/* Moments Maker 全站悬浮导航：只用雾光 token，不抢阅读重心。
   另管窄屏吸顶头下滑收起（.mm-head-autohide 只由 float-nav.js 在窄屏挂上，宽屏零命中）。 */
.mm-float-nav {
  --mm-float-nav-bottom: 18px;
  --mm-float-nav-right: 18px;
  position: fixed;
  right: var(--mm-float-nav-right);
  bottom: calc(var(--mm-float-nav-bottom) + env(safe-area-inset-bottom));
  z-index: 50;
  display: grid;
  gap: 8px;
  opacity: 1;
  transition: opacity .2s ease;
}
.mm-float-nav[hidden] { display: none !important; }
.mm-float-nav.is-idle { opacity: .44; }
.mm-float-nav:hover,
.mm-float-nav:focus-within { opacity: 1; }
.mm-float-nav-button {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 1px solid var(--line, rgba(41,38,49,.12));
  border-radius: 50%;
  background: var(--fog-glass, #ffffffd9);
  color: var(--ink, #292631);
  box-shadow: 0 5px 16px rgba(41,38,49,.14);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font: inherit;
  cursor: pointer;
}
.mm-float-nav-button:hover,
.mm-float-nav-button:focus-visible { background: var(--fog-ice, #c8dee7); }
.mm-float-nav-button:disabled,
.mm-float-nav-button[aria-disabled="true"] {
  opacity: .34;
  cursor: default;
  box-shadow: none;
  background: var(--fog-glass, #ffffffd9);
}
.mm-float-nav-icon {
  font-size: 19px;
  line-height: 1;
  transform: translateY(-1px);
}
.mm-float-nav-tip {
  position: absolute;
  top: 50%;
  right: calc(100% + 9px);
  transform: translate(4px, -50%);
  padding: 6px 10px;
  border: 1px solid var(--line, rgba(41,38,49,.12));
  border-radius: 999px;
  background: var(--fog-glass, #ffffffd9);
  color: var(--ink-dim, #716c78);
  box-shadow: 0 4px 14px rgba(41,38,49,.10);
  font-size: 11.5px;
  line-height: 1;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease, visibility .15s;
}
.mm-float-nav-button:hover .mm-float-nav-tip,
.mm-float-nav-button:focus-visible .mm-float-nav-tip {
  opacity: 1;
  visibility: visible;
  transform: translate(0, -50%);
}

@media (max-width: 620px) {
  .mm-float-nav {
    --mm-float-nav-bottom: 12px;
    --mm-float-nav-right: 12px;
    gap: 6px;
  }
}

@media (max-width: 768px), (pointer: coarse) {
  .mm-head-autohide { transition: transform .24s ease; }
  .mm-head-autohide.is-tucked { transform: translateY(-100%); }
}

@media (prefers-reduced-motion: reduce) {
  .mm-float-nav,
  .mm-float-nav-tip,
  .mm-head-autohide { transition: none; }
}