:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --surface-2:      #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);
  --danger:         #d03b3b;
  --danger-wash:    rgba(208,59,59,0.08);

  --series-1:       #2a78d6;

  --status-good:     #0ca30c;
  --status-warning:  #fab219;
  --status-critical: #d03b3b;
  --status-good-wash:     rgba(12,163,12,0.10);
  --status-warning-wash:  rgba(250,178,25,0.14);
  --status-critical-wash: rgba(208,59,59,0.10);

  --cat-food:          #2a78d6;
  --cat-transport:     #008300;
  --cat-shopping:      #e87ba4;
  --cat-entertainment: #eda100;
  --cat-health:        #1baf7a;
  --cat-housing:       #eb6834;
  --cat-utilities:     #4a3aa7;
  --cat-other:         #e34948;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --surface-2:      #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255,255,255,0.10);
    --danger:         #e66767;
    --danger-wash:    rgba(230,103,103,0.12);

    --series-1:       #3987e5;

    --status-good:     #0ca30c;
    --status-warning:  #fab219;
    --status-critical: #d03b3b;
    --status-good-wash:     rgba(12,163,12,0.16);
    --status-warning-wash:  rgba(250,178,25,0.16);
    --status-critical-wash: rgba(208,59,59,0.18);

    --cat-food:          #3987e5;
    --cat-transport:     #008300;
    --cat-shopping:      #d55181;
    --cat-entertainment: #c98500;
    --cat-health:        #199e70;
    --cat-housing:       #d95926;
    --cat-utilities:     #9085e9;
    --cat-other:         #e66767;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1:      #1a1a19;
  --surface-2:      #0d0d0d;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #898781;
  --gridline:       #2c2c2a;
  --baseline:       #383835;
  --border:         rgba(255,255,255,0.10);
  --danger:         #e66767;
  --danger-wash:    rgba(230,103,103,0.12);

  --series-1:       #3987e5;

  --status-good:     #0ca30c;
  --status-warning:  #fab219;
  --status-critical: #d03b3b;
  --status-good-wash:     rgba(12,163,12,0.16);
  --status-warning-wash:  rgba(250,178,25,0.16);
  --status-critical-wash: rgba(208,59,59,0.18);

  --cat-food:          #3987e5;
  --cat-transport:     #008300;
  --cat-shopping:      #d55181;
  --cat-entertainment: #c98500;
  --cat-health:        #199e70;
  --cat-housing:       #d95926;
  --cat-utilities:     #9085e9;
  --cat-other:         #e66767;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--surface-2);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---------------- Login ---------------- */

.login-view {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-view[hidden] { display: none; }

.login-card {
  width: 100%;
  max-width: 320px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-icon { font-size: 40px; }

.login-card h1 {
  font-size: 20px;
  margin: 0 0 8px;
}

.login-card input {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px;
  font-size: 15px;
  background: var(--surface-2);
  color: var(--text-primary);
  text-align: center;
}

.login-error {
  color: var(--danger);
  font-size: 13px;
  margin: 0;
}

/* ---------------- Layout ---------------- */

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 16px calc(88px + env(safe-area-inset-bottom));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.topbar h1 {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

.month-nav-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 12px;
}

.month-label {
  font-size: 14px;
  color: var(--text-secondary);
  min-width: 108px;
  text-align: center;
}

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
}

.icon-btn:hover { background: var(--gridline); }
.icon-btn:active { transform: translateY(1px); }

/* ---------------- Tab bar ---------------- */

.tab-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: center;
  gap: 4px;
  background: var(--surface-1);
  border-top: 1px solid var(--border);
  padding: 8px max(12px, env(safe-area-inset-left)) calc(8px + env(safe-area-inset-bottom));
  z-index: 10;
}

.tab-btn {
  flex: 1;
  max-width: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 11px;
  padding: 6px 8px;
  border-radius: 10px;
  cursor: pointer;
}

.tab-btn .tab-icon { font-size: 20px; line-height: 1; }

.tab-btn.active {
  color: var(--text-primary);
  background: var(--surface-2);
}

@media (min-width: 640px) {
  .tab-bar {
    position: static;
    justify-content: flex-start;
    border-top: none;
    border-bottom: 1px solid var(--border);
    padding: 0 0 12px;
    margin-bottom: 16px;
    background: transparent;
  }
  .tab-btn {
    flex: none;
    flex-direction: row;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
  }
  .tab-btn .tab-icon { font-size: 15px; }
  .app { padding-bottom: 48px; }
}

/* ---------------- Hero / cards ---------------- */

.hero {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 20px;
  text-align: center;
  margin-bottom: 12px;
}

.hero-value {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: proportional-nums;
}

.hero-caption {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.chart-card, .form-card, .list-card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 14px;
}

.chart-card .card-title { margin-bottom: 14px; }

/* ---------------- Category bar chart (Home) ---------------- */

.chart {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chart-row {
  display: grid;
  grid-template-columns: 96px 1fr 64px;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.chart-row .cat-label {
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chart-row .bar-track {
  height: 10px;
  background: var(--gridline);
  border-radius: 5px;
  overflow: hidden;
}

.chart-row .bar-fill {
  height: 100%;
  border-radius: 5px;
  min-width: 4px;
  transition: width 0.3s ease;
}

.chart-row .cat-amount {
  text-align: right;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

/* ---------------- Trend line chart (Insights) ---------------- */

.trend-chart, .dow-chart {
  position: relative;
}

.trend-chart svg, .dow-chart svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.trend-line {
  fill: none;
  stroke: var(--series-1);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trend-area { fill: var(--series-1); opacity: 0.10; }

.trend-dot {
  fill: var(--surface-1);
  stroke: var(--series-1);
  stroke-width: 2;
}

.trend-dot.hovered { fill: var(--series-1); }

.trend-axis-label, .dow-axis-label {
  fill: var(--text-muted);
  font-size: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.trend-gridline, .dow-baseline {
  stroke: var(--gridline);
  stroke-width: 1;
}

.dow-bar {
  fill: var(--series-1);
  rx: 3;
}

.dow-bar.hovered { opacity: 0.85; }

.dow-hit { fill: transparent; cursor: pointer; }

.viz-tooltip {
  position: fixed;
  pointer-events: none;
  background: var(--text-primary);
  color: var(--surface-1);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
  white-space: nowrap;
  transform: translate(-50%, -130%);
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* ---------------- Stat tiles ---------------- */

.stat-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 16px;
  text-align: center;
}

.stat-tile-value {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-tile-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---------------- Budgets ---------------- */

.budget-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.budget-row .budget-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 13px;
}

.budget-row .budget-cat {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.budget-row .budget-amounts {
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.budget-row .budget-amounts .over { color: var(--status-critical); font-weight: 600; }

.budget-track {
  height: 10px;
  background: var(--gridline);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 6px;
}

.budget-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.3s ease;
}

.budget-fill.good { background: var(--status-good); }
.budget-fill.warning { background: var(--status-warning); }
.budget-fill.critical { background: var(--status-critical); }

.budget-status-label {
  font-size: 11px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
}

.budget-status-label.good { color: var(--status-good); background: var(--status-good-wash); }
.budget-status-label.warning { color: var(--status-warning); background: var(--status-warning-wash); }
.budget-status-label.critical { color: var(--status-critical); background: var(--status-critical-wash); }

.budget-edit {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.budget-edit .currency { color: var(--text-muted); font-size: 14px; }

.budget-edit input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  background: var(--surface-2);
  color: var(--text-primary);
}

.budget-edit button {
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  background: var(--text-primary);
  color: var(--surface-1);
  cursor: pointer;
}

.budget-edit button:hover { opacity: 0.9; }

.no-budget .budget-track { display: none; }

/* ---------------- Feedback ---------------- */

#feedbackForm {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.kind-toggle {
  display: flex;
  gap: 8px;
}

.kind-btn {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  font-size: 14px;
  font-weight: 500;
  background: var(--surface-2);
  color: var(--text-secondary);
  cursor: pointer;
}

.kind-btn.active {
  background: var(--text-primary);
  color: var(--surface-1);
  border-color: var(--text-primary);
}

#feedbackText {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  background: var(--surface-2);
  color: var(--text-primary);
  resize: vertical;
  min-height: 64px;
}

.feedback-divider {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 14px 16px 4px;
}

.feedback-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--gridline);
}

.feedback-row:last-child { border-bottom: none; }

.feedback-check-btn {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: transparent;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  margin-top: 1px;
}

.feedback-row.done .feedback-check-btn {
  background: var(--status-good);
  border-color: var(--status-good);
  color: var(--surface-1);
}

.feedback-main { flex: 1; min-width: 0; }

.feedback-text {
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

.feedback-row.done .feedback-text {
  color: var(--text-muted);
  text-decoration: line-through;
}

.feedback-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
}

.feedback-delete-btn {
  flex: none;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 2px;
}

.feedback-delete-btn:hover { color: var(--danger); }

/* ---------------- Add-expense form ---------------- */

#expenseForm {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.row-amount {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0 12px;
  background: var(--surface-2);
}

.row-amount .currency {
  font-size: 22px;
  color: var(--text-muted);
  margin-right: 4px;
}

.row-amount input {
  border: none;
  background: transparent;
  font-size: 22px;
  font-weight: 600;
  padding: 12px 0;
  width: 100%;
  color: var(--text-primary);
}

.row-amount input:focus { outline: none; }

#description {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  background: var(--surface-2);
  color: var(--text-primary);
}

.row-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

#category, #date {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  background: var(--surface-2);
  color: var(--text-primary);
  width: 100%;
}

input, select {
  font-family: inherit;
}

.add-btn {
  margin-top: 4px;
  padding: 13px;
  border: none;
  border-radius: 10px;
  background: var(--text-primary);
  color: var(--surface-1);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.add-btn:hover { opacity: 0.9; }
.add-btn:active { transform: translateY(1px); }

/* ---------------- Expense list ---------------- */

.list-card { padding: 8px 4px; }

.empty-state {
  text-align: center;
  padding: 32px 20px;
  color: var(--text-secondary);
}

.empty-state .muted { color: var(--text-muted); font-size: 13px; }

.day-group { padding: 8px 16px; }

.day-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  padding: 8px 0 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.expense-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--gridline);
}

.day-group .expense-row:last-child { border-bottom: none; }

.cat-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: none;
}

.expense-main {
  flex: 1;
  min-width: 0;
}

.expense-desc {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.expense-cat {
  font-size: 12px;
  color: var(--text-muted);
}

.expense-amount {
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.delete-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 2px;
  flex: none;
}

.delete-btn:hover { color: var(--danger); }