body {
  margin-left: 20%;
  margin-right: 20%;
  margin-top: 10%;
  background-color: aquamarine;
  font: 30px "Lucida Grande", Helvetica, Arial, sans-serif;
}

button {
  font: 30px "Lucida Grande", Helvetica, Arial, sans-serif;
  display: block;
  margin: 5px auto;
  width: 50%;
  color: white;
  background-color: dodgerblue;
  border: none;
  border-radius: 5px;
}

button:active {
  background-color: green;
}

progress {
  margin-top: 5%;
  margin-bottom: 5%;
  border-radius: 10px;
  width: 80%;
  height: 20px;
  box-shadow: 1px 1px 4px rgba( 0, 0, 0, 0.2 );
}
progress::-webkit-progress-bar {
  background-color: grey;
  border-radius: 10px;
}
progress::-webkit-progress-value {
  background-color: blue;
  border-radius: 10px;
}
progress::-moz-progress-bar {
  /* style rules */
}

.card {
  border: darkblue;
  border-style: solid;
  border-radius: 30px;
  border-width: 20px;
  background-color: aliceblue;
  text-align: center;
}

a {
  color: #00B7FF;
}