.inline-copy {
  appearance: none;
  border: 0;
  padding: 0;
  margin: 0;
  background: none;
  color: inherit;
  font: inherit;
  font-size: 0.93em;
  cursor: pointer;
  text-decoration: none;
}

.inline-copy:hover {
  color: #b22222;
}

.copy-email {
  margin-left: 0.3rem;
  font-size: 0.78rem;
  opacity: 0.72;
}

.copy-email:hover {
  opacity: 1;
}

#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(80, 80, 80, 0.22);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: #555;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s ease;
  z-index: 20;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

#back-to-top.visible {
  opacity: 0.78;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  opacity: 1;
  color: #b22222;
}

@media (prefers-color-scheme: dark) {
  #back-to-top {
    background: rgba(30, 30, 30, 0.92);
    color: #bbb;
    border-color: rgba(220, 220, 220, 0.18);
  }
}

@media (max-width: 640px) {
  #back-to-top {
    right: 16px;
    bottom: 16px;
  }
}