CSS3 Hover Link Effect - @keyframes

Uses @keyframes to animate border on hover

by Dan Wright

HTML

<nav>
    <a href="demo1.html" class="demo-4">
      <span>
        <span>Demo 1</span>
        <span>Hover</span>
        <span></span>
      </span>
    </a>
 
    <a href="demo2.html" class="demo-4">
      <span>
        <span>Demo 2</span>
        <span>Hover</span>
        <span></span>
      </span>
    </a>
 
    <a href="demo3.html" class="demo-4">
      <span>
        <span>Demo 3</span>
        <span>Hover</span>
        <span></span>
      </span>
    </a>
 
    <a href="demo4.html" class="demo-4">
      <span>
        <span>Demo 4</span>
        <span>Hover</span>
        <span></span>
      </span>
    </a>
 
  </nav>

CSS

.demo-4 {
  width: 210px;
  background-color: transparent;
  cursor: pointer;
  border-color: #bdc3c7;
}
 
.demo-4:hover {
  border-color: #C672E9;
}
 
.demo-4 span:nth-child(1) {
  color: #000000;
}
 
.demo-4 span:nth-child(2) {
  color: #C672E9;
}
 
.demo-4 span {
  font-family: 'Lato', sans-serif;
  font-size: 28px;
  letter-spacing: 3px;
}
 
.demo-4 {
  position: relative;
  box-sizing: border-box;
  padding: 0;
  border-style: none;
  height: 65px;
  display: inline-block;
}
 
.demo-4 span {
  position: absolute;
  box-sizing: border-box;
  display: block;
}

.demo-4>span>span:nth-child(3), .demo-4:before, .demo-4:after, .demo-4>:first-child, .demo-4>:first-child:before, .demo-4>:first-child:after {
  border-color: inherit;
  display: block;
  -moz-transition: border-color 0.3s ease;
  -webkit-transition: border-color 0.3s ease;
  transition: border-color 0.3s ease;
}
 
.demo-4:before, .demo-4:after, .demo-4>:first-child:before, .demo-4>:first-child:after {
  -webkit-animation-duration: 0.3s;
  animation-duration: 0.3s;
  position: absolute;
  box-sizing: border-box;
  content: ' ';
}
 
.demo-4>span>span:nth-child(3), .demo-4:before, .demo-4:after, .demo-4>:first-child:before, .demo-4>:first-child:after {
  border-width: 3px;
}
.demo-4>span>span:nth-child(3) {
  border-radius: 3px;
}
.demo-4:before {
  border-radius: 3px 0 0 3px;
}
.demo-4:after {
  border-radius: 0 3px 3px 0;
}
.demo-4>:first-child:before {
  border-radius: 3px 3px 0 0;
}
.demo-4>:first-child:after {
  border-radius: 0 0 3px 3px;
}
 
.demo-4>:first-child {
  top: 0;
  left: 0;
  width: inherit;
  height: inherit;
}
.demo-4>span span {
  width: inherit;
  text-align: center;
  -moz-transition: opacity 0.6s ease, top 0.5s ease;
  -webkit-transition: opacity 0.6s ease, top 0.5s ease;
  transition: opacity 0.6s ease, top 0.5s ease;
}
.demo-4>span>span:nth-child(1) {
  opacity: 1;
  top: 18px;
}
.demo-4>span>span:nth-child(2) {
  top: 37px;
  opacity: 0;
}
.demo-4:hover>span>span:nth-child(1) {
...