:root {
  --bg: #f1f5f9;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --income: #059669;
  --income-bg: #d1fae5;
  --expense: #dc2626;
  --expense-bg: #fee2e2;
  --balance: #0ea5e9;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.06);
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    system-ui, sans-serif;
  line-height: 1.5;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

.app-header h1 {
  margin: 0;
  font-size: 1.75rem;
}

.subtitle {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

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

.summary-card {
  background: var(--panel);
  padding: 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border-left: 4px solid var(--border);
}

.summary-card.income {
  border-left-color: var(--income);
}

.summary-card.expense {
  border-left-color: var(--expense);
}

.summary-card.balance {
  border-left-color: var(--balance);
}

.summary-card .label {
  color: var(--muted);
  font-size: 0.875rem;
}

.summary-card .value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.summary-card.income .value {
  color: var(--income);
}

.summary-card.expense .value {
  color: var(--expense);
}

#summary-balance.negative {
  color: var(--expense);
}

#summary-balance.positive {
  color: var(--balance);
}

.content-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 1rem;
}

.panel {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.form-panel form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.type-toggle {
  border: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  background: var(--bg);
  border-radius: 10px;
  padding: 4px;
}

.radio-tab {
  position: relative;
  text-align: center;
  cursor: pointer;
}

.radio-tab input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}

.radio-tab span {
  display: block;
  padding: 0.5rem 0;
  border-radius: 8px;
  font-weight: 600;
  color: var(--muted);
  transition: all 0.15s ease;
}

.radio-tab input:checked + span {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.radio-tab:first-child input:checked + span {
  color: var(--expense);
}

.radio-tab:last-child input:checked + span {
  color: var(--income);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
}

.field > span {
  color: var(--muted);
  font-weight: 500;
}

.field input,
.field select,
.inline-field select {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: #fff;
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus,
.field select:focus,
.inline-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font: inherit;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  flex: 1;
}

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

.btn-ghost {
  background: transparent;
}

.file-btn {
  cursor: pointer;
  position: relative;
}

.charts-panel {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 1rem;
}

.chart-wrap {
  position: relative;
  min-height: 220px;
}

.list-panel {
  overflow: hidden;
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.list-header h2 {
  margin: 0;
}

.toolbar {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.inline-field {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.inline-field select {
  padding: 0.4rem 0.6rem;
  font-size: 0.9rem;
}

.table-wrap {
  overflow-x: auto;
}

.record-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.record-table th,
.record-table td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.record-table th {
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
  position: sticky;
  top: 0;
}

.record-table .align-right {
  text-align: right;
}

.record-table .amount {
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.record-table .note,
.record-table .merchant {
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.record-table .note {
  color: var(--muted);
}

.record-table .merchant {
  max-width: 160px;
}

.record-table tr:hover td {
  background: #f8fafc;
}

.empty-row td {
  text-align: center;
  color: var(--muted);
  padding: 2rem 1rem;
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.tag.type-income {
  background: var(--income-bg);
  color: var(--income);
}

.tag.type-expense {
  background: var(--expense-bg);
  color: var(--expense);
}

.amount.type-income {
  color: var(--income);
}

.amount.type-expense {
  color: var(--expense);
}

.actions {
  display: flex;
  gap: 0.35rem;
}

.btn-edit,
.btn-delete {
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: 0.8rem;
}

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

.btn-delete {
  color: var(--expense);
  border-color: #fecaca;
}

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

.app-footer {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  color: var(--muted);
}

#toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  padding: 0.65rem 1rem;
  border-radius: 8px;
  background: var(--text);
  color: #fff;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  opacity: 1;
  transition: opacity 0.3s ease;
  pointer-events: auto;
  max-width: 320px;
}

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

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

.toast-fade {
  opacity: 0;
}

@media (max-width: 768px) {
  .summary {
    grid-template-columns: 1fr;
  }

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

  .list-header {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar {
    justify-content: space-between;
  }

  .record-table th,
  .record-table td {
    padding: 0.5rem;
    font-size: 0.85rem;
  }

  .record-table .note,
  .record-table .merchant {
    max-width: 100px;
  }
}