:root {
  font-family: system-ui, sans-serif;
  color: #17212b;
  background: #f5f6f7;
}
main {
  max-width: 900px;
  margin: 32px auto;
  padding: 0 20px;
}
section {
  background: white;
  border: 1px solid #cbd0d5;
  padding: 20px;
  margin: 18px 0;
}
h1 {
  font-size: 28px;
}
h2 {
  font-size: 20px;
}
label {
  display: block;
  margin: 12px 0;
}
input,
select,
button {
  font: inherit;
  padding: 8px;
  margin: 4px;
}
button {
  cursor: pointer;
}
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid #1464bf;
}
pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
video {
  display: block;
  width: 100%;
  max-height: 400px;
  background: #101010;
}
li {
  margin: 8px 0;
}
output {
  display: block;
  margin: 8px;
}