:root {
  color-scheme: light dark;
}
body {
  font:
    16px/1.5 system-ui,
    sans-serif;
  margin: 0;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1rem;
}
h1 {
  margin: 0;
}
.sub {
  margin-top: 0;
  opacity: 0.7;
}
textarea, #input {
  width: 100%;
  box-sizing: border-box;
  font:
    14px/1.4 ui-monospace,
    monospace;
  padding: 0.6rem;
}
.row {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin: 0.6rem 0;
}
button {
  padding: 0.45rem 1rem;
  cursor: pointer;
}
#status {
  min-height: 1.5rem;
  margin: 0.5rem 0;
}
#status .err {
  color: #c0392b;
}
details {
  margin-top: 1rem;
}
summary {
  cursor: pointer;
  opacity: 0.7;
}
details label {
  display: block;
  margin: 0.5rem 0;
}
details input[type=text] {
  font: inherit;
  margin-left: 0.5rem;
  padding: 0.2rem 0.4rem;
}