:root {
  --bg: #f6f7f5; --card: #fff; --ink: #1d2420; --muted: #5d6862; --line: #e2e6e3;
  --brand: #0f6e56; --brand-ink: #fff; --brand-soft: #e3f2ec;
  --good: #1e7a46; --good-bg: #e2f4e8; --warn: #9a5b00; --warn-bg: #fdf1dc; --bad: #b42318; --bad-bg: #fde8e6;
  --radius: 12px; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121614; --card: #1b201d; --ink: #e7ece9; --muted: #9aa69f; --line: #2c3430;
    --brand: #3fb38c; --brand-ink: #08130e; --brand-soft: #173329;
    --good: #5cd08d; --good-bg: #16301f; --warn: #f0b75a; --warn-bg: #33270f; --bad: #ff8a80; --bad-bg: #3a1a17; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
h1 { font-size: 1.5rem; margin: 0 0 .25rem; line-height: 1.25; }
h2 { font-size: 1.05rem; margin: 0 0 .75rem; }
p { margin: 0 0 .75rem; }
code { background: var(--brand-soft); padding: 1px 5px; border-radius: 5px; font-size: .9em; word-break: break-all; }
code.copy { cursor: copy; } code.copy[data-copied]::after { content: " ✓ copied"; color: var(--good); }
.muted { color: var(--muted); } .small, small { font-size: .85rem; }
.good { color: var(--good); } .bad { color: var(--bad); }

/* top bar */
.top { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.25rem; padding: .6rem 1rem; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.nav { display: flex; gap: .25rem; overflow-x: auto; flex: 1 1 auto; scrollbar-width: none; }
.nav a { padding: .35rem .7rem; border-radius: 8px; color: var(--muted); text-decoration: none; white-space: nowrap; }
.nav a.on, .nav a:hover { background: var(--brand-soft); color: var(--ink); }
.out { display: flex; gap: .6rem; align-items: center; color: var(--muted); font-size: .9rem; margin-left: auto; }
.linkish { background: none; border: 0; color: var(--brand); cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }
@media (max-width: 720px) { .nav { order: 3; flex-basis: 100%; } .out span { display: none; } }

main { max-width: 1180px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
main.narrow { max-width: 460px; padding-top: 12vh; }
.page-h { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: .75rem; margin-bottom: 1rem; }
.crumb { margin: 0; font-size: .9rem; }
.actions { display: flex; flex-wrap: wrap; gap: .5rem; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; margin-bottom: 1rem; }
.card.flush { padding: 0; overflow-x: auto; } .card .pad { padding: 1rem 1.2rem 0; }
.card.attn { border-color: var(--warn); background: linear-gradient(var(--warn-bg), var(--warn-bg)) padding-box; }
.narrow-card { max-width: 480px; }
.login h1 { font-size: 1.4rem; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 0 1rem; }

.flash { padding: .7rem 1rem; border-radius: 10px; margin-bottom: 1rem; }
.flash.ok { background: var(--good-bg); color: var(--good); } .flash.err { background: var(--bad-bg); color: var(--bad); }

/* buttons and forms */
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .55rem 1rem; border-radius: 9px; border: 1px solid var(--brand); background: var(--brand); color: var(--brand-ink); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--brand); }
.btn.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn.sm { padding: .3rem .65rem; font-size: .85rem; }
.btn:hover { filter: brightness(1.07); }
.form { display: grid; gap: .8rem; }
.form.grid2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: .9rem 1.2rem; }
.span2 { grid-column: 1 / -1; }
label { display: grid; gap: .3rem; font-weight: 600; font-size: .92rem; }
label small { font-weight: 400; color: var(--muted); }
label.check { display: flex; gap: .5rem; align-items: center; font-weight: 400; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 9px; padding: .55rem .7rem; width: 100%; min-width: 0; }
input[type=checkbox] { width: auto; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand); outline-offset: 0; border-color: transparent; }
.field-err { color: var(--bad); font-weight: 600; }
.form-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.filters { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.filters input, .filters select { width: auto; flex: 1 1 160px; }
.inline { display: flex; gap: .4rem; } .inline input { width: 12rem; }
.inline-label { display: flex; align-items: center; gap: .5rem; } .inline-label input { width: 5rem; }
.suffix { display: flex; align-items: center; gap: .3rem; } .suffix span { color: var(--muted); font-weight: 400; white-space: nowrap; }

/* numbers */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1.1rem; display: grid; gap: .15rem; }
.stat span { color: var(--muted); font-size: .88rem; } .stat b { font-size: 1.45rem; } .stat small { color: var(--muted); }
.stat.warn { border-color: var(--warn); } .stat.warn b { color: var(--warn); }
.meter { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-top: .3rem; } .meter span { display: block; height: 100%; background: var(--brand); }

/* lists and tables */
.rows { list-style: none; margin: 0; padding: 0; }
.rows li { display: flex; justify-content: space-between; gap: 1rem; padding: .55rem 0; border-top: 1px solid var(--line); }
.rows li:first-child { border-top: 0; }
.rows.small li { font-size: .88rem; display: grid; gap: .1rem; }
.more { display: inline-block; margin-top: .5rem; font-size: .9rem; }
.tbl { width: 100%; border-collapse: collapse; }
.tbl th, .tbl td { text-align: left; padding: .6rem .8rem; border-top: 1px solid var(--line); vertical-align: top; }
.tbl thead th { border-top: 0; color: var(--muted); font-size: .82rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.tbl .r { text-align: right; white-space: nowrap; }
.tbl td.msg { max-width: 420px; font-size: .88rem; }
.tag { background: var(--brand-soft); color: var(--ink); border-radius: 6px; padding: 0 .4rem; font-size: .75rem; }
.tag.off { background: var(--line); color: var(--muted); }
.pill { display: inline-block; border-radius: 999px; padding: .05rem .6rem; font-size: .8rem; font-weight: 600; white-space: nowrap; background: var(--line); color: var(--muted); }
.pill.paid, .pill.approved { background: var(--good-bg); color: var(--good); }
.pill.part, .pill.pending { background: var(--warn-bg); color: var(--warn); }
.pill.owed, .pill.rejected { background: var(--bad-bg); color: var(--bad); }
.tabs { display: flex; gap: .25rem; overflow-x: auto; margin-bottom: 1rem; }
.tabs a { padding: .4rem .8rem; border-radius: 8px; text-decoration: none; color: var(--muted); white-space: nowrap; }
.tabs a.on { background: var(--card); border: 1px solid var(--line); color: var(--ink); font-weight: 600; }

/* months grid */
.months { display: grid; grid-template-columns: repeat(auto-fill, minmax(52px, 1fr)); gap: .4rem; }
.mo { display: grid; place-items: center; border-radius: 8px; padding: .35rem 0; line-height: 1.1; font-size: .85rem; }
.mo small { font-size: .7rem; opacity: .8; }
.mo.paid { background: var(--good-bg); color: var(--good); } .mo.part { background: var(--warn-bg); color: var(--warn); } .mo.owed { background: var(--bad-bg); color: var(--bad); }
.legend { margin-top: .6rem; font-size: .85rem; color: var(--muted); display: flex; gap: .4rem; align-items: center; flex-wrap: wrap; }
.legend .mo { display: inline-block; width: 14px; height: 14px; padding: 0; border-radius: 4px; }
.raw, .pre { white-space: pre-wrap; word-break: break-word; font-size: .9rem; margin: 0; }

/* WhatsApp */
.btn.wa { background: #25d366; border-color: #25d366; color: #073b20; }
.btn.wa.sm { padding: .3rem .65rem; font-size: .85rem; }
.flash .inline { display: inline-flex; margin-left: .4rem; }
.count { display: inline-block; min-width: 1.6rem; text-align: center; background: #25d366; color: #073b20; border-radius: 999px; padding: 0 .45rem; font-size: .85rem; }
.card.quiet h2 { margin-bottom: .3rem; }
.outbox { list-style: none; margin: 0; padding: 0; }
.outbox li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .6rem 1rem; padding: .75rem 0; border-top: 1px solid var(--line); transition: opacity .3s; }
.outbox li:first-child { border-top: 0; }
.outbox li.done { opacity: .35; }
.outbox .msg { margin: .25rem 0 0; font-size: .9rem; color: var(--muted); max-width: 640px; }
.ob-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
label.check span { font-weight: 400; }
.join-box { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .6rem 1rem; }
.btn .count { margin-left: .2rem; }