:root {
      --bg: #0b1020;
      --panel: #121832;
      --muted: #8a94bf;
      --text: #e6e9f5;
      --primary: #6ea8fe;
      --primary-ghost: rgba(110,168,254,.15);
      --danger: #ff6b6b;
      --success: #4ade80;
      --warn: #ffcc66;
      --border: 1px solid rgba(255,255,255,.08);
      --input-bg: #0c1330;
      --input-bd: rgba(255,255,255,.12);
      --input-bd-focus: rgba(110,168,254,.65);
      --ring: rgba(110,168,254,.35);
      --shadow: 0 10px 30px rgba(0,0,0,.35);
      --surface: rgba(255,255,255,.05);
      --border-color: rgba(255,255,255,.08);
    }

    .light-theme {
      --bg: #f5f7fa;
      --panel: #ffffff;
      --muted: #6b7280;
      --text: #1f2937;
      --primary: #3b82f6;
      --primary-ghost: rgba(59,130,246,.1);
      --danger: #ef4444;
      --success: #22c55e;
      --warn: #f59e0b;
      --border: 1px solid rgba(0,0,0,.08);
      --input-bg: #f9fafb;
      --input-bd: rgba(0,0,0,.12);
      --input-bd-focus: rgba(59,130,246,.5);
      --ring: rgba(59,130,246,.25);
      --shadow: 0 10px 30px rgba(0,0,0,.1);
      --surface: rgba(0,0,0,.03);
      --border-color: rgba(0,0,0,.08);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html, body { height: 100%; }
    body {
      font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.5;
      transition: background .3s, color .3s;
    }
    body:not(.light-theme) {
      background: #0b1020;
    }

    .appbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(15,23,35,.85);
      backdrop-filter: saturate(180%) blur(12px);
      border-bottom: 1px solid rgba(255,255,255,.08);
    }
    .light-theme .appbar {
      background: rgba(255,255,255,.9);
      border-bottom: 1px solid rgba(0,0,0,.08);
    }
    .appbar .wrap {
      max-width: 900px;
      margin: 0 auto;
      padding: 14px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .brand { font-size: 20px; font-weight: 700; white-space: nowrap; }
    .appbar-right {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .month-select select {
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 8px;
      padding: 8px 12px;
      color: var(--text);
      font-size: 14px;
    }
    .theme-toggle {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      border: var(--border);
      background: transparent;
      color: var(--text);
      cursor: pointer;
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .theme-toggle:hover { background: rgba(255,255,255,.05); }
    .light-theme .theme-toggle:hover { background: rgba(0,0,0,.05); }

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

    .card {
      background: var(--panel);
      border: var(--border);
      border-radius: 14px;
      padding: 20px;
      margin-bottom: 16px;
    }
    .card h2 {
      font-size: 16px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .card-header h2 { margin-bottom: 0; }
    .section-total {
      font-size: 14px;
      font-weight: 600;
      color: var(--danger);
      margin-left: 8px;
    }

    /* Quick Add FAB */
    .fab {
      position: fixed;
      bottom: 24px;
      right: 24px;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: var(--primary);
      color: #0b1020;
      border: none;
      font-size: 24px;
      cursor: pointer;
      box-shadow: 0 4px 20px rgba(110,168,254,.4);
      z-index: 30;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform .2s;
    }
    .fab:hover { transform: scale(1.1); }
    .fab:active { transform: scale(0.95); }

    /* Summary Grid */
    .summary-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      margin-bottom: 12px;
    }
    .summary-grid.three-col {
      grid-template-columns: repeat(3, 1fr);
    }
    .summary-grid.two-col {
      grid-template-columns: repeat(2, 1fr);
    }
    .summary-section {
      margin-bottom: 8px;
    }
    .summary-grid.four-col {
      grid-template-columns: repeat(4, 1fr);
    }
    .summary-card {
      background: rgba(255,255,255,.03);
      border: 1px solid rgba(255,255,255,.08);
      border-radius: 12px;
      padding: 16px;
      text-align: center;
    }
    .light-theme .summary-card {
      background: rgba(0,0,0,.02);
      border-color: rgba(0,0,0,.06);
    }
    .summary-card .value {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
    }
    .summary-card .label {
      font-size: 12px;
      color: var(--muted);
      margin-top: 4px;
    }
    .summary-card.danger .value { color: var(--danger); }
    .summary-card.success .value { color: var(--success); }
    .summary-card.warn .value { color: var(--warn); }

    .card-subtitle {
      font-size: 11px;
      color: var(--muted);
      margin-top: 2px;
      opacity: 0.85;
      min-height: 14px;
    }
    .balance-breakdown {
      margin-top: 6px;
      padding-top: 6px;
      border-top: 1px solid rgba(255,255,255,.08);
      font-size: 11px;
      color: var(--muted);
      text-align: left;
      line-height: 1.6;
    }
    .light-theme .balance-breakdown { border-top-color: rgba(0,0,0,.08); }
    .balance-breakdown .bb-row {
      display: flex;
      justify-content: space-between;
      gap: 8px;
    }
    .balance-breakdown .bb-row .bb-amount { color: var(--danger); white-space: nowrap; }
    #budgetCard { cursor: pointer; }

    /* Budget Progress Bar */

    .budget-progress-wrap {
      margin-bottom: 20px;
    }
    .budget-progress-bar {
      height: 8px;
      background: rgba(255,255,255,.06);
      border-radius: 4px;
      overflow: hidden;
    }
    .light-theme .budget-progress-bar {
      background: rgba(0,0,0,.06);
    }
    .budget-progress-fill {
      height: 100%;
      border-radius: 4px;
      transition: width 0.4s ease, background 0.3s ease;
      background: var(--success);
    }
    .budget-progress-fill.warn { background: var(--warn); }
    .budget-progress-fill.danger { background: var(--danger); }
    .budget-progress-labels {
      display: flex;
      justify-content: space-between;
      font-size: 11px;
      color: var(--muted);
      margin-top: 4px;
    }
    .pace-label.over { color: var(--danger); }
    .pace-label.under { color: var(--success); }

    /* Balance Flow Bar */
    .balance-flow-wrap {
      margin: 8px 0 12px;
    }
    .balance-flow-bar {
      display: flex;
      height: 10px;
      background: rgba(255,255,255,.06);
      border-radius: 5px;
      overflow: hidden;
    }
    .light-theme .balance-flow-bar {
      background: rgba(0,0,0,.06);
    }
    .flow-filled {
      background: var(--primary);
      position: relative;
      transition: width 0.4s ease;
      min-width: 0;
    }
    .flow-projected {
      background: rgba(110,168,254,.25);
      position: relative;
      transition: width 0.4s ease;
      flex: 1;
    }
    .flow-projected.danger { background: rgba(248,81,73,.25); }
    .flow-marker {
      position: absolute;
      right: 0;
      top: -4px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .flow-marker-label {
      font-size: 9px;
      color: var(--muted);
      white-space: nowrap;
      margin-top: 16px;
    }
    .flow-labels {
      display: flex;
      justify-content: space-between;
      font-size: 11px;
      color: var(--muted);
      margin-top: 18px;
    }

    /* Time Marker on Budget Progress Bar */
    .time-marker {
      position: absolute;
      top: -3px;
      width: 2px;
      height: 14px;
      background: rgba(255,255,255,.5);
      border-radius: 1px;
      transition: left 0.4s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .time-marker-label {
      font-size: 9px;
      color: rgba(255,255,255,.5);
      white-space: nowrap;
      margin-top: 16px;
    }
    .light-theme .time-marker { background: rgba(0,0,0,.4); }
    .light-theme .time-marker-label { color: rgba(0,0,0,.4); }

    /* Monthly Mini History */
    .monthly-mini-history {
      background: rgba(255,255,255,.02);
      border: 1px solid rgba(255,255,255,.06);
      border-radius: 10px;
      padding: 10px 14px 12px;
      margin-bottom: 12px;
    }
    .light-theme .monthly-mini-history {
      background: rgba(0,0,0,.02);
      border-color: rgba(0,0,0,.05);
    }
    .mini-history-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
    }
    .mini-history-title {
      font-size: 11px;
      font-weight: 600;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .mini-history-link {
      font-size: 11px;
      color: var(--primary);
      cursor: pointer;
    }
    .mini-history-bars {
      display: flex;
      gap: 4px;
      align-items: flex-end;
      height: 40px;
    }
    .mini-bar-col {
      display: flex;
      flex-direction: column;
      align-items: center;
      flex: 1;
      gap: 2px;
    }
    .mini-bar {
      width: 100%;
      border-radius: 2px 2px 0 0;
      background: rgba(110,168,254,.4);
      transition: height 0.3s ease;
      min-height: 2px;
    }
    .mini-bar.current { background: var(--primary); }
    .mini-bar-label {
      font-size: 9px;
      color: var(--muted);
      white-space: nowrap;
    }

    /* Stats Divider */
    .stats-divider {
      height: 1px;
      background: rgba(255,255,255,.08);
      margin: 24px 0;
    }
    .light-theme .stats-divider {
      background: rgba(0,0,0,.08);
    }

    /* Daily Budget Banner */
    .daily-budget-banner {
      background: linear-gradient(135deg, rgba(110,168,254,.15) 0%, rgba(74,222,128,.1) 100%);
      border: 1px solid rgba(110,168,254,.3);
      border-radius: 12px;
      padding: 16px 20px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .daily-budget-left { display: flex; align-items: center; gap: 12px; }
    .daily-budget-icon { font-size: 32px; }
    .daily-budget-text .title { font-size: 13px; color: var(--muted); }
    .daily-budget-text .amount { font-size: 24px; font-weight: 700; color: var(--primary); }
    .daily-budget-right { text-align: right; font-size: 12px; color: var(--muted); }

    /* Savings Goal */
    .savings-goal {
      background: rgba(74,222,128,.1);
      border: 1px solid rgba(74,222,128,.2);
      border-radius: 12px;
      padding: 16px;
      margin-bottom: 16px;
    }
    .savings-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }
    .savings-header h3 { font-size: 14px; color: var(--success); display: flex; align-items: center; gap: 6px; }
    .savings-progress {
      background: rgba(255,255,255,.1);
      border-radius: 8px;
      height: 12px;
      overflow: hidden;
      margin-bottom: 8px;
    }
    .savings-progress-bar {
      height: 100%;
      background: linear-gradient(90deg, var(--success), #22d3ee);
      border-radius: 8px;
      transition: width .5s ease;
    }
    .savings-stats {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: var(--muted);
    }

    .budget-warning {
      background: rgba(255,107,107,.15);
      border: 1px solid var(--danger);
      border-radius: 10px;
      padding: 12px 16px;
      margin-bottom: 16px;
      color: var(--danger);
      font-weight: 600;
      display: none;
    }
    .budget-warning.show { display: flex; align-items: center; gap: 8px; }

    /* Month Comparison */
    .comparison-banner {
      background: rgba(139,92,246,.1);
      border: 1px solid rgba(139,92,246,.2);
      border-radius: 10px;
      padding: 12px 16px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 13px;
    }
    .comparison-banner .icon { font-size: 20px; }
    .comparison-up { color: var(--danger); }
    .comparison-down { color: var(--success); }

    .budget-row {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      background: rgba(255,255,255,.03);
      border-radius: 10px;
      margin-bottom: 16px;
    }
    .light-theme .budget-row { background: rgba(0,0,0,.02); }
    .budget-row label {
      font-size: 14px;
      color: var(--muted);
      white-space: nowrap;
    }
    .budget-row input {
      flex: 1;
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 8px;
      padding: 10px 12px;
      color: var(--text);
      font-size: 16px;
      text-align: right;
      outline: none;
    }
    .budget-row input:focus {
      border-color: var(--input-bd-focus);
      box-shadow: 0 0 0 3px var(--ring);
    }
    .budget-row select {
      flex: 1;
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 8px;
      padding: 10px 12px;
      color: var(--text);
      font-size: 14px;
      outline: none;
    }
    .budget-row select:focus {
      border-color: var(--input-bd-focus);
      box-shadow: 0 0 0 3px var(--ring);
    }

    .btn {
      border: var(--border);
      color: var(--text);
      background: transparent;
      padding: 10px 16px;
      border-radius: 10px;
      cursor: pointer;
      font-size: 14px;
      transition: all .2s;
      white-space: nowrap;
    }
    .btn:hover { background: rgba(255,255,255,.05); }
    .light-theme .btn:hover { background: rgba(0,0,0,.05); }
    .btn.primary {
      background: var(--primary);
      border-color: transparent;
      color: #0b1020;
      font-weight: 600;
    }
    .btn.primary:hover { filter: brightness(1.05); }
    .btn.danger { color: var(--danger); }
    .btn.sm { padding: 6px 10px; font-size: 12px; }
    .btn-group { display: flex; gap: 6px; }

    /* Tabs */
    .tabs {
      display: flex;
      gap: 4px;
      margin-bottom: 16px;
      border-bottom: 1px solid rgba(255,255,255,.1);
      padding-bottom: 8px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }
    .tabs::-webkit-scrollbar { display: none; }
    .light-theme .tabs { border-color: rgba(0,0,0,.1); }
    .tab {
      padding: 8px 16px;
      border-radius: 8px;
      background: transparent;
      border: none;
      color: var(--muted);
      cursor: pointer;
      font-size: 14px;
      transition: all .2s;
      white-space: nowrap;
    }
    .tab:hover { background: rgba(255,255,255,.05); }
    .light-theme .tab:hover { background: rgba(0,0,0,.05); }
    .tab.active {
      background: var(--primary-ghost);
      color: var(--primary);
      font-weight: 600;
    }

    /* Chart */
    .chart-container {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .chart-wrap {
      width: 180px;
      height: 180px;
      flex-shrink: 0;
    }
    .chart-legend { flex: 1; }
    .legend-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 0;
      font-size: 13px;
    }
    .legend-color {
      width: 12px;
      height: 12px;
      border-radius: 3px;
    }
    .legend-label { flex: 1; }
    .legend-value { font-weight: 600; color: var(--text); }
    .legend-budget { font-size: 11px; color: var(--muted); margin-left: 8px; }

    /* Category Detail Panel */
    .category-detail-panel {
      margin-top: 16px;
      border: 1px solid rgba(255,255,255,.15);
      border-radius: 12px;
      overflow: hidden;
      animation: catDetailIn 0.18s ease;
      background: rgba(255,255,255,.03);
      box-shadow: 0 2px 12px rgba(0,0,0,.2);
      position: relative;
    }
    .category-detail-panel::before {
      content: '';
      display: block;
      height: 3px;
      background: var(--panel-accent-color, var(--primary));
    }
    .light-theme .category-detail-panel {
      border-color: rgba(0,0,0,.12);
      background: rgba(0,0,0,.02);
      box-shadow: 0 2px 12px rgba(0,0,0,.06);
    }
    @keyframes catDetailIn {
      from { opacity: 0; transform: translateY(-6px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .category-detail-header {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 14px;
      font-weight: 600;
      font-size: 14px;
    }
    .category-detail-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      flex-shrink: 0;
    }
    .category-detail-close {
      margin-left: auto;
      background: none;
      border: none;
      color: var(--muted);
      cursor: pointer;
      font-size: 20px;
      line-height: 1;
      padding: 0 2px;
    }
    .category-detail-close:hover { color: var(--text); }
    .category-detail-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 7px 14px;
      border-top: 1px solid var(--border-color);
      font-size: 13px;
    }
    .category-detail-item:hover { background: var(--surface); }
    .category-detail-name {
      flex: 1;
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .category-detail-type {
      font-size: 10px;
      padding: 2px 6px;
      border-radius: 4px;
      color: var(--muted);
      background: var(--surface);
      flex-shrink: 0;
    }
    .category-detail-amount {
      font-weight: 600;
      color: var(--danger);
      flex-shrink: 0;
    }
    .category-detail-total {
      display: flex;
      justify-content: space-between;
      padding: 9px 14px;
      border-top: 1px solid var(--border-color);
      font-weight: 700;
      font-size: 13px;
      background: var(--surface);
    }

    /* Trend Chart */
    .trend-chart-wrap {
      height: 200px;
      margin-bottom: 16px;
    }

    /* Yearly Heatmap */
    /* Stats KPI Cards */
    .stats-kpi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 8px;
      padding-bottom: 20px;
      margin-bottom: 16px;
      border-bottom: 2px solid rgba(255,255,255,0.08);
    }
    .stats-kpi-card {
      border-radius: 10px;
      padding: 12px 10px;
      border: var(--border);
      border-top: 3px solid transparent;
    }
    .kpi-card--spend {
      border-top-color: #60a5fa;
      background: linear-gradient(to bottom, rgba(96,165,250,0.15) 0%, var(--panel) 75%);
    }
    .kpi-card--avg {
      border-top-color: #f59e0b;
      background: linear-gradient(to bottom, rgba(245,158,11,0.15) 0%, var(--panel) 75%);
    }
    .kpi-card--save {
      border-top-color: #4ade80;
      background: linear-gradient(to bottom, rgba(74,222,128,0.15) 0%, var(--panel) 75%);
    }
    .kpi-card--over {
      border-top-color: #ff6b6b;
      background: linear-gradient(to bottom, rgba(255,107,107,0.15) 0%, var(--panel) 75%);
    }
    .kpi-icon {
      margin-bottom: 4px;
    }
    .kpi-icon svg { width: 14px; height: 14px; stroke-width: 2; opacity: 0.8; }
    .kpi-value {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.2;
    }
    .kpi-label {
      font-size: 10px;
      color: var(--muted);
      margin: 3px 0 2px;
      text-transform: uppercase;
      letter-spacing: 0.3px;
    }
    .kpi-sub {
      font-size: 10px;
      color: var(--muted);
    }
    .kpi-bar {
      height: 3px;
      background: var(--border-color);
      border-radius: 2px;
      margin-top: 6px;
      overflow: hidden;
    }
    .kpi-bar-fill {
      height: 100%;
      border-radius: 2px;
      transition: width 0.5s ease;
    }
    .trend-period-btn {
      font-size: 11px;
      padding: 3px 10px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      background: transparent;
      color: var(--muted);
      cursor: pointer;
      transition: all 0.15s;
    }
    .trend-period-btn.active {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }
    @media (max-width: 480px) {
      .stats-kpi-grid { grid-template-columns: repeat(3, 1fr); gap: 6px; }
      .kpi-value { font-size: 15px; }
    }

    .heatmap-container { margin-top: 16px; }
    .heatmap-months {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 4px;
    }
    .heatmap-month {
      aspect-ratio: 1;
      border-radius: 6px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 10px;
      cursor: pointer;
      transition: transform .2s;
    }
    .heatmap-month:hover { transform: scale(1.1); }
    .heatmap-month .month-label { font-weight: 600; }
    .heatmap-month .month-amount { font-size: 9px; opacity: 0.8; }
    .heatmap-legend {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 8px;
      margin-top: 12px;
      font-size: 11px;
      color: var(--muted);
    }
    .heatmap-scale {
      display: flex;
      gap: 2px;
    }
    .heatmap-scale-item {
      width: 16px;
      height: 16px;
      border-radius: 3px;
    }

    /* Calendar */
    .calendar-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }
    .calendar-header h3 { font-size: 16px; font-weight: 600; }
    .calendar-nav { display: flex; gap: 8px; }
    .calendar-nav button {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      border: var(--border);
      background: transparent;
      color: var(--text);
      cursor: pointer;
      font-size: 14px;
    }
    .calendar-nav button:hover { background: rgba(255,255,255,.05); }
    .light-theme .calendar-nav button:hover { background: rgba(0,0,0,.05); }

    .calendar-grid {
      display: grid;
      grid-template-columns: repeat(7, 1fr);
      gap: 4px;
    }
    .calendar-day-header {
      text-align: center;
      font-size: 11px;
      color: var(--muted);
      padding: 8px 0;
      font-weight: 600;
    }
    .calendar-day-header.weekend { color: var(--danger); opacity: 0.6; }
    .calendar-day {
      aspect-ratio: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      border-radius: 8px;
      background: rgba(255,255,255,.02);
      color: var(--text);
      cursor: pointer;
      transition: all .2s;
    }
    .calendar-day:hover { background: rgba(255,255,255,.08); }
    .calendar-day.empty { background: transparent; pointer-events: none; }
    .calendar-day.weekend { color: var(--danger); opacity: 0.7; }
    .calendar-day.today {
      background: var(--primary);
      color: #0b1020;
      font-weight: 700;
    }
    .calendar-day.workday {
      background: rgba(74,222,128,.15);
      border: 1px solid rgba(74,222,128,.3);
    }
    .calendar-day.holiday { background: rgba(255,107,107,.1); }
    .calendar-day.has-payment {
      position: relative;
    }
    .calendar-day.has-payment::after {
      content: '';
      position: absolute;
      bottom: 4px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--warn);
    }

    /* Calendar Tooltip */
    .calendar-day {
      position: relative;
    }
    .calendar-day[data-tooltip]:hover::before {
      content: attr(data-tooltip);
      position: absolute;
      top: auto;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      height: auto;
      background: rgba(0,0,0,.9);
      color: #fff;
      padding: 6px 10px;
      border-radius: 6px;
      font-size: 11px;
      white-space: pre-line;
      z-index: 100;
      min-width: 120px;
      text-align: left;
      pointer-events: none;
      margin-bottom: 4px;
      box-shadow: 0 4px 12px rgba(0,0,0,.3);
    }
    .calendar-day[data-tooltip]:hover::after {
      content: '';
      position: absolute;
      top: auto;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 0;
      background: transparent;
      border: 6px solid transparent;
      border-top-color: rgba(0,0,0,.9);
      border-radius: 0;
      margin-bottom: -8px;
      z-index: 101;
    }

    /* === Generic Tooltip System === */
    /* Any element with data-tooltip shows styled tooltip on hover */
    [data-tooltip] {
      position: relative;
      cursor: help;
    }

    [data-tooltip]:hover::before {
      content: attr(data-tooltip);
      position: absolute;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%);
      background: rgba(0,0,0,.92);
      color: #fff;
      padding: 8px 12px;
      border-radius: 8px;
      font-size: 12px;
      white-space: pre-line;
      z-index: 100;
      min-width: 160px;
      max-width: 280px;
      text-align: left;
      pointer-events: none;
      margin-bottom: 6px;
      box-shadow: 0 4px 16px rgba(0,0,0,.4);
      line-height: 1.5;
    }

    [data-tooltip]:hover::after {
      content: '';
      position: absolute;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%);
      border: 6px solid transparent;
      border-top-color: rgba(0,0,0,.92);
      margin-bottom: -6px;
      z-index: 101;
      pointer-events: none;
    }

    /* Calendar-day specific positioning (keep existing behavior) */
    .calendar-day[data-tooltip]:hover::before {
      /* Already defined at L566-584 - no changes needed */
    }
    .calendar-day[data-tooltip]:hover::after {
      /* Already defined at L586-600 - no changes needed */
    }

    .workday-info {
      display: flex;
      justify-content: space-around;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px dashed rgba(255,255,255,.1);
    }
    .workday-stat { text-align: center; }
    .workday-stat .num {
      font-size: 28px;
      font-weight: 700;
      color: var(--primary);
    }
    .workday-stat .desc {
      font-size: 12px;
      color: var(--muted);
    }

    /* Expense Table */
    .expense-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 16px;
      background: rgba(255,255,255,.03);
      border: 1px solid rgba(255,255,255,.06);
      border-radius: 10px;
      margin-bottom: 8px;
      transition: all .2s;
    }
    .light-theme .expense-item {
      background: rgba(0,0,0,.02);
      border-color: rgba(0,0,0,.06);
    }
    .expense-item:hover { border-color: rgba(255,255,255,.12); }
    .light-theme .expense-item:hover { border-color: rgba(0,0,0,.12); }
    .expense-item.sortable-ghost { opacity: 0.4; }
    .expense-item.sortable-drag { background: var(--panel); }

    .drag-handle {
      cursor: grab;
      color: var(--muted);
      display: flex;
      align-items: center;
      padding: 0 4px;
    }
    .drag-handle:active { cursor: grabbing; }

    .expense-main { flex: 1; min-width: 0; }
    .expense-header {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 4px;
      flex-wrap: wrap;
    }
    .expense-name { font-weight: 600; }
    .expense-type {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 11px;
      font-weight: 600;
    }
    .expense-type.fixed {
      background: rgba(110,168,254,.15);
      color: var(--primary);
    }
    .expense-type.workday {
      background: rgba(74,222,128,.15);
      color: var(--success);
    }
    .expense-type.skipped {
      background: rgba(148,163,184,.15);
      color: var(--muted);
    }
    .expense-type.yearly { background: rgba(124,58,237,.15); color: #7c3aed; }
    .category-badge {
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 11px;
      font-weight: 600;
    }
    .payment-badge {
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 10px;
      background: rgba(139,92,246,.15);
      color: #a78bfa;
    }
    .tag-badge {
      padding: 2px 6px;
      border-radius: 4px;
      font-size: 10px;
      background: rgba(255,255,255,.1);
      color: var(--muted);
    }
    .expense-calc {
      font-size: 12px;
      color: var(--muted);
    }
    .expense-memo {
      font-size: 12px;
      color: var(--muted);
      margin-top: 4px;
      font-style: italic;
    }
    .expense-payment-date {
      font-size: 11px;
      color: var(--warn);
      margin-top: 4px;
    }

    .expense-amounts {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 4px;
      min-width: 100px;
    }
    .expense-planned {
      font-size: 15px;
      font-weight: 600;
      color: var(--danger);
    }
    .expense-savings {
      font-size: 13px;
      font-weight: 600;
      color: var(--danger);
    }
    .expense-actual-wrap {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .expense-actual-wrap label {
      font-size: 11px;
      color: var(--muted);
    }
    .expense-actual {
      width: 80px;
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 6px;
      padding: 4px 8px;
      color: var(--text);
      font-size: 13px;
      text-align: right;
    }
    .expense-actual.over { border-color: var(--danger); color: var(--danger); }
    .expense-actual.under { border-color: var(--success); color: var(--success); }

    .expense-actions {
      display: flex;
      flex-direction: row;
      gap: 6px;
      align-items: center;
    }

    /* Add Form */
    .add-form {
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px dashed rgba(255,255,255,.1);
    }
    .form-row {
      display: flex;
      gap: 8px;
      margin-bottom: 12px;
      align-items: center;
    }
    .form-row input, .form-row select, .form-row textarea {
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 8px;
      padding: 12px;
      color: var(--text);
      font-size: 14px;
      font-family: inherit;
      outline: none;
    }
    .form-row input:focus, .form-row select:focus, .form-row textarea:focus {
      border-color: var(--input-bd-focus);
    }
    .form-row input[type="text"] { flex: 1; }
    .form-row input[type="number"] { width: 120px; text-align: right; }
    .form-row select { min-width: 100px; }
    .form-row textarea { flex: 1; min-height: 60px; resize: vertical; }

    .type-toggle {
      display: flex;
      gap: 8px;
    }
    .type-btn {
      padding: 8px 16px;
      border-radius: 8px;
      border: 1px solid var(--input-bd);
      background: transparent;
      color: var(--muted);
      cursor: pointer;
      font-size: 13px;
      transition: all .2s;
    }
    .type-btn:hover { background: rgba(255,255,255,.05); }
    .type-btn.active {
      background: var(--primary-ghost);
      border-color: var(--primary);
      color: var(--primary);
      font-weight: 600;
    }

    .empty {
      text-align: center;
      padding: 32px;
      color: var(--muted);
    }

    .toast-wrap {
      position: fixed;
      left: 50%;
      transform: translateX(-50%);
      bottom: 90px;
      z-index: 10001;
      display: grid;
      gap: 8px;
      pointer-events: none;
      width: auto;
      max-width: 90vw;
    }
    .toast {
      padding: 12px 20px;
      border-radius: 10px;
      font-weight: 600;
      font-size: 14px;
      box-shadow: 0 4px 20px rgba(0,0,0,.4);
      text-align: center;
      white-space: nowrap;
      animation: toastIn 0.3s ease-out;
    }
    @keyframes toastIn {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .toast.ok { background: var(--success); color: #0b1020; }
    .toast.err { background: var(--danger); color: #0b1020; }
    .toast.info { background: var(--primary); color: #0b1020; }

    /* Modal */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,.7);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 100;
      padding: 16px;
    }
    .modal-overlay.show { display: flex; }
    .modal {
      background: var(--panel);
      border: var(--border);
      border-radius: 16px;
      padding: 24px;
      width: 100%;
      max-width: 500px;
      max-height: 90vh;
      overflow-y: auto;
    }
    .modal h3 {
      font-size: 18px;
      margin-bottom: 20px;
    }
    .modal-actions {
      display: flex;
      justify-content: flex-end;
      gap: 8px;
      margin-top: 20px;
      position: sticky;
      bottom: -24px;
      background: var(--panel);
      padding: 12px 0;
      margin-bottom: -24px;
    }

    /* Quick Add Modal */
    .quick-add-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-bottom: 20px;
    }
    .quick-add-item {
      padding: 16px;
      border-radius: 12px;
      background: rgba(255,255,255,.05);
      border: 1px solid rgba(255,255,255,.1);
      cursor: pointer;
      text-align: center;
      transition: all .2s;
    }
    .quick-add-item:hover {
      background: var(--primary-ghost);
      border-color: var(--primary);
    }
    .quick-add-item .icon { font-size: 24px; margin-bottom: 8px; }
    .quick-add-item .label { font-size: 13px; }

    /* Settings Tabs */
    .settings-tabs {
      display: flex;
      gap: 4px;
      margin-bottom: 16px;
      border-bottom: 1px solid rgba(255,255,255,.1);
      padding-bottom: 8px;
    }
    .settings-tab {
      padding: 8px 12px;
      background: transparent;
      border: none;
      color: var(--muted);
      cursor: pointer;
      font-size: 13px;
      border-radius: 6px;
    }
    .settings-tab.active {
      background: var(--primary-ghost);
      color: var(--primary);
    }

    /* Category Budget List */
    .category-budget-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px;
      background: rgba(255,255,255,.03);
      border-radius: 8px;
      margin-bottom: 8px;
    }
    .category-budget-item .color {
      width: 24px;
      height: 24px;
      border-radius: 6px;
    }
    .category-budget-item .name { flex: 1; font-weight: 500; }
    .category-budget-item input {
      width: 100px;
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 6px;
      padding: 6px 10px;
      color: var(--text);
      text-align: right;
      font-size: 13px;
    }

    /* Payment Method Selector */
    .payment-methods {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .payment-method {
      padding: 8px 14px;
      border-radius: 20px;
      border: 1px solid var(--input-bd);
      background: transparent;
      color: var(--muted);
      cursor: pointer;
      font-size: 12px;
      transition: all .2s;
    }
    .payment-method:hover { background: rgba(255,255,255,.05); }
    .payment-method.active {
      background: rgba(139,92,246,.15);
      border-color: #a78bfa;
      color: #a78bfa;
    }

    /* Tags Input */
    .tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      padding: 8px;
      background: var(--input-bg);
      border: 1px solid var(--input-bd);
      border-radius: 8px;
      min-height: 44px;
    }
    .tag-item {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 4px 8px;
      background: rgba(255,255,255,.1);
      border-radius: 4px;
      font-size: 12px;
    }
    .tag-item .remove {
      cursor: pointer;
      opacity: 0.6;
    }
    .tag-item .remove:hover { opacity: 1; }
    .tags-input {
      flex: 1;
      min-width: 80px;
      border: none;
      background: transparent;
      color: var(--text);
      outline: none;
      font-size: 13px;
    }

    /* Notifications */
    .notification-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px;
      background: rgba(255,204,102,.1);
      border: 1px solid rgba(255,204,102,.2);
      border-radius: 10px;
      margin-bottom: 8px;
    }
    .notification-item .icon { font-size: 20px; }
    .notification-item .content { flex: 1; }
    .notification-item .title { font-weight: 600; font-size: 14px; }
    .notification-item .desc { font-size: 12px; color: var(--muted); }
    .notification-item .days {
      padding: 4px 10px;
      background: var(--warn);
      color: #0b1020;
      border-radius: 12px;
      font-size: 12px;
      font-weight: 600;
    }
    .alert-day-option {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 4px 10px;
      background: var(--surface);
      border: 1px solid var(--input-bd);
      border-radius: 20px;
      font-size: 12px;
      color: var(--text);
      cursor: pointer;
    }
    .alert-day-option input[type="checkbox"] {
      cursor: pointer;
      accent-color: #7c3aed;
    }

    /* One-time spending */
    .expense-type.onetime {
      background: rgba(249,115,22,.15);
      color: #f97316;
    }
    .calendar-day.has-spending {
      position: relative;
    }
    .calendar-day.has-spending::before {
      content: '';
      position: absolute;
      top: 4px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #f97316;
    }
    .calendar-day.has-spending.has-payment::before {
      left: calc(50% - 8px);
    }
    .calendar-day.has-spending:not(.has-payment)::before {
      left: calc(50% - 3px);
    }
    .calendar-day.workday-zero {
      background: rgba(74,222,128,.25);
      border: 1px solid rgba(74,222,128,.5);
    }
    .calendar-day.workday-recorded {
      border: 1px solid rgba(110,168,254,.4);
    }
    .calendar-day.workday-over {
      border: 1px solid rgba(255,107,107,.5);
    }
    .calendar-day.has-income {
      position: relative;
    }
    .calendar-day.has-income::after {
      content: '';
      position: absolute;
      bottom: 4px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #22c55e;
    }
    .calendar-day.has-payment.has-income::after {
      background: linear-gradient(90deg, var(--warn) 50%, #22c55e 50%);
    }
    .spending-date-info {
      background: rgba(249,115,22,.1);
      border: 1px solid rgba(249,115,22,.2);
      border-radius: 8px;
      padding: 8px 12px;
      font-size: 12px;
      color: #f97316;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* Daily Spending List */
    .daily-spending-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      background: rgba(249,115,22,.05);
      border: 1px solid rgba(249,115,22,.15);
      border-radius: 10px;
      margin-bottom: 8px;
      min-width: 0;
    }
    .daily-spending-item .date-badge {
      padding: 4px 8px;
      background: rgba(249,115,22,.15);
      color: #f97316;
      border-radius: 6px;
      font-size: 11px;
      font-weight: 600;
      white-space: nowrap;
    }
    .daily-spending-item .expense-main { flex: 1; min-width: 0; overflow: hidden; }
    .daily-spending-item .expense-name { font-weight: 600; word-break: break-word; }
    .daily-spending-item .expense-amount {
      font-size: 15px;
      font-weight: 600;
      color: var(--danger);
      white-space: nowrap;
      flex-shrink: 0;
    }

    /* Date Picker Modal */
    .date-modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,.7);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 110;
      padding: 16px;
    }
    .date-modal-overlay.show { display: flex; }

    @media (max-width: 640px) {
      .summary-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
      .summary-grid.three-col { grid-template-columns: repeat(3, 1fr); }
      .summary-grid.four-col { grid-template-columns: repeat(2, 1fr); }
      .summary-card { padding: 12px 8px; }
      .summary-card .value { font-size: 18px; }
      .daily-budget-banner { flex-direction: column; text-align: center; gap: 8px; }
      .daily-budget-right { text-align: center; }
      .budget-row { flex-wrap: wrap; }
      .budget-row input { width: 100%; }
      .form-row { flex-wrap: wrap; }
      .form-row input[type="text"] { width: 100%; }
      .form-row input[type="number"] { flex: 1; }
      .form-row select { flex: 1; }
      .type-toggle { width: 100%; }
      .type-btn { flex: 1; text-align: center; }
      .chart-container { flex-direction: column; }
      .chart-wrap { width: 150px; height: 150px; }
      .expense-item { flex-wrap: wrap; }
      .expense-amounts { width: 100%; flex-direction: row; justify-content: space-between; margin-top: 8px; padding-top: 8px; border-top: 1px dashed rgba(255,255,255,.08); }
      .expense-actions { flex-direction: row; width: 100%; margin-top: 8px; }
      .appbar .wrap { flex-wrap: wrap; }
      .appbar-right { width: 100%; justify-content: flex-end; }
      .heatmap-months { grid-template-columns: repeat(6, 1fr); }
      .fab { bottom: 16px; right: 16px; width: 50px; height: 50px; }
      .quick-add-grid { grid-template-columns: 1fr; }

      /* 단발성 지출 리스트 모바일 최적화 */
      .daily-spending-item {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 12px;
      }
      .daily-spending-item .date-badge {
        flex-shrink: 0;
      }
      .daily-spending-item .expense-main {
        flex: 1;
        min-width: 0;
      }
      .daily-spending-item .expense-main .expense-header {
        flex-wrap: wrap;
        gap: 4px;
      }
      .daily-spending-item .expense-name {
        font-size: 13px;
      }
      .daily-spending-item .expense-amount {
        font-size: 14px;
        white-space: nowrap;
        flex-shrink: 0;
      }
      .daily-spending-item .expense-actions {
        display: flex;
        flex-direction: row;
        gap: 4px;
        flex-shrink: 0;
      }
      .daily-spending-item .btn.sm {
        padding: 4px 8px;
        font-size: 11px;
      }

      /* 고정 지출 리스트 모바일 추가 최적화 */
      .expense-payment-date {
        font-size: 10px;
      }
    }

    /* 극소 화면(< 400px) 단발성 지출 세로 레이아웃 전환 */
    @media (max-width: 400px) {
      .daily-spending-item {
        flex-direction: column;
        align-items: flex-start;
      }
      .daily-spending-item .expense-amount {
        align-self: flex-end;
      }
      .daily-spending-item .expense-actions {
        width: 100%;
        justify-content: flex-end;
      }
      .daily-spending-item > .date-badge {
        order: -1;
      }
    }

    /* Lucide icon styles */
    .lucide-icon { width: 16px; height: 16px; display: inline-block; vertical-align: middle; }
    .lucide-icon-sm { width: 14px; height: 14px; display: inline-block; vertical-align: middle; }
    .lucide-icon-lg { width: 20px; height: 20px; display: inline-block; vertical-align: middle; }
    .lucide-icon-xl { width: 24px; height: 24px; display: inline-block; vertical-align: middle; }
    [data-lucide] { display: inline-block; vertical-align: middle; }
    .brand [data-lucide] { width: 22px; height: 22px; }
    .tab [data-lucide] { width: 14px; height: 14px; }
    .daily-budget-icon [data-lucide] { width: 28px; height: 28px; }
    .btn [data-lucide] { width: 14px; height: 14px; }
    h2 [data-lucide], h3 [data-lucide] { width: 18px; height: 18px; margin-right: 4px; }
    /* === Mobile Usability Improvements === */
    @keyframes spin { 100% { transform: rotate(360deg); } }

    /* Insights */
    .insight-card {
      padding: 16px;
      background: rgba(255,255,255,.03);
      border: 1px solid rgba(255,255,255,.08);
      border-radius: 10px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .light-theme .insight-card {
      background: rgba(0,0,0,.02);
      border-color: rgba(0,0,0,.08);
    }
    .insight-icon {
      flex-shrink: 0;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }
    .insight-icon.info { background: rgba(110,168,254,.15); color: var(--primary); }
    .insight-icon.warning { background: rgba(255,204,102,.15); color: var(--warn); }
    .insight-icon.success { background: rgba(74,222,128,.15); color: var(--success); }
    .insight-icon.danger { background: rgba(255,107,107,.15); color: var(--danger); }
    .insight-content {
      flex: 1;
      min-width: 0;
    }
    .insight-title {
      font-weight: 600;
      font-size: 14px;
      margin-bottom: 4px;
    }
    .insight-desc {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.5;
    }

    @media (max-width: 640px) {
      /* Touch Targets */
      .btn, .tab, .settings-tab, .type-btn, .payment-method {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
      }
      input, select, textarea {
        min-height: 44px;
      }
      .calendar-day {
        min-height: 44px;
      }
      
      /* Spacing */
      .budget-row, .form-row {
        gap: 12px;
        margin-bottom: 16px;
      }
      
      /* FAB Improvement */
      .fab {
        width: 64px !important;
        height: 64px !important;
        bottom: 24px !important;
        right: 24px !important;
        box-shadow: 0 8px 30px rgba(110,168,254,.5) !important;
      }
      .fab i {
        width: 32px !important;
        height: 32px !important;
      }
    }