/* Code Explorer Module */

:root {
    --code-sidebar-width: 280px;
    --code-header-height: 48px;
    --code-tree-indent: 18px;
    --code-line-color: var(--color-border);
    --code-line-style: solid 1px;
    --code-row-hover-accent: var(--color-primary);
}

/* ============================================================
   Layout Shell
   ============================================================ */

.code-explorer {
    display: flex;
    align-items: flex-start;
    position: relative;
    background-color: var(--color-bg-body);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--color-text-main);
    border-top: 1px solid var(--color-border);
    min-height: 600px;
}

/* ============================================================
   Sidebar
   ============================================================ */

.code-explorer__sidebar {
    width: var(--code-sidebar-width);
    background-color: var(--color-bg-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 10;
    position: sticky;
    top: var(--header-height, 64px);
    height: calc(100vh - var(--header-height, 64px));
    max-height: 100vh;
    overflow: hidden;
}

/* Resize Handle */
.code-explorer__resize-handle {
    width: 4px;
    cursor: col-resize;
    background-color: transparent;
    flex-shrink: 0;
    align-self: stretch;
    transition: background-color var(--transition-fast);
    position: relative;
    z-index: 20;
}

.code-explorer__resize-handle:hover,
.code-explorer__resize-handle.is-resizing {
    background-color: var(--color-primary);
}

@media (max-width: 768px) {
    .code-explorer__resize-handle {
        display: none;
    }
}

/* Search Bar */
.code-explorer__search {
    height: var(--code-header-height);
    padding: 0 10px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 4px;
    background-color: var(--color-bg-surface);
    flex-shrink: 0;
}

.code-explorer__search input {
    flex: 1;
    width: auto;
    padding: 6px 10px;
    border-radius: 20px;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-body);
    color: var(--color-text-main);
    outline: none;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
}

.code-explorer__search input::placeholder {
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

.code-explorer__search input:focus {
    border-color: var(--color-primary);
    background-color: var(--color-bg-surface);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.12);
}

.code-explorer__search .btn-search {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    width: 28px;
    height: 28px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}

.code-explorer__search .btn-search:hover {
    background-color: var(--color-bg-surface-alt);
    color: var(--color-primary);
}

/* Tree Scroll Container */
.code-explorer__tree {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 6px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.code-explorer__tree::-webkit-scrollbar {
    width: 4px;
}

.code-explorer__tree::-webkit-scrollbar-track {
    background: transparent;
}

.code-explorer__tree::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: 4px;
}

/* ============================================================
   Tree Nodes
   ============================================================ */

.code-tree__node {
    position: relative;
    line-height: 1.4;
}

.code-tree__content {
    display: flex;
    align-items: center;
    padding: 5px 8px 5px 0;
    cursor: pointer;
    user-select: none;
    color: var(--color-text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    border-radius: 0 6px 6px 0;
    margin-right: 6px;
    position: relative;
}

.code-tree__content:hover {
    background-color: var(--color-bg-surface-alt);
    color: var(--color-text-main);
}

.code-tree__content.is-active {
    background-color: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
    font-weight: 600;
}

.code-tree__content.is-active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 3px;
    background-color: var(--color-primary);
    border-radius: 0 3px 3px 0;
}

@media (prefers-color-scheme: dark) {
    .code-tree__content.is-active {
        background-color: rgba(var(--color-primary-rgb), 0.18);
    }
}

.code-tree__toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
    z-index: 2;
}

.code-tree__toggle > svg {
    width: 12px;
    height: 12px;
}

.code-tree__toggle:hover {
    color: var(--color-text-main);
}

.code-tree__node.is-expanded > .code-tree__content > .code-tree__toggle {
    transform: rotate(90deg);
}

.code-tree__toggle.is-hidden {
    visibility: hidden;
}

.code-tree__icon {
    width: 16px;
    height: 16px;
    margin-right: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    z-index: 2;
}

.code-tree__icon img,
.code-tree__icon svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.code-tree__label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: inherit;
    text-decoration: none;
    font-size: 0.82rem;
}

/* Tree Structure Lines */
.code-tree__children {
    display: none;
    border-left: none;
    margin-left: 12px;
    padding-left: 0;
}

.code-tree__node.is-expanded > .code-tree__children {
    display: block;
}

.code-tree__children > .code-tree__node {
    padding-left: 12px;
}

/* Vertical guide line */
.code-tree__children > .code-tree__node::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    border-left: 1px dashed rgba(148, 163, 184, 0.35);
    width: 1px;
    height: auto;
}

/* Horizontal connector */
.code-tree__children > .code-tree__node::after {
    content: "";
    position: absolute;
    top: 15px;
    left: 0;
    width: 10px;
    height: 1px;
    border-top: 1px dashed rgba(148, 163, 184, 0.35);
}

/* Stop vertical line at last child */
.code-tree__children > .code-tree__node:last-child::before {
    height: 16px;
}

/* Top-level: no guide lines */
.code-explorer__tree > .code-tree__node::before,
.code-explorer__tree > .code-tree__node::after {
    display: none;
}

/* Loading State */
.code-tree__node.is-loading > .code-tree__content {
    cursor: wait;
    opacity: 0.6;
}

/* Search Highlight */
.code-tree__label mark {
    background-color: var(--color-mark-bg);
    color: var(--color-mark-text);
    border-radius: 2px;
    padding: 0 2px;
}

/* ============================================================
   Main Content Area
   ============================================================ */

.code-explorer__main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-body);
    min-width: 0;
}

/* Breadcrumbs */
.code-explorer__breadcrumbs {
    height: var(--code-header-height);
    padding: 0 var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
    display: flex;
    align-items: center;
    gap: 2px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    position: sticky;
    top: var(--header-height, 64px);
    z-index: 5;
}

.code-explorer__breadcrumbs::-webkit-scrollbar {
    display: none;
}

.code-explorer__breadcrumbs a {
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: 3px 7px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.82rem;
}

.code-explorer__breadcrumbs a:hover {
    background-color: var(--color-bg-surface-alt);
    color: var(--color-primary);
}

.code-explorer__breadcrumbs > a:last-of-type {
    color: var(--color-text-main);
    font-weight: 500;
}

.code-explorer__breadcrumbs span {
    color: var(--color-text-muted);
    padding: 0 1px;
    font-size: 0.75rem;
}

/* Content Wrapper */
.code-explorer__content {
    padding: var(--spacing-md);
    max-width: 100%;
}

/* ============================================================
   File List Rows
   ============================================================ */

.code-explorer__content .row {
    display: flex;
    align-items: center;
    padding: 7px 12px;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
    transition: background-color var(--transition-fast);
    margin-bottom: -1px;
    position: relative;
}

.code-explorer__content .row::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: transparent;
    transition: background-color var(--transition-fast);
    border-radius: 0 1px 1px 0;
}

.code-explorer__content .row:first-child {
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
    border-top: 1px solid var(--color-border);
    overflow: hidden;
}

.code-explorer__content .row:last-child {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
    overflow: hidden;
}

.code-explorer__content .row:hover {
    background-color: var(--color-bg-surface-alt);
    z-index: 1;
}

.code-explorer__content .row:hover::before {
    background-color: var(--color-primary);
}

.code-explorer__content .row .icon {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.code-explorer__content .row .icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.code-explorer__content .row .header {
    flex: 2;
    min-width: 0;
    font-weight: 500;
    font-size: 0.875rem;
}

.code-explorer__content .row .header a {
    color: var(--color-text-main);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.code-explorer__content .row .header a:hover {
    color: var(--color-primary);
}

.code-explorer__content .row .desc {
    flex: 3;
    min-width: 0;
    color: var(--color-text-muted);
    font-size: 0.78rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 var(--spacing-md);
}

.code-explorer__content .row .time {
    flex-shrink: 0;
    min-width: 90px;
    text-align: right;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
}

/* ============================================================
   Code View & Readme
   ============================================================ */

/* ---- Monaco Editor 容器 ---- */
.code-view-wrapper {
    position: relative;
}

/* 移动端: 隐藏 Monaco host,显示 Prism pre */
.monaco-host {
    display: none;
}

/* PC 端: 显示 Monaco host,隐藏 Prism pre */
@media (min-width: 769px) {
    .monaco-host {
        display: block;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        overflow: hidden;
    }

    /* Monaco 加载成功时隐藏 Prism */
    .code-view-wrapper .prism-fallback {
        display: none;
    }

    /* Monaco 失败降级时显示 Prism */
    .code-view-wrapper.use-prism .prism-fallback {
        display: block;
    }
    .code-view-wrapper.use-prism .monaco-host {
        display: none;
    }
}

/* ---- Monaco 语言徽章 ---- */
.monaco-editor,
.monaco-editor * {
    /* 全局 border-box 会导致 Monaco 在 Chromium 下字符测量偏差 */
    box-sizing: content-box;
}

.monaco-editor .view-lines,
.monaco-editor .view-line,
.monaco-editor .margin-view-overlays,
.monaco-editor .inputarea {
    /* 与 JS 里的 fontFamily 保持一致,避免 Chromium 字体回退造成选区宽度漂移 */
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", Consolas, "Cascadia Mono", "Courier New", monospace !important;
    font-variant-ligatures: common-ligatures contextual;
    font-feature-settings: "liga" 1, "calt" 1;
}

.monaco-lang-badge {
    position: absolute;
    bottom: 8px;
    right: 12px;
    font-size: 0.72rem;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
    background-color: var(--color-bg-surface, #1e1e1e);
    color: var(--color-text-muted, #858585);
    pointer-events: none;
    z-index: 10;
    opacity: 0.8;
    user-select: none;
}

/* ---- Monaco 行高亮(点击行后) ---- */
.monaco-highlighted-line {
    background-color: rgba(255, 200, 0, 0.15) !important;
}

.monaco-highlighted-line-gutter {
    background-color: rgba(255, 200, 0, 0.6);
    width: 3px !important;
    margin-left: 3px;
}

/* 暗色主题下加深一点 */
.vs-dark .monaco-highlighted-line {
    background-color: rgba(255, 200, 0, 0.12) !important;
}

/* ---- Prism 样式 ---- */
#codeView {
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: 'Fira Code', Consolas, Monaco, 'Andale Mono', monospace;
    position: relative;
}

#codeView code {
    display: block !important;
    font-family: inherit !important;
}

.line-highlight.line-highlight {
    margin-top: 16px !important;
}

.readme-main {
    background-color: var(--color-bg-surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 1px 4px var(--color-shadow);
    margin-top: var(--spacing-md);
}

/* ============================================================
   AI Tips Banner
   ============================================================ */

.row.ai-tips-warning {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    margin: var(--spacing-md) 0 0;
    background-color: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-status-warning);
    font-size: 0.82rem;
    border-bottom: 1px solid rgba(245, 158, 11, 0.3);
}

.row.ai-tips-warning::before {
    display: none;
}

/* ============================================================
   Responsive — Mobile
   ============================================================ */

@media (max-width: 768px) {
    .code-explorer__sidebar {
        display: none;
    }

    .code-explorer__content {
        padding: var(--spacing-sm);
    }

    .code-explorer__content .row {
        padding: 9px 10px;
        gap: 8px;
    }

    .code-explorer__content .row .icon {
        width: 16px;
        height: 16px;
        margin-right: 8px;
    }

    .code-explorer__content .row .header {
        font-size: 0.85rem;
        flex: 1;
    }

    .code-explorer__content .row .desc {
        display: none;
    }

    .code-explorer__content .row .time {
        display: none;
    }
}
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