.yf-back-to-top {
  position: fixed;
  z-index: 12;
  right: 26px;
  bottom: 26px;
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  color: var(--ink-900, var(--ink, #13202b));
  border: 1px solid var(--aqua-400, var(--cyan, #35d5d0));
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 10px 28px rgba(6, 31, 54, 0.18);
  font: inherit;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.2;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity 220ms ease,
    transform 220ms ease,
    visibility 220ms ease;
}

.yf-back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.yf-back-to-top:is(:hover, :focus-visible) {
  color: var(--ink-900, var(--ink, #13202b));
  border-color: var(--teal-700, var(--blue-600, #08786f));
  background: #ffffff;
}

.yf-back-to-top:focus-visible {
  outline: 3px solid var(--aqua-400, var(--cyan, #35d5d0));
  outline-offset: 3px;
}

.yf-back-to-top__icon {
  font-size: 18px;
  line-height: 1;
}

body.nav-open .yf-back-to-top,
body:has(dialog[open]) .yf-back-to-top {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
}

@media (max-width: 699px) {
  .yf-back-to-top {
    right: 16px;
    bottom: calc(16px + env(safe-area-inset-bottom));
    padding-inline: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .yf-back-to-top {
    transition: none;
  }
}