better-auth/docs/app/changelogs/layout.tsx

import { Layout } from "./_components/_layout";
import { useId } from "react";

import { Intro, IntroFooter } from "./_components/changelog-layout";
import { StarField } from "./_components/stat-field";

function Timeline() {
  let id = useId();

  return (
    <div className="pointer-events-none absolute inset-0 z-50 overflow-hidden lg:right-[calc(max(2rem,50%-38rem)+40rem)] lg:min-w-[32rem] lg:overflow-visible">
      <svg
        className="absolute left-[max(0px,calc(50%-18.125rem))] top-0 h-full w-1.5 lg:left-full lg:ml-1 xl:left-auto xl:right-1 xl:ml-0"
        aria-hidden="true"
      >
        <defs>
          <pattern id={id} width="6" height="8" patternUnits="userSpaceOnUse">
            <path
              d="M0 0H6M0 8H6"
              className="stroke-sky-900/10 xl:stroke-white/10 dark:stroke-white/10"
              fill="none"
            />
          </pattern>
        </defs>
        <rect width="100%" height="100%" fill={`url(#${id})`} />
      </svg>
    </div>
  );
}

function Glow() {
  let id = useId();

  return (
    <div className="absolute  inset-0 -z-10 overflow-hidden bg-gradient-to-tr from-transparent via-stone-950/5 to-transparent/10 lg:right-[calc(max(2rem,50%-38rem)+40rem)] lg:min-w-[32rem]">
      <svg
        className="absolute -bottom-48 left-[-40%] h-[80rem] w-[180%] lg:-right-40 lg:bottom-auto lg:left-auto lg:top-[-40%] lg:h-[180%] lg:w-[80rem]"
        aria-hidden="true"
      >
        <defs>
          <radialGradient id={`${id}-desktop`} cx="100%">
            <stop offset="0%" stopColor="rgba(41, 37, 36, 0.4)" />
            <stop offset="53.95%" stopColor="rgba(28, 25, 23, 0.09)" />
            <stop offset="100%" stopColor="rgba(0, 0, 0, 0)" />
          </radialGradient>
          <radialGradient id={`${id}-mobile`} cy="100%">
            <stop offset="0%" stopColor="rgba(41, 37, 36, 0.3)" />
            <stop offset="53.95%" stopColor="rgba(28, 25, 23, 0.09)" />
            <stop offset="100%" stopColor="rgba(0, 0, 0, 0)" />
          </radialGradient>
        </defs>
        <rect
          width="100%"
          height="100%"
          fill={`url(#${id}-desktop)`}
          className="hidden lg:block"
        />
        <rect
          width="100%"
          height="100%"
          fill={`url(#${id}-mobile)`}
          className="lg:hidden"
        />
      </svg>
      <div className="absolute inset-x-0 bottom-0 right-0 h-px bg-white/5 mix-blend-overlay lg:left-auto lg:top-0 lg:h-auto lg:w-px" />
    </div>
  );
}

function FixedSidebar({
  main,
  footer,
}: {
  main: React.ReactNode;
  footer: React.ReactNode;
}) {
  return (
    <div className="relative  flex-none overflow-hidden px-10 lg:pointer-events-none md:fixed lg:inset-0 lg:z-40 lg:flex lg:px-0">
      <Glow />
      <div className="relative flex w-full lg:pointer-events-auto lg:mr-[calc(max(2rem,50%-35rem)+40rem)] lg:min-w-[32rem] lg:overflow-y-auto lg:overflow-x-hidden lg:pl-[max(4rem,calc(50%-44rem))]">
        <div className="mx-auto pr-20 max-w-lg lg:mx-auto  lg:flex  lg:max-w-4xl  lg:flex-col lg:before:flex-1 lg:before:pt-6">
          <div className="pb-16  pt-20 sm:pb-20 sm:pt-32 lg:py-20">
            <div className="relative ">
              <StarField className="-right-44 top-14" />
              {main}
            </div>
          </div>
          <div className="flex flex-1 items-end justify-center pb-4 lg:justify-start lg:pb-6">
            {footer}
          </div>
        </div>
      </div>
    </div>
  );
}

const ChangeLogLayout = ({ children }: { children: React.ReactNode }) => {
  return (
    <div className="h-full font-sans overflow-y-auto">
      <FixedSidebar main={<Intro />} footer={<IntroFooter />} />
      <div />
      <div className="relative overflow-y-auto  flex gap-2 justify-start items-start">
        <Timeline />
        <div className="space-y-20 py-20 w-[80%] mx-auto md:mx-0 md:ml-auto md:w-1/2 h-screen sm:space-y-20 sm:py-20">
          {children}
        </div>
      </div>
    </div>
  );
};

export default ChangeLogLayout;