.center {
  text-align: center;   /* centers inline content like text, buttons */
}

.center-block {
  display: block;
  margin-left: auto;
  margin-right: auto;   /* centers block-level items (like <button>, <img>) */
}

.carousel-caption {
  position: relative;
  z-index: 10; /* makes sure caption and buttons are on top */
}

.carousel-caption a,
.carousel-caption button {
  position: relative;
  z-index: 20; /* buttons above everything */
  pointer-events: auto; /* ensure they can be clicked */
}

/* Default kill underline (buttons, nav, header/footer) */
a {
  color: inherit;
  text-decoration: none;
}

/* Scoped override: article body links */
.prose a {
  color: #93c5fd;                  /* nice accessible blue */
  text-decoration: underline;      /* only these get underlined */
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: #bfdbfe;                  /* lighter on hover */
}