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

:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius: 12px;
}

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

/* ===== LOGIN PAGE ===== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a8a 0%, #1a56db 50%, #0ea5e9 100%);
  padding: 20px;
}

.login-card {
  background: var(--card);
  border-radius: 16px;
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-card .logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-card .logo h1 {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 4px;
}

.login-card .logo p {
  color: var(--muted);
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
  color: var(--text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}

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

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-success:hover {
  background: #047857;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: #b91c1c;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--text);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.login-error {
  background: #fef2f2;
  color: var(--danger);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-bottom: 16px;
  display: none;
}

.login-hint {
  text-align: center;
  margin-top: 20px;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ===== DASHBOARD ===== */
.dashboard {
  display: none;
  min-height: 100vh;
}

.dashboard.active {
  display: block;
}

.navbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.navbar .brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.navbar .user-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar .user-area span {
  font-size: 0.875rem;
  color: var(--muted);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Balance Cards */
.balance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.balance-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.balance-card.opening { border-left-color: #8b5cf6; }
.balance-card.brac { border-left-color: #059669; }
.balance-card.scb { border-left-color: #0284c7; }
.balance-card.mtb { border-left-color: #d97706; }
.balance-card.bkash { border-left-color: #e11d48; }
.balance-card.total {
  border-left-color: var(--primary);
  background: linear-gradient(135deg, #1e3a8a, #1a56db);
  color: #fff;
}

.balance-card.total .label,
.balance-card.total .amount {
  color: #fff;
}

.balance-card .label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.balance-card .amount {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

/* Action Panels */
.panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.panel {
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.panel h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel h3 .icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.panel.income h3 .icon { background: #d1fae5; color: var(--success); }
.panel.expense h3 .icon { background: #fee2e2; color: var(--danger); }
.panel.transfer h3 .icon { background: #dbeafe; color: var(--primary); }

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

.form-row .full {
  grid-column: 1 / -1;
}

/* Transactions Table */
.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.table-wrap {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

thead {
  background: #f8fafc;
}

th {
  padding: 12px 14px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 12px 14px;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:hover {
  background: #f8fafc;
}

tbody tr:last-child td {
  border-bottom: none;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-income {
  background: #d1fae5;
  color: #065f46;
}

.badge-expense {
  background: #fee2e2;
  color: #991b1b;
}

.badge-transfer {
  background: #dbeafe;
  color: #1e40af;
}

.amount-positive {
  color: var(--success);
  font-weight: 600;
}

.amount-negative {
  color: var(--danger);
  font-weight: 600;
}

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

.empty-state p {
  margin-top: 8px;
}

.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.filter-bar select,
.filter-bar input {
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.875rem;
  background: #fff;
}

/* Modal / Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text);
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 999;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

/* Responsive */
@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .balance-grid {
    grid-template-columns: 1fr 1fr;
  }

  .navbar {
    padding: 10px 14px;
  }

  .container {
    padding: 16px 12px;
  }

  table {
    font-size: 0.8rem;
  }

  th, td {
    padding: 8px 10px;
  }
}