Cách tạo hiệu ứng hover cho button cực đẹp với CSS3

Demo  

1. Code HTML

Đầu tiên, chúng ta cần có khung chuẩn html như sau:

<section class="buttons">
     <div class="container">
          <h1>Button Hover Effects</h1>
          <a href="https://twitter.com/thecntech" class="btn btn-1">
               <svg><rect x="0" y="0" fill="none" width="100%" height="100%"/></svg>
          Hover
          </a>
 <!--End of Button 1 -->
          <a href="https://twitter.com/thecntech" class="btn btn-2">Hover</a>
 <!--End of Button 2 -->
          <a href="https://twitter.com/thecntech" class="btn btn-3">Hover</a>
 <!--End of Button 3 -->
          <a href="https://twitter.com/thecntech" class="btn btn-4"><span>Hover</span></a>
 <!--End of Button 4 -->
          <a href="https://twitter.com/thecntech" class="btn btn-5">Hover</a>
 <!--End of Button 5 -->
          <p>Follow on <a href="http://www.twitter.com/thecntech" target="_blank">Twitter</a></p>
     </div>
</section>

2. Code CSS

Và sau đây là toàn bộ đoạn css giúp các bạn tạo được hiệu ứng button:

@import url(http://fonts.googleapis.com/css?family=Roboto:400,100,900);
* {
     box-sizing: inherit;
     transition-property: all;
     transition-duration: .6s;
     transition-timing-function: ease;
}
html,
body {
     box-sizing: border-box;
     height: 100%;
     width: 100%;
}
body {
     background: #E1332D;
     font-family: 'Roboto', sans-serif;
     font-weight: 400;
}
.buttons {
     display: table;
     height: 100%;
     width: 100%;
}
.container {
     display: table-cell;
     padding: 1em;
     text-align: center;
     vertical-align: middle;
}
h1 {
     color: #fff;
     font-size: 1.25em;
     font-weight: 900;
     margin: 0 0 2em;
}
@media (min-width: 450px) {
 h1 {
     font-size: 1.75em;
 }
}
@media (min-width: 760px) {
 h1 {
     font-size: 3.25em;
 }
}
@media (min-width: 900px) {
 h1 {
     font-size: 5.25em;
     margin: 0 0 1em;
 }
}
p {
     color: #fff;
     font-size: 12px;
}
@media (min-width: 600px) {
 p {
     left: 50%;
     position: absolute;
     transform: translate(-50%, 0);
     top: 90%;
 }
}
@media (max-height: 500px) {
 p {
     left: 0;
     position: relative;
     top: 0;
 transform: translate(0, 0);
 }
}
p a {
     background: rgba(255, 255, 255, 0);
     border-bottom: 1px solid;
     color: #fff;
     line-height: 1.4;
     padding: .25em;
     text-decoration: none;
}
p a:hover {
     background: white;
     color: #E1332D;
}
.btn {
     color: #fff;
     cursor: pointer;
     display: block;
     font-size: 16px;
     font-weight: 400;
     line-height: 45px;
     margin: 0 auto 2em;
     max-width: 160px;
     position: relative;
     text-decoration: none;
     text-transform: uppercase;
     vertical-align: middle;
     width: 100%;
}
@media (min-width: 400px) {
 .btn {
     display: inline-block;
     margin-right: 2.5em;
 }
 .btn:nth-of-type(even) {
     margin-right: 0;
 }
}
@media (min-width: 600px) {
.btn:nth-of-type(even) {
     margin-right: 2.5em;
 }
 .btn:nth-of-type(5) {
     margin-right: 0;
 }
}
.btn:hover {
     text-decoration: none;
}
.btn-1 {
     background: #e02c26;
     font-weight: 100;
}
.btn-1 svg {
     height: 45px;
     left: 0;
     position: absolute;
     top: 0;
     width: 100%;
}
.btn-1 rect {
     fill: none;
     stroke: #fff;
     stroke-width: 1;
     stroke-dasharray: 422, 0;
}
.btn-1:hover {
     background: rgba(225, 51, 45, 0);
     font-weight: 900;
     letter-spacing: 1px;
}
.btn-1:hover rect {
     stroke-width: 5;
     stroke-dasharray: 15, 310;
     stroke-dashoffset: 48;
     transition: all 1.35s cubic-bezier(0.19, 1, 0.22, 1);
}
.btn-2 {
     letter-spacing: 0;
}
.btn-2:hover,
.btn-2:active {
     letter-spacing: 5px;
}
.btn-2:after,
.btn-2:before {
     backface-visibility: hidden;
     border: 1px solid rgba(255, 255, 255, 0);
     bottom: 0px;
     content: " ";
     display: block;
     margin: 0 auto;
     position: relative;
     transition: all 280ms ease-in-out;
     width: 0;
}
.btn-2:hover:after,
.btn-2:hover:before {
     backface-visibility: hidden;
     border-color: #fff;
     transition: width 350ms ease-in-out;
     width: 70%;
}
.btn-2:hover:before {
     bottom: auto;
     top: 0;
     width: 70%;
}
.btn-3 {
     background: #e3403a;
     border: 1px solid #da251f;
     box-shadow: 0px 2px 0 #d6251f, 2px 4px 6px #e02a24;
     font-weight: 900;
     letter-spacing: 1px;
     transition: all 150ms linear;
}
.btn-3:hover {
     background: #e02c26;
     border: 1px solid rgba(0, 0, 0, 0.05);
     box-shadow: 1px 1px 2px rgba(255, 255, 255, 0.2);
     color: #ec817d;
     text-decoration: none;
     text-shadow: -1px -1px 0 #c2211c;
     transition: all 250ms linear;
}
.btn-4 {
     border: 1px solid;
     overflow: hidden;
     position: relative;
}
.btn-4 span {
     z-index: 20;
}
.btn-4:after {
     background: #fff;
     content: "";
     height: 155px;
     left: -75px;
     opacity: .2;
     position: absolute;
     top: -50px;
     transform: rotate(35deg);
     transition: all 550ms cubic-bezier(0.19, 1, 0.22, 1);
     width: 50px;
     z-index: -10;
}
.btn-4:hover:after {
     left: 120%;
     transition: all 550ms cubic-bezier(0.19, 1, 0.22, 1);
}
.btn-5 {
     border: 0 solid;
     box-shadow: inset 0 0 20px rgba(255, 255, 255, 0);
     outline: 1px solid;
     outline-color: rgba(255, 255, 255, 0.5);
     outline-offset: 0px;
     text-shadow: none;
     transition: all 1250ms cubic-bezier(0.19, 1, 0.22, 1);
}
 
.btn-5:hover {
     border: 1px solid;
     box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.5), 0 0 20px rgba(255, 255, 255, 0.2);
     outline-color: rgba(255, 255, 255, 0);
     outline-offset: 15px;
     text-shadow: 1px 1px 2px #427388;
}