/* Sidebar - Floating Panel Design */
.sidebar {
  background-color: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
}

.sidebar__section {
  padding: var(--spacing-lg) var(--spacing-md);
}

.sidebar__section:not(:last-child) {
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar__section-title {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-md);
  padding: 0 var(--spacing-sm);
}

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

/* Sidebar Item - Refined Interactive State */
.sidebar__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  font-size: 0.9375rem;
  font-weight: var(--font-normal);
  letter-spacing: -0.01em;
  background-color: transparent;
}

.sidebar__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: height var(--transition-spring);
}

.sidebar__item:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text);
  transform: translateX(2px);
}

.sidebar__item--active {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  font-weight: var(--font-medium);
  box-shadow: inset 0 0 0 1px var(--color-primary-hover);
}

.sidebar__item--active::before {
  height: 24px;
}

.sidebar__item-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: transform var(--transition-base);
}

.sidebar__item:hover .sidebar__item-icon {
  transform: scale(1.1);
}

.sidebar__item-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Count Badge - Pill Design */
.sidebar__item-count {
  font-size: 0.75rem;
  font-weight: var(--font-semibold);
  padding: 0.1875rem 0.5rem;
  border-radius: var(--radius-xl);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  min-width: 22px;
  text-align: center;
  transition: all var(--transition-base);
  font-feature-settings: 'tnum' 1;
  box-shadow: inset 0 0 0 1px var(--color-border);
}

.sidebar__item--active .sidebar__item-count {
  background-color: var(--color-primary);
  color: white;
  box-shadow: none;
}

/* Hover Actions - Contextual Controls */
.sidebar__item-actions {
  display: none;
  gap: 4px;
}

.sidebar__item:hover .sidebar__item-actions {
  display: flex;
}

.sidebar__item:hover .sidebar__item-count {
  display: none;
}

.sidebar__item-action {
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  background-color: transparent;
}

.sidebar__item-action:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  transform: scale(1.1);
}

.sidebar__item--active .sidebar__item-action:hover {
  background-color: var(--color-primary-hover);
}

/* Folder Color Dot - Vibrant Indicator */
.folder-color-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-circle);
  flex-shrink: 0;
  box-shadow: 0 0 0 2px var(--color-bg-secondary);
  transition: all var(--transition-base);
  position: relative;
}

.folder-color-dot::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-circle);
  background: inherit;
  opacity: 0.2;
  transition: opacity var(--transition-base);
}

.sidebar__item:hover .folder-color-dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 2px var(--color-bg-elevated), 0 2px 8px rgba(0, 0, 0, 0.15);
}

.sidebar__item:hover .folder-color-dot::after {
  opacity: 0.4;
}

/* Footer - Action Button */
.sidebar__footer {
  margin-top: auto;
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
  background: linear-gradient(180deg, transparent 0%, var(--color-bg-tertiary) 100%);
}

.sidebar__new-folder-btn {
  width: 100%;
  justify-content: center;
  background: var(--color-bg-elevated);
  color: var(--color-text);
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-lg);
  font-weight: var(--font-medium);
  font-size: 0.9375rem;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
  letter-spacing: -0.01em;
  box-shadow: var(--shadow-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar__new-folder-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sidebar__new-folder-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .sidebar {
    align-items: center;
  }

  .sidebar__section {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xs);
  }

  .sidebar__section-title {
    display: none;
  }

  .sidebar__item {
    justify-content: center;
    padding: 0.875rem 0.625rem;
    border-radius: var(--radius-lg);
  }

  .sidebar__item-text,
  .sidebar__item-count,
  .sidebar__item-actions {
    display: none;
  }

  .sidebar__item::before {
    display: none;
  }

  .sidebar__item-icon {
    width: 24px;
    height: 24px;
    font-size: 1.25rem;
  }

  .sidebar__footer {
    padding: var(--spacing-md) var(--spacing-xs);
  }

  .sidebar__new-folder-btn {
    padding: 0.875rem;
    justify-content: center;
  }

  .sidebar__new-folder-btn span:last-child {
    display: none;
  }
}