HTMLify

* {
  left: 0;
  top: 0;
}

body {
  display: grid;
  place-items: center;
}

.container {
  display: grid;
  place-items: center;
  background: white;
  width: 98vw;
  height: 80vh;
}

#box {
  background: #fff;
  max-width: 80%;
  height: 20rem;
  box-shadow: 5px 10px 10px 2px #333;
  margin-bottom: 10%;
  border-radius: 10px;
}

#css-code {
  width: 40%;
  padding: 10px;
  border-radius: 0;
  margin-top: 20px;
  border: none;
  border-bottom: 1px solid;
}

#shadowcolor {
  width: 70%;
  border: none;
  margin-top: 20px;
}

#copy {
  background: transparent;
  border: none;
  border: 1px solid black;
  padding: 10px 20px;
  cursor: pointer;
  font-weight: bold;
  transition: 0.5s ease;
}

#copy:hover {
  background-color: crimson;
  color: #fff;
  border: none;
}