:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface2: #243044;
  --border: #2d3a4f;
  --text: #e8eef7;
  --text-muted: #8b9bb4;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 28px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  color: white;
}

.logo h1 {
  font-size: 18px;
  font-weight: 700;
}

.logo p {
  font-size: 12px;
  color: var(--text-muted);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  width: 100%;
}

.nav-btn:hover {
  background: var(--surface2);
  color: var(--text);
}

.nav-btn.active {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
}

.nav-btn .icon {
  font-size: 18px;
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* Main */
.main {
  flex: 1;
  margin-left: 260px;
  padding: 28px 32px;
  max-width: 1400px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.header h2 {
  font-size: 26px;
  font-weight: 700;
}

/* Views */
.view {
  display: none;
}

.view.active {
  display: block;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

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

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

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

.stat-card .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

.stat-card .sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.stat-card.primary .value { color: var(--primary); }
.stat-card.success .value { color: var(--success); }
.stat-card.warning .value { color: var(--warning); }

/* Tables */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tr:hover td {
  background: rgba(255,255,255,0.02);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger, .btn-sm {
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

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

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn-sm {
  padding: 6px 10px;
  font-size: 12px;
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Form elements */
.select, input[type="text"], input[type="number"], textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  width: 100%;
}

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

label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* Denomination grid */
.denom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.denom-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  position: relative;
}

.denom-card .value {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}

.denom-card .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.denom-card .delete-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  opacity: 0.6;
}

.denom-card .delete-btn:hover {
  opacity: 1;
  color: var(--danger);
}

/* Denomination inputs in forms */
.denom-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  max-height: 280px;
  overflow-y: auto;
  padding: 4px;
}

.denom-input-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}

.denom-input-item label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.denom-input-item input {
  text-align: center;
  font-size: 16px;
  font-weight: 600;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

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

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 17px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}

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

.modal-body {
  padding: 22px;
}

.modal-footer {
  padding: 16px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.badge-muted {
  background: rgba(139, 155, 180, 0.15);
  color: var(--text-muted);
}

.badge-primary {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
}

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

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

/* Empty state */
.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty p {
  margin-top: 8px;
  font-size: 14px;
}

/* Report breakdown */
.breakdown-section {
  margin-bottom: 28px;
}

.breakdown-section h4 {
  font-size: 15px;
  margin-bottom: 12px;
  color: var(--text);
}

.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}

.breakdown-item {
  background: var(--surface2);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}

.breakdown-item .denom {
  font-size: 13px;
  color: var(--text-muted);
}

.breakdown-item .qty {
  font-size: 18px;
  font-weight: 700;
  margin: 4px 0;
}

.breakdown-item .amt {
  font-size: 12px;
  color: var(--primary);
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    width: 70px;
    padding: 16px 8px;
  }
  .logo div:last-child,
  .nav-btn span:not(.icon),
  .sidebar-footer {
    display: none;
  }
  .logo {
    justify-content: center;
    padding-bottom: 16px;
  }
  .nav-btn {
    justify-content: center;
    padding: 12px;
  }
  .main {
    margin-left: 70px;
    padding: 20px 16px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .btn-group {
    width: 100%;
  }
  .btn-group button {
    flex: 1;
  }
}

/* Login */
.login-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}
.login-screen.hidden { display: none; }
.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
}

/* Toast */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 3000;
  padding: 14px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  max-width: 360px;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
}
.toast.hidden { display: none; }
.toast.success { background: #166534; color: #bbf7d0; border: 1px solid #22c55e; }
.toast.error { background: #7f1d1d; color: #fecaca; border: 1px solid #ef4444; }
.toast.info { background: #1e3a5f; color: #bfdbfe; border: 1px solid #3b82f6; }
@keyframes slideIn {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.app.hidden { display: none; }

/* Status badges for logs */
.badge-error { background: rgba(239,68,68,0.15); color: var(--danger); }