/* ============================================================
   猫爷的账本 · 设计系统
   复用 todo-cf 主题：暖白底 / 四象限配色
   ============================================================ */

:root {
  --color-bg: #FAFAF7;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F5F5F0;
  --color-surface-active: #EBEBE5;
  --color-text: #2C2C2C;
  --color-text-secondary: #6E6E73;
  --color-text-tertiary: #A0A0A5;
  --color-border: #E5E5E0;
  --color-border-strong: #D5D5D0;
  --color-overlay: rgba(0, 0, 0, 0.32);

  --color-q1: #C7574F;  /* 支出红 */
  --color-q2: #5A9B6E;  /* 收入绿 */
  --color-q3: #C98841;
  --color-q4: #8E8E93;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-7: 32px; --space-8: 48px;

  --radius-sm: 4px; --radius: 8px; --radius-lg: 12px;

  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", sans-serif;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 100ms cubic-bezier(0.16, 1, 0.3, 1);

  --sidebar-width: 180px;
  --header-height: 64px;
}

[data-theme="dark"] {
  --color-bg: #1C1C1E;
  --color-surface: #2C2C2E;
  --color-surface-hover: #3A3A3C;
  --color-surface-active: #48484A;
  --color-text: #F2F2F7;
  --color-text-secondary: #AEAEB2;
  --color-text-tertiary: #6E6E73;
  --color-border: #3A3A3C;
  --color-border-strong: #48484A;
  --color-overlay: rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
body {
  display: flex;
  overflow: hidden;
}
button { font-family: inherit; cursor: pointer; border: none; background: transparent; color: inherit; padding: 0; }
input, select, textarea { font-family: inherit; color: inherit; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--color-border-strong); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: var(--space-3) var(--space-2);
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3) var(--space-4);
  font-weight: 600;
  font-family: var(--font-heading);
  font-size: 13.5px;
}
.brand-mark {
  width: 18px; height: 18px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--color-q1), var(--color-q2));
}
.sidebar-nav { flex: 1; }
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 13px;
  user-select: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  margin-bottom: 2px;
}
.nav-item:hover { background: var(--color-surface-hover); color: var(--color-text); }
.nav-item.active { background: var(--color-surface-active); color: var(--color-text); font-weight: 500; }
.nav-icon { font-size: 14px; width: 18px; text-align: center; }
.nav-label { flex: 1; }
.sidebar-foot {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-2);
  border-top: 1px solid var(--color-border);
}
.foot-btn {
  flex: 1;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--color-text-secondary);
  transition: background var(--transition-fast);
}
.foot-btn:hover { background: var(--color-surface-hover); color: var(--color-text); }

/* ============================================================
   Main
   ============================================================ */
.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.main-header {
  height: var(--header-height);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.main-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
}
.main-subtitle {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}
.main-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-6);
}

/* ============================================================
   通用组件
   ============================================================ */
.btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  border: 1px solid transparent;
  transition: background var(--transition-fast);
}
.btn-primary { background: var(--color-q2); color: white; }
.btn-primary:hover { background: #4d8a5d; }
.btn-ghost { background: var(--color-bg); color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { background: var(--color-surface-hover); }
.btn-danger { background: var(--color-q1); color: white; }
.btn-danger:hover { background: #b34a44; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.kpi-label {
  font-size: 11.5px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.kpi-value {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.5px;
}
.kpi-value.income { color: var(--color-q2); }
.kpi-value.expense { color: var(--color-q1); }
.kpi-value.balance.positive { color: var(--color-q2); }
.kpi-value.balance.negative { color: var(--color-q1); }
.kpi-sub {
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-3);
  letter-spacing: 0.3px;
}

.dash-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 960px) {
  .dash-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   流水表格
   ============================================================ */
.tx-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.tx-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-tertiary);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  padding: 10px 12px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.tx-table td {
  padding: 10px 12px;
  font-size: 13px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.tx-table tr:last-child td { border-bottom: none; }
.tx-table tr:hover td { background: var(--color-surface-hover); }
.tx-amount-income { color: var(--color-q2); font-weight: 500; }
.tx-amount-expense { color: var(--color-q1); font-weight: 500; }
.tx-cat {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px;
  color: var(--color-text-secondary);
}
.tx-cat-dot {
  width: 8px; height: 8px; border-radius: 50%;
  flex-shrink: 0;
}
.tx-del-btn {
  width: 22px; height: 22px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px;
  color: var(--color-text-tertiary);
  opacity: 0;
  transition: opacity var(--transition-fast), background var(--transition-fast);
}
.tx-table tr:hover .tx-del-btn { opacity: 1; }
.tx-del-btn:hover { background: var(--color-q1-bg); color: var(--color-q1); }

/* 流水筛选 */
.tx-filters {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.tx-filters select, .tx-filters input {
  padding: 6px 10px;
  font-size: 12.5px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
}
.tx-filters select:focus, .tx-filters input:focus { border-color: var(--color-q2); }
.tx-filters .filter-spacer { flex: 1; }
.tx-filters .filter-clear {
  padding: 6px 12px;
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* ============================================================
   分类 / 账户 / 预算 列表
   ============================================================ */
.list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
}
.list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: background var(--transition-fast);
}
.list-item:hover { background: var(--color-surface-hover); }
.list-item-icon {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 18px;
  border-radius: 50%;
  flex-shrink: 0;
}
.list-item-name { flex: 1; font-size: 13.5px; font-weight: 500; }
.list-item-meta { font-size: 11.5px; color: var(--color-text-tertiary); }
.list-item-actions { display: flex; gap: 4px; }
.list-action-btn {
  width: 26px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-text-tertiary);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.list-action-btn:hover { background: var(--color-surface-active); color: var(--color-text); }
.list-action-btn.danger:hover { background: var(--color-q1-bg); color: var(--color-q1); }

.list-section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-3);
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.list-add-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: transparent;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius);
  color: var(--color-text-tertiary);
  font-size: 12.5px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  width: 100%;
  min-height: 56px;
}
.list-add-btn:hover { background: var(--color-surface-hover); color: var(--color-text); }

/* 预算进度条 */
.budget-bar-bg {
  height: 8px;
  background: var(--color-surface-active);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
}
.budget-bar {
  height: 100%;
  background: var(--color-q2);
  transition: width var(--transition);
}
.budget-bar.warn { background: var(--color-q3); }
.budget-bar.over { background: var(--color-q1); }
.budget-amount {
  font-size: 11.5px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
  display: flex;
  justify-content: space-between;
}

/* ============================================================
   分类饼图
   ============================================================ */
.pie-wrap {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
}
.pie-svg { width: 160px; height: 160px; flex-shrink: 0; }
.pie-legend { flex: 1; min-width: 180px; }
.pie-legend-row {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 0;
  font-size: 12.5px;
}
.pie-legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.pie-legend-name { flex: 1; }
.pie-legend-amount { color: var(--color-text-secondary); font-variant-numeric: tabular-nums; }

/* 趋势柱 */
.trend-bars {
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
  height: 120px;
  padding: var(--space-2) 0;
}
.trend-bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.trend-bar-fill {
  width: 100%;
  background: var(--color-q2);
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  transition: height var(--transition);
}
.trend-bar-fill.expense { background: var(--color-q1); }
.trend-bar-label { font-size: 10.5px; color: var(--color-text-tertiary); }

/* ============================================================
   Modal
   ============================================================ */
.modal-backdrop {
  position: fixed; inset: 0;
  background: var(--color-overlay);
  z-index: 100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  backdrop-filter: blur(4px);
  animation: fadeIn 160ms ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 480px;
  padding: var(--space-5);
  animation: slideDown 200ms cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes slideDown {
  from { transform: translateY(-12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.tx-title, .prompt-title {
  margin: 0 0 var(--space-4);
  font-size: 15px;
  font-weight: 600;
}
.tx-type-row {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.tx-type-btn {
  flex: 1;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.tx-type-btn.active.expense { background: var(--color-q1); color: white; border-color: var(--color-q1); }
.tx-type-btn.active.income { background: var(--color-q2); color: white; border-color: var(--color-q2); }

.tx-form { display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-4); }
.tx-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.tx-row label {
  width: 60px;
  font-size: 12.5px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.tx-row input, .tx-row select {
  flex: 1;
  padding: 7px 10px;
  font-size: 13px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
  font-family: inherit;
}
.tx-row input:focus, .tx-row select:focus { border-color: var(--color-q2); }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}
.modal-actions .btn-danger { margin-right: auto; }

.prompt-input {
  width: 100%;
  padding: 8px 12px;
  font-size: 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  outline: none;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.prompt-input:focus { border-color: var(--color-q2); }

/* 编辑模态 */
.edit-field {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.edit-field label {
  width: 60px;
  font-size: 12.5px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.edit-field input, .edit-field select {
  flex: 1;
  padding: 6px 10px;
  font-size: 13px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
}

/* ============================================================
   Empty state
   ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-tertiary);
  text-align: center;
}
.empty-state-icon { font-size: 48px; opacity: 0.4; margin-bottom: var(--space-3); }
.empty-state-text { font-size: 13px; }

/* ============================================================
   Toast
   ============================================================ */
.toast-container {
  position: fixed;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  pointer-events: none;
}
.toast {
  background: var(--color-text);
  color: var(--color-bg);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 12.5px;
  box-shadow: var(--shadow-lg);
  animation: toastIn 200ms ease;
  pointer-events: auto;
}
@keyframes toastIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}