style.css

* {
  padding: 0;
  margin: 0;
  font-family: "sans";
  user-select: none;
}

@font-face {
  src: url("font/sans.ttf");
  font-family: "sans";
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #19172e;
}

h2 {
  position: absolute;
  top: 0;
  padding-top: 180px;
  color: white;
  font-size: 2rem;
  text-align: center;
}

.inputBox {
  position: relative;
  width: 400px;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 15px 25px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  border-radius: 20px;
  backdrop-filter: blur(20px);
}

.inputBox input {
  position: relative;
  width: 100%;
  height: 60px;
  border: none;
  margin: 15px 0 15px;
  padding: 0 20px;
  font-size: 24px;
  letter-spacing: 3px;
  box-sizing: border-box;
  border-radius: 8px;
  color: white;
  text-align: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
}

::-webkit-input-placeholder {
  text-align: center;
}

#btn {
  position: absolute;
  cursor: pointer;
  color: #fff;
  background: #333;
  font-size: 24px;
  padding: 15px;
  border-radius: 8px;
  bottom: 0;
  margin: 200px auto;
}

#btn:active {
  background: #1e8e3e;
}

footer {
    text-align: center;
    color: white;
    font-size: 1rem;
    position: absolute;
    bottom: 0;
    margin-bottom: 0;
    padding: 5px;
    line-height: 3vh;
  }

  footer a:visited {
    color: inherit;
  }