:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1c1e21;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --paid: #16a34a;
  --paid-bg: #dcfce7;
  --overdue: #dc2626;
  --overdue-bg: #fee2e2;
  --soon: #d97706;
  --soon-bg: #fef3c7;
  --tag-auto: #7c3aed;
  --tag-auto-bg: #ede9fe;
  --tag-recurring: #0e7490;
  --tag-recurring-bg: #cffafe;
  --tag-user: #b45309;
  --tag-user-bg: #fef3c7;
  --form-bg: #e5e7eb;
  --field-bg: #ffffff;
  --field-text: #14161a;
  --field-border: #c6cbd3;
  --card-bg-duplicate: #f8f6ff;
}

:root[data-theme="dark"] {
  --bg: #0f1115;
  --card-bg: #1a1d24;
  --text: #e8eaed;
  --muted: #9aa1ac;
  --border: #2b2f38;
  --primary: #3b82f6;
  --primary-dark: #60a5fa;
  --danger: #f87171;
  --danger-bg: #3f1d1d;
  --paid: #4ade80;
  --paid-bg: #14291b;
  --overdue: #f87171;
  --overdue-bg: #3f1d1d;
  --soon: #fbbf24;
  --soon-bg: #3a2e0f;
  --tag-auto: #c4b5fd;
  --tag-auto-bg: #2e1f4d;
  --tag-recurring: #67e8f9;
  --tag-recurring-bg: #113a42;
  --tag-user: #fcd34d;
  --tag-user-bg: #3a2e0f;
  --form-bg: var(--card-bg);
  --field-bg: #ffffff;
  --field-text: #14161a;
  --field-border: #c6cbd3;
  --card-bg-duplicate: #55565B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }
.muted { color: var(--muted); }

.error {
  color: var(--danger);
  background: var(--danger-bg);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
}

/* Login */
#login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.login-card {
  background: var(--form-bg);
  padding: 32px 24px;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-card h1 { margin: 0; }

.login-card input {
  padding: 12px 14px;
  border: 1px solid var(--field-border);
  border-radius: 10px;
  font-size: 1rem;
  background: var(--field-bg);
  color: var(--field-text);
}

#login-submit-btn {
  padding: 16px;
  font-size: 1.05rem;
}

/* Topbar */
.topbar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-title-text {
  margin: 0;
  font-size: 1.4rem;
  text-align: center;
}

.topbar-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

@media (max-width: 480px) {
  .topbar-buttons .btn {
    padding: 6px 10px;
    font-size: 0.82rem;
  }
  .topbar-buttons .icon-btn {
    padding: 6px 9px;
    font-size: 0.95rem;
  }
}

.btn {
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
}

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

.btn.ghost {
  background: transparent;
}

.btn.danger {
  background: var(--danger-bg);
  border-color: var(--danger-bg);
  color: var(--danger);
}

.btn.link {
  background: transparent;
  border: none;
  color: var(--primary);
  padding: 6px 4px;
  text-decoration: underline;
  font-size: 0.85rem;
}

.btn.danger-link {
  color: var(--danger);
  align-self: flex-start;
}

/* Month navigation */
.month-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  max-width: 900px;
  margin: 0 auto;
  padding: 12px 16px 0;
}

.month-arrow {
  font-size: 1.1rem;
  padding: 8px 14px;
  line-height: 1;
}

.month-nav-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

#month-label {
  font-weight: 600;
  font-size: 1.1rem;
}

.bills-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
}

.bills-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bill-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.bill-card:hover {
  border-color: var(--primary);
}

.bill-card.duplicate-match {
  background: var(--card-bg-duplicate);
}

.bill-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.bill-name {
  font-weight: 600;
  font-size: 1.05rem;
}

.status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.status-paid { color: var(--paid); background: var(--paid-bg); }
.status-overdue { color: var(--overdue); background: var(--overdue-bg); }
.status-soon { color: var(--soon); background: var(--soon-bg); }
.status-pending { color: var(--muted); background: var(--bg); }

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.tag-auto { color: var(--tag-auto); background: var(--tag-auto-bg); }
.tag-recurring { color: var(--tag-recurring); background: var(--tag-recurring-bg); }
.tag-user { color: var(--tag-user); background: var(--tag-user-bg); }

/* Tag chip pickers (bill form) and chip lists (collection form) */
.tag-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 2px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--field-border);
  background: var(--field-bg);
  color: var(--field-text);
  font-size: 0.85rem;
  cursor: pointer;
}

.tag-chip.selected {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.tag-chip-remove {
  background: transparent;
  border: none;
  color: inherit;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  opacity: 0.7;
}
.tag-chip-remove:hover {
  opacity: 1;
}

.tag-add-row {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}

.tag-add-row input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--field-border);
  border-radius: 8px;
  font-size: 0.9rem;
  background: var(--field-bg);
  color: var(--field-text);
}

.bill-details {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px 16px;
  font-size: 0.9rem;
}

.bill-details dt {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.bill-details dd {
  margin: 2px 0 0;
}

/* Compact bill row + expandable details */
.bill-compact-row {
  display: flex;
  align-items: center;
  gap: 8px 16px;
  flex-wrap: wrap;
}

.bill-compact-name {
  font-weight: 600;
  flex: 1 1 160px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bill-compact-due {
  color: var(--muted);
  font-size: 0.85rem;
  flex: 0 0 auto;
  white-space: nowrap;
}

.bill-compact-row .status-badge {
  margin-left: auto;
  flex: 0 0 auto;
}

.bill-expanded-details {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: max-height 0.3s ease, opacity 0.25s ease, margin-top 0.3s ease;
}

.bill-card.expanded .bill-expanded-details {
  max-height: 500px;
  opacity: 1;
  margin-top: 12px;
}

.bill-edit-row {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.bill-pay-btn {
  padding: 3px 10px;
  font-size: 0.8rem;
  background: #16a34a;
  border-color: #16a34a;
  color: #ffffff;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.bill-pay-btn:hover {
  background: #128a3e;
  border-color: #128a3e;
}

.bill-duplicate-btn {
  padding: 3px 10px;
  font-size: 0.8rem;
  background: #7c3aed;
  border-color: #7c3aed;
  color: #ffffff;
}
.bill-duplicate-btn:hover {
  background: #6d28d9;
  border-color: #6d28d9;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 50;
  padding: 0;
}

.modal-card {
  background: var(--form-bg);
  width: 100%;
  max-width: 480px;
  max-height: 92vh;
  overflow-y: auto;
  border-radius: 16px 16px 0 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-card h2 { margin: 0 0 4px; }

.modal-card label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.modal-card input,
.modal-card select,
.modal-card textarea {
  padding: 12px 14px;
  border: 1px solid var(--field-border);
  border-radius: 10px;
  font-size: 1rem;
  color: var(--field-text);
  background: var(--field-bg);
  font-family: inherit;
  resize: vertical;
}

.checkbox-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 1rem;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
}

.modal-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 4px 0;
}

.modal-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

.modal-actions-right {
  display: flex;
  gap: 8px;
}

@media (min-width: 640px) {
  .modal-backdrop {
    align-items: center;
  }
  .modal-card {
    border-radius: 16px;
  }
}

.icon-btn {
  font-size: 1.1rem;
  padding: 8px 12px;
  line-height: 1;
}

.search-wrapper {
  position: relative;
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--form-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.2);
  z-index: 30;
}

.search-input-wrapper {
  position: relative;
}

.search-dropdown input {
  padding: 10px 34px 10px 12px;
  border: 1px solid var(--field-border);
  border-radius: 8px;
  font-size: 0.95rem;
  background: var(--field-bg);
  color: var(--field-text);
  width: 220px;
  max-width: 60vw;
}

@media (max-width: 640px) {
  .search-dropdown {
    position: fixed;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }
  .search-dropdown input {
    width: 80vw;
    max-width: 320px;
  }
}

.search-clear-btn {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  padding: 4px 6px;
}
.search-clear-btn:hover {
  color: var(--field-text);
}

/* Dashboard */
.dashboard-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px;
}

.dashboard-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.dashboard-heading h2 {
  margin: 0;
}

.collections-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.collection-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.collection-card:hover {
  border-color: var(--primary);
}

.collection-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.collection-name {
  font-weight: 600;
  font-size: 1.1rem;
}

.collection-edit-btn {
  padding: 3px 10px;
  font-size: 0.8rem;
  background: #FF5813;
  border-color: #FF5813;
  color: #ffffff;
}
.collection-edit-btn:hover {
  background: #e64d0d;
  border-color: #e64d0d;
}

#logout-btn,
#dashboard-logout-btn,
#back-to-dashboard-btn,
#dark-toggle-dashboard,
#dark-toggle-app,
#search-toggle-btn {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text);
}
#logout-btn:hover,
#dashboard-logout-btn:hover,
#back-to-dashboard-btn:hover,
#dark-toggle-dashboard:hover,
#dark-toggle-app:hover,
#search-toggle-btn:hover {
  background: var(--border);
}

.collection-notes {
  font-size: 0.9rem;
  color: var(--muted);
  white-space: pre-wrap;
}

.collection-count {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 4px;
}

/* Spending chart */
.spending-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 32px 0 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.spending-heading h2 {
  margin: 0;
}

.spending-heading-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.spending-year-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.spending-year-nav .month-arrow {
  padding: 6px 10px;
  font-size: 1rem;
}

#spending-year-label {
  font-weight: 600;
  min-width: 44px;
  text-align: center;
}

.spending-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 14px;
}

.spending-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--muted);
}

.spending-legend-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  flex: 0 0 auto;
}

.spending-tooltip {
  display: inline-block;
  margin: 0 0 14px;
  padding: 8px 14px;
  background: var(--form-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.spending-chart-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 16px 12px;
  overflow-x: auto;
}

.spending-chart {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  height: 190px;
  min-width: min-content;
}

.spending-bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  height: 100%;
  justify-content: flex-end;
}

.spending-bar-track {
  display: flex;
  align-items: flex-end;
  height: 150px;
}

.spending-bar-cluster {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 150px;
}

.spending-bar {
  width: 28px;
  border-radius: 4px 4px 0 0;
  cursor: pointer;
  transition: opacity 0.15s;
  min-height: 2px;
}
.spending-bar:hover {
  opacity: 0.75;
}

.spending-bar-value {
  font-size: 0.72rem;
  color: var(--text);
  white-space: nowrap;
}

.spending-bar-label {
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
}

/* Spending by Tag chart */
.tag-spending-scope-select {
  padding: 8px 10px;
  border: 1px solid var(--field-border);
  border-radius: 8px;
  background: var(--field-bg);
  color: var(--field-text);
  font-size: 0.85rem;
}

.tag-spending-chart {
  align-items: center;
}

.tag-donut-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.tag-donut-svg {
  width: 220px;
  height: 220px;
}

.tag-chart-segment {
  cursor: pointer;
  transition: opacity 0.15s;
}
.tag-chart-segment:hover {
  opacity: 0.8;
}

.tag-donut-total {
  fill: var(--text);
  font-size: 20px;
  font-weight: 700;
}

.tag-stack {
  display: flex;
  flex-direction: column-reverse;
  width: 28px;
}

.tag-stack-segment {
  width: 100%;
  min-height: 2px;
}
.tag-stack-segment:last-child {
  border-radius: 4px 4px 0 0;
}