:root {
  --bg: #f5efe4;
  --panel: #fffdf8;
  --line: #e8dbc3;
  --primary: #173755;
  --primary-soft: #edf3f8;
  --accent: #c2783a;
  --text: #1f2329;
  --muted: #6c727a;
  --danger: #b54a42;
  --shadow: 0 18px 40px rgba(75, 55, 22, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(240, 190, 111, 0.22), transparent 30%),
    linear-gradient(180deg, #f8f4ec 0%, var(--bg) 100%);
}

button,
input,
textarea,
select {
  font: inherit;
}

.hidden {
  display: none !important;
}

.auth-shell,
.app-shell {
  min-height: 100vh;
}

.auth-shell {
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(100%, 420px);
  padding: 32px;
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(23, 55, 85, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.auth-title {
  margin: 18px 0 10px;
  font-size: 28px;
}

.auth-copy {
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.75;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 700;
}

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.field-label-row label {
  margin-bottom: 0;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  min-height: 46px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.field textarea {
  min-height: 110px;
  resize: vertical;
}

.helper {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 18px 16px;
  border-right: 1px solid rgba(23, 55, 85, 0.08);
  background: #f7efe1;
}

.brand {
  padding: 20px 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, #1f4770 0%, #173755 100%);
  color: #fff;
  box-shadow: 0 14px 30px rgba(23, 55, 85, 0.14);
}

.brand-badge {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 12px;
  font-weight: 700;
}

.brand-title {
  margin: 12px 0 8px;
  font-size: 24px;
}

.brand-copy {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 18px;
  flex: 1;
  min-height: 0;
}

.menu-btn {
  width: 100%;
  padding: 16px 18px;
  border: 1px solid rgba(23, 55, 85, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
  color: #24405d;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(102, 73, 28, 0.05);
}

.menu-btn strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.menu-btn span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.menu-btn.active {
  background: #173755;
  color: #fff;
  border-color: transparent;
  box-shadow: 0 14px 26px rgba(23, 55, 85, 0.18);
}

.menu-btn.active span {
  color: rgba(255, 255, 255, 0.78);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 16px;
  background: transparent;
}

.main {
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.topbar h1 {
  margin: 0;
  font-size: 30px;
}

.topbar p {
  margin: 8px 0 0;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  gap: 12px;
}

.btn,
.icon-btn {
  border: 0;
  cursor: pointer;
}

.btn {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: #fff;
  color: var(--primary);
  border: 1px solid rgba(23, 55, 85, 0.12);
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
}

.btn.danger {
  color: var(--danger);
  border-color: rgba(181, 74, 66, 0.18);
}

.btn.block {
  width: 100%;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(23, 55, 85, 0.08);
  color: var(--primary);
  font-size: 24px;
  line-height: 1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card,
.panel {
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 22px;
}

.stat-value {
  margin: 0 0 8px;
  font-size: 30px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.panel {
  padding: 24px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 18px;
}

.panel-header-restore {
  align-items: flex-start;
}

.panel-header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex: 1;
  flex-wrap: wrap;
}

.panel-search-input {
  min-width: 320px;
  flex: 0 1 360px;
}

.panel-header h2 {
  margin: 0;
  font-size: 24px;
}

.panel-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(23, 55, 85, 0.08);
  background: linear-gradient(180deg, #fffdfa 0%, #f8f0e2 100%);
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.card-title {
  margin: 0;
  font-size: 18px;
}

.card-meta,
.pill-row,
.subtabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill,
.subtab {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: #f1e4cc;
  color: #7a5527;
  font-size: 12px;
}

.subtab {
  cursor: pointer;
  background: #fff;
  border: 1px solid rgba(23, 55, 85, 0.12);
  color: var(--primary);
}

.subtab.active {
  background: var(--primary);
  color: #fff;
}

.card-copy {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.card-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.card-actions .btn {
  min-height: 38px;
}

.empty {
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.55);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-grid .field.span-2 {
  grid-column: span 2;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
}

.modal-root {
  position: fixed;
  inset: 0;
  z-index: 1200;
}

.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.34);
}

.modal-panel {
  position: relative;
  width: min(960px, calc(100% - 32px));
  max-height: calc(100vh - 32px);
  margin: 16px auto;
  overflow: auto;
  padding: 24px;
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: 0 24px 50px rgba(32, 23, 11, 0.16);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 18px;
}

.modal-header h3 {
  margin: 0;
  font-size: 24px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 6px;
}

.hint-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
}

.paste-image-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  border: 1px dashed rgba(23, 55, 85, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  outline: none;
}

.paste-image-box:focus-within,
.paste-image-box:focus {
  border-color: rgba(23, 55, 85, 0.36);
  box-shadow: 0 0 0 3px rgba(23, 55, 85, 0.08);
}

.paste-image-box__hint {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.paste-image-box__url {
  min-height: 40px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(23, 55, 85, 0.12);
  background: #fff;
  color: var(--text);
}

.paste-image-box__preview {
  display: block;
  width: min(100%, 280px);
  border-radius: 14px;
  border: 1px solid rgba(23, 55, 85, 0.08);
  background: #fff;
}

.paste-image-box__empty {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(238, 242, 246, 0.7);
  color: var(--muted);
  font-size: 13px;
}

.library-ai-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.library-ai-toolbar,
.library-ai-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.library-ai-upload {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
  border: 1px dashed rgba(23, 55, 85, 0.18);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
}

.library-ai-file-name {
  font-size: 14px;
  color: var(--text);
}

.library-ai-hint {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.library-ai-preview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.library-ai-preview .field.span-2 {
  grid-column: span 2;
}

.library-ai-preview-box {
  min-height: 120px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  line-height: 1.75;
  white-space: pre-wrap;
}

.library-ai-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.library-ai-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(23, 55, 85, 0.08);
  color: var(--primary);
  font-size: 13px;
}

.library-ai-empty {
  padding: 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
}

.library-ai-loading {
  color: var(--primary);
  font-weight: 700;
}

.library-ai-trigger {
  min-height: 36px;
  padding: 0 18px;
  background: #173755;
  border-color: #173755;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 10px 22px rgba(23, 55, 85, 0.18);
}

.library-ai-trigger:hover {
  background: #12304a;
  border-color: #12304a;
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .sidebar-footer {
    margin-top: 18px;
  }

  .stats-grid,
  .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .main,
  .sidebar {
    padding: 18px;
  }

  .stats-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .library-ai-preview {
    grid-template-columns: 1fr;
  }

  .form-grid .field.span-2 {
    grid-column: span 1;
  }

  .topbar,
  .panel-header,
  .card-head,
  .hint-row {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-actions,
  .card-actions {
    flex-wrap: wrap;
  }

  .field-label-row {
    align-items: flex-start;
    flex-direction: column;
  }
}

.question-import-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.question-import-toolbar,
.question-import-panel-head,
.question-import-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.question-import-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.question-import-panel {
  min-width: 0;
  border: 1px solid rgba(23, 55, 85, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  padding: 18px;
}

.question-import-panel-head h3 {
  margin: 0;
  font-size: 20px;
}

.question-import-textarea {
  width: 100%;
  min-height: 520px;
  margin-top: 14px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid rgba(23, 55, 85, 0.12);
  background: #fff;
  color: var(--primary);
  resize: vertical;
  line-height: 1.8;
  box-sizing: border-box;
}

.question-import-preview {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 14px;
  max-height: 520px;
  overflow: auto;
}

.import-preview-card {
  display: flex;
  gap: 14px;
  border: 1px solid rgba(23, 55, 85, 0.08);
  border-radius: 20px;
  background: linear-gradient(180deg, #fffdfa 0%, #f8f0e2 100%);
  padding: 16px;
}

.import-preview-index {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(207, 171, 109, 0.24);
  color: #7a5527;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.import-preview-body {
  min-width: 0;
  flex: 1;
}

.import-preview-body h3,
.import-preview-body p {
  margin: 0;
}

.import-preview-body h3 {
  margin-top: 8px;
  font-size: 18px;
}

.import-preview-body p {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.8;
}

.import-options {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.import-options li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid rgba(23, 55, 85, 0.08);
}

.import-option-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.import-options li.active {
  border-color: rgba(207, 171, 109, 0.56);
  background: rgba(240, 214, 162, 0.18);
}

.preview-analysis {
  font-size: 14px;
}

.import-followup-box {
  margin-top: 12px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(23, 55, 85, 0.08);
  background: rgba(255, 255, 255, 0.72);
}

.import-followup-box p {
  margin-top: 8px;
}

.import-followup-item + .import-followup-item {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(23, 55, 85, 0.08);
}

.import-followup-item {
  display: block;
}

.import-followup-label {
  display: block;
  margin-top: 0;
  color: #173755;
  font-weight: 700;
}

.import-followup-value {
  display: block;
  margin-top: 6px;
  white-space: pre-wrap;
  line-height: 1.9;
}

.import-preview-image {
  display: block;
  width: min(100%, 320px);
  margin-top: 12px;
  border-radius: 14px;
  border: 1px solid rgba(23, 55, 85, 0.08);
  background: #fff;
  object-fit: contain;
}

.import-preview-image.is-analysis {
  margin-top: 10px;
}

.import-option-image {
  width: min(100%, 240px);
  margin-top: 0;
}

.library-table-wrap {
  overflow: auto;
  border: 1px solid rgba(23, 55, 85, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
}

.library-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

.users-table {
  min-width: 1260px;
}

.library-table th,
.library-table td {
  padding: 18px 16px;
  border-bottom: 1px solid rgba(23, 55, 85, 0.08);
  text-align: left;
  vertical-align: middle;
}

.library-table thead th {
  background: #eef2f6;
  color: var(--primary);
  font-weight: 700;
}

.library-table tbody tr:last-child td {
  border-bottom: 0;
}

.library-table-name {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.library-table-name strong {
  color: var(--primary);
  font-size: 18px;
}

.library-table-name span {
  color: var(--muted);
  font-size: 13px;
}

.invite-code-cell {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.invite-code-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(194, 120, 58, 0.12);
  color: #9a5b21;
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}

.hidden-field {
  display: none;
}

.col-index {
  width: 84px;
}

.col-time,
.col-count {
  width: 140px;
}

.col-actions {
  width: 220px;
}

.table-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.table-actions .btn {
  white-space: nowrap;
}

.question-row-main .library-table-name strong {
  font-size: 16px;
}

.question-row-main .library-table-name span {
  line-height: 1.7;
}

.modal-panel {
  width: min(100%, 1080px);
}

.modal-panel .chapter-editor .modal-actions {
  justify-content: flex-end;
}

.stat-card-clickable .stat-value,
.stat-card-clickable .stat-label {
  pointer-events: none;
}

.distributor-rate-input {
  min-width: 120px;
  flex: 0 0 120px;
}

.distributor-submit-row {
  display: flex;
  justify-content: flex-end;
}

.distributor-library-search {
  min-width: 0;
  width: 100%;
  margin-bottom: 12px;
}

.distributor-library-picker {
  border: 1px solid rgba(23, 55, 85, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.8);
  overflow: hidden;
}

.distributor-library-picker-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(23, 55, 85, 0.05);
  color: var(--muted);
  font-size: 13px;
}

.distributor-library-options {
  max-height: 280px;
  overflow: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.distributor-library-option {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(23, 55, 85, 0.1);
  border-radius: 14px;
  background: #fff;
  text-align: left;
  cursor: pointer;
}

.distributor-library-option strong,
.distributor-library-option span {
  display: block;
}

.distributor-library-option strong {
  color: var(--primary);
  font-size: 15px;
}

.distributor-library-option span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.distributor-library-option.active {
  border-color: rgba(23, 55, 85, 0.4);
  background: rgba(23, 55, 85, 0.06);
}

.distributor-code-table {
  min-width: 1220px;
}

.code-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(23, 55, 85, 0.08);
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-chip.is-unused {
  background: rgba(23, 55, 85, 0.08);
  color: var(--primary);
}

.status-chip.is-used {
  background: rgba(194, 120, 58, 0.14);
  color: #9a5b21;
}

.status-chip.is-void {
  background: rgba(181, 74, 66, 0.12);
  color: var(--danger);
}

.stat-card-clickable {
  cursor: pointer;
}

.stat-card-clickable:hover {
  transform: translateY(-2px);
  transition: transform 0.18s ease;
}

.orders-modal-table-wrap {
  max-height: 520px;
  overflow-y: auto;
  overflow-x: auto;
  border: 1px solid rgba(23, 55, 85, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
}

.modal-pagination-bar {
  margin-top: 16px;
}

.question-filter-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.question-filter-input,
.question-filter-select {
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(23, 55, 85, 0.12);
  background: #fff;
  color: var(--primary);
  box-sizing: border-box;
}

.question-filter-input {
  min-width: 320px;
  flex: 1 1 320px;
}

.question-filter-select {
  min-width: 180px;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(23, 55, 85, 0.12);
  color: var(--primary);
}

.checkbox-inline input {
  margin: 0;
}

.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
}

.pagination-total {
  color: var(--muted);
  font-size: 14px;
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pagination-status {
  min-width: 72px;
  text-align: center;
  color: var(--primary);
  font-weight: 700;
}

@media (max-width: 980px) {
  .question-import-grid {
    grid-template-columns: 1fr;
  }

  .pagination-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .question-filter-input,
  .question-filter-select {
    width: 100%;
    min-width: 0;
  }
}

.chapter-editor {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 320px;
  overflow: auto;
  padding-right: 4px;
}

.chapter-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(23, 55, 85, 0.1);
}

.chapter-item span {
  color: var(--primary);
  font-weight: 600;
}

.chapter-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-sublist {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 22px;
}

.chapter-sublist-empty {
  padding-left: 22px;
  color: var(--muted);
  font-size: 13px;
}

.chapter-subitem {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(246, 248, 251, 0.92);
  border: 1px solid rgba(23, 55, 85, 0.08);
}

.chapter-subitem span {
  color: var(--text);
  font-size: 14px;
}

.chapter-add-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.chapter-add-row .question-filter-input {
  min-width: 0;
  flex: 1;
}

.chapter-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.chapter-ai-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chapter-ai-tree {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 380px;
  overflow: auto;
  padding-right: 4px;
}

.chapter-ai-group {
  padding: 16px;
  border: 1px solid rgba(23, 55, 85, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
}

.chapter-ai-group-title {
  margin: 0 0 10px;
  color: var(--primary);
  font-weight: 700;
}

.chapter-ai-children {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chapter-ai-child {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(23, 55, 85, 0.08);
  color: var(--text);
  font-size: 13px;
}

.question-bulk-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.question-row-main {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.question-row-check {
  min-height: auto;
  padding: 8px 10px;
  flex-shrink: 0;
}

.question-row-check span {
  display: inline-block;
  min-width: 1px;
}

.import-mode-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.import-mode-btn {
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(194, 120, 58, 0.25);
  background: rgba(240, 214, 162, 0.42);
  color: #9a642d;
  cursor: pointer;
  transition: all 0.2s ease;
}

.import-mode-btn.active {
  background: #173755;
  border-color: #173755;
  color: #fff;
}

.document-import-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 10px;
  padding: 18px;
  border-radius: 18px;
  border: 1px dashed rgba(194, 120, 58, 0.35);
  background: rgba(255, 250, 241, 0.92);
  color: var(--primary);
  line-height: 1.8;
}

.document-import-panel p {
  margin: 0;
}

.file-hint {
  color: var(--muted);
  font-size: 14px;
}

.import-loading-hint {
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
}

.col-index {
  width: 88px;
}

.col-time,
.col-count {
  width: 140px;
  white-space: nowrap;
}

.col-actions {
  width: 240px;
}

.table-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

@media (max-width: 980px) {
  .chapter-add-row {
    flex-direction: column;
    align-items: stretch;
  }

  .question-bulk-bar {
    align-items: stretch;
  }

  .question-bulk-bar .btn,
  .question-bulk-bar .question-filter-select,
  .chapter-add-row .btn {
    width: 100%;
  }

  .question-row-main {
    align-items: flex-start;
  }

  .import-mode-btn {
    width: 100%;
  }
}