.progress-track{display:flex;gap:6px;margin:24px 0 8px}.progress-dot{flex:1;height:4px;border-radius:2px;background:var(--border);transition:background .2s}.progress-dot.active{background:var(--link)}.progress-dot.done{background:var(--link);opacity:.5}.lesson-count{display:block;font-size:12px;font-weight:600;color:var(--link);text-transform:uppercase;letter-spacing:.06em;margin:24px 0 8px}#lesson-title{font-size:28px;font-weight:400;color:var(--text);margin-bottom:20px}#lesson-body p{font-size:16px;color:var(--text);line-height:1.75;margin-bottom:16px}.lesson-quiz{margin-top:32px;border-top:1px solid var(--border);padding-top:8px}.quiz-question{padding:20px 0;border-bottom:1px solid var(--border)}.quiz-question:last-child{border-bottom:none}.quiz-question-text{font-size:15px;font-weight:500;color:var(--text);margin-bottom:14px;line-height:1.5}.q-number{display:inline-block;font-size:12px;font-weight:600;color:var(--link);margin-right:8px}.quiz-options{display:flex;flex-direction:column;gap:8px}.quiz-option-btn{text-align:left;padding:12px 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:14px;font-family:inherit;cursor:pointer;transition:border-color .15s,background .15s,color .15s}.quiz-option-btn:hover:not(:disabled):not(.correct):not(.wrong){border-color:var(--link);background:var(--bg-subtle)}.quiz-option-btn.correct,.quiz-option-btn.correct:hover{border-color:#1e8e3e;background:#1e8e3e1f;color:var(--text);font-weight:500}.quiz-option-btn.wrong,.quiz-option-btn.wrong:hover{border-color:#d93025;background:#d9302514}.quiz-option-btn:disabled{cursor:default}.lesson-actions{padding:32px 0 64px}.btn-primary{display:inline-block;background:#1a73e8;color:#fff;padding:10px 24px;border-radius:6px;font-size:14px;font-weight:500;border:none;cursor:pointer;transition:background .15s}.btn-primary:hover:not(:disabled){background:#1558b0}.btn-primary:disabled{opacity:.5;cursor:default}.btn-secondary{display:inline-block;background:none;border:1px solid var(--border);color:var(--text);padding:10px 24px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;font-family:inherit;transition:border-color .15s,color .15s}.btn-secondary:hover{border-color:var(--link);color:var(--link)}.completion-card{background:var(--bg-subtle);border:1px solid var(--border);border-radius:12px;padding:40px;text-align:center;margin:32px 0}.completion-card h2{font-size:28px;font-weight:500;color:var(--text);margin:14px 0 16px}.completion-sub{font-size:15px;color:var(--text-muted);line-height:1.65;max-width:560px;margin:0 auto 24px}.recap-list{list-style:none;counter-reset:recap;max-width:420px;margin:0 auto 28px;text-align:left}.recap-list li{counter-increment:recap;position:relative;padding:8px 0 8px 32px;font-size:14px;color:var(--text);border-bottom:1px solid var(--border-light)}.recap-list li:last-child{border-bottom:none}.recap-list li:before{content:"✓";position:absolute;left:0;top:8px;width:20px;height:20px;border-radius:50%;background:#1e8e3e;color:#fff;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center}.recap-link{margin-top:4px}.badge-card{background:var(--bg-subtle);border:1px solid var(--border);border-radius:12px;padding:32px;text-align:center;margin-bottom:64px}.badge-card h3{font-size:20px;font-weight:500;color:var(--text);margin-bottom:10px}.badge-card>p{font-size:14px;color:var(--text-muted);margin-bottom:20px}.badge-form{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.badge-form .subscribe-input{padding:10px 14px;border:1px solid var(--border);border-radius:6px;font-size:14px;background:var(--bg);color:var(--text);width:220px;outline:none}.badge-form .subscribe-input:focus{border-color:var(--link)}.badge-status{font-size:14px;color:var(--text-muted);margin-top:16px}.badge-status a{color:var(--link);font-weight:500}.badge-status a:hover{text-decoration:underline}@media(max-width:680px){#lesson-title{font-size:24px}.completion-card{padding:28px 20px}.badge-form{flex-direction:column;align-items:stretch}.badge-form .subscribe-input{width:auto}}