.imagen-respirando img{animation:respirar 4s ease-in-out infinite;transform-origin:center center}@keyframes respirar{0%{transform:scale(1)}50%{transform:scale(1.09)}100%{transform:scale(1)}}#boton-musica{position:fixed;bottom:25px;right:25px;width:48px;height:48px;border:1px solid rgba(255,223,0,0.7);border-radius:50%;background:rgba(0,156,59,0.85);color:#FFDF00;font-size:20px;cursor:pointer;z-index:99999;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px rgba(0,0,0,0.25);transition:transform 0.3s ease,background 0.3s ease,box-shadow 0.3s ease}#boton-musica:hover{transform:scale(1.1);background:rgba(0,156,59,1);box-shadow:0 6px 20px rgba(0,0,0,0.35)}@media (max-width:767px){#boton-musica{width:42px;height:42px;bottom:20px;right:20px;font-size:18px}}