html { -webkit-text-size-adjust: 100%; }

body {
  font-family: Times, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.5;
  max-width: 640px;
  margin: 2em auto;
  padding: 0 1em env(safe-area-inset-bottom);
  background: #fff;
  color: #000;
}

h1 { margin-bottom: 0; font-size: 2em; }
h2 { margin-top: 1.5em; font-size: 1.4em; }

a { color: #0000ee; }
a:visited { color: #551a8b; }
a:focus-visible { outline: 2px solid #0000ee; outline-offset: 2px; }

hr {
  border: 0;
  border-top: 1px solid #888;
  margin: 2em 0;
}

ul { padding-left: 1.5em; }
li {
  margin: 0.5em 0;
  min-height: 1.6em;
}
li a {
  display: inline-block;
  min-height: 44px;
  line-height: 44px;
  padding: 0 0.25em;
}
li.active a { font-weight: bold; }

audio {
  display: block;
  width: 100%;
  margin: 0.75em 0;
}

@media (max-width: 480px) {
  body { margin: 1em auto; padding: 0 0.75em env(safe-area-inset-bottom); }
  h1 { font-size: 1.6em; }
  h2 { font-size: 1.2em; }
}