:root {
  --ink: #23262B;
  --paper: #EFE8D8;
  --paper-2: #E6DDC8;
  --wax: #7A2331;
  --wax-dark: #5E1A25;
  --sage: #5B7A5E;
  --text-on-ink: #D9D4C7;
  --text-on-ink-muted: #9A9488;
  --text-on-paper: #2A241C;
  --text-on-paper-muted: #6B6252;
  --danger: #B24A3B;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--ink);
  color: var(--text-on-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  min-height: 100vh;
  padding: 48px 20px 64px;
}
.wrap { max-width: 560px; margin: 0 auto; }
.wordmark {
  text-align: center;
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 28px;
  margin: 0 0 6px;
}
.tagline { text-align: center; color: var(--text-on-ink-muted); font-size: 14px; margin: 0 0 36px; }
.card { background: var(--paper); color: var(--text-on-paper); border-radius: 6px; padding: 32px; }
.field-label { display: block; font-size: 13px; color: var(--text-on-paper-muted); margin-bottom: 8px; }
textarea, input[type=text] {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  padding: 12px;
  border: 1px solid #C9BFA6;
  border-radius: 4px;
  background: #FBF8F0;
  color: var(--text-on-paper);
  resize: vertical;
}
textarea:focus, input[type=text]:focus { outline: 2px solid var(--wax); outline-offset: 1px; }
.expiry-row { display: flex; align-items: center; gap: 14px; margin: 20px 0 26px; }
input[type=range] { flex: 1; accent-color: var(--wax); }
.expiry-value { font-size: 14px; min-width: 70px; text-align: right; color: var(--text-on-paper-muted); }
button.primary {
  width: 100%;
  background: var(--wax);
  color: #F1E4E0;
  border: none;
  border-radius: 4px;
  padding: 13px;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}
button.primary:hover { background: var(--wax-dark); }
button.primary:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
button.primary:disabled { opacity: 0.55; cursor: not-allowed; }
.error-text { color: var(--danger); font-size: 13px; margin-top: 8px; }
.hint { color: var(--text-on-paper-muted); font-size: 13px; margin-top: 6px; }
.seal-wrap { display: flex; justify-content: center; margin: 28px 0 8px; }
.result { margin-top: 24px; padding-top: 22px; border-top: 1px solid #D8CDB2; }
.code-box { display: flex; gap: 8px; margin-top: 10px; }
.code-box input { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 12.5px; background: #FBF8F0; }
.copy-btn {
  background: var(--paper-2);
  border: 1px solid #C9BFA6;
  border-radius: 4px;
  padding: 0 16px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-on-paper);
  font-family: inherit;
}
.copy-btn:focus-visible { outline: 2px solid var(--wax); outline-offset: 2px; }
.secret-reveal {
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: 17px;
  line-height: 1.6;
  white-space: pre-wrap;
  background: #FBF8F0;
  border: 1px solid #D8CDB2;
  border-radius: 4px;
  padding: 16px;
  margin-top: 12px;
}
.note { text-align: center; color: var(--text-on-ink-muted); font-size: 12.5px; margin-top: 28px; line-height: 1.6; }
.status-line { font-size: 14px; margin-top: 16px; }
.status-ok { color: var(--sage); }
.status-bad { color: var(--danger); }
a { color: var(--wax); }