:root {
  --brand: #1f3fa8;
  --brand-ink: #fff;
  --bg: #f4f6fa;
  --card: #fff;
  --ink: #1d2433;
  --muted: #667085;
  --line: #dde2ea;
  --ok: #157f3b;
  --warn: #b54708;
  --bad: #b42318;
  font-family: "Sarabun", "Leelawadee UI", "Tahoma", sans-serif;
  font-size: 15px;
  color: var(--ink);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; } /* กัน display:flex ของ label/.row ทับ attribute hidden */
body { margin: 0; background: var(--bg); }
a { color: var(--brand); }

.topbar { display: flex; align-items: center; gap: 16px; padding: 8px 16px; background: var(--brand); color: var(--brand-ink); flex-wrap: wrap; position: sticky; top: 0; z-index: 10; }
.topbar a { color: var(--brand-ink); text-decoration: none; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.brand img { height: 30px; background: #fff; border-radius: 4px; padding: 2px; }
#nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
#nav > a, .menu summary { padding: 6px 10px; border-radius: 6px; cursor: pointer; list-style: none; }
#nav > a:hover, .menu summary:hover { background: rgba(255,255,255,.15); }
.menu { position: relative; }
.menu .dd { position: absolute; top: 100%; left: 0; background: var(--brand); border-radius: 0 0 8px 8px; padding: 4px 0; box-shadow: 0 8px 20px rgba(0,0,0,.2); min-width: 200px; }
.menu .dd a { display: block; padding: 8px 14px; white-space: nowrap; }
.menu .dd a:hover { background: rgba(255,255,255,.15); }
.who { font-size: 13px; }
button.link { background: none; border: 0; color: inherit; text-decoration: underline; cursor: pointer; font: inherit; }

main { max-width: 1200px; margin: 0 auto; padding: 16px; }
h1 { font-size: 22px; margin: 4px 0 16px; }
h2 { font-size: 17px; margin: 20px 0 8px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > label { flex: 1 1 180px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
input, select, textarea { font: inherit; color: var(--ink); padding: 7px 9px; border: 1px solid var(--line); border-radius: 6px; background: #fff; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid #8da2e6; border-color: var(--brand); }
input[readonly], input:disabled, select:disabled, textarea:disabled { background: #f2f4f7; }
button, .btn { font: inherit; padding: 7px 14px; border-radius: 6px; border: 1px solid var(--line); background: #fff; color: var(--ink); cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .btn.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
button.danger { color: var(--bad); border-color: #f1b8b3; }
button:disabled { opacity: .5; cursor: default; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.spacer { flex: 1; }

table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 7px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; background: #f8f9fb; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.click { cursor: pointer; }
tr.click:hover td { background: #f5f7ff; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
.lines td { padding: 4px; }
.lines input, .lines select { padding: 5px 6px; }
.lines .w-qty { width: 90px; } .lines .w-unit { width: 80px; } .lines .w-money { width: 120px; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: 12px; border: 1px solid; }
.badge.draft { color: var(--warn); border-color: #fedf89; background: #fffaeb; }
.badge.issued { color: var(--ok); border-color: #abefc6; background: #ecfdf3; }
.badge.void { color: var(--bad); border-color: #fecdca; background: #fef3f2; }

.totals { margin-left: auto; width: min(360px, 100%); }
.totals div { display: flex; justify-content: space-between; padding: 4px 0; }
.totals .grand { font-weight: 700; font-size: 17px; border-top: 2px solid var(--ink); }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.kpi b { display: block; font-size: 22px; margin-top: 4px; }
.muted { color: var(--muted); font-size: 13px; }
.alert { padding: 10px 12px; border-radius: 8px; background: #fffaeb; border: 1px solid #fedf89; color: #7a2e0e; margin-bottom: 12px; }

.auth { max-width: 380px; margin: 60px auto; }
.auth img { display: block; height: 80px; margin: 0 auto 12px; }

#toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #1d2433; color: #fff; padding: 10px 18px; border-radius: 8px; z-index: 50; max-width: 90vw; }
#toast.err { background: var(--bad); }

@media (max-width: 640px) {
  main { padding: 12px; }
  .topbar { gap: 8px; }
}

/* ---- v0.4 ---- */
.bad { color: var(--bad); }
.warn { color: var(--warn); }
.ok { color: var(--ok); }
.nowrap { white-space: nowrap; }
.alert.info { background: #eff4ff; border-color: #c7d7fe; color: #1d3a8a; }
.alert.ok { background: #ecfdf3; border-color: #abefc6; color: var(--ok); }
tr.off td { opacity: .45; }
label.btn { display: inline-flex; flex-direction: row; color: var(--ink); font-size: 15px; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 12px; }
.tabs a { padding: 7px 12px; border-radius: 8px; text-decoration: none; background: #fff; border: 1px solid var(--line); color: var(--ink); }
.tabs a.on { background: var(--brand); color: #fff; border-color: var(--brand); }
.files { margin: 0 0 12px; padding-left: 18px; }
.files li { margin: 4px 0; }
dialog { border: 0; border-radius: 12px; padding: 0; width: min(560px, 94vw); box-shadow: 0 20px 60px rgba(0,0,0,.3); }
dialog.wide { width: min(860px, 96vw); }
dialog::backdrop { background: rgba(15, 23, 42, .45); }
dialog form { padding: 18px; }
dialog h2 { margin-top: 0; }
dialog .dlg-body > * + * { margin-top: 10px; }
.kpi a { font-size: 13px; }
.wht-cell { display: flex; gap: 4px; align-items: center; white-space: nowrap; }
.wht-cell select { width: 150px; }