:root{
  --isdm-cb-color:#0ea5e9;
}
.isdm-cb-stack{
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.isdm-cb-left{ left: 14px; }
.isdm-cb-right{ right: 14px; }

.isdm-cb-btn{
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--isdm-cb-color);
  color: #fff;
  text-decoration: none;
  position: relative;
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
  animation: isdm-cb-pulse 2.4s infinite;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.isdm-cb-btn i{ font-size: 20px; }
.isdm-cb-btn:hover{
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 12px 24px rgba(0,0,0,0.25);
}

.isdm-cb-rounded .isdm-cb-btn{ border-radius: 999px; }
.isdm-cb-curved .isdm-cb-btn{ border-radius: 16px; }
.isdm-cb-square .isdm-cb-btn{ border-radius: 6px; }

.isdm-cb-tooltip{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  background: #111;
  color: #fff;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s, right .2s, left .2s;
}
.isdm-cb-left .isdm-cb-btn .isdm-cb-tooltip{
  left: 56px;
}
.isdm-cb-right .isdm-cb-btn .isdm-cb-tooltip{
  right: 56px;
}
.isdm-cb-btn:hover .isdm-cb-tooltip{ opacity: 1; }

@keyframes isdm-cb-pulse{
  0%{ box-shadow: 0 0 0 0 rgba(14,165,233,0.45); }
  70%{ box-shadow: 0 0 0 16px rgba(14,165,233,0); }
  100%{ box-shadow: 0 0 0 0 rgba(14,165,233,0); }
}

@media (max-width: 767px){
  .isdm-cb-btn{ width: 44px; height: 44px; }
  .isdm-cb-left{ left: 10px; }
  .isdm-cb-right{ right: 10px; }
}