.sidebar-v2 {
  position: fixed;
  left: 0;
  top: var(--total-top-height);
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 2px solid var(--sidebar-border);
  z-index: 100;
  font-size: var(--text-xs);
}

.sidebar-v2-scroll {
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Section headers */
.sidebar-v2-section-header {
  display: flex;
  align-items: center;
  padding: 10px var(--spacing-sm) 10px 10px;
  font-size: 13px;
  font-weight: var(--font-semibold);
  color: var(--color-disabled-text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  border-top: var(--border-thin) solid var(--sidebar-border);
  background: var(--sidebar-bg);
  flex-shrink: 0;
  transition: background-color 0.1s;
}

.sidebar-v2-section-header:first-child {
  border-top: none;
}

.sidebar-v2-section-header:hover {
  background: var(--sidebar-hover);
  color: var(--color-text);
}

.sidebar-v2-section-header.open {
  background: var(--sidebar-active);
  color: var(--color-text);
  border-left: 3px solid var(--color-primary);
  padding-left: 7px;
}

.sidebar-v2-section-header span:first-child {
  flex: 1;
}

.sidebar-v2-section-count {
  font-size: 9px;
  font-weight: var(--font-normal);
  color: var(--color-disabled-text);
  margin-left: var(--spacing-xs);
}

.sidebar-v2-header-actions {
  display: flex;
  gap: 4px;
  margin-right: var(--spacing-xs);
}

.sidebar-v2-header-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-disabled-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all 0.1s;
}

.sidebar-v2-header-btn:hover {
  color: var(--color-primary);
  background: var(--color-background);
}

/* Chevron */
.sidebar-v2-chevron::after {
  content: "\25B8";
  font-size: 9px;
  color: var(--color-disabled-text);
  transition: transform 0.15s;
  display: inline-block;
}

.sidebar-v2-section-header.open .sidebar-v2-chevron::after {
  transform: rotate(90deg);
  color: var(--color-text);
}

/* Section body */
.sidebar-v2-section-body {
  display: none;
}

.sidebar-v2-section-body.open {
  display: block;
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  background: var(--color-background);
}

/* Search */
.sidebar-v2-search {
  padding: var(--spacing-sm) var(--spacing-sm);
  background: var(--color-background);
  border-bottom: var(--border-thin) solid var(--sidebar-divider);
  position: sticky;
  top: 0;
  z-index: 1;
}

.sidebar-v2-search input {
  width: 100%;
  padding: 6px 10px;
  border: var(--border-thin) solid var(--sidebar-border);
  border-radius: 6px;
  font-size: var(--text-xs);
  font-family: var(--font-family-base);
  box-sizing: border-box;
  background: var(--sidebar-input-bg);
  color: var(--color-text);
}

.sidebar-v2-search input:focus {
  border-color: var(--color-primary);
  outline: none;
  background: var(--color-background);
  box-shadow: 0 0 0 2px rgba(49, 130, 206, 0.1);
}

.sidebar-v2-search input::placeholder {
  color: var(--color-disabled-text);
}

/* Search all link */
.sidebar-v2-search-all {
  display: block;
  margin-top: 4px;
  font-size: 10px;
  color: var(--color-primary);
  text-decoration: none;
  text-align: right;
}

.sidebar-v2-search-all:hover {
  text-decoration: underline;
}

/* List items */
.sidebar-v2-item {
  display: flex;
  align-items: center;
  padding: 7px var(--spacing-sm) 7px 14px;
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.1s;
  border-left: 3px solid transparent;
}

.sidebar-v2-item:hover {
  background: var(--sidebar-hover);
}

.sidebar-v2-item.active {
  background: var(--sidebar-active);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: var(--font-medium);
}

.sidebar-v2-item.active .sidebar-v2-quick {
  color: var(--color-primary);
  opacity: 0.6;
}

.sidebar-v2-item.active .sidebar-v2-quick:hover {
  opacity: 1;
  background: rgba(49, 130, 206, 0.15);
}

.sidebar-v2-item.active .sidebar-v2-badge {
  background: rgba(49, 130, 206, 0.15);
  color: var(--color-primary);
}

.sidebar-v2-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.sidebar-v2-quick {
  color: var(--color-disabled-text);
  font-size: var(--text-xs);
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  cursor: pointer;
  border-radius: 50%;
  transition: color 0.15s, background-color 0.15s;
}

.sidebar-v2-quick:hover {
  color: var(--color-primary);
  background: rgba(49, 130, 206, 0.1);
}

.sidebar-v2-badge {
  display: inline-block;
  font-size: 9px;
  font-weight: var(--font-bold);
  color: #718096;
  background: var(--sidebar-hover);
  border-radius: 3px;
  padding: 1px 4px;
  margin-left: 4px;
  vertical-align: middle;
  flex-shrink: 0;
}

/* Section action link */
.sidebar-v2-section-action {
  display: block;
  padding: 6px 14px;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-medium);
  font-size: var(--text-xs);
  border-top: var(--border-thin) solid var(--sidebar-divider);
}

.sidebar-v2-section-action:hover {
  background: var(--sidebar-hover);
}

/* Responsive */
@media (max-width: 1200px) {
  .sidebar-v2 {
    left: -300px;
    width: 280px;
    top: 0;
    transition: left 0.3s ease;
    box-shadow: none;
    z-index: 1001;
  }

  .sidebar-open .sidebar-v2 {
    left: 0;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.15);
  }

  .sidebar-v2-section-header {
    padding: 14px var(--spacing-sm) 14px 10px;
  }

  .sidebar-v2-section-header.open {
    padding-left: 7px;
  }

  .sidebar-v2-item {
    padding: 0 var(--spacing-sm) 0 14px;
    min-height: 44px;
    box-sizing: border-box;
  }

  .sidebar-v2-header-btn {
    width: 44px;
    height: 44px;
    font-size: var(--text-base);
  }

  .sidebar-v2-quick {
    width: 44px;
    height: 100%;
  }

  .sidebar-v2-search input {
    padding: 12px 10px;
    font-size: var(--text-sm);
  }

  .sidebar-v2-search-all {
    display: none;
  }

  .sidebar-v2-section-action {
    padding: 12px 14px;
  }
}