/* Supplemental motion for the no-link download preview button. */
.download-dock{
  isolation:isolate;
}

/* This free-standing layer leaves the dock dimensions and fixed placement untouched. */
.download-dock::after{
  content:"";
  position:absolute;
  z-index:-1;
  pointer-events:none;
  inset:-9px;
  border-radius:34px;
  background:rgba(255,70,143,.30);
  filter:blur(15px);
  opacity:.24;
  will-change:opacity;
  animation:download-motion-breathe 4.8s ease-in-out infinite;
}

@keyframes download-motion-breathe{
  0%,100%{opacity:.20;}
  50%{opacity:.52;}
}

/* Keep the content above a transient ripple without touching the existing button pseudo-elements. */
.download-button > :not(.download-button__ripple){
  position:relative;
  z-index:1;
}

.download-button__ripple{
  position:absolute;
  z-index:0;
  pointer-events:none;
  left:var(--download-ripple-x,50%);
  top:var(--download-ripple-y,50%);
  width:var(--download-ripple-size,150px);
  height:var(--download-ripple-size,150px);
  border-radius:50%;
  background:rgba(255,255,255,.46);
  opacity:.48;
  transform:translate(-50%,-50%) scale(.14);
  animation:download-motion-ripple .42s ease-out forwards;
}

@keyframes download-motion-ripple{
  from{opacity:.48;transform:translate(-50%,-50%) scale(.14);}
  to{opacity:0;transform:translate(-50%,-50%) scale(1);}
}

/* This is also the non-motion pressed highlight used under reduced-motion. */
.download-button.download-motion-pressed{
  filter:brightness(.97) saturate(.98);
  box-shadow:0 4px 12px rgba(255,31,106,.24),0 2px 5px rgba(132,10,63,.18) inset,0 1px 0 rgba(255,255,255,.26) inset;
}

@media (prefers-reduced-motion:no-preference){
  .download-button{
    transition:transform 120ms cubic-bezier(.2,.8,.2,1),box-shadow 120ms ease,filter 120ms ease;
  }
  .download-button.download-motion-pressed{
    transform:scale(.985);
  }
  .download-button.download-motion-rebound{
    animation:download-motion-rebound 200ms cubic-bezier(.2,1.35,.4,1);
  }
  @keyframes download-motion-rebound{
    0%{transform:scale(.985);}
    72%{transform:scale(1.008);}
    100%{transform:scale(1);}
  }
}

/* Visibility changes and the dock's existing zoom state pause only decorative motion. */
.download-dock.download-motion-paused::after,
.download-dock.is-zoomed::after{
  animation-play-state:paused;
}
.download-dock.download-motion-paused .download-button::before{
  animation-play-state:paused;
}
.download-dock.download-motion-paused .download-button__ripple{
  animation-play-state:paused;
}

@media (prefers-reduced-motion:reduce){
  .download-dock::after{
    animation:none;
    opacity:.28;
    will-change:auto;
  }
  .download-button__ripple{
    display:none;
    animation:none;
  }
  .download-button,
  .download-button.download-motion-pressed{
    transition:none;
    transform:none;
  }
  .download-button.download-motion-rebound{
    animation:none;
  }
}