.viacol-mss-flash{
  animation: viacolMssPulse 1.2s ease;
  outline: 2px solid rgba(13,110,253,.45);
  outline-offset: 2px;
  border-radius: 12px;
}
@keyframes viacolMssPulse{
  0%{ box-shadow: 0 0 0 0 rgba(13,110,253,.25); }
  100%{ box-shadow: 0 0 0 18px rgba(13,110,253,0); }
}
#booking-slots{ scroll-margin-top: 0px !important; }  /* + lo que ya compense tu header */