:root {
  --bg: #f6f5f2; --card: #fff; --ink: #1b1a17; --muted: #6f6a61;
  --line: #e2ded6; --accent: #b4531f; --accent-soft: #fbeee5;
  --good: #2f7a52; --danger: #a8321f;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141311; --card: #1e1d1a; --ink: #f2efe9; --muted: #9b948a;
    --line: #302e2a; --accent: #e0803f; --accent-soft: #2a211a;
    --good: #5cb98a; --danger: #e0705c;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  padding: env(safe-area-inset-top) 0 calc(env(safe-area-inset-bottom) + 80px);
  -webkit-tap-highlight-color: transparent;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--danger); margin: 4px 0 0; font-size: .9rem; }
h1 { font-size: 1.25rem; margin: 0; }
.logo { font-size: 1.4rem; letter-spacing: -.02em; }
h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .07em;
     color: var(--muted); margin: 22px 0 10px; font-weight: 600; }
button { font: inherit; cursor: pointer; border-radius: 10px; border: 1px solid transparent;
         background: var(--accent); color: #fff; padding: 10px 14px; }
button:active { transform: translateY(1px); }
button.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
button.wide { width: 100%; margin-top: 12px; }
button.link { background: none; color: var(--muted); border: 0; padding: 6px 8px; font-size: .85rem; }
button.link:hover { color: var(--ink); }
button.center { display: block; margin: 8px auto 0; }
button.danger-btn { color: var(--danger); border-color: var(--line); }
button.back { padding: 0 0 2px; }
input, select {
  font: inherit; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); min-width: 0;
}
input:focus-visible, button:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px; }

.centered { min-height: 100dvh; display: grid; place-items: center; padding: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
        padding: 24px; width: min(420px, 100%); }
.card-head { display: flex; align-items: center; justify-content: space-between; }
.card h2:first-of-type { margin-top: 20px; }
.stack { display: grid; gap: 10px; }
form.card { display: grid; gap: 10px; }
form.card p { margin: 0; }

header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
         padding: 18px 20px 14px; max-width: 720px; margin: 0 auto; }
.brand p { margin: 2px 0 0; font-size: .85rem; }
.pot { text-align: right; flex: none; }
.pot-amount { display: block; font-size: 1.6rem; font-weight: 700; color: var(--accent);
              font-variant-numeric: tabular-nums; }
.pot-label { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.tabs { display: flex; gap: 14px; padding: 0 20px; max-width: 720px; margin: 0 auto 4px;
        border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab { background: none; color: var(--muted); border: 0; border-bottom: 2px solid transparent;
       border-radius: 0; padding: 10px 2px; white-space: nowrap; }
.tab.active { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
main { max-width: 720px; margin: 0 auto; padding: 4px 20px 40px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--card); border: 1px solid var(--line); color: var(--ink);
        padding: 8px 14px; border-radius: 999px; }
.chip.selected { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip.me { opacity: .45; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.rule-btn { background: var(--card); border: 1px solid var(--line); color: var(--ink);
            padding: 16px 14px; border-radius: var(--radius); text-align: left; }
.rule-btn strong { display: block; font-weight: 600; }
.rule-btn span { color: var(--accent); font-variant-numeric: tabular-nums; font-size: .9rem; }
.rule-btn:disabled { opacity: .45; cursor: not-allowed; }

.list { display: grid; gap: 8px; }
.item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
        padding: 12px 14px; display: flex; align-items: center; gap: 12px; }
.item .grow { flex: 1; min-width: 0; }
.item .name { font-weight: 600; }
.item .sub { font-size: .8rem; color: var(--muted); }
.item .amount { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }
.item.voided .amount, .item.voided .name { text-decoration: line-through; color: var(--muted); }
.item.tappable { cursor: pointer; text-align: left; width: 100%; }
.amount.owed { color: var(--accent); }
.amount.clear { color: var(--good); }
.badge { font-size: .68rem; text-transform: uppercase; letter-spacing: .06em;
         background: var(--accent-soft); color: var(--accent); padding: 2px 7px;
         border-radius: 999px; margin-left: 6px; vertical-align: 1px; }
.row-form { display: flex; gap: 8px; margin-top: 12px; }
.row-form input, .row-form select { flex: 1; }
#rule-amount { max-width: 100px; flex: 0 0 auto; }
#create-currency, #setting-currency { flex: 0 0 auto; max-width: 90px; }
.join-box .code { font-size: 1.5rem; font-weight: 700; letter-spacing: .12em;
                  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.stat-row { display: flex; gap: 10px; margin: 4px 0 14px; }
.stat { flex: 1; background: var(--card); border: 1px solid var(--line);
        border-radius: var(--radius); padding: 12px; text-align: center; }
.stat b { display: block; font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.stat span { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }

.toast { position: fixed; left: 50%; transform: translateX(-50%);
         bottom: calc(20px + env(safe-area-inset-bottom)); z-index: 20;
         background: var(--ink); color: var(--bg); border-radius: 999px;
         padding: 10px 10px 10px 18px; display: flex; align-items: center; gap: 12px;
         box-shadow: 0 8px 24px rgb(0 0 0 / .22); max-width: calc(100vw - 32px); }
.toast span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.toast button { background: var(--accent); color: #fff; padding: 6px 12px; border-radius: 999px;
                font-size: .85rem; flex: none; }
.empty { color: var(--muted); font-size: .9rem; padding: 8px 2px; }