:root {
  --bg: #f4f2ee;
  --panel: #ffffff;
  --panel-2: #faf8f5;
  --ink: #1d232a;
  --ink-2: #4b5560;
  --ink-3: #7b8590;
  --line: #e4e0d9;
  --line-2: #efebe5;
  --side: #1c232b;
  --side-ink: #c9d0d7;
  --side-active: #2b3540;
  --accent: #c2611f;
  --accent-ink: #ffffff;
  --accent-soft: #fbeee3;
  --good: #2e7d4f;
  --good-soft: #e6f3eb;
  --bad: #c62f2f;
  --bad-soft: #fbe9e9;
  --warn: #a66a00;
  --warn-soft: #fdf3dc;
  --info: #2c62a8;
  --info-soft: #e7eef8;
  --chart-sales: #3d6fb6;
  --chart-paid: #2e8a57;
  --chart-overdue: #d0453a;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(20, 25, 30, .06), 0 4px 16px rgba(20, 25, 30, .05);
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12161b; --panel: #1a2027; --panel-2: #1f262e; --ink: #e8ecf0; --ink-2: #b4bdc6; --ink-3: #87919b;
    --line: #2c353f; --line-2: #252d36; --side: #0e1216; --side-ink: #b9c2cb; --side-active: #222a33;
    --accent: #e07a35; --accent-soft: #3a2616; --good: #5cbf85; --good-soft: #193526; --bad: #ef6b6b; --bad-soft: #3d1e1e;
    --warn: #e2b04a; --warn-soft: #3a2f15; --info: #78a6e6; --info-soft: #1b2a40;
    --chart-sales: #6b9be0; --chart-paid: #5cbf85; --chart-overdue: #ef6b6b; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12161b; --panel: #1a2027; --panel-2: #1f262e; --ink: #e8ecf0; --ink-2: #b4bdc6; --ink-3: #87919b;
  --line: #2c353f; --line-2: #252d36; --side: #0e1216; --side-ink: #b9c2cb; --side-active: #222a33;
  --accent: #e07a35; --accent-soft: #3a2616; --good: #5cbf85; --good-soft: #193526; --bad: #ef6b6b; --bad-soft: #3d1e1e;
  --warn: #e2b04a; --warn-soft: #3a2f15; --info: #78a6e6; --info-soft: #1b2a40;
  --chart-sales: #6b9be0; --chart-paid: #5cbf85; --chart-overdue: #ef6b6b; color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 14px/1.45 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: 22px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; }
.muted { color: var(--ink-3); }
.small { font-size: 12px; }
.num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.nowrap { white-space: nowrap; }
.pre { white-space: pre-line; }
.hidden { display: none !important; }
.grow { flex: 1; min-width: 0; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.spacer { flex: 1; }

/* ---------- layout ---------- */
.app { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }
.side { background: var(--side); color: var(--side-ink); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.brand { display: flex; align-items: center; gap: 10px; padding: 18px 18px 14px; color: #fff; }
.brand-mark { width: 32px; height: 32px; border-radius: 8px; background: var(--accent); display: grid; place-items: center; font-weight: 700; color: #fff; font-size: 16px; }
.brand-name { font-weight: 600; font-size: 15px; line-height: 1.15; }
.brand-name small { display: block; font-weight: 400; color: var(--side-ink); font-size: 11px; opacity: .8; }
.nav { display: flex; flex-direction: column; padding: 6px 10px; gap: 2px; }
.nav a { color: var(--side-ink); padding: 9px 12px; border-radius: 8px; display: flex; align-items: center; gap: 11px; font-size: 14px; }
.nav a:hover { background: var(--side-active); text-decoration: none; color: #fff; }
.nav a.active { background: var(--accent); color: #fff; }
.nav svg { width: 18px; height: 18px; flex: none; opacity: .9; }
.nav-sep { height: 1px; background: rgba(255,255,255,.08); margin: 8px 6px; }
.side-foot { margin-top: auto; padding: 14px 18px; font-size: 12px; color: var(--side-ink); opacity: .8; border-top: 1px solid rgba(255,255,255,.08); }

.main { min-width: 0; display: flex; flex-direction: column; }
.top { display: flex; align-items: center; gap: 12px; padding: 12px 24px; border-bottom: 1px solid var(--line); background: var(--panel); position: sticky; top: 0; z-index: 20; }
.menu-btn { display: none; }
.content { padding: 22px 24px 60px; max-width: 1360px; width: 100%; }
.page-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.page-head .sub { color: var(--ink-3); font-size: 13px; }

/* ---------- timer ---------- */
.timer { display: flex; align-items: center; gap: 8px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px; padding: 4px 6px 4px 4px; }
.timer button { width: 30px; height: 30px; border-radius: 50%; border: 0; background: var(--accent); color: #fff; display: grid; place-items: center; cursor: pointer; }
.timer.running button { background: var(--bad); }
.timer .clock { font: 600 15px var(--mono); min-width: 78px; text-align: center; }
.timer .what { font-size: 12px; color: var(--ink-3); max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.who { font-size: 12px; color: var(--ink-3); text-align: right; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 600; line-height: 18px; white-space: nowrap; }
.b-draft { background: var(--line-2); color: var(--ink-2); }
.b-sent { background: var(--info-soft); color: var(--info); }
.b-paid { background: var(--good-soft); color: var(--good); }
.b-overdue { background: var(--bad-soft); color: var(--bad); }
.b-void { background: var(--line-2); color: var(--ink-3); text-decoration: line-through; }
.b-credit { background: var(--warn-soft); color: var(--warn); }
.b-ro { background: var(--warn-soft); color: var(--warn); }

/* ---------- panels ---------- */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-h { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--line-2); }
.card-b { padding: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.split { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.kpi .k { font-size: 12px; color: var(--ink-3); font-weight: 500; text-transform: uppercase; letter-spacing: .04em; }
.kpi .v { font-size: 21px; font-weight: 600; margin-top: 4px; font-variant-numeric: tabular-nums; }
.kpi .v2 { font-size: 13px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.kpi.bad .v { color: var(--bad); }
.kpi.good .v { color: var(--good); }
.kpi.warn .v { color: var(--warn); }
.kpi.link { cursor: pointer; }
.kpi.link:hover { border-color: var(--accent); }

/* ---------- tables ---------- */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th { text-align: left; font-size: 11.5px; font-weight: 600; color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em; padding: 9px 12px; border-bottom: 1px solid var(--line); background: var(--panel-2); position: sticky; top: 0; }
.tbl td { padding: 10px 12px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.tbl tr.click { cursor: pointer; }
.tbl tr.click:hover td { background: var(--panel-2); }
.tbl tr.sel td { background: var(--accent-soft); }
.tbl .num { text-align: right; }
.tbl tfoot td { font-weight: 600; border-top: 1px solid var(--line); border-bottom: 0; }
.tbl-wrap { overflow-x: auto; }
.empty { padding: 40px 16px; text-align: center; color: var(--ink-3); }

/* ---------- forms ---------- */
label.f { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--ink-2); font-weight: 500; min-width: 0; }
input, select, textarea { font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; min-width: 0; }
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 0; border-color: var(--accent); }
input[type=checkbox] { width: 16px; height: 16px; padding: 0; accent-color: var(--accent); }
textarea { resize: vertical; min-height: 64px; }
.fgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.fgrid .span2 { grid-column: span 2; }
.fgrid .full { grid-column: 1 / -1; }
.check { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); cursor: pointer; }
.search { max-width: 280px; }

.btn { display: inline-flex; align-items: center; gap: 7px; font: 500 13.5px var(--font); padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--ink-3); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.danger { color: var(--bad); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.btn:disabled { opacity: .5; cursor: default; }
.btn svg { width: 16px; height: 16px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--panel); }
.seg button { border: 0; background: transparent; padding: 7px 12px; font: 500 13px var(--font); color: var(--ink-2); cursor: pointer; border-right: 1px solid var(--line); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--accent); color: #fff; }

/* ---------- invoice editor ---------- */
.lines { width: 100%; border-collapse: collapse; }
.lines th { font-size: 11.5px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-3); text-align: left; padding: 6px 6px; border-bottom: 1px solid var(--line); }
.lines td { padding: 6px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.lines input, .lines textarea { padding: 6px 8px; }
.lines textarea { min-height: 38px; font-size: 13px; }
.lines .c-date { width: 128px; }
.lines .c-qty { width: 80px; }
.lines .c-unit { width: 90px; }
.lines .c-rate { width: 110px; }
.lines .c-tax { width: 44px; text-align: center; }
.lines .c-amt { width: 110px; text-align: right; padding-top: 12px; font-variant-numeric: tabular-nums; }
.lines .c-x { width: 34px; }
.section-label { font-weight: 600; font-size: 13px; padding: 14px 6px 4px; color: var(--ink-2); }
.totals { margin-left: auto; min-width: 280px; }
.totals div { display: flex; justify-content: space-between; padding: 5px 0; font-variant-numeric: tabular-nums; }
.totals .grand { font-weight: 700; font-size: 16px; border-top: 1px solid var(--line); margin-top: 4px; padding-top: 9px; }

/* ---------- invoice preview ---------- */
.doc { background: #fff; color: #222; border: 1px solid var(--line); border-radius: 6px; padding: 40px 44px; max-width: 900px; font-size: 13px; }
.doc .muted { color: #777; }

/* ---------- chart ---------- */
.chart { width: 100%; height: 260px; }
.chart text { fill: var(--ink-3); font-size: 11px; font-family: var(--font); }
.chart .grid { stroke: var(--line-2); }
.legend { display: flex; gap: 16px; font-size: 12px; color: var(--ink-2); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }
.tip { position: fixed; pointer-events: none; background: var(--ink); color: var(--panel); padding: 7px 10px; border-radius: 6px; font-size: 12px; z-index: 100; white-space: nowrap; }

/* ---------- dialog ---------- */
dialog { border: 0; border-radius: 12px; padding: 0; background: var(--panel); color: var(--ink); box-shadow: 0 20px 60px rgba(0,0,0,.3); width: min(720px, calc(100vw - 24px)); max-height: calc(100vh - 40px); }
dialog::backdrop { background: rgba(15, 20, 25, .45); }
dialog .dh { padding: 16px 20px; border-bottom: 1px solid var(--line-2); display: flex; align-items: center; gap: 10px; }
dialog .db { padding: 18px 20px; overflow-y: auto; max-height: calc(100vh - 200px); }
dialog .df { padding: 14px 20px; border-top: 1px solid var(--line-2); display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
dialog.wide { width: min(1000px, calc(100vw - 24px)); }

.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--panel); padding: 10px 18px; border-radius: 8px; z-index: 200; box-shadow: var(--shadow); font-size: 13.5px; }
.toast.err { background: var(--bad); color: #fff; }
.activity { list-style: none; padding: 0; margin: 0; }
.activity li { padding: 9px 16px; border-bottom: 1px solid var(--line-2); font-size: 13px; }
.activity li:last-child { border-bottom: 0; }
.activity .when { font-size: 11.5px; color: var(--ink-3); }
.pill-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.pill-tabs button { border: 1px solid var(--line); background: var(--panel); border-radius: 999px; padding: 5px 12px; font: 500 12.5px var(--font); color: var(--ink-2); cursor: pointer; }
.pill-tabs button.on { background: var(--ink); color: var(--panel); border-color: var(--ink); }
.dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; font-size: 13px; }
.dl dt { color: var(--ink-3); }
.dl dd { margin: 0; }
.notice { background: var(--warn-soft); color: var(--warn); border-radius: 8px; padding: 10px 14px; font-size: 13px; }
.notice.info { background: var(--info-soft); color: var(--info); }
.bar { height: 8px; background: var(--line-2); border-radius: 4px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); }

/* read-only users never see write controls */
body.readonly .w { display: none !important; }

/* ---------- mobile ---------- */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .side { position: fixed; left: 0; top: 0; bottom: 0; width: 248px; z-index: 50; transform: translateX(-100%); transition: transform .2s; }
  body.nav-open .side { transform: none; }
  body.nav-open::after { content: ""; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 40; }
  .menu-btn { display: inline-flex; }
  .top { padding: 10px 16px; }
  .content { padding: 16px 16px 80px; }
  .grid2, .grid3, .split { grid-template-columns: 1fr; }
  .kpis { grid-template-columns: 1fr 1fr; gap: 10px; }
  .kpi { padding: 12px; }
  .card-h .muted.small { display: none; }
  .page-head h1 { font-size: 19px; }
  .timer .what, .who { display: none; }
  .fgrid .span2 { grid-column: auto; }
  .kpi .v { font-size: 18px; }
  .hide-m { display: none; }
  .lines thead { display: none; }
  .lines tr { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; padding: 10px 0; border-bottom: 1px solid var(--line); }
  .lines td { border: 0; padding: 0; width: auto !important; }
  .lines td.c-name, .lines td.c-desc { grid-column: 1 / -1; }
  .doc { padding: 20px 16px; }
}