Yeah I tried using a similar "golden rule" after reading a design article about it. I based my css variable sizes on it but I kept having to use manual px and rem values instead because stuff just never felt correct.
1.618 is complete nonsense that people hang on to because they want it to be true. It doesn't stack up, neither in ancient Greek times, nor in the renaissance, nor today. It's a dumb idea that needs to die.
