diff --git a/css/style.css b/css/style.css
index 3f1bbe0..3f554c0 100644
--- a/css/style.css
+++ b/css/style.css
@@ -1834,3 +1834,181 @@
 .closebtn:hover {
     color: black;
 } 
+
+.vcenter {
+  display: inline-block;
+  position: absolute;
+  left: 50%;
+  top: 50%;
+  -webkit-transform: translate(-50%, -50%);
+  transform: translate(-50%, -50%);
+} 
+
+.animation {
+  display: inline-block;
+  position: relative;
+  width: 378px;
+  height: 290px;
+  margin: 0 auto;
+  vertical-align: middle;
+}
+.animation .device {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  left: 50%;
+  top: 50%;
+  background: #111;
+  -webkit-transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
+  -moz-transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
+  -ms-transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
+  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
+  -moz-transform: translate(-50%, -50%);
+  -ms-transform: translate(-50%, -50%);
+  -webkit-transform: translate(-50%, -50%);
+  transform: translate(-50%, -50%);
+}
+.animation .device .phone-home-button,
+.animation .device .tablet-home-button {
+  position: absolute;
+  border-radius: 50%;
+  background: #444;
+  opacity: 0;
+  z-index: 1;
+  -webkit-transition: all 0.4s ease;
+  -moz-transition: all 0.4s ease;
+  -ms-transition: all 0.4s ease;
+  transition: all 0.4s ease;
+}
+.animation .device .phone-home-button {
+  width: 16px;
+  height: 16px;
+  margin-top: -8px;
+  right: 11px;
+  top: 50%;
+}
+.animation .device .tablet-home-button {
+  width: 12px;
+  height: 12px;
+  margin-left: -6px;
+  bottom: 7px;
+  left: 50%;
+}
+.animation .device .screen-stand {
+  position: absolute;
+  width: 100%;
+  margin-left: -10px;
+  margin-top: -1px;
+  top: 60%;
+  opacity: 0;
+  z-index: 1;
+  -webkit-transition: all 0.4s ease-out;
+  -moz-transition: all 0.4s ease-out;
+  -ms-transition: all 0.4s ease-out;
+  transition: all 0.4s ease-out;
+}
+.animation .device .screen-stand .leg {
+  position: absolute;
+  width: 12px;
+  height: 16px;
+  left: 50%;
+  top: 0;
+  margin-left: -6px;
+  background: #111;
+}
+.animation .device .screen-stand .foot {
+  position: absolute;
+  width: 120px;
+  height: 4px;
+  left: 50%;
+  top: 15px;
+  margin-left: -60px;
+  border-top-left-radius: 2px;
+  border-top-right-radius: 2px;
+  background: #111;
+}
+.animation .device .display {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+  background: #34495e;
+  z-index: 3;
+}
+.animation .device .display div {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  left: 100%;
+  white-space: nowrap;
+  -webkit-transition: all 0.4s ease;
+  -moz-transition: all 0.4s ease;
+  -ms-transition: all 0.4s ease;
+  transition: all 0.4s ease;
+}
+.animation .device .display div div {
+  position: absolute;
+  width: 100%;
+  left: 0;
+  top: 50%;
+  margin-top: -14px;
+  font-size: 1.1em;
+  text-align: center;
+  color: #fff;
+}
+.animation .device .display div div em {
+  font-weight: bold;
+}
+.animation .device .display .slide1 {
+  background: #34495e;
+}
+.animation .device .display .slide2 {
+  background: #16a085;
+}
+.animation .device .display .slide3 {
+  background: #3498db;
+}
+.animation[data-animation-step="1"] .device {
+  width: 70%;
+  height: 70%;
+  padding: 10px;
+  border-radius: 4px;
+}
+.animation[data-animation-step="1"] .device .slide1 {
+  left: 0%;
+}
+.animation[data-animation-step="1"] .device .screen-stand {
+  opacity: 1;
+  top: 100%;
+}
+.animation[data-animation-step="2"] .device {
+  width: 45%;
+  height: 82%;
+  padding: 24px;
+  border-radius: 10px;
+}
+.animation[data-animation-step="2"] .device .slide1 {
+  left: -100%;
+}
+.animation[data-animation-step="2"] .device .slide2 {
+  left: 0%;
+}
+.animation[data-animation-step="2"] .device .tablet-home-button {
+  opacity: 1;
+}
+.animation[data-animation-step="3"] .device {
+  width: 60%;
+  height: 42%;
+  padding: 10px 36px;
+  border-radius: 6px;
+}
+.animation[data-animation-step="3"] .device .slide1,
+.animation[data-animation-step="3"] .device .slide2 {
+  left: -100%;
+}
+.animation[data-animation-step="3"] .device .slide3 {
+  left: 0%;
+}
+.animation[data-animation-step="3"] .device .phone-home-button {
+  opacity: 1;
+}