:root, [data-theme="light"] {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --primary-light: #ccfbf1;
  --primary-text: #115e59;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --warning: #d97706;
  --warning-bg: #fef3c7;
  --info: #2563eb;
  --info-bg: #dbeafe;
  --transfer: #7c3aed;
  --transfer-bg: #ede9fe;
  --input-border: #cbd5e1;
  --input-focus: #0d9488;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --radius-sm: 8px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0f17;
    --card-bg: #151d2a;
    --card-border: #233044;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --primary: #14b8a6;
    --primary-hover: #2dd4bf;
    --primary-light: #134e48;
    --primary-text: #5eead4;
    --success: #22c55e;
    --success-bg: #14532d;
    --danger: #ef4444;
    --danger-bg: #7f1d1d;
    --warning: #f59e0b;
    --warning-bg: #78350f;
    --info: #3b82f6;
    --info-bg: #1e3a8a;
    --transfer: #a78bfa;
    --transfer-bg: #3b1d75;
    --input-border: #334155;
    --input-focus: #14b8a6;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  }
}

[data-theme="dark"] {
  --bg: #0b0f17;
  --card-bg: #151d2a;
  --card-border: #233044;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #14b8a6;
  --primary-hover: #2dd4bf;
  --primary-light: #134e48;
  --primary-text: #5eead4;
  --success: #22c55e;
  --success-bg: #14532d;
  --danger: #ef4444;
  --danger-bg: #7f1d1d;
  --warning: #f59e0b;
  --warning-bg: #78350f;
  --info: #3b82f6;
  --info-bg: #1e3a8a;
  --transfer: #a78bfa;
  --transfer-bg: #3b1d75;
  --input-border: #334155;
  --input-focus: #14b8a6;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header & Navbar */
.app-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  padding: 10px 16px;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.header-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
  text-decoration: none;
}
.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}
.user-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}
.user-badge {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  padding: 6px 10px;
  border-radius: 20px;
  border: 1px solid var(--card-border);
}

/* Desktop Navigation */
.nav-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg);
  padding: 4px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
}
.tab-btn {
  background: none;
  border: none;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  background: var(--card-bg);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Smartphone Mobile Bottom Navigation Bar */
.mobile-bottom-nav {
  display: none;
}
@media (max-width: 768px) {
  .nav-tabs { display: none; }
  .user-badge { display: none; }
  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-top: 1px solid var(--card-border);
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
    justify-content: space-around;
  }
  .mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 6px 0;
    cursor: pointer;
    border-radius: 8px;
    min-height: 48px;
  }
  .mobile-nav-item.active {
    color: var(--primary);
    background: var(--primary-light);
  }
  .mobile-nav-icon {
    font-size: 1.25rem;
  }
  main.container {
    padding-bottom: 84px !important;
  }
}

/* Main Container */
main.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 16px 50px;
}

/* Month Navigation Bar */
.month-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 8px;
}
.month-title {
  font-size: 1.1rem;
  font-weight: 700;
}
.month-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}
.month-btn {
  background: var(--bg);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 36px;
}
.month-btn:hover { background: var(--card-border); }

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
}
.metric-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.metric-val {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
@media (max-width: 480px) {
  .metric-val { font-size: 1.25rem; }
}
.val-positive { color: var(--success); }
.val-negative { color: var(--danger); }
.val-neutral { color: var(--text); }
.val-transfer { color: var(--transfer); }
.metric-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Accounts Horizontal / Grid Widget */
.accounts-widget {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.account-card-mini {
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.account-mini-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
}
.account-mini-val {
  font-size: 1.15rem;
  font-weight: 700;
}

/* Cards & Layout */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
@media (max-width: 480px) {
  .card { padding: 16px; margin-bottom: 14px; }
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}
.card-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
}

/* Two-column layout */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 820px) {
  .grid-2 { grid-template-columns: 1fr; }
}

/* Forms & Inputs */
label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--input-border);
  background: var(--card-bg);
  color: var(--text);
  font: inherit;
  font-size: 16px; /* 16px prevents iOS Safari automatic page zoom */
  margin-bottom: 12px;
  min-height: 44px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.2);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; gap: 0; }
}

/* Password field with show/hide eye toggle button */
.pwd-wrapper {
  position: relative;
  width: 100%;
  margin-bottom: 12px;
}
.pwd-wrapper input {
  padding-right: 48px;
  margin-bottom: 0;
}
.pwd-toggle-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none !important;
  border: none !important;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1.15rem;
  color: var(--text-muted);
  min-height: 36px;
  min-width: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: none !important;
  border-radius: var(--radius-sm);
  z-index: 2;
}
.pwd-toggle-btn:hover {
  color: var(--text);
}

/* 3-Option Segmented Control (Expense / Income / Transfer) */
.type-toggle {
  display: flex;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 16px;
  gap: 4px;
}
.type-option {
  flex: 1;
  text-align: center;
  padding: 10px 8px;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  background: none;
  color: var(--text-muted);
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}
.type-option.active.expense {
  background: var(--danger-bg);
  color: var(--danger);
}
.type-option.active.income {
  background: var(--success-bg);
  color: var(--success);
}
.type-option.active.transfer {
  background: var(--transfer-bg);
  color: var(--transfer);
}

/* Theme Selector Buttons in Settings */
.theme-picker {
  display: flex;
  gap: 8px;
  margin: 12px 0 20px;
}
.theme-btn {
  flex: 1;
  padding: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 2px solid var(--card-border);
  background: var(--bg);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 48px;
}
.theme-btn.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-text);
}

/* Buttons */
button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  min-height: 44px;
  transition: background 0.15s ease, transform 0.05s ease;
}
button:active { transform: scale(0.98); }
.btn-primary { background: var(--primary); color: #ffffff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text);
}
.btn-outline:hover { background: var(--bg); }
.btn-edit { background: var(--bg); border: 1px solid var(--card-border); color: var(--text); }
.btn-edit:hover { background: var(--primary-light); color: var(--primary-text); border-color: var(--primary); }
.btn-danger { background: var(--danger-bg); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 10px; font-size: 0.8rem; min-height: 34px; }
.action-btns { display: inline-flex; gap: 6px; justify-content: flex-end; align-items: center; flex-wrap: wrap; }

/* Tables */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}
th {
  background: var(--bg);
  padding: 10px 12px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
}
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--card-border);
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(0, 0, 0, 0.015); }

/* Responsive Mobile Cards for Transactions */
@media (max-width: 640px) {
  .desktop-table { display: none; }
  .mobile-tx-list { display: flex; flex-direction: column; gap: 8px; }
  .mobile-tx-card {
    background: var(--bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .mobile-tx-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .mobile-tx-mid {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
  }
  .mobile-tx-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: var(--text-muted);
  }
}
@media (min-width: 641px) {
  .mobile-tx-list { display: none; }
}

/* Badges */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.badge-income { background: var(--success-bg); color: var(--success); }
.badge-expense { background: var(--danger-bg); color: var(--danger); }
.badge-transfer { background: var(--transfer-bg); color: var(--transfer); }
.badge-pending, .badge-paused { background: var(--warning-bg); color: var(--warning); }
.badge-approved { background: var(--success-bg); color: var(--success); }
.badge-rejected, .badge-suspended { background: var(--danger-bg); color: var(--danger); }
.badge-admin { background: var(--primary-light); color: var(--primary-text); }
.badge-neutral { background: var(--bg); border: 1px solid var(--card-border); color: var(--text-muted); }
.badge-person { background: #fef08a; color: #854d0e; }

/* Progress Bars */
.progress-container { margin: 10px 0; }
.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.progress-bar-bg {
  width: 100%;
  height: 10px;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  overflow: hidden;
}
.progress-bar-fill { height: 100%; border-radius: 999px; transition: width 0.3s ease; }
.fill-ok { background: var(--success); }
.fill-warn { background: var(--warning); }
.fill-danger { background: var(--danger); }

/* Alerts */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-size: 0.88rem;
}
.alert-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }

/* Auth Wrapper */
.auth-wrapper {
  max-width: 440px;
  margin: 40px auto;
  padding: 0 16px;
}
.auth-header { text-align: center; margin-bottom: 20px; }
.auth-header h1 { font-size: 1.6rem; font-weight: 800; margin-top: 6px; }

/* Empty States */
.empty-state { text-align: center; padding: 32px 16px; color: var(--text-muted); }
.empty-state-icon { font-size: 2.2rem; margin-bottom: 8px; }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  align-items: center;
}
.filter-bar select, .filter-bar input {
  width: auto;
  min-width: 140px;
  margin-bottom: 0;
  padding: 6px 10px;
}

/* Print & PDF Export Styles */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 11pt;
  }
  .app-header, .mobile-bottom-nav, .month-controls, #tx-form, .filter-bar,
  .action-btns, button, .theme-picker, #manage-accs-btn, #view-all-tx,
  #export-csv, #export-pdf, .btn-danger, .btn-edit {
    display: none !important;
  }
  .container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .card {
    background: #ffffff !important;
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    margin-bottom: 15px !important;
  }
  .table-wrap {
    overflow: visible !important;
  }
  table {
    width: 100% !important;
    border-collapse: collapse !important;
  }
  th, td {
    border-bottom: 1px solid #e2e8f0 !important;
    padding: 6px 8px !important;
    font-size: 10pt !important;
  }
  th {
    background: #f8fafc !important;
    color: #334155 !important;
  }
  .badge {
    border: 1px solid #94a3b8 !important;
    background: transparent !important;
    color: #000000 !important;
  }
}