* {
  padding: 0;
  margin: 0;
  box-sizing:border-box;
}

body {
  background-color: #e6f6ff;

}

main {
  background-color: #fff;
  width: 320px;
  margin: 30px auto;
  text-align: center;
  padding: 16px;
}

main p {
  background-color: #ccc;
  padding: 32px 0;
  font-family: 'Courier New', Courier, monospace;
  font-size: 36px;
}

main button {
  all: unset;
  width: 100%;
  padding: 20px 0;
  margin: 16px 0 0;
  color: #fff;
  font-size: 20px;
  font-weight: bold;
  background-color:#08c;
  cursor: pointer;
}

main button:hover { 
  opacity: 0.8;
}

main button.active {
  cursor: default;
  color: #444;
  background-color: #ddd;
}

main button.active:hover {
  opacity: 1;
}

main button:active { 
  opacity: 0.5;
}