* {
  box-sizing: border-box;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}
main {
  padding: 0 3rem;
  position: relative;
  max-width: 50rem;
  margin: 2rem auto;
}
main *:last-child {
  margin-bottom: 0;
}

.back-to-top-wrapper {
  position: absolute;
  top: 100vh;
  right: 0.25rem;
  bottom: -5em;
  width: 3em;
  pointer-events: none;
}

.back-to-top-link {
  position: sticky;
  pointer-events: all;
  top: calc(100vh - 5rem);
  display: inline-block;
  text-decoration: none;
  font-size: 2rem;
  line-height: 3rem;
  text-align: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  padding: 0.25rem;
  border: 1px solid #254568;
  background-color: #d6e3f0;
  transition: transform 0.2s ease-in;
}
.back-to-top-link:hover,
.back-to-top-link:focus {
  transform: scale(1.1);
}
.back-to-top-link:focus {
  outline: none;
  box-shadow: 0 0 0 3px #4e85c0;
}

body {
  font-family: 'Baloo 2', sans-serif;
  min-height: 100vh;
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  margin: 0;
}

header,
footer {
  display: grid;
  place-items: center;
  background-color: #254568;
  color: #fff;
}

header {
  background-color: #254568;
}

h1 {
  font-size: 4rem;
  text-align: center;
}

p {
  font-size: 1.125rem;
  line-height: 1.5;
}