body {
  margin: 0;
  padding: 0 1rem;
  background: #f5f7fa;
  color: #17202a;
  font: 1rem/1.55 system-ui, sans-serif;
}

main {
  max-width: 760px;
  margin: min(12vh, 6rem) auto;
  padding: clamp(1.5rem, 5vw, 3rem);
  border: 1px solid #dbe2ea;
  border-radius: 1rem;
  background: white;
}

h1 { margin-top: 0; line-height: 1.2; }
p { color: #455468; }
a { color: #2258a5; }
label { display: block; margin-bottom: .5rem; font-weight: 600; }
input, button { font: inherit; }
input { box-sizing: border-box; width: 100%; padding: .7rem; border: 1px solid #aab8c7; border-radius: .4rem; }
button { margin-top: .8rem; padding: .7rem 1rem; border: 0; border-radius: .4rem; background: #2258a5; color: white; cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid #2258a5; outline-offset: 2px; }
pre { max-height: 22rem; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; }