body {
  background-image: url('/img/bg_block.png');
}

.center-box {
  position: absolute;
  top: 100px;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 99;
  margin: auto;
  max-height: fit-content;
  max-width: 450px;
  border: 1px solid #dadce0;
  background-color: white;
  border-radius: 8px;
  padding: 50px;
}

@media screen and (max-width: 600px) {
  .center-box {
    border: 0px solid #dadce0;
    top: 0;
    max-width: 100%;
  }
}

@media screen and (max-height: 700px) {
  .center-box {
    top: 0;
  }
}