CSS Reset básico de https://www.joshwcomeau.com/css/custom-css-reset/

style.css

/*   1. Use a more-intuitive box-sizing model. */
*, *::before, *::after {
  box-sizing: border-box;
}
/*   2. Remove default margin */
* {
  margin: 0;
}
/*   3. Allow percentage-based heights in the application */
html, body {
  height: 100%;
}
/*   Typographic tweaks!
  4. Add accessible line-height
  5. Improve text rendering
*/
body {
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
/*   6. Improve media defaults */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}
/*   7. Remove built-in form typography styles */
input, button, textarea, select {
  font: inherit;
}
/*   8. Avoid text overflows */
p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}
/*   9. Create a root stacking context */
#root, #__next {
  isolation: isolate;
}