.t-checkbox__indicator {
    border: 2px solid #000;
    box-sizing: border-box;
    display: inline-block;
    height: 20px;
    opacity: .6;
    position: relative;
    transition: all .2s;
    vertical-align: middle;
    width: 20px;
    border-radius: 6px;
}    
    .t-checkbox__control.t-checkbox__control_flex {
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    gap: 6px;
}