.pr {
    position: relative;
}

.dib {
    display: inline-block;
}

.db {
    display: block;
}

.text-with-material-icon {
    position: relative;
}

.text-with-material-icon i {
    position: absolute;
    left: calc(100% + 7px);
}

.height0 {
    height: 0;
    overflow: hidden;
    transition: height 0.2s;
}

.mt-30 {
    margin-top: -30px;
}

.mr15 {
    margin-right: 15px;
}

.mb20 {
    margin-bottom: 20px;
}

.hide {
    display: none;
}

.break_word {
    word-break: break-word;
}

.pull-left {
    float: left;
}

.pull-right {
    float: right;
}

.text-center {
    text-align: center;
}