.sidebar{
  position: fixed;
  left: 22px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 10px;
  background: rgba(20,20,20,0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 100px;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity var(--t-med), visibility var(--t-med);
}
.sidebar.visible{
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

.sidebar .dot{
  position: relative;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.18);
  border: none;
  padding: 0;
  transition: background var(--t-fast), transform var(--t-fast);
  cursor: pointer;
}
.sidebar .dot::before{
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
}
.sidebar .dot:hover{
  background: var(--text-2);
  transform: scale(1.25);
}
.sidebar .dot.active{
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  transform: scale(1.15);
}
.sidebar .dot:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}

.sidebar .dot::after{
  content: attr(data-label);
  position: absolute;
  left: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.76rem;
  padding: 6px 12px;
  border-radius: 6px;
  white-space: nowrap;
  border: 1px solid var(--border);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast), transform var(--t-fast);
  box-shadow: var(--shadow-sm);
  font-family: var(--font);
  letter-spacing: 0.01em;
}
.sidebar .dot:hover::after{
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

@media (max-width: 1100px){
  .sidebar{ display: none; }
}