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.bi-hdd::before{content:"\f412"}
.bi-hdd-network::before{content:"\f40d"}
.bi-hourglass-split::before{content:"\f41f"}
.bi-house::before{content:"\f425"}
.bi-image::before{content:"\f42a"}
.bi-inbox::before{content:"\f42d"}
.bi-info-circle::before{content:"\f431"}
.bi-key::before{content:"\f44f"}
.bi-layers::before{content:"\f45b"}
.bi-layout-sidebar::before{content:"\f45f"}
.bi-link-45deg::before{content:"\f470"}
.bi-list::before{content:"\f479"}
.bi-list-task::before{content:"\f477"}
.bi-lock-fill::before{content:"\f47a"}
.bi-moon-stars::before{content:"\f496"}
.bi-music-note-beamed::before{content:"\f49e"}
.bi-palette::before{content:"\f4b1"}
.bi-pencil-square::before{content:"\f4ca"}
.bi-person::before{content:"\f4e1"}
.bi-plus-lg::before{content:"\f64d"}
.bi-question-circle::before{content:"\f505"}
.bi-search::before{content:"\f52a"}
.bi-share::before{content:"\f52e"}
.bi-shield-check::before{content:"\f52f"}
.bi-shield-lock::before{content:"\f538"}
.bi-sort-down::before{content:"\f575"}
.bi-sort-up::before{content:"\f57b"}
.bi-star::before{content:"\f588"}
.bi-stop-circle-fill::before{content:"\f590"}
.bi-sun::before{content:"\f5a2"}
.bi-tags::before{content:"\f5b2"}
.bi-three-dots::before{content:"\f5d4"}
.bi-three-dots-vertical::before{content:"\f5d3"}
.bi-trash::before{content:"\f5de"}
.bi-x-circle-fill::before{content:"\f622"}
.bi-x-lg::before{content:"\f659"}
/* =============================================================================
   Cloud Drive — Design System
   Flat, clean, maintainable. No Tailwind dependency.
   ============================================================================= */

/* --- Z-Index Zones ---
   To avoid stacking chaos, every z-index in the app must come from this scale.
    10 — Checkbox overlay, tooltip popups
    20 — Multi-action bar (sticky bottom)
    30 — App header (sticky top)
    50 — Upload panel, drag-drop overlay, download panel
    60 — Admin modals (lowest modal tier)
    70 — Admin choice modals
   100 — Regular app modals (dialogs)
   110 — Share result modals
   120 — Share expiry modals
   200 — Toast notifications
   300 — Right-click context menu
   ============================================================================= */

/* --- Design Tokens --- */
:root {
  --app-bg: #f8fafc;
  --app-surface: #ffffff;
  --app-surface-secondary: #f1f5f9;
  --app-surface-hover: #f8fafc;

  --app-border: #e2e8f0;
  --app-border-light: #f1f5f9;
  --app-border-hover: #cbd5e1;

  --app-text: #0f172a;
  --app-text-secondary: #475569;
  --app-text-muted: #94a3b8;

  --app-primary: #06b6d4;
  --app-primary-hover: #0891b2;
  --app-primary-text: #ffffff;
  --app-primary-bg-subtle: rgba(6,182,212,0.06);

  --app-danger: #ef4444;
  --app-danger-hover: #dc2626;
  --app-danger-text: #ffffff;
  --app-danger-bg-subtle: rgba(239,68,68,0.06);

  --app-success: #10b981;
  --app-success-hover: #059669;
  --app-success-text: #ffffff;
  --app-success-bg-subtle: rgba(16,185,129,0.06);

  --app-warning: #f59e0b;
  --app-warning-hover: #d97706;
  --app-warning-text: #92400e;
  --app-warning-bg: #fef3c7;

  --app-radius: 8px;
  --app-radius-sm: 6px;
  --app-radius-lg: 12px;
  --app-radius-xl: 12px;

  --app-shadow-sm: none;
  --app-shadow: none;
  --app-shadow-lg: none;
  --app-shadow-xl: none;
  /* 极简下唯一允许的浮层阴影：dialog / 上传 / 下载 / 详情浮层专用 */
  --app-shadow-float: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.08);

  /* 列表视图列宽唯一事实来源：卡片与列头共用，避免 641-1023px 对不齐 */
  --app-list-cols: 28px 32px minmax(0, 1fr) 92px 132px 132px auto;
  --app-list-cols--no-storage: 28px 32px minmax(0, 1fr) 92px 132px auto;

  --app-font: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --app-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', 'PingFang SC', 'Microsoft YaHei', monospace;

  --app-text-xs: 12px;
  --app-text-sm: 13px;
  --app-text-base: 14px;
  --app-text-lg: 16px;
  --app-text-xl: 20px;
  --app-text-2xl: 28px;

  --app-space-1: 4px;
  --app-space-2: 8px;
  --app-space-3: 12px;
  --app-space-4: 16px;
  --app-space-5: 20px;
  --app-space-6: 24px;
  --app-space-8: 32px;

  --app-ring: 0 0 0 3px rgba(6,182,212,0.2);

  --app-transition: 0.2s;
  --app-transition-slow: 0.3s;
}

/* --- Dark Theme（柔光版：降亮度、去霓虹，避免深底上刺眼） --- */
.dark {
  --app-bg: #101725;
  --app-surface: #1a2333;
  --app-surface-secondary: #212c40;
  --app-surface-hover: #273449;

  --app-border: #2f3b52;
  --app-border-light: #273244;
  --app-border-hover: #3d4c68;

  --app-text: #d3dbe5;
  --app-text-secondary: #9aa7ba;
  --app-text-muted: #6b7a90;

  --app-primary: #0ea5c0;
  --app-primary-hover: #0d8ea6;
  --app-primary-text: #ffffff;
  --app-primary-bg-subtle: rgba(14,165,192,0.13);

  --app-danger: #d97a7a;
  --app-danger-hover: #c96666;
  --app-danger-text: #ffffff;
  --app-danger-bg-subtle: rgba(217,122,122,0.13);

  --app-success: #58b894;
  --app-success-hover: #45a280;
  --app-success-text: #ffffff;
  --app-success-bg-subtle: rgba(88,184,148,0.13);

  --app-warning: #d9a94f;
  --app-warning-hover: #c39340;
  --app-warning-text: #eed9a4;
  --app-warning-bg: #3a2a12;

  --app-shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --app-shadow: 0 1px 4px rgba(0,0,0,0.25);
  --app-shadow-lg: 0 2px 8px rgba(0,0,0,0.3);
  --app-shadow-xl: 0 4px 16px rgba(0,0,0,0.3);

  --app-ring: 0 0 0 3px rgba(14,165,192,0.30);
}

/* --- Accent Themes（配色主题：html[data-accent]，置于 .dark 之后以覆盖主色） ---
   全站按钮 / logo / 高亮 / 链接 / 进度条均引用 var(--app-primary)，
   切换 data-accent 即整站换色；出厂默认曜石黑白（mono），青蓝（cyan）无覆盖块、沿用上方 tokens。 */
html[data-accent='violet'] {
  --app-primary: #8b5cf6;
  --app-primary-hover: #7c3aed;
  --app-primary-bg-subtle: rgba(139,92,246,0.08);
  --app-ring: 0 0 0 3px rgba(139,92,246,0.22);
}
html[data-accent='rose'] {
  --app-primary: #f43f5e;
  --app-primary-hover: #e11d48;
  --app-primary-bg-subtle: rgba(244,63,94,0.08);
  --app-ring: 0 0 0 3px rgba(244,63,94,0.22);
}
html[data-accent='emerald'] {
  --app-primary: #10b981;
  --app-primary-hover: #059669;
  --app-primary-bg-subtle: rgba(16,185,129,0.10);
  --app-ring: 0 0 0 3px rgba(16,185,129,0.25);
}
html[data-accent='orange'] {
  --app-primary: #f97316;
  --app-primary-hover: #ea580c;
  --app-primary-bg-subtle: rgba(249,115,22,0.10);
  --app-ring: 0 0 0 3px rgba(249,115,22,0.25);
}
/* 曜石黑白：浅色下墨黑按钮，深色下反转为月白按钮（保证对比度） */
html[data-accent='mono'] {
  --app-primary: #18181b;
  --app-primary-hover: #09090b;
  --app-primary-text: #fafafa;
  --app-primary-bg-subtle: rgba(24,24,27,0.06);
  --app-ring: 0 0 0 3px rgba(24,24,27,0.18);
}
html.dark[data-accent='mono'] {
  --app-primary: #c9d2dd;
  --app-primary-hover: #dde4ec;
  --app-primary-text: #1a2230;
  --app-primary-bg-subtle: rgba(201,210,221,0.10);
  --app-ring: 0 0 0 3px rgba(201,210,221,0.22);
}
/* 黑白主题下 logo 恒为黑底（明暗模式一致），切到其他配色则跟随主色 */
html[data-accent='mono'] .app-header__logo,
html[data-accent='mono'] .app-auth__logo-inner,
html[data-accent='mono'] .app-share .app-share-logo {
  background: #18181b;
  color: #fafafa;
}

/* --- 明暗切换平滑过渡 ---
   JS 在切换瞬间给 html 临时挂 .app-theme-anim（约 500ms 后摘除），
   期间全站颜色类属性柔和渐变，避免瞬间闪烁。
   平时不加全局 transition，避免按钮 hover 等交互变迟钝。
   原生滚动条 / 表单控件跟随 color-scheme 走，避免白边闪一下。 */
:root {
  color-scheme: light;
}
.dark {
  color-scheme: dark;
}
@media (prefers-reduced-motion: no-preference) {
  html.app-theme-anim,
  html.app-theme-anim *,
  html.app-theme-anim *::before,
  html.app-theme-anim *::after {
    transition-property: background-color, border-color, color, fill, stroke, box-shadow, outline-color !important;
    transition-duration: 0.45s !important;
    transition-timing-function: ease !important;
    transition-delay: 0ms !important;
  }
  /* 支持 View Transitions 的浏览器：新老截图交叉淡入，時長与上方逐属性渐变接近 */
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: 0.35s;
    animation-timing-function: ease;
  }
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
}

/* 防止 Android 移动端自动字体提升（font boosting）导致文字大小错乱 */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--app-font);
  font-size: var(--app-text-base);
  line-height: 1.6;
  color: var(--app-text);
  background: var(--app-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--app-primary); text-decoration: none; }
a:hover { color: var(--app-primary-hover); }
a:focus-visible { outline: 2px solid var(--app-primary); outline-offset: 2px; border-radius: 2px; }

input, select, textarea, button {
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

img { max-width: 100%; display: block; }

/* --- Layout: App Shell --- */
.app-shell {
  display: grid;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  gap: var(--app-space-5);
  padding: var(--app-space-5) var(--app-space-4);
  grid-template-columns: 280px minmax(0, 1fr);
  transition: grid-template-columns var(--app-transition-slow) ease;
}

@media (max-width: 1023px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
}

.app-shell--collapsed {
  grid-template-columns: 0px minmax(0, 1fr) !important;
}

.app-shell--collapsed .app-sidebar {
  display: none !important;
}

.app-shell--collapsed .app-main {
  grid-column: 1 / -1;
}

/* --- Header --- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--app-surface);
  border-bottom: 1px solid var(--app-border);
}

.app-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--app-space-3);
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--app-space-4);
}

.app-header__brand {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  flex-shrink: 0;
}

.app-header__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--app-radius);
  background: var(--app-primary);
  color: var(--app-primary-text);
  font-size: 16px;
  font-weight: 900;
}

.app-header__logo svg {
  width: 22px;
  height: 17px;
}

.app-header__title {
  font-size: var(--app-text-base);
  font-weight: 800;
  color: var(--app-text);
  white-space: nowrap;
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  margin-left: auto;
  flex-shrink: 0;
}

.app-header__actions .app-btn__label {
  margin-left: var(--app-space-1);
}

.app-header__search {
  flex: 1;
  max-width: 480px;
}

@media (max-width: 640px) {
  .app-header__search {
    order: 10;
    flex-basis: 100%;
  }
}

/* --- Sidebar --- */
.app-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--app-space-5);
  min-height: 0;
  overscroll-behavior: contain;
}
.app-sidebar > * {
  min-height: 0;
  /* 固定高度的 flex 列容器默认会压缩子项导致内容被裁且不触发滚动；
     禁止压缩，让超高内容走侧栏自身的 overflow-y 滚动。 */
  flex-shrink: 0;
}

@media (min-width: 1024px) {
  .app-sidebar {
    position: sticky;
    top: 7rem;
    height: calc(100vh - 9rem);
    max-height: calc(100vh - 9rem);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
    scrollbar-width: thin;
    scrollbar-color: var(--app-border) transparent;
  }
}

/* --- Main Content --- */
.app-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-4);
}

/* --- Panels --- */
.app-panel {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: var(--app-space-5);
}

.app-panel--sidebar {
  padding: var(--app-space-4);
}

/* 存储配额：汇总区与各后端明细之间以分隔线区分 */
#backend-quota-container {
  border-top: 1px solid var(--app-border);
  padding-top: var(--app-space-2);
  margin-top: var(--app-space-1);
  /* 账户多时配额列表内部滚动，避免把下方快捷管理顶出可视区 */
  max-height: min(32vh, 320px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
  padding-right: 4px;
}

/* 存储配额区块标题行：允许右侧配额摘要右对齐 */
#quota-section summary {
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
#quota-section summary .app-text-xs {
  letter-spacing: 0;
}

.app-panel--toolbar {
  padding: var(--app-space-4);
}

.app-panel--auth {
  padding: var(--app-space-8) var(--app-space-6);
}

.app-panel--nopad {
  padding: 0;
}

/* --- Section --- */
.app-section {
  margin-bottom: var(--app-space-4);
}

/* --- Buttons --- */
.app-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--app-space-1);
  height: 36px;
  padding: 0 var(--app-space-4);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface);
  color: var(--app-text-secondary);
  font-size: var(--app-text-xs);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: background var(--app-transition), border-color var(--app-transition), color var(--app-transition);
}

.app-btn:hover {
  background: var(--app-surface-secondary);
  border-color: var(--app-border-hover);
}

.app-btn:active {
  background: var(--app-surface-secondary);
}

.app-btn:focus-visible {
  outline: 2px solid var(--app-primary);
  outline-offset: 1px;
}

.app-btn--primary {
  background: var(--app-primary);
  border-color: var(--app-primary);
  color: var(--app-primary-text);
}

.app-btn--primary:hover {
  background: var(--app-primary-hover);
  border-color: var(--app-primary-hover);
}

.app-btn--accent {
  background: var(--app-primary);
  border-color: var(--app-primary);
  color: var(--app-primary-text);
}

.app-btn--accent:hover {
  background: var(--app-primary-hover);
  border-color: var(--app-primary-hover);
}

/* 极简收敛：accent / success / inverse 统一并入 primary 语义，保留类名仅做兼容别名 */
.app-btn--success,
.app-btn--inverse {
  background: var(--app-primary);
  border-color: var(--app-primary);
  color: var(--app-primary-text);
}

.app-btn--success:hover,
.app-btn--inverse:hover {
  background: var(--app-primary-hover);
  border-color: var(--app-primary-hover);
}

.app-btn--danger {
  background: var(--app-danger);
  border-color: var(--app-danger);
  color: var(--app-danger-text);
}

.app-btn--danger:hover {
  background: var(--app-danger-hover);
  border-color: var(--app-danger-hover);
}

.app-btn--warning {
  background: var(--app-warning-bg);
  border-color: var(--app-warning);
  color: var(--app-warning-text);
}

.app-btn--warning:hover {
  background: var(--app-warning-bg);
  border-color: var(--app-warning-hover);
  color: var(--app-warning-text);
}

.app-btn--ghost {
  border-color: transparent;
  background: transparent;
  color: var(--app-text-secondary);
  height: auto;
  padding: var(--app-space-1) var(--app-space-2);
}

.app-btn--ghost:hover {
  background: var(--app-surface-hover);
}

.app-btn--secondary {
  background: var(--app-surface);
  border-color: var(--app-border);
  color: var(--app-text-secondary);
}

.app-btn--secondary:hover {
  background: var(--app-surface-secondary);
  border-color: var(--app-border-hover);
  color: var(--app-text);
}

.app-btn--outline {
  color: var(--app-text);
  background: transparent;
}

.app-btn--outline-primary {
  border-color: var(--app-primary);
  color: var(--app-primary);
  background: transparent;
}

.app-btn--outline-primary:hover {
  background: var(--app-primary-bg-subtle);
}

.app-btn--outline-success {
  border-color: var(--app-primary);
  color: var(--app-primary);
  background: transparent;
}

.app-btn--outline-success:hover {
  background: var(--app-primary-bg-subtle);
}

.app-btn--outline-danger {
  border-color: var(--app-danger);
  color: var(--app-danger);
  background: transparent;
}

.app-btn--outline-danger:hover {
  background: var(--app-danger-bg-subtle);
}

.app-btn--inverse {
  background: var(--app-text);
  border-color: var(--app-text);
  color: var(--app-surface);
}

.app-btn--inverse:hover {
  opacity: 0.9;
}

.app-btn--full {
  display: block;
  width: 100%;
}

.app-btn--icon {
  width: 36px;
  padding: 0;
}

.app-btn--sm {
  height: 30px;
  padding: 0 var(--app-space-3);
  font-size: 11px;
}

.app-btn--xs {
  height: 26px;
  padding: 0 var(--app-space-2);
  font-size: 10px;
}

.app-btn:disabled,
.app-btn--disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- Inputs --- */
.app-input {
  display: block;
  width: 100%;
  height: 40px;
  padding: 0 var(--app-space-3);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface);
  color: var(--app-text);
  font-size: var(--app-text-sm);
  font-weight: 500;
  outline: none;
  transition: border-color var(--app-transition);
}

.app-input:focus {
  border-color: var(--app-primary);
}

.app-input:focus-visible {
  outline: 2px solid var(--app-primary);
  outline-offset: 1px;
}

.app-input::placeholder {
  color: var(--app-text-muted);
}

.app-input--sm {
  height: 34px;
  font-size: var(--app-text-xs);
}

.app-label {
  display: block;
  margin-bottom: var(--app-space-1);
  font-size: var(--app-text-xs);
  font-weight: 700;
  color: var(--app-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.app-select {
  display: block;
  width: 100%;
  height: 34px;
  padding: 0 var(--app-space-3);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface);
  color: var(--app-text);
  font-size: var(--app-text-xs);
  font-weight: 700;
  outline: none;
  cursor: pointer;
  transition: border-color var(--app-transition);
}

.app-select:focus {
  border-color: var(--app-primary);
}

.app-select:focus-visible {
  outline: 2px solid var(--app-primary);
  outline-offset: 1px;
}

.app-checkbox {
  width: 16px;
  height: 16px;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-sm);
  accent-color: var(--app-primary);
  cursor: pointer;
}

.app-checkbox:focus {
  outline: 2px solid var(--app-primary);
  outline-offset: 2px;
}

.app-checkbox-pos {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 10;
}

.app-main-div {
  cursor: pointer;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  padding-left: 28px;
  padding-top: 2px;
}

/* --- Select-all label (in toolbar) --- */
.app-select-all {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  cursor: pointer;
  user-select: none;
  font-size: var(--app-text-xs);
  font-weight: 700;
  color: var(--app-text-secondary);
  padding: var(--app-space-1) var(--app-space-3);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  transition: border-color var(--app-transition), background var(--app-transition);
}

.app-select-all:hover {
  border-color: var(--app-border-hover);
  background: var(--app-surface-hover);
}

/* --- Badges --- */
.app-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--app-space-1);
  padding: 1px var(--app-space-2);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-sm);
  background: var(--app-surface-secondary);
  color: var(--app-text-secondary);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}

.app-badge--success {
  border-color: transparent;
  background: var(--app-success-bg-subtle);
  color: var(--app-success-hover);
}

.dark .app-badge--success {
  border-color: transparent;
  background: var(--app-success-bg-subtle);
  color: #6ee7b7;
}

.app-badge--danger {
  border-color: transparent;
  background: var(--app-danger-bg-subtle);
  color: var(--app-danger-hover);
}

.dark .app-badge--danger {
  border-color: transparent;
  background: var(--app-danger-bg-subtle);
  color: #fca5a5;
}

.app-badge--warning {
  border-color: transparent;
  background: var(--app-warning-bg);
  color: var(--app-warning-text);
}

.dark .app-badge--warning {
  border-color: transparent;
  background: var(--app-warning-bg);
  color: #fcd34d;
}

.app-badge--info {
  border-color: transparent;
  background: var(--app-primary-bg-subtle);
  color: var(--app-primary-hover);
}

.dark .app-badge--info {
  border-color: transparent;
  background: var(--app-primary-bg-subtle);
  color: #67e8f9;
}

/* --- Cards --- */
.app-card {
  position: relative;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  user-select: none;
  cursor: default;
  transition: border-color var(--app-transition), background var(--app-transition);
}

.app-card:hover {
  border-color: var(--app-border-hover);
}

.app-card--grid {
  display: flex;
  flex-direction: column;
  gap: var(--app-space-2);
  padding: var(--app-space-4) var(--app-space-3) var(--app-space-3);
  min-height: 172px;
  overflow: hidden;
  border-radius: var(--app-radius-lg);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
  content-visibility: auto;
  contain-intrinsic-size: auto 172px;
  transition: transform var(--app-transition), box-shadow var(--app-transition), border-color var(--app-transition), background var(--app-transition);
}

@media (hover: hover) {
  .app-card--grid:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--app-primary) 45%, var(--app-border));
    box-shadow: 0 2px 4px rgba(15, 23, 42, 0.06), 0 12px 28px -8px rgba(15, 23, 42, 0.18);
    background: var(--app-surface);
  }
  .dark .app-card--grid:hover {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), 0 14px 30px -8px rgba(0, 0, 0, 0.5);
  }
}

.app-card--grid .app-main-div {
  padding-left: 0;
  padding-top: 0;
  justify-content: space-between;
}

/* 网格卡片头部容器：防止内容溢出挤压布局 */
.app-card__grid-head {
  min-width: 0;
}

/* 存储占用列表的单行容器 */
.app-quota-row {
  min-width: 0;
}

/* 网格卡片头部：放大图标，置于圆角底纹中 */
.app-card__grid-icon {
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 22px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--app-surface-secondary), var(--app-surface-hover));
  border: 1px solid var(--app-border-light);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
  transition: transform var(--app-transition), background var(--app-transition), border-color var(--app-transition);
}

.app-card__grid-icon i {
  font-size: 32px;
  line-height: 1;
  filter: drop-shadow(0 2px 3px rgba(15, 23, 42, 0.18));
}

@media (hover: hover) {
  .app-card--grid:hover .app-card__grid-icon {
    transform: scale(1.05);
  }
}

/* 网格收藏角标：缀于图标右上 */
.app-card__fav-ribbon {
  position: absolute;
  top: -7px;
  right: -7px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
  color: #fff;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  border-radius: 50%;
  border: 2px solid var(--app-surface);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.25);
}

/* 存储服务卡片：底纹叠加品牌色，保持一致又清晰 */
.app-card--storage-root .app-card__grid-icon {
  background: color-mix(in srgb, var(--storage-accent, #06b6d4) 20%, var(--app-surface-secondary));
  border-color: color-mix(in srgb, var(--storage-accent, #06b6d4) 38%, var(--app-border-light));
}

/* 网格卡片操作按钮：右上角悬浮，hover 时淡入 */
.app-card--grid .app-card__actions {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 11;
  margin: 0;
  flex-wrap: nowrap;
}

@media (hover: hover) {
  .app-card--grid .app-card__actions {
    opacity: 0;
    transform: translateY(-3px);
    transition: opacity var(--app-transition), transform var(--app-transition);
  }
  .app-card--grid:hover .app-card__actions,
  .app-card--grid:focus-within .app-card__actions {
    opacity: 1;
    transform: none;
  }
}

.app-card--grid .app-card__more-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  color: var(--app-text-secondary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.app-card--grid .app-card__more-btn:hover {
  background: var(--app-surface-hover);
  border-color: var(--app-border-hover);
  color: var(--app-text);
}

/* 网格卡片底部元信息：安静单行（大小 · 时间），分享徽标点缀 */
.app-card__grid-meta {
  flex-wrap: wrap;
  justify-content: center;
  min-width: 0;
  max-width: 100%;
  row-gap: 4px;
}

/* 存储位置徽标在网格下隐藏（列表视图仍可见），避免拥挤 */
.app-card__grid-meta .app-badge--meta-storage {
  display: none;
}

.app-card__grid-meta .app-badge--meta-size {
  background: none;
  border: none;
  padding: 0;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--app-text-muted);
  white-space: nowrap;
}

.app-card__grid-meta .app-badge--meta-size::after {
  content: '·';
  margin-left: 6px;
  opacity: 0.6;
}

.app-card__grid-meta .app-card__time {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: 11px;
  color: var(--app-text-muted);
}



.app-card--list {
  display: grid;
  grid-template-areas: "chk icon name size storage time actions";
  grid-template-columns: var(--app-list-cols);
  align-items: center;
  column-gap: var(--app-space-3);
  row-gap: var(--app-space-2);
  padding: var(--app-space-2) var(--app-space-3);
  line-height: 1.5;
  content-visibility: auto;
  contain-intrinsic-size: auto 52px;
}

/* --- List row aligned cells (Google Drive style) --- */
.app-card__checkbox {
  grid-area: chk;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.app-card__icon {
  grid-area: icon;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.app-card__name {
  grid-area: name;
  min-width: 0;
  overflow: hidden;
}

.app-card__name .app-badge--hit {
  border-color: var(--app-primary);
  background: var(--app-primary-bg-subtle);
  color: var(--app-primary);
}

.app-card__size {
  grid-area: size;
  color: var(--app-text-muted);
  font-size: 12px;
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-card__storage {
  grid-area: storage;
  color: var(--app-text-muted);
  font-size: 12px;
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-card__time {
  grid-area: time;
  color: var(--app-text-muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-card__actions {
  grid-area: actions;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--app-space-1);
  flex-wrap: nowrap;
  min-width: 0;
}

/* 列表行信息单元整块可点击（打开文件/文件夹） */
.app-card--list .app-card__cell-clickable {
  cursor: pointer;
}
.app-card--list .app-card__cell-clickable:hover {
  color: var(--app-text);
}

.app-card__actions .app-btn {
  flex-shrink: 0;
  padding: var(--app-space-1) var(--app-space-2);
}

.app-card--grid .app-card__actions {
  margin-top: 0;
  flex-wrap: nowrap;
}

.app-card--list .app-card__checkbox .app-checkbox {
  margin: 0;
}

.app-card--checked {
  border-color: var(--app-primary);
  outline: 2px solid var(--app-primary);
  outline-offset: -1px;
  background: color-mix(in srgb, var(--app-primary) 6%, transparent);
}

/* 网格视图文件名最多两行，超出省略 */
.app-card__name--grid {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  -webkit-box-align: center;
  align-items: center;
  overflow: hidden;
  word-break: break-all;
}

.dark .app-card--checked {
  background: color-mix(in srgb, var(--app-primary) 14%, transparent);
}

/* 网格复选框：有悬停能力的设备上默认半隐，悬停/选中/聚焦时显现 */
@media (hover: hover) {
  .app-card--grid .app-checkbox-pos {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity var(--app-transition), transform var(--app-transition);
  }
  .app-card--grid:hover .app-checkbox-pos,
  .app-card--grid:focus-within .app-checkbox-pos,
  .app-card--grid.app-card--checked .app-checkbox-pos {
    opacity: 1;
    transform: none;
  }
}

/* 键盘导航焦点环（不影响布局） */
.app-card:focus-visible {
  outline: 2px solid var(--app-primary);
  outline-offset: -1px;
  border-color: var(--app-primary);
}

.app-card--drag-hover {
  border-color: var(--app-primary);
  background: rgba(59,130,246,0.05);
}

.app-card--storage-root {
  border-color: rgba(6, 182, 212, 0.3);
  border-color: color-mix(in srgb, var(--storage-accent, #06b6d4) 30%, transparent);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.04), rgba(6, 182, 212, 0.02));
  background: linear-gradient(135deg, color-mix(in srgb, var(--storage-accent, #06b6d4) 4%, transparent), color-mix(in srgb, var(--storage-accent, #06b6d4) 2%, transparent));
}

.app-card--grid.app-card--storage-root::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--storage-accent, #06b6d4);
}

.dark .app-card--storage-root {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(6, 182, 212, 0.05));
  background: linear-gradient(135deg, color-mix(in srgb, var(--storage-accent, #06b6d4) 10%, transparent), color-mix(in srgb, var(--storage-accent, #06b6d4) 5%, transparent));
}

.app-card--storage-root:hover {
  border-color: color-mix(in srgb, var(--storage-accent, #06b6d4) 60%, transparent);
}

/* --- List View --- */
.app-list-item {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  padding: var(--app-space-3);
  border-bottom: 1px solid var(--app-border-light);
  min-width: 0;
  transition: background var(--app-transition);
}

.app-list-item:last-child {
  border-bottom: none;
}

.app-list-item:hover {
  background: var(--app-surface-hover);
}

/* --- Toolbar --- */
.app-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--app-space-3);
}

.app-toolbar__left {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  min-width: 0;
  flex: 1;
}

.app-toolbar__right {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
}

.app-toolbar__group {
  display: flex;
  align-items: center;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  overflow: hidden;
}

.app-toolbar__group .app-btn {
  border: none;
  border-radius: 0;
  height: 32px;
}

.app-toolbar__group .app-btn--active {
  background: var(--app-surface);
  color: var(--app-primary);
}

.app-toolbar__group .app-btn:not(.app-btn--active) {
  background: transparent;
  color: var(--app-text-muted);
}

.app-toolbar__group .app-btn:not(.app-btn--active):hover {
  color: var(--app-text-secondary);
}

/* --- Sort Button Arrows --- */
.app-sort-arrow {
  display: inline-block;
  vertical-align: middle;
  margin-top: -1px;
}

/* --- Sidebar Sections (Recent Files, Share Management) --- */
.app-sidebar-section {
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  background: var(--app-surface);
  overflow: hidden;
}

.app-sidebar-section details {
  display: flex;
  flex-direction: column;
}

.app-sidebar-section summary {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: var(--app-space-3) var(--app-space-4);
  cursor: pointer;
  font-size: var(--app-text-xs);
  font-weight: 700;
  color: var(--app-text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  user-select: none;
  list-style: none;
}

.app-sidebar-section summary::-webkit-details-marker {
  display: none;
}

.app-sidebar-section summary::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M4 1v3H1v2h3v3h2V6h3V4H6V1Z'/%3E%3C/svg%3E") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M4 1v3H1v2h3v3h2V6h3V4H6V1Z'/%3E%3C/svg%3E") center/contain no-repeat;
  transition: transform var(--app-transition);
}

.app-sidebar-section details[open] summary::before {
  transform: rotate(45deg);
}

.app-sidebar-section__content {
  padding: 0 var(--app-space-4) var(--app-space-3);
}

/* 展开的区块标题底部加分隔线，强化区块边界 */
.app-sidebar-section details[open] > summary {
  border-bottom: 1px solid var(--app-border);
  margin-bottom: var(--app-space-2);
}

.app-sidebar-section .app-btn {
  width: 100%;
  justify-content: center;
}

/* --- 存储占用情况面板（左右布局） --- */
.app-storage-usage__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--app-space-2);
  padding-bottom: var(--app-space-3);
  margin-bottom: var(--app-space-3);
  border-bottom: 1px solid var(--app-border-light);
}

.app-storage-usage__header-title {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--app-text-muted);
}

.app-storage-usage {
  display: flex;
  align-items: stretch;
  gap: var(--app-space-4);
  max-height: calc(100vh - 17rem);
  min-height: 380px;
  overflow: hidden;
}

.app-storage-usage__nav {
  width: 280px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-3);
  border-right: 1px solid var(--app-border);
  padding-right: var(--app-space-3);
  min-height: 0;
}

.app-storage-usage__total {
  background: var(--app-surface-2, var(--app-surface));
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  padding: var(--app-space-3) var(--app-space-4);
  flex-shrink: 0;
}

.app-storage-usage__nav-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-1);
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
}

.app-storage-usage__nav-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--app-space-2) var(--app-space-3);
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  border-radius: var(--app-radius);
  cursor: pointer;
  transition: background var(--app-transition), border-color var(--app-transition);
}

.app-storage-usage__nav-item:hover {
  background: var(--app-surface-secondary);
}

.app-storage-usage__nav-item.is-active {
  background: var(--app-surface-2, var(--app-surface));
  border-left-color: var(--app-primary);
}

.app-storage-usage__nav-item__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--app-space-2);
  min-width: 0;
}

.app-storage-usage__nav-item__name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--app-text);
  min-width: 0;
}

.app-storage-usage__nav-item__name > span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-storage-usage__nav-item__pct {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--app-text-secondary);
}

.app-storage-usage__nav-item__bar {
  height: 4px;
}

.app-storage-usage__nav-item__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--app-space-2);
  font-size: 10px;
  color: var(--app-text-muted);
}

.app-storage-usage__detail {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-3);
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
}

.app-storage-usage__detail-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--app-space-2);
}

.app-storage-usage__detail-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: var(--app-radius);
  background: var(--app-surface-2, var(--app-surface));
  border: 1px solid var(--app-border);
  font-size: 15px;
}

.app-storage-usage__detail-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--app-text);
  min-width: 0;
}

.app-storage-usage__chip {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 600;
  color: var(--app-primary);
  background: color-mix(in srgb, var(--app-primary) 12%, transparent);
  border-radius: 999px;
  padding: 2px 8px;
}

.app-storage-usage__chip--muted {
  color: var(--app-text-muted);
  background: var(--app-surface-secondary);
}

.app-storage-usage__bar {
  height: 10px;
}

.app-storage-usage__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--app-space-2);
}

.app-storage-usage__stat {
  background: var(--app-surface-2, var(--app-surface));
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  padding: var(--app-space-2) var(--app-space-3);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.app-storage-usage__stat-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--app-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.app-storage-usage__stat-label {
  font-size: 10px;
  color: var(--app-text-muted);
}

.app-storage-usage__table {
  background: var(--app-surface-2, var(--app-surface));
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  overflow: hidden;
}

.app-storage-usage__table table {
  width: 100%;
  border-collapse: collapse;
}

.app-storage-usage__table th {
  text-align: left;
  padding: 8px var(--app-space-4);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--app-text-muted);
  border-bottom: 1px solid var(--app-border);
  background: var(--app-surface-2, var(--app-surface));
}

.app-storage-usage__table td {
  padding: 8px var(--app-space-4);
  font-size: 12px;
  color: var(--app-text-secondary);
  border-bottom: 1px solid var(--app-border-light);
}

.app-storage-usage__table tbody tr:last-child td {
  border-bottom: none;
}

.app-storage-usage__table tbody tr:hover td {
  background: var(--app-surface-secondary);
}

.app-storage-usage__role {
  display: inline-block;
  margin-left: 6px;
  font-size: 10px;
  font-weight: 600;
  color: var(--app-text-muted);
  background: var(--app-surface-secondary);
  border-radius: 999px;
  padding: 1px 6px;
  vertical-align: 1px;
}

.app-storage-usage__role--self {
  color: var(--app-success);
  background: color-mix(in srgb, var(--app-success) 12%, transparent);
}

.app-storage-usage__num {
  text-align: right;
  white-space: nowrap;
}

.app-storage-usage__empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--app-space-1);
  font-size: 13px;
  color: var(--app-text-muted);
  text-align: center;
}

@media (max-width: 640px) {
  .app-storage-usage {
    flex-direction: column;
    max-height: none;
    min-height: 0;
  }
  .app-storage-usage__nav {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--app-border);
    padding-right: 0;
    padding-bottom: var(--app-space-2);
  }
  .app-storage-usage__nav-list {
    max-height: 180px;
    flex: none;
  }
}

/* --- Recent Files --- */
.recent-files-panel-list {
  max-height: min(420px, 60vh);
  overflow-y: auto;
}
.app-recent-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  padding: var(--app-space-1);
  background: var(--app-surface-secondary);
  overflow: hidden;
}

.app-recent-item + .app-recent-item {
  border-top: 1px solid var(--app-border);
}

.app-recent-item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: var(--app-space-2);
  border-radius: var(--app-radius);
  cursor: pointer;
  transition: background var(--app-transition);
  min-width: 0;
}

.app-recent-item:hover {
  background: var(--app-surface-secondary);
}

.app-recent-item__icon {
  flex-shrink: 0;
  font-size: 14px;
  line-height: 1;
}

.app-recent-item__name {
  font-size: 13px;
  font-weight: 600;
  color: var(--app-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.app-recent-item__time {
  flex-shrink: 0;
  font-size: 11px;
  color: var(--app-text-muted);
  white-space: nowrap;
}

.app-recent-empty {
  font-size: 13px;
  color: var(--app-text-muted);
  text-align: center;
  padding: var(--app-space-3) 0;
}

/* --- Breadcrumb --- */
.app-breadcrumb {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
}

.app-breadcrumb__item {
  color: var(--app-text-secondary);
  font-size: var(--app-text-sm);
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 130px;
  transition: color var(--app-transition);
}

.app-breadcrumb__item:hover {
  color: var(--app-primary);
}

.app-breadcrumb__current {
  color: var(--app-text);
  font-weight: 800;
  font-size: var(--app-text-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.app-breadcrumb__sep {
  color: var(--app-text-muted);
  font-size: var(--app-text-xs);
  user-select: none;
  flex-shrink: 0;
}

/* --- Search --- */
.app-search {
  position: relative;
  flex: 1;
  min-width: 0;
}

.app-search__icon {
  position: absolute;
  left: var(--app-space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--app-text-muted);
  font-size: var(--app-text-sm);
  pointer-events: none;
}

.app-search__input {
  width: 100%;
  height: 38px;
  padding: 0 var(--app-space-3) 0 34px;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface);
  color: var(--app-text);
  font-size: var(--app-text-sm);
  font-weight: 500;
  outline: none;
  transition: border-color var(--app-transition);
}

.app-search__input:focus {
  border-color: var(--app-primary);
}

.app-search__input:focus-visible {
  outline: 2px solid var(--app-primary);
  outline-offset: 1px;
}

.app-search__input::placeholder {
  color: var(--app-text-muted);
}

/* --- Action Bar --- */
.app-action-bar {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: var(--app-space-4);
}

/* 内联操作栏（并入工具栏面板）：未选中显示 [全选/新建/上传]，选中显示批量操作 */
.app-action-bar--inline {
  border: none;
  border-radius: 0;
  padding: var(--app-space-3) 0 0;
  margin-top: var(--app-space-3);
  border-top: 1px solid var(--app-border-light);
}

.app-action-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: var(--app-space-3);
}

.app-action-bar__main {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  min-width: 0;
  flex-shrink: 0;
}

.app-action-bar__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--app-space-2);
  margin-left: auto;
  min-width: 0;
}

.app-action-bar__group {
  display: contents;
}

.app-action-bar__group .app-btn {
  flex-shrink: 0;
  white-space: nowrap;
}

.app-action-bar__count {
  display: inline-flex;
  align-items: center;
  padding: var(--app-space-1) var(--app-space-2);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface-secondary);
  color: var(--app-text-secondary);
  font-size: var(--app-text-xs);
  font-weight: 700;
  white-space: nowrap;
}

/* 选中态：操作栏按钮统一为中性样式（仅删除保留红色），消除主按钮扎堆的杂乱感 */
body.app-has-selection .app-action-bar .app-btn--primary,
body.app-has-selection .app-action-bar .app-btn--outline-primary {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  color: var(--app-text);
}
body.app-has-selection .app-action-bar .app-btn--primary:hover,
body.app-has-selection .app-action-bar .app-btn--outline-primary:hover {
  background: var(--app-surface-hover);
  border-color: var(--app-border-hover);
  color: var(--app-text);
}

/* --- Dialogs / Modals --- */
/* --- Admin modal overlay gets its own z-index zone (60) so popups on top (70-80) work --- */
#admin-modal {
  z-index: 60;
}
#admin-modal .app-dialog {
  contain: content;
}
/* --- 后台管理：左侧导航 + 右侧标签页布局 --- */
#admin-modal .app-admin-layout {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
#admin-modal .app-admin-nav {
  width: 172px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-1);
  padding: var(--app-space-3);
  border-right: 1px solid var(--app-border-light);
  background: var(--app-surface-secondary);
  overflow-y: auto;
}
#admin-modal .app-admin-nav__item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--app-radius);
  background: transparent;
  color: var(--app-text);
  font-size: 13px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: background var(--app-transition), color var(--app-transition);
}
#admin-modal .app-admin-nav__item:hover {
  background: rgba(127, 127, 127, 0.1);
}
#admin-modal .app-admin-nav__item--active {
  background: var(--app-primary);
  border-color: var(--app-primary);
  color: #fff;
}
#admin-modal .app-admin-content {
  flex: 1;
  min-width: 0;
  padding: var(--app-space-5);
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
}
#admin-modal .app-admin-panel {
  display: none;
}
#admin-modal .app-admin-panel--active {
  display: block;
}
@media (max-width: 767px) {
  #admin-modal .app-admin-layout {
    flex-direction: column;
    overflow-y: auto;
  }
  #admin-modal .app-admin-nav {
    width: 100%;
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--app-border-light);
    overflow-x: auto;
    padding: var(--app-space-2);
  }
  #admin-modal .app-admin-nav__item {
    white-space: nowrap;
  }
  #admin-modal .app-admin-content {
    overflow: visible;
    padding: var(--app-space-4);
  }
}

/* --- Dialog level z-index classes --- */
.app-z-modal { z-index: 60; }
.app-z-modal-popup { z-index: 70; }
.app-z-modal-choice { z-index: 80; }
.app-z-modal-share { z-index: 110; }
.app-z-modal-share-expiry { z-index: 120; }

.app-dialog-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--app-space-4);
  background: rgba(15,23,42,0.5);
  overflow-y: auto;
}

.app-dialog {
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  overflow: hidden;
  box-shadow: var(--app-shadow-float);
  animation: app-scale-in var(--app-transition) ease;
}

.app-dialog--sm { max-width: 400px; }
.app-dialog--md { max-width: 560px; }
.app-dialog--lg { max-width: 720px; }
.app-dialog--xl { max-width: 960px; }
.app-dialog--full { max-width: 1152px; }

.app-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--app-space-3);
  padding: var(--app-space-5);
  border-bottom: 1px solid var(--app-border-light);
}

/* 标题 + 副标题同行布局：大标题/小标题/徽标横向排列，自动换行 */
.app-dialog__header-block {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--app-space-2);
  min-width: 0;
}

.app-dialog__header-text {
  font-size: 11px;
  font-weight: 800;
  color: var(--app-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.app-dialog__title {
  font-size: var(--app-text-base);
  font-weight: 800;
  color: var(--app-text);
}

.app-dialog__body {
  flex: 1;
  overflow-y: auto;
  padding: var(--app-space-4) var(--app-space-5);
}

.app-dialog__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--app-space-2);
  padding: var(--app-space-4) var(--app-space-5);
  border-top: 1px solid var(--app-border-light);
}

.app-dialog__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--app-radius);
  background: var(--app-surface-secondary);
  color: var(--app-text-muted);
  font-size: var(--app-text-base);
  font-weight: 700;
  cursor: pointer;
  transition: background var(--app-transition), color var(--app-transition);
}

.app-dialog__close:hover {
  background: var(--app-border);
  color: var(--app-text);
}

/* --- File Grid --- */
.app-file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: var(--app-space-4);
  min-height: 360px;
  align-content: start;
}

/* ── 响应式按钮收拢：以文件区容器宽度为基准自动切换 ── */
.app-file-grid,
.app-file-grid--list {
  container-type: inline-size;
  container-name: file-grid;
}

/* 网格视图：操作始终收拢为单个"更多"按钮 */
.app-card--grid .app-card__actions .app-btn:not(.app-card__more-btn) {
  display: none;
}

/* 列表视图：行内仅 3-4 个核心按钮，"更多"常驻以收纳次要操作（版本/标签等） */
.app-card--list .app-card__more-btn {
  display: inline-flex;
}
/* 行内按钮收紧，长文件名优先保证可读（省略号截断不断行） */
.app-card--list .app-card__actions {
  flex-shrink: 0;
  max-width: 220px;
}
.app-card--list .app-card__name,
.app-card--list .app-card__name .app-text-sm {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 窄容器（窗口变窄 / 手机端）：列表操作按钮自动收起为"更多"按钮 */
@container file-grid (max-width: 920px) {
  .app-card--list .app-card__actions .app-btn:not(.app-card__more-btn) {
    display: none;
  }
  .app-card--list .app-card__more-btn {
    display: inline-flex;
  }
}

/* 不支持容器查询的旧浏览器回退：≤640px 视口仍收拢 */
@supports not (container-type: inline-size) {
  @media (max-width: 640px) {
    .app-card--list .app-card__actions .app-btn:not(.app-card__more-btn) {
      display: none;
    }
    .app-card--list .app-card__more-btn {
      display: inline-flex;
    }
  }
}

.app-file-grid--list {
  display: flex;
  flex-direction: column;
  gap: var(--app-space-2);
}

/* --- Table wrapper for horizontal scroll on small screens --- */
.app-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
}

.app-table-wrap .app-table {
  border: none;
  border-radius: 0;
}

/* --- Table --- */
.app-table {
  width: 100%;
  border-collapse: collapse;
}

.app-table th {
  padding: var(--app-space-4);
  background: var(--app-surface-secondary);
  border-bottom: 1px solid var(--app-border);
  color: var(--app-text-muted);
  font-size: var(--app-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
}

.app-table-row {
  border-bottom: 1px solid var(--app-border-light);
  font-size: var(--app-text-xs);
  font-weight: 700;
  color: var(--app-text-secondary);
}

.app-table-row:hover {
  background: var(--app-surface-hover);
}

.app-td {
  padding: var(--app-space-2) var(--app-space-3);
}

.app-table td {
  padding: var(--app-space-4);
  border-bottom: 1px solid var(--app-border-light);
  font-size: var(--app-text-xs);
  color: var(--app-text-secondary);
}

.app-table tr:last-child td {
  border-bottom: none;
}

/* --- Progress Bars --- */
.app-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--app-surface-secondary);
  overflow: hidden;
}

.app-progress__bar {
  height: 100%;
  border-radius: 999px;
  background: var(--app-primary);
  transition: width 0.3s ease;
}

.app-progress__bar--danger,
.app-progress__bar--error {
  background: var(--app-danger);
}

.app-progress__bar--success {
  background: var(--app-success);
}

/* --- Empty State --- */
.app-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--app-space-8) var(--app-space-4);
  color: var(--app-text-muted);
  gap: var(--app-space-4);
  min-height: 240px;
  grid-column: 1 / -1;
}

.app-empty-state__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--app-primary-bg-subtle);
  border: 1px solid var(--app-border-light);
  color: var(--app-primary);
  font-size: 28px;
  margin-bottom: var(--app-space-1);
}

.app-empty-state__text {
  font-size: var(--app-text-sm);
  font-weight: 600;
  color: var(--app-text-secondary);
  letter-spacing: 0.02em;
}

.app-empty-state__hint {
  font-size: var(--app-text-xs);
  color: var(--app-text-muted);
  max-width: 280px;
  text-align: center;
}

.app-empty-state__action {
  margin-top: var(--app-space-1);
}

/* --- Toast --- */
.app-toast-container {
  position: fixed;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-2);
  width: 100%;
  max-width: 24rem;
  padding: 0 1.5rem;
  pointer-events: none;
}

.app-toast {
  padding: var(--app-space-3) var(--app-space-4);
  border-radius: var(--app-radius-lg);
  background: var(--app-text);
  font-size: var(--app-text-xs);
  font-weight: 700;
  line-height: 1.5;
  color: var(--app-surface);
  text-align: center;
  max-width: 100%;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  white-space: normal;
  overflow-wrap: anywhere;
  animation: app-toast-in 0.25s ease;
  pointer-events: auto;
}

.app-toast__text {
  display: inline;
}

/* 中文标题不做全大写与宽字距：中文无大小写，撑散反而难读 */
:lang(zh) .app-label,
:lang(zh) .app-sidebar-section summary,
:lang(zh) .app-dialog__header-text,
:lang(zh) .app-table th,
:lang(zh) .app-list-head,
:lang(zh) .app-share-item__type {
  text-transform: none;
  letter-spacing: 0;
}

.app-toast--success {
  background: var(--app-success);
  color: #fff;
}

.app-toast--error {
  background: var(--app-danger);
  color: #fff;
}

.app-toast--info {
  background: var(--app-text);
  color: var(--app-surface);
}

.app-toast--hiding {
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* --- Upload Progress Container --- */
.app-upload-progress {
  position: fixed;
  bottom: var(--app-space-5);
  right: var(--app-space-5);
  z-index: 50;
  width: min(92vw, 440px);
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: var(--app-space-4);
  box-shadow: var(--app-shadow-float);
}

.app-upload-item {
  background: var(--app-surface);
  border: 1px solid var(--app-border-light);
  border-radius: var(--app-radius);
  padding: var(--app-space-2) var(--app-space-3);
}

.app-upload-progress--hidden {
  display: none;
}

/* --- App Zone (the main wrapper after login) --- */
.app-zone {
  min-height: 100dvh;
}

/* --- Auth Zone --- */
.app-auth {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--app-space-4);
  background:
    radial-gradient(640px 340px at 15% -5%, rgba(6,182,212,0.07), transparent 70%),
    radial-gradient(560px 320px at 95% 105%, rgba(59,130,246,0.06), transparent 70%);
}

.app-auth__inner {
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.app-auth__logo {
  display: flex;
  justify-content: center;
}

.app-auth__logo-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--app-radius-lg);
  background: var(--app-primary);
  color: var(--app-primary-text);
}

.app-auth__logo-inner svg {
  width: 30px;
  height: 23px;
}

.app-auth__tagline {
  margin-top: var(--app-space-2);
  font-size: var(--app-text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--app-text-muted);
}

.app-auth__title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--app-text);
  margin-top: var(--app-space-5);
}

.app-auth__tabs {
  display: flex;
  gap: var(--app-space-2);
  margin-top: var(--app-space-6);
  padding: var(--app-space-1);
  background: var(--app-surface-secondary);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
}

.app-auth__tab {
  flex: 1;
  padding: var(--app-space-2) var(--app-space-3);
  border: none;
  border-radius: calc(var(--app-radius) - 2px);
  background: transparent;
  color: var(--app-text-muted);
  font-size: var(--app-text-sm);
  font-weight: 800;
  cursor: pointer;
  transition: background var(--app-transition), color var(--app-transition);
}

.app-auth__tab--active {
  background: var(--app-primary);
  color: var(--app-primary-text);
}

.app-auth__panel {
  display: flex;
  flex-direction: column;
  gap: var(--app-space-4);
  margin-top: var(--app-space-5);
}

.app-auth__field {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  text-align: left;
}

.app-auth__field-label {
  flex-shrink: 0;
  width: 5em;
  font-size: var(--app-text-sm);
  font-weight: 700;
  color: var(--app-text);
}

.app-auth__field .app-input {
  flex: 1;
  min-width: 0;
}

.app-auth__hint {
  font-size: 11px;
  font-weight: 600;
  color: var(--app-text-muted);
  text-align: left;
}

.app-auth__hint--error {
  color: var(--app-danger);
}

.app-auth__auth-switch {
  margin-top: 12px;
  text-align: center;
  font-size: 12px;
}

.app-auth__auth-switch a {
  color: var(--app-primary);
  text-decoration: none;
  cursor: pointer;
}

.app-auth__auth-switch a:hover {
  text-decoration: underline;
}

/* --- Global Busy Overlay --- */
.app-busy-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--app-transition);
}

.app-busy-overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

.app-busy-overlay__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--app-space-3);
  padding: var(--app-space-6) var(--app-space-8);
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  box-shadow: var(--app-shadow-lg);
  min-width: 180px;
  text-align: center;
}

.app-busy-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--app-border);
  border-top-color: var(--app-primary);
  border-radius: 50%;
  animation: app-spin 0.8s linear infinite;
}

.app-busy-overlay__text {
  font-size: 13px;
  font-weight: 700;
  color: var(--app-text);
}

@media (prefers-reduced-motion: reduce) {
  .app-busy-spinner {
    animation-duration: 2s;
  }
}

/* --- Drag-Drop Overlay --- */
.app-drag-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  margin: var(--app-space-3);
  border: 2px dashed var(--app-primary);
  border-radius: var(--app-radius-lg);
  background: rgba(6,182,212,0.04);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--app-transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-drag-overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

.app-drag-overlay__inner {
  text-align: center;
  padding: var(--app-space-6);
}

.app-drag-overlay__icon {
  font-size: 36px;
  margin-bottom: var(--app-space-3);
}

.app-drag-overlay__text {
  font-size: var(--app-text-sm);
  font-weight: 700;
  color: var(--app-primary);
}

.app-drag-overlay__hint {
  font-size: 11px;
  font-weight: 500;
  color: var(--app-text-muted);
  margin-top: var(--app-space-1);
}

/* --- File Progress Items --- */
.app-file-progress-list {
  max-height: 260px;
  overflow-y: auto;
  margin-top: var(--app-space-4);
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
}

.app-file-progress-list::-webkit-scrollbar {
  width: 6px;
}

.app-file-progress-list::-webkit-scrollbar-track {
  background: transparent;
}

.app-file-progress-list::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: var(--app-border);
}

.app-file-progress-item {
  padding: var(--app-space-3);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  margin-bottom: var(--app-space-2);
  background: var(--app-surface);
}

/* --- Skeleton Loading --- */
.app-skeleton {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  padding: var(--app-space-4);
  animation: app-pulse 1.5s ease-in-out infinite;
  content-visibility: auto;
  contain-intrinsic-size: auto 156px;
}

.app-skeleton--card {
  min-height: 156px;
  display: flex;
  flex-direction: column;
  gap: var(--app-space-2);
}

.app-skeleton__line {
  height: 14px;
  border-radius: var(--app-radius-sm);
  background: var(--app-surface-secondary);
  margin-bottom: var(--app-space-3);
}

.app-skeleton__line:last-child {
  width: 50%;
}

.app-skeleton--h-120 {
  height: 120px;
}

.app-skeleton--w-66 {
  width: 66%;
}

.app-skeleton--w-50 {
  width: 50%;
}

/* --- Details / Collapsible --- */
.app-details {
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface);
  overflow: hidden;
}

.app-details__summary {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: var(--app-space-3) var(--app-space-4);
  background: var(--app-surface-secondary);
  font-weight: 700;
  font-size: var(--app-text-sm);
  color: var(--app-text);
  cursor: pointer;
  list-style: none;
}

.app-details__summary::-webkit-details-marker {
  display: none;
}

.app-details__arrow {
  margin-left: auto;
  font-size: var(--app-text-xs);
  color: var(--app-text-muted);
  transition: transform var(--app-transition);
}

.app-details[open] .app-details__arrow {
  transform: rotate(180deg);
}

.app-details__body {
  padding: var(--app-space-4);
}

/* --- Shared Assets Manager --- */
.app-share-item {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--app-space-3);
  padding: var(--app-space-4);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  margin-bottom: var(--app-space-3);
  transition: border-color var(--app-transition);
}

.app-share-item:hover {
  border-color: var(--app-border-hover);
}

.app-share-item__info {
  min-width: 0;
}

.app-share-item__type {
  font-size: 11px;
  font-weight: 700;
  color: var(--app-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.app-share-item__name {
  font-size: var(--app-text-sm);
  font-weight: 800;
  color: var(--app-text);
  margin-top: var(--app-space-1);
  word-break: break-all;
}

.app-share-item__expiry {
  font-size: 11px;
  color: var(--app-text-muted);
  margin-top: var(--app-space-1);
}

.app-share-item__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--app-space-2);
}

/* --- Utility Classes --- */
.app-hidden { display: none !important; }
.app-opacity-0 { opacity: 0; }
.app-opacity-50 { opacity: 0.5; }
.app-pointer-events-none { pointer-events: none; }
.app-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.app-break-all { word-break: break-all; }
.app-whitespace-nowrap { white-space: nowrap; }

/* Flex utilities */
.app-flex { display: flex; }
.app-flex-col { flex-direction: column; }
.app-flex-wrap { flex-wrap: wrap; }
.app-items-center { align-items: center; }
.app-items-start { align-items: flex-start; }
.app-justify-between { justify-content: space-between; }
.app-justify-center { justify-content: center; }
.app-justify-end { justify-content: flex-end; }
.app-flex-1 { flex: 1; }
.app-shrink-0 { flex-shrink: 0; }
.app-flex-shrink-0 { flex-shrink: 0; }
.app-gap-1 { gap: var(--app-space-1); }
.app-gap-2 { gap: var(--app-space-2); }
.app-gap-3 { gap: var(--app-space-3); }
.app-gap-4 { gap: var(--app-space-4); }
.app-gap-5 { gap: var(--app-space-5); }
.app-mt-1 { margin-top: var(--app-space-1); }
.app-mt-2 { margin-top: var(--app-space-2); }
.app-mt-3 { margin-top: var(--app-space-3); }
.app-mt-4 { margin-top: var(--app-space-4); }
.app-mt-5 { margin-top: var(--app-space-5); }
.app-mt-6 { margin-top: var(--app-space-6); }
.app-mb-1 { margin-bottom: var(--app-space-1); }
.app-mb-2 { margin-bottom: var(--app-space-2); }
.app-mb-3 { margin-bottom: var(--app-space-3); }
.app-ml-1 { margin-left: var(--app-space-1); }
.app-ml-auto { margin-left: auto; }
.app-text-center { text-align: center; }
.app-text-xs { font-size: var(--app-text-xs); }
.app-text-sm { font-size: var(--app-text-sm); }
.app-text-lg { font-size: var(--app-text-lg); }
.app-font-bold { font-weight: 700; }
.app-font-black { font-weight: 800; }
.app-font-semibold { font-weight: 600; }
.app-text-muted { color: var(--app-text-muted); }
.app-text-secondary { color: var(--app-text-secondary); }
.app-text-danger { color: var(--app-danger); }
.app-font-mono { font-family: var(--app-font-mono); }
.app-text-primary { color: var(--app-primary); }
.app-leading-tight { line-height: 1.25; }
.app-min-w-0 { min-width: 0; }
.app-w-full { width: 100%; }
.app-select-none { user-select: none; }
.app-cursor-pointer { cursor: pointer; }

.app-link {
  color: var(--app-primary);
  cursor: pointer;
  transition: color var(--app-transition);
}
.app-link:hover { color: var(--app-primary-hover); }
.app-link:focus-visible { outline: 2px solid var(--app-primary); outline-offset: 2px; border-radius: 2px; }

.app-hover-bg:hover {
  background: var(--app-surface-hover);
}
.app-cursor-not-allowed { cursor: not-allowed; }
.app-overflow-hidden { overflow: hidden; }
.app-icon { width: 18px; height: 18px; }
.app-icon-sm { width: 16px; height: 16px; }
i.app-icon, i.app-icon-sm, i.bi.app-icon, i.bi.app-icon-sm {
  width: auto;
  height: auto;
  display: inline-block;
  font-style: normal;
  line-height: 1;
  vertical-align: -0.125em;
}
.app-overflow-y-auto { overflow-y: auto; }
.app-relative { position: relative; }
.app-absolute { position: absolute; }
.app-fixed { position: fixed; }
.app-inset-0 { inset: 0; }
.app-top-3 { top: var(--app-space-3); }
.app-left-3 { left: var(--app-space-3); }
.app-z-10 { z-index: 10; }
.app-z-50 { z-index: 50; }

.app-py-2 {
  padding-top: var(--app-space-2);
  padding-bottom: var(--app-space-2);
}

.app-py-6 {
  padding-top: var(--app-space-6);
  padding-bottom: var(--app-space-6);
}

.app-p-2 {
  padding: var(--app-space-2);
}

.app-p-8 {
  padding: var(--app-space-8);
}

.app-border-bottom {
  border-bottom: 1px solid var(--app-border-light);
}

.app-grid-cols-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.app-bg-surface-secondary {
  background: var(--app-surface-secondary);
}

.app-text-10 {
  font-size: 10px;
}

.app-items-end {
  align-items: flex-end;
}

.app-col-span-2 {
  grid-column: span 2;
}

.app-text-right {
  text-align: right;
}

.app-max-w-64 {
  max-width: 16rem;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* --- Dropdown Menu --- */
.app-dropdown {
  position: relative;
  display: inline-flex;
}

.app-dropdown__menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 50;
  min-width: 160px;
  margin-top: var(--app-space-1);
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  overflow: hidden;
  animation: app-fade-in 0.15s ease;
}

.app-dropdown__menu--right {
  left: auto;
  right: 0;
}

.app-dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  width: 100%;
  padding: var(--app-space-2) var(--app-space-4);
  border: none;
  background: transparent;
  color: var(--app-text-secondary);
  font-size: var(--app-text-xs);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--app-transition);
}

.app-dropdown__item:hover {
  background: var(--app-surface-secondary);
  color: var(--app-text);
}

.app-dropdown__item:active {
  background: var(--app-surface-hover);
}

/* --- Context Menu (右键菜单) --- */
.app-context-menu {
  position: fixed;
  z-index: 300;
  min-width: 176px;
  max-width: calc(100vw - 24px);
  padding: var(--app-space-1);
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  overflow: hidden;
}

.app-context-menu__item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  width: 100%;
  padding: var(--app-space-2) var(--app-space-3);
  border: none;
  border-radius: var(--app-radius-sm);
  background: transparent;
  color: var(--app-text-secondary);
  font-size: var(--app-text-xs);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--app-transition), color var(--app-transition);
}

.app-context-menu__item:hover {
  background: var(--app-surface-secondary);
  color: var(--app-text);
}

.app-context-menu__item--danger {
  color: var(--app-danger);
}

.app-context-menu__item--danger:hover {
  background: var(--app-danger-bg-subtle);
  color: var(--app-danger);
}

@media (max-width: 640px) {
  .app-context-menu__item {
    min-height: 44px;
  }
}

/* --- Animations --- */
@keyframes app-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes app-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes app-scale-in {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes app-spin {
  to { transform: rotate(360deg); }
}

@keyframes app-toast-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.app-animate-fade-in {
  animation: app-fade-in 0.2s ease;
}

.app-animate-pulse {
  animation: app-pulse 1.5s ease-in-out infinite;
}

.app-animate-scale-in {
  animation: app-scale-in 0.2s ease;
}

.app-animate-spin {
  animation: app-spin 0.8s linear infinite;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .app-shell {
    padding: var(--app-space-3);
    gap: var(--app-space-3);
  }

  .app-header__inner {
    padding: var(--app-space-3);
    gap: var(--app-space-2);
  }

  .app-file-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--app-space-3);
  }

  .app-upload-progress {
    left: var(--app-space-3);
    right: var(--app-space-3);
    bottom: var(--app-space-3);
    width: auto;
  }

  .app-dialog-overlay {
    padding: var(--app-space-3);
  }

  .app-auth__title {
    font-size: 24px;
  }

  .app-auth__inner {
    padding: var(--app-space-4);
  }

  /* ── 头部：紧凑按钮，侧栏切换按钮仅保留图标 ── */
  .app-header__actions {
    gap: var(--app-space-1);
  }
  .app-header__actions .app-btn {
    padding: var(--app-space-1) var(--app-space-2);
  }
  .app-header__actions .app-btn__label {
    display: none;
  }

  /* ── 工具栏：面包屑独占一行，排序/布局组右对齐 ── */
  .app-toolbar__left {
    flex: 1 1 100%;
  }
  .app-breadcrumb__item {
    max-width: 90px;
  }
  .app-breadcrumb__current {
    max-width: 120px;
  }

  /* ── 统一操作栏：按钮紧凑换行，不重叠 ── */
  .app-action-bar--inline {
    margin-top: var(--app-space-2);
    padding-top: var(--app-space-2);
    gap: var(--app-space-2);
  }
  .app-action-bar__group .app-btn {
    padding: var(--app-space-1) var(--app-space-2);
    font-size: var(--app-text-xs);
  }
  .app-select-all {
    padding: var(--app-space-1) var(--app-space-2);
  }
}

@media (max-width: 1023px) {
  .app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 50;
    width: 280px;
    max-width: 80vw;
    height: 100vh;
    height: 100dvh;
    background: var(--app-surface);
    border-right: 1px solid var(--app-border);
    padding: var(--app-space-5) var(--app-space-4);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
    display: flex !important;
    flex-direction: column;
    gap: var(--app-space-5);
  }
  .app-sidebar--open {
    transform: translateX(0);
  }

  .app-header__search {
    order: 10;
    flex-basis: 100%;
  }

  /* ── 中屏：列表行隐藏存储列，保持其余列对齐 ── */
  .app-card--list {
    grid-template-areas: "chk icon name size time actions";
    grid-template-columns: var(--app-list-cols--no-storage);
  }
  .app-card__storage {
    display: none;
  }
}

.app-sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 49;
  background: rgba(0, 0, 0, 0.35);
}
.app-sidebar-backdrop--visible {
  display: block;
}

/* --- Long transition safety for shell collapse --- */
#app-shell {
  transition: grid-template-columns var(--app-transition-slow) ease;
}

/* --- Skeleton loader container for #file-grid --- */
#file-grid {
  align-content: start;
}

/* --- Download Panel (replaces inline cssText in download-ui.js) --- */
.app-download-panel {
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  z-index: 50;
  width: min(92vw, 32rem);
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: var(--app-space-4);
  box-shadow: var(--app-shadow-float);
  animation: app-fade-in 0.2s ease;
}

.app-download-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--app-space-2);
  padding-bottom: var(--app-space-3);
  border-bottom: 1px solid var(--app-border-light);
  margin-bottom: var(--app-space-3);
}

.app-download-panel__title {
  font-size: var(--app-text-xs);
  font-weight: 800;
  color: var(--app-text);
}

.app-download-panel__list {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
}

.app-download-panel__item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: var(--app-space-2) var(--app-space-3);
  border-bottom: 1px solid var(--app-border-light);
  font-size: var(--app-text-xs);
}

.app-download-panel__item:last-child {
  border-bottom: none;
}

.app-download-panel__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--app-space-2);
  padding-top: var(--app-space-3);
  border-top: 1px solid var(--app-border-light);
  margin-top: var(--app-space-3);
}

/* Keep these for backward compat during migration */
.rounded-\[1\.75rem\] { border-radius: 1.75rem; }
.rounded-\[2rem\] { border-radius: 2rem; }
.shadow-xl { box-shadow: none; }
.shadow-2xl { box-shadow: none; }

/* Breadcrumb container within panel */
#breadcrumb-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

#breadcrumb-container > span,
#breadcrumb-container > button {
  flex: 0 0 auto;
}

/* Storage appearance icon hover */
.storage-appearance-icon svg {
  width: 100%;
  height: 100%;
}

.icon-option:hover {
  opacity: 0.8;
  transform: scale(1.05);
}

.color-option:hover {
  transform: scale(1.15);
}

/* =============================================================================
   Mobile UX Hardening
   Touch targets ≥ 40px, bottom-sheet dialogs, safe-area insets, sticky batch bar.
   ============================================================================= */
@media (max-width: 640px) {
  /* 防止 iOS 聚焦输入框时自动放大页面 */
  input, select, textarea {
    font-size: 16px !important;
  }

  button {
    touch-action: manipulation;
  }

  /* ── 头部：扩大图标按钮触达面积 ── */
  .app-header__actions .app-btn {
    min-width: 40px;
    min-height: 40px;
  }
  .app-header__actions .app-btn--ghost {
    min-width: auto;
  }

  /* ── 工具栏：排序/布局分组按钮加高 ── */
  .app-toolbar__group .app-btn {
    height: 38px;
  }
  .app-toolbar__right {
    gap: var(--app-space-1);
  }

  /* ── 文件卡片：操作按钮 ≥ 38px 触达区 ── */
  .app-card__actions .app-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
    padding: 0;
  }
  .app-card__actions .app-btn i {
    font-size: 17px !important;
  }
  .app-card__more-btn {
    width: 38px;
    height: 38px;
  }

  /* ── 复选框加大 ── */
  .app-checkbox {
    width: 20px;
    height: 20px;
  }
  .app-checkbox-pos {
    top: 12px;
    left: 12px;
  }

  /* ── 操作栏：按钮加高 ── */
  .app-select-all {
    min-height: 38px;
  }
  .app-action-bar__group .app-btn {
    min-height: 38px;
  }

  /* ── 下拉菜单：大号触达 + 防溢出视口 ── */
  .app-dropdown__menu {
    min-width: 200px;
    max-width: calc(100vw - 24px);
  }
  .app-dropdown__item {
    min-height: 44px;
    padding: var(--app-space-3) var(--app-space-4);
  }

  /* ── 面包屑：单行横向滚动，不再压扁文字 ── */
  #breadcrumb-container {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  #breadcrumb-container::-webkit-scrollbar {
    display: none;
  }

  /* ── 对话框 → 底部弹层（全宽 + 圆角顶边） ── */
  .app-dialog-overlay {
    padding: 0;
    align-items: flex-end;
  }
  .app-dialog,
  .app-dialog--sm, .app-dialog--md, .app-dialog--lg, .app-dialog--xl, .app-dialog--full {
    max-width: 100%;
    max-height: 92dvh;
    border-radius: var(--app-radius-lg) var(--app-radius-lg) 0 0;
  }

  /* ── 选中状态：批量操作栏吸底 ── */
  body.app-has-selection .app-action-bar--inline {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    margin: 0;
    padding: var(--app-space-3);
    padding-bottom: calc(var(--app-space-3) + env(safe-area-inset-bottom, 0px));
    background: var(--app-surface);
    border-top: 1px solid var(--app-border);
    border-radius: var(--app-radius-lg) var(--app-radius-lg) 0 0;
  }
  body.app-has-selection .app-action-bar__inner {
    flex-wrap: wrap;
  }
  body.app-has-selection .app-action-bar__main {
    flex-shrink: 0;
  }
  body.app-has-selection .app-action-bar__actions {
    flex: 1 1 100%;
    max-width: 100%;
    margin-left: 0;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  body.app-has-selection .app-action-bar__actions::-webkit-scrollbar {
    display: none;
  }
  body.app-has-selection .app-action-bar__group .app-btn {
    min-height: 44px;
    padding: var(--app-space-2) var(--app-space-3);
    flex-shrink: 0;
  }
  body.app-has-selection .app-main {
    padding-bottom: 112px;
  }

  /* ── 底部浮动面板：iPhone 底部安全区 ── */
  .app-upload-progress,
  .app-download-panel {
    padding-bottom: calc(var(--app-space-4) + env(safe-area-inset-bottom, 0px));
  }

  /* ── 手机端列表行：单行 flex 布局 [复选框|图标|文件名|大小|时间|操作]，
         大小与时间以紧凑文本贴右侧，文件名 flex:1 弹性占位保持完整可见可点击。
         文件夹行隐藏冗余的"文件夹"文字（图标已足以表达类型）。
         注意：必须放在 1023px 媒体查询之后，否则会被其 grid 列宽规则覆盖 ── */
  .app-card--list {
    display: flex;
    align-items: center;
    gap: var(--app-space-2);
    padding: var(--app-space-2) var(--app-space-3);
  }
  .app-card--list .app-card__checkbox,
  .app-card--list .app-card__icon,
  .app-card--list .app-card__actions {
    flex-shrink: 0;
  }
  .app-card--list .app-card__name {
    flex: 1 1 auto;
    min-width: 0;
  }
  .app-card--list .app-card__size,
  .app-card--list .app-card__time {
    flex-shrink: 0;
    font-size: 11px;
    text-align: right;
  }
  .app-card--list .app-card__size {
    display: block;
  }
  .app-card--list[data-type="folder"] .app-card__size {
    display: none;
  }
  .app-card--list .app-card__actions {
    gap: 2px;
  }
  .app-card--list .app-card__actions .app-btn {
    padding: var(--app-space-1);
  }
}

/* ── 定位高亮：搜索结果"定位到所在位置"跳转后闪烁提醒 ── */
@keyframes app-locate-flash {
  0%, 100% { box-shadow: 0 0 0 0 transparent; }
  50% { box-shadow: 0 0 0 3px var(--app-primary, #4f8cff); }
}
.app-locate-flash {
  animation: app-locate-flash 1.2s ease-in-out 3;
}

/* =============================================================================
   浏览效率改进（列表列头 / 详情面板 / 密度 / 搜索高亮 / 空状态）
   全部使用 app- 前缀与现有设计变量，追加在文件末尾避免回归。
   ============================================================================= */

/* --- 列表列头（桌面端列表视图，与卡片共用列变量） --- */
.app-list-head {
  display: grid;
  grid-template-columns: var(--app-list-cols);
  gap: var(--app-space-3);
  align-items: center;
  padding: var(--app-space-2) var(--app-space-3);
  font-size: 12px;
  font-weight: 700;
  color: var(--app-text-muted);
  border-bottom: 1px solid var(--app-border-light);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.app-list-head__btn {
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 6px;
  text-align: left;
}
.app-list-head__btn--num {
  text-align: right;
}
.app-list-head__btn:hover {
  color: var(--app-primary);
}

/* --- 搜索高亮 --- */
.app-card__name mark,
.app-card__name--grid mark {
  background: #fef08a;
  color: #854d0e;
  border-radius: 3px;
  padding: 0 1px;
}
.dark .app-card__name mark,
.dark .app-card__name--grid mark {
  background: #854d0e;
  color: #fef08a;
}

/* --- 详情面板（桌面端右下浮动，不改动 grid 布局；上移避让上传/下载浮层） --- */
.app-details {
  position: fixed;
  right: var(--app-space-5);
  bottom: calc(var(--app-space-5) + 180px);
  z-index: 45;
  width: min(92vw, 300px);
  max-height: min(60vh, 480px);
  overflow-y: auto;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: var(--app-space-4);
  box-shadow: var(--app-shadow-float);
}
.app-details__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--app-space-2);
}
.app-details__thumb {
  height: 96px;
  border-radius: var(--app-radius-lg);
  background: var(--app-surface-secondary);
  border: 1px solid var(--app-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  margin-bottom: var(--app-space-2);
}
.app-details__kv {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 4px 8px;
  font-size: 12px;
  margin: var(--app-space-2) 0 var(--app-space-3);
}
.app-details__kv dt {
  color: var(--app-text-muted);
}
.app-details__kv dd {
  margin: 0;
  word-break: break-all;
}

/* --- 紧凑密度 --- */
.app-main--compact .app-card--list {
  padding-top: 4px;
  padding-bottom: 4px;
}
.app-main--compact .app-file-grid {
  gap: var(--app-space-2);
}
.app-main--compact .app-card--grid {
  min-height: 0;
  padding: var(--app-space-2);
}
.app-main--compact .app-card__grid-icon {
  width: 52px;
  height: 52px;
}

/* --- 空状态操作区 --- */
.app-empty-state__actions {
  display: flex;
  gap: var(--app-space-2);
  flex-wrap: wrap;
  justify-content: center;
  margin-top: var(--app-space-2);
}

/* --- 移动端：详情变底部抽屉 --- */
@media (max-width: 640px) {
  .app-list-head {
    display: none;
  }
  .app-details {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-height: 62dvh;
    border-radius: var(--app-radius-lg) var(--app-radius-lg) 0 0;
    padding-bottom: calc(var(--app-space-4) + env(safe-area-inset-bottom, 0px));
  }
}
@media (min-width: 641px) and (max-width: 1023px) {
  .app-list-head {
    grid-template-columns: var(--app-list-cols--no-storage);
  }
  .app-card--list {
    grid-template-areas: "chk icon name size time actions";
    grid-template-columns: var(--app-list-cols--no-storage);
  }
}

/* 后台账户表：首列冻结，移动端横滑仍可操作 */
.app-table-wrap .app-table th:first-child,
.app-table-wrap .app-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--app-surface);
  z-index: 1;
}

/* --- 预览浮层（图片灯箱 / 音视频 / PDF / 文本共用） --- */
.app-preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--app-space-4);
  background: rgba(15, 23, 42, 0.6);
}
.app-preview {
  width: min(94vw, 960px);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  box-shadow: var(--app-shadow-float);
  overflow: hidden;
}
.app-preview__header {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: var(--app-space-3) var(--app-space-4);
  border-bottom: 1px solid var(--app-border-light);
  min-width: 0;
}
.app-preview__title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--app-text-sm);
  font-weight: 800;
}
.app-preview__body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--app-surface-secondary);
  padding: var(--app-space-4);
}
.app-preview__body img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--app-radius);
}
.app-preview__body video,
.app-preview__body audio {
  width: 100%;
  max-height: 70vh;
  outline: none;
}
.app-preview__body iframe {
  width: 100%;
  height: 70vh;
  border: none;
  border-radius: var(--app-radius);
  background: var(--app-surface);
}
.app-preview__body textarea {
  width: 100%;
  min-height: 50vh;
  resize: vertical;
}

/* 搜索过滤条：类型 / 时间 / 大小 / 收藏，与工具栏同高 */
.app-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--app-space-2);
  padding-top: var(--app-space-3);
  margin-top: var(--app-space-3);
  border-top: 1px solid var(--app-border-light);
}
.app-filter-bar .app-select {
  width: auto;
  min-width: 110px;
}

/* 收藏星标：列表与网格共用 */
.app-fav-btn {
  color: var(--app-text-muted);
}
.app-fav-btn.is-fav {
  color: var(--app-warning-hover);
}

/* 翻页条：计数 + 页码按钮组 + 每页条数 */
.app-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--app-space-3) var(--app-space-4);
  padding: var(--app-space-4) var(--app-space-2);
}
.app-pagination.app-hidden {
  display: none;
}
.app-pagination__info {
  font-size: var(--app-text-xs);
  font-weight: 700;
  color: var(--app-text-muted);
  white-space: nowrap;
}
.app-pagination__pages {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--app-space-1);
}
.app-pagination__pages .app-btn {
  min-width: 32px;
}
.app-pagination__size {
  display: inline-flex;
  align-items: center;
  gap: var(--app-space-1);
  font-size: var(--app-text-xs);
  font-weight: 700;
  color: var(--app-text-muted);
  white-space: nowrap;
}
.app-pagination__size .app-select {
  width: auto;
  padding: var(--app-space-1) var(--app-space-2);
  font-size: var(--app-text-xs);
}

/* =============================================================================
   公开分享页（standalone，与主站共用同一套设计变量与组件语言）
   作用域限定在 .app-share 之下，避免污染主应用；只引用 var(--app-*)。
   ============================================================================= */

/* --- 分享页根：字体 / 背景 / 前景与主站一致 --- */
.app-share {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--app-bg);
  color: var(--app-text);
  font-family: var(--app-font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- 分享页顶栏：与主站 .app-header 同语言（sticky + 底边线） --- */
.app-share .app-share-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--app-surface);
  border-bottom: 1px solid var(--app-border);
}
.app-share .app-share-topbar__inner {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  max-width: 896px;
  margin: 0 auto;
  padding: var(--app-space-3) var(--app-space-4);
}
.app-share .app-share-topbar__inner--narrow {
  max-width: 480px;
}
.app-share .app-share-brand {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  min-width: 0;
}
.app-share .app-share-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: var(--app-radius);
  background: var(--app-primary);
  color: var(--app-primary-text);
}
.app-share .app-share-logo svg {
  width: 20px;
  height: 15px;
}
.app-share .app-share-brand__title {
  font-size: var(--app-text-base);
  font-weight: 800;
  color: var(--app-text);
  white-space: nowrap;
}
.app-share .app-share-topbar__spacer {
  flex: 1;
  min-width: 0;
}

/* --- 居中型分享页（文件 / 密码）：与登录页同款 radial 背景 --- */
.app-share--center {
  background:
    radial-gradient(640px 340px at 15% -5%, rgba(6,182,212,0.07), transparent 70%),
    radial-gradient(560px 320px at 95% 105%, rgba(59,130,246,0.06), transparent 70%);
}
.app-share .app-share-wrap {
  max-width: 896px;
  margin: 0 auto;
  padding: var(--app-space-5) var(--app-space-4);
}
.app-share .app-share-wrap--narrow {
  max-width: 440px;
  padding: var(--app-space-4);
}
.app-share .app-share-card {
  box-shadow: var(--app-shadow-float);
  text-align: center;
}

/* --- 分享页图标底纹：与文件网格卡片同款 --- */
.app-share .app-share-icontile {
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 22px;
  margin: 4px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--app-surface-secondary), var(--app-surface-hover));
  border: 1px solid var(--app-border-light);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.app-share .app-share-icontile--round {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--app-primary-bg-subtle);
  box-shadow: none;
}
.app-share .app-share-title {
  margin-top: var(--app-space-4);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--app-text);
  word-break: break-all;
}
.app-share .app-share-meta {
  margin-top: var(--app-space-2);
  font-size: 13px;
  color: var(--app-text-secondary);
}
.app-share .app-share-meta__ext {
  color: var(--app-primary);
  font-weight: 700;
}
.app-share .app-share-actions {
  margin-top: var(--app-space-5);
  display: flex;
  flex-direction: column;
  gap: var(--app-space-3);
}
.app-share .app-share-actions .app-btn {
  min-height: 44px;
  font-size: var(--app-text-base);
  font-weight: 700;
  width: 100%;
}
.app-share .app-share-footer {
  margin-top: var(--app-space-5);
  padding-top: var(--app-space-4);
  border-top: 1px solid var(--app-border-light);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--app-space-3);
  text-align: left;
}
.app-share .app-share-footer__label {
  font-size: 11px;
  font-weight: 800;
  color: var(--app-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
:lang(zh) .app-share .app-share-footer__label {
  text-transform: none;
  letter-spacing: 0;
}
.app-share .app-share-footer__value {
  margin-top: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--app-text);
}
.app-share .app-share-footer__value--mono {
  font-family: var(--app-font-mono);
  font-size: 12px;
  color: var(--app-text-muted);
}
.app-share .app-share-hint {
  margin-top: var(--app-space-2);
  font-size: 13px;
  color: var(--app-text-muted);
}
.app-share .app-share-field {
  margin-top: var(--app-space-4);
}
.app-share .app-share-field .app-input {
  height: 44px;
  text-align: left;
}
.app-share .app-share-error {
  display: none;
  margin-top: var(--app-space-2);
  font-size: 13px;
  font-weight: 600;
  color: var(--app-danger);
  text-align: center;
}

/* --- 文件夹分享：头部 / 面包屑 / 工具栏 --- */
.app-share .app-share-head {
  display: flex;
  align-items: center;
  gap: var(--app-space-3);
  min-width: 0;
}
.app-share .app-share-head__icon {
  display: inline-flex;
  flex-shrink: 0;
  color: var(--app-primary);
}
.app-share .app-share-head__title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--app-space-2);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--app-text);
  min-width: 0;
  overflow-wrap: anywhere;
}
.app-share .app-share-head__meta {
  font-size: 13px;
  color: var(--app-text-secondary);
  margin-top: 2px;
}
.app-share .app-share-crumb {
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
  padding-bottom: var(--app-space-2);
  margin-bottom: var(--app-space-4);
  font-size: var(--app-text-sm);
}
.app-share .app-share-toolbar {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  flex-wrap: wrap;
  margin-bottom: var(--app-space-4);
}
.app-share .app-share-status {
  font-size: 13px;
  color: var(--app-text-muted);
  margin-left: auto;
}
.app-share .app-share-selinfo {
  display: none;
  font-size: 12px;
  color: var(--app-text-muted);
}

/* --- 文件夹分享：文件列表（行 hover / 圆角按钮与主站列表同语言） --- */
.app-share .app-share-list {
  overflow: hidden;
}
.app-share .app-share-list__head {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--app-border);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--app-text-muted);
}
:lang(zh) .app-share .app-share-list__head {
  text-transform: none;
  letter-spacing: 0;
}
.app-share .erow {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  transition: background var(--app-transition);
}
.app-share .erow:hover {
  background: var(--app-surface-hover);
}
.app-share .app-share-row__check {
  width: 36px;
  flex-shrink: 0;
}
.app-share .app-share-row__check input[type='checkbox'],
.app-share .app-share-list__head input[type='checkbox'] {
  width: 16px;
  height: 16px;
  accent-color: var(--app-primary);
  cursor: pointer;
}
.app-share .app-share-row__main {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.app-share .app-share-row__name {
  font-size: 14px;
  font-weight: 500;
  color: var(--app-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.app-share .app-share-row__name--folder {
  font-weight: 600;
}
.app-share .app-share-row__size {
  width: 88px;
  flex-shrink: 0;
  text-align: right;
  font-size: 13px;
  color: var(--app-text-secondary);
}
.app-share .app-share-row__type {
  width: 72px;
  flex-shrink: 0;
  text-align: right;
  font-size: 12px;
  color: var(--app-text-muted);
}
.app-share .app-share-row__ops {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2px;
  white-space: nowrap;
}
.app-share .row-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: none;
  color: var(--app-text-secondary);
  border-radius: var(--app-radius);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--app-transition), color var(--app-transition);
}
.app-share .row-btn:hover {
  background: var(--app-surface-secondary);
  color: var(--app-primary);
}

/* --- 分享页旧工具类：统一收敛到主站变量（仅 .app-share 内生效） --- */
.app-share .hidden {
  display: none !important;
}
.app-share .fade-in {
  animation: app-fade-in 0.2s ease-out both;
}
.app-share .icon-spin {
  display: inline-block;
  animation: app-spin 1s linear infinite;
  vertical-align: middle;
}
.app-share .sbar {
  scrollbar-width: thin;
  scrollbar-color: var(--app-border) transparent;
}
.app-share .sbar::-webkit-scrollbar {
  width: 4px;
}
.app-share .sbar::-webkit-scrollbar-thumb {
  background: var(--app-border);
  border-radius: 2px;
}
.app-share .bghover {
  transition: opacity var(--app-transition), background var(--app-transition);
  cursor: pointer;
}
.app-share .bghover:hover {
  opacity: 0.88;
}
.app-share .bghover:active {
  opacity: 0.82;
}
@media (max-width: 640px) {
  .app-share .hm {
    display: none !important;
  }
}

/* --- 分享页浮动面板（下载 / 上传）：与主站浮层同语言 --- */
.app-share .dlp,
.app-share .upf {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 50;
  width: min(94vw, 440px);
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius-lg);
  padding: var(--app-space-4);
  box-shadow: var(--app-shadow-float);
}
.app-share .upf-hidden {
  display: none !important;
}
.app-share .dlp-bar,
.app-share .upf-bar {
  height: 6px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--app-surface-secondary);
  margin-top: var(--app-space-3);
}
.app-share .dlp-bar-inner,
.app-share .upf-bar-inner {
  height: 100%;
  border-radius: 999px;
  background: var(--app-primary);
  transition: width 0.3s ease;
  width: 0%;
}
.app-share .dlp-meta,
.app-share .upf-meta {
  font-size: 11px;
  color: var(--app-text-muted);
  margin-top: 5px;
}
.app-share .upf-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--app-text);
}
.app-share .dlp-item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: 7px 0;
  font-size: 12px;
  border-bottom: 1px solid var(--app-border-light);
}
.app-share .dlp-item:last-child {
  border-bottom: none;
}
.app-share .dlp-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  font-weight: 500;
  color: var(--app-text);
}
.app-share .dlp-item-status {
  width: 64px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--app-text-muted);
  flex-shrink: 0;
  font-size: 11px;
}
.app-share .dlp-item-bar {
  height: 4px;
  border-radius: 2px;
  overflow: hidden;
  background: var(--app-surface-secondary);
  margin-top: 4px;
}
.app-share .dlp-item-bar-inner {
  height: 100%;
  border-radius: 2px;
  width: 0%;
  transition: width 0.3s ease;
}
.app-share .dlp-item-bar-inner.active {
  background: repeating-linear-gradient(45deg, var(--app-primary) 0, var(--app-primary) 6px, var(--app-surface-secondary) 6px, var(--app-surface-secondary) 12px);
  background-size: 1rem 100%;
  animation: app-share-dlp-stripe 0.8s linear infinite;
}
.app-share .dlp-item-bar-inner.ok {
  background: var(--app-success);
}
.app-share .dlp-item-bar-inner.err {
  background: var(--app-danger);
}
.app-share .dlp-row-status {
  flex-shrink: 0;
  width: 22px;
  text-align: center;
}
.app-share .dlp-retry {
  display: none;
  border: 1px solid var(--app-border);
  background: none;
  color: var(--app-text-secondary);
  border-radius: var(--app-radius-sm);
  padding: 1px 8px;
  font-size: 11px;
  cursor: pointer;
  flex-shrink: 0;
}
.app-share .dlp-retry:hover {
  color: var(--app-primary);
  border-color: var(--app-primary);
}
.app-share .dlp-close {
  cursor: pointer;
  border: none;
  background: none;
  color: var(--app-text-muted);
  font-size: 15px;
  line-height: 1;
  padding: 2px 4px;
}
.app-share .dlp-close:hover {
  color: var(--app-text);
}
@keyframes app-share-dlp-stripe {
  from { background-position: 0 0; }
  to { background-position: 1rem 0; }
}
.app-share .upf-item {
  display: flex;
  align-items: center;
  gap: var(--app-space-2);
  padding: 4px 0;
  font-size: 12px;
  color: var(--app-text);
}
.app-share .upf-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}
.app-share .upf-item-progress {
  width: 60px;
  flex-shrink: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--app-text-muted);
}
.app-share .app-share-dropzone {
  border: 1px dashed var(--app-border);
  background: var(--app-surface);
  padding: var(--app-space-5);
  border-radius: var(--app-radius-lg);
  text-align: center;
  cursor: pointer;
}
.app-share .app-share-empty,
.app-share .app-share-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--app-space-2);
  padding: 48px 0;
  color: var(--app-text-muted);
  font-size: 14px;
}

/* --- 分享页移动端：按钮触达面积与主站对齐 --- */
@media (max-width: 640px) {
  .app-share .app-share-wrap {
    padding: var(--app-space-3);
  }
  .app-share .app-share-toolbar .app-btn {
    min-height: 38px;
  }
  .app-share .row-btn {
    width: 38px;
    height: 38px;
  }
  .app-share .dlp,
  .app-share .upf {
    left: var(--app-space-3);
    right: var(--app-space-3);
    bottom: var(--app-space-3);
    width: auto;
    padding-bottom: calc(var(--app-space-4) + env(safe-area-inset-bottom, 0px));
  }
  .app-share input[type='checkbox'] {
    width: 20px;
    height: 20px;
  }
}