/* One column: form, then the signature preview as the one framed object. */
:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --fg: #1d2330;
  --muted: #5d6677;
  --line: #dde1e8;
  --accent: #1f5fbf;
  --accent-fg: #ffffff;
  --ok: #1d7a46;
  --err: #b42318;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171d; --surface: #1d2129; --fg: #e8ebf0; --muted: #9aa3b2;
    --line: #313744; --accent: #6b9eea; --accent-fg: #0f1520; --ok: #5cc48a; --err: #f08a80;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap {
  max-width: 680px; margin: 0 auto;
  padding: 32px max(16px, env(safe-area-inset-right, 0px)) 48px max(16px, env(safe-area-inset-left, 0px));
  display: grid; gap: 28px;
}
h1 { font-size: 24px; margin: 0; text-wrap: balance; }
.lede { margin: 6px 0 0; color: var(--muted); }
.step { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 10px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid .full { grid-column: 1 / -1; }
@media (max-width: 540px) { .grid { grid-template-columns: 1fr; } }
label { display: grid; gap: 5px; font-size: 13px; font-weight: 600; color: var(--muted); }
input, select {
  font: inherit; color: var(--fg); background: var(--surface);
  border: 1px solid var(--line); border-radius: 6px; padding: 9px 10px; min-width: 0; width: 100%;
}
input[type="color"] { padding: 2px; height: 40px; }
input:focus-visible, select:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.radios { display: flex; gap: 18px; flex-wrap: wrap; }
.radios label { display: flex; align-items: center; gap: 6px; color: var(--fg); font-weight: 500; font-size: 15px; }
.radios input { width: auto; }
.hint { color: var(--muted); font-size: 13px; margin: 0; }
/* The preview always sits on white, like most recipients' inboxes. */
.preview { background: #ffffff; border: 1px solid var(--line); border-radius: 8px; padding: 24px; overflow-x: auto; }
.actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 14px; }
button {
  font: inherit; font-weight: 600; cursor: pointer;
  background: var(--accent); color: var(--accent-fg);
  border: 0; border-radius: 6px; padding: 11px 20px;
}
button.quiet { background: transparent; color: var(--muted); padding: 6px 0; text-decoration: underline; }
.status { font-weight: 600; font-size: 14px; color: var(--ok); }
.status.error { color: var(--err); }
details { border-top: 1px solid var(--line); padding-top: 16px; }
summary { cursor: pointer; font-weight: 600; }
details ol { padding-left: 20px; line-height: 1.6; color: var(--muted); }
details b { color: var(--fg); }
.topbar { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.offscreen { position: absolute; left: -9999px; top: 0; }
[hidden] { display: none !important; }
.stack { display: grid; gap: 28px; }
.mt { margin-top: 14px; }
.mt-s { margin-top: 10px; }
.actions.flush { margin-top: 0; }
.linkbar {
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px;
}
.linkbar .step { margin-bottom: 2px; }
.linkbar a { color: var(--accent); font-weight: 600; word-break: break-all; }
.danger { border-top: 1px solid var(--line); padding-top: 16px; }
.danger-btn { background: var(--err); color: #ffffff; padding: 8px 16px; }
.formats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 540px) { .formats { grid-template-columns: 1fr; } }
.format {
  display: flex; align-items: flex-start; gap: 10px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px;
  color: var(--fg); font-weight: 400; font-size: 15px;
}
.format input { width: auto; margin-top: 4px; }
.format span { display: grid; gap: 2px; }
.format small { color: var(--muted); font-size: 13px; line-height: 1.4; }
.format:has(input:checked) { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.check { display: flex; align-items: center; gap: 8px; color: var(--fg); font-weight: 500; font-size: 15px; }
.check input { width: auto; }
#mainPhoneHint, #emailDomainHint { align-self: end; padding-bottom: 10px; }
.suffix { display: flex; align-items: stretch; }
.suffix.locked input { border-top-right-radius: 0; border-bottom-right-radius: 0; flex: 1; }
.suffix span {
  display: flex; align-items: center; padding: 0 10px; white-space: nowrap;
  border: 1px solid var(--line); border-left: 0; border-radius: 0 6px 6px 0;
  background: var(--bg); color: var(--muted); font-weight: 500; font-size: 15px;
}
button.secondary { background: var(--surface); color: var(--fg); border: 1px solid var(--line); }
.guide { display: grid; gap: 14px; border-top: 1px solid var(--line); padding-top: 24px; }
.guide h2 { font-size: 20px; margin: 0; }
.guide details { border-top: 0; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.guide summary { font-size: 17px; }
.guide ol { color: var(--fg); padding-left: 22px; margin: 12px 0; line-height: 1.7; }
.guide .hint { margin-top: 10px; }
.guide img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 6px; margin: 4px 0 8px; }
.guide a { color: var(--accent); }
/* Step numbers that match the red badges in the screenshots. */
.n {
  display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%;
  background: #e5341f; color: #ffffff; font-size: 12px; font-weight: 700; vertical-align: 1px;
}