style.css

@import url("https://fonts.googleapis.com/css?family=Montserrat:400,400i,700");

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: Montserrat, sans-serif;
}
.wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  min-height: 100vh;
}
h1,
#restart,
#match {
  text-align: center;
  padding: 20px;
}
#match {
  font-size: 2rem;
}
span {
  text-transform: uppercase;
  font-style: italic;
  border-bottom: medium dashed;
}
.boxes {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-evenly;
}
#first,
#second,
#third {
  height: 200px;
  width: 200px;
  border-radius: 20px 5px;
  margin: 10px;
  cursor: pointer;
  box-shadow: 3px 8px 8px 1px #bfc9ca;
}

.myButton {
  background-color: #1c2833;

  border-radius: 5px 20px;
  display: inline-block;
  cursor: pointer;
  color: #ffffff;
  font-family: Arial;
  font-size: 20px;
  border: none;
  padding: 16px 42px;
  text-decoration: none;
  box-shadow: 2px 5px 8px 1px #888888;
}

.myButton:active {
  position: relative;
  top: 1px;
}
.myButton:focus {
  outline: none;
}
#result {
  visibility: hidden;
  min-width: 250px;
  margin-left: -125px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 2px;
  padding: 16px;
  position: fixed;
  z-index: 1;
  left: 45%;
  bottom: 30px;
}

/* Show the snackbar when clicking on a button (class added with JavaScript) */
#result.show {
  visibility: visible;
  transform: all 0.5s;
  animation: fadein 0.5s, fadeout 0.5s 2.8s;
}

@keyframes fadein {
  from {
    bottom: 0;
    opacity: 0;
  }
  to {
    bottom: 30px;
    opacity: 1;
  }
}

@keyframes fadeout {
  from {
    bottom: 30px;
    opacity: 1;
  }
  to {
    bottom: 0;
    opacity: 0;
  }
}