text: import React from "react"
  import { css } from "@emotion/core"
  import { rhythm } from "../utils/typography"
  import Header from "./header"
  export default ({ children }) => (
    <div
      css={css`
        margin: 0 auto;
        max-width: 700px;
        padding: ${rhythm(2)};
        padding-top: ${rhythm(1.5)};
      `}
    >
      <Header />
      {children}
    </div>
  )
  