#mobile-membership-error {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.25);
  z-index: 9999;
  justify-content: center;
  align-items: center;
}

#mobile-membership-error-content {
  background: #fff;
  border-radius: 13px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
  width: 85vw;
  max-width: 320px;
  padding: 24px 18px 12px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#mobile-membership-error-message {
  font-size: 17px;
  font-family: sans-serif;
  color: #222;
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.4;
}

#mobile-membership-error-ok {
  width: 100%;
  padding: 12px 0;
  font-size: 17px;
  font-family: inherit;
  font-weight: 400;
  background: #fff;
  border: none;
  color: #007aff;
  border-radius: 0 0 13px 13px;
  cursor: pointer;
  transition: background 0.2s;
  outline: none;
}

#mobile-membership-error-ok:active {
  background: #f2f2f7;
}