/* Abacus: flat, typographic, monospace. One ink, one muted grey, hairlines. */
:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --ink: #0c0c0c;
  --muted: #6b6b6b;
  --faint: #a3a3a3;
  --line: #e7e5e4;
  --hover: #f2f1ef;
  --bad: #b42318;
  --good: #1f6f43;
  --warn: #8a5a00;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 6px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0c0c; --surface: #141414; --ink: #ededed; --muted: #9a9a9a; --faint: #5c5c5c;
    --line: #262626; --hover: #1c1c1c; --bad: #f97066; --good: #6ce9a6; --warn: #fdb022;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0c0c0c; --surface: #141414; --ink: #ededed; --muted: #9a9a9a; --faint: #5c5c5c;
  --line: #262626; --hover: #1c1c1c; --bad: #f97066; --good: #6ce9a6; --warn: #fdb022;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: inherit; }
[hidden] { display: none !important; }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; margin: 0; }
h1 { font-size: 22px; }
h2 { font-size: 15px; margin-bottom: 10px; }
h3 { font-size: 13px; color: var(--muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.small { font-size: 12px; }
.error { color: var(--bad); }
.num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.wordmark { font-weight: 700; letter-spacing: -0.02em; text-decoration: none; }

/* Login */
.login { min-height: 100vh; min-height: 100dvh; display: grid; place-items: center; padding: 24px 16px; }
.login-inner { width: 100%; max-width: 340px; display: grid; gap: 14px; }
.login .wordmark { font-size: 34px; }

/* Shell */
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.small-mark { font-size: 16px; }
.top nav { display: flex; gap: 2px; overflow-x: auto; }
.top nav a { text-decoration: none; color: var(--muted); padding: 6px 8px; border-radius: var(--radius); white-space: nowrap; }
.top nav a.active { color: var(--ink); background: var(--hover); }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 60px; display: grid; gap: 28px; }

/* Blocks */
.section { display: grid; gap: 10px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--surface); padding: 14px; display: grid; gap: 4px; }
.stat .label { color: var(--muted); font-size: 12px; }
.stat .value { font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; display: grid; gap: 10px; }
.callout { border: 1px solid var(--ink); border-radius: var(--radius); padding: 14px; display: grid; gap: 10px; background: var(--surface); }
.callout.bad { border-color: var(--bad); }
.bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--ink); }

/* Lists */
.list { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.item { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 12px 14px; border-top: 1px solid var(--line); text-decoration: none; }
.item:first-child { border-top: 0; }
a.item:hover { background: var(--hover); }
.item .sub { color: var(--muted); font-size: 12px; }
.empty { padding: 14px; color: var(--muted); }

.pill { display: inline-block; font-size: 11px; padding: 1px 7px; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); text-transform: lowercase; white-space: nowrap; }
.pill.paid { color: var(--good); border-color: currentColor; }
.pill.overdue, .pill.send_uncertain { color: var(--bad); border-color: currentColor; }
.pill.draft { color: var(--warn); border-color: currentColor; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
th, td { padding: 7px 10px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; font-size: 13px; }
th { color: var(--muted); font-weight: 500; font-size: 12px; position: sticky; top: 0; background: var(--surface); }
th:first-child, td:first-child { text-align: left; position: sticky; left: 0; background: var(--surface); z-index: 1; }
tr.group td { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; padding-top: 16px; }
tr.total td { font-weight: 600; }
td.calc, td.invoices { color: var(--muted); }
td.invoices { text-decoration: underline dotted; text-underline-offset: 3px; }
td.edit { cursor: text; }
td.edit:hover { background: var(--hover); }
td input { width: 96px; font: inherit; text-align: right; padding: 2px 4px; border: 1px solid var(--ink); border-radius: 3px; background: var(--bg); color: var(--ink); }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }

/* Forms */
label { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }
input, select, textarea {
  font: inherit; font-size: 16px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 9px 10px; width: 100%;
}
textarea { min-height: 64px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--ink); outline-offset: -1px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.check { display: flex; gap: 8px; align-items: center; color: var(--ink); font-size: 14px; }
.check input { width: auto; }

.btn {
  font: inherit; font-size: 14px; cursor: pointer; text-decoration: none; text-align: center;
  padding: 9px 14px; border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--surface); color: var(--ink);
}
.btn:hover { background: var(--hover); }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.primary:hover { opacity: 0.88; }
.btn.danger { color: var(--bad); }
.btn.wide { width: 100%; padding: 12px; }
.btn:disabled { opacity: 0.5; cursor: default; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.seg button { font: inherit; border: 0; background: var(--surface); color: var(--muted); padding: 6px 12px; cursor: pointer; }
.seg button.on { background: var(--ink); color: var(--bg); }

.toast {
  position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: var(--radius);
  max-width: calc(100% - 32px); z-index: 20;
}
.timeline { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }

@media (max-width: 560px) {
  .stats > .stat:last-child:nth-child(odd) { grid-column: 1 / -1; }
  th, td { padding: 7px 8px; }
  .top { flex-direction: column; align-items: flex-start; gap: 6px; }
  .top nav { width: 100%; }
  .stat .value { font-size: 18px; }
}