/* Tallyard — a purchasing ledger, not a SaaS template.
   Palette: cool paper ground, ledger-blue accent, madder for overdue, moss for good, ochre for warnings.
   Type: Newsreader for the wordmark and page titles, IBM Plex Sans for UI, IBM Plex Mono for every figure and identifier. */
:root {
  --ground: #eef0f3; --surface: #ffffff; --surface-2: #f6f7f9; --ink: #14181f; --muted: #5b6472;
  --line: #d8dce3; --rule: #cfd8e6; --accent: #2b4c7e; --accent-ink: #ffffff; --accent-tint: #e4ebf5;
  --madder: #9a3c3c; --madder-tint: #f6e6e6; --moss: #3c7a4e; --moss-tint: #e4f0e7; --ochre: #b8862b; --ochre-tint: #f7efdc;
  --rail: #1f2a3a; --rail-ink: #dfe5ee; --rail-muted: #93a0b3; --focus: #e8b04a;
  --shadow: 0 1px 2px rgba(20,24,31,.06), 0 6px 20px rgba(20,24,31,.06);
  --font-ui: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #12151a; --surface: #1a1e25; --surface-2: #20252d; --ink: #e8e9ec; --muted: #9aa3b2;
    --line: #2a303a; --rule: #2f3c50; --accent: #7fa3d8; --accent-ink: #0f1622; --accent-tint: #1e2a3d;
    --madder: #d97a7a; --madder-tint: #3a2323; --moss: #7fc39a; --moss-tint: #1f3327; --ochre: #d9b45c; --ochre-tint: #3a3220;
    --rail: #0d1117; --rail-ink: #dfe5ee; --rail-muted: #7f8ba0; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 20px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ground: #12151a; --surface: #1a1e25; --surface-2: #20252d; --ink: #e8e9ec; --muted: #9aa3b2;
  --line: #2a303a; --rule: #2f3c50; --accent: #7fa3d8; --accent-ink: #0f1622; --accent-tint: #1e2a3d;
  --madder: #d97a7a; --madder-tint: #3a2323; --moss: #7fc39a; --moss-tint: #1f3327; --ochre: #d9b45c; --ochre-tint: #3a3220;
  --rail: #0d1117; --rail-ink: #dfe5ee; --rail-muted: #7f8ba0; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 20px rgba(0,0,0,.35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 15px/1.5 var(--font-ui); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
h1 { font: 500 34px/1.1 var(--font-display); letter-spacing: -.01em; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
h2 { font: 600 13px/1.3 var(--font-ui); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; }
h2 .more { margin-left: auto; text-transform: none; letter-spacing: 0; font-weight: 500; }
h2.mt { margin-top: 22px; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.dim, .muted { color: var(--muted); }
.dim { font-size: 13px; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.count { font: 500 13px var(--font-mono); background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: 1px 9px; color: var(--muted); }
.count.warn { color: var(--ochre); border-color: var(--ochre); } .count.ok { color: var(--moss); border-color: var(--moss); } .count.crit { color: var(--madder); border-color: var(--madder); }
.empty { color: var(--muted); font-style: italic; margin: 6px 0; }
.eyebrow { margin: 0 0 4px; font: 500 12px var(--font-ui); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.sub { margin: 6px 0 0; color: var(--muted); }
.hint { font-weight: 400; color: var(--muted); font-size: 12px; }

/* shell */
.shell { display: grid; grid-template-columns: 224px 1fr; min-height: 100vh; }
.rail { background: var(--rail); color: var(--rail-ink); padding: 22px 16px; display: flex; flex-direction: column; gap: 22px; position: sticky; top: 0; height: 100vh; }
.wordmark { display: flex; align-items: center; gap: 10px; color: var(--rail-ink); font: 500 24px var(--font-display); letter-spacing: .005em; }
.wordmark:hover { text-decoration: none; }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a { color: var(--rail-muted); padding: 8px 10px; border-radius: 6px; font-weight: 500; }
.nav a:hover { color: var(--rail-ink); background: rgba(255,255,255,.06); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--rail-ink); background: rgba(255,255,255,.1); box-shadow: inset 3px 0 0 var(--focus); }
.rail-foot { margin-top: auto; display: flex; flex-direction: column; gap: 14px; }
.buyer { font-size: 12px; color: var(--rail-muted); display: flex; flex-direction: column; gap: 2px; }
.buyer strong { color: var(--rail-ink); font-weight: 500; }
.buyer span { font-family: var(--font-mono); font-size: 11px; }
.main { padding: 28px 32px 60px; min-width: 0; max-width: 1240px; width: 100%; }
.pagehead { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.actions form.inline { display: inline; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); font: 500 14px var(--font-ui); cursor: pointer; line-height: 1.2; }
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-danger { color: var(--madder); border-color: var(--madder); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--ink); border-color: var(--line); }
.btn-copilot { background: transparent; border-color: rgba(255,255,255,.18); color: var(--rail-ink); justify-content: center; }
.btn-copilot:hover { border-color: var(--focus); }

/* tiles */
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; display: flex; flex-direction: column; gap: 4px; box-shadow: var(--shadow); border-top: 3px solid var(--accent); }
.tile-warn { border-top-color: var(--ochre); } .tile-crit { border-top-color: var(--madder); }
.tile-label { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.tile-value { font: 500 30px/1.1 var(--font-mono); font-variant-numeric: tabular-nums; }
.tile-sub { font-size: 13px; color: var(--muted); }

/* cards & grids */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin-bottom: 18px; min-width: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 > .card, .grid-3 > .card { margin-bottom: 18px; }

/* ledger tables: ruled rows, figures in mono */
.tablewrap { overflow-x: auto; }
.ledger { width: 100%; border-collapse: collapse; font-size: 14px; }
.ledger th { text-align: left; font: 600 11px var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 6px 10px; border-bottom: 1px solid var(--ink); }
.ledger th.num { text-align: right; }
.ledger td { padding: 9px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.ledger tbody tr:hover td { background: var(--surface-2); }
.ledger tfoot td { border-bottom: 0; padding-top: 6px; padding-bottom: 4px; color: var(--muted); }
.ledger tfoot .grand td { color: var(--ink); font-weight: 600; border-top: 2px solid var(--ink); }
.ledger.compact td { padding: 6px 8px; }
.ledger td.ok { color: var(--moss); } .ledger td.part { color: var(--ochre); }
tr.is-overdue td:first-child { box-shadow: inset 3px 0 0 var(--madder); }
.flag-overdue { font: 600 10px var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--madder); background: var(--madder-tint); padding: 2px 6px; border-radius: 4px; margin-left: 6px; vertical-align: middle; }

/* chips */
.chip { display: inline-block; font: 500 12px var(--font-ui); padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface-2); color: var(--muted); white-space: nowrap; vertical-align: middle; }
.chip-draft { border-style: dashed; }
.chip-issued, .chip-acknowledged, .chip-active { color: var(--accent); background: var(--accent-tint); border-color: transparent; }
.chip-partially_received, .chip-on_hold, .chip-prospect { color: var(--ochre); background: var(--ochre-tint); border-color: transparent; }
.chip-received, .chip-closed { color: var(--moss); background: var(--moss-tint); border-color: transparent; }
.chip-cancelled, .chip-retired { color: var(--madder); background: var(--madder-tint); border-color: transparent; text-decoration: line-through; }

/* accounts */
.auth-wrap { display: grid; place-items: center; min-height: 70vh; padding: 20px 0; }
.card.auth { max-width: 440px; width: 100%; display: flex; flex-direction: column; gap: 12px; }
.card.auth h1 { font-size: 30px; }
.demo-logins { font-size: 13px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.demo-logins ul { margin: 6px 0 0; padding-left: 18px; }
.whoami { font-size: 12px; color: var(--rail-muted); display: flex; flex-direction: column; gap: 2px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,.1); }
.whoami strong { color: var(--rail-ink); font-weight: 500; }
.linkbtn { background: none; border: 0; padding: 0; color: var(--focus); font: inherit; cursor: pointer; text-decoration: underline; }
.inline, .inline-form { display: inline; }
.inline-form select { padding: 4px 6px; font-size: 13px; }
.invite-link { margin-top: 6px; word-break: break-all; font-size: 13px; }
.mail-preview { margin-top: 8px; } .mail-preview pre { background: var(--surface-2); color: var(--ink); border: 1px solid var(--line); padding: 10px 12px; border-radius: 6px; font: 12.5px/1.5 var(--font-mono); overflow-x: auto; white-space: pre-wrap; }
.confirm-card { text-align: center; } .big-mark { font: 500 44px var(--font-display); color: var(--moss); }
body.signed-out .rail .nav, body.signed-out .rail-foot .btn-copilot { display: none; }

/* status legend */
.legend { margin: 0 0 14px; font-size: 14px; }
.legend summary { cursor: pointer; font-weight: 500; color: var(--accent); }
.legend-note { margin: 8px 0 10px; color: var(--muted); max-width: 70ch; }
.legend ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 6px 18px; }
.legend li { display: flex; gap: 10px; align-items: baseline; }
.legend li .chip { flex: 0 0 auto; min-width: 128px; text-align: center; }
.legend li span:last-child { color: var(--muted); }
.status-help { max-width: 78ch; }

/* chart */
.chart { width: 100%; height: auto; display: block; }
.chart .bar { fill: var(--accent); opacity: .75; } .chart .bar-now { opacity: 1; }
.chart .axis { font: 10px var(--font-mono); fill: var(--muted); }
.chart .val { font: 10px var(--font-mono); fill: var(--ink); }
.chart .baseline { stroke: var(--ink); stroke-width: 1; }
.spark { height: 3px; background: var(--accent); width: var(--w); opacity: .6; margin-top: 4px; border-radius: 2px; }

/* flags & alerts */
.flags { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.flag { padding: 8px 10px 8px 12px; border-radius: 6px; background: var(--surface-2); border-left: 3px solid var(--ochre); font-size: 14px; }
.flag-critical { border-left-color: var(--madder); }
.flag-kind { font: 600 10px var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-right: 8px; }
.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 14px; border: 1px solid; font-size: 14px; }
.alert-error, .alert-critical { background: var(--madder-tint); border-color: var(--madder); color: var(--ink); }
.alert-warn { background: var(--ochre-tint); border-color: var(--ochre); }
.alert-ok { background: var(--moss-tint); border-color: var(--moss); }

/* filters */
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.filters-total { margin-left: auto; color: var(--muted); }
input, select, textarea { font: 14px var(--font-ui); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; min-width: 0; }
input.mono, textarea.mono { font-family: var(--font-mono); }
input.num { text-align: right; font-family: var(--font-mono); }
input[aria-invalid="true"] { border-color: var(--madder); }
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-tint); }
input[type="search"] { min-width: 240px; }

/* forms */
.form fieldset { border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px 18px; margin: 0 0 16px; background: var(--surface); display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; }
.form legend { font: 600 12px var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 0 6px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 13px; font-weight: 500; }
.field.span2 { grid-column: 1 / -1; }
.form-actions { display: flex; gap: 8px; align-items: center; }
.form fieldset.lines-set { grid-template-columns: 1fr; }
.lines input, .lines select { width: 100%; padding: 6px 8px; }
.lines td { padding: 4px 4px; }
.lines .ln { color: var(--muted); padding-top: 12px; }
.lines .amount { padding-top: 12px; }
.lines { min-width: 760px; } .lines td:nth-child(2) { min-width: 240px; } .lines td:nth-child(3) { width: 100px; } .lines td:nth-child(4), .lines td:nth-child(6) { width: 120px; } .lines td:nth-child(5), .lines td:nth-child(7) { width: 90px; } .lines td:nth-child(8) { width: 120px; }
.receive .field { margin-bottom: 8px; }
.receive input[type="number"] { width: 110px; }
.note { margin: 12px 0 0; font-size: 14px; }

/* key-value & metrics */
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 0; font-size: 14px; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; }
.metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 16px; margin: 0; }
.metrics > div { display: flex; flex-direction: column; }
.metrics dt { font-size: 12px; color: var(--muted); }
.metrics dd { margin: 0; font: 500 24px/1.1 var(--font-mono); font-variant-numeric: tabular-nums; }
.metrics small { font-size: 11px; color: var(--muted); }
.checklist { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.check { display: flex; align-items: center; gap: 8px; }
.check .req { font: 500 10px var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.checklist .btn { align-self: flex-start; margin-top: 6px; }
.status-form { margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--rule); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 14px; }
.status-form .hint { flex-basis: 100%; margin: 0; }

/* timeline */
.timeline { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.timeline li { display: grid; grid-template-columns: 150px 130px 1fr; gap: 12px; align-items: baseline; padding: 4px 0; border-bottom: 1px dotted var(--rule); }
.timeline time { color: var(--muted); font-size: 12px; }
.timeline .kind { font: 500 11px var(--font-mono); color: var(--accent); }
.timeline.long { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 18px; }

/* copilot drawer */
.drawer { position: fixed; top: 0; right: 0; height: 100vh; width: min(460px, 100%); background: var(--surface); border-left: 1px solid var(--line); box-shadow: var(--shadow); z-index: 30; display: flex; flex-direction: column; gap: 12px; padding: 20px 22px; overflow-y: auto; }
.drawer-head { display: flex; justify-content: space-between; align-items: flex-start; }
.drawer-head h2 { font: 500 26px var(--font-display); text-transform: none; letter-spacing: 0; color: var(--ink); margin: 0 0 4px; }
.drawer-note { margin: 0; font-size: 13px; color: var(--muted); }
.badge { display: inline-block; font: 500 12px var(--font-mono); padding: 2px 8px; border-radius: 4px; border: 1px solid var(--line); background: var(--surface-2); color: var(--muted); }
.badge-provider { color: var(--accent); border-color: var(--accent); }
.drawer-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); }
.tab { background: transparent; border: 0; padding: 8px 10px; font: 500 13px var(--font-ui); color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.drawer-pane { display: flex; flex-direction: column; gap: 10px; }
.drawer-pane label { font-size: 13px; font-weight: 500; }
.drawer-pane .row { display: flex; gap: 8px; flex-wrap: wrap; }
.copilot-out { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; background: var(--surface-2); font-size: 14px; display: flex; flex-direction: column; gap: 8px; }
.copilot-out .kv { font-size: 13px; }
.copilot-out .issue { color: var(--madder); font-size: 13px; }
.copilot-out .provider-line { font-size: 12px; color: var(--muted); }
.scrim { position: fixed; inset: 0; background: rgba(15,22,34,.35); z-index: 20; }

/* printable document */
.doc-body { background: var(--ground); padding: 24px 16px 48px; }
.doc-nav { max-width: 860px; margin: 0 auto 14px; display: flex; justify-content: space-between; align-items: center; }
.document { max-width: 860px; margin: 0 auto; background: var(--surface); border: 1px solid var(--line); padding: 40px 48px; font-size: 14px; }
.doc-head { display: flex; justify-content: space-between; align-items: flex-start; border-bottom: 2px solid var(--ink); padding-bottom: 14px; margin-bottom: 20px; }
.doc-head h1 { font: 500 30px var(--font-display); }
.doc-number { font-size: 20px; margin: 4px 0 0; }
.doc-status { text-align: right; font-weight: 600; }
.doc-parties { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 20px; line-height: 1.55; }
.doc-parties h2 { margin-bottom: 6px; }
.doc-terms { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 16px; padding: 12px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin-bottom: 16px; }
.doc-terms span { display: block; font: 600 11px var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 2px; }
.doc-words { margin: 14px 0 4px; }
.doc-notes { margin: 4px 0; }
.doc-foot { display: grid; grid-template-columns: 1fr 240px; gap: 24px; margin-top: 40px; padding-top: 14px; border-top: 1px solid var(--rule); font-size: 12px; color: var(--muted); }
.doc-foot .sign { color: var(--ink); text-align: right; }
@media print {
  .doc-nav, .rail, .drawer, .scrim { display: none !important; }
  .doc-body { background: #fff; padding: 0; }
  .document { border: 0; padding: 0; max-width: none; }
  body { color: #000; }
}

/* responsive */
@media (max-width: 1080px) { .tiles { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .rail { position: static; height: auto; padding: 14px 16px; gap: 12px; min-width: 0; }
  .nav { min-width: 0; }
  .nav { flex-direction: row; overflow-x: auto; gap: 4px; }
  .nav a { white-space: nowrap; padding: 6px 10px; }
  .nav a[aria-current="page"] { box-shadow: inset 0 -3px 0 var(--focus); }
  .rail-foot { flex-direction: row; align-items: center; justify-content: space-between; margin-top: 0; }
  .buyer { display: none; }
  .main { padding: 20px 16px 48px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .form fieldset { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 2px; }
  .document { padding: 24px 18px; }
  .doc-parties, .doc-terms, .doc-foot { grid-template-columns: 1fr; }
  h1 { font-size: 28px; }
}
@media (max-width: 520px) { .tiles { grid-template-columns: 1fr; } .metrics { grid-template-columns: 1fr 1fr; } }
@media (prefers-reduced-motion: no-preference) { .btn, .nav a, .tab { transition: background-color .12s, border-color .12s, color .12s; } }