.shell {
  position: relative;
  z-index: 1;
  width: min(1240px, 100%);
  height: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 14px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 18px 22px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(255, 254, 250, 0.96), rgba(255, 254, 250, 0.7)),
    linear-gradient(135deg, rgba(36, 114, 95, 0.1), rgba(184, 106, 60, 0.08));
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0;
  max-width: 720px;
  color: var(--surface-ink);
  font-family: "Noto Serif SC", "Noto Sans SC", serif;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.22;
  letter-spacing: 0;
}

.page {
  display: none;
  gap: 14px;
  min-height: 0;
  opacity: 0;
  transform: translateY(6px);
}

.page.page-active {
  display: grid;
  overflow: hidden;
  animation: pageSlideIn 220ms var(--ease-out) forwards;
}

@keyframes pageSlideIn {
  to { opacity: 1; transform: translateY(0); }
}

#pageHome.page-active { grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); grid-template-rows: minmax(0, 1fr); }
#pageMistakes.page-active { grid-template-columns: auto minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); gap: 0; }
#pageReview.page-active,
#pageStats.page-active { overflow: hidden; }
#pageSettings.page-active { overflow-y: auto; }

.study-command {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-muted);
}

.study-command strong {
  display: block;
  color: var(--surface-ink);
  font-size: 1rem;
}

.upload-card {
  display: grid;
  grid-template-columns: 1.1fr 0.8fr;
  gap: 12px;
  align-items: stretch;
  border-radius: var(--radius-xl);
  background: rgba(255, 254, 250, 0.9);
  box-shadow: var(--shadow);
}

.study-command,
.upload-mode-tabs,
.points-panel,
.split-status { min-width: 0; }

.upload-mode-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-muted);
}

.upload-mode-tab {
  display: grid;
  place-items: center;
  min-height: 42px;
  border-radius: 12px;
  color: var(--brand-strong);
  font-weight: 700;
  cursor: pointer;
}

.upload-mode-tab input { display: none; }
.upload-mode-tab.active {
  color: var(--surface-plain);
  background: var(--brand-strong);
}

.points-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-muted);
}

.points-panel-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

.points-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.75rem;
}

#pointsBalance {
  display: block;
  color: var(--brand-strong);
  font-size: 1.45rem;
  line-height: 1.1;
}

.split-status {
  grid-column: 1 / -1;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-muted);
}

.split-status:not([hidden]) { display: grid; }
.split-status-header { color: var(--brand-strong); font-weight: 800; }
.split-status-header.failed { color: var(--danger); }

.upload-dropzone {
  grid-row: span 3;
  min-height: 210px;
  border: 1px dashed rgba(36, 114, 95, 0.34);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 254, 250, 0.8), rgba(244, 240, 231, 0.82)),
    repeating-linear-gradient(135deg, rgba(36, 114, 95, 0.045), rgba(36, 114, 95, 0.045) 1px, transparent 1px, transparent 12px);
  display: grid;
  place-items: center;
  gap: 6px;
  padding: 22px;
  text-align: center;
  transition: border-color 180ms var(--ease-out), background 180ms var(--ease-out), transform 180ms var(--ease-out);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
  border-color: rgba(36, 114, 95, 0.72);
  background: var(--surface-plain);
  transform: translateY(-1px);
}

.upload-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--surface-plain);
  font-size: 1.18rem;
  background: var(--brand-strong);
}

.upload-title { margin: 0; font-weight: 800; }
.upload-hint { margin: 0; max-width: 460px; color: var(--text-muted); font-size: 0.86rem; line-height: 1.6; }

.workspace-rail {
  width: fit-content;
  max-width: 100%;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 254, 250, 0.72);
}

.chip.active {
  color: var(--surface-plain);
  border-color: var(--brand-strong);
  background: var(--brand-strong);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 14px;
  min-height: 0;
  overflow: hidden;
}

.list-panel,
.side-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
}

.mistake-list,
.mini-list,
.page-body,
.detail-modal-body,
.stats-grid {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.mistake-list,
.mini-list,
.page-body,
.stats-grid {
  min-height: 0;
  overflow-y: auto;
  align-content: start;
  padding-right: 3px;
}

.mistake-list::-webkit-scrollbar,
.mini-list::-webkit-scrollbar,
.page-body::-webkit-scrollbar,
.stats-grid::-webkit-scrollbar,
.detail-modal-body::-webkit-scrollbar { width: 7px; }

.mistake-list::-webkit-scrollbar-thumb,
.mini-list::-webkit-scrollbar-thumb,
.page-body::-webkit-scrollbar-thumb,
.stats-grid::-webkit-scrollbar-thumb,
.detail-modal-body::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(32, 39, 34, 0.18);
}

.mistake-card,
.review-card,
.stats-card,
.section-block,
.flash-card {
  padding: 14px;
  background: var(--surface-plain);
}

.mistake-card {
  display: grid;
  gap: 10px;
  border-radius: 14px;
}

.mistake-card:hover,
.mistake-card.active {
  border-color: rgba(36, 114, 95, 0.34);
  box-shadow: var(--shadow-sm);
}

.mistake-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  min-width: 0;
}

.mistake-top > div { min-width: 0; }
.mistake-title { margin: 0; font-weight: 800; }
.mistake-meta {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.55;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.analysis-progress { display: grid; gap: 7px; overflow: hidden; }
.progress-track {
  min-width: 0;
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(36, 114, 95, 0.12);
}
.progress-bar { height: 100%; border-radius: inherit; background: var(--brand); }
.progress-bar.failed { background: var(--danger); }
.progress-steps { display: flex; justify-content: space-between; gap: 8px; color: var(--text-muted); font-size: 0.76rem; }
.progress-steps .active { color: var(--brand-strong); font-weight: 800; }

.bottom-nav {
  --nav-count: 6;
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  padding: 4px;
  overflow: hidden;
  border: 1px solid rgba(50, 86, 74, 0.14);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 8px 32px rgba(31, 47, 42, 0.08), 0 1px 0 rgba(255, 255, 255, 0.6) inset;
}

.bottom-nav::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  width: calc((100% - 8px) / var(--nav-count));
  border-radius: 18px;
  background: linear-gradient(135deg, var(--brand), #3ba98a);
  box-shadow: 0 4px 12px rgba(46, 139, 114, 0.22);
  transform: translateX(calc(var(--nav-index, 0) * 100%));
  transition: transform 300ms var(--ease-spring);
  z-index: 0;
}

.nav-item {
  position: relative;
  z-index: 1;
  border-color: transparent;
  background: transparent;
  color: var(--brand-strong);
  font-weight: 800;
  border-radius: 18px;
  padding: 13px 10px;
  transition: color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.nav-item:hover {
  color: var(--brand-strong);
}

.nav-item.active { background: transparent; color: #f6fff9; transform: translateY(-1px); }

.page-panel.full-list-panel {
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  height: 100%;
  overflow: hidden;
}

.full-list-panel .mistake-list {
  height: 100%;
  min-height: 0;
}

.folder-sidebar {
  width: 210px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  border-right: 1px solid var(--line);
  background: rgba(255, 254, 250, 0.54);
}

.folder-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.folder-sidebar-header h3 { margin: 0; color: var(--brand-strong); font-size: 0.95rem; }
.folder-sidebar.collapsed { width: 0; padding: 0; border: 0; overflow: hidden; }
.collapse-btn { border: 1px solid var(--line); border-radius: 8px; background: var(--surface-plain); color: var(--text-muted); }

.folder-list {
  flex: 1;
  display: grid;
  align-content: start;
  gap: 4px;
  min-height: 0;
  overflow-y: auto;
}

.folder-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 9px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-main);
  cursor: pointer;
}

.folder-item:hover,
.folder-item.active {
  border-color: rgba(36, 114, 95, 0.22);
  background: var(--brand-soft);
}

.folder-item-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-item-name-input { flex: 1; min-width: 0; border: 1px solid var(--brand); border-radius: 8px; padding: 4px 8px; }
.folder-item-count { color: var(--text-muted); font-size: 0.75rem; }
.folder-item-actions { display: none; gap: 2px; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); background: inherit; }
.folder-item:hover .folder-item-actions { display: flex; }
.folder-item:hover .folder-item-count { display: none; }
.folder-item-actions button { border: 0; border-radius: 5px; background: transparent; color: var(--text-muted); }
.folder-sidebar-footer .ghost-button { width: 100%; }

/* 单一稳定工具栏：普通与批量状态同高，主按钮不随选择数量迁移 */
.mistake-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  min-height: 56px;
  padding: 8px 10px;
  border: 1px solid rgba(36, 114, 95, 0.14);
  border-radius: 16px;
  background: rgba(255, 254, 250, 0.86);
  box-shadow: var(--shadow-sm);
}
.mistake-toolbar[data-mode="select"] {
  border-color: rgba(36, 114, 95, 0.32);
  background: linear-gradient(135deg, rgba(36, 114, 95, 0.1), rgba(255, 254, 250, 0.9));
}
.mistake-toolbar-count { min-width: 96px; font-variant-numeric: tabular-nums; }
.mistake-toolbar-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-left: auto; }
.batch-more-menu { position: relative; }
.batch-more-menu > summary { list-style: none; cursor: pointer; }
.batch-more-menu > summary::-webkit-details-marker { display: none; }
.batch-more-popover {
  position: absolute;
  z-index: 12;
  top: calc(100% + 6px);
  right: 0;
  display: grid;
  min-width: 170px;
  gap: 4px;
  padding: 7px;
  border: 1px solid rgba(24, 79, 64, .13);
  border-radius: 11px;
  background: rgba(255, 255, 252, .99);
  box-shadow: 0 16px 38px rgba(28, 52, 43, .16);
}
.batch-more-popover .ghost-button { min-height: 40px; text-align: left; }

.export-mode-field {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 4px 6px 4px 12px;
  border: 1px solid rgba(36, 114, 95, 0.18);
  border-radius: 999px;
  color: var(--brand-strong);
  font-size: 0.82rem;
  font-weight: 800;
  background: rgba(255, 254, 250, 0.78);
}

.export-mode-field select {
  min-width: 132px;
  border: 0;
  border-radius: 999px;
  padding: 7px 30px 7px 11px;
  color: var(--text-main);
  font-weight: 700;
  background: var(--brand-soft);
  outline: 0;
}

.filter-bar { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; padding: 6px 0; }
.filter-bar select,
.filter-bar input {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 7px 10px;
  color: var(--text-main);
  background: var(--surface-plain);
}
.mistake-search-input { flex: 1 1 220px; min-width: 140px; }
.filter-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 4px 10px;
  border: 1px solid rgba(36, 114, 95, .22);
  border-radius: 999px;
  color: var(--brand-strong);
  background: var(--brand-soft, rgba(36, 114, 95, .12));
  font-size: .76rem;
  cursor: pointer;
}
.filter-chip span { color: var(--accent); font-weight: 800; }
.filter-reset { border: 0; color: var(--accent); background: transparent; }

/* 筛选抽屉：草稿在“应用”时一次提交 */
.filter-drawer-backdrop { position: fixed; z-index: 44; inset: 0; background: rgba(15, 31, 26, .32); backdrop-filter: blur(3px); }
.filter-drawer-backdrop[hidden] { display: none; }
.filter-drawer {
  position: fixed;
  z-index: 46;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(560px, calc(100vw - 24px));
  max-height: min(84vh, 720px);
  padding: 16px;
  border: 1px solid rgba(24, 79, 64, .16);
  border-radius: 18px;
  background: var(--surface-plain);
  box-shadow: 0 30px 60px rgba(20, 43, 35, .3);
}
.filter-drawer[hidden] { display: none; }
.filter-drawer-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.filter-drawer-header h3 { margin: 3px 0 0; font-family: "STSong", "SimSun", serif; font-size: 1.1rem; }
.filter-drawer-body { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; overflow-y: auto; }
.filter-drawer-field { display: grid; gap: 5px; color: var(--text-muted); font-size: .78rem; }
.filter-drawer-field select,
.filter-drawer-field input {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  color: var(--text-main);
  background: var(--surface-plain);
}
.filter-drawer-actions { display: flex; justify-content: flex-end; gap: 8px; padding-top: 10px; border-top: 1px solid var(--line); }
@media (max-width: 720px) {
  .filter-drawer {
    top: auto; bottom: 0; left: 0; transform: none;
    width: 100%; max-height: 86vh;
    border-radius: 18px 18px 0 0;
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }
  .filter-drawer-actions > * { flex: 1; min-height: 44px; }
  .filter-chip { min-height: 36px; }
}

.mistake-card .select-checkbox {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  display: none;
  width: 18px;
  height: 18px;
  accent-color: var(--brand);
}
.mistake-card.select-mode { position: relative; padding-left: 42px; }
.mistake-card.select-mode .select-checkbox { display: block; }
.mistake-card.selected { border-color: var(--brand); background: var(--brand-soft); }

#pageReview .panel,
#pageStats .panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
  overflow: hidden;
}

.review-workspace {
  width: min(900px, 100%);
  margin: 0 auto;
}

.review-focus-card {
  border-color: rgba(32, 39, 34, 0.18);
  background:
    linear-gradient(180deg, rgba(255, 254, 250, 0.97), rgba(244, 240, 231, 0.82));
}

.flash-card {
  display: grid;
  gap: 14px;
  align-content: start;
  border-radius: 18px;
}

.review-template-switch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-muted);
}

.review-template-switch button {
  border: 0;
  border-radius: 12px;
  padding: 9px 12px;
  color: var(--brand-strong);
  background: transparent;
}
.review-template-switch button.active { color: var(--surface-plain); background: var(--brand-strong); }

.anki-original,
.wrong-notebook-original {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-plain);
}

.anki-section-title {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flash-image {
  max-height: 280px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.anki-card-grid,
.wrong-notebook-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.anki-mini-card,
.wrong-notebook-mask,
.wrong-notebook-cycle,
.anki-analysis-toggle {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-plain);
}

.anki-mini-card,
.wrong-notebook-mask { cursor: pointer; }
.anki-mini-card:hover,
.wrong-notebook-mask:hover { border-color: rgba(36, 114, 95, 0.32); transform: translateY(-1px); }

.anki-mini-card-inner,
.wrong-notebook-mask,
.wrong-notebook-cycle,
.anki-analysis-toggle { padding: 13px 14px; }

.anki-mini-card:not(.is-revealed) .anki-mini-back,
.anki-mini-card.is-revealed .anki-mini-front { display: none; }

.anki-mini-face { display: grid; gap: 8px; }
.anki-mini-face-header,
.wrong-notebook-mask-head,
.wrong-notebook-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.anki-card-label { margin: 0; color: var(--accent); font-size: 0.78rem; font-weight: 800; }
.anki-hint,
.wrong-notebook-mask-head span { color: var(--text-muted); font-size: 0.76rem; }
.anki-card-body { overflow-wrap: anywhere; }

.wrong-notebook-head {
  align-items: flex-start;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.wrong-notebook-head h3 { margin: 0; color: var(--surface-ink); font-size: 1.3rem; }
.reviewed-at-visible { white-space: nowrap; }
.wrong-notebook-mask.is-revealed,
.wrong-notebook-mask.revealed { border-color: rgba(36, 114, 95, 0.34); background: rgba(36, 114, 95, 0.05); }
.mask-placeholder {
  display: grid;
  place-items: center;
  min-height: 48px;
  border-radius: 10px;
  color: var(--text-muted);
  background: repeating-linear-gradient(135deg, rgba(32, 39, 34, 0.08), rgba(32, 39, 34, 0.08) 8px, rgba(32, 39, 34, 0.03) 8px, rgba(32, 39, 34, 0.03) 16px);
}
.wrong-notebook-mask.is-revealed .mask-placeholder,
.wrong-notebook-mask.revealed .mask-placeholder { display: none; }
.wrong-notebook-red { color: var(--danger); }
.wrong-notebook-blue { color: #2f6f9e; }
.wrong-notebook-yellow { background: rgba(184, 106, 60, 0.08); }
.wrong-notebook-cycle ol { list-style: none; display: grid; gap: 8px; margin: 0; padding: 0; }
.wrong-notebook-cycle li { display: grid; grid-template-columns: auto auto minmax(0, 1fr); gap: 8px; color: var(--text-muted); }
.wrong-notebook-cycle li.is-done strong { color: var(--brand-strong); }
.wrong-notebook-cycle li em { font-style: normal; color: var(--text-main); overflow-wrap: anywhere; }

.anki-analysis-toggle summary {
  color: var(--brand-strong);
  font-weight: 800;
  cursor: pointer;
}
.anki-analysis-body { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line); }

.review-actions { justify-content: center; }
.review-btn { border: 1px solid var(--line); padding: 10px 16px; font-weight: 800; background: var(--surface-plain); }
.review-btn-pass { color: var(--brand-strong); border-color: rgba(36, 114, 95, 0.28); }
.review-btn-slow { color: var(--accent); border-color: rgba(184, 106, 60, 0.28); }
.review-btn-fail { color: var(--danger); border-color: rgba(179, 56, 46, 0.24); }
.pager-actions { align-items: center; justify-content: center; }
.pager-info { color: var(--text-muted); font-size: 0.84rem; }

#pageStats .stats-grid {
  grid-template-columns: 1fr;
  overflow-y: auto;
}
.stats-hero { text-align: center; padding: 10px 0 6px; }
.stats-hero-number {
  color: var(--brand-strong);
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1;
}
.stats-hero-label { color: var(--text-muted); }
.stats-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.stats-card strong { display: block; margin-bottom: 6px; color: var(--surface-ink); }
.stats-grid-3 .stats-card { max-height: none; overflow: visible; }
.stats-points-ledger { display: grid; gap: 8px; }
.stats-point-row {
  display: grid;
  grid-template-columns: minmax(110px, 0.8fr) auto minmax(160px, 1.4fr) auto;
  gap: 10px;
  align-items: center;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-muted);
  font-size: 0.84rem;
}
.stats-point-main strong { color: var(--brand-strong); margin-left: 4px; }
.stats-point-balance { color: var(--brand-strong); white-space: nowrap; }
.stats-point-note { color: var(--text-muted); overflow-wrap: anywhere; }
.stats-point-row time { color: var(--text-muted); white-space: nowrap; }

.heatmap-block h3 { margin: 0 0 8px; }
.heatmap-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(7, 1fr);
  grid-auto-flow: column;
  gap: 3px;
}
.hm-cell { width: 100%; aspect-ratio: 1; border-radius: 3px; background: rgba(36, 114, 95, 0.08); }
.hm-cell.hm-1 { background: rgba(36, 114, 95, 0.22); }
.hm-cell.hm-2 { background: rgba(36, 114, 95, 0.42); }
.hm-cell.hm-3 { background: rgba(36, 114, 95, 0.65); }
.hm-cell.hm-4 { background: rgba(36, 114, 95, 0.88); }
.heatmap-legend { display: flex; align-items: center; justify-content: flex-end; gap: 4px; margin-top: 6px; color: var(--text-muted); font-size: 0.75rem; }
.heatmap-legend .hm-cell { width: 14px; height: 14px; }

.settings-panel { width: min(900px, 100%); margin: 0 auto; }
.settings-readonly,
.settings-status-list,
.notion-sync-records { display: grid; gap: 10px; }
.settings-status-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-muted);
}

.editable-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.editable-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.editable-field .editable-display {
  min-height: 42px;
  padding: 9px 10px;
  border-radius: 10px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.editable-field .editable-control,
.editable-content { display: none; }
.editable-field.is-editing .editable-display { display: none; }
.editable-field.is-editing .editable-control,
.editable-field.is-editing .editable-content { display: block; }
.editable-content {
  min-height: 42px;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  padding: 9px 10px;
  background: var(--surface-plain);
}

.split-preview-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.split-preview-item {
  position: relative;
  display: grid;
  gap: 8px;
  overflow: hidden;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-plain);
}
.split-preview-title { display: flex; align-items: center; gap: 8px; font-weight: 800; overflow-wrap: anywhere; }
.split-preview-title input { width: 16px; height: 16px; margin: 0; accent-color: var(--brand); }
.split-preview-image { width: 100%; max-height: 420px; object-fit: contain; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.split-controls { display: flex; gap: 10px; flex-wrap: wrap; }
.manual-split-layer { position: absolute; inset: 0; pointer-events: none; }
.manual-split-rect { position: absolute; border: 2px solid var(--accent); background: rgba(184, 106, 60, 0.14); }
.manual-split-stage { touch-action: none; user-select: none; }

#expandSidebarButton { display: block !important; }
#expandSidebarButton[hidden] { display: none !important; }

@media (max-width: 980px) {
  .upload-card,
  .content-grid { grid-template-columns: 1fr; }
  .upload-dropzone { grid-row: auto; }
}

@media (max-width: 720px) {
  #pageMistakes.page-active { grid-template-columns: 1fr; }
  .folder-sidebar { display: none; }
  .folder-sidebar.mobile-expanded {
    position: fixed;
    z-index: 8;
    left: 8px;
    top: 8px;
    display: flex !important;
    width: min(280px, calc(100vw - 16px));
    height: calc(100vh - 84px);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface-plain);
    box-shadow: var(--shadow-lg);
  }
  .stats-grid-3,
  .stats-point-row,
  .editable-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .shell { height: auto; grid-template-rows: auto; gap: 8px; }
  .hero { padding: 12px 14px; border-radius: var(--radius-lg); }
  .hero h1 { font-size: 1.2rem; }
  .subtitle { font-size: 0.8rem; }
  .upload-card { padding: 10px; gap: 8px; }
  .study-command { padding: 10px; }
  .upload-dropzone { min-height: 120px; padding: 14px 10px; }
  .upload-icon { width: 38px; height: 38px; }
  .page.page-active { overflow: visible; animation: none; opacity: 1; transform: none; }
  #pageReview.page-active,
  #pageStats.page-active,
  #pageMistakes.page-active { min-height: 76vh; }
  .bottom-nav {
    position: fixed;
    left: 8px;
    right: 8px;
    bottom: max(6px, env(safe-area-inset-bottom));
    z-index: 5;
    border-radius: 16px;
    padding: 3px;
  }
  .bottom-nav::before { border-radius: 14px; }
  .nav-item { min-height: 44px; padding: 9px 2px; font-size: 0.7rem; border-radius: 14px; }
  .panel,
  .upload-card { padding: 10px; }
  .panel-header { flex-wrap: wrap; margin-bottom: 8px; }
  .mistake-card,
  .review-card,
  .stats-card,
  .section-block,
  .flash-card { padding: 10px; }
  .page-panel.full-list-panel,
  #pageReview .panel,
  #pageStats .panel { height: auto; min-height: 70vh; }
  .review-btn { width: 100%; }
  .split-preview-grid { grid-template-columns: 1fr; }
}

/* 后台导入任务与单列首页 */
.home-grid-single { grid-template-columns: minmax(0, 1fr); overflow: visible; }
.import-task-panel { display: grid; gap: 10px; min-width: 0; }
.import-task-list { display: grid; gap: 10px; }
.page-import-options { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, .8fr); gap: 10px; }
.page-import-options[hidden] { display: none; }
.import-field, .scan-toggle { display: grid; gap: 6px; min-width: 0; padding: 12px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface-muted); }
.import-field input { min-width: 0; }
.scan-toggle { grid-template-columns: auto minmax(0, 1fr); align-content: center; align-items: center; }
.scan-toggle input { width: 18px; height: 18px; margin: 0; accent-color: var(--brand); }
.scan-toggle small { grid-column: 2; color: var(--text-muted); overflow-wrap: anywhere; }
.selected-files-list {
  grid-column: 1 / -1;
  display: grid;
  gap: 8px;
  min-width: 0;
  min-height: 0;
  max-height: clamp(220px, 36vh, 420px);
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: rgba(21, 94, 74, .38) transparent;
  padding: 2px 4px 2px 0;
}
.selected-files-list::-webkit-scrollbar { width: 8px; }
.selected-files-list::-webkit-scrollbar-track { background: transparent; }
.selected-files-list::-webkit-scrollbar-thumb { border: 2px solid transparent; border-radius: 999px; background: rgba(21, 94, 74, .34); background-clip: padding-box; }
.selected-files-list::-webkit-scrollbar-thumb:hover { background: rgba(21, 94, 74, .52); background-clip: padding-box; }
.selected-file-item { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-width: 0; padding: 9px 10px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-muted); }
.selected-file-item > div { display: grid; gap: 2px; min-width: 0; }
.selected-file-item strong { overflow-wrap: anywhere; word-break: break-word; }
.selected-file-item span { color: var(--text-muted); font-size: .76rem; }
.selected-file-item button { flex: 0 0 auto; }
.upload-actions { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.import-task-card { display: grid; gap: 9px; min-width: 0; padding: 12px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface-plain); }
.import-task-card.status-failed, .import-task-card.status-partial { border-color: rgba(176, 78, 60, .35); }
.import-task-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; min-width: 0; }
.import-task-head > div { display: grid; gap: 3px; min-width: 0; }
.import-task-head strong { overflow-wrap: anywhere; }
.import-task-head span:not(.badge) { color: var(--text-muted); font-size: .78rem; }
.import-task-meta { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; color: var(--text-muted); font-size: .76rem; }
.import-task-meta span { overflow-wrap: anywhere; }
.task-error { margin: 0; color: var(--danger); font-size: .8rem; overflow-wrap: anywhere; }
.backend-health-card { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface-muted); }
.bottom-nav { --nav-count: 5; grid-template-columns: repeat(5, minmax(0, 1fr)); }
@media (max-width: 640px) {
  .page-import-options { grid-template-columns: 1fr; }
  .selected-files-list { max-height: min(42vh, 320px); gap: 6px; padding-right: 2px; }
  .selected-file-item { gap: 8px; padding: 8px; }
  .selected-file-item button { width: auto; min-height: 44px; padding-inline: 14px; }
  .upload-actions, .import-task-head, .backend-health-card { align-items: stretch; flex-direction: column; }
  .upload-actions .primary-button { width: 100%; }
  .import-task-meta { grid-template-columns: 1fr; }
  .import-task-card { padding: 10px; }
}

.upload-dropzone { grid-row: auto; min-height: 160px; }


.authenticated-image[data-image-state="pending"],
.authenticated-image[data-image-state="loading"] {
  min-height: 10rem;
  background: linear-gradient(100deg, rgba(31, 79, 65, 0.06) 20%, rgba(31, 79, 65, 0.14) 40%, rgba(31, 79, 65, 0.06) 60%);
  background-size: 220% 100%;
  animation: authenticated-image-loading 1.4s ease-in-out infinite;
}

.authenticated-image[data-image-state="error"] {
  min-height: 8rem;
  background: rgba(120, 52, 43, 0.08);
  border: 1px dashed rgba(120, 52, 43, 0.34);
}

@keyframes authenticated-image-loading {
  to { background-position-x: -220%; }
}

@media (prefers-reduced-motion: reduce) {
  .authenticated-image { animation: none !important; }
}