/* L15 · 词汇浏览器（分页 / 筛选 / 搜索） */
.vb-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.55rem;
}
.vb-search {
  flex: 1 1 160px;
  min-width: 140px;
  padding: 0.4rem 0.6rem;
  border: 2px solid rgba(124, 58, 237, 0.35);
  border-radius: 10px;
  font-size: 0.88rem;
}
.vb-meta {
  font-size: 0.82rem;
  color: #64748b;
  margin-bottom: 0.35rem;
}
.vb-meta strong { color: #6d28d9; }
.vb-tabs { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.vb-tab {
  border: 2px solid rgba(124, 58, 237, 0.3);
  background: #fff;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.78rem;
  cursor: pointer;
}
.vb-tab.active {
  background: #7c3aed;
  color: #fff;
  border-color: #7c3aed;
}
.vb-year-sel {
  padding: 0.25rem 0.45rem;
  border-radius: 8px;
  border: 2px solid rgba(124, 58, 237, 0.3);
  font-size: 0.8rem;
}
.vb-list {
  padding-right: 0.25rem;
}

/* L15 课页内：词汇区纵向铺满 panel，列表内部滚动 */
#l15-book .l15-vocab-browser {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
}
#l15-book .l15-vocab-browser .vb-meta,
#l15-book .l15-vocab-browser .vb-toolbar,
#l15-book .l15-vocab-browser .vb-tabs,
#l15-book .l15-vocab-browser .vb-pager {
  flex-shrink: 0;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-stepper-layout {
  flex: 1 1 auto;
  min-height: 0;
}
#l15-book .panel:has(.l15-vocab-browser),
#l15-book .panel:has([data-l15-vocab-browser]) {
  overflow: hidden;
}

/* 后缀实验室等：panel 内独立 vb-list */
#l15-book .panel > .vb-list {
  flex: 1 1 auto;
  min-height: 0;
  max-height: none !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #c7d2fe #f8fafc;
}
#l15-book .panel > .vb-list::-webkit-scrollbar {
  width: 6px;
  display: block;
}
#l15-book .panel > .vb-list::-webkit-scrollbar-thumb {
  background: #c7d2fe;
  border-radius: 999px;
}
#l15-book .l15-vocab-browser .vb-list {
  flex: 1 1 auto;
  min-height: 0;
  max-height: none !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #c7d2fe #f8fafc;
}
#l15-book .l15-vocab-browser .vb-list::-webkit-scrollbar {
  width: 6px;
  display: block;
}
#l15-book .l15-vocab-browser .vb-list::-webkit-scrollbar-thumb {
  background: #c7d2fe;
  border-radius: 999px;
}
@media (min-width: 860px) {
  #l15-book .l15-vocab-browser .vb-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
    align-content: start;
  }
  #l15-book .l15-vocab-browser .vocab-card {
    margin-bottom: 0;
    height: 100%;
  }
}
.vb-list.compact .phrase-block { margin: 0.25rem 0; padding: 0.4rem 0.55rem; }
.vb-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 0.55rem;
  padding-top: 0.45rem;
  border-top: 1px solid rgba(124, 58, 237, 0.2);
}
.vb-pager button {
  border: 2px solid rgba(124, 58, 237, 0.4);
  background: #ede9fe;
  border-radius: 10px;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  font-size: 0.85rem;
}
.vb-pager button:disabled { opacity: 0.45; cursor: not-allowed; }
.vb-status { font-size: 0.84rem; color: #475569; min-width: 7rem; text-align: center; }

/* —— 逐词 stepper 模式（一词一屏 + 单词列表）—— */
#l15-book .l15-vocab-browser.vb-stepper {
  min-height: 0;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-stepper-layout {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(148px, 220px) minmax(0, 1fr);
  gap: 0.55rem;
  margin-top: 0.15rem;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-word-list-wrap {
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: 2px solid #e0e7ff;
  border-radius: 12px;
  background: #f8fafc;
  overflow: hidden;
}
.vb-word-list-head {
  flex-shrink: 0;
  padding: 0.4rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 800;
  color: #4338ca;
  background: linear-gradient(180deg, #fff, #eef2ff);
  border-bottom: 1px solid #e0e7ff;
}
.vb-word-list-head span {
  font-weight: 600;
  color: #64748b;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-word-list {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 0.35rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #a5b4fc #f1f5f9;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-word-list::-webkit-scrollbar {
  width: 7px;
  display: block;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-word-list::-webkit-scrollbar-thumb {
  background: #a5b4fc;
  border-radius: 999px;
}
.vb-word-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  width: 100%;
  margin: 0 0 0.3rem;
  padding: 0.35rem 0.45rem;
  border: 2px solid transparent;
  border-radius: 9px;
  background: #fff;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.vb-word-item:hover {
  border-color: #c7d2fe;
  background: #eef2ff;
}
.vb-word-item.is-active {
  border-color: #6366f1;
  background: #e0e7ff;
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.18);
}
.vb-word-item-en {
  font-size: 0.8rem;
  font-weight: 800;
  color: #1e293b;
  line-height: 1.35;
  word-break: break-word;
}
.vb-word-item-meta {
  font-size: 0.68rem;
  color: #64748b;
  font-weight: 600;
}
.vb-word-list-empty,
.vb-stepper-empty {
  margin: 0.5rem;
  font-size: 0.84rem;
  color: #64748b;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-stepper-main {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-stepper-stage {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
#l15-book .l15-vocab-browser.vb-stepper .vb-stepper-stage .vocab-card {
  margin: 0;
  height: auto;
}
.vb-stepper-nav {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding-top: 0.35rem;
  border-top: 1px solid rgba(99, 102, 241, 0.2);
}
.vb-stepper-nav button {
  border: 2px solid rgba(99, 102, 241, 0.45);
  background: #eef2ff;
  border-radius: 10px;
  padding: 0.38rem 0.85rem;
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 700;
  color: #4338ca;
  font-family: inherit;
}
.vb-stepper-nav button:hover:not(:disabled) {
  background: #e0e7ff;
  border-color: #6366f1;
}
.vb-stepper-nav button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
@media (max-width: 720px) {
  #l15-book .l15-vocab-browser.vb-stepper .vb-stepper-layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(120px, 28vh) minmax(0, 1fr);
  }
}

.vb-tier {
  display: inline-block;
  font-size: 0.68rem;
  padding: 0.05rem 0.35rem;
  border-radius: 4px;
  margin-left: 0.35rem;
  vertical-align: middle;
}
.vb-tier.t2 { background: #dbeafe; color: #1d4ed8; }
.vb-tier.t3 { background: #fce7f3; color: #be185d; }
.vb-year-tag {
  font-size: 0.72rem;
  color: #7c3aed;
  margin-left: 0.35rem;
}
.bank-year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.45rem;
}
.bank-year-card {
  padding: 0.5rem 0.6rem;
  border: 2px solid rgba(124, 58, 237, 0.25);
  border-radius: 10px;
  background: #fff;
  font-size: 0.82rem;
}
.bank-year-card h4 { margin: 0 0 0.25rem; color: #6d28d9; font-size: 0.9rem; }

/* —— 九年词形变化归类 —— */
.wf-tax-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.65rem;
}
.wf-tax-stat {
  font-size: 0.82rem;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #ede9fe, #e0e7ff);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #4338ca;
}
.wf-tax-stat strong { font-size: 0.95rem; margin-right: 0.2rem; }
.wf-tax-year-card .wf-tax-answers {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.8rem;
  line-height: 1.45;
  color: #059669;
  font-weight: 700;
  margin: 0.25rem 0;
}
.wf-tax-bank { font-size: 0.78rem; color: #64748b; margin: 0.2rem 0 0; }
.wf-tax-bank-label { color: #94a3b8; font-weight: 700; }
.wf-tax-unused { font-size: 0.76rem; color: #94a3b8; margin: 0.35rem 0 0; font-style: italic; }
.wf-tax-hint { margin-top: 0.75rem !important; }
.wf-tax-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.55rem 0;
}
.wf-tax-tab {
  border: 2px solid rgba(99, 102, 241, 0.35);
  background: #fff;
  color: #4338ca;
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}
.wf-tax-tab.is-active {
  background: #6366f1;
  border-color: #6366f1;
  color: #fff;
}
.wf-tax-meta { font-size: 0.82rem; color: #64748b; margin: 0.25rem 0 0.45rem; }
.wf-tax-table { font-size: 0.8rem; }
.wf-tax-table .wf-tax-form { color: #059669; font-weight: 700; }
.wf-tax-table .wf-tax-rule { color: #64748b; font-size: 0.76rem; }
#l15-book .wf-tax-table .wf-tax-rule { max-width: none; }
.wf-tax-blank-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.45rem;
  margin-top: 0.5rem;
}
.wf-tax-blank-card {
  border: 2px solid #c7d2fe;
  border-radius: 12px;
  padding: 0.45rem 0.5rem;
  background: #fff;
  box-shadow: 0 1px 4px rgba(99, 102, 241, 0.08);
}
.wf-tax-blank-n {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  color: #6366f1;
  background: #eef2ff;
  border-radius: 6px;
  padding: 0.05rem 0.35rem;
  margin-bottom: 0.25rem;
}
.wf-tax-blank-pair {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 800;
  line-height: 1.35;
}
.wf-tax-blank-pair .wf-base { color: #4338ca; }
.wf-tax-blank-pair .wf-arrow { color: #94a3b8; margin: 0 0.15rem; }
.wf-tax-blank-pair .wf-form { color: #059669; }
.wf-tax-blank-type { margin: 0.2rem 0 0; font-size: 0.74rem; color: #7c3aed; font-weight: 700; }
.wf-tax-blank-rule { margin: 0.15rem 0 0; font-size: 0.72rem; color: #64748b; line-height: 1.4; }
.wf-tax-highlights {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.wf-tax-highlights li {
  padding: 0.45rem 0.55rem;
  border-radius: 10px;
  border: 1px solid #e0e7ff;
  background: #fafafa;
  font-size: 0.84rem;
  line-height: 1.45;
}
.wf-tax-highlights strong { color: #4338ca; display: block; margin-bottom: 0.15rem; }
.wf-tax-highlights span { color: #475569; }

/* —— 按年份详解 · 互动填空 —— */
.wf-drill-bank {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0.45rem 0 0.55rem;
  padding: 0.45rem 0.55rem;
  border-radius: 12px;
  border: 2px dashed #c7d2fe;
  background: #fafafa;
}
.wf-drill-bank-label {
  font-size: 0.76rem;
  font-weight: 800;
  color: #6366f1;
  margin-right: 0.25rem;
}
.wf-drill-chip {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: #eef2ff;
  color: #4338ca;
  border: 1px solid #c7d2fe;
}

#l15-book .panel.panel--scroll:has([data-l15-wf-taxonomy-year]) {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

[data-l15-wf-taxonomy-year] {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

[data-l15-wf-taxonomy-year] > .zh-hint,
[data-l15-wf-taxonomy-year] > .wf-tax-tabs,
[data-l15-wf-taxonomy-year] > .wf-drill-bank {
  flex-shrink: 0;
}
.wf-drill-layout {
  display: grid;
  grid-template-columns: 1fr minmax(220px, 34%);
  gap: 0.65rem;
  flex: 1 1 auto;
  min-height: 0;
  align-items: stretch;
}
[data-l15-wf-taxonomy-year] .wf-drill-layout {
  flex: 1 1 auto;
  min-height: 0;
}
@media (max-width: 760px) {
  .wf-drill-layout {
    grid-template-columns: 1fr;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #a5b4fc #f1f5f9;
  }
  .wf-drill-layout::-webkit-scrollbar {
    width: 9px;
    display: block;
  }
  .wf-drill-passage-wrap {
    min-height: min(52vh, 480px);
  }
}

.wf-drill-passage-wrap {
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: 2px solid #e0e7ff;
  border-radius: 14px;
  background: #fff;
  overflow: hidden;
}
.wf-drill-passage-title {
  margin: 0;
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  font-weight: 800;
  color: #4338ca;
  background: linear-gradient(180deg, #f8fafc, #eef2ff);
  border-bottom: 1px solid #e0e7ff;
  flex-shrink: 0;
}
.wf-drill-passage {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 0.85rem 0.9rem 1rem;
  font-size: 0.95rem;
  line-height: 2.15;
  color: #1e293b;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #a5b4fc #f1f5f9;
}
.wf-drill-passage::-webkit-scrollbar {
  width: 9px;
  display: block;
}
.wf-drill-passage::-webkit-scrollbar-thumb {
  background: #a5b4fc;
  border-radius: 999px;
}
.wf-drill-passage::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 999px;
}

.wf-drill-blank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 0.15rem;
  padding: 0.12rem 0.75rem;
  min-width: 5.25rem;
  min-height: 2em;
  border: 2px solid #a5b4fc;
  border-radius: 8px;
  background: #fff;
  color: #4338ca;
  font-weight: 800;
  font-size: 0.92em;
  font-family: inherit;
  cursor: pointer;
  vertical-align: middle;
  line-height: 1.35;
  letter-spacing: 0.02em;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.wf-drill-blank:hover {
  background: #eef2ff;
  border-color: #6366f1;
}
.wf-drill-blank.is-active {
  border-color: #6366f1;
  background: #e0e7ff;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}
.wf-drill-blank.is-revealed {
  border-color: #059669;
  background: linear-gradient(180deg, #ecfdf5, #d1fae5);
  color: #047857;
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.22);
  animation: wf-blank-reveal 0.35s ease;
}
.wf-drill-blank.is-active.is-revealed {
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.35);
}
@keyframes wf-blank-reveal {
  from { transform: scale(0.96); opacity: 0.7; }
  to { transform: none; opacity: 1; }
}

.wf-drill-guide {
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: 2px solid #c7d2fe;
  border-radius: 14px;
  background: linear-gradient(180deg, #fff, #f8fafc);
  overflow: hidden;
  position: relative;
  z-index: 2;
}
.wf-drill-guide-empty {
  padding: 0.75rem;
  font-size: 0.84rem;
  line-height: 1.55;
  color: #64748b;
}
.wf-drill-guide-empty strong { color: #4338ca; }
.wf-drill-guide-panel {
  padding: 0.65rem 0.7rem;
  overflow-x: hidden;
  overflow-y: auto;
  flex: 1 1 auto;
  min-height: 0;
  scrollbar-width: thin;
  scrollbar-color: #a5b4fc #f1f5f9;
  -webkit-overflow-scrolling: touch;
}
.wf-drill-guide-panel::-webkit-scrollbar {
  width: 9px;
  display: block;
}
.wf-drill-guide-panel::-webkit-scrollbar-thumb {
  background: #a5b4fc;
  border-radius: 999px;
}
.wf-drill-guide-panel::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 999px;
}
.wf-drill-guide-title {
  margin: 0 0 0.4rem;
  font-size: 0.92rem;
  color: #4338ca;
}
.wf-drill-guide-pair {
  margin: 0 0 0.35rem;
  font-weight: 900;
  font-size: 1rem;
}
.wf-drill-guide-pair .wf-form.is-hidden {
  color: #94a3b8;
  font-weight: 700;
}
.wf-drill-guide-pair .wf-form.is-shown {
  color: #059669;
}
.wf-drill-guide-type {
  margin: 0 0 0.45rem;
  font-size: 0.76rem;
  font-weight: 700;
  color: #7c3aed;
  line-height: 1.45;
}
.wf-drill-guide-qs {
  margin: 0 0 0.55rem;
  padding-left: 1.15rem;
  font-size: 0.82rem;
  line-height: 1.55;
  color: #334155;
}
.wf-drill-guide-qs li { margin: 0.35rem 0; }
.wf-guide-q-n {
  font-weight: 800;
  color: #6366f1;
}
.wf-drill-show-btn {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.45rem 0.75rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-weight: 800;
  font-size: 0.88rem;
  cursor: pointer;
  font-family: inherit;
}
.wf-drill-show-btn:hover { filter: brightness(1.06); }
.wf-drill-ans-banner {
  margin: 0.45rem 0 0;
  padding: 0.5rem 0.6rem;
  border-radius: 10px;
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  border: 2px solid #34d399;
  color: #047857;
  font-size: 0.95rem;
  font-weight: 800;
}

/* —— 引导问 · 逐题 stepper —— */
.wf-drill-q-stepper {
  margin: 0.35rem 0 0.5rem;
}
.wf-drill-q-progress {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: #6366f1;
}
.wf-drill-q-progress strong {
  font-size: 0.92rem;
}
.wf-drill-q-card {
  padding: 0.65rem 0.7rem;
  border-radius: 12px;
  border: 2px solid #c7d2fe;
  background: linear-gradient(180deg, #fff, #f8fafc);
  font-size: 0.88rem;
  line-height: 1.65;
  color: #1e293b;
  min-height: 4.5rem;
}
.wf-drill-q-card-inner {
  line-height: 1.65;
}
.wf-drill-q-reveals {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.55rem;
}
.wf-drill-q-reveal {
  display: block;
  width: 100%;
  padding: 0.4rem 0.5rem;
  border: 2px dashed #c7d2fe;
  border-radius: 9px;
  background: #fafafa;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  touch-action: manipulation;
}
.wf-drill-q-reveal:hover {
  border-color: #a5b4fc;
  background: #eef2ff;
}
.wf-drill-q-reveal-hint {
  font-size: 0.78rem;
  font-weight: 700;
  color: #6366f1;
}
.wf-drill-q-reveal-body {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.86rem;
  font-weight: 800;
  color: #059669;
  line-height: 1.5;
}
.wf-drill-q-reveal-body[hidden] {
  display: none !important;
}
.wf-drill-q-reveal--inline {
  display: inline;
  width: auto;
  padding: 0.05rem 0.35rem;
  margin: 0 0.08rem;
  vertical-align: baseline;
  border-width: 1px;
  border-radius: 6px;
}
.wf-drill-q-reveal--inline .wf-drill-q-reveal-hint {
  font-size: 0.72rem;
}
.wf-drill-q-reveal--inline .wf-drill-q-reveal-body {
  display: inline;
  margin-top: 0;
  font-size: inherit;
}
.wf-drill-q-card .wf-guide-q-n {
  font-weight: 800;
  color: #6366f1;
  margin-right: 0.15rem;
}
.wf-drill-q-nav {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.45rem;
  position: relative;
  z-index: 3;
}
.wf-drill-q-btn {
  flex: 1 1 auto;
  padding: 0.38rem 0.55rem;
  border: 2px solid rgba(99, 102, 241, 0.45);
  border-radius: 10px;
  background: #eef2ff;
  color: #4338ca;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: inherit;
  position: relative;
  z-index: 4;
  touch-action: manipulation;
}
.wf-drill-q-btn:hover:not(:disabled) {
  background: #e0e7ff;
  border-color: #6366f1;
}
.wf-drill-q-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.wf-drill-q-hint {
  margin: 0.4rem 0 0;
  font-size: 0.76rem;
  color: #64748b;
  font-style: italic;
}