@Ix
Install recent nodejs.
I don’t know how you have installed the current version of nodejs. So I cannot give you an exact advice.
Generally I prefer to manage node version with nvm

@poopflavoredcake

do you NEED a ‘mirror’ in the kitchen?

One more vote.

32 Inch Monitor (I read that VA panels have better black levels so decided for this one): $271

Wow, the monitor itself looks really good. But in my opinion, it’s somehow overkill. Generally, MM and your Pi don’t need such a high spec: 165Hz, 1ms, … MM is not game machine or Netflix player.
And if you really assemble Spymirror on your screen, you may lose some of the benefits of those high-class monitors.

A bigger screen would be heavier. It needs more robust frames and mounting methods, and thermal control must also be considered for that kind of monster.

Even though RPI 4 can handle up to 4K60p (3840x2160), It would be a burden for RPI4. If you are considering playing clips on your MM, you may need a stronger device.

So, what is your purpose? Your types of equipment would depend on your needs.

@bobbylx
To emphasize this month, I added this to the cells of this month.

.CX3 .thisMonth {
  background-color: rgb(255 255 255 / 10%);
}

rgb(RED GREEN BLUE / TRANSPARENCY); could be what you were searching.

@bobbylx
For today cell border; Append this into your css/custom.css

/* css/custom.css */
.CX3 .cell.today {
  border: 2px solid #fff; /* default was 1px, so you can change to 2px or whatever */
}

For shadow behind the cell... Could you tell me more details or example?

@ascii27
At this moment, impossible. (Maybe you can manually adjust CSS with the year and month dataset, but it could not be very pleasant and bother things.)
But I’ll consider it in the next update.

@Vauxdvihl
Share your custom.css and config.js with me. (eouia0819@gmail.com)

@Vauxdvihl
It’s normal. It is designed so. ^^;;;; (I hated too many symbols and colors, personally. That is the reason. :D)
If you want to show the symbol even in fullday event,
Append this into your custom.css

.CX3A .cellBody .fullday .event .headline.useSymbol .symbol {
  display: inline-block;
  color: var(--oppositeColor);
}

.CX3A .cellBody .fullday .event .headline.useSymbol .symbol * {
  display: inline-block;
}

@Vauxdvihl

Select what you need and append them into your css/custom.css

1. CX3 symbol only resize

.CX3 .event .headline.useSymbol .symbol {
  font-size: 20px; /* Or whatever you need. The default value is 75% of `.CX3 { --fontsize }` */
}

2. CX3 whole module resize

.CX3 {
  --fontsize: 22px; /* Or whatever you need. The default value is 18px */
}

3. CX3A symbol only resize

.CX3A .event .headline.useSymbol .symbol {
  font-size: 20px; /* Or whatever you need. The default value is 75% of `.CX3A { --fontsize }` */

4. CX3A whole module resize

.CX3A {
  --fontsize: 18px; /* Or whatever you need. The default value is 16px */
}

}

@Vauxdvihl
You failed installation. Reinstall with instruction.

@mrbaloo1337

eventTransformer: (ev) =>{
	const targetCalendars = [ 'SpecificCalendarName', 'AntotherCalendarName' ]; // Fulfill the calendar names you want to apply.
	if (targetCalendars.includes(ev.calendarName) && ev.description) {
		ev.title = ev.description
	}
	return ev
}

Add this into your CX3 configuration.