<style>
/* NOVÉ NASTAVENIE CAROUSELU */
#carousel .carousel-slide-caption {
	width: 450px;
  padding: 20px;
  background: #ffffff8a;
  }
<style>

<style>
/* NOVÉ NASTAVENIE CAROUSELU TELEFON */
@media screen and (max-width: 768px) {
#carousel .carousel-slide-caption {
    width: 200px;
    padding: 20px;
    background: #ffffff8a;
}
  }
<style>