.scroll-top {
  position: fixed;
  top: 50%;
  right: 0;
  z-index: 1050;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px 10px;
  border: 1px solid rgba(184, 149, 74, 0.35);
  border-right: 0;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  background-color: var(--color-ink);
  color: var(--color-gold);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 12px 30px -12px rgba(11, 11, 12, 0.55);
  opacity: 0;
  transform: translate(100%, -50%);
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.scroll-top[hidden] {
  display: none;
}

.scroll-top.is-visible {
  opacity: 1;
  transform: translate(0, -50%);
}

.scroll-top:hover,
.scroll-top:focus-visible {
  background: var(--color-gold);
  color: var(--color-ink);
}

.scroll-top:focus-visible {
  outline: 2px solid var(--color-paper-raised);
  outline-offset: -4px;
}

.scroll-top-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg); /* reads bottom to top */
  white-space: nowrap;
  line-height: 1;
}

.scroll-top-arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.scroll-top:hover .scroll-top-arrow {
  transform: translateY(-3px);
}

@media (max-width: 767.98px) {
  .scroll-top {
    padding: 12px 7px;
    font-size: 0.66rem;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-top,
  .scroll-top-arrow {
    transition: none;
  }
}