.buy-step-box {
  margin-bottom: 30px;
  background: #f7fafc;
  border-radius: 12px;
  border: 1px solid #e0e0e0;
  padding: 18px;
}
.buy-step-title {
  margin: 0 0 10px 0;
  font-size: 1.09em;
  font-weight: bold;
  color: #2196f3;
}
.buy-step-list {
  margin: 0;
  padding-left: 10px;
  color: #333;
  font-size: 1.0em;
}
.user-email-copy-box {
  padding: 10px;
  background: #f4f8fd;
  border-radius: 8px;
  border: 1px solid #e3e3e3;
  display: none; /* JSで切り替え */
  min-width: 210px;
  text-align: center;
  margin: 8px 0;
}
.user-email-copy-mail {
  font-size: 1.15em;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #2176c1;
  user-select: all;
}
.user-email-copy-btn {
  border: none;
  background: #eaf0fa;
  border-radius: 4px;
  cursor: pointer;
  padding: 4px 7px;
  transition: background .18s;
  margin-left: 8px;
  vertical-align: middle;
}
.user-email-copy-btn:hover {
  background: #d4eaff;
}
.copied-msg {
  margin-left: 8px;
  color: #37b46e;
  display: none;
  font-size: 0.97em;
}
.copy-icon {
  vertical-align: -6px;
}