:root {
  --bg: #f6f1e7;
  --surface: #fffdf8;
  --surface-2: #efe7d6;
  --text: #1f1d1a;
  --muted: #6b645a;
  --border: #ddd2bd;
  --ink: #1b2a6b;
  --ink-text: #ffffff;
  --ok: #1e7a46;
  --ok-bg: #e3f3e8;
  --warn: #8a5a00;
  --warn-bg: #fdf0d2;
  --bad: #a3231b;
  --bad-bg: #fbe3e0;
  --info: #24548f;
  --info-bg: #e2ecf8;
  --radius: 12px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 4px 16px rgb(0 0 0 / 0.04);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15161b; --surface: #1e2027; --surface-2: #272a33; --text: #ece8df; --muted: #a39d92; --border: #353844;
    --ink: #8da2ff; --ink-text: #10132a; --ok: #6fd39a; --ok-bg: #173325; --warn: #f0c060; --warn-bg: #3a2e14;
    --bad: #ff8f84; --bad-bg: #3d1c1a; --info: #8db9f0; --info-bg: #182a40;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #15161b; --surface: #1e2027; --surface-2: #272a33; --text: #ece8df; --muted: #a39d92; --border: #353844;
  --ink: #8da2ff; --ink-text: #10132a; --ok: #6fd39a; --ok-bg: #173325; --warn: #f0c060; --warn-bg: #3a2e14;
  --bad: #ff8f84; --bad-bg: #3d1c1a; --info: #8db9f0; --info-bg: #182a40;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 "Leelawadee UI", "Noto Sans Thai", "Sarabun", system-ui, -apple-system, "Segoe UI", sans-serif;
}
#app { margin: 0 auto; max-width: 1180px; padding: 0 16px 48px; }

h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.02rem; margin-top: 1.2em; }
a { color: var(--ink); }
hr { border: 0; border-top: 1px solid var(--border); margin: 16px 0; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 20px 0 8px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { margin: 0; }
.tagline { margin: 0; color: var(--muted); font-size: 0.92rem; }
.controls { display: flex; gap: 8px; align-items: center; }
.controls select { width: auto; padding: 5px 8px; }
.lang { display: flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; flex-shrink: 0; }
.lang button { border: 0; border-radius: 0; background: transparent; color: var(--text); padding: 6px 12px; }
.lang button[aria-pressed="true"] { background: var(--ink); color: var(--ink-text); }

.privacy { margin: 0 0 12px; color: var(--muted); font-size: 0.88rem; }
.privacy p { margin: 0 0 2px; }
.backup-line.stale #backup-age { color: var(--warn); font-weight: 600; }
.backup-line button.link { padding: 0 4px; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; scrollbar-width: none; }
.tabs button {
  background: none; border: 0; border-bottom: 3px solid transparent; border-radius: 0;
  color: var(--muted); padding: 10px 14px; font-weight: 600; white-space: nowrap;
}
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--ink); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin-bottom: 16px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 16px; margin-bottom: 16px; }
.grid2 .card { margin-bottom: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

label { display: block; margin-bottom: 12px; font-size: 0.92rem; }
label > span:first-child { display: block; margin-bottom: 4px; color: var(--muted); }
label.check, label.inline { display: flex; align-items: center; gap: 8px; margin: 0; }
label.check > span, label.inline > span:first-child { display: inline; margin: 0; color: var(--text); }
input, select, textarea, button { font: inherit; }
input:not([type]), input[type="number"], input[type="date"], input[type="search"], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); min-width: 0;
}
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--ink); flex-shrink: 0; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

button, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: 8px; border: 1px solid var(--ink);
  background: var(--ink); color: var(--ink-text); font-weight: 600; cursor: pointer; text-decoration: none; margin: 0;
}
button.secondary, .button.secondary { background: transparent; color: var(--ink); }
button.danger { background: transparent; color: var(--bad); border-color: var(--bad); }
button.link { background: none; border: 0; color: var(--muted); text-decoration: underline; padding: 8px 4px; font-weight: 400; }
button.small { padding: 3px 10px; font-size: 0.82rem; }
.file-btn input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.file-btn > span:first-child { display: inline; margin: 0; color: inherit; }
.file-btn:focus-within { outline: 2px solid var(--ink); outline-offset: 2px; }

.row { display: flex; gap: 8px; align-items: center; }
.row > label { flex: 1; }
.row.wrap { flex-wrap: wrap; margin-top: 12px; }
.spacer { flex: 1; }
.msg { min-height: 1.4em; margin: 6px 0 0; font-size: 0.92rem; }
.msg.error { color: var(--bad); }
.msg.ok { color: var(--ok); }
.msg.warn { color: var(--warn); }
.banner { padding: 12px 16px; border-radius: var(--radius); font-size: 0.92rem; }
.banner.warn { background: var(--warn-bg); color: var(--warn); }

/* queue */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; }
.stat .v { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .k { color: var(--muted); font-size: 0.85rem; }
.stat.bad .v { color: var(--bad); }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.toolbar input[type="search"] { flex: 1; min-width: 160px; width: auto; }
.seg { display: inline-flex; border: 1px solid var(--ink); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; background: transparent; color: var(--ink); padding: 7px 12px; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--ink-text); }

.board { display: grid; grid-template-columns: repeat(var(--cols, 4), minmax(220px, 1fr)); gap: 12px; overflow-x: auto; padding-bottom: 8px; }
.col { background: var(--surface-2); border-radius: var(--radius); padding: 10px; min-height: 120px; }
.col h3 { margin: 0 0 8px; font-size: 0.95rem; display: flex; justify-content: space-between; }
.col h3 .count { color: var(--muted); font-weight: 400; }
.job { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--border); border-radius: 10px; padding: 10px 12px; margin-bottom: 8px; cursor: pointer; box-shadow: var(--shadow); }
.job:hover { border-color: var(--ink); }
.job.overdue { border-left-color: var(--bad); background: var(--bad-bg); }
.job.soon { border-left-color: var(--warn); }
.job .name { font-weight: 700; }
.job .what { color: var(--muted); font-size: 0.88rem; }
.job .meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-top: 6px; font-size: 0.82rem; }
.job .actions { display: flex; gap: 6px; margin-top: 8px; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.badge.unpaid { background: var(--bad-bg); color: var(--bad); }
.badge.deposit { background: var(--warn-bg); color: var(--warn); }
.badge.paid { background: var(--ok-bg); color: var(--ok); }
.badge.late { background: var(--bad); color: #fff; }
.badge.soon { background: var(--warn-bg); color: var(--warn); }
.price { font-weight: 700; font-variant-numeric: tabular-nums; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.overdue td { background: var(--bad-bg); }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: var(--surface-2); }
.empty { padding: 32px 16px; text-align: center; color: var(--muted); border: 2px dashed var(--border); border-radius: var(--radius); }

/* calculator & price list */
.lines { width: 100%; margin: 8px 0; }
.lines td { border: 0; padding: 4px 0; }
.total-row { display: flex; justify-content: space-between; align-items: baseline; border-top: 2px solid var(--text); padding-top: 8px; margin-top: 8px; }
.total-row .price { font-size: 1.8rem; color: var(--ink); }
.pl-table input { padding: 5px 8px; }
.pl-table td { padding: 4px 6px; }
.pl-table td.num input { text-align: right; max-width: 110px; }
.pl-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 12px; margin-top: 16px; }

/* editor dialog */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 20px; width: min(720px, calc(100vw - 24px)); max-height: calc(100dvh - 24px); }
dialog::backdrop { background: rgb(0 0 0 / 0.45); }
.grid-form { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.grid-form .wide { grid-column: 1 / -1; }

/* document view */
#doc-view { position: fixed; inset: 0; background: var(--bg); overflow: auto; z-index: 10; padding: 0 16px 32px; }
.doc-toolbar { position: sticky; top: 0; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding: 12px 0; background: var(--bg); max-width: 820px; margin: 0 auto; }
.doc-toolbar select { width: auto; }
.sheet {
  max-width: 820px; margin: 0 auto; background: #fff; color: #1f1d1a; padding: 40px 44px; border-radius: 4px;
  box-shadow: 0 2px 20px rgb(0 0 0 / 0.15); font-size: 15px; line-height: 1.55;
}
.sheet .head { display: flex; justify-content: space-between; gap: 24px; border-bottom: 3px solid #1b2a6b; padding-bottom: 14px; margin-bottom: 18px; }
.sheet .head h1 { color: #1b2a6b; font-size: 1.7rem; margin: 0; }
.sheet .from strong { font-size: 1.1rem; }
.sheet .meta { text-align: right; }
.sheet .muted { color: #6b645a; }
.sheet .parties { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 18px; }
.sheet table th { color: #6b645a; border-bottom: 2px solid #1f1d1a; }
.sheet table td { border-bottom: 1px solid #e3dccd; }
.sheet .sum td { border: 0; padding: 3px 10px; }
.sheet .sum .grand td { font-weight: 700; font-size: 1.1rem; border-top: 2px solid #1f1d1a; }
.sheet .words { text-align: right; color: #6b645a; font-size: 0.9rem; margin: 4px 10px 0; }
.sheet .pay { display: flex; gap: 20px; align-items: center; margin-top: 24px; padding: 16px; border: 1px solid #ddd2bd; border-radius: 10px; break-inside: avoid; }
.sheet .pay svg { width: 168px; height: 168px; flex-shrink: 0; }
.sheet .pay .amt { font-size: 1.4rem; font-weight: 700; color: #1b2a6b; }
.sheet .stamp { margin-top: 20px; padding: 10px 14px; border: 2px solid #1e7a46; color: #1e7a46; border-radius: 8px; display: inline-block; font-weight: 700; }
.sheet .notes { margin-top: 18px; white-space: pre-wrap; font-size: 0.9rem; }
.sheet .foot { margin-top: 28px; border-top: 1px solid #e3dccd; padding-top: 8px; color: #6b645a; font-size: 0.8rem; text-align: center; }

footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.85rem; }
footer p { margin: 0 0 4px; }

@media (max-width: 640px) {
  #app { padding: 0 12px 40px; }
  h1 { font-size: 1.35rem; }
  .tabs button { padding: 10px 10px; font-size: 0.92rem; }
  .stat .v { font-size: 1.1rem; }
  .board { grid-template-columns: 1fr; overflow: visible; }
  .grid-form { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  .sheet { padding: 20px 16px; font-size: 13px; }
  .sheet .head, .sheet .pay { flex-direction: column; align-items: flex-start; }
  .sheet .meta { text-align: left; }
  .sheet .parties { grid-template-columns: 1fr; }
  .hide-sm { display: none; }
}

@media print {
  @page { size: A4; margin: 12mm; }
  html, body { background: #fff !important; }
  #app, dialog, .doc-toolbar { display: none !important; }
  #doc-view { position: static; padding: 0; background: #fff; overflow: visible; }
  .sheet { box-shadow: none; padding: 0; max-width: none; }
}

[hidden] { display: none !important; }