/* Page box and palette measured from the audited reference package:
   text block 30mm from the left and 20mm from the right, header band ending
   at 25mm, footer rule at 272.8mm. */
@page {
  size: A4;
  margin: 32mm 20mm 24mm 30mm;
}

:root {
  --brn-blue: #0797d5;   /* corporate blue, sampled from the CI header asset */
  --brn-grey: #8e8e8e;   /* header ribbon grey, measured from the reference */
  --brn-red: #e01f26;    /* corporate red of the logo mark */
  --brn-ink: #111111;
  --brn-muted: #333333;
  --brn-line: #595959;   /* table rule */
  --brn-tint: #fff3f6;   /* header-row tint used across the reference tables */
}

* { box-sizing: border-box; }

html, body {
  color: var(--brn-ink);
  font-family: "BRN Thai", Arial, sans-serif;
  font-size: 10.5pt;
  line-height: 1.45;
}

body { margin: 0; }

.delivery-document { width: 100%; }

.document-control {
  border-collapse: collapse;
  margin: 0 0 7mm;
  page-break-inside: avoid;
  width: 100%;
}

.document-control th,
.document-control td {
  border: .5pt solid var(--brn-line);
  padding: 2mm 3mm;
  text-align: left;
  vertical-align: top;
}

.document-control th {
  background: var(--brn-tint);
  font-weight: 700;
  white-space: nowrap;
  width: 1%;
}

/* Section headings in the reference are plain black text, not coloured bars. */
h1, h2, h3 { break-after: avoid; color: var(--brn-ink); font-weight: 400; }
h1 { display: none; }            /* the document name is carried by the page header */
h2 { font-size: 11.5pt; margin: 6mm 0 2mm; }
h3 { font-size: 10.5pt; margin: 4mm 0 2mm; }

p { margin: 0 0 3mm; }

ul, ol { margin: 0 0 3.5mm; padding-left: 7mm; }
li { margin: 0 0 1mm; }

code {
  font-family: "DejaVu Sans Mono", "Courier New", monospace;
  font-size: .9em;
  letter-spacing: 0;
  /* Inline paths must break too, or they set the cell's minimum width. */
  overflow-wrap: anywhere;
}

table:not(.document-control) {
  border-collapse: collapse;
  border: .5pt solid var(--brn-line);
  break-inside: auto;
  font-size: 9pt;
  margin: 0 0 5mm;
  table-layout: auto;
  width: 100%;
}

table:not(.document-control) th,
table:not(.document-control) td {
  border: .5pt solid var(--brn-line);
  break-inside: avoid;
  /* Thai runs have no spaces, so cells must be allowed to break anywhere;
     "anywhere" (not "break-word") also lets the table shrink to the page. */
  overflow-wrap: anywhere;
  padding: 1.6mm 2mm;
  text-align: left;
  vertical-align: top;
}

table:not(.document-control) th { background: var(--brn-tint); font-weight: 400; }

/* Column alignment carried over from the Markdown separator row. */
table:not(.document-control) th.a-right,
table:not(.document-control) td.a-right { text-align: right; }
table:not(.document-control) th.a-center,
table:not(.document-control) td.a-center { text-align: center; }

/* Short columns (IDs, dates, counts) shrink to their content instead of
   taking an equal share of the table width. */
table:not(.document-control) th.tight,
table:not(.document-control) td.tight { white-space: nowrap; width: 1%; }

thead { display: table-header-group; }
tr { break-inside: avoid; }

.approval-block__person { break-inside: avoid; margin: 0 0 6mm; }
.approval-block__person h3 { margin: 0 0 2mm; }

.approval-block__line {
  border-bottom: .5pt solid var(--brn-ink);
  display: inline-block;
  min-width: 68mm;
  vertical-align: baseline;
}

.approval-fields {
  line-height: 1.55;
  margin: 0;
  padding: 0;
}

/* Signature blocks: heading and its table stay together, in the reference layout. */
.signature-block { break-inside: avoid; margin: 0 0 5mm; }
.signature-block h2.signature-heading { border-left: none; font-size: 11pt; margin: 5mm 0 2mm; padding-left: 0; }
/* Fixed columns so the signature grid always fits the text block width. */
table.signature-table { table-layout: fixed; }
table.signature-table td { height: 13mm; }
table.signature-table th.tight,
table.signature-table td.tight { white-space: normal; width: auto; }
table.signature-table th:nth-child(1), table.signature-table td:nth-child(1) { width: 32%; }
table.signature-table th:nth-child(2), table.signature-table td:nth-child(2) { width: 26%; }
table.signature-table th:nth-child(3), table.signature-table td:nth-child(3) { width: 22%; }
table.signature-table th:nth-child(4), table.signature-table td:nth-child(4) { width: 20%; }

/* The document-control block repeats its label column, so labels must not stretch. */
.document-control th { width: 1%; }

/* Wide grids (schedule, register, test cases) stay portrait like the
   reference package, so they take a smaller face to fit the text block. */
table.dense { font-size: 7.2pt; }
table.dense th, table.dense td { padding: 1mm 1.2mm; }

/* Figures in the Software Design: full column width, caption under the image. */
.delivery-document figure.figure { margin: 8pt 0 12pt; text-align: center; break-inside: avoid; page-break-inside: avoid; }
.delivery-document figure.figure img { max-width: 100%; max-height: 225mm; border: .5pt solid #bfbfbf; }
.delivery-document figure.figure figcaption { margin-top: 4pt; font-size: 9.5pt; font-weight: 700; }