.slider_heading {
  font-size: 1.4em;
  width: 250px;
}

.slider_description {
  font-size: 1.25em;
}
    
/* 75% */
@media only screen and (min-width: 768px) and (max-width: 959px) {
    .slider_heading {
        width: 176px !important; 
        font-size: 2.5em !important;
    }
    
    .slider_description {
        font-size: 1.5em;
    }
}

/* 50%-25% */
@media only screen and (max-width: 767px) {
    .slider_heading {
      font-size: 3.5em !important;
      width: 78px !important;
      line-height: 1em;
    }
    
    .slider_description {
        font-size: 2.5em;
    }
}           
/* 50% */    
@media only screen and (min-width: 480px) and (max-width: 767px) {
    .slider_heading {
        font-size:3.0em !important;
        width: 103px !important;
    }

    .slider_description {
        font-size: 2.0em;
    }
}