* {
  box-sizing: border-box;
}
body {
  /*background-image: linear-gradient(#eacda3, #d6ae7b);*/
  background-color: #eacda3;
  margin: 0;
}

/* Style the header */
.header {
  /*background-image: linear-gradient(#eacda3, #d6ae7b);*/
  background-color: #eacda3;
  padding: 20px;
  font-family: "Times New Roman", "Times", "serif";  
  text-align: left;
}

.header h1 {
  font-size: 50px;
  color: white;
  text-shadow: 1px 1px 2px black, 0 0 25px yellow, 0 0 5px teal;
}

/* Style Vertical Navigation */
#NavUl {  
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #f1f1f1;
  position: -webkit-sticky; /* Safari */
  position: sticky;
  top: 0;
}

.NavLi {
  float: left;
}

.NavLi a {
  display: block;
  color: #000;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.NavLi a.active {
  background-color: #4CAF50;
  color: white;
}

.NavLi a:hover:not(.active) {
  background-color: #555;
  color: white;
}

h1 {
  color:blue;
}

h2 {
  color: green;
}

.div1 {
  height:150px;
  width:75px;
  animation-name: example;
  animation-duration: 4s;
}

@-webkit-keyframes example {
  from {
  background:url("Card_back.png");
  background-repeat: no-repeat;
  background-size: contain;
}
  to {
  background:url("10C.png");
  background-repeat: no-repeat;
  background-size: contain;
}
}

/* Standard syntax */
@keyframes example {
  from {
  background:url("Card_back.png");
  background-repeat: no-repeat;
  background-size: contain;
}
  to {
  background:url("10C.png");
  background-repeat: no-repeat;
  background-size: contain;
}
}



.column.side ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 100%;
  background-color: #f1f1f1;
  height: auto;
  overflow: auto;
}

.column.side li a {
  display: block;
  color: #000;
  padding: 8px 16px;
  text-decoration: none;
}

.column.side li a.active {
  background-color: #4CAF50;
  color: white;
}

.column.side li a:hover:not(.active) {
  background-color: #555;
  color: white;
}

/* Create three unequal columns that floats next to each other */
.column {
  float: left;
  padding: 10px;
}

/* Left and right column */
.column.side {
  background-color: #eacda3;
  width: 15%;
}



/* Middle column */
.column.middle {
  background-color: #eacda3;
  width: 85%;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

@media screen and (max-width: 600px) {
  .column.side, .column.middle {
    width: 100%;
  }
}