.step{display:none}.active{display:block}

.rec-btn,.stop-btn{
width:80px;height:80px;border-radius:50%;border:none;color:#fff;font-weight:bold;margin:10px;
}
.rec-btn{background:#28a745;}
.stop-btn{background:#dc3545;}

.iv-btn-black{
background:#000;color:#fff;padding:10px 20px;border:none;border-radius:6px;
}

.iv-timer{
font-size:16px;font-weight:bold;margin-top:10px;
}

@media(max-width:768px){
.rec-btn,.stop-btn{width:65px;height:65px;}
}

video{
width:100%;
border-radius:10px;
margin-top:10px;
background:#000;
}