hello, I made it like this

/*

• MMM-Weather custom
  */

.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .time,
.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .day-name {
font-size: 22px !important;
}

.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .temperature,
.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .temperature-container {
font-size: 26px !important;
}

.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .precipitation-container,
.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .wind-container {
font-size: 22px !important;
}

.MMM-Weather .wrapper.table .forecast-container {
font-size: 22px !important;
}

.MMM-Weather .wrapper.table .forecast-container .forecast-item > span,
.MMM-Weather .wrapper.table .forecast-container .header-row > span {
font-size: 22px !important;
}

.MMM-Weather .wrapper.table .forecast-container .header-row > span {
font-size: 17px !important;
}

.MMM-Weather .wrapper.table .forecast-container .header-row .temperature-header {
font-size: 22px !important;
}

.MMM-Weather .current-conditions-wrapper .icon {
width: 180px;
height: 180px;
}
.MMM-Weather .inline-icon,
.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .inline-icon {
width:45px;
height: 45px;

}
.MMM-Weather .extra-current-conditions-wrapper .feels-sun-container .inline-icon {
width: 26px;
height: 26px;
}
.MMM-Weather .wrapper.tiled .forecast-container .forecast-item .forecast-icon {
width: 80px;
height: 80px;
}
.MMM-Weather .wrapper.table .forecast-container .forecast-item .forecast-icon {
width: 50px;
height: 50px;

Hello,
takes PIR sensor HC-SR501 it works on , perso
I ordered to see a Doppler Microwave Sensor RCWL-0516 to replace HC SR501
see topic
https://forum.magicmirror.builders/topic/11704/update-replaced-my-pir-sensor-with-a-doppler-microwave-sensor
( more aesthetic )

hi
yes you can with usb image
link in french
https://www.clubic.com/telecharger-fiche366602-imageusb.html