:root {
  color: #16314f;
  background: #eaf1f8;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; padding: 2rem 1rem; }
main { max-width: 45rem; margin: auto; padding: 2.5rem 3rem; background: #fff; border-top: .5rem solid #285baa; }
header { display: flex; justify-content: space-between; gap: 1rem; color: #53667b; }
.brand { font-weight: 700; color: #16314f; }
h1 { font-size: clamp(2.1rem, 6vw, 3.2rem); line-height: 1.15; letter-spacing: -.04em; margin: 2.5rem 0 1.25rem; }
h2 { font-size: 1.5rem; line-height: 1.3; }
h3 { font-size: 1rem; }
.intro { font-size: 1.1rem; }
.notice { border-left: .25rem solid #5379aa; padding: .6rem 1rem; background: #eaf1f8; }
form, section { margin-top: 2rem; }
label { display: block; font-weight: 700; margin: 1.1rem 0 .35rem; }
input, textarea { width: 100%; padding: .75rem; border: 1px solid #78899b; border-radius: .25rem; font: inherit; color: inherit; background: #fff; }
textarea, pre { font-family: monospace; overflow-wrap: anywhere; white-space: pre-wrap; }
#alias-list { padding-left: 1.25rem; }
#alias-list li { margin-bottom: 1rem; overflow-wrap: anywhere; }
#alias-list code { display: block; }
textarea { resize: vertical; }
button { margin-top: 1.25rem; border: 0; border-radius: .3rem; background: #285baa; color: #fff; padding: .8rem 1.2rem; font: inherit; font-weight: 700; cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
:focus-visible { outline: 3px solid #825600; outline-offset: 3px; }
pre { padding: 1rem; background: #eaf1f8; }
#status { color: #833513; min-height: 1.6em; }
footer { border-top: 1px solid #c8d5e3; padding-top: 1rem; margin-top: 2rem; color: #53667b; font-size: .85rem; }
@media (max-width: 540px) {
  body { padding: 0; }
  main { padding: 1.5rem; }
  header { flex-wrap: wrap; }
}