:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #eef3f7;
  --text: #16202a;
  --muted: #657282;
  --line: #d8e0e8;
  --primary: #1267a8;
  --primary-2: #0f8a9b;
  --danger: #b53b3b;
  --ok: #2f8f5b;
  --warn: #b87918;
  --shadow: 0 12px 34px rgba(19, 38, 57, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

button {
  cursor: pointer;
}

.app {
  display: grid;
  grid-template-columns: 292px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: #172635;
  color: #fff;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

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

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: #43b3c4;
  color: #09202a;
  font-weight: 800;
  border-radius: 8px;
}

.brand h1 {
  margin: 0 0 4px;
  font-size: 20px;
}

.brand p,
.sidebar-card p {
  margin: 0;
  color: #b7c5d1;
  font-size: 13px;
  line-height: 1.5;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-item {
  width: 100%;
  border: 0;
  background: transparent;
  color: #dce7ef;
  text-align: left;
  padding: 12px 14px;
  border-radius: 8px;
}

.nav-item:hover,
.nav-item.active {
  background: #243a4d;
  color: #fff;
}

.sidebar-card {
  margin-top: auto;
  background: #223747;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 16px;
}

.label,
.metric span,
.panel-head span {
  color: var(--muted);
  font-size: 13px;
}

.sidebar-card .label {
  color: #a9bfce;
}

.sidebar-card strong {
  display: block;
  margin: 8px 0;
  font-size: 24px;
}

.main {
  padding: 26px;
  overflow: auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.topbar h2 {
  margin: 0 0 6px;
  font-size: 28px;
}

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

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

.primary,
.secondary,
.danger {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 700;
}

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

.secondary {
  background: var(--surface-2);
  color: var(--text);
}

.danger {
  background: #f3e5e5;
  color: var(--danger);
}

.full {
  width: 100%;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.hero-guide {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 18px;
  margin-bottom: 18px;
  background: #0f2c45;
  color: #fff;
  border-radius: 8px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.eyebrow {
  color: #86d6e3;
  font-weight: 700;
  font-size: 13px;
}

.hero-guide h3 {
  margin: 10px 0;
  font-size: 30px;
  line-height: 1.25;
  max-width: 760px;
}

.hero-guide p {
  color: #d5e3ed;
  line-height: 1.7;
  margin: 0;
}

.hero-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.outcome-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 18px;
}

.outcome-card h4 {
  margin: 0 0 12px;
}

.outcome-card ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.8;
  color: #edf7fb;
}

.learning-map-panel {
  margin-bottom: 18px;
}

.first-day-panel {
  margin-bottom: 18px;
}

.first-day-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.first-day-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
}

.first-day-grid strong {
  display: block;
  color: var(--primary);
  margin-bottom: 8px;
}

.first-day-grid p,
.calm-note {
  color: #344454;
  line-height: 1.65;
  margin: 0;
}

.first-day-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 14px 0 10px;
}

.phase-map {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

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

.phase-card span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.phase-card h4 {
  margin: 8px 0;
  font-size: 15px;
}

.phase-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 13px;
}

.metric,
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric {
  padding: 18px;
}

.metric strong {
  display: block;
  margin: 10px 0;
  font-size: 30px;
}

.metric p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.progress {
  height: 8px;
  background: #e3e9ef;
  border-radius: 999px;
  overflow: hidden;
}

.progress div {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
}

.layout-2 {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 18px;
}

.panel {
  padding: 18px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.panel h3 {
  margin: 0 0 4px;
  font-size: 20px;
}

.panel h4 {
  margin: 20px 0 8px;
  font-size: 15px;
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.timeline-item strong {
  color: var(--primary);
}

.timeline-item p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.status {
  padding: 5px 9px;
  border-radius: 999px;
  background: #edf4f8;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.note {
  width: 100%;
  min-height: 210px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 12px;
  line-height: 1.55;
}

.note.small {
  min-height: 112px;
  margin-top: 12px;
}

.course-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 18px;
}

.academy-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.85fr) minmax(520px, 1.15fr);
  gap: 18px;
  align-items: start;
}

.academy-list {
  display: grid;
  gap: 12px;
}

.academy-card {
  border: 1px solid var(--line);
  background: #fbfcfd;
  border-radius: 8px;
  padding: 14px;
  cursor: pointer;
}

.academy-card.active {
  border-color: var(--primary);
  background: #eef7fb;
}

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

.academy-card-head strong {
  font-size: 16px;
}

.academy-card-head span {
  flex: 0 0 auto;
  color: #0c5d37;
  background: #e2f3ea;
  padding: 5px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.academy-card p {
  color: #344454;
  line-height: 1.65;
  margin: 10px 0;
}

.academy-card h5 {
  margin: 10px 0 6px;
}

.academy-card ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.65;
}

.viewer-panel {
  position: sticky;
  top: 18px;
}

.academy-frame {
  width: 100%;
  height: 620px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.viewer-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  margin: 10px 0 0;
}

.week-list {
  display: grid;
  gap: 8px;
}

.week-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 12px;
  text-align: left;
}

.week-btn.active {
  border-color: var(--primary);
  background: #edf7fb;
}

.week-btn strong {
  display: block;
  margin-bottom: 4px;
}

.week-btn span {
  color: var(--muted);
  font-size: 13px;
}

.badge {
  color: #0c5d37;
  background: #e2f3ea;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 12px;
}

.course-detail ul,
.questions {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.tutorial-blocks {
  display: grid;
  gap: 12px;
}

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

.tutorial-card h5 {
  margin: 0 0 8px;
  font-size: 16px;
}

.tutorial-card p {
  margin: 0;
  color: #344454;
  line-height: 1.75;
}

.ref-list {
  display: grid;
  gap: 8px;
}

.ref-list a {
  display: block;
  color: var(--primary);
  background: #eef7fb;
  border: 1px solid #cce4ef;
  border-radius: 8px;
  padding: 10px 12px;
  text-decoration: none;
  font-weight: 700;
}

.ref-list a:hover,
.links a:hover {
  border-color: var(--primary);
}

.field,
.panel select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
}

.daily-selectors {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 120px;
  gap: 10px;
  min-width: 380px;
}

.daily-lesson {
  display: grid;
  gap: 16px;
}

.daily-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 16px;
}

.daily-section h4 {
  margin: 0 0 10px;
}

.daily-section p {
  margin: 0;
  color: #344454;
  line-height: 1.75;
}

.daily-materials {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.daily-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.daily-meta-grid div {
  border: 1px solid #d6e4ed;
  border-radius: 8px;
  background: #f5f9fc;
  padding: 12px;
}

.daily-meta-grid b {
  display: block;
  color: var(--primary);
  margin-bottom: 6px;
}

.daily-meta-grid p,
.daily-meta-grid ul {
  margin: 0;
  color: #344454;
  line-height: 1.6;
}

.daily-meta-grid ul {
  padding-left: 18px;
}

.daily-materials a {
  color: var(--primary);
  background: #eef7fb;
  border: 1px solid #cce4ef;
  border-radius: 8px;
  padding: 10px 12px;
  text-decoration: none;
  font-weight: 700;
}

.daily-materials a span {
  display: block;
  color: #48606f;
  font-weight: 400;
  margin-top: 6px;
  line-height: 1.5;
  font-size: 13px;
}

.daily-why {
  border-color: #b9d7e7;
  background: #f2f9fc;
}

.standard-card {
  border-color: #cbdcb9;
  background: #f5faf0;
}

.boss-check {
  border-color: #ecd6a9;
  background: #fff9ec;
}

.boss-check ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.quiz-proof {
  margin: 0 0 12px !important;
  color: var(--muted) !important;
}

.quiz-list {
  display: grid;
  gap: 12px;
  margin-bottom: 12px;
}

.quiz-list label {
  display: grid;
  gap: 8px;
}

.quiz-list span {
  font-weight: 700;
}

.quiz-list textarea {
  width: 100%;
  min-height: 82px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  line-height: 1.55;
}

.tasks {
  display: grid;
  gap: 12px;
}

.task-card {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.task-card input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
}

.task-card h4 {
  margin: 0 0 5px;
}

.task-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.assessment-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(360px, 1fr) minmax(320px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.weekly-focus-summary,
.weekly-difficulties,
.weekly-self-check {
  display: grid;
  gap: 14px;
}

.weekly-progress-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.weekly-progress-grid div,
.weekly-card,
.difficulty-card,
.self-check-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 12px;
}

.weekly-progress-grid b {
  display: block;
  font-size: 22px;
  color: var(--primary);
}

.weekly-progress-grid span {
  color: var(--muted);
  font-size: 13px;
}

.weekly-head-card {
  background: #eef7fb;
  border-color: #cce4ef;
}

.weekly-card h4 {
  margin: 0 0 10px;
}

.weekly-card p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.weekly-card ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.difficulty-card {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
}

.difficulty-card strong {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff1c9;
  color: #7a5200;
}

.difficulty-card p {
  margin: 0;
  color: #344454;
  line-height: 1.65;
}

.self-check-card {
  display: grid;
  gap: 8px;
}

.self-check-card span {
  font-weight: 700;
  line-height: 1.5;
}

.self-check-card textarea {
  width: 100%;
  min-height: 92px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  resize: vertical;
  line-height: 1.55;
}

.glossary-list,
.example-list {
  display: grid;
  gap: 18px;
}

.practice-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
  align-items: start;
}

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

.practice-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
  text-align: left;
}

.practice-card.active {
  border-color: var(--primary);
  background: #eef7fb;
}

.practice-card strong,
.practice-card span {
  display: block;
}

.practice-card span {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.5;
  font-size: 13px;
}

.practice-detail {
  display: grid;
  gap: 14px;
}

.practice-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
}

.practice-warning {
  border-color: #ecd6a9;
  background: #fff9ec;
}

.practice-warning p {
  margin: 0;
  color: #5e4520;
  line-height: 1.65;
}

.practice-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.practice-links a {
  border: 1px solid #cce4ef;
  border-radius: 8px;
  background: #eef7fb;
  color: var(--primary);
  padding: 11px 12px;
  text-decoration: none;
}

.practice-links strong,
.practice-links span {
  display: block;
}

.practice-links span {
  color: #48606f;
  font-size: 13px;
  font-weight: 400;
  margin-top: 6px;
  line-height: 1.45;
}

.practice-section h4 {
  margin: 0 0 10px;
}

.practice-section ol {
  margin: 0;
  padding-left: 20px;
  line-height: 1.7;
}

.practice-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

.practice-form label {
  display: grid;
  gap: 6px;
}

.practice-form span {
  font-weight: 700;
}

.practice-form textarea {
  width: 100%;
  min-height: 74px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  resize: vertical;
  line-height: 1.55;
}

.glossary-group h4 {
  margin: 0 0 10px;
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.glossary-card,
.example-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
}

.glossary-card strong {
  display: block;
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 8px;
}

.glossary-card p,
.example-card p {
  margin: 8px 0 0;
  color: #344454;
  line-height: 1.6;
}

.example-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.example-head h4 {
  margin: 0;
}

.example-head span {
  flex: 0 0 auto;
  background: #e2f3ea;
  color: #0c5d37;
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.example-sample {
  margin-top: 12px;
  border-left: 3px solid var(--primary);
  background: #eef7fb;
  padding: 12px;
  line-height: 1.7;
  color: #263747;
}

.loading-note {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  color: var(--muted);
  padding: 14px;
  margin: 0;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.sku-guide {
  border: 1px solid #d6e4ed;
  border-radius: 8px;
  background: #f5f9fc;
  padding: 14px;
  margin-bottom: 14px;
}

.sku-guide p {
  margin: 6px 0 0;
  color: #344454;
  line-height: 1.6;
}

.sku-table {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

.sku-table-head,
.sku-row {
  display: grid;
  grid-template-columns: 1fr 1.15fr 1.4fr 1.15fr;
  gap: 10px;
}

.sku-table-head {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  padding: 0 4px;
}

.sku-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 12px;
}

.sku-cell {
  display: grid;
  gap: 8px;
  align-content: start;
}

.sku-cell label {
  display: grid;
  gap: 5px;
}

.sku-cell span {
  color: var(--muted);
  font-size: 12px;
}

.sku-cell input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  background: #fff;
}

.remove-sku-btn {
  justify-self: start;
}

.project-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfd;
}

.project-item h4 {
  margin-top: 0;
}

.project-item ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

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

.links a {
  display: block;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--primary);
  text-decoration: none;
  background: #fbfcfd;
  font-weight: 700;
}

.method-list p {
  margin: 0 0 14px;
  line-height: 1.7;
}

.task-sync-panel {
  margin-bottom: 22px;
}

.task-sync-page {
  max-width: 980px;
}

.task-sync-intro {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid #cce4ef;
  border-radius: 8px;
  background: #eef7fb;
}

.task-sync-intro strong {
  color: var(--primary);
}

.task-sync-intro p {
  margin: 0;
  color: #344454;
  line-height: 1.7;
}

.task-sync-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.sync-field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.sync-field span {
  color: #344454;
  font-size: 13px;
  font-weight: 700;
}

.sync-field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
}

.task-sync-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 10px;
}

.task-system-link {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.task-system-link:hover {
  text-decoration: underline;
}

.task-sync-status {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbfa;
  color: var(--muted);
  line-height: 1.6;
}

.task-sync-status[data-kind="error"] {
  border-color: #efc1c1;
  background: #fff6f6;
  color: var(--danger);
}

.task-sync-status[data-kind="ok"] {
  border-color: #bde0cc;
  background: #f3fbf6;
  color: var(--ok);
}

.task-sync-status[data-kind="info"] {
  border-color: #cce4ef;
  background: #eef7fb;
  color: var(--primary);
}

.badge.ok {
  background: #e2f3ea;
  color: #0c5d37;
}

.ai-shortcut-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0 0 14px;
}

.assessment-shortcut {
  margin-bottom: 14px;
}

.ai-shortcut {
  border: 1px solid #cce4ef;
  background: #eef7fb;
  color: var(--primary);
  border-radius: 8px;
  padding: 9px 14px;
  font-weight: 700;
}

.ai-shortcut:hover {
  border-color: var(--primary);
}

.ai-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 18px;
  align-items: start;
}

.ai-ask-panel,
.ai-history-panel {
  min-width: 0;
}

.ai-form {
  display: grid;
  gap: 12px;
  margin-bottom: 14px;
}

.ai-guide {
  display: grid;
  gap: 10px;
  margin: 0 0 16px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbfa;
}

.ai-guide strong {
  color: var(--ink);
}

.ai-prompt-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-prompt-chip {
  border: 1px solid #b9d7cf;
  border-radius: 999px;
  background: #ffffff;
  color: #245449;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.ai-prompt-chip:hover {
  background: #ecf7f3;
}

.ai-field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.ai-field span {
  font-weight: 700;
  color: #344454;
  font-size: 13px;
}

.ai-field input,
.ai-field select,
.ai-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  line-height: 1.55;
}

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

.ai-field textarea.ai-context {
  min-height: 70px;
}

.ai-field-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.ai-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.ai-status {
  color: var(--muted);
  font-size: 13px;
}

.ai-status[data-kind="error"] {
  color: var(--danger);
}

.ai-status[data-kind="ok"] {
  color: var(--ok);
}

.ai-answer {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
  min-height: 140px;
}

.ai-answer-card header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
}

.ai-answer-card header strong {
  color: var(--primary);
}

.ai-answer-card header span {
  font-size: 12px;
  background: #e2f3ea;
  color: #0c5d37;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
}

.ai-answer-body {
  line-height: 1.75;
  color: #1f2c39;
  white-space: normal;
  word-break: break-word;
}

.ai-warning {
  margin: 12px 0 0;
  border-left: 3px solid var(--warn);
  background: #fff9ec;
  padding: 8px 12px;
  color: #5e4520;
  border-radius: 6px;
  line-height: 1.6;
}

.ai-error {
  margin: 0;
  border-left: 3px solid var(--danger);
  background: #fbecec;
  padding: 10px 12px;
  color: var(--danger);
  border-radius: 6px;
  line-height: 1.6;
}

.ai-history {
  display: grid;
  gap: 12px;
  max-height: 720px;
  overflow-y: auto;
  padding-right: 4px;
}

.ai-history-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 12px;
}

.ai-history-item header {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.ai-history-question {
  margin: 0 0 8px;
  color: #1f2c39;
  line-height: 1.6;
  word-break: break-word;
}

.ai-history-answer {
  color: #344454;
  line-height: 1.7;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  word-break: break-word;
}

@media (max-width: 1080px) {
  .ai-layout,
  .ai-field-row {
    grid-template-columns: 1fr;
  }
}

/* ===== V3 学习台样式 ===== */

.workbench-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 18px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #0f2c45, #133a55);
  color: #fff;
  border-radius: 12px;
  padding: 24px 26px;
  box-shadow: var(--shadow);
}

.workbench-hero-left .eyebrow {
  color: #86d6e3;
  font-weight: 700;
  font-size: 13px;
}

.workbench-hero-left h3 {
  margin: 8px 0 10px;
  font-size: 26px;
  line-height: 1.3;
}

.workbench-hero-left p {
  margin: 0;
  color: #d5e3ed;
  line-height: 1.7;
}

.workbench-hero-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.workbench-hero-status {
  display: grid;
  gap: 10px;
  align-content: start;
}

.status-line {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 10px;
  align-items: center;
}

.status-line span {
  color: #b7d2e0;
  font-size: 13px;
}

.status-line strong {
  color: #fff;
  font-size: 14px;
  word-break: break-all;
}

.workbench-entries {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.entry-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 18px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.entry-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.entry-tag {
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  background: #eef7fb;
  padding: 4px 8px;
  border-radius: 999px;
}

.entry-card h3 {
  margin: 12px 0 8px;
  font-size: 18px;
}

.entry-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.entry-cta {
  display: inline-block;
  margin-top: 10px;
  color: var(--primary);
  font-weight: 700;
}

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

.sync-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.sync-mini-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 10px 12px;
}

.sync-mini-grid span {
  color: var(--muted);
  font-size: 12px;
}

.sync-mini-grid strong {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  color: var(--text);
  word-break: break-word;
}

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

.daily-panel {
  display: grid;
  gap: 14px;
}

.daily-head {
  align-items: flex-start;
}

.daily-controls {
  display: grid;
  gap: 8px;
}

.daily-state-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.day-state-tag {
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
}

.day-state-today { background: #eaf3fb; color: var(--primary); }
.day-state-done { background: #e2f3ea; color: #0c5d37; }
.day-state-ahead { background: #fff1c9; color: #7a5200; }
.day-state-backlog { background: #fbecec; color: var(--danger); }

.daily-flexible-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  background: #f5f9fc;
  border: 1px solid #d6e4ed;
  border-radius: 8px;
  padding: 10px 12px;
}

.daily-flex-hint {
  color: var(--muted);
  font-size: 13px;
}

.daily-first-screen {
  border: 1px solid #b9d7e7;
  background: #f2f9fc;
}

.daily-first-screen h4 {
  margin: 8px 0 12px;
  font-size: 18px;
}

.daily-first-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.daily-first-block {
  background: #fff;
  border: 1px solid #cce4ef;
  border-radius: 8px;
  padding: 12px;
}

.daily-first-block h5 {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 14px;
}

.daily-first-block p {
  margin: 0;
  color: #344454;
  line-height: 1.65;
  font-size: 14px;
}

.daily-first-sub {
  margin-top: 8px !important;
  color: var(--muted) !important;
  font-size: 13px !important;
}

.daily-materials.compact {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}

.daily-materials.compact a {
  padding: 8px 10px;
  font-size: 13px;
}

.daily-materials.compact a span {
  font-size: 12px;
  margin-top: 4px;
}

.daily-extra,
.daily-extra-section {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 0;
}

.daily-extra summary,
.daily-extra-section summary {
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 700;
  color: var(--primary);
  list-style: none;
}

.daily-extra summary::-webkit-details-marker,
.daily-extra-section summary::-webkit-details-marker {
  display: none;
}

.daily-extra summary::before,
.daily-extra-section summary::before {
  content: "▸";
  margin-right: 8px;
  display: inline-block;
  transition: transform 0.15s;
}

.daily-extra[open] summary::before,
.daily-extra-section[open] summary::before {
  transform: rotate(90deg);
}

.daily-extra > .tasks,
.daily-extra > .self-check-hints,
.daily-extra-section > .daily-extra-grid,
.daily-extra-section > .risk-note,
.daily-extra-section > .long-term-link {
  padding: 0 14px 14px;
}

.daily-extra-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.daily-extra-grid article {
  border: 1px solid #d6e4ed;
  border-radius: 8px;
  background: #fff;
  padding: 12px;
}

.daily-extra-grid h5 {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 14px;
}

.daily-extra-grid p,
.daily-extra-grid ul,
.risk-note p,
.risk-note ul,
.long-term-link p,
.long-term-link ul,
.self-check-hints p {
  margin: 6px 0 0;
  color: #344454;
  line-height: 1.65;
  font-size: 14px;
}

.risk-tags {
  margin-top: 10px !important;
  color: var(--warn) !important;
  font-weight: 700;
  font-size: 13px !important;
}

.daily-quiz-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin: 10px 0;
}

.ai-feedback-box {
  margin-top: 12px;
}

.long-term-panel {
  margin-top: 18px;
}

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

.long-term-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
}

.long-term-card header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.long-term-card header strong {
  color: var(--primary);
}

.long-term-card header span {
  color: var(--muted);
  font-size: 12px;
}

.long-term-card ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.long-term-foot {
  margin: 8px 0 0 !important;
  color: var(--muted) !important;
  font-size: 13px;
}

.resource-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}

.resource-tab {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 7px 14px;
  font-weight: 700;
  font-size: 13px;
}

.resource-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.resource-pane {
  display: block;
}

.resource-pane[hidden] {
  display: none;
}

.task-sync-help {
  margin: 0 0 14px;
  border: 1px solid #cce4ef;
  border-radius: 8px;
  background: #eef7fb;
  padding: 0;
}

.task-sync-help summary {
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 700;
  color: var(--primary);
}

.task-sync-help-body {
  padding: 0 14px 14px;
}

.task-sync-help-body p {
  margin: 0 0 8px;
  color: #344454;
  line-height: 1.65;
}

@media (max-width: 1080px) {
  .workbench-hero,
  .workbench-entries,
  .dashboard-grid,
  .daily-first-grid,
  .daily-extra-grid,
  .long-term-grid {
    grid-template-columns: 1fr;
  }

  .daily-controls {
    width: 100%;
  }
}

@media (max-width: 680px) {
  .workbench-hero {
    padding: 18px;
  }

  .workbench-hero-left h3 {
    font-size: 22px;
  }

  .status-line {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .resource-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  .daily-flexible-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .daily-quiz-actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 680px) {
  .ai-shortcut-row {
    flex-direction: column;
  }

  .ai-shortcut {
    width: 100%;
    text-align: center;
  }

  .ai-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .ai-actions button {
    width: 100%;
  }
}

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

  .sidebar {
    position: static;
  }

  .nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .metrics,
  .layout-2,
  .hero-guide,
  .course-shell,
  .academy-layout,
  .assessment-layout,
  .practice-layout,
  .project-grid,
  .first-day-grid,
  .phase-map,
  .glossary-grid {
    grid-template-columns: 1fr;
  }

  .sku-table-head {
    display: none;
  }

  .sku-row {
    grid-template-columns: 1fr;
  }

  .viewer-panel {
    position: static;
  }

  .academy-frame {
    height: 520px;
  }
}

@media (max-width: 680px) {
  .main,
  .sidebar {
    padding: 16px;
  }

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

  .top-actions,
  .daily-selectors,
  .nav {
    grid-template-columns: 1fr;
    display: grid;
  }

  .daily-selectors {
    min-width: 0;
  }

  .daily-materials {
    grid-template-columns: 1fr;
  }

  .practice-form,
  .practice-links,
  .daily-meta-grid,
  .weekly-progress-grid {
    grid-template-columns: 1fr;
  }

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

  .timeline-item {
    grid-template-columns: 1fr;
  }
}