.sv-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 9999;
}

.sv-modal-box {
  background: #fff;
  width: 90%;
  max-width: 420px;
  margin: 12% auto;
  padding: 30px;
  text-align: center;
  font-family: inherit;
}

.sv-modal-box input {
  width: 100%;
  padding: 10px;
  margin: 15px 0;
}

.sv-modal-box button {
  padding: 10px 20px;
  cursor: pointer;
}