.icon{
    width: auto;
    height: 35px;
    line-height: 35px;
    display: inline-block;
    border-radius: 50%;
    padding: 4px;
    cursor: pointer;
}
.icon img{
    width: 30px;
    height: 30px;
}
.icon:hover{
    background-color:rgba(207,216,222,0.2);
}
.clock-icon{
    display: inline-block;
    width: 20px;
    height: 20px;
    background: url("../images/clock.png") no-repeat;
    margin-right: 5px;
}
.author-icon{
    display: inline-block;
    width: 21px;
    height: 21px;
    background: url("../images/author.png") no-repeat;
    margin-right: 5px;
}
.person-icon{
    display: inline-block;
    width: 21px;
    height: 21px;
    background: url("../images/person.png") no-repeat;
    margin-right: 5px;
}
.share-icon{
    display: inline-block;
    width: 21px;
    height: 21px;
    background: url("../images/share.png") no-repeat;
}
.history-icon{
    display: inline-block;
    width: 20px;
    height: 17px;
    background: url("../images/history.png") no-repeat;
}