Unable to override background color in body

[shwethashyam1]

I am unable to override the body in semantic UI. It seems to have broken my entire css styles.
I tried adding !important in my main css but it still does not work.

.body {
  font-family: 'DMSans', sans-serif !important;
  font-weight: 400 !important;
  font-style: normal !important;
  min-height: 100vh !important;
  scroll-behavior: smooth !important;
  text-rendering: optimizeSpeed !important;
  line-height: 1.5 !important;
  background: #FBFAF9 !important;
  color: #595454 !important;
}