html,
body {
  box-sizing: border-box;
  min-height: 100%;
}
body {
  color: #444;
  font-family: -apple-system,system-ui,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
  margin: 0 auto;
  max-width: 650px;
  padding: 40px 10px;
  text-rendering: optimizeLegibility;
}
h1,
h2,
h3 {
  line-height: 1.2
}

a {
  color: #0080c5;
  text-decoration: none;
}

button {
  background: #009cf0;
  border: none;
  border-bottom: 4px solid #0080c5;
  border-radius: 4px;
  color: white;
  cursor: pointer;
  padding: 12px 16px;
  transition: all 0.1s ease-in-out;
}

button:hover {
  background: #0097e9;
}

button:focus {
  border-bottom-color: #009cf0;
  margin-top: 2px;
  outline: none;
  padding-bottom: 10px;
}

img {
  height: auto;
  max-width: 100%;
}