:root{--primary-color:#007bff}body{margin:0;padding:0}@keyframes whatsappGlow{0%{box-shadow:0 0 10px rgba(37,211,102,.6),0 0 20px rgba(37,211,102,.4);transform:scale(1)}to{box-shadow:0 0 20px rgba(37,211,102,.9),0 0 40px rgba(37,211,102,.7),0 0 60px rgba(37,211,102,.5);transform:scale(1.08)}}.cs_whatsapp_btn{position:fixed;bottom:25px;left:25px;width:55px;height:55px;background-color:#25d366;color:#fff;border-radius:50%;font-size:26px;display:flex;align-items:center;justify-content:center;z-index:999;transition:all .3s ease;animation:whatsappGlow 1.8s infinite alternate;text-decoration:none}.cs_whatsapp_btn:hover{transform:scale(1.15)!important;background-color:#21bd5c}.cs_whatsapp_btn:after,.cs_whatsapp_btn:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;border-radius:50%;border:2px solid #25d366;opacity:0;z-index:-1;animation:whatsappRipple 2s infinite}.cs_whatsapp_btn:after{animation-delay:1s}@keyframes whatsappRipple{0%{transform:scale(1);opacity:.8}to{transform:scale(2);opacity:0}}