:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-border: #e2e8f0;
  --color-income: #16a34a;
  --color-expense: #dc2626;
  --shadow: 0 1px 3px rgb(15 23 42 / 0.08);
  --radius: 0.75rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --shadow: 0 1px 3px rgb(0 0 0 / 0.3);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: max(1rem, env(safe-area-inset-top)) max(1.25rem, env(safe-area-inset-right)) 1rem
    max(1.25rem, env(safe-area-inset-left));
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.header__title {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin: 0;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.header__logo {
  display: block;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
}

.btn--menu {
  position: relative;
  z-index: 110;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-width: 2.75rem;
  padding: 0;
  border: none;
  border-radius: 0.5rem;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn--menu:hover {
  background: color-mix(in srgb, var(--color-primary) 10%, var(--color-surface));
}

.btn--menu:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn--menu[aria-expanded="true"] {
  background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface));
}

.menu-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.125rem;
  height: 0.875rem;
}

.menu-icon__svg {
  display: block;
  overflow: visible;
}

.menu-icon__line {
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn--menu[aria-expanded="true"] .menu-icon__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.btn--menu[aria-expanded="true"] .menu-icon__line:nth-child(2) {
  opacity: 0;
}

.btn--menu[aria-expanded="true"] .menu-icon__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.header-menu {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 105;
  width: min(18rem, 88vw);
  height: 100dvh;
  padding: calc(4.5rem + env(safe-area-inset-top)) max(1.25rem, env(safe-area-inset-right))
    max(1.5rem, env(safe-area-inset-bottom)) 1.25rem;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: -4px 0 24px rgb(15 23 42 / 0.12);
  flex-direction: column;
  gap: 1.25rem;
  transform: translateX(100%);
  transition: transform 0.2s ease;
  pointer-events: none;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.header-menu[hidden] {
  display: none;
}

.header-menu:not([hidden]) {
  display: flex;
  transform: translateX(0);
  pointer-events: auto;
}

.header-menu__section {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.header-menu__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.header-menu__control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.header-menu__control:hover {
  border-color: color-mix(in srgb, var(--color-primary) 35%, var(--color-border));
}

.header-menu__control:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.header-menu select.header-menu__control {
  appearance: none;
  padding-right: 2.25rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M3 4.5 6 8 9 4.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

.header-menu button.header-menu__control {
  text-align: left;
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgb(15 23 42 / 0.4);
}

.menu-backdrop[hidden] {
  display: none;
}

.menu-backdrop:not([hidden]) {
  display: block;
}

.type-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  padding: 0.25rem;
  background: var(--color-bg);
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
}

.type-toggle__btn {
  padding: 0.625rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: 0.375rem;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.type-toggle__btn--active[data-type="expense"] {
  background: var(--color-expense);
  color: #fff;
}

.type-toggle__btn--active[data-type="income"] {
  background: var(--color-income);
  color: #fff;
}

.transaction-item__name {
  font-weight: 600;
}

.transaction-item__badge {
  display: inline-block;
  margin-top: 0.15rem;
  padding: 0.1rem 0.4rem;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: 0.25rem;
}

.transaction-item__badge--income {
  background: color-mix(in srgb, var(--color-income) 18%, transparent);
  color: var(--color-income);
}

.transaction-item__badge--expense {
  background: color-mix(in srgb, var(--color-expense) 18%, transparent);
  color: var(--color-expense);
}

.tabs {
  display: flex;
  gap: 0.25rem;
  padding: 0.5rem max(1.25rem, env(safe-area-inset-right)) 0 max(1.25rem, env(safe-area-inset-left));
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tabs__btn {
  flex: 1;
  min-width: max-content;
  padding: 0.625rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

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

.tabs__btn--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
}

.tab-panel--active {
  display: block;
  animation: tab-in 0.2s ease;
}

@keyframes tab-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0.75rem max(1.25rem, env(safe-area-inset-right)) max(1.25rem, env(safe-area-inset-bottom))
    max(1.25rem, env(safe-area-inset-left));
}

.balance {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.balance__label {
  margin: 0 0 0.25rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.balance__amount {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
}

.balance__amount--negative {
  color: var(--color-expense);
}

.balance__hint {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.overview-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.overview-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.875rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.overview-card__label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.overview-card__value {
  font-size: 1rem;
  font-weight: 700;
}

.overview-card__value--income {
  color: var(--color-income);
}

.overview-card__value--expense {
  color: var(--color-expense);
}

.quick-add {
  margin-top: 1rem;
}

.quick-add__form {
  padding: 1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.quick-add__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  align-items: end;
}

.form-group--compact label {
  font-size: 0.75rem;
}

.form-group--compact input,
.form-group--compact select {
  padding: 0.5rem 0.625rem;
  font-size: 0.9375rem;
}

.app-status {
  margin: 0;
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  text-align: center;
}

.app-status--error {
  background: #fef2f2;
  color: #b91c1c;
}

.app-status--warn {
  background: #fffbeb;
  color: #b45309;
}

.app-status--success {
  background: #f0fdf4;
  color: #15803d;
}

[data-theme="dark"] .app-status--error {
  background: #450a0a;
  color: #fca5a5;
}

[data-theme="dark"] .app-status--warn {
  background: #451a03;
  color: #fcd34d;
}

[data-theme="dark"] .app-status--success {
  background: #14532d;
  color: #86efac;
}

.section-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.tab-panel {
  padding-top: 0.125rem;
}

.tab-panel[data-panel="overview"] .balance {
  padding: 1.125rem 0.875rem;
  margin-bottom: 0.75rem;
}

.tab-panel[data-panel="overview"] .balance__amount {
  font-size: 1.75rem;
}

.tab-panel[data-panel="overview"] .balance__hint {
  margin-top: 0.35rem;
}

.tab-panel[data-panel="overview"] .overview-card {
  padding: 0.625rem 0.5rem;
}

.tab-panel[data-panel="overview"] .overview-card__value {
  font-size: 0.9375rem;
}

.tab-panel[data-panel="overview"] .quick-add {
  margin-top: 0.75rem;
}

.tab-panel[data-panel="overview"] .section-title {
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
}

.tab-panel[data-panel="overview"] .transaction-form {
  gap: 0.75rem;
  padding: 0.75rem;
}

.tab-panel[data-panel="overview"] .form-group {
  gap: 0.25rem;
}

.tab-panel[data-panel="overview"] .form-group label {
  font-size: 0.8125rem;
}

.tab-panel[data-panel="overview"] .form-group input,
.tab-panel[data-panel="overview"] .form-group select {
  padding: 0.5rem 0.625rem;
  font-size: 0.9375rem;
}

.tab-panel[data-panel="overview"] .type-toggle__btn {
  padding: 0.5rem 0.625rem;
  font-size: 0.875rem;
}

.transaction-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
}

.form-group input,
.form-group select {
  padding: 0.625rem 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  background: var(--color-bg);
  color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.form-error {
  font-size: 0.8125rem;
  color: var(--color-expense);
  min-height: 1.25em;
}

.btn {
  cursor: pointer;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  transition: background 0.15s;
}

.btn--primary {
  padding: 0.75rem 1rem;
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn--icon {
  padding: 0.5rem 0.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  font-size: 1.125rem;
}

.offline-status {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.chart-wrapper {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  min-height: 12rem;
}

#category-chart {
  display: block;
  width: 100%;
  height: 240px;
}

.stats-header {
  margin-bottom: 0.75rem;
}

.stats-header__hint {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.stats-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.stats-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.stats-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.625rem;
  padding: 0.75rem;
}

.stats-card__label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}

.stats-card__value {
  font-size: 1rem;
}

.stats-details {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.stats-panel {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.75rem;
}

.stats-panel__title {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.stats-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.stats-list__item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.45rem 0.5rem;
  border-radius: 0.45rem;
  background: var(--color-bg);
}

.stats-list__label {
  font-size: 0.8125rem;
}

.stats-list__value {
  font-size: 0.8125rem;
  font-weight: 700;
  white-space: nowrap;
}

.stats-list__empty {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  padding: 0.45rem 0.25rem;
}

.transaction-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.transaction-list__empty {
  padding: 1rem;
  text-align: center;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border-radius: var(--radius);
}

.transaction-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.transaction-item__info {
  flex: 1;
  min-width: 0;
}

.transaction-item__category {
  font-weight: 600;
}

.transaction-item__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.transaction-item__amount {
  font-weight: 600;
  white-space: nowrap;
}

.transaction-item__amount--income {
  color: var(--color-income);
}

.transaction-item__amount--expense {
  color: var(--color-expense);
}

.transaction-item__actions {
  display: flex;
  gap: 0.25rem;
}

.btn--small {
  padding: 0.35rem 0.5rem;
  font-size: 0.75rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--danger {
  color: var(--color-expense);
  border-color: color-mix(in srgb, var(--color-expense) 40%, var(--color-border));
}

.btn--secondary {
  padding: 0.75rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--secondary:hover:not(:disabled) {
  background: var(--color-border);
}

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

.btn--danger-fill:hover:not(:disabled) {
  background: #b91c1c;
}

.txn-sheet,
.txn-dialog {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
}

.txn-sheet[hidden],
.txn-dialog[hidden] {
  display: none;
}

.txn-sheet__backdrop,
.txn-dialog__backdrop {
  position: absolute;
  inset: 0;
  background: rgb(15 23 42 / 0.45);
}

.txn-sheet__panel {
  position: relative;
  width: 100%;
  max-width: 40rem;
  max-height: 92dvh;
  overflow-y: auto;
  padding: 1.25rem 1.25rem 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius) var(--radius) 0 0;
  box-shadow: 0 -8px 32px rgb(15 23 42 / 0.15);
}

.txn-sheet__title,
.txn-dialog__title {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  font-weight: 600;
}

.txn-sheet__form {
  margin: 0;
}

.txn-sheet__actions,
.txn-dialog__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.txn-dialog {
  align-items: center;
  padding: 1.25rem;
}

.txn-dialog__panel {
  position: relative;
  width: 100%;
  max-width: 22rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow), 0 8px 32px rgb(15 23 42 / 0.12);
}

.txn-dialog__text {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

@media (min-width: 36rem) {
  .txn-sheet {
    align-items: center;
    padding: 1.25rem;
  }

  .txn-sheet__panel {
    border-radius: var(--radius);
  }
}

@media (max-width: 480px) {
  .balance__amount {
    font-size: 1.75rem;
  }

  .tab-panel[data-panel="overview"] .balance {
    padding: 0.75rem 0.625rem;
    margin-bottom: 0.5rem;
  }

  .tab-panel[data-panel="overview"] .balance__amount {
    font-size: 1.5rem;
  }

  .tab-panel[data-panel="overview"] .balance__hint {
    margin-top: 0.2rem;
    font-size: 0.6875rem;
  }

  .tab-panel[data-panel="overview"] .overview-card {
    padding: 0.5rem 0.375rem;
  }

  .tab-panel[data-panel="overview"] .overview-card__label {
    font-size: 0.6875rem;
  }

  .tab-panel[data-panel="overview"] .overview-card__value {
    font-size: 0.8125rem;
  }

  .quick-add__row {
    grid-template-columns: 1fr;
  }

  .tab-panel[data-panel="overview"] .quick-add__row {
    grid-template-columns: 1fr 1fr;
    gap: 0.375rem;
  }

  .header-menu {
    width: min(100%, 20rem);
  }

  .transaction-item {
    flex-wrap: wrap;
  }

  .stats-controls,
  .stats-cards,
  .stats-details {
    grid-template-columns: 1fr;
  }

  .tabs__btn {
    padding: 0.5rem 0.375rem;
    font-size: 0.8125rem;
  }

  .header {
    padding-top: max(0.75rem, env(safe-area-inset-top));
    padding-bottom: 0.75rem;
  }

  .tabs {
    padding-top: 0.375rem;
  }

  .main {
    padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
  }
}

@media (max-width: 640px) {
  .stats-controls {
    grid-template-columns: 1fr;
  }
}