/* student.css v9 — SAT Student Practice Interface
   Design ref: xiaosaas.com clean style
   5-Tab: Dashboard / Practice / Scores / Wrongs / Report */

:root {
  --primary: #4a6cf7;
  --primary-light: #e8eeff;
  --bg: #f0f2f5;
  --card: #ffffff;
  --correct: #67c23a;
  --correct-bg: #e8f9ed;
  --warning: #e6a23c;
  --warning-bg: #fef3c7;
  --wrong: #f56c6c;
  --wrong-bg: #ffeae9;
  --text: #303133;
  --text-secondary: #909399;
  --text-tertiary: #c0c4cc;
  --border: #e5e7eb;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --font:
    -apple-system, BlinkMacSystemFont, "SF Pro", "Segoe UI", system-ui,
    sans-serif;
  /* Aliases for student-exam-style.css compatibility */
  --accent: var(--primary);
  --text2: var(--text-secondary);
  --text3: var(--text-tertiary);
}

[data-theme="dark"] {
  --primary-light: #1e3a5f;
  --bg: #111827;
  --card: #1f2937;
  --text: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-tertiary: #6b7280;
  --border: #374151;
  --correct-bg: #064e2a;
  --warning-bg: #3b2e0e;
  --wrong-bg: #5c1a1a;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  --accent: var(--primary);
  --text2: var(--text-secondary);
  --text3: var(--text-tertiary);
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Top Bar ===== */
.top-bar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-bar h1 {
  font-size: 18px;
  font-weight: 600;
  white-space: nowrap;
}
.top-bar h1 span {
  color: var(--primary);
}

.top-logout-btn {
  padding: 5px 14px;
  /* 2026-08-08 用户: 退出不要红色 — 改中性白, 与"改密码"同级不抢眼 */
  background: #fff;
  color: #334155;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  opacity: 0.85;
  transition: opacity 0.2s;
}
.top-logout-btn:hover {
  opacity: 1;
}

.top-secondary-btn {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
.top-secondary-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tab-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.tab-btn {
  padding: 6px 14px;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
  white-space: nowrap;
}
.tab-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.tab-btn.active {
  background: var(--primary);
  color: #fff;
}

/* Tab-bar external link (e.g. Mistakes Book → mistakes.html). Visual parity
   with .tab-btn but routes via browser navigation, not student.js tab router. */
.tab-btn-link {
  padding: 6px 14px;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.tab-btn-link::after {
  content: " ↗";
  font-size: 11px;
  margin-left: 2px;
  opacity: 0.7;
}
.tab-btn-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.theme-toggle {
  position: fixed;
  bottom: 16px;
  left: 16px;
  z-index: 9999;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 13px;
}

/* ===== Tab Panels ===== */
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: flex;
}

.app-startup-loading {
  align-items: center;
  color: var(--text-secondary);
  display: flex;
  font-size: 15px;
  justify-content: center;
  min-height: 180px;
  padding: 32px;
  text-align: center;
  width: 100%;
}

.app-auth-pending {
  gap: 12px;
}

.app-auth-pending::before {
  animation: sat-auth-pending-spin 0.8s linear infinite;
  border: 3px solid rgba(108, 140, 255, 0.2);
  border-radius: 50%;
  border-top-color: var(--accent, #6c8cff);
  box-sizing: border-box;
  content: "";
  flex: 0 0 22px;
  height: 22px;
  width: 22px;
}

@keyframes sat-auth-pending-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-auth-pending::before {
    animation-duration: 1.8s;
  }
}

/* ===== Dashboard Tab ===== */
.dashboard-layout {
  flex-direction: column;
  padding: 24px;
  gap: 20px;
  overflow-y: auto;
  height: calc(100vh - 53px);
}

.dash-user-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding: 10px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.dash-user-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
}
.dash-logout-btn {
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text2);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.dash-logout-btn:hover {
  background: #e74c3c;
  color: #fff;
  border-color: #e74c3c;
}

.stat-cards {
  display: grid;
  /* 2026-08-04 撤正确率卡后 3 张卡, 用 auto-fit 自适应张数 */
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.stat-icon.blue {
  background: var(--primary-light);
  color: var(--primary);
}
.stat-icon.green {
  background: var(--correct-bg);
  color: var(--correct);
}
.stat-icon.orange {
  background: var(--warning-bg);
  color: var(--warning);
}
.stat-icon.red {
  background: var(--wrong-bg);
  color: var(--wrong);
}

.stat-info {
  flex: 1;
}
.stat-number {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}
.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.dash-section {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.dash-section h3 {
  font-size: 15px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.recent-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.recent-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}
.recent-item:hover {
  background: var(--bg);
}

.recent-source {
  font-weight: 500;
  flex: 1;
}
.recent-stat {
  font-size: 12px;
  color: var(--text-secondary);
}
.recent-date {
  font-size: 11px;
  color: var(--text-tertiary);
}

.exam-records-section {
  margin-top: 20px;
}

.exam-record-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}

.exam-record-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  background: var(--bg);
}

.exam-record-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  font-weight: 700;
}

.exam-record-date,
.exam-record-muted {
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
}

.exam-record-meta-line {
  margin: -5px 0 10px;
}

.exam-record-scores {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.exam-record-score {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  background: var(--card);
}

.exam-record-score span {
  display: block;
  color: var(--text-secondary);
  font-size: 11px;
}

.exam-record-score strong {
  display: block;
  margin-top: 3px;
  font-size: 15px;
}

.exam-record-score.total strong {
  color: var(--primary);
}

.exam-record-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.records-layout {
  padding: 22px;
  height: calc(100vh - 62px);
  overflow-y: auto;
}

.records-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 1280px;
  margin: 0 auto;
}

.records-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px 24px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.records-header h2 {
  margin: 0 0 5px;
  font-size: 22px;
}

.records-header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
}

.records-subnav,
.records-range {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.records-subnav {
  margin-left: auto;
}

.records-range {
  width: 100%;
}

.records-subnav-btn,
.records-range-btn {
  min-height: 34px;
  padding: 7px 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text-secondary);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.records-subnav-btn.active,
.records-range-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.records-sync-line {
  min-height: 20px;
  color: var(--text-secondary);
  font-size: 12px;
}

.records-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.records-day-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.records-day-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.records-day-summary {
  display: grid;
  grid-template-columns: minmax(82px, 1.2fr) minmax(92px, 1fr) repeat(4, minmax(68px, auto));
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style-position: inside;
}

.records-day-summary:hover {
  background: var(--surface-soft);
}

.records-day-name {
  font-size: 16px;
  font-weight: 800;
}

.records-day-date,
.records-day-metric {
  color: var(--text-secondary);
  font-size: 12px;
}

.records-day-metric {
  text-align: right;
  white-space: nowrap;
}

.records-day-body {
  padding: 4px 18px 18px;
  border-top: 1px solid var(--border);
}

.records-day-body h4 {
  margin: 14px 0 8px;
  font-size: 13px;
}

.records-detail-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.records-detail-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.5fr) minmax(180px, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 9px 11px;
  border-radius: 7px;
  background: var(--bg);
}

.records-set-open {
  width: 100%;
  border: 1px solid transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.records-set-open:hover,
.records-set-open:focus-visible {
  border-color: var(--primary);
  background: var(--surface-soft);
  outline: none;
}

.records-detail-title {
  min-width: 0;
  overflow: hidden;
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.records-detail-meta {
  color: var(--text-secondary);
  font-size: 12px;
}

.records-result {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
}

.records-result.correct {
  color: var(--correct);
}

.records-result.wrong {
  color: var(--wrong);
}

.records-empty {
  margin-top: 0;
}

.storage-warning-banner {
  position: fixed;
  z-index: 10050;
  right: 18px;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: min(520px, calc(100vw - 36px));
  padding: 12px 14px;
  border: 1px solid var(--warning);
  border-radius: 9px;
  background: var(--warning-bg);
  color: var(--text);
  box-shadow: 0 16px 40px rgba(28, 39, 64, 0.22);
}

.storage-warning-copy {
  font-size: 13px;
  line-height: 1.45;
}

.storage-warning-close {
  flex: 0 0 auto;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.assignment-section {
  margin-top: 20px;
}

.assignment-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

.assignment-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  background: var(--bg);
}

.assignment-card.completed {
  opacity: 0.82;
}

.assignment-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  font-weight: 700;
}

.assignment-status {
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 8px;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
}

.assignment-card.pending .assignment-status {
  border-color: rgba(37, 99, 235, 0.25);
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
}

.assignment-meta,
.assignment-empty {
  margin-top: 8px;
  color: var(--text-secondary);
  font-size: 12px;
}

.assignment-empty.error {
  color: var(--wrong);
}

.assignment-start-btn {
  margin-top: 12px;
  border: none;
  border-radius: 6px;
  padding: 8px 12px;
  background: var(--primary);
  color: white;
  cursor: pointer;
  font-weight: 700;
}

.assignment-start-btn:hover {
  filter: brightness(0.95);
}

.dash-bookmark-icon {
  color: #f4b000;
  font-size: 16px;
}

.weak-skills {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dash-focus-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.dash-focus-pill {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(108, 140, 255, 0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
}

.dash-focus-pill.subtle {
  background: rgba(16, 185, 129, 0.1);
  color: #0f766e;
}

.weak-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  font-size: 13px;
}

.weak-name {
  flex: 1;
}
.weak-rate {
  font-weight: 600;
}

.dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.dash-preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
}

/* 弹出卡近全屏 (用户 2026-08-04: 错题/收藏题/犹豫题卡尽量占据全屏) */
.dash-preview-shell {
  width: 100%;
  height: calc(100vh - 28px);
  height: calc(100dvh - 28px);
  max-height: none;
  overflow-y: auto;
  background: var(--bg);
  border-radius: 12px;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.28);
  padding: 18px 22px;
}

.dash-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.dash-preview-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.dash-preview-heading {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 8px;
}

.dash-preview-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.dash-preview-nav-btn {
  min-width: 72px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--primary);
  padding: 6px 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.dash-preview-nav-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.dash-preview-nav-count {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 700;
}

.dash-preview-close {
  border: none;
  background: var(--card);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
}

.exam-record-shell {
  width: 100%;
}

.exam-record-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--text-secondary);
  font-size: 13px;
}

.exam-record-summary span {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
}

.exam-record-summary-wide span {
  font-weight: 700;
}

.exam-record-section-block {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.exam-record-section-block > h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.exam-record-module {
  margin-top: 16px;
  overflow-x: auto;
}

.exam-record-module h3 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 16px;
}

.exam-record-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.exam-record-table th,
.exam-record-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
}

.exam-record-table th {
  color: var(--text-secondary);
  font-weight: 700;
  background: var(--bg);
}

.exam-record-table tr:last-child td {
  border-bottom: none;
}

.exam-record-row.exam-record-correct td:nth-child(10) {
  color: var(--correct);
  font-weight: 700;
}

.exam-record-row.exam-record-wrong td:nth-child(10) {
  color: var(--wrong);
  font-weight: 700;
}

.exam-record-row.exam-record-blank td:nth-child(10) {
  color: var(--text-tertiary);
}

.exam-record-empty {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-tertiary);
  background: var(--card);
}

/* ===== Practice Tab (Three Column) ===== */
.practice-layout {
  height: calc(100vh - 53px);
  gap: 0;
}

/* ===== Score Overview Tab ===== */
.score-layout {
  flex-direction: column;
  padding: 24px;
  gap: 24px;
  overflow-y: auto;
  height: calc(100vh - 53px);
}

.score-top {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.score-ring-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.ring-svg {
  width: 160px;
  height: 160px;
}
.ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 12;
}
.ring-fill {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s;
}
.ring-fill.correct-ring {
  stroke: var(--correct);
}
.ring-fill.wrong-ring {
  stroke: var(--wrong);
}

.ring-center-text {
  font-size: 32px;
  font-weight: 700;
  fill: var(--text);
}
.ring-sub-text {
  font-size: 14px;
  fill: var(--text-secondary);
}

.score-detail {
  text-align: center;
}
.score-detail .big {
  font-size: 28px;
  font-weight: 700;
}
.score-detail .label {
  font-size: 12px;
  color: var(--text-secondary);
}

.score-breakdown {
  flex: 1;
  min-width: 300px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.score-breakdown h3 {
  font-size: 15px;
  margin-bottom: 16px;
}

.skill-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 13px;
}

.skill-name {
  width: 160px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.skill-bar-bg {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s;
}
.skill-bar-fill.good {
  background: var(--correct);
}
.skill-bar-fill.fair {
  background: var(--warning);
}
.skill-bar-fill.weak {
  background: var(--wrong);
}

.skill-pct {
  width: 40px;
  text-align: right;
  font-weight: 600;
}

.skill-grade {
  width: 48px;
  text-align: center;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.grade-good {
  background: var(--correct-bg);
  color: var(--correct);
}
.grade-fair {
  background: var(--warning-bg);
  color: #92400e;
}
.grade-weak {
  background: var(--wrong-bg);
  color: var(--wrong);
}

[data-theme="dark"] .grade-fair {
  color: var(--warning);
}

/* ===== Wrong Answers Tab + Bookmarks (shared row/table styles) ===== */
.bookmarks-layout,
.wrong-layout {
  flex-direction: column;
  padding: 24px;
  gap: 16px;
  overflow-y: auto;
  height: calc(100vh - 53px);
}

.wrong-header {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.wrong-subnav {
  align-self: flex-start;
  margin-left: 0;
}

.exam-record-too-fast,
.exam-detail-too-fast {
  color: var(--wrong) !important;
  font-weight: 800;
}

.exam-record-fast,
.exam-detail-fast {
  color: var(--warning) !important;
  font-weight: 700;
}

.wrong-count {
  font-size: 16px;
  font-weight: 600;
}

.wrong-search {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  min-width: 200px;
}
.wrong-search::placeholder {
  color: var(--text-secondary);
}
.wrong-filter {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  font-size: 13px;
}

.wrong-table-wrap {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.wrong-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.wrong-table th {
  text-align: left;
  padding: 12px 16px;
  background: var(--bg);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.wrong-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.wrong-table tr:nth-child(even) td {
  background: rgba(0, 0, 0, 0.02);
}
[data-theme="dark"] .wrong-table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

.wrong-table tr:hover td {
  background: var(--primary-light);
}

.wrong-table td:last-child {
  text-align: right;
}

.tri-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
}
.tri-icon.tri-blue {
  background: var(--primary-light);
  color: var(--primary);
}
.tri-icon.tri-green {
  background: var(--correct-bg);
  color: var(--correct);
}
.tri-icon.tri-red {
  background: var(--wrong-bg);
  color: var(--wrong);
}

.wrong-detail-btn {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--card);
  color: var(--primary);
  font-size: 12px;
  cursor: pointer;
}
.wrong-detail-btn:hover {
  background: var(--primary-light);
}
.wrong-practice-btn {
  padding: 4px 10px;
  border: 1px solid var(--primary);
  border-radius: 4px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  cursor: pointer;
}
.wrong-practice-btn:hover {
  opacity: 0.85;
}

.bookmark-remove-btn {
  margin-left: 8px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--card);
  color: var(--wrong);
  font-size: 12px;
  cursor: pointer;
}

.bookmark-remove-btn:hover {
  background: var(--wrong-bg);
}

/* Wrong card (detail view) */
.wrong-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  border-left: 4px solid var(--wrong);
  margin-bottom: 12px;
}
.wrong-card-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.wrong-left {
  border-right: 1px solid var(--border);
  padding-right: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
}
.wrong-passage {
  white-space: pre-line;
}
/* Override the global anti-copy `user-select: none` that tracker-beacon.js
   injects on body. Wrong/Full Review carousel cards need to support text
   selection so students can highlight + add notes during review.
   Limited to passage with data-allow-highlight=1 to keep anti-copy on
   choices/explanation text. */
.wrong-passage[data-allow-highlight="1"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
  cursor: text;
}
/* 题干+选项区划词查词 (lookup-only): 只放开这两块的文本选择,
   解析文本继续保持防复制 */
.wrong-right[data-allow-highlight="1"] .wrong-q-text,
.wrong-right[data-allow-highlight="1"] .wrong-choices {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
  cursor: text;
}
.wrong-img {
  max-width: 100%;
  margin-top: 10px;
  border-radius: 4px;
}
.wrong-right {
  font-size: 13px;
}
.wrong-explanation {
  margin-top: 12px;
  padding: 10px;
  background: var(--bg);
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text2);
}
@media (max-width: 768px) {
  .wrong-card-body {
    grid-template-columns: 1fr;
  }
  .wrong-left {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-right: 0;
    padding-bottom: 12px;
    margin-bottom: 12px;
  }
}

.wrong-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.wrong-card-title {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 12px;
}

.wrong-card-derived-type {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
}

.wrong-bookmark-btn {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--card);
  color: var(--text-secondary);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

.wrong-bookmark-btn:hover,
.wrong-bookmark-btn.active {
  border-color: #f4b000;
  background: rgba(244, 176, 0, 0.12);
  color: #b77900;
}

.wrong-q-text {
  font-weight: 500;
  margin-bottom: 8px;
  font-size: 13px;
}

.wrong-choices {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
}

.wrong-choice {
  padding: 4px 8px;
  border-radius: 4px;
}
.wrong-choice.user-wrong {
  background: var(--wrong-bg);
}
.wrong-choice.is-correct {
  background: var(--correct-bg);
  font-weight: 600;
}

/* ===== Report Tab ===== */
.report-layout {
  flex-direction: column;
  padding: 24px;
  gap: 20px;
  overflow-y: auto;
  height: calc(100vh - 53px);
}

.report-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.report-card h3 {
  font-size: 15px;
  margin-bottom: 16px;
}

.password-input {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.password-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.45);
}
.password-modal {
  width: min(380px, 100%);
  border-radius: 8px;
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 20px;
}
.password-modal h3 {
  margin-bottom: 14px;
  font-size: 16px;
}
.identity-modal-copy {
  margin: 0 0 12px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.5;
}
.password-input {
  width: 100%;
  margin-bottom: 10px;
  padding: 9px 10px;
}
.password-message {
  min-height: 18px;
  margin: 4px 0 12px;
  color: var(--text-secondary);
  font-size: 12px;
}
.password-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.password-action {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  padding: 7px 12px;
  cursor: pointer;
}
.password-action.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}
.password-modal .password-actions > .password-action:not(.primary) {
  border-color: #cbd5e1;
  background: #fff;
  color: #17252e;
}
.password-modal .password-actions > .password-action:not(.primary):hover {
  border-color: #94a3b8;
  background: #f8fafc;
}

.trend-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 160px;
  padding-top: 8px;
}

.trend-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  height: 100%;
  justify-content: flex-end;
}

.trend-bar {
  width: 100%;
  max-width: 40px;
  border-radius: 4px 4px 0 0;
  transition: height 0.5s;
}

.trend-bar-label {
  font-size: 10px;
  color: var(--text-tertiary);
}
.trend-bar-val {
  font-size: 10px;
  font-weight: 600;
}

.skill-progress-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.skill-progress-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}

.sp-name {
  width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sp-bar-bg {
  flex: 1;
  height: 10px;
  background: var(--border);
  border-radius: 5px;
  overflow: hidden;
}
.sp-bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.6s;
}
.sp-count {
  width: 60px;
  text-align: right;
  font-size: 12px;
  color: var(--text-secondary);
}
.sp-rate {
  width: 48px;
  text-align: right;
  font-weight: 600;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-secondary);
}
.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
}
.empty-state h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text);
}
.empty-state p {
  font-size: 13px;
}

/* ===== Exam Mode Embedded Overrides ===== */
#examApp .exam-topbar {
  top: 0;
}
#examApp .exam-passage-pane {
  max-height: calc(100vh - 200px);
}
#examApp .exam-question-pane {
  max-height: calc(100vh - 200px);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .practice-layout {
    flex-direction: column;
    height: auto;
  }
  .score-top {
    flex-direction: column;
  }
  .top-bar {
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 16px;
  }
  .tab-nav {
    margin-left: 0;
    order: 10;
    width: 100%;
    overflow-x: auto;
  }
  .stat-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .dash-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .top-bar h1 {
    font-size: 15px;
  }
  .stat-cards {
    grid-template-columns: 1fr;
  }
  .dash-preview-overlay {
    padding: 12px;
  }
  .dash-preview-shell {
    padding: 12px;
  }
}

/* ===== Modules Tab ===== */
.modules-layout.active {
  display: block;
  padding: 20px;
  overflow-y: auto;
}

.mod-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}
.mod-header h2 {
  margin: 0;
  color: var(--text);
}
.mod-total {
  color: var(--text2);
  font-size: 14px;
}

.mod-group {
  margin-bottom: 28px;
}
.mod-group-title {
  color: var(--text2);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.mod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.mod-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition:
    box-shadow 0.15s,
    border-color 0.15s;
}
.mod-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.mod-card-name {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  font-size: 14px;
}
.mod-card-count {
  color: var(--text2);
  font-size: 12px;
  margin-bottom: 8px;
}

.mod-diff-bar {
  display: flex;
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  background: var(--border);
  margin-bottom: 6px;
}
.mod-diff-seg {
  height: 100%;
  transition: width 0.3s;
}
.mod-diff-seg.easy {
  background: var(--correct);
}
.mod-diff-seg.medium {
  background: var(--warning);
}
.mod-diff-seg.hard {
  background: var(--wrong);
}
.mod-diff-seg.killer {
  background: #dc2626;
}

.mod-card-legend {
  display: flex;
  gap: 8px;
  font-size: 11px;
}
.mod-legend-item {
  color: var(--text3);
}
.mod-legend-item.easy {
  color: var(--correct);
}
.mod-legend-item.medium {
  color: var(--warning);
}
.mod-legend-item.hard {
  color: var(--wrong);
}
.mod-legend-item.killer {
  color: #dc2626;
}

.mod-card-coverage {
  color: var(--text3);
  font-size: 11px;
  margin-top: 4px;
}

/* Module list view */
.mod-list-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.mod-list-header h2 {
  margin: 0;
  color: var(--text);
}
.mod-list-count {
  color: var(--text2);
  font-size: 13px;
}

.mod-back-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  cursor: pointer;
  color: var(--text);
  font-size: 13px;
}
.mod-back-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mod-filters {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}
.mod-filter-select,
.mod-filter-input {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  color: var(--text);
  font-size: 13px;
}
.mod-filter-input {
  flex: 1;
  max-width: 260px;
}
.mod-filter-select:focus,
.mod-filter-input:focus {
  outline: none;
  border-color: var(--primary);
}

.mod-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}
.mod-chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
}
.mod-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.mod-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Question cards */
.mod-question-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mod-q-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
/* Split layout: left passage + right question (SAT style) */
.mod-q-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 16px;
}
.mod-q-split .mod-q-header {
  grid-column: 1 / -1;
}
.mod-q-split .mod-q-left {
  max-height: 70vh;
  overflow-y: auto;
  border-right: 2px solid var(--border);
  padding-right: 14px;
}
.mod-q-split .mod-q-left .mod-q-passage {
  margin-bottom: 0;
}
.mod-q-split .mod-q-right {
  display: flex;
  flex-direction: column;
}
@media (max-width: 768px) {
  .mod-q-split {
    grid-template-columns: 1fr;
  }
  .mod-q-split .mod-q-left {
    border-right: none;
    padding-right: 0;
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
    max-height: 40vh;
  }
}

.mod-q-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.mod-q-num {
  font-weight: 700;
  color: var(--text3);
  font-size: 12px;
}

.mod-diff-badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.mod-diff-badge.easy {
  background: var(--correct-bg);
  color: var(--correct);
}
.mod-diff-badge.medium {
  background: var(--warning-bg);
  color: var(--warning);
}
.mod-diff-badge.hard {
  background: var(--wrong-bg);
  color: var(--wrong);
}
.mod-diff-badge.killer {
  background: #fecaca;
  color: #dc2626;
  font-weight: 700;
}

.mod-q-skill {
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
}
.mod-q-topic {
  color: var(--text3);
  font-size: 12px;
}

.mod-conf {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 8px;
  font-weight: 600;
}
.mod-conf.high {
  background: var(--correct-bg);
  color: var(--correct);
}
.mod-conf.med {
  background: var(--warning-bg);
  color: var(--warning);
}
.mod-conf.low {
  background: var(--wrong-bg);
  color: var(--wrong);
}

.mod-q-text {
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 6px;
}

.mod-q-passage {
  color: var(--text2);
  font-size: 13px;
  line-height: 1.5;
  background: var(--bg);
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 8px;
  position: relative;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Show Answer / Hide Answer button */
.mod-reveal-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 5px 14px;
  font-size: 12px;
  cursor: pointer;
  margin-top: 6px;
  margin-bottom: 6px;
}
.mod-reveal-btn:hover {
  opacity: 0.85;
}

/* Choices — ALWAYS visible */
.mod-q-choices {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mod-q-choice {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text);
  border: 1px solid transparent;
  transition: all 0.2s;
}
.mod-q-choice:not(.correct) {
  cursor: pointer;
}
.mod-q-choice:not(.correct):hover {
  background: var(--bg);
  border-color: var(--border);
}

/* Correct answer — hidden until .revealed */
.mod-q-choice.correct {
  background: transparent;
  border-color: transparent;
}
.mod-q-choices.revealed .mod-q-choice.correct {
  background: var(--correct-bg);
  border-color: var(--correct);
}

/* Choice labels */
.mod-q-choice-label {
  font-weight: 700;
  min-width: 18px;
  color: var(--text-secondary);
}
.mod-q-choices.revealed .mod-q-choice.correct .mod-q-choice-label {
  color: var(--correct);
}

/* Eliminated choices — strikethrough */
.mod-q-choice.eliminated {
  opacity: 0.45;
  position: relative;
}
.mod-q-choice.eliminated .mod-q-choice-text {
  text-decoration: line-through;
  text-decoration-color: var(--wrong);
  text-decoration-thickness: 2px;
}
.mod-q-choice.eliminated .mod-q-choice-label::after {
  content: "×";
  color: var(--wrong);
  font-size: 16px;
  margin-left: 2px;
}

/* Passage line highlighting */
.mod-passage-line {
  display: inline;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.15s;
}
.mod-passage-line:hover {
  background: rgba(74, 108, 247, 0.08);
}
.mod-passage-line.highlighted {
  background: #fff3bf;
  box-shadow: 0 1px 0 #f0d060;
}
[data-theme="dark"] .mod-passage-line.highlighted {
  background: rgba(255, 213, 0, 0.2);
  box-shadow: 0 1px 0 rgba(255, 213, 0, 0.3);
}
.mod-passage-collapse {
  display: block;
  text-align: center;
  font-size: 12px;
  color: var(--primary);
  cursor: pointer;
  padding: 4px;
  margin-top: 4px;
  font-weight: 600;
}
.mod-passage-collapse:hover {
  opacity: 0.7;
}

.mod-q-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}
.mod-tag {
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
}

.mod-q-rationale {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text2);
}
.mod-q-rationale summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 600;
}
.mod-q-rationale p {
  margin: 6px 0 0;
  line-height: 1.5;
}

.mod-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  padding: 12px 0;
}
.mod-page-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 16px;
  cursor: pointer;
  color: var(--text);
  font-size: 13px;
}
.mod-page-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}
.mod-page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.mod-page-info {
  color: var(--text2);
  font-size: 13px;
}

/* Timer bar */
.mod-timer-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.mod-timer-display {
  font-family: "Courier New", monospace;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  min-width: 90px;
}
.mod-timer-display.warning {
  color: var(--warning);
}
.mod-timer-display.expired {
  color: var(--wrong);
  animation: timer-blink 1s infinite;
}
@keyframes timer-blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}
.mod-timer-btn {
  padding: 4px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card-bg);
  color: var(--text1);
  cursor: pointer;
  font-size: 13px;
}
.mod-timer-btn.start {
  border-color: var(--accent);
  color: var(--accent);
}
.mod-timer-btn:hover {
  background: var(--hover-bg);
}
.mod-timer-label {
  color: var(--text3);
  font-size: 12px;
  margin-left: auto;
}

.mod-error {
  color: var(--wrong);
  padding: 40px;
  text-align: center;
  font-size: 16px;
}

@media (max-width: 640px) {
  .mod-grid {
    grid-template-columns: 1fr;
  }
  .mod-filters {
    flex-direction: column;
  }
  .mod-filter-input {
    max-width: 100%;
  }
}

/* ===== Error Book Tab ===== */
.errorbook-layout {
  flex-direction: column;
  padding: 20px;
  max-width: 960px;
  margin: 0 auto;
  overflow-y: auto;
}

/* ===== Adaptive Practice Tab ===== */
.adaptive-layout.active {
  display: block;
  padding: 0;
  overflow-y: auto;
}

.eb-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}
.eb-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}
.eb-total {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Global stats */
.eb-global-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
.eb-stat-section {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
}
.eb-stat-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

/* Bar chart rows (shared) */
.eb-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
}
.eb-bar-label {
  min-width: 130px;
  font-size: 0.82rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}
.eb-bar-track {
  flex: 1;
  height: 8px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
}
.eb-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s;
}
.eb-bar-num {
  min-width: 30px;
  text-align: right;
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.eb-practice-link {
  padding: 2px 8px;
  border: 1px solid var(--primary);
  border-radius: 3px;
  background: transparent;
  color: var(--primary);
  font-size: 0.75rem;
  cursor: pointer;
  white-space: nowrap;
}
.eb-practice-link:hover {
  background: var(--primary);
  color: #fff;
}

/* Elimination grid */
.eb-elim-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 10px;
  margin: 8px 0;
}
.eb-elim-card {
  text-align: center;
  padding: 12px 8px;
  border-radius: 10px;
  background: var(--bg);
}
.eb-elim-num {
  font-size: 1.4rem;
  font-weight: 700;
}
.eb-elim-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Student cards grid */
.eb-student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.eb-student-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
.eb-student-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.eb-card-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.eb-card-count {
  font-size: 0.9rem;
  color: var(--wrong);
  font-weight: 600;
}
.eb-card-top-module {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 6px;
}
.eb-card-date {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* Detail view */
.eb-search-row {
  margin-bottom: 12px;
}
.eb-search {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  width: 100%;
  max-width: 400px;
  box-sizing: border-box;
}
.eb-search::placeholder {
  color: var(--text-secondary);
}
.eb-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.eb-detail-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
}
.eb-detail-count {
  font-size: 0.85rem;
  color: var(--wrong);
  font-weight: 600;
}
.eb-back-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  cursor: pointer;
  color: var(--text);
  font-size: 0.85rem;
}
.eb-back-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Sections */
.eb-section {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 16px;
  margin-bottom: 16px;
}
.eb-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.eb-section-icon {
  font-size: 1.1rem;
}

/* Error cards */
.eb-error-card {
  background: var(--bg);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 12px;
  border-left: 3px solid var(--border);
}
.eb-error-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.eb-error-date {
  font-size: 0.78rem;
  color: var(--text-tertiary);
}
.eb-error-module {
  font-size: 0.75rem;
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}
.eb-error-conf {
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 8px;
  font-weight: 500;
}
.eb-conf-high {
  background: var(--correct-bg);
  color: var(--correct);
}
.eb-conf-medium {
  background: var(--warning-bg);
  color: var(--warning);
}
.eb-conf-low {
  background: var(--wrong-bg);
  color: var(--wrong);
}

.eb-error-question {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 8px;
}
.eb-error-answers {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
  font-size: 0.85rem;
}
.eb-answer-label {
  color: var(--text-secondary);
}
.eb-answer-wrong {
  color: var(--wrong);
  font-weight: 600;
}
.eb-answer-correct {
  color: var(--correct);
  font-weight: 600;
}

.eb-error-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.eb-pill {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid;
  background: transparent;
}

.eb-error-detail {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 6px;
}
.eb-error-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--warning);
  background: var(--warning-bg);
  padding: 8px 10px;
  border-radius: 6px;
  margin-top: 6px;
}
.eb-note-icon {
  font-size: 0.9rem;
}
.eb-error-link {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 6px;
}

/* Empty state */
.eb-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.eb-empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}
.eb-empty h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--text);
}
.eb-empty p {
  font-size: 0.88rem;
  max-width: 360px;
  margin: 0 auto;
  line-height: 1.5;
}
.eb-empty-hint {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  padding: 8px 0;
}

@media (max-width: 640px) {
  .eb-global-stats {
    grid-template-columns: 1fr;
  }
  .eb-student-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Theme + Wallpaper Picker ===== */
.theme-wp-container {
  position: fixed;
  bottom: 16px;
  left: 16px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 6px;
}
/* 收进学生顶栏时 (theme.js 检测 .top-bar): 跟随文档流, 位于字号控件右侧,
   不再 fixed 左下角挡住考试单题计时 (2026-08-04 用户反馈) */
.top-bar .theme-wp-container {
  position: static;
  bottom: auto;
  left: auto;
  z-index: auto;
  transform: none;
}
.theme-switcher {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.theme-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0;
}
.theme-btn:hover {
  transform: scale(1.15);
}
.theme-btn.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(74, 108, 247, 0.2);
}
.theme-btn[data-t="light"] {
  background: #ffffff;
  border-color: #ddd;
}
.theme-btn[data-t="dark"] {
  background: #1a1d27;
  border-color: #444;
}
.theme-btn[data-t="eye"] {
  background: #c8ceaa;
  border-color: #a8ae8a;
}

.wp-toggle-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.wp-toggle-btn:hover {
  transform: scale(1.1);
}
.wp-panel {
  position: absolute;
  bottom: 42px;
  right: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  padding: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  min-width: 200px;
}
.wp-btn {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.wp-btn:hover {
  transform: scale(1.15);
}
.wp-btn.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(74, 108, 247, 0.2);
}

/* Skeleton loading screens */
@keyframes ll-shimmer {
  0% {
    background-position: -400px 0;
  }
  100% {
    background-position: 400px 0;
  }
}
.ll-skeleton {
  padding: 24px;
}
.ll-loading-status {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0 0 16px;
  text-align: center;
}
.ll-skel-card {
  background: var(--card);
  border-radius: var(--radius, 8px);
  padding: 16px;
  margin-bottom: 12px;
}
.ll-skel-bar {
  background: linear-gradient(
    90deg,
    var(--bg, #f0f2f5) 25%,
    var(--card, #e8e8e8) 50%,
    var(--bg, #f0f2f5) 75%
  );
  background-size: 800px 100%;
  animation: ll-shimmer 1.5s infinite linear;
  border-radius: 4px;
}
.ll-skel-heading {
  height: 24px;
  width: 200px;
  margin-bottom: 16px;
}
.ll-skel-title {
  height: 16px;
  width: 60%;
  margin-bottom: 10px;
}
.ll-skel-text {
  height: 12px;
  width: 90%;
  margin-bottom: 8px;
}
.ll-skel-text.short {
  width: 40%;
}

/* ===== Data Management Panel ===== */
.dm-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  font-size: 13px;
}
.dm-stat-row.dm-stat-sub {
  padding-left: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}
.dm-stat-label {
  color: var(--text-secondary);
}
.dm-stat-value {
  font-weight: 600;
  color: var(--text);
}
.dm-breakdown {
  border-top: 1px solid var(--border);
  margin: 8px 0;
  padding-top: 6px;
}
.dm-btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.dm-btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
}
.dm-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}
.dm-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.dm-btn-accent {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.dm-btn-accent:hover:not(:disabled) {
  opacity: 0.85;
  color: #fff;
}
.dm-danger-row {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.dm-btn-danger {
  background: transparent;
  color: var(--wrong);
  border-color: var(--wrong);
}
.dm-btn-danger:hover:not(:disabled) {
  background: var(--wrong);
  color: #fff;
  border-color: var(--wrong);
}
.dm-offline-badge {
  text-align: center;
  padding: 8px;
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 600;
  color: var(--correct);
  background: var(--correct-bg);
  margin-top: 12px;
}
.dm-offline-badge.offline {
  color: var(--warning);
  background: var(--warning-bg);
}

.guest-tab-locked::after {
  content: " 🔒";
  font-size: 10px;
  color: var(--text-secondary);
}

.guest-lock,
.exam-preview-lock {
  border: 1px solid rgba(255, 193, 7, 0.32);
  background: rgba(255, 193, 7, 0.08);
  border-radius: 8px;
  padding: 18px;
  margin: 16px 0;
  color: var(--text);
}

.guest-lock {
  max-width: 560px;
  margin: 48px auto;
  text-align: center;
}

.guest-lock-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.guest-lock h3 {
  margin: 0 0 8px;
}

.guest-lock p,
.exam-preview-lock-title {
  color: var(--text-secondary);
  line-height: 1.55;
}

.guest-lock-btn,
.exam-preview-lock .exam-btn {
  margin-top: 12px;
}

.exam-preview-lock.compact {
  margin: 12px 0 18px;
}

.exam-card.preview-only {
  cursor: pointer;
}

.exam-card-lock {
  margin-top: 8px;
  color: var(--warning);
  font-size: 12px;
  font-weight: 700;
}

.exam-start-btn.locked {
  background: var(--warning);
}

/* === Design pass 2026-06-01: learning control surface === */
:root {
  --primary: #2f5fd0;
  --primary-light: #e9f0ff;
  --bg: #eef2f4;
  --card: #ffffff;
  --correct: #168a62;
  --correct-bg: #e4f6ef;
  --warning: #b7791f;
  --warning-bg: #fff1d6;
  --wrong: #c84646;
  --wrong-bg: #fde8e4;
  --text: #172033;
  --text-secondary: #667085;
  --text-tertiary: #98a2b3;
  --border: #d8dee8;
  --shadow: 0 10px 30px rgba(28, 39, 64, 0.08);
  --radius: 8px;
  --surface-raised: rgba(255, 255, 255, 0.82);
  --surface-soft: rgba(47, 95, 208, 0.06);
  --focus-ring: rgba(47, 95, 208, 0.28);
  --success-soft: rgba(22, 138, 98, 0.12);
  --danger-soft: rgba(200, 70, 70, 0.12);
}

[data-theme="dark"] {
  --primary: #7aa2ff;
  --primary-light: #17284f;
  --bg: #0f141d;
  --card: #171f2b;
  --correct: #50c896;
  --correct-bg: #0f382b;
  --warning: #e4b75f;
  --warning-bg: #3b2b12;
  --wrong: #ef8175;
  --wrong-bg: #421b1b;
  --text: #eef3fb;
  --text-secondary: #a8b3c5;
  --text-tertiary: #748096;
  --border: #2d394b;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
  --surface-raised: rgba(23, 31, 43, 0.9);
  --surface-soft: rgba(122, 162, 255, 0.09);
  --focus-ring: rgba(122, 162, 255, 0.32);
  --success-soft: rgba(80, 200, 150, 0.12);
  --danger-soft: rgba(239, 129, 117, 0.14);
}

body {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(255, 255, 255, 0) 260px),
    repeating-linear-gradient(
      90deg,
      rgba(47, 95, 208, 0.035) 0,
      rgba(47, 95, 208, 0.035) 1px,
      transparent 1px,
      transparent 48px
    ),
    var(--bg);
}

[data-theme="dark"] body,
body[data-theme="dark"] {
  background:
    linear-gradient(180deg, rgba(122, 162, 255, 0.08), rgba(122, 162, 255, 0) 280px),
    repeating-linear-gradient(
      90deg,
      rgba(122, 162, 255, 0.045) 0,
      rgba(122, 162, 255, 0.045) 1px,
      transparent 1px,
      transparent 48px
    ),
    var(--bg);
}

.top-bar {
  min-height: 62px;
  border-bottom: 1px solid rgba(23, 32, 51, 0.08);
  box-shadow: 0 8px 28px rgba(28, 39, 64, 0.08);
}

.top-bar h1 {
  letter-spacing: 0;
  font-weight: 800;
}

.tab-nav {
  align-items: center;
  gap: 6px;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.tab-btn,
.tab-btn-link,
.top-secondary-btn,
.top-logout-btn,
.dash-logout-btn,
.assignment-start-btn,
.dash-preview-nav-btn {
  min-height: 36px;
  border-radius: 8px;
  font-weight: 700;
}

.tab-btn,
.tab-btn-link {
  border: 1px solid transparent;
  scroll-snap-align: start;
}

.tab-btn:hover,
.tab-btn-link:hover {
  border-color: rgba(47, 95, 208, 0.22);
}

.tab-btn.active {
  box-shadow: 0 8px 18px rgba(47, 95, 208, 0.22);
}

.dashboard-layout,
.records-layout,
.score-layout,
.bookmarks-layout,
.wrong-layout,
.errors-layout,
.adaptive-layout,
.vocab-layout {
  padding: 22px;
  height: calc(100vh - 62px);
}

.stat-cards {
  grid-template-columns: repeat(4, minmax(160px, 1fr));
}

.stat-card,
.dash-section,
.score-ring-card,
.score-breakdown,
.wrong-table-wrap,
.exam-record-card,
.assignment-card,
.dash-user-bar {
  border: 1px solid rgba(216, 222, 232, 0.9);
  box-shadow: var(--shadow);
}

.stat-card {
  min-height: 104px;
  align-items: stretch;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--primary);
}

.stat-icon {
  border-radius: 8px;
}

.stat-number {
  font-size: 28px;
  letter-spacing: 0;
}

.dash-section h3,
.score-breakdown h3,
.wrong-header h2,
.errors-header h2,
.adaptive-header h2,
.vocab-header h2 {
  letter-spacing: 0;
}

.dash-focus-pill,
.assignment-status,
.exam-record-summary span {
  border-radius: 8px;
}

.assignment-status {
  background: var(--surface-soft);
  letter-spacing: 0;
}

.assignment-card.completed .assignment-status {
  border-color: rgba(22, 138, 98, 0.24);
  color: var(--correct);
  background: var(--success-soft);
}

.assignment-empty,
.exam-record-empty,
.empty-state {
  border-color: rgba(216, 222, 232, 0.9);
  background: var(--surface-raised);
}

.assignment-empty.error {
  border-left: 4px solid var(--wrong);
  padding-left: 10px;
  background: var(--danger-soft);
}

.recent-item,
.weak-item,
.assignment-card,
.exam-record-card {
  transition:
    transform 0.15s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
}

.recent-item:hover,
.assignment-card:hover,
.exam-record-card:hover {
  transform: translateY(-1px);
  border-color: rgba(47, 95, 208, 0.24);
  box-shadow: 0 12px 28px rgba(28, 39, 64, 0.1);
}

.wrong-table th,
.exam-record-table th {
  background: rgba(47, 95, 208, 0.06);
  color: var(--text);
  font-weight: 800;
}

.wrong-table td,
.wrong-table th,
.exam-record-table td,
.exam-record-table th {
  padding: 12px 14px;
}

.theme-toggle {
  border-radius: 8px;
  box-shadow: var(--shadow);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

button:disabled,
.assignment-start-btn:disabled,
.dash-preview-nav-btn:disabled {
  cursor: not-allowed;
  filter: saturate(0.75);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 980px) {
  .top-bar {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 10px;
  }
  .tab-nav {
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .stat-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .dash-grid {
    grid-template-columns: 1fr;
  }
  .records-day-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .records-day-name,
  .records-day-date {
    grid-column: span 1;
  }
  .records-detail-row {
    grid-template-columns: 1fr auto;
  }
  .records-detail-meta {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

@media (max-width: 560px) {
  .dashboard-layout,
  .records-layout,
  .score-layout,
  .bookmarks-layout,
  .wrong-layout,
  .errors-layout,
  .adaptive-layout,
  .vocab-layout {
    padding: 14px;
  }
  .records-header {
    align-items: stretch;
    padding: 15px;
  }
  .records-subnav {
    width: 100%;
    margin-left: 0;
  }
  .records-subnav-btn {
    flex: 1 1 0;
  }
  .records-day-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 13px;
  }
  .records-day-metric {
    text-align: left;
  }
  .records-detail-row {
    grid-template-columns: 1fr;
  }
  .records-detail-meta,
  .records-result {
    grid-column: 1;
    grid-row: auto;
  }
  .stat-cards {
    grid-template-columns: 1fr;
  }
  .stat-card {
    min-height: 92px;
  }
  .theme-toggle,
  .theme-wp-container {
    display: none;
  }
}

/* ===== 教师端：名单先行的单人档案 ===== */
.teacher-roster-shell {
  width: 100%;
  min-height: 100%;
  padding: 22px;
  color: var(--text);
}

.teacher-roster-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  box-shadow: 0 10px 28px rgba(28, 39, 64, 0.08);
}

.teacher-roster-header h2,
.teacher-assessment-summary h3,
.teacher-assignment-action h4 {
  margin: 0;
}

.teacher-roster-header p {
  max-width: 760px;
  margin: 7px 0 0;
  line-height: 1.65;
}

.teacher-roster-eyebrow,
.teacher-assessment-eyebrow {
  margin-bottom: 5px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.teacher-roster-list {
  display: grid;
  gap: 10px;
}

.teacher-roster-card {
  display: grid;
  grid-template-columns: minmax(190px, 0.8fr) minmax(300px, 1.5fr) auto;
  align-items: center;
  gap: 18px;
  padding: 15px 18px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 9px;
  background: var(--card);
  box-shadow: 0 7px 22px rgba(28, 39, 64, 0.06);
}

.teacher-roster-identity {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  min-width: 0;
}

.teacher-roster-name {
  overflow: hidden;
  max-width: 100%;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.teacher-roster-metrics {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex-wrap: wrap;
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.teacher-roster-metrics > span {
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--surface-soft);
}

.teacher-roster-metrics .teacher-risk-pill {
  color: var(--wrong);
  background: var(--danger-soft);
  font-weight: 700;
}

.teacher-roster-open {
  white-space: nowrap;
}

.tk-name-editor {
  margin-top: 5px;
}

.tk-name-editor-form {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  width: min(520px, 75vw);
}

.tk-name-editor-form[hidden] {
  display: none;
}

.tk-name-input {
  flex: 1 1 180px;
}

.teacher-focus-header {
  width: 100%;
}

.teacher-focus-table .tk-row {
  grid-auto-flow: column;
}

.teacher-assessment-summary {
  margin: 4px 18px 16px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-left: 5px solid var(--accent);
  border-radius: 9px;
  background: var(--card);
  box-shadow: 0 10px 28px rgba(28, 39, 64, 0.07);
}

.teacher-assessment-summary p {
  margin: 8px 0 0;
  line-height: 1.6;
}

.teacher-assessment-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 10px 18px 24px;
}

.teacher-assignment-action {
  display: flex;
  flex-direction: column;
  min-height: 184px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--card);
  box-shadow: 0 8px 24px rgba(28, 39, 64, 0.07);
}

.teacher-assignment-action p {
  flex: 1;
  margin: 9px 0 14px;
  line-height: 1.55;
}

.teacher-assignment-status {
  min-height: 2.5em;
  margin-top: 9px;
}

@media (max-width: 880px) {
  .teacher-roster-card {
    grid-template-columns: 1fr auto;
  }

  .teacher-roster-metrics {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .teacher-assessment-actions {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .teacher-roster-shell {
    padding: 12px;
  }

  .teacher-roster-header,
  .teacher-roster-card {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .teacher-roster-open {
    width: 100%;
  }
}

/* ===== 深麓训练轨迹与教师首页 ===== */
.one-click-practice,
.teacher-home-assignment {
  position: relative;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--primary) 24%, var(--border));
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--primary) 9%, var(--card)), var(--card) 58%);
}

.one-click-practice::before,
.teacher-home-assignment::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--primary);
}

.one-click-intro,
.report-card-note,
.teacher-home-status {
  color: var(--text-secondary);
  font-size: 13px;
}

.practice-journey {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.practice-journey-step,
.practice-journey-total {
  display: grid;
  gap: 2px;
  min-height: 74px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--card) 92%, var(--primary));
}

.practice-journey-step strong,
.practice-journey-total strong {
  color: var(--primary);
  font-size: 22px;
  line-height: 1.2;
}

.practice-journey-step span,
.practice-journey-total span {
  color: var(--text-secondary);
  font-size: 12px;
}

.practice-journey-total {
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
}

.one-click-start {
  min-height: 42px;
  padding: 0 22px;
}

/* 错题专项三模式 (我的 / 全班 / 合并) */
.wrong-modes-practice {
  border: 1px solid color-mix(in srgb, var(--primary) 24%, var(--border));
}
.wrong-modes-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.wrong-mode-btn {
  min-height: 42px;
  padding: 0 20px;
}
.wrong-modes-status {
  margin-top: 10px;
}

.teacher-home-body {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.teacher-home-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 12px;
}

.teacher-home-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.teacher-home-due,
.report-sort-button {
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font: inherit;
}

.report-sort-button {
  cursor: pointer;
  font-weight: 650;
}

.report-sort-button:hover,
.report-sort-button:focus-visible {
  border-color: var(--primary);
  color: var(--primary);
}

.teacher-home-roster {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 8px;
  max-height: 300px;
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg) 58%, var(--card));
}

.teacher-home-student {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 7px 10px;
  border-radius: 7px;
  background: var(--card);
}

.report-sort-toolbar {
  display: flex;
  justify-content: flex-end;
  margin: -4px 0 16px;
}

.daily-domain-list {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.daily-domain-group {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg) 46%, var(--card));
}

.daily-domain-group h4 {
  font-size: 13px;
  color: var(--text-secondary);
}

.report-error-fill.good { background: var(--correct); }
.report-error-fill.fair { background: var(--warning); }
.report-error-fill.weak { background: var(--wrong); }

.report-progress-item .sp-count {
  width: 82px;
}

@media (max-width: 900px) {
  .top-bar { flex-wrap: wrap; }
  .tab-nav {
    order: 5;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    padding-bottom: 2px;
  }
  .practice-journey { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .practice-journey,
  .teacher-home-summary { grid-template-columns: 1fr; }
  .skill-progress-item { align-items: flex-start; flex-wrap: wrap; }
  .sp-name { width: 100%; }
  .sp-bar-bg { min-width: 160px; }
}

/* ===== 深麓：铺满套题与学习账簿 ===== */
.records-layout {
  padding: 0;
}

.records-shell {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 18px 20px 24px;
}

.records-subnav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: 100%;
  max-width: none;
}

.records-subnav-btn {
  width: 100%;
  min-width: 0;
}

.practice-layout,
.practice-layout #examApp,
.practice-layout .exam-select {
  width: 100%;
  max-width: none;
}

.practice-layout .exam-select {
  padding-right: 20px;
  padding-left: 20px;
}

@media (max-width: 560px) {
  .records-layout {
    padding: 0;
  }

  .records-shell {
    padding: 12px;
  }

  .records-subnav {
    width: 100%;
  }

  .practice-layout .exam-select {
    padding-right: 12px;
    padding-left: 12px;
  }
}

/* ===== 首页每日背词卡 (2026-08-04) ===== */
.dash-daily-vocab-host {
  min-height: 60px;
}
.dash-daily-vocab-hint {
  font-size: 13px;
  color: var(--text-secondary, #64748b);
  padding: 8px 0;
}
/* 首页内嵌的背词界面收紧留白, 不喧宾夺主 */
.dash-daily-vocab .vc-flashcard-wrap {
  padding: 0;
}
.dash-daily-vocab .vc-flash-progress {
  margin-bottom: 10px;
}