Webleb - fragmentos de código - Enlace animado al pasar el mouse

@import url(http://fonts.googleapis.com/css?family=Lato:100,400,900);

a {
    -moz-transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    -o-transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    -webkit-transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    white-space: nowrap;
    font-family: "Lato";
    font-weight: 900;
    font-size: 32px;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-decoration: none;
    color: #ff4851;
    position: absolute;
    top: 50%;
    left: 50%;
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

a:after {
    content: attr(href);
    -moz-transition: all 0s linear;
    -o-transition: all 0s linear;
    -webkit-transition: all 0s linear;
    transition: all 0s linear;
    overflow: hidden;
    background-color: #ff4851;
    text-transform: lowercase;
    position: absolute;
    font-size: 10px;
    letter-spacing: 0;
    font-weight: 500;
    bottom: -8px;
    left: 0;
    width: 100%;
    display: inline-block;
    -moz-transform: translate(-15px, 100%);
    -ms-transform: translate(-15px, 100%);
    -webkit-transform: translate(-15px, 100%);
    transform: translate(-15px, 100%);
    padding: 0 15px;
    max-height: 0;
    z-index: -1;
}

a:before {
    content: "";
    -moz-backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -moz-transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    -o-transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    -webkit-transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    transition: all 0.15s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: #ff4851;
    bottom: -5px;
    z-index: -2;
}

a:hover {
    color: white;
}

a:hover:before {
    padding: 10px 15px;
    margin-left: -15px;
    bottom: -10px;
    height: 100%;
}

a:hover:after {
    -moz-transition: all 0.25s cubic-bezier(0.46, 0.01, 0.14, 1.35) 0.3s;
    -o-transition: all 0.25s cubic-bezier(0.46, 0.01, 0.14, 1.35) 0.3s;
    -webkit-transition: all 0.25s cubic-bezier(0.46, 0.01, 0.14, 1.35);
    -webkit-transition-delay: 0.3s;
    transition: all 0.25s cubic-bezier(0.46, 0.01, 0.14, 1.35) 0.3s;
    -moz-transform: translate(-15px, 50%);
    -ms-transform: translate(-15px, 50%);
    -webkit-transform: translate(-15px, 50%);
    transform: translate(-15px, 50%);
    padding: 10px 15px;
    max-height: 30px;
    opacity: 1;
}

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HTML

CSS

@import url(http://fonts.googleapis.com/css?family=Lato:100,400,900);

a:hover {
    color: white;
}

a:hover:before {
    padding: 10px 15px;
    margin-left: -15px;
    bottom: -10px;
    height: 100%;
}