.back-to-top {
  position: fixed;
  bottom: 50px;
  right: 12px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 4px 8px;
  border: 1px solid var(--green, var(--accent, var(--wine, #163f34)));
  border-radius: 6px;
  color: var(--green, var(--accent, var(--wine, #163f34)));
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 2px 8px rgba(8, 25, 21, .12);
  font: 700 12px/1.2 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-decoration: none;
}

.back-to-top[hidden] { display: none !important; }
.back-to-top:hover { background: #fff; }
.back-to-top:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }

@media (max-width: 600px) {
  .back-to-top { right: 8px; }
}