index.css

body {
  padding: 10px;
}

.title {
  text-align: center;
}

.button {
  text-align: center;
  margin-bottom: 20px;
}

.button a.button {
  display: inline-block;
  padding: 12px 30px;
  margin-right: 14px;
  font-size: 15px;
  text-decoration: none;
  font-weight: bold;
  line-height: 25px;
  color: #303030;
  background: #fdfdfd;
  background: -moz-linear-gradient(top, #fdfdfd 0%, #f2f2f2 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fdfdfd), color-stop(100%, #f2f2f2));
  background: -webkit-linear-gradient(top, #fdfdfd 0%, #f2f2f2 100%);
  background: -o-linear-gradient(top, #fdfdfd 0%, #f2f2f2 100%);
  background: -ms-linear-gradient(top, #fdfdfd 0%, #f2f2f2 100%);
  background: linear-gradient(top, #fdfdfd 0%, #f2f2f2 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#fdfdfd', endColorstr='#f2f2f2', GradientType=0);
  border-top: solid 1px #cbcbcb;
  border-right: solid 1px #b7b7b7;
  border-bottom: solid 1px #b3b3b3;
  border-left: solid 1px #b7b7b7;
  border-radius: 30px;
  -webkit-box-shadow: 10px 10px 5px #888;
  -moz-box-shadow: 10px 10px 5px #888;
  box-shadow: 0px 1px 5px #e8e8e8;
  -moz-border-radius: 30px;
  -webkit-border-radius: 30px;
}

#home span {
  background: transparent url(https://avatars0.githubusercontent.com/u/9951055) 1px 50% no-repeat;
  background-size: 20px;
}

#view-on-github span {
  background: transparent url(https://phe0nix.github.io/assets/images/octocat-icon.png) 0 50% no-repeat;
}

a.button span {
  display: block;
  height: 23px;
  padding-left: 35px;
}

#space {
  width: 100%;
  height: 100%;
  margin-top: 20px;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  border-radius: 10px;
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.5);
}

.demo {
  background: lightskyblue;
  color: black;
  outline: none;
  border: 0px;
  box-shadow: 2px 2px 10px #555;
  margin: 0px;
  padding-top: 30px !important;
  padding: 6px;
  font-family: Helvetica;
}

.div {
  display: inline-flex;
  margin: 6px 8px 6px 8px;
  position: relative;
}

.heading {
  position: absolute;
  background: #6fb6e2;
  font-weight: 600;
  padding: 2px;
  left: 0;
  right: 0;
  border-bottom: 1px solid #333;
}

button.close {
  border-radius: 50px;
  background: #39464e;
  color: #e6e9eb;
  border: 2px solid #39464e;
  cursor: pointer;
  outline: 0px;
  padding: 9px 4px;
  line-height: 0;
  opacity: 1;
  font-weight: 400;
  text-shadow: none;
  font-size: 15px;
}

.close:focus, .close:hover {
  background: #dc4141;
  border: 2px solid #dc4141;
  opacity: 1;
}