/* TOC 目录菜单 - 精简版，完全兼容 github-style 主题 */
/* 版本: v3 - 强制缓存刷新 */

/* TOC 按钮样式 - 无边框、无阴影设计 */
#toc-toggle {
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--color-fg-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 5px 8px;
    font-size: 12px;
    line-height: 1;
    transition: 0.2s cubic-bezier(0.3, 0, 0.5, 1);
    min-width: 0;
    box-shadow: none;
    outline: none;
}

#toc-toggle:hover {
    background-color: var(--color-btn-hover-bg);
    color: var(--color-fg-default);
    box-shadow: none;
}

#toc-toggle:active {
    color: var(--color-fg-default);
    box-shadow: none;
    outline: none;
}

/* TOC 菜单容器 - 使用固定定位 */
div.SelectMenu#toc-details {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    width: 280px;
    max-width: calc(100vw - 32px);
    margin: 0;
    padding: 0;
    will-change: transform;
    display: none;
    /* 确保紧贴 header，无额外间距 */
    margin-top: 0;
}

/* TOC 菜单主体 - 更紧凑的设计 */
div.SelectMenu#toc-details .SelectMenu-modal {
    background: var(--color-canvas-overlay);
    border: 1px solid var(--color-border-default);
    border-radius: 6px;
    box-shadow: var(--color-shadow-large);
    max-height: 320px;
    overflow: hidden;
    position: relative;
    margin: 0;
}

/* TOC 列表容器 */
div.SelectMenu#toc-details .SelectMenu-list {
    padding: 4px 0;
    max-height: 300px;
    overflow-y: auto;
    scrollbar-width: thin;
}

/* 滚动条样式 */
div.SelectMenu#toc-details .SelectMenu-list::-webkit-scrollbar {
    width: 6px;
}

div.SelectMenu#toc-details .SelectMenu-list::-webkit-scrollbar-track {
    background: transparent;
}

div.SelectMenu#toc-details .SelectMenu-list::-webkit-scrollbar-thumb {
    background: var(--color-neutral-muted);
    border-radius: 3px;
}

div.SelectMenu#toc-details .SelectMenu-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-neutral-emphasis);
}

/* TOC 项目样式 - 更紧凑 */
.toc-item {
    display: block;
    padding: 4px 12px;
    color: var(--color-fg-default);
    text-decoration: none;
    font-size: 13px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all 0.12s ease-out;
    background: transparent;
    border-radius: 3px;
    margin: 1px 4px;
}

.toc-item:hover {
    background-color: var(--color-action-list-item-default-hover-bg);
    text-decoration: none;
    color: var(--color-fg-default);
}

.toc-item:active {
    background-color: var(--color-action-list-item-default-active-bg);
}

/* 响应式设计 */
@media (max-width: 768px) {
    div.SelectMenu#toc-details {
        width: 260px;
        max-width: calc(100vw - 16px);
    }
    
    .toc-item {
        font-size: 12px;
        padding: 3px 10px;
    }
}

/* 兼容暗色模式 */
[data-color-mode="dark"] div.SelectMenu#toc-details .SelectMenu-modal {
    background: var(--color-canvas-overlay);
    border-color: var(--color-border-default);
}

[data-color-mode="dark"] .toc-item {
    color: var(--color-fg-default);
}

[data-color-mode="dark"] .toc-item:hover {
    background-color: var(--color-action-list-item-default-hover-bg);
}