12); color: var(--danger); }
.stat-icon.yellow { background: rgba(255,193,7,0.12); color: var(--warning); }

/* Dashboard grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

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

.chart-card .chart-title {
  font-size: 14px;
  font-weight: 600;
}

.chart-canvas-wrap {
  position: relative;
  height: 250px;
}

/* Widgets */
.widget-stack { display: flex; flex-direction: column; gap: 16px; }

.widget-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  flex: 1;
}

.widget-card .widget-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.widget-list { display: flex; flex-direction: column; gap: 8px; }

.widget-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 13px;
  cursor: pointer;
}

.widget-item:hover .wi-name { color: var(--accent); }
.widget-item .wi-name { font-weight: 500; transition: color 0.15s; }
.widget-item .wi-value { font-weight: 600; font-size: 12px; }

.alert-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  font-size: 13px;
  border-left: 3px solid var(--danger);
  background: rgba(255,107,107,0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  cursor: pointer;
}

.alert-item:hover { background: rgba(255,107,107,0.1); }
.alert-item .wi-name { font-weight: 500; }
.alert-item .wi-value { color: var(--danger); font-weight: 600; font-size: 12px; }

.all-good {
  color: var(--accent);
  font-size: 13px;
  padding: 12px 0;
  text-align: center;
}

/* Client grid */
.client-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s;
}

.client-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,212,170,0.08);
}

.client-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
}

.client-card .client-name {
  font-size: 15px;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
  margin-top: 6px;
}

.status-dot.active { background: var(--accent); box-shadow: 0 0 6px rgba(0,212,170,0.4); }
.status-dot.inactive { background: var(--warning); box-shadow: 0 0 6px rgba(255,193,7,0.3); }
.status-dot.overdue { background: var(--danger); box-shadow: 0 0 6px rgba(255,107,107,0.3); }

.client-card .client-label {
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg);
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  margin-bottom: 10px;
}

.client-meta {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.client-card .client-balance {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.client-card .client-balance.positive { color: var(--positive); }
.client-card .client-balance.negative { color: var(--negative); }

.client-card.client-inactive {
  opacity: 0.55;
  border-style: dashed;
}

.client-card.client-inactive:hover { opacity: 0.8; }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-bar select,
.filter-bar input[type="date"] {
  padding: 6px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 12px;
  font-family: var(--font);
  outline: none;
}

.filter-bar select:focus,
.filter-bar input:focus { border-color: var(--accent); }

.filter-bar .filter-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-weight: 500;
}

/* Section headers */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section {
  margin-bottom: 24px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

/* Tables */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

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

th {
  text-align: left;
  padding: 11px 16px;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.15);
}

td {
  padding: 11px 16px;
  font-size: 13px;
  border-bottom: 1px solid rgba(30,58,95,0.4);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.badge-charge { background: rgba(255,107,107,0.12); color: var(--negative); }
.badge-payment { background: rgba(0,212,170,0.12); color: var(--positive); }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.page-btn {
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.15s;
}

.page-btn:hover { border-color: var(--accent); color: var(--accent); }
.page-btn.active { background: var(--accent); color: #0f0f23; border-color: var(--accent); }

/* Budget progress */
.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}

.progress-fill.ok { background: var(--accent); }
.progress-fill.warn { background: var(--warning); }
.progress-fill.over { background: var(--danger); }

.budget-info {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Client detail */
.client-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.back-link {
  color: var(--text-muted) !important;
  text-decoration: none !important;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
  transition: color 0.15s;
}

.back-link:hover { color: var(--accent) !important; }

.balance-display {
  font-size: 34px;
  font-weight: 700;
  margin-top: 6px;
  letter-spacing: -0.5px;
}

.detail-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Month selector */
.month-selector {
  display: flex;
  align-items: center;
  gap: 10px;
}

.month-selector .month-display {
  font-size: 14px;
  font-weight: 600;
  min-width: 130px;
  text-align: center;
}

.month-selector button {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-family: var(--font);
  transition: all 0.15s;
}

.month-selector button:hover { border-color: var(--accent); color: var(--accent); }

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(6px);
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 460px;
  animation: slideUp 0.2s ease;
  box-shadow: var(--shadow-lg);
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

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

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.modal-close:hover { color: var(--text); }

/* Forms */
.form-group { margin-bottom: 14px; }

.form-group label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 5px;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group select { appearance: none; cursor: pointer; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
}

/* Toggle */
.toggle-group {
  display: flex;
  background: var(--bg);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.toggle-group button {
  flex: 1;
  padding: 8px 16px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s;
}

.toggle-group button.active {
  background: var(--accent);
  color: #0f0f23;
}

/* Toast */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 13px;
  animation: slideIn 0.3s ease;
  min-width: 250px;
  box-shadow: var(--shadow);
}

.toast.success { border-left: 3px solid var(--accent); }
.toast.error { border-left: 3px solid var(--danger); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-dim);
}

.empty-state .empty-icon {
  font-size: 40px;
  margin-bottom: 10px;
  opacity: 0.3;
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 400px 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
}

@keyframes shimmer {
  0% { background-position: -200px 0; }
  100% { background-position: 200px 0; }
}

.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.skeleton-text {
  height: 14px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.skeleton-lg { height: 28px; }

/* Loading */
.loading {
  display: flex;
  justify-content: center;
  padding: 48px;
  color: var(--text-dim);
  font-size: 13px;
}

/* Print */
@media print {
  .sidebar, .topbar, .btn, .search-box, .filter-bar, .pagination, #modal-overlay, #toast-container { display: none !important; }
  #app { margin: 0 !important; padding: 20px !important; }
  body { background: #fff; color: #000; }
  .stat-card, .table-container, .chart-card, .widget-card { background: #fff; border: 1px solid #ddd; }
  .stat-value, td, th { color: #000 !important; }
  .badge { border: 1px solid #999; }
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    flex-direction: row;
    padding: 8px 12px;
    gap: 4px;
    align-items: center;
    border-right: none;
    border-top: 1px solid var(--border);
  }

  .logo, .nav-spacer, .logo-tagline { display: none; }
  .nav-link { font-size: 11px; padding: 8px; gap: 4px; }
  .sidebar-btn { width: auto; font-size: 11px; padding: 6px 10px; }

  .topbar {
    left: 0;
    padding: 0 16px;
  }

  .search-box { width: 160px; }

  #app {
    margin-left: 0;
    padding: 16px;
    padding-bottom: 80px;
  }

  .stats-row { grid-template-columns: 1fr 1fr; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .client-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}