.cont-btn{display:inline-block;height:50px;width:50px}.btn-letra{background-color:#e8e8e8;border:1px solid #999;height:40px;width:40px;cursor:pointer}.letra{font-size:20px;font-weight:700}.palabra{width:16%;font-weight:600;vertical-align:top;text-align:right}.definicion,.palabra{display:inline-block;font-size:14px}.definicion{width:74%;vertical-align:middle;line-height:1}@media (max-width:640px){.palabra{width:25%;text-align:center}.definicion{width:77%}}