.reader-close {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 60;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 2px solid white;
  border-radius: 50%;
  background: #dc2626;
  color: white;
  cursor: pointer;
  box-shadow: 0 2px 10px #0005;
}
.reader-close svg { width: 22px; height: 22px; }
.reader-close:hover { background: #b91c1c; }
.reader-close:focus-visible { outline: 3px solid #12bfb9; outline-offset: 3px; }
.topbar, .zoom-bar { padding-right: 72px; }
.thumb-head { padding-right: 52px; }