.modal {
  display: none;
  position: fixed;
  z-index: 8000;
  left: 0; top: 0;
  width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.55);
  align-items: center; justify-content: center;
}
.modal.show {
  display: flex;
}
.modal-content {
  background: #fff;
  border-radius: 12px;
  padding: 34px 28px 24px 28px;
  max-width: 340px;
  box-shadow: 0 8px 40px rgba(44,62,80,0.08);
  text-align: center;
  position: relative;
}
.modal-content h3 {
  margin-top: 0;
}
.modal-content input[type="email"] {
  width: 92%;
  margin: 16px 0 20px 0;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #ececec;
}
.modal-content button[type="submit"] {
  background: #2c3e50;
  color: #fff;
  border: none;
  border-radius: 8px;
  width: 100%;
  height: 38px;
  cursor: pointer;
}
.close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  color: #444;
  cursor: pointer;
  border: none;
  background: none;
}