:root {
  --ink: #1d2433;
  --muted: #5b6577;
  --line: #dfe3ea;
  --canvas: #f3f5f8;
  --paper: #ffffff;
  --side: #17324d;
  --side-ink: #c9d6e3;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --danger: #b42318;
  --danger-bg: #fef3f2;
  --ok-bg: #ecfdf3;
  --radius: 6px;
  --font: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6eaf0; --muted: #9aa5b5; --line: #2c3645; --canvas: #121821; --paper: #19212d;
    --side: #0d1520; --side-ink: #a9b8c8; --accent: #2bb3a3; --accent-ink: #0b1a18;
    --danger: #f97066; --danger-bg: #3a1714; --ok-bg: #0f2e22;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 15px/1.5 var(--font); color: var(--ink); background: var(--canvas); font-variant-numeric: tabular-nums; }
a { color: var(--accent); }
h1 { font-size: 1.5rem; font-weight: 600; margin: 0 0 1.25rem; }
h2 { font-size: 1.05rem; font-weight: 600; margin: 0 0 .75rem; }
.muted { color: var(--muted); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Shell */
.shell { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.side { background: var(--side); color: var(--side-ink); padding: 1rem .75rem; display: flex; flex-direction: column; gap: 1rem; }
.side nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.side nav a { color: var(--side-ink); text-decoration: none; padding: .45rem .7rem; border-radius: var(--radius); }
.side nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.side nav a.on { background: rgba(255,255,255,.12); color: #fff; font-weight: 500; }
.side nav .soon { color: #6f8399; padding: .45rem .7rem; cursor: default; }
.nav-group { margin: 1rem .7rem .25rem; font-size: .8rem; color: #8ea3b8; }
.switcher select { width: 100%; background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.18); }
.switcher option { color: #000; }
.me { border-top: 1px solid rgba(255,255,255,.12); padding: .75rem .7rem 0; display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }
.me a { color: #fff; text-decoration: none; font-weight: 500; }
.me form { width: 100%; }
.main { padding: 1.75rem 2rem; max-width: 1200px; width: 100%; }

/* Forms */
label { display: flex; flex-direction: column; gap: .3rem; font-size: .9rem; font-weight: 500; }
.hint { font-weight: 400; color: var(--muted); font-size: .82rem; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .5rem .65rem; min-width: 0; }
button { font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: var(--radius); padding: .5rem .9rem; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 500; }
button.link { border: 0; background: none; padding: 0; color: var(--side-ink); text-decoration: underline; }
label.check { flex-direction: row; align-items: center; font-weight: 400; gap: .5rem; }
.stack { display: flex; flex-direction: column; gap: .85rem; }
.inline { display: flex; gap: .6rem; align-items: flex-end; flex-wrap: wrap; }
.inline.end { justify-content: flex-end; align-items: center; }
.grow { flex: 1; }
.grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: .85rem; align-items: end; }
.filters { display: flex; flex-wrap: wrap; gap: .6rem; align-items: flex-end; margin-bottom: 1rem; }

/* Surfaces */
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.25rem; margin-bottom: 1.25rem; }
.panel.narrow { max-width: 30rem; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; align-items: start; }
.flash { padding: .6rem .85rem; border-radius: var(--radius); margin-bottom: 1rem; background: var(--ok-bg); border: 1px solid var(--line); }
.flash.err { background: var(--danger-bg); color: var(--danger); }
.badge { font-size: .75rem; padding: .1rem .45rem; border-radius: 99px; background: var(--accent); color: var(--accent-ink); font-weight: 500; }

/* Tables */
table { width: 100%; border-collapse: collapse; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); }
th, td { text-align: left; padding: .55rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 500; color: var(--muted); font-size: .85rem; }
tr:last-child td { border-bottom: 0; }
.right { text-align: right; } .center { text-align: center; } .nowrap { white-space: nowrap; }
.stats { display: flex; gap: 1rem; flex-wrap: wrap; }
.stats div { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1.2rem; min-width: 150px; }
.stats dt { color: var(--muted); font-size: .85rem; } .stats dd { margin: 0; font-size: 1.6rem; font-weight: 600; }
.pager { display: flex; gap: 1rem; align-items: center; margin-top: 1rem; }

/* Audit */
.audit { font-size: .88rem; }
.audit tr.warn td { background: var(--danger-bg); }
.act { font-weight: 500; }
.ok { color: var(--accent); font-weight: 600; } .bad { color: var(--danger); font-weight: 700; }
.diff { display: grid; grid-template-columns: auto 1fr; gap: .2rem .75rem; margin: .5rem 0 0; }
.diff dt { color: var(--muted); } .diff dd { margin: 0; word-break: break-word; }
del { color: var(--danger); margin-right: .4rem; } ins { color: var(--accent); text-decoration: none; }

/* Sign-in */
body.auth { display: grid; place-items: center; min-height: 100vh; padding: 1rem; }
.auth-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; width: 100%; max-width: 24rem; display: flex; flex-direction: column; gap: .9rem; }
.auth-card h1 { margin: 0; }

@media (max-width: 760px) {
  .shell { grid-template-columns: 1fr; }
  .side { flex-direction: row; flex-wrap: wrap; }
  .side nav { flex-direction: row; flex-wrap: wrap; }
  .main { padding: 1.25rem 1rem; }
  table { display: block; overflow-x: auto; }
}

/* ---- Step 3: lists, forms, detail pages ---- */
h3 { font-size: .95rem; font-weight: 600; margin: 1.25rem 0 .6rem; }
a.button { display: inline-block; text-decoration: none; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: var(--radius); padding: .5rem .9rem; }
a.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 500; }
button.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }
button.icon { padding: .35rem .65rem; line-height: 1; font-size: 1.1rem; }
.toolbar { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; margin-bottom: 1rem; }
.toolbar form { margin: 0; }
.spacer { flex: 1; }
.tabs { display: flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.tabs a { padding: .45rem .9rem; text-decoration: none; color: var(--muted); }
.tabs a span { font-size: .8rem; margin-left: .25rem; }
.tabs a.on { background: var(--side); color: #fff; }
.search { display: flex; gap: .4rem; flex: 1; min-width: 240px; max-width: 420px; }
.search input { flex: 1; }
.empty { background: var(--paper); border: 1px dashed var(--line); border-radius: var(--radius); padding: 2.5rem; text-align: center; }
.empty p { margin: 0 0 1rem; }
.form-page { max-width: 820px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem 1rem; }
.span2 { grid-column: 1 / -1; }
.seg { border: 0; padding: 0; margin: 0 0 1rem; display: flex; gap: 1.25rem; flex-wrap: wrap; }
.seg legend { font-weight: 500; font-size: .9rem; margin-bottom: .4rem; padding: 0; }
.seg label { flex-direction: row; align-items: center; gap: .4rem; font-weight: 400; }
.has-err input, .has-err select { border-color: var(--danger); }
.field-err { color: var(--danger); font-size: .82rem; font-weight: 400; }
.custom-fields { display: flex; flex-direction: column; gap: .5rem; margin-bottom: .6rem; }
.cf-row { display: grid; grid-template-columns: 1fr 2fr auto; gap: .5rem; }
.top-gap { margin-top: 1.1rem; }
textarea { width: 100%; resize: vertical; }
.actions { display: flex; gap: 1rem; align-items: center; margin-bottom: 2rem; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: .45rem 1.25rem; margin: 0; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; word-break: break-word; }
.notes { white-space: normal; background: var(--canvas); padding: .75rem; border-radius: var(--radius); }
.stats dd small { font-size: .8rem; font-weight: 400; color: var(--muted); }
.stats .owing dd { color: var(--danger); }
.muted-badge { background: var(--line); color: var(--muted); }
table.plain { border: 0; }
.status { font-size: .78rem; font-weight: 500; padding: .1rem .5rem; border-radius: 4px; background: var(--line); color: var(--ink); }
.status.s-paid { background: #d1fadf; color: #05603a; }
.status.s-sent, .status.s-viewed { background: #d1e9ff; color: #194185; }
.status.s-partial { background: #fef0c7; color: #93370d; }
.status.s-draft { background: #fee4e2; color: #912018; }
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } .cf-row { grid-template-columns: 1fr 1fr auto; } }
[hidden] { display: none !important; }

/* ---- Step 4: invoices ---- */
.small { font-size: .82rem; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: .9rem 1rem; }
.span-all { grid-column: 1 / -1; }
.w-xs { width: 5.5rem; }
.invoice-form { max-width: 1000px; }
.line { display: grid; grid-template-columns: 1fr 6.5rem 9rem 8rem 2.4rem; gap: .5rem; align-items: start; padding: .75rem 0; border-bottom: 1px solid var(--line); }
.line-head { font-size: .82rem; color: var(--muted); font-weight: 500; padding-top: 0; }
.line-main { display: flex; flex-direction: column; gap: .4rem; }
.line-main textarea { min-height: 2.3rem; }
.line-taxes { display: flex; flex-wrap: wrap; gap: .3rem 1rem; align-items: center; }
.line-taxes label.check { gap: .3rem; }
.inline-label { flex-direction: row; align-items: center; gap: .4rem; font-weight: 400; }
.line-rate { display: flex; flex-direction: column; gap: .4rem; }
.small-input { font-size: .82rem; padding: .3rem .5rem; }
.line-amount { padding-top: .55rem; font-weight: 500; }
input.r, .r { text-align: right; }
[data-add-line] { margin-top: .75rem; }
.totals-preview { width: 320px; margin: 1rem 0 0 auto; border: 0; background: none; }
.totals-preview td { border: 0; padding: .3rem .5rem; }
.totals-preview .grand td { border-top: 2px solid var(--ink); font-weight: 600; font-size: 1.05rem; }
tfoot td { font-weight: 500; background: var(--canvas); }
.status.s-overdue { background: #fee4e2; color: #912018; }
.status.s-cancelled { background: var(--line); color: var(--muted); text-decoration: line-through; }
.doc-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 1.25rem; align-items: start; }
.doc-side .panel { padding: 1rem; }
.copy-row { display: flex; gap: .4rem; } .copy-row input { flex: 1; font-size: .8rem; }
.activity { list-style: none; margin: 1rem 0 0; padding: 0; display: flex; flex-direction: column; gap: .7rem; }
.activity li { display: flex; flex-direction: column; border-left: 2px solid var(--line); padding-left: .6rem; }
.act-what { font-weight: 500; } .act-detail { word-break: break-word; }
.small-gap { gap: .4rem; }
details.menu { position: relative; }
details.menu summary { list-style: none; cursor: pointer; }
details.menu summary::-webkit-details-marker { display: none; }
.menu-list { position: absolute; right: 0; top: calc(100% + 4px); z-index: 10; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .35rem; min-width: 180px; display: flex; flex-direction: column; gap: 2px; box-shadow: 0 6px 20px rgba(16,24,40,.12); }
.menu-list form { margin: 0; }
.menu-list button { width: 100%; text-align: left; border: 0; background: none; padding: .45rem .6rem; }
.menu-list button:hover { background: var(--canvas); }
.page-tabs { display: inline-flex; margin-bottom: 1rem; }
section[id] { scroll-margin-top: 1rem; }
body.public { background: var(--canvas); padding: 1.5rem 1rem 3rem; }
.public-bar { max-width: 820px; margin: 0 auto 1rem; display: flex; gap: .6rem; justify-content: flex-end; }
@media (max-width: 900px) { .doc-layout { grid-template-columns: 1fr; } .grid3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) {
  .grid3 { grid-template-columns: 1fr; }
  .line { grid-template-columns: 1fr 1fr; }
  .line-main { grid-column: 1 / -1; }
  .line-head { display: none; }
}
@media print { .side, .toolbar, .doc-side, .public-bar, .flash, h1 { display: none !important; } .main { padding: 0; } .doc-layout { display: block; } }

/* ---- Step 5: payments + dashboard ---- */
.no-margin { margin: 0; }
.text-danger { color: var(--danger); }
.stats .owing-soft dd { color: #b54708; }
.stats .pending dd { color: var(--muted); }
.stats dd a { color: inherit; text-decoration: none; }
.pay-box { margin-top: 1rem; }
.pay-box summary { list-style: none; display: inline-block; cursor: pointer; }
.pay-box summary::-webkit-details-marker { display: none; }
.dash-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 1.25rem; margin-top: 1.25rem; }
.dash-grid .panel { margin: 0; }
.span-dash { grid-column: 1 / -1; }
.chart { width: 100%; height: auto; display: block; margin-top: .5rem; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.bar-0, .lg-0 { fill: #9fb7cf; background: #9fb7cf; }
.bar-1, .lg-1 { fill: var(--accent); background: var(--accent); }
.lg-owe { background: #f79009; }
.bar:hover { opacity: .8; }
.legend { font-size: .82rem; color: var(--muted); display: flex; align-items: center; gap: .35rem; }
.lg { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin: 0 .2rem 0 .5rem; vertical-align: middle; }
.summary .donut { width: 160px; height: 160px; display: block; margin: .5rem auto 1rem; }
.ring-owing { stroke: #f79009; } .ring-paid { stroke: var(--accent); }
.donut-pct { fill: var(--ink); font-size: 24px; font-weight: 600; font-family: var(--font); }
.donut-sub { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.activity li > span:first-child { word-break: break-word; }
@media (max-width: 900px) { .dash-grid { grid-template-columns: 1fr; } }