.cards-container
{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.cards-container .box
{
    position: relative;
    width:450px;
    padding: 40px;
    background: #fff;
    box-shadow:0 5px 15px rgba(0, 0, 0, 0.2) ;
    border-radius: 4px;
    margin: 20px;
    box-sizing: border-box;
    overflow: hidden;
    text-align: center;
}
.cards-container .box:before
{
    content: '';
    width: 50%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: rgba(255,255,255,.2);
    z-index: 2; ;
    pointer-events: none;
}

.cards-container .box .icon
{
    position: relative;
    width: 80px;
    height: 80px;
    color: #fff;
    background: #000;
    display: flex;
    justify-content:center ;
    align-items:center ;
    margin: 0 auto;
    border-radius: 50%;
    font-size: 40px;
    font-weight: 700;
    transition: .5s;
}
.cards-container .box:nth-child(1) .icon
{
    box-shadow: 0 0 0 0 #e91e63;
    background: #e91e63;
}
.cards-container .box:nth-child(1):hover .icon
{
    box-shadow: 0 0 0 400px #e91e63;
}
.cards-container .box:nth-child(2) .icon
{
    box-shadow: 0 0 0 0 #20c020;
    background: #20c020;
}
.cards-container .box:nth-child(2):hover .icon
{
    box-shadow: 0 0 0 400px #20c020;
}
.cards-container .box:nth-child(3) .icon
{
    box-shadow: 0 0 0 0 #2196f3;
    background: #2196f3;
}
.cards-container .box:nth-child(3):hover .icon
{
    box-shadow: 0 0 0 400px #2196f3;
}
.cards-container .box:nth-child(4) .icon
{
    box-shadow: 0 0 0 0 #7f9108;
    background: #7f9108;
}
.cards-container .box:nth-child(4):hover .icon
{
    box-shadow: 0 0 0 400px #7f9108;
}
.cards-container .box .content
{
    position: relative;
    z-index: 1;
    transition: 0.5s;
   
}

.cards-container .box:hover .content
{
    color: #fff;
}
.cards-container .box .content h3{
    font-size: 20px;
    margin: 10px 0;
    padding: 0;
}
.cards-container .box .content p
{
    margin: 0;
    padding: 0;
}
.ani .a 
{
    display: inline-block;
    padding: 10px 20px;
    background: #fff;
    border-radius: 4px;
    text-decoration: none;
    color: #000;
    font-weight: 500;
    margin-top: 20ox;
    box-shadow: 0 2px 5px rgba(0,0,0,.2);
}