body, input, button {
  font-family: 'Times New Roman', Times, serif;
  font-size: 20px;
  color: #333;
}

body {
  height: 100dvh;
  background-image: url(design-concept.png);
  background-size: cover;
  background-position: center;
  margin: 0;
}

body::after {
  content: '';
  position: absolute;
  width: 100vw;
  height: 100vh;
  backdrop-filter: blur(10px);
  inset: 0;
}

main {
  text-align: center;
  width: 100vmin;
  height: 100vmin;
  position: fixed;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  background-image: url(design-concept.png);
  background-size: contain;
  z-index: 2;
}

h1 {
  margin: 100px auto;
  position: relative;
  font-size: 0;
  width: 1px;
  height: 1px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  position: absolute;
  top: 60%;
  left: 50%;
  translate: -49% -50%;
  background-color: #fee9;
  padding: 40px;
}

input {
  text-align: center;
  background-color: #fee9;
  width: 6em;
}

output {
  display: block;
  height: 20px;
}