.sidebar {
  position: sticky;
  top: var(--navbar-height);
  align-self: start;
  height: calc(100dvh - var(--navbar-height));
  background: var(--color-bg-sidebar);
  border-right: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-3) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  overflow-x: hidden;
  overflow-y: auto;
  transition: padding var(--transition);
}

.app-shell.sidebar-collapsed .sidebar {
  padding: var(--space-4) var(--space-2);
}

.app-shell.sidebar-collapsed .sidebar__label {
  opacity: 0;
  height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.app-shell.sidebar-collapsed .sidebar__link {
  justify-content: center;
  padding: 0.7rem;
  gap: 0;
}

.app-shell.sidebar-collapsed .sidebar__link-text,
.app-shell.sidebar-collapsed .sidebar__brand-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sidebar__section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar__label {
  font-size: 0.6875rem;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3) var(--space-1);
}

.sidebar__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.6rem var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition-fast);
}

.sidebar__link:hover {
  background: var(--color-bg-sidebar-hover);
  text-decoration: none;
  color: var(--color-text);
}

.sidebar__link:active {
  transform: scale(0.98);
}

.sidebar__link.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary-hover);
  font-weight: var(--weight-semibold);
}

.sidebar__link.is-active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

.sidebar__link.is-active:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary-hover);
}

.sidebar__icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  opacity: 0.85;
  stroke: currentColor;
  fill: none;
}

.sidebar__link-text {
  white-space: nowrap;
}