/* THB Invoice — interface styles.
   Visual idea: a bound ledger. Red spine down the left, ruled rows,
   figures set in tabular numerals so columns of money line up. */

:root {
  --red: #E91F27;
  --red-deep: #C4121A;
  --ink: #16181C;
  --muted: #6A7078;
  --rule: #DCDEE3;
  --rule-soft: #ECEEF1;
  --paper: #FFFFFF;
  --field: #F6F7F9;
  --tint: #FAFAFB;
  --ok: #17703F;
  --ok-bg: #EAF6EE;
  --bad: #A4161A;
  --bad-bg: #FCECEC;
  --radius: 3px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: #EEF0F3;
  color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-variant-numeric: tabular-nums;
}

a { color: var(--red-deep); }
a:hover { color: var(--red); }

:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

/* ── Shell ───────────────────────────────────────────────────────────── */

.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 216px;
  flex: 0 0 216px;
  background: var(--paper);
  border-right: 1px solid var(--rule);
  border-left: 5px solid var(--red);
  padding: 20px 0 28px;
  display: flex;
  flex-direction: column;
}

.mark {
  margin: 0 20px 2px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--red-deep);
}
.mark-sub {
  margin: 0 20px 22px;
  font-size: 12px;
  color: var(--muted);
}

.nav { list-style: none; margin: 0; padding: 0; }
.nav a {
  display: block;
  padding: 8px 20px;
  color: var(--ink);
  text-decoration: none;
  border-left: 3px solid transparent;
}
.nav a:hover { background: var(--tint); }
.nav a.on {
  border-left-color: var(--red);
  background: var(--tint);
  font-weight: 600;
}
.nav-gap { margin-top: 18px; }
.nav-head {
  margin: 0 20px 6px;
  font-size: 12px;
  color: var(--muted);
}

.sidebar-foot {
  margin-top: auto;
  padding: 16px 20px 0;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--rule-soft);
}

.main { flex: 1; min-width: 0; padding: 26px 32px 60px; }

.page-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.page-head h1 { margin: 0; font-size: 23px; letter-spacing: -0.01em; }
.page-head p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

.shell-plain { display: block; background: #EEF0F3; }
.setup, .signin {
  max-width: 420px;
  margin: 8vh auto;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 4px solid var(--red);
  border-radius: var(--radius);
  padding: 28px;
}
.setup h1, .signin h1 { font-size: 20px; margin: 0 0 18px; }

/* ── Panels and tables ───────────────────────────────────────────────── */

.panel {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.panel-head {
  padding: 13px 16px;
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.panel-head h2 { margin: 0; font-size: 15px; }
.panel-body { padding: 16px; }

table.ledger { width: 100%; border-collapse: collapse; }
table.ledger th {
  text-align: left;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  padding: 10px 16px;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
table.ledger td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
table.ledger tbody tr:nth-child(even) { background: var(--tint); }
table.ledger tbody tr:hover { background: #F3F4F7; }
.num { text-align: right; white-space: nowrap; }
.no { font-weight: 600; letter-spacing: 0.01em; }
.sub { color: var(--muted); font-size: 13px; }

.empty { padding: 44px 16px; text-align: center; color: var(--muted); }
.empty p { margin: 0 0 14px; }

/* ── Forms ───────────────────────────────────────────────────────────── */

label { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
label > input, label > select, label > textarea { margin-top: 5px; }

input, select, textarea, .btn {
  font: inherit;
  font-variant-numeric: tabular-nums;
}
input[type=text], input[type=email], input[type=password], input[type=date],
input[type=number], select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--field);
  color: var(--ink);
}
input:focus, select:focus, textarea:focus { background: var(--paper); }
textarea { min-height: 78px; resize: vertical; }

.stack > label:last-of-type { margin-bottom: 20px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 18px; }

.btn {
  display: inline-block;
  padding: 8px 15px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--tint); color: var(--ink); }
.btn-primary {
  background: var(--red);
  border-color: var(--red-deep);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: var(--red-deep); color: #fff; }
.btn-small { padding: 5px 10px; font-size: 13px; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ── Line editor ─────────────────────────────────────────────────────── */

table.lines { width: 100%; border-collapse: collapse; }
table.lines th {
  font-size: 12.5px; color: var(--muted); text-align: left;
  padding: 0 8px 6px; font-weight: 600;
}
table.lines td { padding: 0 8px 8px; vertical-align: top; }
table.lines input { background: var(--paper); }
table.lines .drop {
  border: 0; background: none; color: var(--muted);
  cursor: pointer; font-size: 18px; line-height: 1; padding: 6px;
}
table.lines .drop:hover { color: var(--red); }

.totals { margin-left: auto; width: 320px; }
.totals div {
  display: flex; justify-content: space-between;
  padding: 7px 0; border-bottom: 1px solid var(--rule-soft);
}
.totals .grand {
  border-bottom: 0; border-top: 2px solid var(--ink);
  font-weight: 700; font-size: 17px; padding-top: 10px;
}

/* ── Pills and notes ─────────────────────────────────────────────────── */

.pill {
  display: inline-block; padding: 2px 8px; border-radius: 10px;
  font-size: 12px; border: 1px solid var(--rule); background: var(--tint);
  color: var(--muted); white-space: nowrap;
}
.pill-paid { background: var(--ok-bg); color: var(--ok); border-color: #BFE3CD; }
.pill-sent { background: #EEF2FB; color: #2F4A87; border-color: #CCD8F0; }
.pill-void { background: #F1F1F1; color: #767676; }
.pill-drive { background: var(--ok-bg); color: var(--ok); border-color: #BFE3CD; }

.note {
  padding: 12px 14px; border: 1px solid var(--rule);
  border-left: 3px solid var(--muted);
  border-radius: var(--radius); background: var(--paper);
  margin-bottom: 18px;
}
.note p:first-child { margin-top: 0; }
.note p:last-child { margin-bottom: 0; }
.note-ok  { border-left-color: var(--ok);  background: var(--ok-bg); }
.note-bad { border-left-color: var(--bad); background: var(--bad-bg); }
.note ul { margin: 8px 0 0; padding-left: 20px; }

.preview {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
}
.preview iframe { display: block; width: 100%; height: 900px; border: 0; }

.toolbar {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 16px; align-items: center;
}
.filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.filters label { margin-bottom: 0; }
.filters input, .filters select { width: auto; min-width: 150px; }

@media (max-width: 860px) {
  .shell { display: block; }
  .sidebar { width: auto; border-right: 0; border-bottom: 1px solid var(--rule); }
  .nav { display: flex; flex-wrap: wrap; }
  .nav a { border-left: 0; border-bottom: 3px solid transparent; padding: 8px 14px; }
  .nav a.on { border-left: 0; border-bottom-color: var(--red); }
  .nav-head, .nav-gap, .sidebar-foot { display: none; }
  .main { padding: 18px 14px 50px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .totals { width: 100%; }
}

@media print {
  .sidebar, .toolbar, .page-head .btn-row { display: none; }
  body { background: #fff; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}