/packages/codium/sources/app/components/MainSidebar.css

.app__sidebar {
    position: relative;
    width: var(--sidebar-width, 319px);
    min-width: var(--sidebar-width, 319px);
    padding-top: var(--height-toolbar);
    background: transparent;
    display: flex;
    flex-direction: column;
    overflow: visible;
    transition:
        width 180ms ease,
        min-width 180ms ease,
        opacity 120ms ease;
}

html.is-resizing-sidebar .app__sidebar,
html.is-resizing-sidebar .app__toolbar {
    transition: none !important;
}

.app__sidebar > .app__sidebar-nav,
.app__sidebar > .app__sidebar-footer {
    overflow: hidden;
}

.app__sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 1px;
    padding: 0 8px;
}

.app__sidebar-footer {
    margin-top: auto;
    padding: 8px;
    border-top: 1px solid var(--color-border-light);
}

.app__sidebar-header,
.app__sidebar-section-header {
    /* Match Codex: regular case 13px, no tracking, slight indent. */
    padding: 8px 8px 2px;
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-text-foreground-tertiary);
}

.app__nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    min-height: 30px;
    padding: 5px 8px;
    border-radius: 12.5px;
    font-size: var(--text-sm);
    line-height: 1.42;
    color: var(--color-text-foreground);
    text-align: left;
    overflow: hidden;
}

.app__nav-item:hover,
.app__nav-item:focus-visible {
    background: var(--color-hover);
    color: var(--color-text-foreground);
}

.app__nav-item:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

.app__nav-item--active,
.app__nav-item--active:hover,
.app__nav-item--active:focus-visible {
    background: var(--color-active);
    color: var(--color-text-foreground);
}

.app__nav-item--nested {
    padding-left: 20px;
}

.app__nav-item > span {
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.app__nav-kbd {
    margin-left: auto;
    padding: 2px 6px;
    border-radius: 10px;
    background: color-mix(in srgb, currentColor 10%, transparent);
    color: inherit;
    font-size: 11px;
    line-height: 1;
    font-family: inherit;
}

.app__sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 1px;
    margin-top: 8px;
}

.app__sidebar-row {
    display: flex;
    align-items: stretch;
    width: 100%;
}

.app__sidebar-row-main {
    flex: 1;
    min-width: 0;
}

/* Truncate long chat titles instead of wrapping. */
.app__sidebar-row-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.app__sidebar-row-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin: 3px 0 3px 4px;
    border-radius: 10px;
    color: var(--color-text-foreground-tertiary);
    background: transparent;
    opacity: 0;
    transition:
        opacity 120ms ease,
        background 120ms ease,
        color 120ms ease;
}

.app__sidebar-row:hover .app__sidebar-row-close,
.app__sidebar-row-close:focus-visible {
    opacity: 1;
}

.app__sidebar-row-close:hover {
    background: var(--color-hover);
    color: var(--color-text-foreground);
}

.app__project {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.app__project-header {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 0;
}

.app__project-title {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px;
    color: var(--color-text-foreground-secondary);
    font-size: var(--text-sm);
}

.app__project-title span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app__project-add {
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 9px;
    background: transparent;
    color: var(--color-text-foreground-tertiary);
}

.app__project-add:hover,
.app__project-add:focus-visible {
    background: var(--color-hover);
    color: var(--color-text-foreground);
}

.app__context-menu {
    min-width: 164px;
    padding: 4px;
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    background: var(--color-background-elevated-primary-opaque);
    box-shadow: 0 12px 28px color-mix(in srgb, #000 18%, transparent);
    z-index: 1000;
}

.app__context-menu-item {
    display: flex;
    align-items: center;
    min-height: 28px;
    padding: 5px 8px;
    border-radius: 6px;
    color: var(--color-text-foreground);
    font-size: var(--text-sm);
    outline: none;
}

.app__context-menu-item[data-highlighted] {
    background: var(--color-hover);
}

.app__context-menu-item--danger {
    color: var(--color-decoration-deleted);
}