$ErrorActionPreference = 'Stop'
$root = Split-Path -Parent $PSScriptRoot
$page = Get-Content -LiteralPath (Join-Path $root 'pages/genealogy/g12-generation-poems.vue') -Raw -Encoding utf8
$style = [regex]::Match($page, '(?s)<style[^>]*>(.*?)</style>').Groups[1].Value
$positions = [regex]::Matches([regex]::Replace($style, '(?s)/\*.*?\*/', ''), '(?m)\bposition\s*:\s*([^;]+);')
if ($positions.Count -ne 1 -or $positions[0].Groups[1].Value.Trim() -ne 'fixed') {
  throw "G12 must retain only its fixed feedback layer; found $($positions.Count) position declarations"
}
foreach ($required in @(
  'background: url("/static/assets/modules/genealogy/transparent/g01-empty-panel-frame.png")',
  'background: url("/static/assets/modules/genealogy/transparent/g-form-field-frame.png")',
  'background: url("/static/assets/foundation/transparent/a01-scroll-secondary-v3.png")'
)) { if ($page -notmatch [regex]::Escape($required)) { throw "G12 is missing real asset background: $required" } }
if ($page -notmatch '(?s)<textarea[^>]*auto-height') { throw 'G12 generation poem field must grow from its text data' }
Write-Output 'G12-DOCUMENT-FLOW-CONTRACT PASS'