* {
  box-sizing: border-box;
  margin: 0; 
  padding: 0; 
}

body {
  background-image: url("stars1.gif");
}

h1 {
  padding: 0px;
  margin: 0px;
}

h2 {
  padding: 0px;
  color: #35b037;
  text-shadow: 0px 0px 5px #35b037;
  
}

.header {
  background-color: #000000;
  text-align: center;
  padding: 0px;
  margin: 0px;
  color: #35b037;
  border-top: ridge #35b037;
  border-bottom: ridge #35b037;
  font-family: courier;
  text-shadow: 0px 0px 5px #35b037;
  font-size: 25px;
  width: 100%;
  float: right;
}

.sidebar {
  background-color: #000000;
  color: #b8b8b8;
  font-family: courier;
  text-align: center;
  border-right: 5px ridge #35b037;
  height: 100%;
  width: 25%;
  box-sizing: border-box;
  float: left;
  margin: auto;
  top: 0px;
  left: 0px;
  padding: 15px;
  overflow: hidden;
  position: fixed;
}

.sidebar a {
  color: #41bf2e;
}

.sidebar a:hover {
  color: #1d78e0;
}

.content {
  background-color: #000000;
  color: #b8b8b8;
  font-family: courier;
  text-align: center;
  border: 5px ridge #35b037;
  width: 600px;
  height: 100%;
  margin-top: 25px;
  margin-bottom: 50px;
  margin-left: 600px;
  margin-right: 600px;
  padding: 15px;
  position: relative;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

.blink {
                animation: blinker 3s linear infinite;
                color: #41bf2e;
                font-family: courier;
            }
            @keyframes blinker {
                50% {
                    opacity: 0;
                }
            }