* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f7fb;
  color: #172033;
}

main {
  width: min(860px, calc(100vw - 40px));
  margin: 48px auto;
}

h1 {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.15;
}

p {
  max-width: 720px;
  line-height: 1.5;
}

textarea {
  display: block;
  width: 100%;
  margin: 20px 0;
  padding: 14px;
  border: 1px solid #a9b4c7;
  border-radius: 8px;
  font: inherit;
  background: white;
}

button,
a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid #8fa1bd;
  border-radius: 8px;
  background: white;
  color: #172033;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
}

.toolbar,
.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0;
}

output,
pre {
  display: block;
  width: 100%;
  margin-top: 14px;
  padding: 12px;
  border: 1px solid #d2dae8;
  border-radius: 8px;
  background: white;
}

pre {
  min-height: 180px;
  overflow: auto;
  white-space: pre-wrap;
}

.surface {
  margin: 18px 0;
  padding: 18px;
  border: 2px solid #456cba;
  border-radius: 8px;
  background: #edf4ff;
}

.surface h2 {
  margin: 0 0 8px;
  font-size: 20px;
}