Private/Get-DhCssGreyDark.ps1

function Get-DhCssGreyDark {
    <#
    .SYNOPSIS Returns the :root variable block for the GreyDark theme.
               Called by Get-DhThemeCss which appends the shared structural CSS.
    #>

    return @'
:root {
  /* GreyDark — Cool dark neutral grey, blue-grey muted accent
     Easy on the eyes for long sessions, no strong colour cast */

  --bg-page: #1A1A1A;
  --bg-header: #1A1A1A;
  --bg-surface: #242424;
  --bg-table: #1E1E1E;
  --bg-row-alt: #2A2A2A;
  --bg-row-hover: #333333;
  --bg-row-sel: #1E3040;
  --bg-thead: #2D2D2D;

  --accent-primary: #78909C;
  --accent-secondary: #546E7A;
  --accent-danger: #EF5350;
  --accent-warn: #FFB300;
  --accent-ok: #66BB6A;

  --export-csv-bg: #0E2A12; --export-csv-fg: #66BB6A; --export-csv-bdr: #1A4422;
  --export-xlsx-bg: #0E2A12; --export-xlsx-fg: #81C784; --export-xlsx-bdr: #1A4422;
  --export-pdf-bg: #2A1010; --export-pdf-fg: #EF5350; --export-pdf-bdr: #441414;

  --text-primary: #E0E0E0;
  --text-secondary: #9E9E9E;
  --text-muted: #616161;
  --text-accent: #90A4AE;
  --text-invert: #1A1A1A;

  --border-subtle: #303030;
  --border-medium: #3E3E3E;
  --border-strong: #78909C44;

  --font-ui: 'Segoe UI', 'SF Pro Text', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;
  --font-display: 'Segoe UI', 'SF Pro Display', system-ui, -apple-system, sans-serif;

  --size-xs: 0.75rem;
  --size-sm: 0.85rem;
  --size-base: 0.9375rem;
  --size-md: 1.05rem;
  --size-lg: 1.30rem;
  --size-xl: 1.65rem;

  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 700;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 36px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --trans-fast: 150ms ease;
  --trans-normal: 250ms ease;

  --row-height: 40px;
  --header-height: 76px;
  --nav-height: 44px;

  --shadow-md: 0 4px 16px rgba(0,0,0,0.65);
  --shadow-glow: 0 0 14px rgba(120,144,156,0.14);

  --cell-ok-fg: #81C784; --cell-ok-bg: rgba(129,199,132,0.10);
  --cell-warn-fg: #FFB74D; --cell-warn-bg: rgba(255,183,77,0.10);
  --cell-danger-fg: #E57373; --cell-danger-bg: rgba(229,115,115,0.10);

  --progress-track-bg: rgba(255,255,255,0.07);

  --nav-bg: #1A1A1A;
  --nav-border: #303030;
  --nav-title-fg: #5A5A5A;
  --nav-link-fg: #9E9E9E;
  --nav-link-hover-bg: rgba(120,144,156,0.09);
  --nav-link-hover-fg: #B0BEC5;
  --nav-active-bg: rgba(120,144,156,0.14);
  --nav-active-fg: #CFD8DC;
  --nav-active-border: rgba(120,144,156,0.40);

  --chart-container-bg: #1E1E1E;
  --chart-1: #78909C; --chart-2: #81C784; --chart-3: #FFB74D; --chart-4: #E57373;
  --chart-5: #CE93D8; --chart-6: #FFAB40; --chart-7: #4DD0E1; --chart-8: #C5E1A5;

  /* Header text — ensures legibility on both light and dark header backgrounds */
  --header-fg: #E0E0E0;
  --header-fg-muted: #9E9E9E;
}
'@

}