* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  line-height: 1.7;
}
img {
  border-style: none;
  vertical-align: baseline;
}
html {
  -webkit-text-size-adjust: 100%;
}
main {
  display: block;
}
hr {
  box-sizing: content-box;
  height: 0;
  overflow: visible;
}
pre {
  font-family: monospace, monospace;
  font-size: 1em;
}
a {
  background-color: transparent;
}
b,
strong {
  font-weight: bolder;
}
small {
  font-size: 80%;
}