.t-btn_sm {
    FONT-WEIGHT: 200;
    height: 55px;
    font-size: 18px;
    padding-left: 30px;
    padding-right: 30px;
}

.t-checkbox__indicator {
    border: 1px solid #000;
    box-sizing
Specifies the behavior of the 'width' and 'height' properties.
Learn more

Don't show
: border-box;
    display: inline-block;
    height: 14px;
    opacity: .6;
    position: relative;
    transition: all .2s;
    vertical-align: middle;
    width: 14px;
}