:root {
  --bg: #f6f1e7;
  --panel: #fffaf2;
  --panel-strong: #fffdf8;
  --line: #dccdb6;
  --ink: #241c12;
  --muted: #776757;
  --accent: #8c4f22;
  --accent-strong: #6c3b18;
  --ok: #1c7c54;
  --bad: #a63d40;
  --shadow: 0 12px 30px rgba(55, 31, 11, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(140, 79, 34, 0.10), transparent 20%),
    linear-gradient(180deg, #f5efe4 0%, var(--bg) 100%);
  color: var(--ink);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px 1fr;
}

.sidebar {
  padding: 24px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 251, 244, 0.95), rgba(246, 237, 221, 0.92));
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.main-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 18px;
  padding: 24px;
}

.bottom-panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding: 0 24px 24px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.brand h1, .section-head h2, h3 {
  margin: 0 0 8px;
  font-family: Georgia, "Times New Roman", serif;
}

.brand-kicker {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.brand p, .muted { color: var(--muted); }
.small { font-size: 13px; }

label {
  display: block;
  margin: 12px 0 6px;
  font-size: 14px;
  color: var(--muted);
}

input[type="text"], select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--panel-strong);
  color: var(--ink);
}

textarea {
  resize: vertical;
  min-height: 140px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

button:hover { transform: translateY(-1px); }

.primary { background: var(--accent); color: #fff; }
.secondary { background: #ead8c2; color: var(--ink); }
.ghost, .ghost-select {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}

.ghost-select {
  border-radius: 999px;
  padding: 8px 12px;
  width: auto;
}

.full { width: 100%; }

.small {
  padding: 7px 11px;
  font-size: 12px;
}

.check-grid, .action-grid {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

.check-grid label {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.action-grid {
  grid-template-columns: 1fr 1fr;
}

.question-list {
  height: calc(100vh - 48px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.list {
  margin-top: 8px;
  overflow-y: auto;
  display: grid;
  gap: 5px;
}

.question-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-strong);
  cursor: pointer;
  text-align: left;
}

.question-card.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.question-card .meta {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 2px;
}

.section-head, .action-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.wrap {
  flex-wrap: wrap;
}

.content-block {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.text-block {
  white-space: pre-wrap;
  line-height: 1.7;
}

.rich-block {
  white-space: normal;
}

.case-copy {
  white-space: pre-wrap;
}

.case-media-strip {
  margin-top: 12px;
}

.rich-block img,
.option img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 10px 0;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
}

.rich-block table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  background: #fff;
}

.rich-block td,
.rich-block th {
  border: 1px solid var(--line);
  padding: 8px 10px;
  vertical-align: top;
}

.option {
  white-space: normal;
}

.option-letter {
  font-weight: 700;
}

.option-line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
}

.option-body > :first-child {
  margin-top: 0;
}

.option-body > :last-child {
  margin-bottom: 0;
}

.options {
  display: grid;
  gap: 10px;
}

.option {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: var(--panel-strong);
  text-align: left;
}

.option.selected {
  border-color: var(--accent);
  background: #f8ecdf;
}

.option.correct { border-color: var(--ok); }
.option.incorrect { border-color: var(--bad); }

.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #f0dfcb;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--accent-strong);
}

.stats-list, .table-list {
  display: grid;
  gap: 8px;
}

.stat-row, .table-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 14px;
}

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

.compact-list .table-row {
  padding: 8px 10px;
}

.table-row button {
  padding: 6px 10px;
}

.mock-history-list {
  margin-top: 10px;
}

.mock-diagnostics {
  display: grid;
  gap: 4px;
  margin: 8px 0;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
}

.mock-diagnostics:empty,
.mock-duplicate-audit:empty {
  display: none;
}

.mock-diagnostics .risk-high { color: var(--bad); font-weight: 600; }
.mock-diagnostics .risk-medium { color: #b45309; font-weight: 600; }
.mock-diagnostics .risk-low { color: var(--ok); font-weight: 600; }

.mock-duplicate-audit {
  display: grid;
  gap: 8px;
  margin: 8px 0;
}

.mock-duplicate-group {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
  font-size: 13px;
}

.mock-duplicate-refs {
  margin-top: 4px;
  color: var(--muted);
  line-height: 1.5;
}

.mock-history-row .row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.empty-state {
  display: grid;
  place-items: center;
  text-align: center;
  min-height: 60vh;
  color: var(--muted);
}

.result-text.ok { color: var(--ok); }
.result-text.bad { color: var(--bad); }

.hidden { display: none !important; }

@media (max-width: 1200px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .main-layout,
  .bottom-panels { grid-template-columns: 1fr; }
  .question-list { height: auto; }
}

.practice-shell {
  min-height: 100vh;
  padding: 20px 24px 24px;
}

.practice-topbar {
  padding: 18px;
  display: grid;
  gap: 14px;
}

.topbar-brand h1 {
  margin: 4px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 32px;
  line-height: 1.05;
}

.topbar-filters {
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  align-items: center;
}

.topbar-filters input,
.topbar-filters select {
  min-height: 40px;
  border-radius: 14px;
  padding: 9px 12px;
  font-size: 14px;
}

.topbar-filters select.yearless {
  color: var(--muted);
  background: rgba(255, 255, 255, 0.62);
}

.topbar-filters #searchInput,
.topbar-filters #reviewModeSelect {
  grid-column: 1 / -1;
}

.practice-sidebar {
  position: sticky;
  top: 20px;
  height: calc(100vh - 40px);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

.sidebar-filters {
  margin-top: 0;
}

/* ── 常驻科目/年份选择行 ──────────────────── */
.topbar-select-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.topbar-select-row select {
  min-height: 40px;
  border-radius: 14px;
  padding: 9px 12px;
  font-size: 14px;
}

/* ── 筛选折叠 + 刷新按钮并排行 ───────────── */
.filter-action-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: start;
  min-width: 0;
}

.refresh-inline-btn {
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 14px;
  font-weight: 650;
  white-space: nowrap;
}

/* ── 筛选折叠面板 ─────────────────────────── */
.filter-collapse {
  margin: 0;
  min-width: 0;
}

.filter-collapse > summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.85);
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  user-select: none;
  min-height: 40px;
}

.filter-collapse > summary::-webkit-details-marker { display: none; }
.filter-collapse > summary::marker { display: none; }

.filter-arrow {
  font-size: 11px;
  transition: transform 200ms ease;
}

.filter-collapse[open] .filter-arrow {
  transform: rotate(180deg);
}

.filter-collapse-body {
  display: grid;
  gap: 10px;
  padding-top: 10px;
}

.filter-collapse-body input[type="text"],
.filter-collapse-body select {
  width: 100%;
  min-height: 40px;
  border-radius: 14px;
  padding: 9px 12px;
  font-size: 14px;
}

/* ── 工具箱按钮（始终显示） ─────────────────── */
.sidebar-drawer-btn {
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 14px;
  font-weight: 650;
  width: 100%;
}

/* ── 折叠区内操作按钮 ────────────────────── */
.compact-actions {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.compact-actions button {
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 14px;
  font-weight: 650;
}

.sidebar-toggle-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-top: 0;
}

.sidebar-stats {
  margin-top: 0;
}

.sidebar-actions {
  margin: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.sidebar-actions button {
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 14px;
  font-weight: 650;
}

/* toolDrawerBtn is now a standalone .sidebar-drawer-btn outside sidebar-actions */

.inline-check {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.85);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
}

.inline-check input {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.stat-chip {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  justify-content: start;
  gap: 6px;
  min-height: 48px;
  padding: 8px 12px;
  border-radius: 14px;
  background: rgba(255, 250, 242, 0.96);
  border: 1px solid var(--line);
  color: var(--muted);
  min-width: 0;
  white-space: nowrap;
}

.stat-chip strong {
  font-size: 20px;
  line-height: 1;
  color: var(--ink);
}

.practice-workspace {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.question-rail {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.question-rail-list {
  padding-right: 4px;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.rail-card {
  padding: 6px 10px;
  border-radius: 12px;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

.rail-card:hover {
  transform: translateY(-1px);
  border-color: rgba(140, 79, 34, 0.45);
}

.rail-card.active {
  background: #f7eadc;
  box-shadow: inset 0 0 0 1px var(--accent);
}

.rail-card.done-correct {
  border-left: 4px solid var(--ok);
}

.rail-card.done-wrong {
  border-left: 4px solid var(--bad);
}

.rail-card.done-answered {
  border-left: 4px solid var(--muted);
}

.stem-preview-text {
  font-size: 11px;
  color: var(--muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  margin-top: 2px;
  line-height: 1.4;
}

.rail-card.done-starred {
  border-left: 4px solid var(--accent);
}

.rail-card.is-starred {
  box-shadow: inset 2px 0 0 var(--accent);
}

.question-stage {
  min-height: calc(100vh - 44px);
  padding: 24px 28px 28px;
  position: relative;
}

/* ── 题库栏收起按钮（题目区左上角的简洁控件） ─────────────────────────── */
.stage-collapse-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 150ms ease, background 150ms ease, border-color 150ms ease;
}

.stage-collapse-btn:hover {
  color: var(--accent);
  border-color: rgba(140, 79, 34, 0.45);
  background: var(--panel-strong);
}

/* ── 收起状态：题库栏完全隐藏，题目区占满整行 ─────────────────────────── */
.practice-workspace.sidebar-hidden {
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.practice-workspace.sidebar-hidden .practice-sidebar {
  display: none;
}

.question-stage-head {
  align-items: flex-start;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(220, 205, 182, 0.7);
}

.question-canvas {
  max-width: 980px;
  margin: 0 auto;
}

.stage-block {
  margin-top: 18px;
  padding: 18px 20px;
  border: 1px solid rgba(220, 205, 182, 0.8);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.86);
}

.stage-block.content-block {
  border-top: 1px solid rgba(220, 205, 182, 0.8);
}

.stage-stem {
  margin-top: 8px;
}

.stage-case {
  background: rgba(245, 240, 228, 0.9);
  border-style: dashed;
}

.stage-case .text-block {
  color: #5a5141;
  font-size: 15px;
}

.stage-block h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.stage-stem .text-block,
.fold-card-body .text-block,
.option {
  font-size: 16px;
  line-height: 1.85;
}

.options {
  margin-top: 10px;
  gap: 12px;
}

.option {
  padding: 16px 18px;
  border-radius: 16px;
}

.option:hover {
  border-color: rgba(140, 79, 34, 0.45);
  background: #fcf4ea;
}

.answer-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.answer-submit {
  min-width: 128px;
}

.fold-card {
  margin-top: 16px;
  border: 1px solid rgba(220, 205, 182, 0.8);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.86);
  overflow: hidden;
}

.fold-card summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 700;
  color: var(--ink);
}

.fold-card summary::-webkit-details-marker {
  display: none;
}

.fold-card summary::after {
  content: "展开";
  float: right;
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
}

.fold-card[open] summary::after {
  content: "收起";
}

.fold-card-body {
  padding: 0 20px 18px;
  border-top: 1px solid rgba(220, 205, 182, 0.65);
}

.ai-section {
  padding: 16px 0;
  border-bottom: 1px dashed rgba(220, 205, 182, 0.75);
}

.ai-section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.ai-section h3 {
  margin-bottom: 10px;
  font-size: 16px;
}

#explanationText,
#aiExplanation {
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #3b3125;
  font-size: 14.5px;
  line-height: 1.72;
}

#explanationText {
  white-space: pre-line;
}

#explanationText.rich-block,
#aiExplanation {
  white-space: normal;
}

#aiExplanation {
  line-height: 1.62;
}

#explanationText p,
#aiExplanation p,
#explanationText ul,
#explanationText ol,
#aiExplanation ul,
#aiExplanation ol {
  margin: 3px 0;
}

#explanationText ul,
#explanationText ol,
#aiExplanation ul,
#aiExplanation ol {
  padding-left: 20px;
}

#explanationText h1,
#explanationText h2,
#explanationText h3,
#aiExplanation h1,
#aiExplanation h2,
#aiExplanation h3 {
  margin: 8px 0 4px;
  font-size: 15px;
  color: var(--accent);
}

#explanationText li,
#aiExplanation li {
  margin: 3px 0;
}

#explanationText br + br,
#aiExplanation br + br {
  display: none;
}

#explanationText > :first-child,
#aiExplanation > :first-child {
  margin-top: 0;
}

#explanationText > :last-child,
#aiExplanation > :last-child {
  margin-bottom: 0;
}

.tool-drawer-scrim {
  position: fixed;
  inset: 0;
  background: rgba(36, 28, 18, 0.28);
  z-index: 39;
}

.tool-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 40;
  width: min(86vw, 1440px);
  min-width: 920px;
  max-width: 100vw;
  height: 100vh;
  padding: 24px 28px;
  background: linear-gradient(180deg, rgba(255, 251, 244, 0.98), rgba(246, 237, 221, 0.98));
  border-left: 1px solid var(--line);
  box-shadow: -18px 0 40px rgba(36, 28, 18, 0.14);
  display: flex;
  flex-direction: column;
}

.tool-drawer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(220, 205, 182, 0.9);
}

.tool-drawer-head h2 {
  margin: 4px 0 0;
}

.tool-drawer-body {
  padding-top: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tool-group {
  border: 1px solid rgba(220, 205, 182, 0.9);
  border-radius: 16px;
  background: rgba(255, 253, 248, 0.92);
  overflow: visible;
  min-width: 0;
  height: auto;
}

.tool-group-title {
  padding: 14px 16px;
  font-weight: 700;
  background: rgba(246, 237, 221, 0.5);
  border-bottom: 1px solid rgba(220, 205, 182, 0.8);
}

.tool-group-body {
  padding: 0 16px 16px;
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  overflow: visible;
}

.tool-group-body label {
  margin: 4px 0 2px;
  font-weight: 600;
}

.tool-group-body .action-row {
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  row-gap: 8px;
}

.tool-group-body .action-row .muted {
  max-width: 100%;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.tool-group-body .table-list {
  max-height: 320px;
  overflow-y: auto;
  padding-right: 2px;
  min-width: 0;
}

.tool-group-body .table-row {
  gap: 8px;
  overflow-wrap: anywhere;
}

.tool-group-body p {
  margin: 0;
}

.tool-group-body input[type="text"],
.tool-group-body select,
.tool-group-body textarea {
  min-width: 0;
  min-height: 46px;
  background: #fffdfa;
  border-color: #d2bf9f;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.tool-group-body .check-grid {
  grid-template-columns: 1fr;
}

.tool-group-body .action-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

body.drawer-open {
  overflow: hidden;
}

@media (max-width: 1320px) {
  .practice-workspace {
    grid-template-columns: 300px minmax(0, 1fr);
  }
}

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

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

  .question-rail {
    flex: none;
    max-height: none;
    min-height: 0;
  }

  .question-stage {
    max-height: none;
    min-height: 0;
  }

  .question-rail-list {
    max-height: 280px;
    overflow-y: auto;
  }

  .tool-drawer {
    width: min(88vw, 960px);
    min-width: 0;
  }
}

/* ── HTML 文件上传输入框 ───────────────────── */
.html-file-input {
  display: block;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-strong);
  color: var(--ink);
  font-size: 14px;
  cursor: pointer;
}

.html-file-input::file-selector-button {
  border: none;
  border-radius: 999px;
  padding: 6px 14px;
  background: #ead8c2;
  color: var(--ink);
  cursor: pointer;
  margin-right: 10px;
  font-size: 13px;
}

/* ── #9 备考倒计时 ─────────────────────────── */
.exam-countdown-bar {
  margin-top: 0;
  padding: 9px 14px;
  border-radius: 14px;
  background: rgba(255, 250, 242, 0.96);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  display: none;
}

.exam-countdown-bar:not(:empty) {
  display: block;
}

.exam-countdown-bar .exam-days {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  margin-right: 2px;
}

.exam-countdown-bar.exam-urgent {
  border-color: var(--bad);
  background: #fff2f2;
  color: var(--bad);
}

.exam-countdown-bar.exam-urgent .exam-days {
  color: var(--bad);
}

.exam-countdown-bar.exam-past {
  color: var(--muted);
  font-style: italic;
}

.exam-date-row {
  margin-top: 0;
}

.exam-date-row input[type="date"] {
  width: 100%;
  font-size: 13px;
  min-height: 40px;
  padding: 8px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--muted);
  cursor: pointer;
}

/* ── #8 考点速记卡 ─────────────────────────── */
.takeaway-card {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 14px;
  padding: 12px 16px;
  background: #fffbe6;
  border: 1px solid #f0d060;
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.65;
}

.takeaway-label {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #9a7600;
  background: #f5e070;
  border-radius: 6px;
  padding: 2px 7px;
  margin-top: 2px;
}

/* ── #12 可信度徽章 ────────────────────────── */
.confidence-badge {
  display: inline-block;
  margin: 6px 0 10px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.confidence-high {
  background: #e6f4ec;
  color: var(--ok);
  border: 1px solid #b8dfc8;
}

.confidence-medium {
  background: #f5f0e8;
  color: #7a6030;
  border: 1px solid #e0d0a0;
}

.confidence-low {
  background: #fff0f0;
  color: var(--bad);
  border: 1px solid #f0c0c0;
}

/* ── #1 错因分析区域 ───────────────────────── */
.wrong-answer-divider {
  margin: 14px 0 12px;
  border-top: 1px dashed var(--line);
}

.wrong-explain-btn {
  width: 100%;
}

.wrong-answer-block {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.wrong-trap {
  padding: 10px 14px;
  background: #fff3cd;
  border: 1px solid #f0c040;
  border-radius: 12px;
  font-size: 14px;
  color: #7a5800;
  font-weight: 600;
}

.wrong-why {
  padding: 10px 14px;
  background: #fff0f0;
  border: 1px solid #f0c0c0;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.7;
}

.wrong-correct {
  padding: 10px 14px;
  background: #f0faf4;
  border: 1px solid #b8dfc8;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.7;
}


/* ── Feature 3: AI 变形题 ──────────────────────────── */
.variant-content {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}

.variant-stem {
  font-size: 14.5px;
  line-height: 1.75;
  padding: 12px 14px;
  background: rgba(246, 237, 221, 0.7);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  white-space: pre-wrap;
}

.variant-options {
  display: grid;
  gap: 6px;
}

.variant-option {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13.5px;
  white-space: pre-wrap;
  background: var(--panel);
}

.variant-option.variant-correct {
  border-color: var(--ok);
  color: var(--ok);
  background: rgba(28, 124, 84, 0.06);
  font-weight: 600;
}

.variant-answer {
  font-size: 12.5px;
  color: var(--ok);
}

.variant-explanation {
  font-size: 13.5px;
  line-height: 1.7;
  padding: 10px 14px;
  background: rgba(140, 79, 34, 0.05);
  border-radius: 6px;
  white-space: pre-wrap;
}

.scenario-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scenario-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  background: #fff;
}

.scenario-card h4 {
  margin: 0 0 6px;
  font-size: 14px;
}

.scenario-card p {
  margin: 6px 0;
  line-height: 1.7;
}

/* ── Feature 1 + 4: AI 学习分析面板 ─────────────────── */
.analysis-result {
  margin-top: 12px;
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13.5px;
  line-height: 1.8;
  max-height: 600px;
  overflow-y: auto;
}

.analysis-result h1,
.analysis-result h2,
.analysis-result h3 {
  color: var(--accent);
  margin: 14px 0 6px;
}

.analysis-result ul,
.analysis-result ol {
  padding-left: 20px;
}

.analysis-result li {
  margin-bottom: 4px;
}

.analysis-result strong {
  color: var(--ink);
}

/* ── Danger ghost button ───────────────────────────────────────────────────── */

.danger-ghost {
  color: #b94040;
}

.danger-ghost:hover {
  background: #fdf0f0;
  border-color: #d88;
}

/* ── Chat bubble markdown ──────────────────────────────────────────────────── */

.chat-bubble strong { font-weight: 600; }
.chat-bubble em { font-style: italic; }
.chat-bubble code {
  background: var(--surface-raised);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 12px;
  font-family: "Cascadia Code", monospace;
}
.chat-bubble h1, .chat-bubble h2, .chat-bubble h3 {
  margin: 6px 0 3px;
  font-size: 14px;
}
.chat-bubble li { margin-left: 16px; }

/* ── KaTeX math rendering ────────────────────────────────────────────────── */

/* Block math: centre and give breathing room */
.katex-display {
  display: block;
  text-align: center;
  margin: 10px 0;
  overflow-x: auto;   /* scroll if formula is wider than container */
}

/* Inline math: keep it in line without jumping */
.katex {
  font-size: 1em;
}

/* Anywhere renderMarkdown() output appears */
#aiExplanation .katex-display,
#analysisResult .katex-display,
.chat-bubble .katex-display {
  margin: 8px 0;
}

/* ── Chat 教材引用切换 ─────────────────────────────────────────────────────── */

.rag-chat-toggles {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.rag-indicator {
  font-size: 11px;
  color: var(--accent);
  margin-left: auto;
}

/* ── Progress bar ──────────────────────────────────────────────────────────── */

.progress-bar-wrap {
  height: 6px;
  background: var(--surface-raised);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 6px;
}

.progress-bar {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.4s ease;
}

@media (max-width: 760px) {
  .practice-shell {
    padding-left: 14px;
    padding-right: 14px;
  }

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

  .question-stage {
    padding: 18px;
  }

  .question-stage-head,
  .answer-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .tool-drawer {
    width: 100vw;
    padding: 14px;
    min-width: 0;
  }

  .tool-group-body .action-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 440px) {
  .topbar-filters,
  .sidebar-toggle-list,
  .stats-strip,
  .sidebar-actions {
    grid-template-columns: 1fr;
  }

  .sidebar-actions #toolDrawerBtn {
    grid-column: auto;
  }
}

/* ── Mermaid diagrams ─────────────────────────────────────────────────────── */

.mermaid-output {
  text-align: center;
  margin: 12px 0;
  overflow-x: auto;
}

.mermaid-output svg {
  max-width: 100%;
  height: auto;
}

.mermaid-pending {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  margin: 8px 0;
}

.mermaid-source {
  font-size: 12px;
  color: var(--muted);
  display: block;
  white-space: pre;
}

.note-preview {
  margin-top: 10px;
  padding: 12px 14px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: var(--surface-raised);
  font-size: 14px;
  line-height: 1.55;
}

.note-preview.hidden {
  display: none;
}

.note-md-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 8px 0;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.focus-progress-bar {
  display: none;
  flex-direction: column;
  gap: 3px;
  margin: -8px 0 14px;
}
.focus-progress-track {
  height: 3px;
  background: rgba(140, 79, 34, 0.08);
  border-radius: 2px;
  overflow: hidden;
}
.focus-progress-covered {
  height: 100%;
  width: 0%;
  background: rgba(140, 79, 34, 0.45);
  transition: width 220ms ease;
}
.focus-progress-correct {
  height: 100%;
  width: 0%;
  background: var(--ok, #5a8f3d);
  transition: width 220ms ease;
}

body.focus-mode .question-rail { display: none; }
body.focus-mode .practice-workspace { grid-template-columns: 320px minmax(0, 1fr); }
body.focus-mode #questionTitle { font-size: 14px; font-weight: 500; color: var(--muted); margin: 0; opacity: 0.65; }
body.focus-mode #questionMeta { opacity: 0.55; }
body.focus-mode .sidebar-stats { display: none; }
body.focus-mode .focus-progress-bar { display: flex; }
body.focus-mode #focusModeBtn { background: var(--accent); color: white; }

#focusModeBtn.active { background: var(--accent); color: white; }

.img-missing {
  display: inline-block;
  max-width: 100%;
  margin: 6px 0;
  padding: 10px 14px;
  border: 1px dashed var(--bad);
  border-radius: 6px;
  background: rgba(166, 61, 64, 0.08);
  color: var(--bad);
  font-size: 13px;
  line-height: 1.4;
  word-break: break-all;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}
.img-missing::before {
  content: "⚠ ";
  font-family: inherit;
  margin-right: 4px;
}

/* ── Module switcher / family / vignette / import card ─────────────── */
.module-switcher {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  padding: 4px;
  background: rgba(140, 79, 34, 0.06);
  border-radius: 8px;
  margin-bottom: 8px;
}
.module-switcher button {
  flex: 1 1 auto;
  min-width: 70px;
  padding: 6px 10px;
  font-size: 13px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--muted, #6e5a4a);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
  white-space: nowrap;
}
.module-switcher button:hover { background: rgba(140, 79, 34, 0.1); }
.module-switcher button.active {
  background: var(--accent, #8c4f22);
  color: #fff;
  font-weight: 600;
}
.module-switcher button .module-count {
  display: inline-block;
  margin-left: 4px;
  padding: 0 5px;
  font-size: 11px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.25);
}
.module-switcher button:not(.active) .module-count { background: rgba(140, 79, 34, 0.12); }

.vignette-banner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 14px;
  margin-bottom: 12px;
  border-left: 3px solid var(--accent, #8c4f22);
  background: rgba(140, 79, 34, 0.06);
  border-radius: 4px;
}
.vignette-banner-text {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text, #2e2418);
}
.vignette-tag {
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--accent, #8c4f22);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.vignette-siblings { display: flex; flex-wrap: wrap; gap: 6px; }
.vignette-siblings button {
  padding: 4px 10px;
  font-size: 12px;
  border: 1px solid rgba(140, 79, 34, 0.3);
  border-radius: 14px;
  background: #fff;
  color: var(--accent, #8c4f22);
  cursor: pointer;
  font-weight: 500;
}
.vignette-siblings button:hover { background: rgba(140, 79, 34, 0.08); }
.vignette-siblings button.active {
  background: var(--accent, #8c4f22);
  color: #fff;
  border-color: var(--accent, #8c4f22);
}

.question-card.in-vignette {
  border-left: 3px solid var(--accent, #8c4f22);
}
.question-card.vignette-first { margin-top: 10px; }
.question-card.vignette-last { margin-bottom: 10px; }

.import-hint {
  padding: 10px 12px;
  margin-bottom: 10px;
  background: rgba(140, 79, 34, 0.04);
  border-radius: 6px;
  border-left: 3px solid rgba(140, 79, 34, 0.3);
}
.import-hint .hint-line { margin: 4px 0; line-height: 1.5; }
.import-hint code {
  padding: 2px 6px;
  background: rgba(140, 79, 34, 0.1);
  border-radius: 3px;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
}
.import-hint .family-list {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
  color: var(--text, #2e2418);
  background: rgba(255, 255, 255, 0.7);
  padding: 6px 8px;
  margin: 4px 0 8px;
  border-radius: 4px;
  word-break: break-word;
}
.module-hint-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}
.module-hint-chip {
  padding: 3px 8px;
  font-size: 11px;
  background: #fff;
  border: 1px solid rgba(140, 79, 34, 0.2);
  border-radius: 12px;
  color: var(--accent, #8c4f22);
  cursor: pointer;
}
.module-hint-chip:hover { background: rgba(140, 79, 34, 0.08); }
.module-hint-chip.system { font-weight: 600; }

.import-preview {
  padding: 8px 10px;
  margin: 8px 0;
  border-radius: 4px;
  min-height: 16px;
  line-height: 1.5;
  white-space: pre-wrap;
}
.import-preview.ok { background: rgba(90, 143, 61, 0.1); color: #3d6428; }
.import-preview.warn { background: rgba(220, 160, 60, 0.12); color: #8a5a18; }
.import-preview.error { background: rgba(166, 61, 64, 0.1); color: var(--bad, #a63d40); }

.module-manager-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.module-manager-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  background: rgba(140, 79, 34, 0.04);
  border-radius: 4px;
}
.module-manager-row .mm-name { font-weight: 500; }
.module-manager-row .mm-meta { font-size: 11px; color: var(--muted, #6e5a4a); }
.module-manager-row button { font-size: 12px; padding: 4px 8px; }
.module-family-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  margin-left: 16px;
  padding: 6px 10px;
  background: rgba(140, 79, 34, 0.02);
  border-left: 2px solid rgba(140, 79, 34, 0.15);
}
.module-family-row button { font-size: 12px; padding: 4px 8px; }

/* ── AI 提示词管理 ────────────────────────────────────────── */
.prompts-list { display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }
.prompts-group { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: var(--panel); }
.prompts-group-title { cursor: pointer; font-weight: 600; padding: 4px 0; }
.prompt-card { border-top: 1px dashed var(--line); padding: 10px 0; margin-top: 6px; }
.prompt-card:first-of-type { border-top: none; }
.prompt-card-head { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.prompt-badge { font-size: 11px; padding: 2px 6px; border-radius: 4px; background: rgba(0,0,0,0.05); color: var(--muted); }
.prompt-badge-edited { background: rgba(212, 145, 24, 0.15); color: #b87a04; }
.prompt-hint { font-size: 12px; color: #6b5a35; background: rgba(255, 235, 180, 0.35); padding: 6px 8px; border-radius: 6px; margin: 6px 0; }
.prompt-textarea { width: 100%; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 12px; line-height: 1.5; padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; resize: vertical; }
.prompt-status { margin-left: auto; }

/* ── 复习模式（重做） ──────────────────────────────────────── */
.redo-toggle-wrap { display: flex; align-items: center; gap: 6px; margin-left: 8px; }
.redo-toggle-wrap input { margin: 0; }
.redo-toggle-wrap label { font-size: 12px; color: var(--muted); cursor: pointer; }
.practice-workspace.redo-mode .redo-toggle-wrap label { color: var(--accent); font-weight: 600; }
.redo-compare-banner { margin: 8px 0; padding: 8px 12px; border-radius: 8px; font-size: 13px; }
.redo-compare-same { background: rgba(120, 180, 100, 0.18); color: #2c5e1a; border-left: 3px solid #4a8530; }
.redo-compare-improved { background: rgba(80, 170, 220, 0.18); color: #1c4d6b; border-left: 3px solid #2a86b8; }
.redo-compare-regressed { background: rgba(220, 100, 100, 0.18); color: #7c1f1f; border-left: 3px solid #b8362a; }
.redo-compare-first { background: rgba(180, 180, 180, 0.18); color: #555; border-left: 3px solid #888; }

/* ── Multi-user: user bar, bank selector, admin panel ───────────────────── */
.user-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0 10px;
  flex-wrap: wrap;
}
.user-bar .user-name {
  font-size: 13px;
  color: #5a5141;
  font-weight: 600;
}
.bank-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}
.bank-selector select {
  flex: 1;
  padding: 7px 9px;
  border: 1px solid rgba(200, 185, 160, 0.9);
  border-radius: 10px;
  font-size: 13px;
}
.admin-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.admin-form input,
.admin-form select {
  padding: 8px 10px;
  border: 1px solid rgba(200, 185, 160, 0.9);
  border-radius: 10px;
  font-size: 13px;
}
.user-list { display: flex; flex-direction: column; gap: 6px; }
.user-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid rgba(220, 205, 182, 0.7);
  border-radius: 10px;
  background: rgba(255, 253, 248, 0.7);
  font-size: 13px;
}
.user-row span:last-child { display: flex; gap: 6px; align-items: center; }
.user-row input {
  padding: 5px 7px;
  border: 1px solid rgba(200, 185, 160, 0.9);
  border-radius: 8px;
}

.bank-grant-panel {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed rgba(160, 130, 80, 0.6);
  border-radius: 12px;
  background: rgba(248, 243, 232, 0.8);
}
.bank-grant-checks {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0;
}
.bank-check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 14px;
  color: #4a4133;
}
.bank-check input { width: auto; }