System Fonts in action on rawg.io

Under the hood

.header-1 { font-family: -apple-system, system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif; font-size: 72px; font-style: normal; font-weight: 700; letter-spacing: normal; line-height: 74px; text-transform: none; color: #FFFFFF; }
.content-1 { font-family: -apple-system, system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif; font-size: 24px; font-style: normal; font-weight: 700; letter-spacing: 1px; line-height: 28px; text-transform: none; color: #FFFFFF; }
.content-2 { font-family: -apple-system, system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif; font-size: 12px; font-style: normal; font-weight: 400; letter-spacing: 3px; line-height: 14px; text-transform: uppercase; }
.content-3 { font-family: -apple-system, system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif; font-size: 14px; font-style: normal; font-weight: 700; letter-spacing: normal; line-height: 16px; text-transform: none; color: #FFFFFF; }
.content-4 { font-family: -apple-system, system-ui, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif; font-size: 18px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: normal; text-transform: none; color: #000000; }