:root{
  --rs-radius:16px;
  --rs-gap:6px;
  --rs-item:44px;
  --rs-pad:8px;
  --rs-border:rgba(255,255,255,.10);
  --rs-scrim:rgba(0,0,0,.55);
  --rs-bg:rgba(24,24,27,.72);
  --rs-shadow:0 18px 38px rgba(0,0,0,.45);
  --rs-shadow-soft:0 10px 22px rgba(0,0,0,.32);
}

.sidebar-container{
  position:fixed;
  right:16px;
  top:50%;
  transform:translateY(-50%);
  z-index:900;
  display:flex;
  flex-direction:column;
  gap:var(--rs-gap);
  padding:var(--rs-pad);
  border-radius:var(--rs-radius);
  background:var(--rs-bg);
  border:1px solid var(--rs-border);
  box-shadow:var(--rs-shadow);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}

.sidebar-item{
  height:var(--rs-item);
  width:var(--rs-item);
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  color:rgba(255,255,255,.82);
  text-decoration:none;
  position:relative;
  user-select:none;
  transition:transform .18s var(--ease-apple), background-color .18s var(--ease-apple), box-shadow .18s var(--ease-apple), color .18s var(--ease-apple);
}

.sidebar-item:focus-visible{
  outline:none;
  box-shadow:0 0 0 3px rgba(139,92,246,.35), var(--rs-shadow-soft);
}

.sidebar-item:hover{
  background:rgba(255,255,255,.08);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--rs-shadow-soft);
}

.sidebar-item:active{
  transform:scale(.98);
  box-shadow:none;
}

.sidebar-icon{
  width:20px;
  height:20px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0;
  font-size:16px;
  color:currentColor;
}

.sidebar-text{
  display:none;
}

.sidebar-item::after{
  content:attr(title);
  position:absolute;
  right:calc(100% + 10px);
  top:50%;
  transform:translateY(-50%) translateX(6px);
  background:rgba(24,24,27,.92);
  border:1px solid rgba(255,255,255,.12);
  border-radius:12px;
  padding:8px 10px;
  color:rgba(255,255,255,.92);
  font-size:12px;
  font-weight:600;
  letter-spacing:-.1px;
  white-space:nowrap;
  opacity:0;
  pointer-events:none;
  transition:opacity .18s var(--ease-apple), transform .18s var(--ease-apple);
  box-shadow:var(--rs-shadow-soft);
}

.sidebar-item:hover::after{
  opacity:1;
  transform:translateY(-50%) translateX(0);
}

.sidebar-item.back-to-top{
  margin-top:6px;
}

.sidebar-item.back-to-top::before{
  content:'';
  position:absolute;
  top:-6px;
  left:10px;
  right:10px;
  height:1px;
  background:rgba(255,255,255,.12);
}

@media (max-width:768px){
  .sidebar-container{
    right:12px;
  }
  .sidebar-item::after{
    display:none;
  }
}