@font-face {
  font-family:"Montserrat";
  font-style:normal;
  font-weight:100 900;
  font-display:swap;
  src:url("../fonts/montserrat.woff2") format("woff2");
}

:root {
  --blue: #1E71EE;
  --navy: #0B3278;
  --ink: #081240;
  --line: rgba(11,50,120,.12);
  --muted: rgba(11,50,120,.68);
  --font: "Montserrat","Circe",Arial,sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  color: var(--navy);
  background: #F4F7FB;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue);
  text-underline-offset: 2px;
  border-radius: 4px;
}

a:focus-visible {
  outline: 3px solid rgba(30,113,238,.5);
  outline-offset: 3px;
}

.top {
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.top .in {
  max-width: 880px;
  margin: 0 auto;
  padding: 18px 40px;
}

.top img {
  display: block;
  height: 44px;
  width: auto;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 40px 80px;
}

h1 {
  font: 800 36px/44px var(--font);
  color: var(--ink);
  margin-bottom: 32px;
}

h2 {
  font: 700 20px/28px var(--font);
  color: var(--ink);
  margin: 32px 0 10px;
}

p,
li {
  font: 500 17px/27px var(--font);
}

ul {
  padding-left: 22px;
}

li+li {
  margin-top: 4px;
}

.todo {
  background: #FFF1B8;
  border-radius: 4px;
  padding: 1px 4px;
  color: var(--ink);
}

.back {
  display: inline-block;
  margin-top: 40px;
  font: 700 15px/20px var(--font);
}

@media (max-width:720px) {
  .top .in {
    padding: 12px 20px;
  }

  main {
    padding: 32px 20px 56px;
  }

  h1 {
    font-size: 26px;
    line-height: 32px;
  }

  p,
  li {
    font-size: 16px;
    line-height: 25px;
  }
}