.user-minutes .user-btn { display: none; }
#tab-time-1 .user-minutes .user-btn[data-value="00"],
#tab-time-1 .user-minutes .user-btn[data-value="30"] { display: inline-block; }
#tab-time-2 .user-minutes .user-btn[data-value="15"],
#tab-time-2 .user-minutes .user-btn[data-value="45"] { display: inline-block; }