Right, let's fix this properly. Replace your entire CSS with this:
css.recent-posts__slider {
  width: 100%;
  display: block !important;
}
.recent-posts__slider .slick-track {
  display: flex;
  gap: 20px;
}
.recent-posts__slider .item-with-image {
  height: unset !important;
}

/* Custom arrow styling - perfect circles */
.recent-posts__slider .slick-prev,
.recent-posts__slider .slick-next {
  position: absolute !important;
  bottom: -50px !important;
  top: auto !important;
  width: 40px !important;
  height: 40px !important;
  border: none !important;
  border-radius: 50% !important;
  background: #0d2130 !important;
  color: transparent !important;
  font-size: 0 !important;
  z-index: 10 !important;
  cursor: pointer !important;
  transition: all 0.3s ease !important;
  text-indent: -9999px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 0 !important;
  margin: 0 !important;
  outline: none !important;
}

.recent-posts__slider .slick-prev:hover,
.recent-posts__slider .slick-next:hover {
  background: #081419 !important;
  opacity: 0.9 !important;
}

.recent-posts__slider .slick-prev {
  left: calc(50% - 50px) !important;
  right: auto !important;
}

.recent-posts__slider .slick-next {
  right: calc(50% - 50px) !important;
  left: auto !important;
}

/* Clean arrow icons */
.recent-posts__slider .slick-prev:before,
.recent-posts__slider .slick-next:before {
  content: '' !important;
  position: absolute !important;
  width: 8px !important;
  height: 8px !important;
  border-top: 2px solid white !important;
  border-right: 2px solid white !important;
  border-left: none !important;
  border-bottom: none !important;
  font-family: none !important;
  font-size: 0 !important;
  line-height: 0 !important;
  opacity: 1 !important;
}

.recent-posts__slider .slick-prev:before {
  transform: rotate(-135deg) !important;
  margin-left: 2px !important;
}

.recent-posts__slider .slick-next:before {
  transform: rotate(45deg) !important;
  margin-right: 2px !important;
}