[data-theme="polygon-window"] {
  --color-bg:        #008080;
  --color-surface:   #C0C0C0;
  --color-surface2:  #C0C0C0;
  --color-border:    rgba(18, 2, 2, 0.45);
  --color-accent:    #000080;
  --color-secondary: #008080;
  --color-text:      #000080;
  --color-muted:     #4A4A4A;

  --font-mono:  'MS Sans Serif', monospace;
  --font-size:  14px;

  --scanlines:   repeating-linear-gradient(
    0deg,
    rgba(0,0,0,0.18) 0px,
    rgba(0,0,0,0.18) 1px,
    transparent 1px,
    transparent 2px
  );

  --glow-accent: 0 0 8px rgba(0, 0, 128, 0.40);
  --glow-text:   0 0 6px rgba(0, 0, 128, 0.25);
}