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var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:8px}.lb-secnum{font-size:.72rem;font-weight:700;letter-spacing:.14em;color:var(--secnum,var(--accent));margin-bottom:8px}.lb-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;background:transparent}.lb-progress-fill{height:100%;background:linear-gradient(90deg,var(--green),var(--green-deep));transform-origin:left;transform:scaleX(0);transition:transform .08s linear}.lb-lessonhero{padding-bottom:34px;border-bottom:1px solid var(--line)}.lb-lessonhero-eyebrow{font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}.lb-lessonhero-tagline{font-family:Fraunces,serif;font-style:italic;font-size:1.12rem;color:var(--green-deep);margin-top:18px}.lb-reveal .lb-finish,.lb-reveal .lb-section{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}.lb-reveal .lb-finish.in,.lb-reveal .lb-section.in{opacity:1;transform:none}@media 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solid #cfe6da;border-radius:var(--radius);padding:16px 18px;margin:8px 0 16px}.lb-share-left{flex:1 1;min-width:0}.lb-share-label{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--green-deep);margin-bottom:8px}.lb-share-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.lb-share-url{font-weight:600;color:var(--green-deep);word-break:break-all}.lb-share-qr{width:108px;height:108px;flex-shrink:0;border-radius:10px;border:1px solid #cfe6da;background:#fff;padding:6px}@media (max-width:540px){.lb-share{flex-direction:column-reverse;align-items:stretch}.lb-share-qr{align-self:center;width:150px;height:150px}}.lb-lesson{transition:transform .15s,box-shadow .15s,border-color .15s}.lb-lesson:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(20,40,30,.09)}.lb-lesson-top{display:flex;align-items:center;gap:8px;margin-bottom:6px}.lb-lesson-ago{margin-left:auto;font-size:.78rem;color:var(--faint)}.lb-pill.live{background:#eaf5ef;color:var(--green-deep)}.lb-lesson-meta{display:flex;gap:14px;align-items:center;margin-top:6px;font-size:.84rem;color:var(--muted)}.lb-lesson-go{margin-left:auto;font-weight:600;color:var(--green)}.lb-empty{text-align:center;border:1px dashed var(--line);border-radius:var(--radius);padding:52px 26px;margin-top:26px}.lb-empty-emoji{font-size:2.2rem;margin-bottom:10px}.lb-empty .lb-sub{max-width:44ch;margin:0 auto 20px}.lb-legal h2{font-family:Fraunces,serif;font-weight:600;font-size:1.25rem;margin:30px 0 8px}.lb-legal p{color:var(--muted);margin-bottom:10px;font-size:.96rem}.lb-legal p b{color:var(--ink)}.lb-legal a{color:var(--green-deep);font-weight:600}.lb-savestate{font-size:.84rem;color:var(--muted);margin-right:auto;margin-left:8px}.lb-savestate.dirty{color:var(--amber);font-weight:600}