/* Smaller text everywhere */
.reveal {
  font-size: 30px;              /* adjust: 30, 28, 26... */
}

/* Make ONLY the title slide bigger again */
.reveal #title-slide {
  font-size: 1.25em;            /* increase: 1.15–1.4 */
}

/* (Optional) Fine-tune title slide headings */
.reveal #title-slide h1 { font-size: 2.2em; }
.reveal #title-slide h2 { font-size: 1.4em; }
.reveal #title-slide p  { font-size: 1.1em; }