.signup-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 24px 0;
  padding: 0;
  list-style: none;
  border-block: 1px solid var(--line);
}
.signup-steps li {
  padding: 12px 10px;
  color: var(--muted);
  font-size: .82rem;
}
.signup-steps li + li { border-left: 1px solid var(--line); }
.signup-steps strong {
  display: inline-grid;
  width: 23px;
  height: 23px;
  margin-right: 5px;
  place-items: center;
  border-radius: 50%;
  background: #e8ebee;
  color: var(--ink);
}
.signup-steps .current { color: var(--blue-700); font-weight: 750; }
.signup-steps .current strong { background: var(--blue-700); color: #fff; }
.auth-switch, .auth-help, .form-submit-note { color: var(--muted); font-size: .88rem; }
.form-section-title { margin: 12px 0 -4px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 1.25rem; }
.form-grid .form-section-title:first-of-type { padding-top: 0; border-top: 0; }
.form-section-help { margin: 0; color: var(--muted); font-size: .88rem; line-height: 1.5; }
.dealership-type { display: grid; gap: 10px; margin: 0; padding: 14px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); }
.dealership-type legend { padding: 0 6px; color: var(--ink); font-weight: 750; }
.dealership-type .choice { display: flex; align-items: flex-start; gap: 10px; padding: 9px 10px; border-radius: var(--radius-sm); background: #f7f8f8; font-weight: 500; cursor: pointer; }
.dealership-type .choice:has(input:checked) { background: #e9f1f8; color: var(--blue-800); }
[hidden] { display: none !important; }
.form-submit-note { margin: 0; text-align: center; }
.notice-list { margin: 20px 0; }
.notice-list ol { margin: 0; padding-left: 20px; line-height: 1.7; }
.product-detail { font-size: .88rem; }
details.auth-help { padding-block: 8px; }
details.auth-help summary { color: var(--blue-700); font-weight: 700; cursor: pointer; }
details.auth-help p { line-height: 1.55; }

@media (max-width: 620px) {
  .signup-steps { grid-template-columns: 1fr; }
  .signup-steps li + li { border-top: 1px solid var(--line); border-left: 0; }
  .form-section-title { grid-column: auto; }
}