:root {
  --ink: #171717;
  --muted: #625f58;
  --paper: #fff;
  --wash: #f4f0e7;
  --rule: #b9ae9c;
  --red: #842626;
}

* { box-sizing: border-box; }

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
}

body { padding: 1.1rem; }

main {
  width: min(100%, 42rem);
  margin: 0 auto;
}

h1 {
  margin: 0 0 0.25rem;
  font-size: 1.45rem;
  font-weight: normal;
  letter-spacing: 0.04em;
}

p { line-height: 1.42; }

.lede,
.muted {
  color: var(--muted);
}

.lede { margin: 0 0 1rem; }

.panel {
  margin: 0 0 0.8rem;
  padding: 0.8rem;
  border: 1px solid var(--rule);
  background: var(--wash);
}

label,
.label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

input,
select,
button,
.button-link {
  width: 100%;
  min-height: 2.25rem;
  border: 1px solid #766d61;
  border-radius: 0;
  background: #fff;
  color: #111;
  font: inherit;
}

input,
select { padding: 0.4rem 0.5rem; }

button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  text-decoration: none;
}

button:disabled {
  cursor: default;
  opacity: 0.45;
}

.row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: end;
}

.row button { width: auto; }

.address,
code {
  overflow-wrap: anywhere;
  font-family: "Courier New", monospace;
  font-size: 0.82rem;
}

.address {
  min-height: 2.5rem;
  margin: 0.25rem 0;
  padding: 0.45rem;
  border: 1px solid #d2c8b8;
  background: #fff;
}

.check {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem;
  align-items: start;
  margin: 0.8rem 0;
  font-size: 0.88rem;
  letter-spacing: 0;
  line-height: 1.35;
  text-transform: none;
}

.check input {
  width: auto;
  min-height: 0;
  margin-top: 0.2rem;
}

.status {
  min-height: 2.5rem;
  padding: 0.55rem;
  border-left: 3px solid #746c61;
  background: #f8f8f8;
  font-size: 0.86rem;
}

.status.error {
  border-color: var(--red);
  color: var(--red);
}

.frame-notice {
  margin-bottom: 0.8rem;
  padding: 0.65rem;
  border: 1px solid var(--red);
}

.frame-notice p { margin-top: 0; }

.small { font-size: 0.78rem; }

@media (max-width: 520px) {
  body { padding: 0.65rem; }
  .row { grid-template-columns: 1fr; }
  .row button { width: 100%; }
}