styles.css

body {
  background: black;
}

.container {
  width: 600px;
  height: 800px;
  margin-top: 60px !important;
  background: white;
  border: 5px double rebeccapurple;
}

#introText {
  font-family: "Satisfy", serif;
  text-align: center;
  color: rebeccapurple;
  letter-spacing: .1rem;
  margin-top: 20px;
  padding-top: 22px;
}
.start {
  margin: 0px 245px 10px 405px;
}

.gameChoices{
  margin: 60px 245px 10px 360px;
}

.diamond-grid {
  margin: 40px 0 10px 105px;
}

ul li {
  list-style: none;
  float: left;
  margin-left: 66px;
  margin-top: 20px;
}

/* Base Code for the overall diamond shape via:  */

.diamonds {
  height: 160px;
  width: 160px;
  background: transparent;
  color: #fff;
  display: block;
  overflow: hidden;
  position: relative;
  text-decoration: none;
  border: 3px solid #fff;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}

.diamonds img {
  /*visibility: hidden;*/
}

.dia1 {
  background: #990069;
  /*background: white;*/

}

.dia2 {
  background: #b1ff00;
}

.dia3{
  background: #00d0ca;
}

.dia4 {
  background: #038057;
  margin-top: 0;
  margin-left: 186px;
}
.dia5 {
  background: #ff4400;
  margin-left: 70px;
  margin-top: 0;
}