/* A quieter reading frame for lesson 01. No learning state is changed. */
body.fl-page.ai-atelier { background-image: none; background-color: #0b1420; }
body.fl-page.ai-atelier .fl-header { box-shadow: none; background: #0b1420f5; border-bottom-color: #243342; }
.fl-page .fl-header .preview-label, .fl-page .fl-course > span,
.fl-page .fl-outline-heading > .eyebrow, .fl-page .fl-period-reserve,
.fl-page .fl-control-hint, .fl-page #lesson-progress { display: none; }
body.fl-page.ai-atelier .fl-outline { background: #0b1420; border-right-color: #243342; }
.fl-page .fl-outline-heading { padding-bottom: 20px; }
body.fl-page.ai-atelier .fl-outline-heading h2 { font-size: 20px; font-family: inherit; line-height: 1.55; }
.fl-page .fl-outline-heading > p:last-child { color: #9bafbc; }
body.fl-page.ai-atelier .fl-activity-link { border: 0; border-radius: 4px; background: transparent; box-shadow: none; min-height: 43px; margin: 2px 0; }
body.fl-page.ai-atelier .fl-activity-link:hover { background: #142737; }
body.fl-page.ai-atelier .fl-activity-link.active { background: #1d3b43; color: #e3f5f0; box-shadow: inset 2px 0 #8dcfc4; }
.fl-page .fl-outline-foot { margin-top: 18px; }
.fl-page .fl-other-materials { margin-top: 14px; line-height: 1.7; }
.fl-page .fl-other-materials > summary { cursor: pointer; color: #aabfce; min-height: 30px; font-size: 12px; }
.fl-page .fl-other-materials .fl-outline-pending { display: block; margin: 10px 0; }
body.fl-page.ai-atelier .fl-main { max-width: 1440px; padding-top: 28px; }
.fl-page .fl-meta > .eyebrow { color: #97b7c5; letter-spacing: .02em; font-weight: 400; }
body.fl-page.ai-atelier .fl-heading { margin: 14px 0 21px; }
body.fl-page.ai-atelier .fl-heading h1 { font-family: inherit; font-size: clamp(28px, 2.6vw, 40px); line-height: 1.45; font-weight: 500; letter-spacing: 0; margin-bottom: 8px; }
.fl-page:not(:has(#lesson-teacher-toggle[aria-pressed=true])) #activity-lead,
.fl-page[data-theory-view=concept] #lesson-concept-conclusion { display: none; }
.fl-page[data-theory-view=concept]:not(:has(#lesson-teacher-toggle[aria-pressed=true])) #classroom-route-guide { display: none; }
.fl-page .tc-content > h2 { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
body.fl-page.ai-atelier .theory-core { margin-top: 0; }
body.fl-page.ai-atelier .tc-content { background: transparent; border: 0; border-radius: 0; box-shadow: none; padding: 22px 0 0; }
.fl-page .tc-mode-controls { border-bottom: 1px solid #2b414e; padding-bottom: 12px; margin-bottom: 0; }
.fl-page .theory-core .tc-mode-controls .tc-button { border-color: transparent; background: transparent; color: #a7c0cb; border-radius: 4px; }
.fl-page .theory-core .tc-mode-controls .tc-button[aria-pressed=true] { background: #22434c; color: #e4f6f1; }
.fl-page .theory-core .tc-mode-controls .tc-button:hover { border-color: #719d9c; }
.fl-page .tc-definition { max-width: 1000px; font-size: 20px; line-height: 1.85; margin: 0 0 24px; }
.fl-page .tc-flow { margin: 18px 0 24px; }
.fl-page .tc-flow-node { border-top-color: #42636d; }
.fl-page .tc-step { display: none; }
.fl-page .tc-spotlight { border-radius: 0; background: transparent; border-left: 2px solid #6daba8; padding-left: 22px; }
.fl-page .tc-explain { border-top: 0; padding-top: 0; }
.fl-page .tc-enter { margin-top: 20px; }
.fl-page .classroom-route-guide { padding: 0 0 13px; border: 0; border-radius: 0; background: transparent; box-shadow: none; margin-bottom: 14px; }
.fl-page .classroom-route-guide .cr-heading { gap: 8px; }
.fl-page .classroom-route-guide .cr-core { font-size: 15px; font-weight: 400; color: #c4d8e2; }
.fl-page .classroom-route-guide .cr-required-tag { color: #a5dcd0; }
.fl-page .classroom-route-guide .cr-duration { display: none; }
.fl-page .classroom-route-guide > .cr-guidance { margin-top: 8px; }
.fl-page .classroom-route-guide > .cr-guidance > summary { color: #9eb9c6; font-size: 12px; cursor: pointer; padding: 3px 0; min-height: 30px; }
.fl-page .classroom-route-guide .cr-thread-map { margin-top: 12px; }
.fl-page .classroom-route-guide .cr-folds { margin-top: 12px; }
.fl-page:has(#lesson-teacher-toggle[aria-pressed=true]) .classroom-route-guide :is(.cr-thread-map,.cr-bridge) { display: flex; }
.fl-page:has(#lesson-teacher-toggle[aria-pressed=true]) .classroom-route-guide .cr-support-cue { display: block; }
.fl-page .cr-concept-conclusion { border-top-color: #304b57; }
body.fl-page.ai-atelier .fl-stage { box-shadow: none; }
body.fl-page.ai-atelier .fl-controls { background: #0b1420f5; border-top-color: #243342; box-shadow: none; }
.fl-page .fl-navigation button { min-width: 105px; }
.fl-page.fl-large .tc-definition { font-size: 24px; }
.fl-page.fl-large .classroom-route-guide .cr-core { font-size: 19px; }
body.fl-page.ai-atelier.fl-large .fl-heading h1 { font-size: clamp(32px, 2.9vw, 46px); }
body.fl-page.ai-atelier.ai-presenting .fl-main { max-width: 1640px; }
@media (min-width:1600px) {
  .fl-page .tc-definition { font-size: 23px; }
  .fl-page.fl-large .tc-definition { font-size: 26px; }
}
@media (max-width:800px) {
  body.fl-page.ai-atelier .fl-main { padding-top: 20px; }
  .fl-page .tc-definition { font-size: 18px; }
  .fl-page.fl-large .tc-definition { font-size: 21px; }
  body.fl-page.ai-atelier .fl-heading h1 { font-size: 27px; }
  .fl-page .tc-content { padding-top: 18px; }
  .fl-page .classroom-route-guide .cr-core { font-size: 14px; }
}
@media print {
  body.fl-page.ai-atelier { background: white; }
  .fl-page .tc-definition { color: #111; }
}