/* ============================================================
   Darra GitLab 移动端适配 + 性能 UX (darra-ux-mobile.css)
   2026-08-04 · git.darra.xyz 工业 SCL 代码仓储
   只作用于移动端/小屏 (media query), 桌面端体验零影响
   ============================================================ */

/* ---------- 1. 移动端: 文件树抽屉化 ----------
   桌面端: 树正常显示; 移动端: 默认隐藏, 点右下角"目录"按钮展开
   body.darra-tree-open 由 JS 切换 (GitLab 19.2: aside[data-testid="project-page-sidebar"]) */
@media (max-width: 900px) {
  aside[data-testid="project-page-sidebar"],
  .project-page-sidebar {
    position: fixed !important;
    top: 48px;
    left: 0;
    bottom: 0;
    width: min(85vw, 340px);
    z-index: 1060;
    overflow-y: auto;
    background: var(--gl-background-color-base, #fff);
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.18);
    transform: translateX(-102%);
    transition: transform 0.22s ease;
    border-radius: 0 8px 8px 0;
    padding-bottom: 48px;
    max-height: none !important;
  }
  body.darra-tree-open aside[data-testid="project-page-sidebar"],
  body.darra-tree-open .project-page-sidebar {
    transform: translateX(0);
  }
  /* 遮罩 (用 fixed 伪元素, 由 JS 管理 visibility 切换) */
  body.darra-tree-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 1055;
    pointer-events: auto;
  }
}

/* ---------- 2. 移动端: 代码/表格横向滚动, 不撑破页面 ---------- */
@media (max-width: 900px) {
  .content .blob-content-holder,
  .content .diff-content,
  .content .table-responsive,
  .gl-table-wrap,
  .tree-holder,
  .content .file-content {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
  }
  .content .file-content pre,
  .content pre.code,
  .blob-content-holder pre {
    font-size: 12px;
    line-height: 1.45;
    padding: 8px;
    white-space: pre;
  }
  .gl-table {
    min-width: max-content;
  }
}

/* ---------- 3. 移动端: 触控优化 (按钮/间距) ---------- */
@media (max-width: 900px) {
  .content .btn,
  .content .gl-button,
  .top-bar .gl-button {
    min-height: 36px;
    padding-top: 6px;
    padding-bottom: 6px;
  }
  .gl-button.gl-button-icon-only {
    width: 38px;
    height: 38px;
  }
  .content .gl-link,
  .content a {
    -webkit-tap-highlight-color: rgba(30, 144, 255, 0.18);
  }
  .content .row,
  .content .gl-mb-3 {
    row-gap: 6px;
  }
  input, select, textarea, .gl-form-input, .gl-form-select {
    font-size: 16px; /* 防 iOS 聚焦自动放大 */
  }
}

/* ---------- 4. 移动端: 顶部导航简化 ---------- */
@media (max-width: 900px) {
  /* 隐藏次要入口, 保留汉堡 + 搜索 + 头像 */
  .navbar-gitlab .header-user-actions .header-help,
  .navbar-gitlab .gl-new-dropdown:not([data-testid="user-dropdown"]):not([data-testid="search-dropdown"]):not([data-testid="burger-menu"]),
  .navbar-gitlab .header-content .gl-button:not(.navbar-toggler) {
    display: none !important;
  }
  .navbar-gitlab .search-input-container,
  .navbar-gitlab .navbar-search {
    max-width: 200px !important;
    flex: 1 1 auto;
  }
  .top-bar {
    padding-left: 8px;
    padding-right: 8px;
  }
  .page-title h1,
  .page-title .title {
    font-size: 1.15rem !important;
  }
  /* 面包屑简化: 只留当前层级 */
  .breadcrumbs .breadcrumbs-list li:nth-last-child(n+3) {
    display: none !important;
  }
}

/* ---------- 5. 移动端: 抽屉按钮 (由 JS 生成) ---------- */
@media (max-width: 900px) {
  #darra-tree-fab {
    display: inline-flex !important;
    position: fixed;
    right: 14px;
    bottom: 16px;
    z-index: 1070;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    background: #1e90ff;
    color: #fff;
    font-size: 20px;
    line-height: 1;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    border: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    font-family: inherit;
  }
  #darra-tree-fab:active { background: #1878d6; }
}
@media (min-width: 901px) {
  #darra-tree-fab { display: none !important; }
}

/* ---------- 6. 加载骨架屏 (性能 UX) ----------
   html.darra-boot 时内容区显示 shimmer 占位, JS 在内容就绪后移除 */
html.darra-boot .content aside[data-testid="project-page-sidebar"],
html.darra-boot .content .tree-holder,
html.darra-boot .content .gl-table,
html.darra-boot .content .blob-content-holder {
  position: relative;
  color: transparent !important;
  overflow: hidden;
  background: #ececec !important;
  border-radius: 4px;
  min-height: 120px;
}
html.darra-boot .content aside[data-testid="project-page-sidebar"]::after,
html.darra-boot .content .tree-holder::after,
html.darra-boot .content .gl-table::after,
html.darra-boot .content .blob-content-holder::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.55) 50%, transparent 100%);
  transform: translateX(-100%);
  animation: darra-shimmer 1.1s infinite;
}
@keyframes darra-shimmer {
  100% { transform: translateX(100%); }
}
/* 骨架屏期间压住下方交互 (防误触) */
html.darra-boot .content {
  pointer-events: none;
}

/* ---------- 7. 通用: 图片/头像懒加载淡入 ---------- */
img[data-darra-lazy] {
  opacity: 0;
  transition: opacity 0.25s ease;
}
img[data-darra-lazy].darra-lazy-loaded {
  opacity: 1;
}