:root {
  --bg: #f5f5f5;
  --fg: #222;
  --accent: #4a90d9;
  --border: #ddd;
  --card-bg: #fff;
  --card-hover: #f0f0f0;
  --input-bg: #fff;
  --muted: #999;
}

[data-dark="1"] {
  --bg: #111;
  --fg: #ddd;
  --accent: #6db3f2;
  --border: #333;
  --card-bg: #1a1a2e;
  --card-hover: #222;
  --input-bg: #222;
  --muted: #666;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-dark="0"]) {
    --bg: #111;
    --fg: #ddd;
    --accent: #6db3f2;
    --border: #333;
    --card-bg: #1a1a2e;
    --card-hover: #222;
    --input-bg: #222;
    --muted: #666;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  padding-bottom: 60px;
  transition: background 0.3s, color 0.3s;
}

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
  background: var(--card-bg); position: sticky; top: 0; z-index: 10;
  flex-wrap: wrap; gap: 8px;
  transition: background 0.3s;
}

header h1 { font-size: 20px; font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

.search-input {
  padding: 6px 12px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--input-bg); color: var(--fg); font-size: 13px;
  width: 120px; outline: none; transition: border-color 0.2s, width 0.2s, background 0.3s;
}
.search-input:focus { border-color: var(--accent); width: 160px; }
.search-input::placeholder { color: var(--muted); }

.stats-compact {
  font-size: 12px; color: var(--accent); white-space: nowrap;
  font-weight: 600; padding: 2px 8px;
  background: rgba(74,144,217,0.08); border-radius: 12px;
}

.icon-btn {
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--bg); color: var(--fg); font-size: 16px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; padding: 0;
  transition: background 0.15s, border-color 0.15s;
}
.icon-btn:hover { background: var(--card-hover); border-color: var(--accent); }

/* ── 拖拽上传 ── */
.drop-zone {
  position: fixed; inset: 0; z-index: 90;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 600; color: white;
  background: rgba(74, 144, 217, 0.85);
  pointer-events: none;
}

/* ── 分类栏 ── */
.category-bar {
  display: flex; gap: 6px; padding: 8px 16px;
  overflow-x: auto; white-space: nowrap;
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  -webkit-overflow-scrolling: touch;
  position: sticky; top: 55px; z-index: 9;
  transition: background 0.3s;
}
.cat-chip, .cat-add {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 14px; border-radius: 20px;
  font-size: 13px; cursor: pointer;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--border);
  transition: all 0.15s;
  user-select: none; flex-shrink: 0;
}
.cat-active { background: var(--accent); color: #fff; border-color: var(--accent); }
.cat-add { font-size: 18px; padding: 4px 12px; font-weight: 700; }
.cat-with-move { padding-left: 4px; }
.cat-move-group { display: inline-flex; flex-direction: column; align-items: center; margin-right: 2px; line-height: 1; }
.cat-move { display: inline-flex; align-items: center; justify-content: center; width: 12px; height: 8px; font-size: 8px; line-height: 1; cursor: pointer; opacity: 0.5; user-select: none; }
.cat-move:hover { opacity: 1; }
.cat-move-disabled { opacity: 0.15 !important; cursor: default; pointer-events: none; }
.cat-del { display: inline-flex; align-items: center; justify-content: center; margin-left: 4px; width: 16px; height: 16px; border-radius: 50%; font-size: 10px; line-height: 1; cursor: pointer; opacity: 0.5; }
.cat-del:hover { opacity: 1; background: rgba(0,0,0,0.1); }
.cat-active .cat-del:hover { background: rgba(255,255,255,0.2); }
.cat-count { font-size: 10px; opacity: 0.6; margin-left: 2px; }
.cat-count-recycle { font-size: 10px; }

/* ── 排序栏 ── */
.sort-bar {
  display: flex; align-items: center; gap: 4px;
  padding: 6px 16px; overflow-x: auto; white-space: nowrap;
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  position: sticky; top: 95px; z-index: 8;
  -webkit-overflow-scrolling: touch;
  transition: background 0.3s;
}
.sort-label { font-size: 12px; color: var(--muted); margin-right: 4px; flex-shrink: 0; }
.sort-option { display: inline-flex; padding: 3px 10px; border-radius: 12px; font-size: 12px; cursor: pointer; user-select: none; color: var(--fg); border: 1px solid var(--border); background: var(--bg); flex-shrink: 0; }
.sort-option:hover { border-color: var(--accent); }
.sort-active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── 批量操作栏 ── */
.batch-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; background: var(--card-bg);
  border-top: 1px solid var(--border); z-index: 20;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.1);
}
.batch-bar #selectedCount { flex: 1; font-size: 14px; font-weight: 600; }
.batch-bar button { padding: 8px 16px; border-radius: 6px; border: none; font-size: 13px; cursor: pointer; }
#batchDeleteBtn { background: #e74c3c; color: white; }
#batchDownloadBtn { background: #27ae60; color: white; }
#batchMoveBtn { background: var(--accent); color: white; }
#batchCancelBtn { background: var(--bg); color: var(--fg); }
.batch-restore-btn { background: #27ae60; color: white; }
.batch-permdelete-btn { background: #e74c3c; color: white; }

/* ── 选择模式 ── */
.thumb-cb { position: absolute; top: 8px; left: 8px; z-index: 3; width: 22px; height: 22px; cursor: pointer; accent-color: var(--accent); display: none; }
.select-mode .thumb-cb { display: block; }
.thumb-check-overlay { position: absolute; inset: 0; z-index: 2; border-radius: 4px; pointer-events: none; }
.thumb-check-overlay.checked { background: rgba(74, 144, 217, 0.15); border: 2px solid var(--accent); }
.select-all-bar { text-align: center; padding: 10px; font-size: 13px; color: var(--accent); cursor: pointer; border: 1px dashed var(--border); border-radius: 4px; margin-bottom: 12px; }
.select-all-bar:hover { background: var(--card-bg); }

/* ── 瀑布流/网格布局 ── */
.grid { padding: 12px; }
.grid.masonry { column-count: 4; column-gap: 12px; }
.grid.grid-mode { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }

.thumb-wrap { break-inside: avoid; margin-bottom: 12px; position: relative; display: block; width: 100%; overflow: hidden; border-radius: 4px; background: var(--card-bg); }
.grid.grid-mode .thumb-wrap { margin-bottom: 0; }

.thumb { position: absolute; top: 0; left: 0; width: 100%; height: 100%; display: block; border-radius: 4px; cursor: pointer; transition: transform 0.15s, box-shadow 0.15s; object-fit: cover; }
.grid.grid-mode .thumb { aspect-ratio: auto; object-fit: cover; position: static; height: auto; }
.thumb:hover { transform: scale(1.02); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }

.month-header { column-span: all; font-size: 14px; font-weight: 600; color: #888; padding: 16px 0 4px; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
.grid.grid-mode .month-header { grid-column: 1/-1; }

.load-more-bar { column-span: all; text-align: center; padding: 16px; font-size: 14px; color: var(--accent); cursor: pointer; }
.load-more-bar:hover { opacity: 0.7; }

/* ── 回收站（表格样式） ── */
.recycle-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  table-layout: fixed;
}
.recycle-table thead { position: sticky; top: 0; z-index: 2; }
.recycle-table th {
  background: var(--card-bg);
  font-size: 12px; font-weight: 600; color: var(--muted);
  padding: 10px 6px;
  text-align: left;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.recycle-table td {
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.recycle-table tbody tr:hover { background: var(--card-hover); }
.rc-thumb { width: 44px; text-align: center; }
.rc-thumb-img { width: 36px; height: 36px; object-fit: cover; border-radius: 4px; display: block; margin: 0 auto; cursor: pointer; }
.rc-cb { width: 36px; text-align: center; }
.rc-cb input { transform: scale(1.1); cursor: pointer; }
.rc-selected { background: var(--accent-bg, rgba(59,130,246,0.08)); }
.rc-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 500; }
.rc-type { width: 70px; font-size: 12px; color: var(--muted); }
.rc-size { width: 70px; font-size: 12px; color: var(--muted); }
.rc-date { width: 100px; font-size: 12px; color: var(--muted); }
.rc-left { width: 70px; font-size: 11px; color: #e67e22; }
.rc-actions { width: 70px; text-align: right; white-space: nowrap; }
.rc-restore, .rc-delete {
  display: inline-block; width: 28px; height: 28px; border-radius: 4px; border: none;
  font-size: 14px; cursor: pointer; line-height: 28px;
  text-align: center; padding: 0; transition: opacity 0.15s; margin-left: 3px;
}
.rc-restore { background: #27ae60; color: white; }
.rc-delete { background: #e74c3c; color: white; }
.rc-restore:hover, .rc-delete:hover { opacity: 0.85; }
.grid.recycle-mode { column-count: 1 !important; display: block; }
.recycle-empty-bar { text-align: center; padding: 20px; font-size: 14px; color: #e74c3c; cursor: pointer; font-weight: 500; }
.recycle-empty-bar:hover { opacity: 0.7; }

/* ── 灯箱 ── */
.lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,0.92); display: flex; align-items: center; justify-content: center; cursor: default; }
.lb-img-wrap { position: relative; display: flex; align-items: center; justify-content: center; overflow: hidden; width: 100%; height: 100%; }
.lb-img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: 4px; transition: transform 0.05s ease; cursor: grab; user-select: none; }
.lb-img:active { cursor: grabbing; }
.zoom-hint { color: rgba(255,255,255,0.35); font-size: 11px; margin-left: 12px; white-space: nowrap; }
.lb-nav { position: absolute; top: 0; bottom: 70px; width: 15%; min-width: 60px; background: transparent; color: rgba(255,255,255,0.5); border: none; font-size: 48px; cursor: pointer; z-index: 101; display: flex; align-items: center; justify-content: center; padding: 0; }
.lb-nav:hover { background: rgba(255,255,255,0.08); color: #fff; }
.lb-prev { left: 0; }
.lb-next { right: 0; }
.lb-bar { position: absolute; bottom: 0; left: 0; right: 0; height: 64px; background: linear-gradient(transparent, rgba(0,0,0,0.85)); display: flex; align-items: center; padding: 0 16px; gap: 10px; z-index: 101; }
.lb-bar-left, .lb-bar-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.lb-bar-center { flex: 1; display: flex; align-items: center; gap: 8px; justify-content: center; min-width: 0; }
.lb-info-btn, .lb-delete, .lb-download, .lb-original-btn { background: rgba(255,255,255,0.12); color: white; border: none; border-radius: 50%; width: 36px; height: 36px; font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center; padding: 0; }
.lb-info-btn:hover, .lb-delete:hover, .lb-download:hover, .lb-original-btn:hover { background: rgba(255,255,255,0.25); }
.lb-delete { background: rgba(231,76,60,0.7); }
.lb-download { background: rgba(74,144,217,0.7); }
.lb-original-btn { background: rgba(255,255,255,0.08); font-size: 12px; border-radius: 6px; width: auto; padding: 0 10px; }
#lbCounter { color: rgba(255,255,255,0.7); font-size: 13px; white-space: nowrap; }
.lb-filename { background: rgba(255,255,255,0.08); color: #fff; border: 1px solid rgba(255,255,255,0.15); border-radius: 4px; padding: 4px 8px; font-size: 13px; max-width: 180px; }
.lb-filename:focus { background: rgba(255,255,255,0.15); outline: none; border-color: var(--accent); }
#lbDate { color: rgba(255,255,255,0.5); font-size: 12px; white-space: nowrap; }
.lb-close { position: absolute; top: 12px; right: 16px; background: rgba(0,0,0,0.4); color: white; border: none; border-radius: 50%; width: 40px; height: 40px; font-size: 20px; cursor: pointer; z-index: 102; display: flex; align-items: center; justify-content: center; padding: 0; }
.lb-close:hover { background: rgba(255,255,255,0.15); }

/* ── 信息面板 ── */
.info-panel { position: fixed; top: 0; bottom: 0; right: 0; width: 320px; max-width: 85vw; background: rgba(20,20,30,0.93); backdrop-filter: blur(12px); color: #eee; z-index: 110; display: flex; flex-direction: column; box-shadow: -4px 0 24px rgba(0,0,0,0.3); animation: slideIn 0.2s ease; }
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
.info-panel-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); font-size: 15px; font-weight: 600; }
.info-panel-close { background: transparent; color: rgba(255,255,255,0.5); border: none; font-size: 20px; padding: 4px 10px; cursor: pointer; border-radius: 4px; }
.info-panel-close:hover { background: rgba(255,255,255,0.1); color: #fff; }
.info-panel-body { padding: 16px 20px; overflow-y: auto; flex: 1; font-size: 13px; }
.info-row { display: flex; flex-direction: column; gap: 2px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
.info-label { color: rgba(255,255,255,0.35); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.info-value { color: #eee; font-size: 14px; line-height: 1.4; }

/* ── 移动弹窗 ── */
.modal-overlay { position: fixed; inset: 0; z-index: 200; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; }
.modal-box { background: var(--card-bg); border-radius: 12px; padding: 20px; width: 320px; max-width: 85vw; box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.modal-title { font-size: 16px; font-weight: 600; margin-bottom: 12px; }
.modal-list { max-height: 300px; overflow-y: auto; margin-bottom: 12px; }
.move-cat-item { padding: 10px 12px; border-radius: 6px; cursor: pointer; font-size: 14px; }
.move-cat-item:hover { background: var(--accent); color: white; }
.modal-close-btn { width: 100%; padding: 10px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--fg); font-size: 14px; cursor: pointer; }

/* ── 通用 ── */
button { cursor: pointer; border-radius: 6px; border: none; font-size: 13px; transition: opacity 0.15s; }
button:hover { opacity: 0.85; }
#uploadBtn { padding: 8px 16px; background: var(--accent); color: white; }
#selectBtn { padding: 8px 12px; background: var(--bg); color: var(--fg); border: 1px solid var(--border); }

.upload-progress { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); background: var(--card-bg); padding: 8px 16px; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,0.15); z-index: 50; display: flex; align-items: center; gap: 8px; font-size: 13px; }
.progress-bar { width: 200px; height: 4px; background: #eee; border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); transition: width 0.3s ease; }

/* ── 登录页 ── */
.login-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg, #f5f5f5);
  display: flex; align-items: center; justify-content: center;
}
.login-box {
  background: var(--card-bg, #fff);
  padding: 40px; border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
  text-align: center; width: 300px;
}
.login-title { font-size: 24px; font-weight: 700; margin-bottom: 24px; }
.login-input {
  width: 100%; padding: 10px 14px; font-size: 16px; box-sizing: border-box;
  border: 1px solid var(--border, #ddd); border-radius: 6px;
  background: var(--input-bg, #fff);
  color: var(--text, #333); outline: none;
}
.login-input:focus { border-color: #3b82f6; }
.login-error { color: #e74c3c; font-size: 13px; margin: 8px 0; }
.login-btn {
  margin-top: 16px; width: 100%; padding: 10px;
  background: #3b82f6; color: white; border: none; border-radius: 6px;
  font-size: 16px; cursor: pointer; font-weight: 600;
}
.login-btn:hover { background: #2563eb; }

@media (max-width: 600px) {
  .grid.masonry { column-count: 2; column-gap: 8px; padding: 8px; }
  .grid.grid-mode { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; padding: 8px; }
  .thumb-wrap { margin-bottom: 8px; }
  .lb-nav { width: 20%; font-size: 36px; }
  .lb-img { max-width: 100vw; max-height: 70vh; }
  .lb-bar { height: 56px; padding: 0 12px; gap: 6px; }
  .lb-filename { max-width: 100px; }
  .info-panel { width: 100vw; max-width: 100vw; }
  .category-bar { top: 50px; }
  .sort-bar { top: 88px; }
  .recycle-table { font-size: 11px; }
  .recycle-table th, .recycle-table td { padding: 6px 4px; }
  .rc-thumb { width: 32px; }
  .rc-thumb-img { width: 28px; height: 28px; }
  .rc-type { width: 50px; }
  .rc-size { width: 50px; }
  .rc-date { width: 75px; }
  .rc-left { width: 55px; }
  .rc-actions { width: 56px; }
  .rc-restore, .rc-delete { width: 24px; height: 24px; line-height: 24px; font-size: 12px; }
}

@media (max-width: 1024px) {
  .grid.masonry { column-count: 3; }
}

/* ── 右侧滚动进度条 ── */
.scroll-progress {
  position: fixed; right: 0; top: 0; height: 100vh; width: 24px;
  z-index: 50; display: flex; flex-direction: column; align-items: center;
  pointer-events: none;
}
.sp-track {
  flex: 1; width: 4px; background: rgba(128,128,128,0.15);
  border-radius: 2px; margin: 60px 0 8px; position: relative;
  cursor: pointer; pointer-events: auto; transition: background 0.2s;
}
.sp-track:hover { background: rgba(128,128,128,0.25); }
.sp-thumb {
  position: absolute; top: 0; left: 0; width: 4px; height: 0%;
  background: var(--accent); border-radius: 2px; transition: height 0.1s ease;
}
.sp-dots {
  position: absolute; top: 60px; left: 0; right: 0; bottom: 44px;
  pointer-events: none;
}
.sp-dot {
  position: absolute; left: 50%; width: 6px; height: 6px;
  margin-left: -3px; margin-top: -3px;
  border-radius: 50%; background: var(--border);
  cursor: pointer; pointer-events: auto; transition: all 0.2s;
}
.sp-dot:hover { background: var(--accent); transform: scale(1.5); }
.sp-dot-active { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.sp-top {
  width: 20px; height: 20px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--card-bg); color: var(--fg); font-size: 13px;
  cursor: pointer; pointer-events: auto; display: flex;
  align-items: center; justify-content: center; padding: 0;
  margin-bottom: 12px; transition: all 0.2s; opacity: 0.5;
  line-height: 1;
}
.sp-top:hover { opacity: 1; background: var(--accent); color: #fff; border-color: var(--accent); }

@media (max-width: 600px) {
  .scroll-progress { width: 16px; }
  .sp-track { width: 3px; margin: 50px 0 6px; }
  .sp-thumb { width: 3px; }
  .sp-top { width: 16px; height: 16px; font-size: 11px; margin-bottom: 8px; }
}