:root {
  --bg: #f6f6f3;
  --surface: #ffffff;
  --ink: #1d2422;
  --muted: #6b7470;
  --line: #e3e4df;
  --accent: #0f6b5c;
  --accent-soft: #e2f0ec;
  --warn: #a14a12;
  --warn-soft: #fbeee4;
  --danger: #b3261e;
  --due-5: #d4a50a; --due-2: #e8710a; --due-last: #d93025;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121615; --surface: #1b201f; --ink: #e7ebe9; --muted: #95a09b; --line: #2c3331;
    --accent: #4fc0a8; --accent-soft: #173029; --warn: #f0a46b; --warn-soft: #3a2618; --danger: #ff8a80;
    --due-5: #f2c94c; --due-2: #ff9a3c; --due-last: #ff6b5e;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
h1 { font-size: 1.35rem; margin: 0 0 14px; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 0 0 10px; }
.muted { color: var(--muted); }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 16px;
  padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; letter-spacing: 0.06em; color: var(--accent); }
.tabs { display: flex; gap: 4px; overflow-x: auto; }
.tabs button {
  border: 0; background: none; padding: 8px 12px; border-radius: 8px; font: inherit; color: var(--muted); cursor: pointer; white-space: nowrap;
}
.tabs button[aria-selected="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

/* Month bar */
.monthbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px;
  max-width: 920px; margin: 14px auto 0; padding: 10px 16px;
}
.monthbar.adjusted .asof strong { color: var(--warn); }
.adjust { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.stepper { display: flex; gap: 6px; flex-wrap: wrap; }

main { max-width: 920px; margin: 0 auto; padding: 8px 16px 60px; }
.view { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.row-between h1 { margin: 0; }

/* Controls */
input, select {
  font: inherit; color: inherit; background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px;
}
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.lbl { display: block; font-weight: 600; margin-bottom: 6px; }
.btn {
  font: inherit; font-weight: 600; border: 1px solid var(--accent); background: var(--accent); color: #fff;
  border-radius: 8px; padding: 8px 14px; cursor: pointer; white-space: nowrap;
}
.btn.ghost { background: transparent; color: var(--accent); }
.btn.link { background: none; border-color: transparent; color: var(--accent); padding-inline: 6px; }
.btn.danger { background: transparent; color: var(--danger); border-color: transparent; }
.btn.small { padding: 4px 9px; font-size: 0.9em; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.inline-form { display: flex; gap: 6px; }
.filter { width: 100%; margin-bottom: 10px; }

/* Customer picker */
.picker { position: relative; margin-bottom: 18px; }
.picker input { width: 100%; font-size: 16px; }
.dropdown {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 5; margin: 0; padding: 4px;
  list-style: none; max-height: 320px; overflow: auto;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.12);
}
.dropdown li { padding: 8px 10px; border-radius: 6px; cursor: pointer; display: flex; justify-content: space-between; }
.dropdown li[aria-selected="true"], .dropdown li:hover { background: var(--accent-soft); }
.dropdown li .muted { font-size: 0.85em; }

/* Summary */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-bottom: 16px; }
.stat { background: var(--bg); border-radius: 8px; padding: 12px 14px; }
.stat .k { color: var(--muted); font-size: 0.85em; }
.stat .v { font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat.name .v { font-size: 1.15rem; }

/* Tables */
.tbl-wrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; }
.tbl th, .tbl td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; }
.tbl .num { text-align: right; }
.tbl th { font-size: 0.82em; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); font-weight: 600; }
.tbl tfoot td { font-weight: 700; border-bottom: 0; }
.tbl input[type="number"] { width: 72px; padding: 5px 7px; text-align: right; }
.tbl input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }
.pending-neg { color: var(--danger); font-weight: 600; }
.summary-tbl .sel { width: 36px; padding-right: 0; }
.summary-tbl tr.is-selected td { background: var(--accent-soft); }
.summary-tbl tfoot .sel-row td { color: var(--accent); background: var(--accent-soft); border-top: 2px solid var(--accent); }
.summary-tbl tfoot tr:last-child td { border-top: 1px solid var(--line); }

/* Groups */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.card {
  text-align: left; font: inherit; color: inherit; cursor: pointer;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px;
}
.card:hover { border-color: var(--accent); }
/* Months left before the group ends: 5–3 yellow, 2–1 orange, last month red */
.card.due-5, .card.due-2, .card.due-last { border-width: 2px; padding: 11px 13px; }
.card.due-5 { border-color: var(--due-5); }
.card.due-2 { border-color: var(--due-2); }
.card.due-last { border-color: var(--due-last); }
.card .t { font-weight: 700; margin-bottom: 6px; }
.card dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; margin: 0; font-size: 0.9em; }
.card dt { color: var(--muted); }
.card dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.totals { margin-top: 22px; }
.totals h2 { margin-bottom: 6px; }
.totals tfoot td { border-top: 2px solid var(--line); }
.settings { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 10px 0 18px; }
.settings label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85em; color: var(--muted); }
.add-member { display: flex; gap: 6px; flex-wrap: wrap; margin: 14px 0; }
.add-member select { flex: 1 1 200px; }
.add-member input { width: 90px; }

/* Ledger grid */
.ledger td, .ledger th { padding: 4px 4px; text-align: center; white-space: nowrap; }
.ledger th:first-child, .ledger td:first-child { text-align: left; position: sticky; left: 0; background: var(--surface); }
.ledger input { width: 46px; padding: 4px; text-align: center; border-color: transparent; background: var(--bg); }
.ledger input:not(:placeholder-shown) { background: var(--accent-soft); font-weight: 600; }
.ledger th.cur { color: var(--accent); }

#toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 8px; opacity: 0;
  transition: opacity .2s, transform .2s; pointer-events: none; max-width: calc(100% - 32px);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.err { background: var(--danger); color: #fff; }

@media (max-width: 560px) {
  main, .monthbar { padding-inline: 10px; }
  .view { padding: 14px 12px; }
  .topbar { gap: 8px; padding-inline: 10px; }
  .hide-sm { display: none; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat.name { grid-column: 1 / -1; }
  .stat .v { font-size: 1.25rem; }
  .tbl th, .tbl td { padding: 8px 5px; }
  .tbl th { font-size: 0.72em; letter-spacing: 0.02em; }
  .tbl td:first-child, .summary-tbl td:nth-child(2) { white-space: nowrap; }
  .summary-tbl .sel { width: 26px; }
  .summary-tbl { font-size: 13.5px; }
  .summary-tbl th, .summary-tbl td { padding: 8px 2px; }
  .summary-tbl th { font-size: 0.7em; }
}

/* Chit Log */
.log-head { margin-top: 24px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.filters select { padding: 6px 9px; }
.chit-tbl td:last-child { width: 1%; white-space: nowrap; }
.log-tbl .when { white-space: nowrap; font-size: 0.9em; }
.log-tbl tr.cancelled td { color: var(--muted); }
.log-tbl tr.cancelled .amt { text-decoration: line-through; }
.cancel-note { color: var(--danger); }
.sm-only { display: none; }
.small { font-size: 0.86em; }
.tag { display: inline-block; font-size: 0.78em; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: var(--warn-soft); color: var(--warn); }
.sig-btn { display: inline-grid; place-items: center; width: 30px; height: 30px; padding: 0; border-radius: 7px; border: 1px solid var(--line); background: var(--surface); color: var(--accent); cursor: pointer; }
.btn.danger-solid { background: var(--danger); border-color: var(--danger); color: #fff; }

#dialog { border: 0; padding: 0; border-radius: 14px; width: min(520px, calc(100% - 32px)); background: var(--surface); color: var(--ink); box-shadow: 0 20px 50px rgba(0,0,0,.3); }
#dialog::backdrop { background: rgba(10, 14, 13, .5); }
.dlg { display: grid; gap: 14px; padding: 20px 22px; }
.dlg header h2 { margin: 0; }
.dlg header p { margin: 2px 0 0; }
.dlg select, .dlg textarea, .dlg input[type="password"] { width: 100%; font: inherit; color: inherit; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px; }
.dlg-actions { display: flex; align-items: center; gap: 8px; }
.dlg-actions .sp { flex: 1; }
.give-row { display: grid; grid-template-columns: auto 1fr; gap: 8px 12px; align-items: center; }
.give-row .lbl { margin: 0; }
.stepper-num { display: flex; gap: 6px; align-items: center; }
.stepper-num input { width: 72px; text-align: center; }
.stepper-num .btn { width: 40px; padding-inline: 0; }
.give-total { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: baseline; gap: 10px; background: var(--bg); border-radius: 8px; padding: 10px 12px; }
.give-total strong { font-size: 1.15rem; font-variant-numeric: tabular-nums; }
.sigpad-wrap { position: relative; border: 1.5px dashed var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
.sigpad { display: block; width: 100%; height: 220px; cursor: crosshair; }
.sigpad-hint { position: absolute; left: 14px; bottom: 12px; color: #8a918d; font-size: 13px; pointer-events: none; }
.sigpad-wrap.inked .sigpad-hint { display: none; }
.sig-img { display: block; width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
.rcpt { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; margin: 0; }
.rcpt dt { color: var(--muted); }
.rcpt dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }

@media (max-width: 560px) {
  #dialog { width: 100%; max-width: 100%; margin: auto 0 0; border-radius: 18px 18px 0 0; max-height: 94vh; }
  .dlg { padding: 16px 16px calc(22px + env(safe-area-inset-bottom, 0px)); }
  .sigpad { height: 260px; }
  .sm-only { display: block; }
  .lg-only { display: none; }
  .log-tbl { font-size: 13.5px; }
  .log-tbl th, .log-tbl td { padding: 8px 4px; }
  .log-tbl td.when { white-space: normal; min-width: 76px; }
  .log-tbl td.when .btn { margin-top: 6px; padding-inline: 0; }
  .chit-tbl { font-size: 13.5px; }
  .chit-tbl th, .chit-tbl td { padding: 8px 3px; }
  .chit-tbl .btn.small { padding: 4px 8px; }
  .filters { width: 100%; }
  .filters select { flex: 1 1 140px; }
}

/* Summary: Chits left link and payouts; ledger chit cells */
.link-btn { background: none; border: 0; padding: 2px 4px; font: inherit; font-weight: 700; color: var(--accent); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; white-space: nowrap; }
.link-btn:hover { background: var(--accent-soft); border-radius: 6px; }
.cust-payouts { margin-top: 22px; }
.given-cell { white-space: nowrap; }
.given-at { margin-left: 6px; font-size: 0.8em; color: var(--muted); }
.cust-payouts h2 { margin-bottom: 6px; }
.ledger th.signed-col { color: var(--accent); }
.ledger .start-col { border-left: 2px solid var(--accent); }
.ledger input:disabled { opacity: .35; }
.ledger .scell { width: 46px; padding: 4px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; font: inherit; font-weight: 700; cursor: pointer; }

/* Login */
.login-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-box {
  width: 100%; max-width: 360px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 24px;
}
.login-box h1 { margin: 6px 0 18px; }
.login-box form { display: grid; gap: 8px; }
.login-box .btn { width: 100%; padding-block: 10px; margin-top: 6px; }
.pw-row { position: relative; }
.pw-row input { width: 100%; padding: 10px 64px 10px 12px; font: inherit; }
.pw-row .btn { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); width: auto; margin: 0; padding: 4px 8px; }
.login-err { color: var(--danger); margin: 0; font-size: 0.9em; }
.topbar .account { margin-left: auto; display: flex; gap: 2px; flex-shrink: 0; }

/* Paid today → WhatsApp */
.btn.wa { background: #1f8f4e; border-color: #1f8f4e; color: #fff; text-decoration: none; }
.btn.wa.is-disabled { opacity: 0.45; pointer-events: none; }
.share-btns { display: flex; gap: 6px; }
.paid-filters { margin-bottom: 12px; }
.paid-filters input[type="date"], .paid-filters input[type="month"] { padding: 6px 9px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; padding: 3px; margin-bottom: 12px; background: var(--bg); }
.seg button { border: 0; background: none; font: inherit; color: var(--muted); padding: 6px 18px; border-radius: 7px; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.paid-sum { margin: 0 0 8px; }

/* Multi-group picker (Reports) */
.multi { position: relative; }
.multi summary {
  list-style: none; cursor: pointer; padding: 6px 28px 6px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--surface); position: relative; white-space: nowrap; user-select: none;
}
.multi summary::-webkit-details-marker { display: none; }
.multi summary::after { content: '▾'; position: absolute; right: 10px; color: var(--muted); }
.multi-menu {
  position: absolute; z-index: 20; top: calc(100% + 4px); left: 0; min-width: 200px; max-height: 320px; overflow-y: auto;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 6px; box-shadow: 0 8px 24px rgba(0,0,0,.18);
}
.multi-menu label { display: flex; align-items: center; gap: 8px; padding: 7px 8px; border-radius: 6px; cursor: pointer; white-space: nowrap; }
.multi-menu label:hover { background: var(--accent-soft); }
.multi-menu input { width: 17px; height: 17px; accent-color: var(--accent); margin: 0; }
.multi-all { border-bottom: 1px solid var(--line); margin-bottom: 4px; }
@media (max-width: 560px) { .multi { flex: 1 1 140px; } .multi-menu { left: auto; right: 0; } }