.tp-retro { background: linear-gradient(135deg, #0d1117 60%, #00ff41 100%); }

[data-theme="retro"] .window          { border-color: #00ff41; border-radius: 0; }
[data-theme="retro"] .window-titlebar { background: #000; border-bottom-color: #00ff41; }
[data-theme="retro"] .window-title    { color: #00ff41; font-family: var(--font-mono); }
[data-theme="retro"] body             { font-family: var(--font-mono); }