Hi, I've purchased a Joie stages car seat but havent taken it out of the box cause I've just checked the Joie website and it says its not compatible with my 2011 Hyundai i30. I'm confused as I thought car seats just fitted in any car, are they not universal? My daughters 14 and a half months and rf in her infant seat but i'm looking to move her up to a rf car seat that i can keep her rf for as long as possible. She hasnt been weighed in a long time due to covid but shes a bit petite. Anybody drive the same car or have any sugestions. TIA x