CodePen Embed - CSS3 Hover Effects

<div class="row">
    <div class="block">
        <i class="hovicon effect-1 sub-a">IO</i>
    </div>
    <div class="block">
        <i class="hovicon effect-1 sub-b">IO</i>
    </div>
    <div class="block">
        <i class="hovicon effect-2 sub-a">IO</i>
    </div>
    <div class="block">
        <i class="hovicon effect-2 sub-b">IO</i>
    </div>
</div>


<div class="row">
    <div class="block">
        <i class="hovicon effect-3 sub-a">IO</i>
    </div>
    <div class="block">
        <i class="hovicon effect-3 sub-b">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-4 sub-a">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-4 sub-b">IO</i>
    </div>
</div>


<div class="row">
    <div class="block">

        <i class="hovicon effect-5 sub-a">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-6">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-7 sub-a">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-7 sub-b">IO</i>
    </div>
</div>



<div class="row">
    <div class="block">

        <i class="hovicon effect-8">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-9 sub-a">IO</i>
    </div>
    <div class="block">

        <i class="hovicon effect-9 sub-b">IO</i>
    </div>
    <div class="block">
        <i class="hovicon effect-1 sub-a"><b class="icon-camera-retro"></b>
        </i>
    </div>
</div>
<link rel="stylesheet" type="text/css" href="https://netdna.bootstrapcdn.com/font-awesome/3.0.2/css/font-awesome.css" />

@import "compass/css3";

body {
    background: #292929;
    padding-left: 30px;
}
.row {
    float: left;
    width: 100%;
}
.row .block {
    float: left;
    width: 25%;
    height: 150px;
}
.hovicon {
    display: inline-block;
    font-size: 45px;
    line-height: 90px;
    cursor: pointer;
    margin: 20px;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    text-align: center;
    position: relative;
    text-decoration: none;
    z-index: 1;
    color: #fff;
}
.hovicon.small {
    font-size: 20px;
    line-height:45px;
    width:45px;
    height:45px;
    margin:7px;
}
.hovicon.mini {
    font-size: 15px;
    line-height:32px;
    width:30px;
    height:30px;
    margin:7px;
}
.hovicon.auto-width {
    width: auto;
    height: auto;
    padding: 15px;
}
.hovicon:after {
    pointer-events: none;
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    content:'';
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    box-sizing: content-box;
}
.hovicon:before {
    speak: none;
    font-size: 48px;
    line-height: 90px;
    font-style: normal;
    font-weight: normal;
    font-variant: normal;
    text-transform: none;
    display: block;
    -webkit-font-smoothing: antialiased;
}
/* Effect 1 */
 .hovicon.effect-1 {
    background: rgba(255, 255, 255, 0.1);
    -webkit-transition: background 0.2s, color 0.2s;
    -moz-transition: background 0.2s, color 0.2s;
    transition: background 0.2s, color 0.2s;
}
.hovicon.effect-1:after {
    top: -7px;
    left: -7px;
    padding: 7px;
    box-shadow: 0 0 0 4px #fff;
    -webkit-transition: -webkit-transform 0.2s, opacity 0.2s;
    -webkit-transform: scale(.8);
    -moz-transition: -moz-transform 0.2s, opacity 0.2s;
    -moz-transform: scale(.8);
    -ms-transform: scale(.8);
    transition: transform 0.2s, opacity 0.2s;
    transform: scale(.8);
    opacity: 0;
}
/* Effect 1a */
 .hovicon.effect-1.sub-a:hover {
    background: rgba(255, 255, 255, 1);
    color: #41ab6b;
}
.hovicon.effect-1.sub-a:hover i {
    color: #41ab6b;
}
.hovicon.effect-1.sub-a:hover:after {
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
    opacity: 1;
}
/* Effect 1b */
 .hovicon.effect-1.sub-b:hover {
    background: rgba(255, 255, 255, 1);
    color: #41ab6b;
}
.hovicon.effect-1.sub-b:hover i {
    color: #41ab6b;
}
.hovicon.effect-1.sub-b:after {
    -webkit-transform: scale(1.2);
    -moz-transform: scale(1.2);
    -ms-transform: scale(1.2);
    transform: scale(1.2);
}
.hovicon.effect-1.sub-b:hover:after {
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
    opacity: 1;
}
/* Effect 2 */
 .hovicon.effect-2 {
    color: #eea303;
    box-shadow: 0 0 0 3px #fff;
    -webkit-transition: color 0.3s;
    -moz-transition: color 0.3s;
    transition: color 0.3s;
}
.hovicon.effect-2:after {
    top: -2px;
    left: -2px;
    padding: 2px;
    z-index: -1;
    background: #fff;
    -webkit-transition: -webkit-transform 0.2s, opacity 0.2s;
    -moz-transition: -moz-transform 0.2s, opacity 0.2s;
    transition: transform 0.2s, opacity 0.2s;
}
/* Effect 2a */
 .hovicon.effect-2.sub-a:hover, .hovicon.effect-2.sub-a:hover i {
    color: #eea303;
}
.hovicon.effect-2.sub-a:hover:after {
    -webkit-transform: scale(0.85);
    -moz-transform: scale(0.85);
    -ms-transform: scale(0.85);
    transform: scale(0.85);
}
/* Effect 2b */
 .hovicon.effect-2.sub-b:hover:after {
    -webkit-transform: scale(0);
    -moz-transform: scale(0);
    -ms-transform: scale(0);
    transform: scale(0);
    opacity: 0;
    -webkit-transition: -webkit-transform 0.4s, opacity 0.2s;
    -moz-transition: -moz-transform 0.4s, opacity 0.2s;
    transition: transform 0.4s, opacity 0.2s;
}
.hovicon.effect-2.sub-b:hover, .hovicon.effect-2.sub-b:hover i {
    color: #fff;
}
/* Effect 3 */
 .hovicon.effect-3 {
    box-shadow: 0 0 0 4px #fff;
    -webkit-transition: color 0.3s;
    -moz-transition: color 0.3s;
    transition: color 0.3s;
}
.hovicon.effect-3:after {
    top: -2px;
    left: -2px;
    padding: 2px;
    z-index: -1;
    background: #fff;
    -webkit-transition: -webkit-transform 0.2s, opacity 0.3s;
    -moz-transition: -moz-transform 0.2s, opacity 0.3s;
    transition: transform 0.2s, opacity 0.3s;
}
/* Effect 3a */
 .hovicon.effect-3.sub-a, .hovicon.effect-3.sub-a i {
    color: #f06060;
}
.hovicon.effect-3.sub-a:hover, .hovicon.effect-3.sub-a:hover i {
    color: #fff;
}
.hovicon.effect-3.sub-a:hover:after {
    -webkit-transform: scale(1.3);
    -moz-transform: scale(1.3);
    -ms-transform: scale(1.3);
    transform: scale(1.3);
    opacity: 0;
}
/* Effect 3b */
 .hovicon.effect-3.sub-b, .hovicon.effect-3.sub-b i {
    color: #fff;
}
.hovicon.effect-3.sub-b:hover, .hovicon.effect-3.sub-b:hover i {
    color: #f06060;
}
.hovicon.effect-3.sub-b:after {
    -webkit-transform: scale(1.3);
    -moz-transform: scale(1.3);
    -ms-transform: scale(1.3);
    transform: scale(1.3);
    opacity: 0;
}
.hovicon.effect-3.sub-b:hover:after {
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
    opacity: 1;
}
/* Effect 4 */
 .hovicon.effect-4 {
    width: 92px;
    height: 92px;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 1);
}
.hovicon.effect-4.small {
    width:45px;
    height:45px;
}
.hovicon.effect-4.mini {
    width:30px;
    height:30px;
}
.hovicon.effect-4.sub-a {
    -webkit-transition: box-shadow 0.2s;
    -moz-transition: box-shadow 0.2s;
    transition: box-shadow 0.2s;
}
.hovicon.effect-4:before {
    line-height: 92px;
}
.hovicon.effect-4:after {
    top: -4px;
    left: -4px;
    padding: 0;
    z-index: 10;
    border: 4px dashed #fff;
}
.hovicon.effect-4:hover {
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    color: #fff;
}
.hovicon.effect-4:hover i {
    color: #fff;
}
/* Effect 4b */
 .hovicon.effect-4.sub-b:hover {
    -webkit-transition: box-shadow 0.2s;
    -moz-transition: box-shadow 0.2s;
    transition: box-shadow 0.2s;
}
.hovicon.effect-4.sub-b:hover:after {
    -webkit-animation: spinAround 9s linear infinite;
    -moz-animation: spinAround 9s linear infinite;
    animation: spinAround 9s linear infinite;
}
@-webkit-keyframes spinAround {
    from {
        -webkit-transform: rotate(0deg)
    }
    to {
        -webkit-transform: rotate(360deg);
    }
}
@-moz-keyframes spinAround {
    from {
        -moz-transform: rotate(0deg)
    }
    to {
        -moz-transform: rotate(360deg);
    }
}
@keyframes spinAround {
    from {
        transform: rotate(0deg)
    }
    to {
        transform: rotate(360deg);
    }
}
/* Effect 5 */
 .hovicon.effect-5 {
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 1);
    overflow: hidden;
    -webkit-transition: background 0.3s, color 0.3s, box-shadow 0.3s;
    -moz-transition: background 0.3s, color 0.3s, box-shadow 0.3s;
    transition: background 0.3s, color 0.3s, box-shadow 0.3s;
}
.hovicon.effect-5:after {
    display: none;
}
.hovicon.effect-5:hover {
    background: rgba(255, 255, 255, 1);
    color: #702fa8;
    box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.3);
}
.hovicon.effect-5:hover i {
    color: #702fa8;
}
.hovicon.effect-5.sub-a:hover:before {
    -webkit-animation: toRightFromLeft 0.3s forwards;
    -moz-animation: toRightFromLeft 0.3s forwards;
    animation: toRightFromLeft 0.3s forwards;
}
@-webkit-keyframes toRightFromLeft {
    49% {
        -webkit-transform: translate(100%);
    }
    50% {
        opacity: 0;
        -webkit-transform: translate(-100%);
    }
    51% {
        opacity: 1;
    }
}
@-moz-keyframes toRightFromLeft {
    49% {
        -moz-transform: translate(100%);
    }
    50% {
        opacity: 0;
        -moz-transform: translate(-100%);
    }
    51% {
        opacity: 1;
    }
}
@keyframes toRightFromLeft {
    49% {
        transform: translate(100%);
    }
    50% {
        opacity: 0;
        transform: translate(-100%);
    }
    51% {
        opacity: 1;
    }
}
.hovicon.effect-5.sub-b:hover:before {
    -webkit-animation: toLeftFromRight 0.3s forwards;
    -moz-animation: toLeftFromRight 0.3s forwards;
    animation: toLeftFromRight 0.3s forwards;
}
@-webkit-keyframes toLeftFromRight {
    49% {
        -webkit-transform: translate(-100%);
    }
    50% {
        opacity: 0;
        -webkit-transform: translate(100%);
    }
    51% {
        opacity: 1;
    }
}
@-moz-keyframes toLeftFromRight {
    49% {
        -moz-transform: translate(-100%);
    }
    50% {
        opacity: 0;
        -moz-transform: translate(100%);
    }
    51% {
        opacity: 1;
    }
}
@keyframes toLeftFromRight {
    49% {
        transform: translate(-100%);
    }
    50% {
        opacity: 0;
        transform: translate(100%);
    }
    51% {
        opacity: 1;
    }
}
.hovicon.effect-5.sub-c:hover:before {
    -webkit-animation: toTopFromBottom 0.3s forwards;
    -moz-animation: toTopFromBottom 0.3s forwards;
    animation: toTopFromBottom 0.3s forwards;
}
@-webkit-keyframes toTopFromBottom {
    49% {
        -webkit-transform: translateY(-100%);
    }
    50% {
        opacity: 0;
        -webkit-transform: translateY(100%);
    }
    51% {
        opacity: 1;
    }
}
@-moz-keyframes toTopFromBottom {
    49% {
        -moz-transform: translateY(-100%);
    }
    50% {
        opacity: 0;
        -moz-transform: translateY(100%);
    }
    51% {
        opacity: 1;
    }
}
@keyframes toTopFromBottom {
    49% {
        transform: translateY(-100%);
    }
    50% {
        opacity: 0;
        transform: translateY(100%);
    }
    51% {
        opacity: 1;
    }
}
.hovicon.effect-5.sub-d:hover:before {
    -webkit-animation: toBottomFromTop 0.3s forwards;
    -moz-animation: toBottomFromTop 0.3s forwards;
    animation: toBottomFromTop 0.3s forwards;
}
@-webkit-keyframes toBottomFromTop {
    49% {
        -webkit-transform: translateY(100%);
    }
    50% {
        opacity: 0;
        -webkit-transform: translateY(-100%);
    }
    51% {
        opacity: 1;
    }
}
@-moz-keyframes toBottomFromTop {
    49% {
        -moz-transform: translateY(100%);
    }
    50% {
        opacity: 0;
        -moz-transform: translateY(-100%);
    }
    51% {
        opacity: 1;
    }
}
@keyframes toBottomFromTop {
    49% {
        transform: translateY(100%);
    }
    50% {
        opacity: 0;
        transform: translateY(-100%);
    }
    51% {
        opacity: 1;
    }
}
/* Effect 6 */
 .hovicon.effect-6 {
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 1);
    -webkit-transition: background 0.2s, color 0.2s;
    -moz-transition: background 0.2s, color 0.2s;
    transition: background 0.2s, color 0.2s;
}
.hovicon.effect-6:hover {
    background: rgba(255, 255, 255, 1);
    color: #64bb5d;
}
.hovicon.effect-6:hover i {
    color: #64bb5d;
}
.hovicon.effect-6:hover:before {
    -webkit-animation: spinAround 2s linear infinite;
    -moz-animation: spinAround 2s linear infinite;
    animation: spinAround 2s linear infinite;
}
/* Effect 7 */
 .hovicon.effect-7 {
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 1);
    -webkit-transition: background 0.2s, color 0.2s;
    -moz-transition: background 0.2s, color 0.2s;
    transition: background 0.2s, color 0.2s;
}
.hovicon.effect-7:hover, .hovicon.effect-7:hover i {
    color: #fff;
}
.hovicon.effect-7:after {
    top: -8px;
    left: -8px;
    padding: 8px;
    z-index: -1;
    opacity: 0;
}
/* Effect 7a */
 .hovicon.effect-7.sub-a:after {
    box-shadow: 0 0 0 rgba(255, 255, 255, 1);
    -webkit-transition: opacity 0.2s, box-shadow 0.2s;
    -moz-transition: opacity 0.2s, box-shadow 0.2s;
    transition: opacity 0.2s, box-shadow 0.2s;
}
.hovicon.effect-7.sub-a:hover:after {
    opacity: 1;
    box-shadow: 3px 3px 0 rgba(255, 255, 255, 1);
}
.hovicon.effect-7.sub-a:before {
    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    -ms-transform: scale(0.8);
    transform: scale(0.8);
    opacity: 0.7;
    -webkit-transition: -webkit-transform 0.2s, opacity 0.2s;
    -moz-transition: -moz-transform 0.2s, opacity 0.2s;
    transition: transform 0.2s, opacity 0.2s;
}
.hovicon.effect-7.sub-a:hover:before {
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
    opacity: 1;
}
/* Effect 7b */
 .hovicon.effect-7.sub-b:after {
    box-shadow: 3px 3px rgba(255, 255, 255, 1);
    -webkit-transform: rotate(-90deg);
    -moz-transform: rotate(-90deg);
    -ms-transform: rotate(-90deg);
    transform: rotate(-90deg);
    -webkit-transition: opacity 0.2s, -webkit-transform 0.2s;
    -moz-transition: opacity 0.2s, -moz-transform 0.2s;
    transition: opacity 0.2s, transform 0.2s;
}
.hovicon.effect-7.sub-b:hover:after {
    opacity: 1;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    transform: rotate(0deg);
}
.hovicon.effect-7.sub-b:before {
    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    -ms-transform: scale(0.8);
    transform: scale(0.8);
    opacity: 0.7;
    -webkit-transition: -webkit-transform 0.2s, opacity 0.2s;
    -moz-transition: -moz-transform 0.2s, opacity 0.2s;
    transition: transform 0.2s, opacity 0.2s;
}
.hovicon.effect-7.sub-b:hover:before {
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
    opacity: 1;
}
/* Effect 8 */
 .hovicon.effect-8 {
    background: rgba(255, 255, 255, 0.1);
    -webkit-transition: -webkit-transform ease-out 0.1s, background 0.2s;
    -moz-transition: -moz-transform ease-out 0.1s, background 0.2s;
    transition: transform ease-out 0.1s, background 0.2s;
}
.hovicon.effect-8:after {
    top: 0;
    left: 0;
    padding: 0;
    z-index: -1;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
    opacity: 0;
    -webkit-transform: scale(0.9);
    -moz-transform: scale(0.9);
    -ms-transform: scale(0.9);
    transform: scale(0.9);
}
.hovicon.effect-8:hover {
    background: rgba(255, 255, 255, 0.05);
    -webkit-transform: scale(0.93);
    -moz-transform: scale(0.93);
    -ms-transform: scale(0.93);
    transform: scale(0.93);
    color: #fff;
}
.hovicon.effect-8:hover i {
    color: #fff;
}
.hovicon.effect-8:hover:after {
    -webkit-animation: sonarEffect 1.3s ease-out 75ms;
    -moz-animation: sonarEffect 1.3s ease-out 75ms;
    animation: sonarEffect 1.3s ease-out 75ms;
}
@-webkit-keyframes sonarEffect {
    0% {
        opacity: 0.3;
    }
    40% {
        opacity: 0.5;
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 10px 10px #3851bc, 0 0 0 10px rgba(255, 255, 255, 0.5);
    }
    100% {
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 10px 10px #3851bc, 0 0 0 10px rgba(255, 255, 255, 0.5);
        -webkit-transform: scale(1.5);
        opacity: 0;
    }
}
@-moz-keyframes sonarEffect {
    0% {
        opacity: 0.3;
    }
    40% {
        opacity: 0.5;
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 10px 10px #3851bc, 0 0 0 10px rgba(255, 255, 255, 0.5);
    }
    100% {
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 10px 10px #3851bc, 0 0 0 10px rgba(255, 255, 255, 0.5);
        -moz-transform: scale(1.5);
        opacity: 0;
    }
}
@keyframes sonarEffect {
    0% {
        opacity: 0.3;
    }
    40% {
        opacity: 0.5;
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 10px 10px #3851bc, 0 0 0 10px rgba(255, 255, 255, 0.5);
    }
    100% {
        box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1), 0 0 10px 10px #3851bc, 0 0 0 10px rgba(255, 255, 255, 0.5);
        transform: scale(1.5);
        opacity: 0;
    }
}
/* Effect 9 */
 .hovicon.effect-9 {
    -webkit-transition: box-shadow 0.2s;
    -moz-transition: box-shadow 0.2s;
    transition: box-shadow 0.2s;
}
.hovicon.effect-9:after {
    top: 0;
    left: 0;
    padding: 0;
    box-shadow: 0 0 0 3px #fff;
    -webkit-transition: -webkit-transform 0.2s, opacity 0.2s;
    -moz-transition: -moz-transform 0.2s, opacity 0.2s;
    transition: transform 0.2s, opacity 0.2s;
}
/* Effect 9a */
 .hovicon.effect-9.sub-a:hover:after {
    -webkit-transform: scale(0.85);
    -moz-transform: scale(0.85);
    -ms-transform: scale(0.85);
    transform: scale(0.85);
    opacity: 0.5;
}
.hovicon.effect-9.sub-a:hover {
    box-shadow: 0 0 0 10px rgba(255, 255, 255, 1);
    color: #fff;
}
.hovicon.effect-9.sub-a:hover i {
    color: #fff;
}
/* Effect 9b */
 .hovicon.effect-9.sub-b:hover:after {
    -webkit-transform: scale(0.85);
    -moz-transform: scale(0.85);
    -ms-transform: scale(0.85);
    transform: scale(0.85);
}
.hovicon.effect-9.sub-b:hover {
    box-shadow: 0 0 0 10px rgba(255, 255, 255, 0.4);
    color: #fff;
}
.hovicon.effect-9.sub-b:hover i {
    color: #fff;
}

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