max-width?

https://developer.mozilla.org/en-US/docs/Web/CSS/min

as-is

.container {
  width: 800%;
  max-width: 90%;
}

to-be

.container {
  width: min(800px, 90%);
}

min-width and max-width

as-is

.container {
  width: 50vw;
  min-width: 400px;
  max-width: 800px;
}

to-be

clamp(min, preferred, max)

.container {
  width: clamp(400px, 50vw, 800px);
}

text gradient

.gradient-text {
  color: transparent;
  background: linear-gradient(to right, red, blue);
  background-clip: text;
}