html,
body {
  height: 100%;
}
body {
  margin: 0;
  color: #fff;
  /*
  background: #00202e;
  animation: animation60 40s infinite linear;
  */
  background: rgb(0,0,0);
  background: linear-gradient(0deg, rgba(0,0,0,1) 0%, rgba(51,51,51,1) 100%);
  font-family: Arial, Helvetica, sans-serif;
}
h1 {
  margin: 10px 0 20px 0;
  color: #999;
  font-size: 2.8rem;
  font-weight: normal;
}
a {
  display: inline-block;
  margin: 0 5px;
  padding: 5px;
  width: 100px;
  color: #333;
  background-color: #ccc;
  letter-spacing: 1px;
  text-decoration: none;
}
a:hover {
  background-color: #fff;
}
.flex-container {
  height: 90%;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.row {
  padding: 30px;
  width: auto;
  background-color: #000;
  text-align: center;
}
.row figure {
  display: block;
  margin: 0;
}
.row figure img {
  width: 120px;
  height: auto;
}
@media (max-width: 640px) {
  .row figure img {
    width: 100px;
  }  
  h1 {
    font-size: 1.8rem;
  }
}
@keyframes animation60 {
  0%   { background: #00202e; }
  20%  { background: #003f5c; }
  40%  { background: #2c4875; }
  60%  { background: #2c4875; }
  80%  { background: #003f5c; }
  100% { background: #00202e; }
}