/**
 * AI Editor - Sidebar Styles
 * File tree, issues panel, pull requests, branch selector
 */

/* ============================================
   SIDEBAR (Left Panel)
   ============================================ */

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar-section {
    border-bottom: 1px solid var(--border);
}

/* ── Resizable sections container ── */
.sidebar-sections-resizable {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

/* Each resizable section: files, issues, PRs */
.sidebar-section-resizable {
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    flex: 1 1 auto;             /* All share space equally by default */
    border-bottom: none;        /* Resize handles provide visual separation */
}

/* Files gets extra default share */
.sidebar-section-resizable[data-section="files"] {
    flex: 3 1 auto;
}

/* When collapsed via ▸ toggle, section shrinks to header only */
.sidebar-section-resizable.section-collapsed {
    flex: 0 0 auto !important;
    min-height: auto;
    overflow: visible;
}

/* Old classes kept for backward compat — no longer used in HTML */
.sidebar-section-flex {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.sidebar-section-bottom {
    flex-shrink: 0;
}

.sidebar-section-bottom .issues-panel,
.sidebar-section-bottom .prs-panel {
    max-height: 180px;
    overflow-y: auto;
}

/* ── Horizontal resize handles between sections ── */
.sidebar-resize-handle {
    height: 4px;
    background: var(--border);
    cursor: row-resize;
    flex-shrink: 0;
    position: relative;
    transition: background 0.15s;
}

.sidebar-resize-handle:hover,
.sidebar-resize-handle:active {
    background: var(--accent, #58a6ff);
}

/* Larger hit area */
.sidebar-resize-handle::before {
    content: '';
    position: absolute;
    top: -3px;
    bottom: -3px;
    left: 0;
    right: 0;
}

/* PRs panel — flex inside resizable section */
.prs-panel {
    overflow-y: auto;
    flex: 1;
    min-height: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-hover) transparent;
}

.sidebar-header {
    padding: 0.5rem 1rem;
    font-size: var(--font-sm);
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.sidebar-header-collapsible {
    cursor: pointer;
    user-select: none;
}

.sidebar-header-collapsible:hover {
    background: var(--bg-hover);
}

.sidebar-header-collapsible.collapsed span::first-letter {
    /* Chevron rotates via text replacement in JS */
}

.sidebar-collapse-body {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex: 1;
    min-height: 0;
}

.sidebar-collapse-body.collapsed {
    display: none;
}

.sidebar-header button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 3px;
    min-width: 28px;              /* A3: touch target */
    min-height: 28px;             /* A3: touch target */
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.sidebar-header button:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

/* Project Selector */
.project-selector {
    padding: 0.5rem;
}

.project-selector select {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 0.5rem;
    font-size: var(--font-md);
    cursor: pointer;
}

.project-selector select:focus {
    outline: none;
    border-color: var(--accent);
}

.branch-selector {
    padding: 0 0.5rem 0.5rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.branch-selector select {
    flex: 1;
    min-width: 0; /* Allow shrinking below content width */
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 0.35rem 0.5rem;
    font-size: var(--font-sm);
    text-overflow: ellipsis;
}

.branch-selector button {
    flex-shrink: 0; /* Prevent button from shrinking */
}

/* File Tree - see scrollbar styling section below */

.tree-item {
    display: flex;
    align-items: center;
    padding: 0.25rem 0.5rem 0.25rem 0.75rem;
    cursor: pointer;
    user-select: none;
    font-size: var(--font-base);
}

.tree-item:hover {
    background: var(--bg-hover);
}

.tree-item.active {
    background: var(--bg-active);
}

.tree-item.dir {
    font-weight: 500;
}

.tree-item .icon {
    margin-right: 0.5rem;
    width: 16px;
    text-align: center;
}

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

.tree-item .actions {
    opacity: 0;
    display: flex;
    gap: 2px;
}

.tree-item:hover .actions {
    opacity: 1;
}

.tree-item .actions button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2px 4px;
    font-size: var(--font-xs);
    border-radius: 2px;
}

.tree-item .actions button:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Indent for nested items */
.tree-item[data-depth="1"] { padding-left: 1.25rem; }
.tree-item[data-depth="2"] { padding-left: 1.75rem; }
.tree-item[data-depth="3"] { padding-left: 2.25rem; }
.tree-item[data-depth="4"] { padding-left: 2.75rem; }
.tree-item[data-depth="5"] { padding-left: 3.25rem; }

/* Collapsible tree folders */
.tree-item .chevron {
    width: 12px;
    font-size: calc(var(--font-xs) - 2px);
    color: var(--text-muted);
    transition: transform 0.15s ease;
    flex-shrink: 0;
    margin-right: 2px;
}

.tree-item .chevron.expanded {
    transform: rotate(90deg);
}

.tree-item .chevron-spacer {
    width: 12px;
    flex-shrink: 0;
    margin-right: 2px;
}

.tree-children {
    overflow: hidden;
    transition: max-height 0.2s ease;
}

.tree-children.collapsed {
    display: none;
}

/* File tree scroll */
.file-tree {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem 0;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-hover) transparent;
}

.file-tree::-webkit-scrollbar {
    width: 6px;
}

.file-tree::-webkit-scrollbar-track {
    background: transparent;
}

.file-tree::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 3px;
}

.file-tree::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Issues Panel */
.issues-panel {
    overflow-y: auto;
    flex: 1;
    min-height: 0;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-hover) transparent;
}

.issues-panel::-webkit-scrollbar {
    width: 6px;
}

.issues-panel::-webkit-scrollbar-track {
    background: transparent;
}

.issues-panel::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 3px;
}

.issue-item {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
}

.issue-item:hover {
    background: var(--bg-hover);
}

.issue-item .issue-number {
    color: var(--accent);
    font-size: var(--font-sm);
}

.issue-item .issue-title {
    font-size: var(--font-md);
    line-height: 1.3;
    /* Allow wrapping instead of truncating */
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.issue-item .issue-labels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: 0.25rem;
}

.issue-label {
    font-size: var(--font-xs);
    padding: 1px 4px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.issue-item .issue-deps {
    font-size: var(--font-xs);
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.issue-item .issue-deps .dep-link {
    color: var(--warning);
    cursor: pointer;
}

.issue-item .issue-deps .dep-link:hover {
    text-decoration: underline;
}

.issue-item-active {
    border-left: 3px solid var(--accent);
    background: color-mix(in srgb, var(--bg-hover) 60%, var(--accent) 8%);
}

.issue-item-active .issue-number {
    font-weight: 700;
}

.issue-item-active .issue-number::after {
    content: ' ●';
    font-size: 8px;
    vertical-align: middle;
}

.issue-item-focused {
    border-left: 3px solid #6f42c1;
    background: color-mix(in srgb, var(--bg-hover) 60%, #6f42c1 10%);
}

.issue-item-focused .issue-number {
    font-weight: 700;
}

/* ============================================