:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #16191d;
  --muted: #6b7280;
  --line: #e3e6ea;
  --accent: #2f6f4f;
  --accent-ink: #ffffff;
  --warn: #b45309;
  --warn-bg: #fef3c7;
  --bad: #b91c1c;
  --bad-bg: #fee2e2;
  --good: #166534;
  --good-bg: #dcfce7;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a; --card: #1c2024; --ink: #e8eaed; --muted: #9aa3ad;
    --line: #2c3238; --accent: #4c9a72; --warn-bg: #4a3410; --bad-bg: #4a1d1d;
    --good-bg: #14331f;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: var(--accent); }

.topbar {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  justify-content: space-between;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
.topbar nav { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.topbar nav a { text-decoration: none; font-size: 14px; }
form.inline { display: inline; margin: 0; }
button.link {
  background: none; border: 0; color: var(--muted); font-size: 14px;
  cursor: pointer; padding: 0; text-decoration: underline;
}

main { max-width: 900px; margin: 0 auto; padding: 16px; }
.foot { max-width: 900px; margin: 0 auto; padding: 8px 16px 40px; color: var(--muted); font-size: 12px; }
.foot a { color: var(--muted); }

h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 24px 0 8px; }
h3 { font-size: 16px; margin: 18px 0 6px; }
.sub { color: var(--muted); font-size: 14px; margin: 0 0 16px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px; margin-bottom: 14px;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input, select, textarea {
  width: 100%; padding: 10px; font-size: 16px; font-family: inherit;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink);
}
textarea { min-height: 70px; }
input[type=checkbox] { width: auto; }

button, .btn {
  display: inline-block; padding: 10px 14px; font-size: 15px; font-family: inherit;
  border-radius: 8px; border: 1px solid var(--accent); background: var(--accent);
  color: var(--accent-ink); cursor: pointer; text-decoration: none;
}
button.sec, .btn.sec { background: transparent; color: var(--accent); }
button.danger, .btn.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
button:disabled { opacity: .5; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 7px 8px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.total td { font-weight: 700; border-top: 2px solid var(--line); }

.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.pill.good { background: var(--good-bg); color: var(--good); }
.pill.warn { background: var(--warn-bg); color: var(--warn); }
.pill.bad  { background: var(--bad-bg);  color: var(--bad); }
.pill.mute { background: var(--line); color: var(--muted); }

.pos { color: var(--good); font-weight: 600; }
.neg { color: var(--bad); font-weight: 600; }

.note { font-size: 13px; color: var(--muted); }
.warnbox { background: var(--warn-bg); color: var(--warn); padding: 10px 12px; border-radius: 8px; font-size: 14px; margin: 8px 0; }
.badbox  { background: var(--bad-bg);  color: var(--bad);  padding: 10px 12px; border-radius: 8px; font-size: 14px; margin: 8px 0; }
.goodbox { background: var(--good-bg); color: var(--good); padding: 10px 12px; border-radius: 8px; font-size: 14px; margin: 8px 0; }
.err { color: var(--bad); font-size: 14px; margin: 8px 0; }

/* the tick-box receipt list */
.items { list-style: none; padding: 0; margin: 0; }
.item {
  display: flex; gap: 10px; align-items: flex-start; padding: 10px 8px;
  border-bottom: 1px solid var(--line);
}
.item:last-child { border-bottom: 0; }
.item .who { flex: 1; }
.item .nm { font-weight: 600; }
.item .gl { color: var(--muted); font-size: 13px; }
.item .amt { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }
.item.claimed { background: color-mix(in srgb, var(--good-bg) 55%, transparent); }
.item .ticks { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.item .ticks label {
  display: inline-flex; align-items: center; gap: 4px; margin: 0;
  padding: 4px 8px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 13px; cursor: pointer; color: var(--ink);
}
.item .ticks input { margin: 0; }
.qtybox { display: flex; gap: 4px; align-items: center; font-size: 12px; color: var(--muted); }
.qtybox input { width: 52px; padding: 4px; font-size: 13px; }

.receipts { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; }
.receipts figure { margin: 0; flex: 0 0 auto; }
.receipts img {
  height: 190px; border-radius: 8px; border: 1px solid var(--line); background: #fff; cursor: zoom-in;
}
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.tabs a { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: 13px; }
details > summary { cursor: pointer; font-size: 14px; color: var(--muted); padding: 6px 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* receipt lightbox */
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,.88); display: none;
  align-items: center; justify-content: center; z-index: 100; padding: 12px;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 100%; max-height: 100%; object-fit: contain; }
.lightbox .close { position: absolute; top: 14px; right: 16px; color: #fff; font-size: 28px; background: none; border: 0; cursor: pointer; }