block-style.css

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-size: 15px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body h1,
body h2,
body h3,
body h4,
body h5,
body h6 {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  font-family: inherit;
  font-weight: 700;
  line-height: 1.2;
  color: inherit;
}
body h1 {
  font-size: 2.5rem;
}
body h2 {
  font-size: 2rem;
}
body h3 {
  font-size: 1.75rem;
}
body h4 {
  font-size: 1.5rem;
}
body h5 {
  font-size: 1.25rem;
}
body h6 {
  font-size: 1rem;
}
body p {
  margin-top: 0;
  margin-bottom: 0.9rem;
}

img {
  height: auto;
}

.wp-block-navigation__submenu-container > .wp-block-navigation-item {
  color: var(--wp--preset--color--black)!important;
}

.wp-site-blocks > * {
  margin-top: 0!important;
}