body {
  font-family: "Yu Gothic UI", "Meiryo", sans-serif;
  padding: 28px;
  color: #222;
  line-height: 1.7;
}
#msg { font-size: 15px; }
#err { color: #b00020; font-weight: bold; }
#dbg code {
  display: inline-block;
  background: #f3f3f3;
  padding: 4px 8px;
  border-radius: 4px;
  word-break: break-all;
}
.note { color: #666; font-size: 13px; }