:root{--color-base: #fef988;--sombra: #d4c752;--color-letra: #7a6f1b;--brillo: #f9f5b2}*,:before,:after{box-sizing:border-box;border:0}.btn{height:2.5rem;background-color:var(--color-base);border-radius:.7rem;border:0;color:var(--color-letra);padding:1rem;font-weight:700;transition:transform .2s ease-out;box-shadow:0 5px 0 var(--sombra);margin-right:.4rem;transition:transform .1s,box-shadow .1s}.btn:hover{background-color:var(--brillo);cursor:pointer}.btn:active{box-shadow:none;transform:translateY(1px)}.btn-salir{width:2rem}