:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1c1c1e;
  background: #f2f2f7;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: 1fr auto;
}

main {
  width: min(680px, calc(100% - 40px));
  margin: auto;
  padding: 48px 0;
}

.mark {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 20px;
  color: #fff;
  background: #1671dc;
  font-size: 30px;
  font-weight: 700;
}

h1 { margin: 24px 0 8px; font-size: 34px; }
h2 { font-size: 20px; }
p { line-height: 1.7; }
.note { color: #68707e; }

section {
  margin-top: 32px;
  padding: 20px;
  border-radius: 20px;
  background: #fff;
}

footer {
  padding: 24px;
  text-align: center;
  font-size: 13px;
}

a { color: #1671dc; }