<form class="radikalwp-form-newsletter" action="#"><div class="radikalwp-form-newsletter-row"><input class="radikalwp-form-newsletter-input" type="email" placeholder="ایمیل شما" required aria-label="ایمیل"><button class="radikalwp-form-newsletter-btn" type="submit">عضویت<//button><//div><p class="radikalwp-form-newsletter-note">با عضویت، هفته‌ای یک ایمیل کوتاه از کدهای جدید می‌گیرید — بدون اسپم.<//p><//form>

.radikalwp-form-newsletter { max-width: 400px; }
.radikalwp-form-newsletter-row {
  display: flex;
  gap: 8px;
  background: #fff;
  padding: 5px;
  border-radius: 14px;
}
.radikalwp-form-newsletter-input {
  flex: 1;
  min-width: 0;
  padding: 11px 14px;
  font-family: inherit;
  font-size: 13.5px;
  color: #1e293b;
  border: none;
  outline: none;
  background: transparent;
}
.radikalwp-form-newsletter-btn {
  padding: 11px 24px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6, #6366f1);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: filter .25s ease;
}
.radikalwp-form-newsletter-btn:hover { filter: brightness(1.1); }
.radikalwp-form-newsletter-note {
  margin: 10px 4px 0;
  font-size: 11px;
  line-height: 1.8;
  color: #94a3b8;
}
@media (max-width: 400px) {
  .radikalwp-form-newsletter-row { flex-direction: column; }
  .radikalwp-form-newsletter-btn { width: 100%; }
}