html {
  color: #999;
  letter-spacing: 2px;
  text-align: center;
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

body {
  background-color: #333;
}

h1 {
  font-size: 40px;
}

.container {
  display: grid;
  grid-template-rows: repeat(10, auto);
  grid-gap: 5px;
  margin: 0 auto;
  width: 70%;
}

input {
  background-color: #999;
  color: #333;
  font-size: 18px;
  padding: 15px;
  display: block;
  width: 400px;
  border: none;
  border-radius: 10px;
  border-bottom: 1px solid #999;
  margin: 30px auto;
  text-align: center;
  box-shadow: 3px 3px 8px #111, -3px -3px 8px #999,
              inset 2px 2px 4px #333, inset -2px -2px 4px #333;

}

input:focus {
  outline: none;
}

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

button {
  width: 200px;
  background-color: #333;
  color: #999;
  border-radius: 10px;
  padding: 15px;
  margin: 20px auto;
  font-size: 20px;
  cursor: pointer;
  border: none;
  box-shadow: 3px 3px 8px #000, -3px -3px 8px #999;
}

button:hover {
  color: #666;
  background-color: #333;
  box-shadow: 3px 3px 8px #000, -3px -3px 8px #999,
              inset 3px 3px 8px #000, inset -3px -3px 8px #999;
  transition: ease-in-out 0.25s;
}

.lucky-btn {
  background-color: #A491D3;
  color: white;
}