style.css

body {
  background: #2c3e50;
}

.card{
  height: 96px;
  width: 72px;
  float: left;
  margin-left: 10%;
  margin-bottom: 10px;
  box-shadow: 5px 5px;

}

button {
  padding: 10px;
  font-family: arial;
  font-size: 2em;
  background: #16a085;
  font-weight: 800;
  border: none;
  outline: none;
  margin: 20px auto;
  display: block;
  border-radius: 10px
}

button:hover {
  padding: 15px;
  border: 2px lightblue solid
}