.teach-topbar { flex-wrap:wrap;gap:12px;display:flex;align-items:center;justify-content:space-between;padding:22px 0 18px; }
.teach-mode-label { font-size:10px;letter-spacing:.14em;font-weight:600;color:var(--muted); }
.journey { display:flex;gap:32px;margin:0;padding:0 0 25px;list-style:none;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted); }
.journey li { display:flex;align-items:center;gap:9px; }
.journey li span { font-size:10px;border:1px solid var(--line);width:25px;height:25px;display:grid;place-items:center;border-radius:50%; }
.journey li[aria-current="step"] { color:var(--forest);font-weight:600; }
.journey li[aria-current="step"] span { background:var(--forest);color:var(--lime);border-color:var(--forest); }
.upload-layout { display:grid;grid-template-columns:1fr .9fr;gap:90px;align-items:start;padding:58px 0 65px; }
.teach-heading { font-size:clamp(38px,4vw,58px);line-height:1.12;margin-top:19px;letter-spacing:-.04em; }
.teach-heading,.classroom-title,.lesson-item h3,.section-narration,.key-ideas li,.check-understanding h2,.lesson-transcript p { overflow-wrap:anywhere; }
.plan-heading > div:first-child,.plan-body > * { min-width:0; }
.teach-lead { color:var(--muted);font-size:15px;line-height:1.8;margin-top:22px;max-width:570px; }
.teaching-promise { display:flex;gap:20px;padding-top:26px; }
.teaching-promise:first-of-type { margin-top:8px; }
.promise-number { font:italic 25px Georgia,serif;color:#6c8254;line-height:1.3; }
.teaching-promise h2 { font-size:15px;font-weight:600;margin:0 0 4px; }
.teaching-promise p { font-size:13px;color:var(--muted); }
.upload-form { background:#fffef9;padding:30px;border:1px solid var(--line);border-radius:14px; }
.upload-form-heading { display:flex;align-items:center;gap:12px;margin-bottom:24px; }
.upload-form-heading h2 { margin:0 0 3px;font-size:17px;font-weight:600; }
.upload-form-heading p { color:var(--muted);font-size:12px; }
.drop-zone { position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:220px;padding:25px 15px;text-align:center;border:1px dashed #87967b;border-radius:10px;background:#f1f4e9;cursor:pointer;overflow-wrap:anywhere; }
.drop-zone:hover,.drop-zone.drag-over { background:#e7eed9;border-color:var(--forest); }
.drop-zone:focus-within { outline:3px solid #50806a;outline-offset:4px; }
.drop-zone input { position:absolute;width:1px;height:1px;opacity:0; }
.drop-zone svg { width:41px;height:41px;stroke:#627c4b;stroke-width:1.6;margin-bottom:4px; }
.drop-zone strong { font-size:15px; }
.drop-zone > span { font-size:12px;color:var(--muted); }
.browse-text { color:var(--forest);text-decoration:underline;text-underline-offset:3px; }
.drop-zone small { font-size:10px;color:var(--muted);margin-top:5px; }
.file-actions { min-height:28px;display:flex;justify-content:flex-end;align-items:center; }
.page-range { border:0;padding:0;margin:5px 0 20px;min-width:0; }
.page-range legend { font-size:12px;font-weight:600;padding:0; }
.page-range legend span { color:var(--muted);font-size:10px;font-weight:400;margin-left:7px; }
.page-range > p { font-size:10px;line-height:1.7;color:var(--muted);margin:8px 0 12px; }
.page-range > div { display:grid;grid-template-columns:1fr 1fr;gap:14px; }
.page-range label { font-size:11px; }
.page-range input { display:block;width:100%;min-width:0;margin-top:6px;padding:9px 10px;background:white;border:1px solid #adb9a8;border-radius:5px;color:var(--ink);font-size:13px; }
.text-button { border:0;background:none;color:var(--forest);padding:5px 0;font-size:12px;text-underline-offset:4px;cursor:pointer;text-decoration:underline; }
.text-button:hover { color:#587a43; }
.field-label { display:block;font-size:12px;font-weight:600;margin:7px 0 8px; }
.upload-form select { width:100%;background:white;border:1px solid #adb9a8;border-radius:6px;font:inherit;font-size:13px;padding:12px;color:var(--ink); }
.form-note { font-size:11px;color:var(--muted);line-height:1.8;margin:14px 0 20px; }
.primary-action,.secondary-action { display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:48px;padding:12px 20px;border:1px solid var(--forest);border-radius:6px;background:var(--forest);color:white;font-size:13px;font-weight:600;text-decoration:none; }
.primary-action > span { color:var(--lime);font-size:18px;font-weight:400; }
.primary-action:hover:not(:disabled) { background:#2a5548; }
.primary-action:disabled,.secondary-action:disabled { cursor:not-allowed;opacity:.55; }
.upload-form .primary-action { width:100%; }
.secondary-action { background:transparent;color:var(--forest); }
.secondary-action:hover { background:var(--selected); }
.service-status { text-align:center;color:var(--muted);font-size:10px;margin-top:12px;min-height:16px; }
.inline-error { padding:12px;background:#fff0e8;color:#873d28;border:1px solid #ddb49f;border-radius:6px;font-size:12px;margin:12px 0; }
.preparing-panel { display:grid;grid-template-columns:270px 1fr;gap:75px;align-items:center;max-width:1020px;margin:70px auto; }
.preparing-portrait img { width:100%;height:auto; }
.preparing-portrait { overflow:hidden;border-radius:130px 130px 10px 10px; }
.source-filename { font-size:12px;color:var(--muted);margin-top:16px;overflow-wrap:anywhere; }
progress { accent-color:#688151;width:100%;height:6px;display:block;border:0;border-radius:3px;overflow:hidden;margin:22px 0; }
progress::-webkit-progress-bar { background:#e2e7d9; }
progress::-webkit-progress-value { background:#688151; }
.preparation-steps { display:flex;gap:20px;font-size:10px;color:var(--muted);flex-wrap:wrap; }
.preparation-steps .stage-active { color:var(--forest);font-weight:650; }
.course-error { display:flex;align-items:center;justify-content:space-between;gap:30px;margin:30px 0;padding:24px;border:1px solid #d8b69d;border-radius:10px;background:#fbf0e5;font-size:14px; }
.course-error p { color:#80503a;font-size:13px;margin-top:7px; }
.error-actions { display:flex;flex-shrink:0;flex-direction:column;gap:8px; }
.plan-heading { display:flex;justify-content:space-between;gap:50px;padding:45px 0 34px;border-bottom:1px solid var(--line); }
.plan-heading .teach-heading { max-width:850px; }
.plan-avatar { display:flex;align-items:center;gap:16px;align-self:flex-start;margin-top:12px;flex-shrink:0; }
.plan-avatar img { width:72px;height:90px;object-fit:cover;object-position:center 28%;border-radius:35px 35px 6px 6px; }
.plan-avatar span { font-size:11px;line-height:1.8;color:var(--muted); }
.plan-avatar strong { font:26px Georgia,serif;color:var(--forest); }
.plan-body { display:grid;grid-template-columns:280px 1fr;gap:65px;padding:40px 0; }
.objectives ul { list-style:none;margin:22px 0 30px;padding:0; }
.objectives li { position:relative;padding-left:20px;margin-bottom:17px;font-size:13px;line-height:1.7; }
.objectives li::before { content:"↗";position:absolute;left:0;color:#688151; }
.source-note { border-top:1px solid var(--line);padding-top:20px;color:var(--muted);font-size:11px;line-height:1.8;margin-bottom:10px; }
.lesson-list-heading { display:flex;justify-content:space-between;align-items:center;margin-bottom:8px; }
.lesson-list-heading h2,.course-sidebar h2 { font-size:15px;font-weight:600;margin:0; }
.lesson-list-heading > span { font-size:11px;color:var(--muted); }
.lesson-list { list-style:none;margin:0;padding:0; }
.lesson-item { display:grid;grid-template-columns:34px minmax(0,1fr);gap:18px;padding:23px 0;border-bottom:1px solid var(--line); }
.lesson-number { font:italic 26px Georgia,serif;color:#70825c;padding-top:3px; }
.lesson-item h3 { margin:0 0 8px;font-size:19px;font-weight:550;line-height:1.4; }
.lesson-item p { font-size:13px;line-height:1.8;color:var(--muted);max-width:640px; }
.lesson-item-footer { display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:15px; }
.lesson-meta { display:flex;flex-wrap:wrap;gap:7px 13px;font-size:10px;color:var(--muted); }
.lesson-item .primary-action { min-height:38px;padding:8px 15px;font-size:11px; }
.lesson-status { color:#586e43;font-size:11px; }
.lesson-item progress { margin:12px 0 0;height:3px; }
.course-preparation { display:flex;align-items:center;gap:12px;background:#eaf0df;padding:17px 20px;border-radius:7px;margin-bottom:40px;font-size:12px; }
.course-preparation p { flex:1; }
.activity-dot { flex-shrink:0;width:7px;height:7px;border-radius:50%;background:#658343; }
.classroom-heading { display:flex;justify-content:space-between;gap:25px;align-items:flex-end;padding:28px 0; }
.classroom-title { font:400 34px/1.2 Georgia,serif;letter-spacing:-.025em;margin:15px 0 0;max-width:900px; }
.lesson-counter { font-size:11px;color:var(--muted);white-space:nowrap;padding-bottom:5px; }
.classroom-layout { display:grid;grid-template-columns:200px minmax(0,1fr);gap:30px;padding-bottom:50px; }
.classroom-main { min-width:0; }
.course-sidebar { border-right:1px solid var(--line);padding-right:20px; }
.course-sidebar h2 { font-size:12px; }
.course-sidebar ol { list-style:none;padding:0;margin:20px 0; }
.course-sidebar li { margin-bottom:7px; }
.course-sidebar button { display:flex;gap:12px;text-align:left;border:1px solid transparent;background:none;width:100%;border-radius:6px;padding:13px 10px;font-size:12px;line-height:1.6; }
.course-sidebar button > span:first-child { color:#6a8054;font-size:11px; }
.course-sidebar button[aria-current="true"] { background:var(--selected);border-color:#b1c09d; }
.course-sidebar button:disabled { color:var(--muted);cursor:not-allowed; }
.course-sidebar button:not(:disabled):hover { background:#eaf0df; }
.lesson-stage { display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px;align-items:start; }
.avatar-panel { min-width:0; }
.lesson-video-frame { position:relative;aspect-ratio:2/3;background:#152220;border-radius:10px 10px 0 0;overflow:hidden; }
.lesson-video-frame video { display:block;width:100%;height:100%;object-fit:contain; }
.teacher-badge { position:absolute;top:14px;left:14px;color:#fff;font-size:8px;letter-spacing:.12em;text-shadow:0 1px 4px black; }
.video-loading { position:absolute;inset:0;display:flex;align-items:center;justify-content:flex-end;flex-direction:column;padding:25px 20px;background:linear-gradient(transparent 35%,rgb(10 29 27 / .92));color:white;font-size:12px;text-align:center; }
.video-loading progress { margin-bottom:0; }
.subtitle-panel { background:var(--forest);color:#fff;padding:15px 17px;min-height:110px;border-radius:0 0 8px 8px; }
.subtitle-label { display:block;color:var(--lime);font-size:8px;letter-spacing:.15em;margin-bottom:6px; }
.subtitle-panel p { font-size:13px;line-height:1.65; }
.playback-note { font-size:10px;color:var(--muted);margin-top:8px; }
.lesson-explanation { padding-top:8px;min-width:0; }
.lesson-explanation h2 { font:400 30px/1.18 Georgia,serif;letter-spacing:-.02em;margin:18px 0 22px;overflow-wrap:anywhere; }
.section-narration { font-size:14px;line-height:1.9;color:#52625a; }
.key-ideas { margin-top:25px;padding:20px;background:#ebefdf;border-left:3px solid #8ba568; }
.key-ideas h3 { margin:0 0 12px;font-size:11px;text-transform:uppercase;letter-spacing:.08em; }
.key-ideas ul { margin:0;padding-left:17px;font-size:12px;line-height:1.8; }
.key-ideas li + li { margin-top:9px; }
.section-sources { display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;font-size:10px;color:var(--muted); }
.section-sources a { text-underline-offset:3px; }
.playback-controls { display:flex;gap:15px;align-items:center;padding:18px 0; }
.play-button { background:var(--forest);color:white;border:0;border-radius:6px;min-width:72px;height:40px;font-size:12px; }
.play-button:disabled { opacity:.5;cursor:wait; }
.playback-controls input { flex:1;min-width:0;accent-color:var(--forest); }
.lesson-time { font-size:11px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums; }
.playback-controls select { border:1px solid var(--line);background:transparent;padding:7px 4px;border-radius:5px;color:var(--forest);font-size:11px; }
.section-navigation { display:flex;gap:7px;overflow-x:auto;padding:3px 3px 10px; }
.section-navigation button { border:1px solid var(--line);background:transparent;border-radius:5px;white-space:nowrap;padding:9px 12px;font-size:10px; }
.section-navigation button[aria-current="true"] { background:#e5edd7;border-color:#718b58; }
.section-navigation button:hover { background:var(--selected); }
.check-understanding { margin-top:20px;padding:25px 0;border-top:1px solid var(--line); }
.check-understanding h2 { font-size:17px;line-height:1.6;font-weight:500;margin:13px 0; }
.check-understanding details { font-size:13px;line-height:1.8; }
.check-understanding summary,.lesson-transcript summary { cursor:pointer;font-size:12px;text-underline-offset:4px; }
.check-understanding details p { margin-top:15px;padding:18px;background:var(--selected);border-radius:5px; }
.lesson-finish { display:flex;align-items:center;justify-content:space-between;gap:25px;padding-bottom:24px; }
.lesson-finish p { color:var(--muted);font-size:12px; }
.lesson-transcript { border-top:1px solid var(--line);padding:20px 0; }
.lesson-transcript h3 { font:24px Georgia,serif;margin:24px 0 12px; }
.lesson-transcript p { font-size:14px;line-height:1.9;color:var(--muted); }
.sr-only { position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0; }
@media(max-width:1100px) { .upload-layout { gap:45px; }.upload-form { padding:25px; }.plan-body { gap:40px;grid-template-columns:240px 1fr; }.classroom-layout { grid-template-columns:160px minmax(0,1fr);gap:20px; }.lesson-stage { gap:22px;grid-template-columns:220px minmax(0,1fr); }.lesson-explanation h2 { font-size:26px; }.section-narration { font-size:13px; }.key-ideas { padding:15px; }.plan-avatar { flex-direction:column;align-items:flex-start;gap:7px; } }
@media(max-width:850px) { .upload-layout { gap:30px; }.upload-form { padding:20px; }.upload-form-heading h2 { font-size:15px; }.teach-heading { font-size:40px; }.teaching-promise p { font-size:12px; }.plan-body { grid-template-columns:200px 1fr;gap:30px; }.classroom-layout { grid-template-columns:minmax(0,1fr); }.course-sidebar { display:none; }.lesson-stage { grid-template-columns:240px minmax(0,1fr);gap:25px; }.classroom-title { font-size:29px; }.preparing-panel { grid-template-columns:200px 1fr;gap:35px; }.journey { gap:24px;font-size:11px; } }
@media(max-width:620px) {
  .teach-topbar { padding:15px 0 12px; }.teach-mode-label { font-size:9px; }
  .journey { gap:14px;justify-content:space-between;padding-bottom:17px;font-size:9px; }.journey li { gap:5px; }.journey li span { width:20px;height:20px;font-size:8px; }
  .upload-layout { grid-template-columns:1fr;padding:30px 0 40px;gap:26px; }.teach-heading { font-size:40px;margin-top:16px; }.teach-lead { font-size:13px;margin-top:18px; }.teaching-promise { gap:15px;padding-top:18px; }.teaching-promise h2 { font-size:13px; }.teaching-promise p { font-size:11px; }.promise-number { font-size:22px; }.upload-form { padding:20px; }.drop-zone { min-height:200px; }.upload-form-heading h2 { font-size:15px; }.form-note { font-size:10px; }
  .preparing-panel { display:flex;flex-direction:column;align-items:flex-start;gap:26px;margin:30px 0 45px; }.preparing-portrait { width:135px;height:155px;border-radius:65px 65px 7px 7px; }.preparing-portrait img { width:100%;height:100%;object-fit:cover;object-position:center 25%; }.preparing-copy .teach-heading { font-size:36px; }.preparation-steps { gap:14px;font-size:9px; }
  .course-error { flex-direction:column;align-items:stretch;padding:20px;gap:18px; }.error-actions { align-items:flex-start; }
  .plan-heading { padding:30px 0 25px;gap:15px; }.plan-heading .teach-heading { font-size:35px; }.plan-avatar { display:none; }.plan-body { grid-template-columns:1fr;gap:30px;padding:25px 0; }.objectives ul { margin:17px 0 18px; }.objectives li { font-size:12px;margin-bottom:10px; }.source-note { font-size:10px;margin-bottom:4px; }.lesson-item { gap:12px;grid-template-columns:25px minmax(0,1fr); }.lesson-number { font-size:24px; }.lesson-item h3 { font-size:17px; }.lesson-item p { font-size:12px; }.lesson-item-footer { align-items:flex-start; }.lesson-meta { flex-direction:column;gap:4px; }.lesson-item .primary-action { padding-inline:12px;font-size:10px;gap:10px; }.course-preparation { flex-wrap:wrap;padding:15px;font-size:11px; }.course-preparation .text-button { margin-left:19px; }
  .classroom-heading { padding:22px 0;align-items:flex-start;gap:15px; }.classroom-title { font-size:27px; }.lesson-counter { font-size:9px;padding-top:7px; }.classroom-heading .text-button { font-size:11px; }
  .lesson-stage { display:block; }.avatar-panel { position:sticky;top:0;z-index:2;background:var(--paper);padding-bottom:10px; }.lesson-video-frame { aspect-ratio:auto;height:210px;border-radius:8px 8px 0 0; }.teacher-badge { font-size:7px; }.subtitle-panel { padding:10px 14px;min-height:82px; }.subtitle-panel p { font-size:12px; }.subtitle-label { font-size:7px;margin-bottom:3px; }.playback-note { font-size:9px;margin-top:5px; }.lesson-explanation { padding:22px 0 0; }.lesson-explanation h2 { font-size:28px;margin:12px 0 15px; }.section-narration { font-size:13px;line-height:1.85; }.key-ideas { margin-top:20px; }.key-ideas ul { font-size:12px; }.playback-controls { gap:9px;padding-block:15px; }.play-button { min-width:58px;font-size:11px; }.lesson-time { font-size:9px; }.playback-controls select { font-size:10px; }.section-navigation { gap:5px; }.section-navigation button { font-size:9px;padding:9px; }.check-understanding h2 { font-size:15px; }.lesson-finish { flex-direction:column;align-items:stretch;gap:15px; }.lesson-finish .primary-action { width:100%; }.lesson-finish p { font-size:11px; }
}

#teach-step [tabindex="-1"]:focus { outline:none; }

/* Keep progress explicit and the learning path available at every screen size. */
.upload-status { margin:18px 0;padding:16px;background:var(--selected);border-radius:6px; }
.progress-heading { display:flex;justify-content:space-between;gap:12px;font-size:12px;line-height:1.6; }
.progress-heading strong,.preparation-percent { font-variant-numeric:tabular-nums;white-space:nowrap; }
.upload-status progress { margin:12px 0; }
.upload-status p { color:var(--muted);font-size:11px;line-height:1.7; }
.preparation-percent { color:var(--forest);font-size:12px;margin:0 0 16px; }
.preparation-result .primary-action { min-width:180px; }
.preparation-result .form-note { margin-bottom:14px; }
.course-sidebar summary { cursor:pointer;font-size:13px;font-weight:600; }
.classroom-overview { margin-top:15px;font-size:11px;line-height:1.8;color:var(--muted); }
@media(max-width:850px) {
  .course-sidebar { display:block;border-right:0;border-bottom:1px solid var(--line);padding:0 0 18px; }
  .course-sidebar ol { display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px;margin:12px 0; }
  .course-sidebar li { min-width:0; }
  .classroom-overview { max-width:650px; }
}
@media(max-width:620px) {
  .course-sidebar ol { grid-template-columns:1fr; }
  .course-sidebar button { padding:8px 10px; }
  .preparation-result .primary-action { width:100%; }
  .progress-heading { font-size:11px; }
}

.lesson-question-bar{display:flex;align-items:center;gap:18px;margin:22px 0 16px;flex-wrap:wrap}.lesson-question-bar span{font-size:13px;color:var(--muted);line-height:1.5;flex:1;min-width:180px}.lesson-question-bar button{min-height:44px}