:root {
  color-scheme: light;
  --primary: #6657e8;
  --primary-strong: #5144cc;
  --primary-soft: #efedff;
  --primary-mist: #f7f6ff;
  --ink: #20202a;
  --ink-2: #3d3d4c;
  --muted: #747487;
  --muted-2: #9898a8;
  --line: #e7e7ef;
  --line-strong: #d9d9e5;
  --surface: #ffffff;
  --surface-2: #f8f8fb;
  --surface-soft: #f8f8fb;
  --text: #20202a;
  --canvas: #f4f5f8;
  --success: #1aa374;
  --success-soft: #e8f8f2;
  --warning: #d88b24;
  --warning-soft: #fff4df;
  --danger: #df5a6b;
  --danger-soft: #fff0f2;
  --info: #3c78d8;
  --info-soft: #edf4ff;
  --sidebar: 240px;
  --header: 68px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(24, 23, 42, 0.04), 0 4px 14px rgba(24, 23, 42, 0.035);
  --shadow-md: 0 12px 38px rgba(32, 27, 85, 0.12);
  --shadow-lg: 0 24px 72px rgba(24, 20, 66, 0.2);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Real course generation and source-grounded learning */
.sources-layout--preview {
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr);
}

.file-row--button {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: start;
  cursor: pointer;
}

.file-row--button:hover,
.file-row--button.active {
  background: color-mix(in srgb, var(--primary) 7%, var(--surface));
}

.source-preview-card {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 118px);
  overflow: hidden;
}

.source-chunk-list {
  display: grid;
  gap: 10px;
  max-height: calc(100vh - 220px);
  overflow: auto;
}

.source-chunk {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft);
}

.source-chunk > span,
.source-chunk > code {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 11px;
}

.source-chunk p {
  margin: 6px 0;
  line-height: 1.55;
}

.source-chunk--heading {
  border-inline-start: 3px solid var(--primary);
}

.source-chunk--table {
  border-inline-start: 3px solid #2f9e8f;
}

.source-image img,
.course-figure img {
  display: block;
  max-width: 100%;
  max-height: 420px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 10px;
}

.source-image figcaption,
.course-figure figcaption {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.studio-primary-action {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
}

.error-text,
.gateway-error {
  color: #b42318;
}

.blueprint-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.blueprint-grid label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.outline-editor {
  margin: 24px 0 18px;
}

.outline-module {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
}

.outline-fields {
  display: grid;
  flex: 1;
  gap: 8px;
}

.outline-lessons {
  display: grid;
  gap: 8px;
  margin: 14px 0 0 48px;
}

.outline-lesson {
  display: grid;
  grid-template-columns: 22px minmax(180px, 1fr) 120px 80px auto;
  align-items: center;
  gap: 8px;
}

.evidence-count,
.version-pill {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.generation-progress {
  height: 7px;
  margin-bottom: 16px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-soft);
}

.generation-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), #8c7ff4);
  transition: width .35s ease;
}

.real-course-canvas,
.course-reader {
  max-width: 860px;
}

.lesson-objectives {
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px solid color-mix(in srgb, var(--primary) 20%, var(--line));
  border-radius: 12px;
  background: color-mix(in srgb, var(--primary) 5%, var(--surface));
}

.lesson-objectives ul {
  margin: 9px 0 0 18px;
}

.course-content-block {
  position: relative;
  margin: 18px 0;
  padding: 22px;
  border: 1px solid transparent;
  border-radius: 14px;
}

.course-content-block:hover,
.course-content-block.selected {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--line));
  background: color-mix(in srgb, var(--primary) 3%, var(--surface));
}

.course-content-block--safety {
  border-inline-start: 4px solid #e04f3d;
  background: #fff7f5;
}

.course-content-block--callout,
.course-content-block--worked_example {
  border-inline-start: 4px solid var(--primary);
  background: var(--surface-soft);
}

.content-block-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.course-rich-text,
.course-items,
.knowledge-block {
  color: var(--text);
  font-size: 15px;
  line-height: 1.75;
}

.course-items {
  margin: 12px 0 0 20px;
}

.real-citations {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 14px;
}

.real-citations .source-citation {
  width: auto;
  cursor: pointer;
}

.course-assessment {
  margin-top: 28px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-soft);
}

.assessment-question {
  margin-top: 16px;
  padding: 18px;
  border-radius: 12px;
  background: var(--surface);
}

.answer-options {
  display: grid;
  gap: 9px;
  margin-top: 12px;
}

.answer-options label {
  display: flex;
  gap: 8px;
}

.modal--wide {
  width: min(980px, 100%);
}

.ai-diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.diff-copy {
  min-height: 180px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  white-space: pre-wrap;
  line-height: 1.65;
}

.diff-copy--before { background: #fff8f7; }
.diff-copy--after { background: #f4fbf7; }

.muted { color: var(--muted); }

@media (max-width: 1100px) {
  .sources-layout--preview { grid-template-columns: 1fr; }
  .source-preview-card { position: static; max-height: none; }
  .source-chunk-list { max-height: 520px; }
  .blueprint-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .outline-lesson { grid-template-columns: 22px minmax(160px, 1fr) 110px 72px; }
  .evidence-count { grid-column: 2 / -1; }
}

@media (max-width: 720px) {
  .blueprint-grid,
  .ai-diff-grid { grid-template-columns: 1fr; }
  .outline-lessons { margin-inline-start: 0; }
  .outline-lesson { grid-template-columns: 20px 1fr; }
  .outline-lesson .select,
  .outline-lesson input[type="number"],
  .outline-lesson .evidence-count { grid-column: 2; }
}

[dir="rtl"] {
  font-family: "Noto Sans Arabic", Inter, ui-sans-serif, sans-serif;
}

.rtl-mirror {
  transform: scaleX(-1);
}

[dir="rtl"] .rtl-mirror {
  transform: none;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
}

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

button {
  color: inherit;
}

button,
a,
select,
input[type="checkbox"] {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
h4 {
  margin-top: 0;
}

.boot-screen {
  min-height: 100vh;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 18px;
  color: var(--muted);
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
}

.brand-mark::before,
.brand-mark span {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.brand-mark::before {
  inset: 2px;
  border: 7px solid var(--primary);
  border-inline-end-color: transparent;
  transform: rotate(-18deg);
}

.brand-mark span:first-child {
  width: 8px;
  height: 8px;
  background: #a39af5;
  inset-inline-end: 1px;
  top: 2px;
}

.brand-mark span:last-child {
  width: 5px;
  height: 5px;
  background: #d2ceff;
  inset-inline-start: 3px;
  bottom: 1px;
}

.brand-mark--large {
  width: 52px;
  height: 52px;
}

.brand-mark--large::before {
  border-width: 10px;
}

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

.sidebar {
  position: fixed;
  z-index: 40;
  inset-block: 0;
  inset-inline-start: 0;
  width: var(--sidebar);
  background: #fbfbfd;
  border-inline-end: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 22px 14px 16px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px 23px;
}

.brand-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-name small {
  display: block;
  margin-top: 1px;
  font-size: 9px;
  color: var(--muted-2);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-section-label {
  padding: 9px 12px 7px;
  color: var(--muted-2);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

.sidebar-nav {
  display: grid;
  gap: 3px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 42px;
  gap: 12px;
  padding: 0 12px;
  border-radius: 10px;
  color: #666677;
  font-weight: 500;
  cursor: pointer;
  transition: 150ms ease;
}

.nav-item:hover {
  background: #f2f1f9;
  color: var(--ink);
}

.nav-item.active {
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-weight: 650;
}

.nav-item.active::before {
  content: "";
  position: absolute;
  inset-inline-start: -14px;
  width: 3px;
  height: 22px;
  background: var(--primary);
  border-radius: 0 4px 4px 0;
}

[dir="rtl"] .nav-item.active::before {
  border-radius: 4px 0 0 4px;
}

.nav-item .icon {
  flex: 0 0 auto;
}

.nav-group { border-radius: 8px; overflow: hidden; }
.nav-group-toggle { width: 100%; border: none; background: none; cursor: pointer; }
.nav-group-chevron { transition: transform .2s; margin-inline-start: auto; }
.nav-group.expanded .nav-group-chevron { transform: rotate(180deg); }
.nav-sub { display: none; padding-inline-start: 28px; }
.nav-group.expanded .nav-sub { display: flex; flex-direction: column; gap: 2px; }
.nav-sub-item { font-size: 13px; padding: 6px 10px; border-radius: 8px; }

.nav-badge {
  margin-inline-start: auto;
  min-width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  padding: 0 6px;
  border-radius: 999px;
  font-size: 10px;
  color: #fff;
  background: var(--danger);
}

.sidebar-bottom {
  margin-top: auto;
  display: grid;
  gap: 10px;
}

.demo-card {
  padding: 14px;
  background: linear-gradient(145deg, #f2f0ff, #f8f7ff);
  border: 1px solid #dfdcff;
  border-radius: 12px;
}

.demo-card strong {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--primary-strong);
  font-size: 12px;
}

.demo-card p {
  margin: 7px 0 11px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}
.demo-card-close {
  position: absolute;
  top: 8px;
  inset-inline-end: 8px;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border: none; background: none;
  color: var(--muted); cursor: pointer;
  border-radius: 4px;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px;
  border-top: 1px solid var(--line);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  background: linear-gradient(145deg, #a79df4, #6556d7);
  color: white;
  font-size: 11px;
  font-weight: 700;
}

.avatar--teacher {
  background: linear-gradient(145deg, #3b404d, #777d8b);
}

.avatar--green {
  background: linear-gradient(145deg, #3db58c, #14765a);
}

.avatar--small {
  width: 28px;
  height: 28px;
  font-size: 9px;
}

.user-meta {
  min-width: 0;
  flex: 1;
}

.user-meta strong,
.user-meta span {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-meta strong {
  font-size: 12px;
}

.user-meta span {
  margin-top: 2px;
  color: var(--muted-2);
  font-size: 10px;
  text-transform: capitalize;
}

.topbar {
  position: fixed;
  z-index: 35;
  inset-block-start: 0;
  inset-inline: var(--sidebar) 0;
  height: var(--header);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.top-action.mobile-menu {
  display: none;
}

.topbar-title {
  min-width: 160px;
}

.topbar-title strong {
  display: block;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.topbar-title span {
  display: block;
  color: var(--muted-2);
  font-size: 10px;
  margin-top: 2px;
}

.search-box {
  width: min(360px, 30vw);
  height: 38px;
  display: flex;
  align-items: center;
  gap: 9px;
  margin-inline: auto 0;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted-2);
  background: #fbfbfd;
}

.search-box input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-size: 12px;
}

.search-shortcut {
  padding: 2px 5px;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-size: 9px;
  color: var(--muted-2);
  white-space: nowrap;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.locale-switcher,
.role-switcher {
  position: relative;
}

.top-action {
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  transition: 150ms ease;
  font-size: 11px;
  font-weight: 600;
}

.top-action:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.top-action--icon {
  width: 38px;
  padding: 0;
  position: relative;
}

.notification-dot {
  position: absolute;
  top: 4px;
  inset-inline-end: 4px;
  min-width: 18px; height: 18px;
  padding: 0 5px;
  display: grid; place-items: center;
  font-size: 10px; font-weight: 700;
  color: #fff;
  background: var(--danger);
  border-radius: 999px;
}

.dropdown {
  position: absolute;
  z-index: 80;
  top: calc(100% + 8px);
  inset-inline-end: 0;
  width: 210px;
  padding: 7px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

.dropdown.hidden {
  display: none;
}

.dropdown-label {
  padding: 8px 9px 6px;
  color: var(--muted-2);
  text-transform: uppercase;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.dropdown button {
  width: 100%;
  min-height: 38px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
  text-align: start;
  cursor: pointer;
  font-size: 12px;
}

.dropdown button:hover,
.dropdown button.active {
  background: var(--primary-mist);
  color: var(--primary-strong);
}

.dropdown button .icon:last-child {
  margin-inline-start: auto;
}

.page-shell {
  min-height: 100vh;
  margin-inline-start: var(--sidebar);
  padding-top: var(--header);
}

.page-content {
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 28px 32px 52px;
}

.page-content--wide {
  width: 100%;
  max-width: none;
  padding: 0;
}

.page-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.page-heading h1 {
  margin-bottom: 6px;
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

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

.heading-actions {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.button {
  min-height: 38px;
  padding: 0 15px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 650;
  transition: transform 120ms ease, background 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.button:hover {
  border-color: #c9c8d6;
  background: #fafafd;
}

.button:active {
  transform: translateY(1px);
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.button--primary {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
  box-shadow: 0 6px 16px rgba(102, 87, 232, 0.2);
}

.button--primary:hover {
  border-color: var(--primary-strong);
  background: var(--primary-strong);
}

.button--soft {
  border-color: #ddd9ff;
  background: var(--primary-soft);
  color: var(--primary-strong);
}

.button--soft:hover {
  border-color: #cbc5ff;
  background: #e5e1ff;
}

.button--danger {
  color: var(--danger);
  border-color: #ffd1d7;
  background: var(--danger-soft);
}

.button--ghost {
  border-color: transparent;
  background: transparent;
}

.button--small {
  min-height: 32px;
  padding: 0 11px;
  font-size: 11px;
}

.button--wide {
  width: 100%;
}

.button--icon {
  width: 36px;
  min-height: 36px;
  padding: 0;
}

.button .spin,
.spin {
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.kicker {
  margin-bottom: 7px;
  color: var(--primary-strong);
  font-size: 10px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 19px 14px;
}

.card-header h2,
.card-header h3 {
  margin: 0;
  font-size: 14px;
  letter-spacing: -0.01em;
}

.card-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.card-body {
  padding: 0 19px 19px;
}

.text-link {
  border: 0;
  padding: 0;
  background: none;
  color: var(--primary-strong);
  font-size: 11px;
  font-weight: 650;
  cursor: pointer;
}

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

.muted {
  color: var(--muted);
}

.small {
  font-size: 11px;
}

.tiny {
  font-size: 10px;
}

.divider {
  height: 1px;
  background: var(--line);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 23px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 650;
  white-space: nowrap;
}

.status::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

.status--published,
.status--completed,
.status--available,
.status--resolved {
  color: var(--success);
  background: var(--success-soft);
}

.status--draft,
.status--unanswered,
.status--warning,
.status--in-progress {
  color: var(--warning);
  background: var(--warning-soft);
}

.status--review,
.status--answered,
.status--info {
  color: var(--info);
  background: var(--info-soft);
}

.status--outdated,
.status--danger,
.status--error {
  color: var(--danger);
  background: var(--danger-soft);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 6px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  font-size: 10px;
  font-weight: 600;
}

.tag--purple {
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-color: #ddd9ff;
}

.tag--secure {
  color: #985d10;
  background: #fff6e8;
  border-color: #f3dfba;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.8fr);
  gap: 18px;
  margin-bottom: 18px;
}

.welcome-card {
  position: relative;
  overflow: hidden;
  min-height: 238px;
  padding: 31px;
  border: 0;
  background:
    radial-gradient(circle at 82% 18%, rgba(255,255,255,.42), transparent 17%),
    radial-gradient(circle at 92% 78%, rgba(255,255,255,.18), transparent 24%),
    linear-gradient(135deg, #6a5be9 0%, #5143c9 100%);
  color: white;
  box-shadow: 0 18px 40px rgba(74, 61, 188, 0.2);
}

.welcome-card::after {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  inset-inline-end: -55px;
  top: -65px;
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 50%;
  box-shadow: inset 0 0 0 28px rgba(255,255,255,.04), inset 0 0 0 58px rgba(255,255,255,.025);
}

.welcome-card-close {
  position: absolute;
  top: 14px;
  inset-inline-end: 14px;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border: none; background: rgba(255,255,255,.15);
  color: #fff; cursor: pointer;
  border-radius: 8px;
  transition: background .15s;
}
.welcome-card-close:hover { background: rgba(255,255,255,.25); }
.welcome-card .kicker {
  color: #d9d5ff;
}

.welcome-card h1 {
  position: relative;
  z-index: 1;
  max-width: 530px;
  margin-bottom: 12px;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.welcome-card p {
  position: relative;
  z-index: 1;
  max-width: 530px;
  color: rgba(255,255,255,.78);
  line-height: 1.65;
}

.welcome-actions {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 10px;
  margin-top: 24px;
}

.button--white {
  border-color: white;
  background: white;
  color: var(--primary-strong);
}

.button--white:hover {
  background: #f5f3ff;
  border-color: #f5f3ff;
}

.button--glass {
  border-color: rgba(255,255,255,.28);
  background: rgba(255,255,255,.1);
  color: white;
}

.button--glass:hover {
  border-color: rgba(255,255,255,.4);
  background: rgba(255,255,255,.16);
}

.today-card {
  padding: 20px;
}

.today-card h3 {
  margin-bottom: 4px;
  font-size: 14px;
}

.today-card > p {
  color: var(--muted);
  font-size: 11px;
}

.today-list {
  display: grid;
  gap: 14px;
  margin-top: 17px;
}

.today-item {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 10px;
  align-items: center;
}

.today-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--primary-strong);
  background: var(--primary-soft);
}

.today-icon--orange {
  color: #bc7115;
  background: #fff2dd;
}

.today-icon--blue {
  color: #2c68be;
  background: #e9f2ff;
}

.today-item strong,
.today-item span {
  display: block;
}

.today-item strong {
  font-size: 11px;
}

.today-item span {
  margin-top: 3px;
  color: var(--muted-2);
  font-size: 9px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 13px;
  min-height: 92px;
  padding: 17px;
}

.stat-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-radius: 11px;
}

.stat-icon--green { color: #15815d; background: #e4f7f0; }
.stat-icon--orange { color: #b86a0c; background: #fff1dd; }
.stat-icon--blue { color: #2b69c0; background: #eaf2ff; }

.stat-info strong {
  display: block;
  font-size: 22px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.stat-info span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 10px;
}

.stat-change {
  margin-inline-start: auto;
  align-self: flex-start;
  color: var(--success);
  font-size: 9px;
  font-weight: 650;
}
.stat-change-label {
  font-size: 9px;
  color: var(--muted);
  font-weight: 400;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 18px;
}

.course-row {
  display: grid;
  grid-template-columns: 54px minmax(180px, 1fr) 110px 88px 90px 32px;
  gap: 12px;
  align-items: center;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.course-thumb {
  position: relative;
  width: 54px;
  height: 42px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 8px;
  background: linear-gradient(145deg, #24253a, #4f5576);
  color: white;
}

.course-thumb::after {
  content: "";
  position: absolute;
  width: 30px;
  height: 30px;
  border: 4px solid rgba(255,255,255,.18);
  border-radius: 50%;
  inset-inline-end: -6px;
  bottom: -8px;
}

.course-thumb--amber { background: linear-gradient(145deg, #896129, #d1953f); }
.course-thumb--green { background: linear-gradient(145deg, #245c50, #4d9a86); }

.course-main {
  min-width: 0;
}

.course-main strong,
.course-main span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-main strong {
  font-size: 11px;
}

.course-main span {
  margin-top: 4px;
  color: var(--muted-2);
  font-size: 9px;
}

.course-meta-label {
  color: var(--muted);
  font-size: 10px;
}

.progress-track {
  width: 100%;
  height: 5px;
  overflow: hidden;
  background: #e9e9f0;
  border-radius: 999px;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
  transition: width .35s ease;
}

.progress-fill--green { background: var(--success); }
.progress-fill--orange { background: var(--warning); }

.activity-list {
  display: grid;
  gap: 0;
}

.activity-item {
  position: relative;
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  padding: 8px 0 15px;
}

.activity-item:not(:last-child)::before {
  content: "";
  position: absolute;
  top: 34px;
  bottom: -2px;
  inset-inline-start: 14px;
  width: 1px;
  background: var(--line);
}

.activity-dot {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-strong);
}

.activity-content strong {
  font-size: 10px;
}

.activity-content p {
  margin: 3px 0 4px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.45;
}

.activity-content time {
  color: var(--muted-2);
  font-size: 9px;
}

.toolbar {
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: white;
  border-bottom: 1px solid var(--line);
}

.toolbar-title {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 240px;
}

.toolbar-title strong {
  display: block;
  font-size: 12px;
}

.toolbar-title span {
  display: block;
  color: var(--muted-2);
  font-size: 9px;
  margin-top: 2px;
}

.course-code-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: white;
  border-radius: 8px;
  background: linear-gradient(145deg, #3d4053, #73798f);
  font-size: 8px;
  font-weight: 750;
}

.toolbar-tabs {
  align-self: stretch;
  display: flex;
  align-items: stretch;
  gap: 4px;
  margin-inline: auto;
}

.toolbar-tab {
  position: relative;
  border: 0;
  background: transparent;
  padding: 0 12px;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

.toolbar-tab:hover {
  color: var(--ink);
}

.toolbar-tab.active {
  color: var(--primary-strong);
  font-weight: 650;
}

.toolbar-tab.active::after {
  content: "";
  position: absolute;
  height: 2px;
  inset-inline: 8px;
  bottom: -9px;
  background: var(--primary);
  border-radius: 2px 2px 0 0;
}

.toolbar-actions {
  min-width: 240px;
  display: flex;
  justify-content: flex-end;
  gap: 7px;
}

.studio-shell {
  height: calc(100vh - var(--header) - 56px);
  display: grid;
  grid-template-columns: 255px minmax(520px, 1fr) 292px;
  background: #f0f1f5;
}

.studio-panel {
  min-width: 0;
  background: #fff;
  overflow-y: auto;
}

.studio-panel--tree {
  border-inline-end: 1px solid var(--line);
}

.studio-panel--inspector {
  border-inline-start: 1px solid var(--line);
}

.studio-panel-header {
  position: sticky;
  z-index: 2;
  top: 0;
  background: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  padding: 0 15px;
  border-bottom: 1px solid var(--line);
}

.studio-panel-header strong {
  font-size: 11px;
}

.module-tree {
  padding: 10px 8px 24px;
}

.tree-module {
  margin-bottom: 4px;
}

.tree-module-heading {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 7px;
  color: var(--ink-2);
  font-size: 10px;
  font-weight: 650;
}

.tree-number {
  color: var(--muted-2);
  font-size: 9px;
}

.tree-lessons {
  display: grid;
  gap: 2px;
  padding-inline-start: 13px;
}

.tree-lesson {
  display: grid;
  grid-template-columns: 16px 1fr 18px;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 7px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  text-align: start;
  font-size: 10px;
  cursor: pointer;
}

.tree-lesson:hover {
  background: var(--surface-2);
}

.tree-lesson.active {
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-weight: 600;
}

.studio-canvas-wrap {
  overflow: auto;
  padding: 28px 35px 70px;
}

.editor-canvas {
  width: min(760px, 100%);
  min-height: 760px;
  margin: 0 auto;
  padding: 50px 59px 80px;
  background: white;
  border: 1px solid #e4e4ec;
  border-radius: 6px;
  box-shadow: 0 10px 28px rgba(40, 39, 62, .07);
}

.editor-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 29px;
  color: var(--muted-2);
  font-size: 9px;
}

.editor-title-block {
  position: relative;
  margin-bottom: 27px;
}

.editor-title-block h1 {
  margin-bottom: 8px;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.editor-title-block p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.editable-block {
  position: relative;
  margin: 19px -13px;
  padding: 13px;
  border: 1px solid transparent;
  border-radius: 9px;
  transition: 150ms ease;
}

.editable-block:hover,
.editable-block.selected {
  border-color: #cfcaff;
  box-shadow: 0 0 0 2px rgba(102,87,232,.07);
}

.block-tools {
  position: absolute;
  z-index: 2;
  top: -15px;
  inset-inline-end: 8px;
  display: none;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 7px;
  box-shadow: var(--shadow-sm);
}

.editable-block:hover .block-tools,
.editable-block.selected .block-tools {
  display: flex;
}

.block-tools button {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.block-tools button:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.eyebrow {
  color: var(--primary-strong);
  font-size: 9px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: .1em;
}

.lesson-lead {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.safety-callout {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  padding: 16px;
  border: 1px solid #f0dbb6;
  border-inline-start: 4px solid var(--warning);
  background: #fffaf1;
  border-radius: 9px;
}

.callout-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: #b96d0e;
  background: #ffedd0;
  border-radius: 9px;
}

.safety-callout strong {
  display: block;
  margin-bottom: 4px;
  font-size: 11px;
}

.safety-callout p {
  margin: 0;
  color: #70562e;
  font-size: 10px;
  line-height: 1.6;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
  margin-top: 12px;
}

.process-step {
  position: relative;
  min-height: 112px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fcfcfe;
}

.process-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  z-index: 1;
  top: 45px;
  inset-inline-end: -18px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: white;
  color: var(--primary);
}

[dir="rtl"] .process-step:not(:last-child)::after {
  content: "←";
}

.step-number {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  margin-bottom: 11px;
  border-radius: 7px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 9px;
  font-weight: 750;
}

.process-step strong {
  display: block;
  font-size: 10px;
}

.process-step p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.5;
}

.source-citation {
  margin-top: 25px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 9px;
}

.source-citation .icon {
  color: var(--primary);
}

.inspector-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 8px;
  border-bottom: 1px solid var(--line);
}

.inspector-tab {
  min-height: 32px;
  border: 0;
  border-radius: 7px;
  color: var(--muted);
  background: transparent;
  font-size: 10px;
  cursor: pointer;
}

.inspector-tab.active {
  color: var(--ink);
  background: var(--surface-2);
  font-weight: 650;
}

.inspector-section {
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.inspector-section h4 {
  margin-bottom: 12px;
  font-size: 10px;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

.field:last-child {
  margin-bottom: 0;
}

.field label {
  color: var(--muted);
  font-size: 9px;
  font-weight: 600;
}

.input,
.select,
.textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  outline: none;
  transition: 150ms ease;
}

.input,
.select {
  height: 36px;
  padding: 0 10px;
}

.textarea {
  min-height: 96px;
  padding: 10px;
  resize: vertical;
  line-height: 1.55;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102,87,232,.1);
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.ai-tool {
  min-height: 66px;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 5px;
  padding: 10px;
  border: 1px solid #e1deff;
  border-radius: 9px;
  background: var(--primary-mist);
  color: var(--primary-strong);
  cursor: pointer;
  text-align: start;
  font-size: 9px;
  font-weight: 650;
}

.ai-tool:hover {
  border-color: #c8c1ff;
  background: var(--primary-soft);
}

.ai-model-note {
  display: flex;
  gap: 7px;
  align-items: center;
  margin-top: 10px;
  color: var(--muted-2);
  font-size: 8px;
}

.sources-layout,
.publish-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 18px;
  padding: 24px;
  background: var(--canvas);
  min-height: calc(100vh - var(--header) - 56px);
}

.source-dropzone {
  padding: 30px;
  display: grid;
  justify-items: center;
  text-align: center;
  border: 1.5px dashed #cfcdda;
  border-radius: 12px;
  background: #fcfcfe;
}

.dropzone-icon {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-radius: 14px;
}

.source-dropzone h3 {
  margin-bottom: 7px;
  font-size: 14px;
}

.source-dropzone p {
  max-width: 460px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

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

.source-stat {
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.source-stat strong,
.source-stat span {
  display: block;
}

.source-stat strong {
  font-size: 18px;
}

.source-stat span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 9px;
}

.file-list {
  display: grid;
}

.file-row {
  display: grid;
  grid-template-columns: 32px minmax(190px, 1fr) 110px 108px 58px 28px;
  gap: 10px;
  align-items: center;
  min-height: 54px;
  border-top: 1px solid var(--line);
  font-size: 10px;
}

.file-type-icon {
  width: 28px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  color: #2e6fb8;
  background: #eaf3ff;
}

.file-name {
  min-width: 0;
}

.file-name strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 10px;
}

.file-name span {
  display: block;
  margin-top: 3px;
  color: var(--muted-2);
  font-size: 8px;
}

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

.warning-card {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
}

.warning-card__icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: var(--warning);
  background: var(--warning-soft);
  border-radius: 8px;
}

.warning-card--danger .warning-card__icon {
  color: var(--danger);
  background: var(--danger-soft);
}

.warning-card--info .warning-card__icon {
  color: var(--info);
  background: var(--info-soft);
}

.warning-card strong {
  display: block;
  margin-bottom: 3px;
  font-size: 10px;
}

.warning-card p {
  margin: 0;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.45;
}

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

.language-card {
  display: grid;
  grid-template-columns: 42px minmax(140px, 1fr) 110px 125px;
  gap: 12px;
  align-items: center;
  min-height: 78px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.language-flag {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-2);
  font-weight: 750;
  font-size: 10px;
}

.language-info strong,
.language-info span {
  display: block;
}

.language-info strong {
  font-size: 11px;
}

.language-info span {
  margin-top: 4px;
  color: var(--muted-2);
  font-size: 9px;
}

.publish-summary {
  display: grid;
  gap: 11px;
}

.summary-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
}

.summary-line:last-child {
  border-bottom: 0;
}

.summary-line span {
  color: var(--muted);
}

.inbox-layout {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  height: calc(100vh - var(--header) - 56px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: white;
}

.inbox-list-panel {
  border-inline-end: 1px solid var(--line);
  overflow-y: auto;
}

.inbox-filters {
  display: flex;
  gap: 6px;
  padding: 12px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
}

.filter-chip {
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  color: var(--muted);
  white-space: nowrap;
  font-size: 9px;
  cursor: pointer;
}

.filter-chip.active {
  color: var(--primary-strong);
  border-color: #d8d3ff;
  background: var(--primary-soft);
  font-weight: 650;
}

.inbox-item {
  width: 100%;
  display: grid;
  grid-template-columns: 9px 1fr;
  gap: 9px;
  padding: 15px 14px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: white;
  cursor: pointer;
  text-align: start;
}

.inbox-item:hover {
  background: #fafafd;
}

.inbox-item.active {
  background: var(--primary-mist);
}

.inbox-item-dot {
  width: 7px;
  height: 7px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--primary);
}

.inbox-item-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.inbox-item-head strong {
  font-size: 10px;
}

.inbox-item-head time {
  color: var(--muted-2);
  font-size: 8px;
}

.inbox-item p {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 6px 0 8px;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.45;
}

.inbox-item-foot {
  display: flex;
  gap: 5px;
}

.question-panel {
  min-width: 0;
  overflow-y: auto;
  background: #fcfcfe;
}

.question-topbar {
  position: sticky;
  z-index: 5;
  top: 0;
  min-height: 61px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: white;
  border-bottom: 1px solid var(--line);
}

.question-topbar__title {
  min-width: 0;
  flex: 1;
}

.question-topbar__title strong,
.question-topbar__title span {
  display: block;
}

.question-topbar__title strong {
  font-size: 11px;
}

.question-topbar__title span {
  margin-top: 3px;
  color: var(--muted-2);
  font-size: 9px;
}

.question-content {
  width: min(760px, calc(100% - 40px));
  margin: 20px auto 50px;
}

.context-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 13px;
  background: #f4f3ff;
  color: var(--primary-strong);
  border: 1px solid #dedaff;
  border-radius: 9px;
  font-size: 9px;
}

.thread {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.thread-message {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 11px;
}

.thread-message__body {
  min-width: 0;
}

.thread-message__meta {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 7px;
}

.thread-message__meta strong {
  font-size: 10px;
}

.thread-message__meta time {
  color: var(--muted-2);
  font-size: 8px;
}

.message-bubble {
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 4px 12px 12px 12px;
  background: white;
  font-size: 11px;
  line-height: 1.65;
}

[dir="rtl"] .message-bubble {
  border-radius: 12px 4px 12px 12px;
}

.message-bubble--ai {
  border-color: #ddd9ff;
  background: var(--primary-mist);
}

.message-bubble--teacher {
  border-color: #d6eee6;
  background: #f2fbf8;
}

.translation-box {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(120,120,140,.18);
}

.translation-label {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 5px;
  color: var(--primary-strong);
  font-size: 8px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.question-note {
  margin-top: 9px;
  padding: 10px 12px;
  border-inline-start: 3px solid var(--warning);
  background: #fff9ee;
  color: #705d39;
  border-radius: 6px;
  font-size: 9px;
  line-height: 1.55;
}

.citation-list {
  display: grid;
  gap: 6px;
  margin-top: 9px;
}

.citation-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 9px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 7px;
  background: white;
  font-size: 8px;
}

.reply-composer {
  margin-top: 22px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: white;
}

.reply-tools {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px;
  border-bottom: 1px solid var(--line);
}

.reply-tools button {
  min-height: 29px;
  padding: 0 8px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 9px;
  cursor: pointer;
}

.reply-tools button:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.reply-tools button.ai {
  color: var(--primary-strong);
  background: var(--primary-mist);
}

.reply-composer textarea {
  width: 100%;
  min-height: 112px;
  padding: 13px;
  border: 0;
  resize: vertical;
  outline: none;
  line-height: 1.55;
}

.reply-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px;
  border-top: 1px solid var(--line);
}

.reply-language {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 8px;
}

.model-hero {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 22px;
  margin-bottom: 18px;
  border: 1px solid #dfdcff;
  background: linear-gradient(120deg, #f5f3ff, #fbfaff);
}

.model-hero__main {
  display: flex;
  align-items: center;
  gap: 15px;
}

.model-hero__icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  color: white;
  background: linear-gradient(145deg, #786bf0, #5345d0);
  border-radius: 14px;
  box-shadow: 0 9px 22px rgba(102,87,232,.23);
}

.model-hero h2 {
  margin-bottom: 5px;
  font-size: 16px;
}

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

.connection-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 7px;
  color: var(--muted);
  font-size: 9px;
}

.connection-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--warning);
  box-shadow: 0 0 0 3px var(--warning-soft);
}

.connection-status.connected::before {
  background: var(--success);
  box-shadow: 0 0 0 3px var(--success-soft);
}

.models-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(330px, .85fr);
  gap: 18px;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
}

.data-table th {
  padding: 10px 12px;
  color: var(--muted-2);
  background: #fafafd;
  border-block: 1px solid var(--line);
  text-align: start;
  font-size: 8px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  white-space: nowrap;
}

.data-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

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

.model-name {
  display: flex;
  align-items: center;
  gap: 8px;
}

.provider-logo {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 8px;
  font-weight: 750;
}

.model-name strong,
.model-name span {
  display: block;
}

.model-name strong { font-size: 9px; }
.model-name span { margin-top: 2px; color: var(--muted-2); font-size: 8px; }

.route-list {
  display: grid;
}

.route-row {
  display: grid;
  grid-template-columns: minmax(110px, 1fr) minmax(120px, 1.1fr) 15px minmax(120px, 1.1fr);
  gap: 8px;
  align-items: center;
  min-height: 59px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.route-row:first-child {
  border-top: 0;
}

.route-task strong,
.route-task span {
  display: block;
}

.route-task strong { font-size: 9px; }
.route-task span { margin-top: 3px; color: var(--muted-2); font-size: 8px; }

.compact-select {
  width: 100%;
  height: 31px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 7px;
  background: white;
  font-size: 8px;
}

.course-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 30px;
  min-height: 250px;
  margin: -28px -32px 24px;
  padding: 42px 44px;
  color: white;
  background:
    radial-gradient(circle at 85% 20%, rgba(255,255,255,.13), transparent 22%),
    linear-gradient(125deg, #25273a 0%, #393d58 62%, #565d80 100%);
}

.course-hero::after {
  content: "";
  position: absolute;
  width: 330px;
  height: 330px;
  inset-inline-end: -50px;
  top: -75px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 50%;
  box-shadow: inset 0 0 0 42px rgba(255,255,255,.025), inset 0 0 0 92px rgba(255,255,255,.018);
}

.course-hero-content {
  position: relative;
  z-index: 1;
}

.course-hero .kicker { color: #aaa4ff; }

.course-hero h1 {
  margin-bottom: 10px;
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -.04em;
}

.course-hero p {
  max-width: 650px;
  color: rgba(255,255,255,.72);
  line-height: 1.65;
}

.course-hero-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 18px;
  color: rgba(255,255,255,.7);
  font-size: 10px;
}

.course-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.course-progress-card {
  position: relative;
  z-index: 1;
  align-self: center;
  padding: 19px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 14px;
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(8px);
}

.progress-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 11px;
  font-size: 10px;
}

.progress-head strong {
  font-size: 20px;
}

.course-progress-card .progress-track {
  background: rgba(255,255,255,.16);
  height: 7px;
}

.course-progress-card .progress-fill {
  background: #a69cff;
}

.course-progress-card p {
  margin: 10px 0 0;
  color: rgba(255,255,255,.62);
  font-size: 9px;
}

.learning-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 18px;
}

.module-list {
  display: grid;
  gap: 11px;
}

.module-card {
  overflow: hidden;
}

.module-card-head {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 15px;
}

.module-number {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 10px;
  font-weight: 750;
}

.module-card-head h3 {
  margin-bottom: 4px;
  font-size: 12px;
}

.module-card-head p {
  margin: 0;
  color: var(--muted-2);
  font-size: 9px;
}

.module-progress {
  min-width: 100px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 9px;
}

.module-lessons {
  border-top: 1px solid var(--line);
}

.lesson-row {
  display: grid;
  grid-template-columns: 26px minmax(150px, 1fr) auto 24px;
  gap: 10px;
  align-items: center;
  min-height: 49px;
  padding: 0 15px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.lesson-row:last-child { border-bottom: 0; }
.lesson-row:hover { background: #fafafd; }

.lesson-type {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: var(--muted);
  background: var(--surface-2);
}

.lesson-type--done {
  color: var(--success);
  background: var(--success-soft);
}

.lesson-row strong { font-size: 10px; }
.lesson-row time { color: var(--muted-2); font-size: 9px; }

.announcement-card {
  padding: 16px;
}

.announcement-head {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 11px;
}

.announcement-head strong { font-size: 10px; }
.announcement-head time { display: block; color: var(--muted-2); font-size: 8px; margin-top: 2px; }

.announcement-card h3 {
  margin-bottom: 7px;
  font-size: 12px;
}

.announcement-card p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.55;
}

.next-task {
  margin-top: 18px;
}

.task-card {
  padding: 16px;
  background: linear-gradient(145deg, #f7f6ff, #fff);
  border-color: #dfdcff;
}

.task-card__head {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.task-card__head .stat-icon { width: 38px; height: 38px; }
.task-card__head strong { display: block; font-size: 10px; }
.task-card__head span { display: block; color: var(--muted-2); font-size: 8px; margin-top: 3px; }

.student-player {
  display: grid;
  grid-template-columns: 270px minmax(520px, 1fr);
  min-height: calc(100vh - var(--header));
  margin: -28px -32px -52px;
  background: #f3f4f7;
}

.player-outline {
  border-inline-end: 1px solid var(--line);
  background: white;
  overflow-y: auto;
}

.player-course-head {
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.player-course-head button {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 15px;
  border: 0;
  background: none;
  color: var(--muted);
  padding: 0;
  font-size: 9px;
  cursor: pointer;
}

.player-course-head strong {
  display: block;
  font-size: 11px;
  line-height: 1.4;
}

.player-course-head span {
  display: block;
  margin-top: 5px;
  color: var(--muted-2);
  font-size: 8px;
}

.outline-module {
  border-bottom: 1px solid var(--line);
}

.outline-module-head {
  padding: 13px 15px;
  background: #fafafd;
}

.outline-module-head strong {
  display: block;
  font-size: 9px;
}

.outline-module-head span {
  display: block;
  margin-top: 4px;
  color: var(--muted-2);
  font-size: 8px;
}

.outline-lesson {
  width: 100%;
  min-height: 44px;
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: center;
  gap: 8px;
  padding: 6px 15px;
  border: 0;
  background: white;
  text-align: start;
  cursor: pointer;
  color: var(--muted);
  font-size: 9px;
}

.outline-lesson:hover { background: #fafafd; }

.outline-lesson.active {
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-inline-start: 3px solid var(--primary);
  padding-inline-start: 12px;
  font-weight: 650;
}

.player-main {
  min-width: 0;
  overflow-y: auto;
}

.player-topbar {
  position: sticky;
  z-index: 10;
  top: 0;
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 24px;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.player-topbar span {
  color: var(--muted);
  font-size: 9px;
}

.player-nav {
  display: flex;
  gap: 7px;
}

.lesson-document {
  width: min(820px, calc(100% - 60px));
  margin: 30px auto 90px;
  padding: 47px 58px 58px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

.lesson-document h1 {
  margin: 7px 0 12px;
  font-size: 29px;
  letter-spacing: -.04em;
}

.lesson-meta {
  display: flex;
  gap: 13px;
  color: var(--muted-2);
  font-size: 9px;
  margin-bottom: 30px;
}

.lesson-document h2 {
  margin: 31px 0 11px;
  font-size: 17px;
  letter-spacing: -.02em;
}

.lesson-document > p {
  color: var(--ink-2);
  line-height: 1.78;
}

.objective-list {
  display: grid;
  gap: 8px;
  margin: 15px 0;
}

.objective-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--ink-2);
  font-size: 11px;
  line-height: 1.55;
}

.objective-check {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  margin-top: 1px;
  color: var(--success);
  background: var(--success-soft);
  border-radius: 50%;
}

.interactive-card {
  margin: 31px 0;
  padding: 20px;
  border: 1px solid #ddd9ff;
  border-radius: 12px;
  background: linear-gradient(145deg, #faf9ff, #f4f2ff);
}

.interactive-card__head {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin-bottom: 16px;
}

.interactive-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: white;
  background: var(--primary);
  border-radius: 10px;
}

.interactive-card h3 {
  margin-bottom: 4px;
  font-size: 12px;
}

.interactive-card__head p {
  margin: 0;
  color: var(--muted);
  font-size: 9px;
}

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

.sort-item {
  display: grid;
  grid-template-columns: 25px 1fr auto;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: white;
}

.sort-item-index {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-radius: 6px;
  font-size: 9px;
  font-weight: 700;
}

.sort-item span { font-size: 10px; }

.sort-controls {
  display: flex;
  gap: 3px;
}

.sort-controls button {
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--muted);
  cursor: pointer;
}

.sort-controls button:hover { color: var(--primary); border-color: #d8d3ff; }

.interactive-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
}

.quiz-result {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--success);
  font-size: 9px;
  font-weight: 650;
}

.flashcard-stage {
  perspective: 1000px;
}

.flashcard {
  position: relative;
  min-height: 210px;
  transform-style: preserve-3d;
  transition: transform .5s ease;
  cursor: pointer;
}

.flashcard.flipped { transform: rotateY(180deg); }

[dir="rtl"] .flashcard.flipped { transform: rotateY(-180deg); }

.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 30px;
  border: 1px solid #d8d3ff;
  border-radius: 14px;
  background: white;
  text-align: center;
}

.flashcard-face--back {
  transform: rotateY(180deg);
  background: linear-gradient(145deg, #6c5de9, #5446ce);
  color: white;
}

[dir="rtl"] .flashcard-face--back { transform: rotateY(-180deg); }

.flashcard-face .eyebrow { margin-bottom: 13px; }
.flashcard-face--back .eyebrow { color: #dcd8ff; }
.flashcard-face h3 { margin-bottom: 8px; font-size: 22px; }
.flashcard-face p { max-width: 480px; margin: 0; color: var(--muted); line-height: 1.6; }
.flashcard-face--back p { color: rgba(255,255,255,.82); }

.flashcard-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.tutor-launcher {
  position: fixed;
  z-index: 52;
  inset-inline-end: 27px;
  bottom: 25px;
  height: 50px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 17px 0 10px;
  border: 0;
  border-radius: 999px;
  color: white;
  background: linear-gradient(135deg, #7668ee, #5345d0);
  box-shadow: 0 13px 34px rgba(72, 58, 190, .34);
  cursor: pointer;
  font-size: 11px;
  font-weight: 650;
}

[dir="rtl"] .tutor-launcher { padding: 0 10px 0 17px; }

.tutor-launcher__icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,.16);
}

.tutor-launcher::before {
  content: "";
  position: absolute;
  inset: -5px;
  border: 1px solid rgba(102,87,232,.2);
  border-radius: inherit;
  animation: pulse 2.2s ease-out infinite;
}

@keyframes pulse {
  0% { transform: scale(.96); opacity: .7; }
  70% { transform: scale(1.12); opacity: 0; }
  100% { transform: scale(1.12); opacity: 0; }
}

.scrim {
  position: fixed;
  z-index: 60;
  inset: 0;
  background: rgba(23, 22, 36, .32);
  backdrop-filter: blur(2px);
  animation: fade-in .18s ease;
}

@keyframes fade-in { from { opacity: 0; } }

.tutor-drawer {
  position: fixed;
  z-index: 70;
  inset-block: 0;
  inset-inline-end: 0;
  width: min(430px, 100vw);
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: white;
  box-shadow: var(--shadow-lg);
  animation: drawer-in .28s ease;
}

@keyframes drawer-in {
  from { transform: translateX(100%); }
}

[dir="rtl"] .tutor-drawer { animation-name: drawer-in-rtl; }
@keyframes drawer-in-rtl { from { transform: translateX(-100%); } }

.tutor-head {
  padding: 17px;
  color: white;
  background: linear-gradient(135deg, #6e60eb, #5142ca);
}

.tutor-head__top {
  display: flex;
  align-items: center;
  gap: 11px;
}

.tutor-avatar {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(255,255,255,.14);
}

.tutor-head__title {
  flex: 1;
}

.tutor-head__title strong,
.tutor-head__title span {
  display: block;
}

.tutor-head__title strong { font-size: 12px; }
.tutor-head__title span { margin-top: 3px; color: rgba(255,255,255,.7); font-size: 9px; }

.tutor-head button {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 8px;
  background: rgba(255,255,255,.1);
  color: white;
  cursor: pointer;
}

.tutor-context {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 12px;
  padding: 8px 9px;
  border-radius: 8px;
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.78);
  font-size: 8px;
}

.tutor-messages {
  min-height: 0;
  overflow-y: auto;
  padding: 17px;
  background: #fafafd;
}

.tutor-welcome {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: white;
  color: var(--ink-2);
  font-size: 10px;
  line-height: 1.6;
}

.quick-prompts {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 12px 0 18px;
}

.quick-prompt {
  min-height: 29px;
  padding: 0 10px;
  border: 1px solid #ddd9ff;
  border-radius: 999px;
  color: var(--primary-strong);
  background: var(--primary-mist);
  font-size: 8px;
  cursor: pointer;
}

.tutor-message {
  display: grid;
  gap: 6px;
  margin: 13px 0;
}

.tutor-message--user {
  justify-items: end;
}

.tutor-bubble {
  max-width: 90%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 4px 12px 12px 12px;
  background: white;
  font-size: 10px;
  line-height: 1.62;
}

.tutor-message--user .tutor-bubble {
  border-color: var(--primary);
  border-radius: 12px 4px 12px 12px;
  background: var(--primary);
  color: white;
}

[dir="rtl"] .tutor-bubble { border-radius: 12px 4px 12px 12px; }
[dir="rtl"] .tutor-message--user .tutor-bubble { border-radius: 4px 12px 12px 12px; }

.tutor-citations {
  display: grid;
  gap: 5px;
  max-width: 90%;
}

.tutor-citation {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: white;
  color: var(--muted);
  font-size: 8px;
}

.tutor-feedback {
  display: flex;
  align-items: center;
  gap: 4px;
  max-width: 90%;
}

.tutor-feedback button {
  min-height: 27px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--muted);
  font-size: 8px;
  cursor: pointer;
}

.tutor-feedback button:hover { color: var(--primary); border-color: #d8d3ff; }
.tutor-feedback button.ask-teacher { margin-inline-start: auto; color: var(--primary-strong); border-color: #ddd9ff; background: var(--primary-mist); }

.tutor-thinking {
  display: flex;
  gap: 4px;
  padding: 12px;
  width: 48px;
  border: 1px solid var(--line);
  border-radius: 4px 12px 12px 12px;
  background: white;
}

.tutor-thinking span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--muted-2);
  animation: bounce 1.1s infinite ease-in-out;
}

.tutor-thinking span:nth-child(2) { animation-delay: .12s; }
.tutor-thinking span:nth-child(3) { animation-delay: .24s; }
@keyframes bounce { 0%, 60%, 100% { transform: translateY(0); opacity: .5; } 30% { transform: translateY(-4px); opacity: 1; } }

.tutor-compose {
  padding: 12px;
  border-top: 1px solid var(--line);
  background: white;
}

.tutor-compose-box {
  display: grid;
  grid-template-columns: 1fr 34px;
  align-items: end;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
}

.tutor-compose textarea {
  min-height: 42px;
  max-height: 110px;
  padding: 5px;
  border: 0;
  outline: none;
  resize: none;
  line-height: 1.45;
  font-size: 10px;
}

.tutor-send {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 8px;
  color: white;
  background: var(--primary);
  cursor: pointer;
}

.tutor-disclaimer {
  margin: 7px 0 0;
  color: var(--muted-2);
  text-align: center;
  font-size: 7px;
}

/* Multi-course learning catalog */
.learning-catalog { display: grid; gap: 22px; }

.learning-course-card {
  display: grid;
  grid-template-columns: minmax(280px, .72fr) minmax(420px, 1.28fr);
  overflow: hidden;
}

.learning-course-summary {
  padding: 22px;
  border-inline-end: 1px solid var(--line);
  background: linear-gradient(145deg, #fbfaff, #f4f2ff);
}

.learning-course-summary .course-cover,
.course-catalog-card .course-cover {
  min-height: 112px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: white;
  background: linear-gradient(135deg, #7869ef, #4f42c5);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .06em;
}

.learning-course-summary .card-body,
.course-catalog-card .card-body { padding: 18px 0 0; }
.learning-course-summary .button { margin-top: 18px; }
.learning-course-summary h2,
.course-catalog-card h2 { margin: 12px 0 8px; }
.learning-course-summary p,
.course-catalog-card p { color: var(--muted); line-height: 1.6; }
.learning-module-list { padding: 12px 18px; }
.learning-module { border-bottom: 1px solid var(--line); }
.learning-module:last-child { border-bottom: 0; }

.learning-module summary {
  min-height: 64px;
  display: grid;
  grid-template-columns: 40px 1fr 16px;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

.learning-module summary::-webkit-details-marker { display: none; }
.learning-module summary strong,
.learning-module summary small { display: block; }
.learning-module summary small { margin-top: 3px; color: var(--muted-2); }

.learning-lesson {
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto 16px;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 6px 14px;
  border: 0;
  border-radius: 9px;
  color: var(--ink-2);
  background: transparent;
  text-align: start;
  cursor: pointer;
}

.learning-lesson:hover { background: var(--surface-2); }
.learning-lesson.is-done > span { color: var(--success); }
.learning-lesson time { color: var(--muted-2); }

.course-catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.course-catalog-card { overflow: hidden; }
.course-catalog-card .course-cover { border-radius: 0; }
.course-catalog-card .card-body { padding: 20px; }
.course-provenance { display: grid; gap: 7px; margin: 16px 0; color: var(--muted); font-size: 10px; }
.course-provenance span { display: flex; align-items: center; gap: 7px; }

.generation-model-picker {
  max-width: 620px;
  display: grid;
  gap: 6px;
  margin: 18px 0;
  color: var(--ink-2);
  font-size: 10px;
}

.generation-model-picker small { color: var(--muted-2); }

/* Dedicated lesson player */
.student-player {
  height: calc(100dvh - var(--header));
  min-height: 0;
  margin: 0;
  overflow: hidden;
}

.player-outline {
  min-width: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.player-outline .tree-lesson { grid-template-columns: 16px minmax(0, 1fr) auto; }

.player-main {
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
}

.player-topbar { position: relative; top: auto; }

.player-scroll {
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
}

.player-outline-toggle,
.player-outline-scrim { display: none; }

.lesson-footer-nav,
.assessment-submit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
}

.course-figure { direction: ltr; }
.course-figure img { width: auto; height: auto; }

/* Learner assessment and model grading */
.assessment-question > strong { display: block; line-height: 1.55; }
.assessment-question .textarea { width: 100%; min-height: 96px; margin-top: 12px; }
.answer-options label { align-items: flex-start; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px; cursor: pointer; }
.answer-options label:has(input:checked) { border-color: var(--primary); background: var(--primary-mist); }
.ordering-answers { display: grid; gap: 9px; margin-top: 12px; }
.ordering-answer { display: grid; grid-template-columns: 58px 1fr; align-items: center; gap: 10px; }
.ordering-answer select { width: 58px; min-height: 36px; border: 1px solid var(--line-strong); border-radius: 8px; background: white; }
.grading-feedback { margin-top: 12px; padding: 12px; border-inline-start: 3px solid var(--warning); border-radius: 8px; background: #fff9ed; }
.grading-feedback.is-correct { border-color: var(--success); background: var(--success-soft); }
.grading-feedback p { margin: 5px 0 0; line-height: 1.55; }
.assessment-result { flex: 1; display: flex; align-items: center; gap: 10px; padding: 13px 15px; border-radius: 10px; color: var(--success); background: var(--success-soft); }
.assessment-result.is-grading { color: var(--primary-strong); background: var(--primary-mist); }
.assessment-result.is-error { flex-wrap: wrap; color: #b42318; background: #fff1f0; }

/* Tutor is a true viewport-height panel with a stable composer. */
.tutor-drawer {
  height: 100dvh;
  max-height: 100dvh;
  min-width: 0;
  overflow: hidden;
}

.tutor-messages,
.tutor-bubble,
.tutor-context,
.tutor-welcome { overflow-wrap: anywhere; }

.tutor-compose {
  padding: 12px max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
}

.tutor-compose-box { min-width: 0; }
.tutor-compose-box textarea { width: 100%; min-width: 0; }
.tutor-disclaimer { margin: 7px 3px 0; line-height: 1.4; }

/* Selective Arabic RTL: textual regions follow Arabic while media, codes and brands stay stable. */
[dir="rtl"] .brand-lockup,
[dir="rtl"] .course-cover,
[dir="rtl"] .course-figure,
[dir="rtl"] code,
[dir="rtl"] bdi,
[dir="rtl"] [dir="ltr"] { direction: ltr; unicode-bidi: isolate; }

[dir="rtl"] .course-figure img,
[dir="rtl"] .brand-mark,
[dir="rtl"] .icon:not(.rtl-mirror) { transform: none; }

[dir="rtl"] .learning-lesson > .icon:last-child,
[dir="rtl"] .learning-course-summary .button .icon:last-child,
[dir="rtl"] .course-catalog-card .button .icon:last-child,
[dir="rtl"] .player-nav .button:last-child .icon:last-child,
[dir="rtl"] .lesson-footer-nav .button:last-child .icon:last-child { transform: scaleX(-1); }

[dir="rtl"] .lesson-document,
[dir="rtl"] .course-rich-text,
[dir="rtl"] .tutor-bubble { text-align: start; }

.modal-wrap {
  position: fixed;
  z-index: 90;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(23, 22, 36, .42);
  backdrop-filter: blur(3px);
  animation: fade-in .18s ease;
}

.modal {
  width: min(560px, 100%);
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: white;
  box-shadow: var(--shadow-lg);
  animation: modal-in .2s ease;
}

@keyframes modal-in { from { transform: translateY(8px) scale(.985); opacity: 0; } }

.modal-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 19px 20px 15px;
  border-bottom: 1px solid var(--line);
}

.modal-head__icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 10px;
  color: var(--primary-strong);
  background: var(--primary-soft);
}

.modal-head__title { flex: 1; }
.modal-head h2 { margin-bottom: 4px; font-size: 15px; }
.modal-head p { margin: 0; color: var(--muted); font-size: 9px; line-height: 1.45; }

.modal-close {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--muted);
  cursor: pointer;
}

.modal-body { padding: 18px 20px; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 13px 20px;
  border-top: 1px solid var(--line);
  background: #fafafd;
}

.context-preview {
  padding: 12px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fafafd;
}

.context-preview__label {
  margin-bottom: 6px;
  color: var(--muted-2);
  font-size: 8px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.context-preview p {
  margin: 0;
  color: var(--ink-2);
  font-size: 10px;
  line-height: 1.55;
}

.upload-progress {
  display: grid;
  gap: 10px;
}

.upload-progress-row {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 9px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.upload-progress-row strong,
.upload-progress-row span { display: block; }
.upload-progress-row strong { max-width: 340px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 9px; }
.upload-progress-row span { margin-top: 3px; color: var(--muted-2); font-size: 8px; }

.empty-state {
  min-height: 330px;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 30px;
  text-align: center;
}

.empty-state__icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  border-radius: 15px;
  color: var(--primary-strong);
  background: var(--primary-soft);
}

.empty-state h3 { margin-bottom: 7px; font-size: 14px; }
.empty-state p { max-width: 380px; margin-bottom: 16px; color: var(--muted); font-size: 10px; line-height: 1.55; }

.simple-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  padding: 19px;
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  margin-bottom: 15px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-radius: 10px;
}

.feature-card h3 { margin-bottom: 7px; font-size: 12px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.55; }

.notification-list {
  display: grid;
  gap: 9px;
}

.notification-item {
  display: grid;
  grid-template-columns: 40px minmax(0,1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: white;
}

.notification-item.unread { border-color: #dedaff; background: var(--primary-mist); }

.notification-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-radius: 10px;
}

.notification-item strong,
.notification-item span { display: block; }
.notification-item strong { font-size: 10px; }
.notification-item span { margin-top: 4px; color: var(--muted); font-size: 9px; }
.notification-item time { color: var(--muted-2); font-size: 8px; }

.assignment-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
}

.checklist {
  display: grid;
  gap: 9px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 10px;
  line-height: 1.5;
}

.report-chart {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: end;
  gap: 12px;
  height: 210px;
  padding: 22px 16px 12px;
  border-bottom: 1px solid var(--line);
}

.bar-group {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  gap: 7px;
}

.bar {
  width: min(36px, 75%);
  border-radius: 7px 7px 2px 2px;
  background: linear-gradient(180deg, #8175ef, #6657e8);
}

.bar-group span { color: var(--muted-2); font-size: 8px; }

#toast-region {
  position: fixed;
  z-index: 120;
  inset-inline-end: 22px;
  top: 84px;
  width: min(360px, calc(100vw - 44px));
  display: grid;
  gap: 8px;
}

.toast {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  align-items: center;
  gap: 9px;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: white;
  box-shadow: var(--shadow-md);
  animation: toast-in .25s ease;
}

@keyframes toast-in { from { transform: translateY(-6px); opacity: 0; } }

.toast-icon {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--success);
  background: var(--success-soft);
}

.toast--warning .toast-icon { color: var(--warning); background: var(--warning-soft); }
.toast--error .toast-icon { color: var(--danger); background: var(--danger-soft); }

.toast strong,
.toast span { display: block; }
.toast strong { font-size: 10px; }
.toast span { margin-top: 3px; color: var(--muted); font-size: 8px; line-height: 1.35; }

.toast button {
  border: 0;
  background: transparent;
  color: var(--muted-2);
  cursor: pointer;
}

.skeleton {
  position: relative;
  overflow: hidden;
  background: #ededf3;
  border-radius: 7px;
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.7), transparent);
  animation: shimmer 1.35s infinite;
}

@keyframes shimmer { to { transform: translateX(100%); } }

.mobile-only { display: none; }

@media (max-width: 1180px) {
  :root { --sidebar: 210px; }
  .search-box { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .studio-shell { grid-template-columns: 220px minmax(500px, 1fr); }
  .studio-panel--inspector { display: none; }
  .course-row { grid-template-columns: 50px minmax(160px, 1fr) 90px 78px 30px; }
  .course-row .course-meta-label:nth-of-type(3) { display: none; }
}

@media (max-width: 900px) {
  :root { --sidebar: 0px; }
  .sidebar { transform: translateX(-100%); width: 240px; box-shadow: var(--shadow-lg); transition: transform .2s ease; }
  [dir="rtl"] .sidebar { transform: translateX(100%); }
  .app-shell.mobile-nav-open .sidebar { transform: translateX(0); }
  .topbar { inset-inline-start: 0; padding: 0 16px; }
  .top-action.mobile-menu { display: inline-grid; }
  .topbar-title { min-width: 0; flex: 1; }
  .role-switcher .top-action span,
  .locale-switcher .top-action span { display: none; }
  .page-content { padding: 22px 18px 45px; }
  .hero-grid,
  .dashboard-grid,
  .models-layout,
  .learning-grid,
  .sources-layout,
  .publish-layout,
  .assignment-layout { grid-template-columns: 1fr; }
  .simple-grid { grid-template-columns: 1fr 1fr; }
  .course-hero { margin: -22px -18px 22px; grid-template-columns: 1fr; padding: 32px 25px; }
  .course-progress-card { max-width: 420px; }
  .learning-course-card { grid-template-columns: 1fr; }
  .learning-course-summary { border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .student-player { height: calc(100dvh - var(--header)); margin: 0; grid-template-columns: 1fr; }
  .player-outline {
    position: fixed;
    z-index: 55;
    inset-block: var(--header) 0;
    inset-inline-start: 0;
    display: block;
    width: min(330px, 88vw);
    transform: translateX(-105%);
    transition: transform .2s ease;
    box-shadow: var(--shadow-lg);
  }
  [dir="rtl"] .player-outline { transform: translateX(105%); }
  .student-player.outline-open .player-outline { transform: translateX(0); }
  .player-outline-toggle { display: inline-grid; }
  .player-outline-scrim {
    position: fixed;
    z-index: 54;
    inset: var(--header) 0 0;
    width: 100%;
    border: 0;
    background: rgba(23, 22, 36, .34);
  }
  .student-player.outline-open .player-outline-scrim { display: block; }
  .inbox-layout { grid-template-columns: 280px 1fr; }
  .studio-shell { grid-template-columns: 1fr; }
  .studio-panel--tree { display: none; }
  .toolbar-title, .toolbar-actions { min-width: 0; }
  .toolbar-tabs { display: none; }
}

@media (max-width: 680px) {
  .topbar-title span { display: none; }
  .top-action--reset { display: none; }
  .page-heading { flex-direction: column; }
  .stats-grid,
  .simple-grid { grid-template-columns: 1fr; }
  .welcome-card { padding: 24px; }
  .welcome-card h1 { font-size: 24px; }
  .course-row { grid-template-columns: 50px 1fr 30px; }
  .course-row > :not(.course-thumb):not(.course-main):not(:last-child) { display: none; }
  .source-summary { grid-template-columns: repeat(2, 1fr); }
  .file-row { grid-template-columns: 30px 1fr 28px; }
  .file-row > :not(.file-type-icon):not(.file-name):not(:last-child) { display: none; }
  .language-card { grid-template-columns: 38px 1fr; }
  .language-card > :nth-last-child(-n+2) { grid-column: 2; }
  .inbox-layout { grid-template-columns: 1fr; height: auto; }
  .inbox-list-panel { max-height: 330px; border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .question-panel { min-height: 620px; }
  .question-content { width: calc(100% - 24px); }
  .model-hero { grid-template-columns: 1fr; }
  .model-hero__actions { justify-self: start; }
  .route-row { grid-template-columns: 1fr; padding: 12px 0; }
  .route-row > .icon { display: none; }
  .lesson-document { width: calc(100% - 22px); padding: 31px 22px 40px; }
  .process-steps { grid-template-columns: 1fr; }
  .process-step:not(:last-child)::after { display: none; }
  .student-player { min-height: 0; }
  .player-topbar { padding: 8px 12px; }
  .player-topbar > span { display: none; }
  .player-nav .button { padding-inline: 9px; }
  .assessment-submit-row { align-items: stretch; flex-direction: column; }
  .assessment-submit-row .button { width: 100%; justify-content: center; }
  .tutor-drawer { width: 100vw; }
  .tutor-launcher { width: 50px; padding: 0; justify-content: center; }
  .tutor-launcher > span:last-child { display: none; }
  .toolbar { overflow-x: auto; }
  .toolbar-title { min-width: 190px; }
  .editor-canvas { padding: 35px 25px 55px; }
  .studio-canvas-wrap { padding: 15px 12px 55px; }
  .modal-wrap { padding: 10px; }
}

/* ── Teaching timeline ── */
.teaching-timeline { display: flex; flex-direction: column; gap: 0; position: relative; padding-inline-start: 18px; }
.teaching-timeline::before { content: ""; position: absolute; inset-inline-start: 0; top: 4px; bottom: 4px; width: 2px; background: var(--line); border-radius: 1px; }
.timeline-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; position: relative; }
.timeline-item::before { content: ""; position: absolute; inset-inline-start: -22px; top: 50%; transform: translateY(-50%); width: 8px; height: 8px; border-radius: 50%; background: var(--primary); border: 2px solid #fff; }
.timeline-item:hover { background: var(--surface-2); }
.timeline-day { font-size: 11px; font-weight: 700; color: var(--muted-2); min-width: 36px; text-transform: uppercase; }
.timeline-desc { flex: 1; font-size: 13px; color: var(--ink-2); font-weight: 500; }

/* ── Due urgency ── */
.due-overdue { color: var(--danger) !important; font-weight: 700; }
.due-today { color: var(--danger) !important; font-weight: 700; }
.due-soon { color: var(--warning) !important; font-weight: 600; }
.due-urgency-label { font-size: 11px; font-weight: 600; margin-inline-start: 4px; }
.due-countdown { font-size: 10px; color: var(--muted-2); margin-inline-start: 6px; }

/* ── File list (assignment upload) ── */
.file-list { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.file-list li { display: flex; align-items: center; gap: 6px; font-size: 12px; padding: 4px 8px; background: var(--surface-2); border-radius: 6px; }
.file-list .file-icon { color: var(--muted); display: grid; place-items: center; }
.file-list bdi { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-remove { border: none; background: none; color: var(--muted); cursor: pointer; padding: 2px; border-radius: 4px; display: grid; place-items: center; }
.file-remove:hover { color: var(--danger); background: var(--danger-soft); }

/* ── Inline upload (task item 4) ── */
.checklist-item--upload { flex-direction: column; align-items: flex-start !important; gap: 4px; }
.inline-upload { margin-inline-start: 24px; display: flex; flex-direction: column; gap: 6px; }
.inline-upload .button { align-self: flex-start; }

/* ── Assignment bottom actions ── */
.assignment-actions-bottom { display: flex; align-items: center; gap: 12px; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }
.draft-indicator { font-size: 11px; color: var(--success); font-weight: 600; }

/* ── Attempt history ── */
.attempt-history { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); }
.attempt-history h4 { font-size: 11px; color: var(--muted); margin-bottom: 8px; font-weight: 600; text-transform: uppercase; }
.attempt-entry { display: flex; align-items: center; gap: 8px; font-size: 12px; padding: 5px 0; }
.attempt-index { font-weight: 700; color: var(--muted); min-width: 20px; }
.attempt-time { flex: 1; color: var(--muted-2); font-size: 11px; }

/* ── File size note ── */
.file-size-note { color: var(--muted-2); font-style: italic; }

/* ── Assessment preview (teacher home) ── */
.assessment-preview { display: grid; gap: 12px; }
.assessment-preview-item { display: flex; align-items: center; gap: 12px; padding: 8px 0; }
.assessment-preview-item + .assessment-preview-item { border-top: 1px solid var(--line); }
.assessment-preview-num { width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center; font-size: 15px; font-weight: 800; flex-shrink: 0; }
.assessment-preview-num--purple { background: var(--primary-soft); color: var(--primary-strong); }
.assessment-preview-num--orange { background: var(--warning-soft); color: var(--warning); }
.assessment-preview-num--blue { background: var(--info-soft); color: var(--info); }
.assessment-preview-label { font-size: 13px; color: var(--ink-2); font-weight: 500; flex: 1; }

/* ── RTL fixes ── */
/* Progress bar fills from right-to-left */
[dir="rtl"] .progress-fill { margin-inline-start: auto; }
/* Button icons stay with text start */
[dir="rtl"] .button { flex-direction: row; }
/* Bidi isolation for mixed content */
[dir="rtl"] bdi, [dir="rtl"] .course-code-mark { unicode-bidi: isolate; }
/* Sidebar wider for Arabic text */
[dir="rtl"] :root { --sidebar: 260px; }
/* Search clear button (if added) on logical end */
[dir="rtl"] .search-clear { margin-inline-start: auto; margin-inline-end: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}