.yeffi-btn{padding:.7rem 1rem;border-radius:12px}
.yeffi-led{width:54px;height:54px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}
.yeffi-led .led{width:18px;height:18px;border-radius:50%;box-shadow:0 0 12px rgba(0,255,180,.8);background:rgba(0,255,180,.9);animation:pulse 1.5s infinite}
@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.15)}100%{transform:scale(1)}}