styles.css

body {
  margin: 0;
  padding: 0;
}

#particles-js {
  background-color: #cdffeb;
  background-size: cover;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  z-index: -1;
  height: 100%;
}

#container {
  text-align: center;
  font-family: "Raleway";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -webkit-animation: fadein 2s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadein 2s; /* Firefox < 16 */
        -ms-animation: fadein 2s; /* Internet Explorer */
         -o-animation: fadein 2s; /* Opera < 12.1 */
            animation: fadein 2s;
}

#title {
  color: #009f9d;
  font-size: 12vh;
  padding-bottom: 15px;
}

.accent {
  color: #07456f;
}

#description {
  color: #009f9d;
  font-size:4vh;
  padding-top: 20px;
  padding-bottom: 15px;
}

.button {
    background-color: transparent;
    border-style: solid;
    border-width: 2px;
    color: #07456f;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 5px;
    margin-bottom: 25px;
}

.gamebutton {
    background-color: transparent;
    border-style: solid;
    border-width: 2px;
    color: #07456f;
    padding: 8px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 5px;
    margin-bottom: 25px;
}

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

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}