:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --accent-soft: #eef2ff;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --charge: #b91c1c;
  --charge-soft: #fee2e2;
  --payment: #15803d;
  --payment-soft: #dcfce7;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 15px;
  line-height: 1.45;
}

/* ------------------------------------------------------------------ header */

.site-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.site-header h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.02em;
}

.site-header p {
  margin: 4px 0 0;
  color: var(--muted);
}

/* ------------------------------------------------------------------ layout */

.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.card-head h2 {
  margin: 0;
  font-size: 18px;
}

.muted {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13.5px;
}

.hint {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 12.5px;
}

/* ----------------------------------------------------------------- buttons */

.btn {
  font: inherit;
  font-size: 13.5px;
  font-weight: 500;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  background: #f3f4f6;
}

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

.btn-primary:hover {
  background: var(--accent-dark);
}

.btn-small {
  padding: 3px 10px;
  font-size: 12.5px;
}

.btn-icon {
  padding: 7px 10px;
  font-size: 14px;
  line-height: 1.1;
}

.btn-danger {
  color: var(--danger);
  border-color: #f3d1d1;
}

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

/* --------------------------------------------------------------- toolbars */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}

.toolbar input,
.toolbar select {
  font: inherit;
  font-size: 13.5px;
  color: var(--text);
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

.toolbar input:focus,
.toolbar select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.toolbar .search {
  flex: 1 1 170px;
  min-width: 140px;
}

.toolbar .date-like {
  width: 140px;
}

.toolbar .amount-like {
  width: 104px;
}

.toolbar .count {
  margin-left: auto;
  color: var(--muted);
  font-size: 12.5px;
}

.toolbar input.invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

/* ------------------------------------------------------------------ tables */

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

th {
  text-align: left;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr {
  cursor: pointer;
}

tbody tr:hover {
  background: #f9fafb;
}

tr.selected {
  background: var(--accent-soft);
}

tr.selected:hover {
  background: #e5e9ff;
}

th.num,
td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

td .sub {
  font-size: 12.5px;
  color: var(--muted);
}

td.actions {
  text-align: right;
  white-space: nowrap;
}

td.actions .btn {
  margin-left: 6px;
}

.owe {
  color: var(--charge);
  font-weight: 600;
}

.settled {
  color: var(--payment);
  font-weight: 600;
}

/* ------------------------------------------------------- transaction badges */

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-charge {
  background: var(--charge-soft);
  color: var(--charge);
}

.badge-payment {
  background: var(--payment-soft);
  color: var(--payment);
}

.amount-charge {
  color: var(--charge);
  font-weight: 600;
}

.amount-payment {
  color: var(--payment);
  font-weight: 600;
}

/* ------------------------------------------------------------------- forms */

.form {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: #fafbfc;
  padding: 14px;
  margin-bottom: 14px;
}

.form h3 {
  margin: 0 0 10px;
  font-size: 15px;
}

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

.span-2 {
  grid-column: span 2;
}

@media (max-width: 560px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: span 1;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
  min-width: 0;
}

.field input,
.field select,
.field textarea {
  font: inherit;
  color: var(--text);
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  min-width: 0;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.form-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

/* -------------------------------------------------------- date + orders */

.date-row {
  display: flex;
  gap: 6px;
  position: relative;
}

.date-row > input[type="text"] {
  flex: 1;
}

/* Sits invisibly over the button so the native popup opens in the right spot. */
.native-date {
  position: absolute;
  top: 0;
  right: 0;
  width: 42px;
  height: 100%;
  padding: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
}

.order-row {
  display: flex;
  gap: 6px;
}

.order-row input {
  flex: 1;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.chips:empty {
  display: none;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 13px;
}

.chip button {
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  color: inherit;
}

.chip button:hover {
  color: var(--danger);
}

/* ---------------------------------------------------------- misc / states */

.empty {
  margin: 0;
  padding: 14px 4px;
  color: var(--muted);
  font-size: 14px;
}

.totals {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--muted);
}

.totals b {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.totals .total-balance {
  font-weight: 600;
}

.totals .total-balance b {
  font-size: 15px;
}

.error-banner {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  max-width: 90vw;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--danger);
  color: #fff;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.hidden {
  display: none !important;
}