/**
 * Material / Google-style component polish. Design tokens live on :root in app.css.
 * Loaded after app.css. Path layout (.lesson-journey-*) unchanged; colors follow --journey-*.
 */

body.app-shell {
  background: var(--color-bg);
  color: var(--text-primary);
  font-family: "Roboto", "Segoe UI", system-ui, sans-serif;
}

body.app-shell .bambu-ui {
  font-family: "Roboto", "Segoe UI", system-ui, sans-serif;
}

body.app-shell .bambu-shell {
  background: radial-gradient(ellipse 120% 90% at 12% -10%, rgba(26, 115, 232, 0.045) 0%, transparent 50%),
    radial-gradient(ellipse 90% 60% at 100% 0%, rgba(26, 115, 232, 0.03) 0%, transparent 45%);
}

/* Sidebar — Gmail-style rail */
body.app-shell .bambu-nav {
  background: var(--nav-bg);
  border-right: 1px solid var(--border-soft);
  color: #3c4043;
  box-shadow: 1px 0 0 rgba(0, 0, 0, 0.04);
}

body.app-shell .bambu-nav::-webkit-scrollbar-thumb {
  background: rgba(60, 64, 67, 0.22);
}

body.app-shell .bambu-brand__title {
  color: #202124;
  font-family: "Roboto", "Segoe UI", system-ui, sans-serif;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  font-size: 22px;
}

body.app-shell .bambu-brand__sub {
  color: #5f6368;
  letter-spacing: 0.02em;
  text-transform: none;
  font-size: 13px;
  font-weight: 400;
}

body.app-shell .bambu-tab {
  color: #3c4043;
  border-radius: 24px 0 0 24px;
  font-weight: 500;
  font-size: 14px;
}

body.app-shell .bambu-tab__icon {
  background: #f1f3f4;
  border-color: #e8eaed;
}

body.app-shell .bambu-tab.active {
  background: #e8f0fe;
  border-color: transparent;
  color: #1967d2;
  box-shadow: inset 3px 0 0 0 #1a73e8;
}

body.app-shell .bambu-tab.active .bambu-tab__icon {
  background: #d2e3fc;
  border-color: #aecbfa;
}

body.app-shell .bambu-tab:focus-visible {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px #1a73e8;
}

body.app-shell .bambu-avatar {
  background: #e8eaed;
  color: #5f6368;
  border-color: #dadce0;
}

body.app-shell .bambu-upgrade {
  background: #f1f3f4;
  color: #3c4043;
  border-color: #dadce0;
}

body.app-shell .bambu-signout {
  background: #fff;
  color: #1a73e8;
  border: 1px solid #dadce0;
}

body.app-shell .bambu-top {
  background: #fff;
  border: none;
  border-radius: var(--radius-surface-lg, 28px);
  box-shadow: var(--shadow-soft);
}

body.app-shell .bambu-card {
  background: #fff;
  border: none;
  border-radius: var(--radius-surface-lg, 28px);
  box-shadow: var(--shadow-soft);
}

body.app-shell .bambu-action {
  background: var(--panel-alt);
  border-color: #dadce0;
  color: var(--text-primary);
}

body.app-shell .bambu-meter {
  background: #e8eaed;
  border-color: #dadce0;
}

/* Home: catalogue & panels */
body.app-shell .course-catalogue {
  background: #fff;
  border: none;
  border-radius: var(--radius-surface-lg, 28px);
  box-shadow: var(--shadow-soft);
}

body.app-shell .course-catalogue__title {
  color: #5f6368;
  letter-spacing: 0.08em;
}

body.app-shell .course-catalogue-card {
  background: var(--panel-alt);
  border: none;
  border-radius: var(--radius-surface, 24px);
  color: inherit;
}

body.app-shell .course-catalogue-card:hover {
  background: #fff;
  box-shadow: 0 2px 8px rgba(60, 64, 67, 0.06), 0 1px 3px rgba(60, 64, 67, 0.04);
}

body.app-shell .course-catalogue-card:focus-visible {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px #1a73e8;
}

body.app-shell .course-catalogue-card--active {
  border: none;
  background: #e8f0fe;
  box-shadow: 0 1px 3px rgba(26, 115, 232, 0.15);
}

body.app-shell .course-catalogue-card__thumb {
  background: linear-gradient(135deg, #e8f0fe, #fce8e6);
}

body.app-shell .course-catalogue-card__meta {
  color: #5f6368;
}

body.app-shell .course-catalogue-card__progress {
  background: #e8eaed;
}

body.app-shell .course-catalogue-card__cta {
  color: #1a73e8;
}

body.app-shell .academy-panel {
  background: #fff;
  border: none;
  border-radius: var(--radius-surface-lg, 28px);
  box-shadow: var(--shadow-soft);
}

body.app-shell .academy-panel__header {
  color: #3c4043;
}

body.app-shell .academy-back {
  color: #5f6368;
}

body.app-shell .academy-panel__title {
  color: #202124;
  text-shadow: none;
  font-family: "Roboto", "Segoe UI", system-ui, sans-serif;
  font-weight: 400;
}

body.app-shell .academy-progress-meta__label {
  color: #5f6368;
  text-shadow: none;
}

body.app-shell .academy-progress-bar {
  background: #e8eaed;
  border: 1px solid #dadce0;
  box-shadow: none;
}

body.app-shell .academy-lessons {
  background: #fff;
  border: none;
  border-radius: var(--radius-surface-lg, 28px);
  box-shadow: var(--shadow-soft);
}

body.app-shell .academy-lessons__header h2 {
  color: #5f6368;
}

/* Lesson cards — Material elevation */
body.app-shell .lesson-card {
  background: #fff;
  border: none;
  border-radius: var(--radius-surface, 24px);
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.06), 0 1px 3px rgba(60, 64, 67, 0.04);
}

body.app-shell .lesson-card:not(.lesson-card--locked):not(.lesson-card--current):hover {
  box-shadow: 0 2px 8px rgba(60, 64, 67, 0.08), 0 4px 12px 2px rgba(60, 64, 67, 0.04);
}

body.app-shell .lesson-card--simple .lesson-card__title {
  color: #202124;
  font-weight: 500;
}

body.app-shell .lesson-card--simple .lesson-card__copy-inline {
  color: #5f6368;
}

body.app-shell .lesson-card--detailed .lesson-card__title {
  color: #202124;
  font-weight: 500;
}

body.app-shell .lesson-card--detailed .lesson-card__copy {
  color: #5f6368;
}

body.app-shell .lesson-card--locked {
  opacity: 0.72;
  filter: none;
  background: #f1f3f4;
  border-color: #e8eaed;
  box-shadow: none;
}

body.app-shell .lesson-card--locked .lesson-card__title,
body.app-shell .lesson-card--locked .lesson-card__copy,
body.app-shell .lesson-card--locked .lesson-card__copy-inline {
  color: #80868b;
}

body.app-shell .lesson-card__lock-overlay {
  background: rgba(255, 255, 255, 0.72);
}

body.app-shell .lesson-card__lock-icon {
  color: #5f6368;
  filter: none;
}

body.app-shell .lesson-card--current {
  border-color: #aecbfa;
  box-shadow: 0 0 0 1px rgba(26, 115, 232, 0.25), 0 2px 8px rgba(26, 115, 232, 0.12);
}

body.app-shell .lesson-card--completed {
  border: none;
  background: #fff;
  box-shadow:
    inset 3px 0 0 0 #1e8e3e,
    0 1px 2px rgba(60, 64, 67, 0.06),
    0 1px 3px rgba(60, 64, 67, 0.04);
}

body.app-shell .lesson-card--completed .lesson-card__title {
  color: #202124;
}

body.app-shell .lesson-card--completed .lesson-card__copy,
body.app-shell .lesson-card--completed .lesson-card__copy-inline {
  color: #5f6368;
}

/* Pills — flat colored chips */
body.app-shell .lesson-pill--learn {
  background: #e8f0fe;
  border-color: #aecbfa;
  color: #1967d2;
}

body.app-shell .lesson-pill--practice {
  background: #fef7e0;
  border-color: #fdd663;
  color: #b06000;
}

body.app-shell .lesson-pill--project {
  background: #e6f4ea;
  border-color: #81c995;
  color: #137333;
}

body.app-shell .lesson-pill--finale {
  background: #fce8e6;
  border-color: #f9ab9e;
  color: #c5221f;
}

body.app-shell .lesson-pill--locked {
  background: #f1f3f4 !important;
  border-color: #dadce0 !important;
  color: #80868b !important;
}

body.app-shell .lesson-pill:not(.lesson-pill--locked)::after {
  border-right-color: currentColor;
  border-bottom-color: currentColor;
}

/* Journey — layout/wobble lives in app.css; do not override tracks or fills here */
body.app-shell .lesson-journey-node--locked {
  background: #f1f3f4;
  border-color: #dadce0;
  opacity: 0.85;
}

body.app-shell .lesson-journey-node--upcoming {
  border-color: #dadce0;
  background: #fff;
  opacity: 0.9;
}

/* Lesson viewer & shared admin buttons */
body.app-shell .lesson-viewer {
  color: var(--text-primary);
}

body.app-shell .lesson-content {
  color: #202124;
}

body.app-shell .admin-btn--primary {
  background: #1a73e8;
  color: #fff;
  border-radius: 4px;
  font-weight: 500;
  box-shadow: none;
}

body.app-shell .admin-btn--primary:hover {
  background: #1557b0;
}

body.app-shell .admin-btn--secondary {
  background: #fff;
  color: #1a73e8;
  border: 1px solid #dadce0;
  border-radius: 4px;
}

body.app-shell .admin-author-banner {
  background: #e8f0fe;
  border-color: #aecbfa;
  color: #174ea6;
}

body.app-shell .admin-author-banner__title {
  color: #1967d2;
}

body.app-shell .admin-author-banner strong {
  color: #174ea6;
}

body.app-shell .admin-table {
  color: #202124;
}

body.app-shell .admin-modal__content {
  background: #fff;
  color: #202124;
  border: 1px solid #dadce0;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(60, 64, 67, 0.18);
}

body.app-shell .interactive-exercise {
  background: #fff;
  border: 1px solid #e8eaed;
}

body.app-shell .workspace-scenario {
  background: #fafafa;
  border-color: #e8eaed;
}

body.app-shell .bambu-nav-backdrop {
  background: rgba(32, 33, 36, 0.38);
}

body.app-shell .leaderboard-panel {
  background: #fff;
  border: 1px solid var(--border-soft);
  color: #202124;
}

body.app-shell .leaderboard-row {
  border-color: #e8eaed;
}

/* Lesson viewer chrome */
body.app-shell .lesson-viewer__header {
  background: #fff;
  border: 1px solid #e8eaed;
  box-shadow: var(--shadow-soft);
}

body.app-shell .lesson-badge--learn {
  background: #e8f0fe;
  color: #1967d2;
  border-color: #aecbfa;
}

body.app-shell .lesson-badge--practice {
  background: #fef7e0;
  color: #b06000;
  border-color: #fdd663;
}

body.app-shell .lesson-badge--project {
  background: #e6f4ea;
  color: #137333;
  border-color: #ceead6;
}

body.app-shell .lesson-badge--finale {
  background: #fce8e6;
  color: #c5221f;
  border-color: #f9ab9e;
}

body.app-shell .lesson-badge--test {
  background: #f3e8fd;
  color: #7627bb;
  border-color: #d7aefb;
}

body.app-shell .lesson-finale-hint {
  color: #5f6368 !important;
}

body.app-shell .lesson-viewer__intent {
  color: #5f6368;
}

body.app-shell .lesson-reading {
  --lesson-reading-pad-y: clamp(28px, 4vw, 44px);
  --lesson-reading-pad-x: clamp(22px, 3.5vw, 40px);
  background: #fff;
  border: 1px solid #e8eaed;
  box-shadow:
    0 1px 2px rgba(60, 64, 67, 0.08),
    0 14px 36px rgba(60, 64, 67, 0.07);
}

body.app-shell .lesson-reading--simulation {
  background: transparent;
  border: none;
  box-shadow: none;
}

body.app-shell .lesson-block--text {
  color: #3c4043;
}

body.app-shell .lesson-block--heading {
  color: #202124;
  border-bottom-color: #e8eaed;
}

body.app-shell .lesson-page-nav {
  background: #f8f9fa;
  border: 1px solid #e8eaed;
  box-shadow: none;
}

body.app-shell .lesson-page-nav__track {
  background: #e8eaed;
}

body.app-shell .lesson-page-info {
  color: #5f6368;
}

body.app-shell .lesson-page-finish__message {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: #3c4043;
}

body.app-shell .lesson-page-finish__message[data-state="success"] {
  color: #137333;
}

body.app-shell .lesson-page-finish__message[data-state="pending"] {
  color: #5f6368;
}

body.app-shell .lesson-page-finish__message[data-state="error"] {
  color: #c5221f;
}

body.app-shell .lesson-page-finish__message[data-state="muted"] {
  color: #80868b;
}

body.app-shell .lesson-navigation {
  border-top-color: #e8eaed;
}

body.app-shell .project-submission-panel--in-reading {
  background: #fafafa;
  border-color: #e8eaed;
}

body.app-shell .lesson-block--simulation {
  background: #fff;
  border-color: #e8eaed;
  box-shadow: 0 8px 26px rgba(60, 64, 67, 0.1);
}

body.app-shell .lesson-moment {
  background: #fff;
  border-color: #e8eaed;
  box-shadow:
    0 1px 2px rgba(60, 64, 67, 0.08),
    0 12px 32px rgba(60, 64, 67, 0.1);
}

body.app-shell .lesson-moment__head {
  background: linear-gradient(180deg, #f8f9fa 0%, #fff 100%);
  border-bottom-color: #e8eaed;
}

body.app-shell .lesson-moment__eyebrow {
  color: #5f6368;
}

body.app-shell .lesson-moment__meta {
  color: #80868b;
}

body.app-shell .lesson-quiz-prompt {
  color: #202124;
}

body.app-shell .lesson-blitz-status__count {
  color: #5f6368;
}

body.app-shell .lesson-blitz-progress {
  background: #e8eaed;
}

body.app-shell .lesson-blitz-question {
  color: #202124;
}

body.app-shell .lesson-blitz-done__title {
  color: #202124;
}

body.app-shell .lesson-blitz-done__score {
  color: #5f6368;
}

body.app-shell .lesson-blitz-done__score strong {
  color: #202124;
}

body.app-shell .lesson-blitz-empty {
  color: #80868b;
}

body.app-shell .lesson-moment--blitz .quiz-explanation {
  background: #fef7e0;
  border-color: #fdd663;
}

body.app-shell .lesson-moment--blitz .quiz-explanation__title {
  color: #b06000;
}

body.app-shell .lesson-moment--blitz .quiz-explanation__body {
  color: #3c4043;
}

body.app-shell .lesson-blitz-streak {
  color: #e37400;
  background: #fef7e0;
  border-color: #fdd663;
}

body.app-shell .lesson-blitz-feedback--correct {
  background: #e6f4ea;
  border-color: #ceead6;
  color: #137333;
}

body.app-shell .lesson-blitz-feedback--miss {
  background: #fce8e6;
  border-color: #f9ab9e;
  color: #c5221f;
}

body.app-shell .lesson-blitz-complete__ring {
  color: #137333;
  background: linear-gradient(145deg, #e6f4ea 0%, #ceead6 100%);
  border-color: #34a853;
}

body.app-shell .lesson-blitz-done__review-note {
  color: #5f6368;
}

body.app-shell .quiz-option--prior-miss .quiz-option__glyph {
  color: #c5221f;
  border-color: #f9ab9e !important;
  background: #fce8e6 !important;
}

body.app-shell .quiz-option__glyph {
  border-color: #dadce0;
  background: #f8f9fa;
}

body.app-shell .quiz-option--correct .quiz-option__glyph {
  border-color: #137333;
  background: #e6f4ea;
}

body.app-shell .quiz-option--miss .quiz-option__glyph {
  border-color: #c5221f;
  background: #fce8e6;
}

body.app-shell .quiz-explanation {
  background: #fef7e0;
  border-color: #fdd663;
}

body.app-shell .quiz-explanation__title {
  color: #b06000;
}

body.app-shell .quiz-explanation__body {
  color: #3c4043;
}

body.app-shell .workspace-scenario__choice {
  background: #fff;
  border-color: #dadce0;
  color: #202124;
}

body.app-shell .workspace-scenario__choice-index {
  background: #f1f3f4;
  border-color: #dadce0;
  color: #3c4043;
}

body.app-shell .lesson-cta-check {
  box-shadow: 0 4px 12px rgba(26, 115, 232, 0.2);
}

body.app-shell .lesson-viewer__complete-btn--done {
  background: #e6f4ea !important;
  color: #137333 !important;
  border: 1px solid #ceead6 !important;
}

body.app-shell .project-submission-panel {
  background: #fff;
  border-color: #e8eaed;
}

body.app-shell .project-submission-panel__textarea {
  background: var(--panel-alt);
  border-color: #dadce0;
  color: #202124;
}

body.app-shell .lesson-block--text,
body.app-shell .lesson-block--heading,
body.app-shell .lesson-block--text,
body.app-shell .lesson-block--heading {
  color: #202124;
}

body.app-shell .lesson-block--quiz {
  background: #fafafa;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 16px;
}

body.app-shell .quiz-option {
  background: #fff;
  border: 1px solid #dadce0;
  color: #202124;
}

body.app-shell .exercise-editor {
  background: #fff;
  border-color: #e8eaed;
}

body.app-shell .exercise-editor__header {
  background: #f1f3f4;
  color: #5f6368;
}

body.app-shell .exercise-textarea {
  color: #202124;
}

body.app-shell .exercise-preview {
  background: #fafafa;
  border-color: #e8eaed;
}

body.app-shell .exercise-preview__body {
  color: #3c4043;
}

body.app-shell .admin-dashboard__lede {
  color: #5f6368;
}

body.app-shell .admin-dashboard__lede strong {
  color: #174ea6;
  font-weight: 600;
}

body.app-shell .admin-dashboard__panel-kicker {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 4px;
  color: #5f6368;
  opacity: 1;
}

body.app-shell .admin-stat-card {
  background: #fff;
  border: 1px solid #e8eaed;
  color: #202124;
}

body.app-shell .admin-workflow-step {
  background: #fff;
  border: 1px solid #e8eaed;
  color: #202124;
}

body.app-shell .admin-action-card {
  background: #fff;
  border: 1px solid #e8eaed;
  color: #202124;
}

body.app-shell .content-block {
  background: #fff;
  border: 1px solid #e8eaed;
  color: #202124;
}

body.app-shell .content-block:hover {
  border-color: #dadce0;
}

/* Lesson editor blocks: app.css still paints indexes/badges for dark cards — fix on light shell */
body.app-shell .content-block::before {
  background: #dadce0;
}

body.app-shell .content-block--accent-text::before {
  background: rgba(26, 115, 232, 0.55);
}

body.app-shell .content-block--accent-heading::before {
  background: rgba(142, 68, 234, 0.55);
}

body.app-shell .content-block--accent-code::before {
  background: rgba(0, 137, 123, 0.5);
}

body.app-shell .content-block--accent-media::before {
  background: rgba(245, 124, 0, 0.5);
}

body.app-shell .content-block--accent-interactive::before {
  background: rgba(26, 115, 232, 0.45);
}

body.app-shell .content-block--accent-simulation::before {
  background: rgba(0, 121, 107, 0.5);
}

body.app-shell .content-block--accent-quiz::before {
  background: rgba(217, 48, 120, 0.5);
}

body.app-shell .content-block--accent-struct::before {
  background: #9aa0a6;
}

body.app-shell .content-block__index {
  color: #80868b;
}

body.app-shell .content-block__badge {
  background: #e8eaed;
  color: #5f6368;
}

body.app-shell .content-block__drag-handle {
  background: repeating-linear-gradient(
    180deg,
    #dadce0 0 2px,
    transparent 2px 5px
  );
  border-color: #dadce0;
}

body.app-shell .lesson-editor-foot {
  color: #5f6368;
}

body.app-shell .lesson-editor__meta {
  color: #5f6368;
}

body.app-shell .lesson-editor-header-tagline {
  color: #5f6368 !important;
}

/* Profile */
body.app-shell.bambu-profile .profile-shell {
  color: #202124;
}

body.app-shell.bambu-profile .profile-hero {
  background: #fff;
  border: 1px solid #e8eaed;
  color: #202124;
  box-shadow: var(--shadow-soft);
}

body.app-shell.bambu-profile .profile-title,
body.app-shell.bambu-profile #profileName {
  color: #202124;
}

body.app-shell.bambu-profile .profile-avatar-wrap,
body.app-shell.bambu-profile .profile-avatar {
  background: #f1f3f4;
  border-color: #dadce0;
}

body.app-shell.bambu-profile .profile-avatar-fallback {
  color: #5f6368;
}

body.app-shell.bambu-profile .profile-kicker,
body.app-shell.bambu-profile .profile-sub {
  color: #5f6368;
}

body.app-shell.bambu-profile .profile-stat {
  background: #f1f3f4;
  border-color: #e8eaed;
}

body.app-shell.bambu-profile .profile-stat__label {
  color: #5f6368;
}

body.app-shell.bambu-profile .profile-stat__value {
  color: #202124;
}

body.app-shell.bambu-profile .profile-card {
  background: #fff;
  border: 1px solid #e8eaed;
  box-shadow: var(--shadow-soft);
}

body.app-shell.bambu-profile .profile-card__title {
  color: #5f6368;
}

body.app-shell.bambu-profile .profile-card p,
body.app-shell.bambu-profile .profile-card__text {
  color: #3c4043;
}

body.app-shell.bambu-profile .profile-card a:not(.profile-cta) {
  color: #1a73e8;
}

body.app-shell.bambu-profile .profile-card a:not(.profile-cta):hover {
  color: #174ea6;
}

body.app-shell.bambu-profile .profile-tags span {
  background: #f1f3f4;
  border-color: #dadce0;
  color: #5f6368;
}

body.app-shell.bambu-profile .profile-list {
  color: #5f6368;
}

/* WIP / coming-soon */
body.app-shell .wip-card {
  color: #3c4043;
  background: #fff;
  border: 1px solid #e8eaed;
  box-shadow: var(--shadow-soft);
}

body.app-shell .wip-kicker,
body.app-shell .wip-copy {
  color: #5f6368;
}

body.app-shell .wip-title {
  color: #202124;
}

/* Standalone shell (login, auth callback): no sidebar */
body.app-shell:not(:has(> aside.bambu-nav)) {
  background: var(--color-bg) !important;
  color: #202124;
}

body.app-shell:not(:has(> aside.bambu-nav)) .app-header {
  background: #fff;
  border-bottom: 1px solid #dadce0;
}

body.app-shell:not(:has(> aside.bambu-nav)) .app-sub,
body.app-shell:not(:has(> aside.bambu-nav)) .app-user,
body.app-shell:not(:has(> aside.bambu-nav)) .app-muted {
  color: #5f6368;
}

body.app-shell:not(:has(> aside.bambu-nav)) .app-signout {
  background: #fff;
  color: #1a73e8;
  border: 1px solid #dadce0;
}

body.app-shell:not(:has(> aside.bambu-nav)) .app-signout:hover {
  background: #f1f3f4;
}

body.app-shell:not(:has(> aside.bambu-nav)) .app-panel {
  border: 1px solid #dadce0;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.12), 0 2px 6px rgba(60, 64, 67, 0.08);
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-info-pill {
  background: #fff4e5;
  color: #b06000;
  border: 1px solid #f9ab00;
  font-weight: 500;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-info-pill:hover {
  background: #f9ab00;
  color: #3c4043;
  border-color: #e37400;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-info-pill:focus-visible {
  outline: 2px solid #e37400;
  outline-offset: 3px;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-title {
  color: #202124;
  font-weight: 500;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-input {
  border-radius: 8px;
  border: 1px solid #dadce0;
  background: #fff;
  color: #202124;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-input:focus {
  outline: 2px solid rgba(26, 115, 232, 0.35);
  outline-offset: 0;
  border-color: #1a73e8;
  background: #fff;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button {
  border-radius: 8px;
  border: none;
  background: #1a73e8;
  color: #fff;
  font-weight: 500;
  font-size: 16px;
  box-shadow: none;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button:hover {
  background: #1557b0;
  box-shadow: none;
  transform: none;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button:focus-visible {
  outline: 2px solid #174ea6;
  outline-offset: 2px;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button--no-invite {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.35;
  white-space: normal;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button--passkey {
  border-radius: 8px;
  border: 1px solid #dadce0;
  background: #fff;
  color: #1a73e8;
  font-weight: 500;
  font-size: 16px;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button--passkey:hover {
  background: #f1f3f4;
  transform: none;
  box-shadow: none;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-divider {
  color: #5f6368;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-divider::before,
body.app-shell:not(:has(> aside.bambu-nav)) .login-divider::after {
  background: #dadce0;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-hint,
body.app-shell:not(:has(> aside.bambu-nav)) .app-message,
body.app-shell:not(:has(> aside.bambu-nav)) .login-step-label,
body.app-shell:not(:has(> aside.bambu-nav)) .login-mfa-lead {
  color: #5f6368;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-mfa-lead {
  color: #3c4043;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button--ghost {
  border: 1px solid #dadce0;
  background: #fff;
  color: #1a73e8;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-button--ghost:hover {
  background: #f1f3f4;
  transform: none;
  box-shadow: none;
}

body.app-shell:not(:has(> aside.bambu-nav)) .login-panel::before,
body.app-shell:not(:has(> aside.bambu-nav)) .login-panel::after {
  border-color: rgba(26, 115, 232, 0.12);
  opacity: 0.5;
}

/* -------------------------------------------------------------------------- */
/* App shell — readable text & toasts on light canvas (admin + learn)         */
/* -------------------------------------------------------------------------- */

body.app-shell .bambu-toast {
  color: #202124;
  background: #fff;
  border-color: #dadce0;
}

body.app-shell .exercise-toast {
  background: #202124;
  color: #f8f9fa;
  border-color: #3c4043;
}

body.app-shell .exercise-toast[data-state="success"] {
  background: #1e8e3e;
  color: #fff;
  border-color: #137333;
}

body.app-shell .exercise-toast[data-state="error"] {
  background: #c5221f;
  color: #fff;
  border-color: #9e1a18;
}

body.app-shell .exercise-toast[data-state="neutral"] {
  background: #202124;
  color: #f8f9fa;
}

body.app-shell .lesson-editor-toast {
  background: #202124;
  color: #f8f9fa;
  border-color: #3c4043;
}

body.app-shell .lesson-editor-toast--neutral {
  border-color: #5f6368;
  color: #f8f9fa;
}

body.app-shell .admin-dashboard__eyebrow {
  color: #5f6368;
}

body.app-shell .admin-dashboard__section-title,
body.app-shell .admin-dashboard__quick h2 {
  color: #5f6368;
}

body.app-shell .admin-dashboard__section-desc {
  color: #3c4043;
}

body.app-shell .admin-dashboard__workflow {
  background: #f8f9fa;
  border-color: #dadce0;
}

body.app-shell .admin-workflow-step__num {
  background: #e8f0fe;
  color: #1967d2;
}

body.app-shell .admin-workflow-step__title {
  color: #202124;
}

body.app-shell .admin-workflow-step__desc {
  color: #3c4043;
}

body.app-shell .admin-workflow-chevron {
  color: #80868b;
}

body.app-shell .admin-stat-card__label {
  color: #5f6368;
}

body.app-shell .admin-stat-card__value {
  color: #202124;
}

body.app-shell .admin-stat-card__value--loading {
  color: #80868b;
}

body.app-shell .admin-stat-card__hint {
  color: #5f6368;
}

body.app-shell .admin-stat-card__arrow {
  color: #1a73e8;
}

body.app-shell .admin-action-card__title {
  color: #202124;
}

body.app-shell .admin-action-card__desc {
  color: #3c4043;
}

body.app-shell .admin-action-card__icon {
  background: #e8f0fe;
  color: #1967d2;
}

body.app-shell .admin-action-card--secondary {
  background: #fff;
  border-color: #e8eaed;
}

body.app-shell .admin-modal__header {
  border-bottom-color: #e8eaed;
}

body.app-shell .admin-modal__close {
  background: #f1f3f4;
  border-color: #dadce0;
  color: #3c4043;
}

body.app-shell .admin-modal__close:hover {
  background: #e8eaed;
  border-color: #bdc1c6;
  color: #202124;
}

body.app-shell .admin-form__help {
  color: #3c4043;
}

body.app-shell .admin-table thead {
  background: #f8f9fa;
  border-bottom-color: #e8eaed;
}

body.app-shell .admin-table th {
  color: #3c4043;
}

body.app-shell .admin-table td {
  color: #202124;
  border-bottom-color: #e8eaed;
}

body.app-shell .admin-table tbody tr:hover {
  background: #f8f9fa;
}

body.app-shell .admin-filter-label {
  color: #3c4043;
}

body.app-shell .admin-filter-select,
body.app-shell .admin-filter-search {
  border-color: #dadce0;
  background: #fff;
  color: #202124;
}

body.app-shell .content-block-preview {
  color: #3c4043;
  background: #f8f9fa;
  border-color: #e8eaed;
}

body.app-shell .content-block-preview h3 {
  color: #202124;
}

body.app-shell .content-block-preview pre {
  color: #202124;
}

body.app-shell .lesson-editor-type-intro {
  color: #3c4043;
}

body.app-shell .lesson-editor-type-card__title {
  color: #202124;
}

body.app-shell .lesson-editor-type-card__desc {
  color: #5f6368;
}

body.app-shell .lesson-editor-foot {
  border-top-color: #e8eaed;
}

body.app-shell .lesson-editor-foot p {
  color: #3c4043;
}

@media (max-width: 980px) {
  body.app-shell .bambu-nav-toggle {
    border-color: #dadce0;
    background: #fff;
    color: #202124;
  }

  body.app-shell .bambu-nav-toggle:hover {
    background: #f1f3f4;
    border-color: #bdc1c6;
  }
}

/* -------------------------------------------------------------------------- */
/* Admin portal — text/links still using dark-theme (light-on-dark) tokens    */
/* -------------------------------------------------------------------------- */

body.app-shell.admin-portal .admin-lesson-type-legend {
  border-top-color: rgba(26, 115, 232, 0.22);
  color: #3c4043;
}

body.app-shell.admin-portal .admin-lesson-type-legend dt {
  color: #202124;
}

body.app-shell.admin-portal .admin-lesson-type-legend dd {
  color: #5f6368;
}

body.app-shell.admin-portal .admin-link-btn {
  color: #1a73e8;
}

body.app-shell.admin-portal .admin-link-btn:hover {
  color: #174ea6;
}

body.app-shell.admin-portal .admin-link-btn--emph {
  color: #137333;
}

body.app-shell.admin-portal .admin-link-btn--danger {
  color: #c5221f;
}

body.app-shell.admin-portal .admin-form__input,
body.app-shell.admin-portal .admin-form__textarea,
body.app-shell.admin-portal .admin-form__select {
  background: #fff;
  border-color: #dadce0;
  color: #202124;
}

body.app-shell.admin-portal .admin-form__actions {
  border-top-color: #e8eaed;
}

body.app-shell.admin-portal .admin-modal__header {
  border-bottom-color: #e8eaed;
}

body.app-shell.admin-portal .admin-table-container {
  border-color: #e8eaed;
}

body.app-shell.admin-portal .admin-table thead {
  background: #f8f9fa;
  border-bottom-color: #e8eaed;
}

body.app-shell.admin-portal .admin-table td {
  color: #202124;
  border-bottom-color: #e8eaed;
}

body.app-shell.admin-portal .admin-table tbody tr:hover {
  background: #f8f9fa;
}

body.app-shell.admin-portal .admin-filter-select,
body.app-shell.admin-portal .admin-filter-search {
  border-color: #dadce0;
}

body.app-shell.admin-portal .admin-btn--secondary:hover:not(:disabled),
body.app-shell.admin-portal .bambu-btn--secondary:hover:not(:disabled) {
  background: #f1f3f4;
  border-color: #dadce0;
  color: #202124;
}

/* Teacher portal */
body.app-shell.teacher-portal .teacher-muted {
  color: #5f6368;
  font-size: 13px;
}

body.app-shell.teacher-portal .teacher-progress {
  height: 8px;
  background: #e8eaed;
  border-radius: 999px;
  overflow: hidden;
  min-width: 80px;
  display: inline-block;
  vertical-align: middle;
}

body.app-shell.teacher-portal .teacher-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, #1a73e8, #174ea6);
  border-radius: 999px;
}

body.app-shell.teacher-portal .teacher-progress-label {
  margin-left: 8px;
  font-size: 13px;
  color: #3c4043;
}

body.app-shell.teacher-portal .teacher-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 20px 0;
}

body.app-shell.teacher-portal .teacher-summary-card {
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.12);
}

body.app-shell.teacher-portal .teacher-summary-card__label {
  display: block;
  font-size: 12px;
  color: #5f6368;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

body.app-shell.teacher-portal .teacher-summary-card__value {
  font-size: 28px;
  font-weight: 600;
  color: #202124;
}

body.app-shell.teacher-portal .teacher-section-title {
  margin: 24px 0 12px;
  font-size: 16px;
  font-weight: 600;
  color: #202124;
}

body.app-shell.teacher-portal .teacher-insights {
  display: grid;
  gap: 12px;
}

body.app-shell.teacher-portal .teacher-insight {
  background: #fff;
  border-radius: 12px;
  padding: 14px 16px;
  border-left: 4px solid #1a73e8;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}

body.app-shell.teacher-portal .teacher-insight--warning {
  border-left-color: #f9ab00;
}

body.app-shell.teacher-portal .teacher-insight--success {
  border-left-color: #1e8e3e;
}

body.app-shell.teacher-portal .teacher-insight__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
}

body.app-shell.teacher-portal .teacher-insight__detail {
  margin: 0;
  font-size: 14px;
  color: #5f6368;
}

body.app-shell.teacher-portal .teacher-share-row {
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 8px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}

body.app-shell.teacher-portal .teacher-share-row__controls {
  display: flex;
  gap: 8px;
  margin: 8px 0 12px;
}

body.app-shell.teacher-portal .teacher-share-row__controls .admin-form__input {
  flex: 1;
}

body.app-shell.teacher-portal .teacher-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #3c4043;
  margin-bottom: 8px;
}

body.app-shell.teacher-portal .teacher-badge--inactive {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #fce8e6;
  color: #c5221f;
  font-size: 12px;
}

body.app-shell.teacher-portal .teacher-matrix-scroll {
  overflow-x: auto;
  margin-top: 8px;
}

body.app-shell.teacher-portal .teacher-matrix {
  border-collapse: collapse;
  font-size: 12px;
}

body.app-shell.teacher-portal .teacher-matrix th,
body.app-shell.teacher-portal .teacher-matrix td {
  border: 1px solid #e8eaed;
  padding: 6px 8px;
  text-align: center;
}

body.app-shell.teacher-portal .teacher-matrix-cell {
  width: 28px;
  height: 28px;
}

body.app-shell.teacher-portal .teacher-matrix-cell--done {
  background: #ceead6;
}

body.app-shell.teacher-portal .teacher-matrix-cell--active {
  background: #d2e3fc;
}

body.app-shell.teacher-portal .teacher-matrix-cell--pending {
  background: #f1f3f4;
}

body.app-shell .bambu-tab--teacher {
  width: 100%;
}

/* Teacher live session controls */
body.app-shell.teacher-portal .teacher-session-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 14px 16px;
  background: #f8f9fa;
  border: 1px solid #e8eaed;
  border-radius: 12px;
}

body.app-shell.teacher-portal .teacher-session-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: #fef7e0;
  color: #b06000;
}

body.app-shell.teacher-portal .teacher-session-badge[data-status="active"] {
  background: #e6f4ea;
  color: #137333;
}

body.app-shell.teacher-portal .teacher-session-hint {
  flex: 1 1 100%;
  margin: 0;
  font-size: 13px;
  color: #5f6368;
}

body.app-shell.teacher-portal .teacher-danger-row {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #e8eaed;
}

body.app-shell.teacher-portal .teacher-danger-row .teacher-muted {
  margin: 8px 0 0;
  font-size: 13px;
}

body.app-shell.teacher-portal .teacher-row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

body.app-shell.teacher-portal .bambu-btn--danger {
  background: #fff;
  color: #c5221f;
  border: 1px solid #f9ab9e;
}

body.app-shell.teacher-portal .bambu-btn--danger:hover:not(:disabled) {
  background: #fce8e6;
  border-color: #f9ab9e;
  color: #b31412;
}

/* Live class student shell — no sidebar, focused lesson mode */
body.classroom-student-shell {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #f8f9fa 0%, #ffffff 40%);
  color: #202124;
  font-family: 'Roboto', system-ui, sans-serif;
}

body.classroom-student-shell--lesson {
  background: #fff;
}

.classroom-student-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid #e8eaed;
  background: #fff;
}

.classroom-student-header__brand {
  font-size: 14px;
  font-weight: 500;
  color: #5f6368;
  letter-spacing: 0.02em;
}

.classroom-student-header__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  gap: 2px;
}

.classroom-student-header__sub {
  font-size: 13px;
  color: #5f6368;
}

.classroom-student-header--lesson {
  position: sticky;
  top: 0;
  z-index: 20;
}

.classroom-student-back {
  color: #1a73e8;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

.classroom-student-back:hover {
  text-decoration: underline;
}

.classroom-student-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.classroom-student-waiting {
  text-align: center;
  padding: 48px 24px;
}

.classroom-student-waiting__pulse {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: #e8f0fe;
  position: relative;
}

.classroom-student-waiting__pulse::after {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid #1a73e8;
  opacity: 0.35;
  animation: classroom-pulse 2s ease-out infinite;
}

@keyframes classroom-pulse {
  0% { transform: scale(0.95); opacity: 0.5; }
  70% { transform: scale(1.15); opacity: 0; }
  100% { transform: scale(1.15); opacity: 0; }
}

.classroom-student-waiting h1 {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 500;
}

.classroom-student-waiting p {
  margin: 0;
  color: #5f6368;
  font-size: 16px;
  line-height: 1.5;
}

.classroom-student-active__head h1 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 500;
}

.classroom-student-active__head p {
  margin: 0 0 20px;
  color: #5f6368;
}

.classroom-student-progress {
  display: block;
  width: 100%;
  height: 10px;
  margin-bottom: 8px;
}

.classroom-student-progress-label {
  margin: 0 0 28px;
  font-size: 13px;
  color: #5f6368;
}

.classroom-student-lessons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.classroom-student-lesson {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid #e8eaed;
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.06);
}

.classroom-student-lesson--locked {
  opacity: 0.65;
  background: #f8f9fa;
}

.classroom-student-lesson--done {
  border-color: #ceead6;
  background: #f8fff9;
}

.classroom-student-lesson__num {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #e8f0fe;
  color: #174ea6;
  font-weight: 500;
  font-size: 14px;
}

.classroom-student-lesson__title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 500;
}

.classroom-student-lesson__meta {
  margin: 0;
  font-size: 13px;
  color: #5f6368;
}

.classroom-student-lesson__lock,
.classroom-student-lesson__done {
  font-size: 13px;
  font-weight: 500;
  color: #5f6368;
}

.classroom-student-lesson__done {
  color: #137333;
  font-size: 18px;
}

.classroom-student-status {
  margin-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #5f6368;
  min-height: 1.2em;
}

body.classroom-student-shell .classroom-lesson-main {
  max-width: none;
  padding: 0;
}

body.classroom-student-shell .academy-panel--lesson {
  border-radius: 0;
  border-left: none;
  border-right: none;
}

/* Classroom live lessons — light lesson viewer (matches app-shell theme) */
body.classroom-student-shell.lesson-immersive .lesson-viewer {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-content,
body.classroom-student-shell.lesson-immersive .lesson-block--text,
body.classroom-student-shell.lesson-immersive .lesson-block--heading {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-block--text {
  color: #3c4043;
}

body.classroom-student-shell.lesson-immersive .lesson-block--heading {
  border-bottom-color: #e8eaed;
}

body.classroom-student-shell.lesson-immersive .lesson-viewer__header {
  background: #fff;
  border: 1px solid #e8eaed;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}

body.classroom-student-shell.lesson-immersive .lesson-reading {
  background: #fff;
  border: 1px solid #e8eaed;
  box-shadow: 0 1px 2px rgba(60, 64, 67, 0.08);
}

body.classroom-student-shell.lesson-immersive .lesson-page-nav {
  background: #f8f9fa;
  border: 1px solid #e8eaed;
  box-shadow: none;
}

body.classroom-student-shell.lesson-immersive .lesson-page-nav__track {
  background: #e8eaed;
}

body.classroom-student-shell.lesson-immersive .lesson-page-info {
  color: #5f6368;
}

body.classroom-student-shell.lesson-immersive .lesson-page-nav .admin-btn--secondary {
  background: #fff;
  border: 1px solid #dadce0;
  color: #1a73e8;
}

body.classroom-student-shell.lesson-immersive .lesson-moment {
  background: #fff;
  border-color: #e8eaed;
}

body.classroom-student-shell.lesson-immersive .lesson-moment__head {
  background: linear-gradient(180deg, #f8f9fa 0%, #fff 100%);
  border-bottom-color: #e8eaed;
}

body.classroom-student-shell.lesson-immersive .lesson-moment__eyebrow {
  color: #5f6368;
}

body.classroom-student-shell.lesson-immersive .lesson-moment__meta {
  color: #80868b;
}

body.classroom-student-shell.lesson-immersive .lesson-quiz-prompt {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-status__count {
  color: #5f6368;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-progress {
  background: #e8eaed;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-question {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-done__title {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-done__score {
  color: #5f6368;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-done__score strong {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-blitz-done__review-note {
  color: #5f6368;
}

body.classroom-student-shell.lesson-immersive .quiz-option--prior-miss .quiz-option__glyph {
  color: #c5221f;
  border-color: #f9ab9e !important;
  background: #fce8e6 !important;
}

body.classroom-student-shell.lesson-immersive .quiz-option {
  background: #fff;
  border: 1px solid #dadce0;
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .interactive-exercise {
  background: #fff;
  border: 1px solid #e8eaed;
}

body.classroom-student-shell.lesson-immersive .exercise-editor {
  background: #fff;
  border-color: #e8eaed;
}

body.classroom-student-shell.lesson-immersive .exercise-textarea {
  color: #202124;
}

body.classroom-student-shell.lesson-immersive .lesson-page-finish__message {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: #3c4043;
}

body.classroom-student-shell.lesson-immersive .lesson-page-finish__message[data-state="success"] {
  color: #137333;
}

body.classroom-student-shell.lesson-immersive .lesson-page-finish__message[data-state="pending"] {
  color: #5f6368;
}

body.classroom-student-shell.lesson-immersive .lesson-page-finish__message[data-state="error"] {
  color: #c5221f;
}

body.classroom-student-shell.lesson-immersive .lesson-image-caption,
body.classroom-student-shell.lesson-immersive .lesson-video-title {
  color: #5f6368;
}