<div class="radikalwp-mini-contact"><h4>پیام بگذارید<//h4><input type="text" placeholder="نام شما"><textarea rows="3" placeholder="متن پیام…"><//textarea><button type="button">ارسال پیام<//button><//div>

.radikalwp-mini-contact {
  width: 320px;
  padding: 22px;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
}
.radikalwp-mini-contact h4 { margin: 0 0 14px; font-size: 15.5px; color: #0f172a; }
.radikalwp-mini-contact input,
.radikalwp-mini-contact textarea {
  width: 100%;
  margin-bottom: 11px;
  padding: 11px 13px;
  font-family: inherit;
  font-size: 13px;
  color: #0f172a;
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 11px;
  outline: none;
  box-sizing: border-box;
  resize: vertical;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.radikalwp-mini-contact textarea { min-height: 86px; line-height: 2; }
.radikalwp-mini-contact input:focus,
.radikalwp-mini-contact textarea:focus {
  border-color: #14b8a6;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(20, 184, 166, .14);
}
.radikalwp-mini-contact button {
  width: 100%;
  padding: 12px 0;
  font-family: inherit;
  font-size: 14px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #14b8a6, #0d9488);
  border: none;
  border-radius: 11px;
  cursor: pointer;
  transition: filter .2s ease;
}
.radikalwp-mini-contact button:hover { filter: brightness(1.08); }