/* 1. Use a more-intuitive box-sizing model */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* 2. Remove default margin */
*:not(dialog) {
  margin: 0;
}

/* 3. Enable keyword animations */
@media (prefers-reduced-motion: no-preference) {
  html {
    interpolate-size: allow-keywords;
  }
}

body {
  /* 4. Add accessible line-height */
  line-height: 1.5;
  /* 5. Improve text rendering */
  -webkit-font-smoothing: antialiased;
}

/* 6. Improve media defaults */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

/* 7. Inherit fonts for form controls */
input,
button,
textarea,
select {
  font: inherit;
}

/* 8. Avoid text overflows */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* 9. Improve line wrapping */
p {
  text-wrap: pretty;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  text-wrap: balance;
}

/*
  10. Create a root stacking context
*/
#root,
#__next {
  isolation: isolate;
}

/*
  real css
*/

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 18px;
  margin: 0 auto;
  --brand-color: rebeccapurple;
}

header {
  background-color: var(--brand-color);
  color: whitesmoke;
  font-weight: bold;
  font-size: 50px;
  padding: 1.5em 1em 1em 1em;
}

main {
  padding: 1em;
}

footer {
  background-color: var(--brand-color);
  color: whitesmoke;
  padding: 2em 1em;
  margin-top: 3em;
}

p {
  line-height: 1.3;
}

header > div,
main,
footer > div {
  width: 100%;
  max-width: 30rem;
  margin: 0 auto;
}

header > a,
a:visited {
  color: white;
}

a:hover {
  text-decoration-line: none;
}