html {
  font-family: system-ui, sans-serif;
  background: #101b2b;
  color: #e9eff7;
}
body {
  margin: 0;
}
main {
  max-width: 860px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}
.brand {
  color: #6bd8cb;
  letter-spacing: 0.1em;
}
h1 {
  font-size: 2.3rem;
}
section {
  background: #1c2b40;
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
}
.notice {
  border-left: 3px solid #6bd8cb;
  padding-left: 1rem;
}
label {
  display: block;
  margin: 1rem 0;
}
input,
textarea {
  display: block;
  box-sizing: border-box;
  width: 100%;
  padding: 0.7rem;
  margin-top: 0.4rem;
  background: #101b2b;
  color: #fff;
  border: 1px solid #70819a;
  border-radius: 5px;
  font: inherit;
}
button {
  background: #6bd8cb;
  color: #101b2b;
  border: 0;
  border-radius: 5px;
  padding: 0.8rem 1.2rem;
  font: inherit;
  cursor: pointer;
}
pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: #101b2b;
  padding: 1rem;
  border-radius: 5px;
}