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24px}.lesson-header-content{align-items:flex-start;display:flex;gap:16px;justify-content:space-between;margin-bottom:12px}.lesson-header-left{flex:1 1;min-width:0}.current-lesson-title{color:#1f2937;color:var(--text-dark);font-size:20px;font-weight:600;margin:0 0 4px}.lesson-description{line-clamp:2;color:#6b7280;color:var(--text-gray);font-size:14px;margin:0}.lesson-header-actions{display:flex;flex-shrink:0;gap:8px}.action-btn{align-items:center;background:#fff;background:var(--bg-light);border:1px solid #e5e7eb;border:1px solid var(--border-color);border-radius:8px;color:#1f2937;color:var(--text-dark);display:flex;font-size:13px;font-weight:500;gap:8px;padding:10px 18px;transition:all .2s}.action-btn:hover{background:#f3f4f6;background:var(--bg-light-gray);color:#3b82f6;color:var(--primary-color)}.action-btn.active,.action-btn:hover{border-color:#3b82f6;border-color:var(--primary-color)}.action-btn.active{background:#3b82f6;background:var(--primary-color);color:#fff}.action-btn i{font-size:14px}.objectives-section{background:#fff;background:var(--bg-light);border:1px solid #e5e7eb;border:1px solid var(--border-color);border-radius:12px;margin-top:12px;overflow:hidden}.objectives-header{align-items:center;cursor:pointer;display:flex;justify-content:space-between;padding:12px 16px;transition:background .2s}.objectives-header:hover{background:#f3f4f6;background:var(--bg-light-gray)}.objectives-header span{color:#1f2937;color:var(--text-dark);font-size:14px;font-weight:600}.objectives-header i{color:#9ca3af;color:var(--text-light-gray)}.objectives-list{list-style:none;margin:0;padding:0 16px 16px}.objectives-list li{align-items:flex-start;border-bottom:1px solid #e5e7eb;border-bottom:1px solid var(--border-color);display:flex;gap:10px;padding:8px 0}.objectives-list li:last-child{border-bottom:none}.objectives-list li i{color:#10b981;color:var(--secondary-color);flex-shrink:0;font-size:14px;margin-top:2px}.objectives-list li 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#06b6d440;transform:translateY(-4px)}.downloadable-icon{align-items:center;background:linear-gradient(135deg,#cffafe,#a5f3fc);border:1px solid #06b6d4;border-radius:12px;display:flex;flex-shrink:0;height:48px;justify-content:center;width:48px}.downloadable-icon i{color:#0891b2;font-size:24px}.downloadable-info{flex:1 1;min-width:0}.downloadable-title{color:#1f2937;color:var(--text-dark);font-size:14px;font-weight:600;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.downloadable-meta{color:#6b7280;display:flex;font-size:12px;gap:10px}.download-action{color:#a5f3fc;flex-shrink:0;font-size:20px;transition:all .2s ease-in-out}.downloadable-card:hover .download-action{color:#3b82f6;color:var(--primary-color)}.complete-btn{align-items:center;background:linear-gradient(135deg,#10b981,#059669);border:none;border-radius:8px;box-shadow:0 2px 8px #10b9814d;color:#fff;cursor:pointer;display:flex;font-size:13px;font-weight:600;gap:8px;padding:10px 18px;transition:all .2s ease-in-out}.complete-btn:hover{background:linear-gradient(135deg,#059669,#047857);box-shadow:0 4px 12px #10b98166;transform:translateY(-2px)}.complete-btn:active{box-shadow:0 1px 4px #10b9814d;transform:translateY(0)}.complete-btn i{font-size:15px}.media-player-container{align-items:center;background:#f9fafb;background:var(--bg-gray);display:flex;flex:1 1;justify-content:center;min-height:500px;overflow-y:auto;padding:24px;position:relative}.content-section-wrapper{display:flex;flex-direction:column;height:500px;margin:0 auto;max-width:90vw;width:500px}.content-section-header{align-items:center;background:#fff;background:var(--bg-light);border:1px solid #e5e7eb;border-left:4px solid #3b82f6;border:1px solid var(--border-color);border-left:4px solid var(--primary-color);border-radius:12px;display:flex;gap:16px;margin-bottom:16px;padding:16px 20px;transition:all .3s ease}.content-section-header:hover{box-shadow:0 2px 8px #00000014;box-shadow:var(--shadow-sm)}.content-type-badge{align-items:center;border-radius:12px;box-shadow:0 4px 12px #00000026;color:#fff;display:flex;flex-shrink:0;font-size:24px;height:48px;justify-content:center;width:48px}.content-header-info{flex:1 1}.content-header-info h6{color:#1f2937;color:var(--text-dark);font-size:16px;font-weight:600;margin:0}.content-header-info p{color:#6b7280;color:var(--text-gray);font-size:13px;margin:4px 0 0}.content-player-wrapper{align-items:center;background:#fff;background:var(--bg-light);border:1px solid #e5e7eb;border:1px solid var(--border-color);border-radius:12px;box-shadow:0 2px 8px #00000014;box-shadow:var(--shadow-sm);display:flex;flex:1 1;justify-content:center;overflow:hidden;padding:20px}.content-player-wrapper.audio-wrapper{align-items:center;display:flex;flex-direction:column;justify-content:center}.content-player-wrapper.pdf-wrapper{overflow:auto;padding:16px}.content-player-wrapper.image-wrapper{align-items:center;background:#f9fafb;background:var(--bg-gray);display:flex;justify-content:center}.video-player{background:#000;border-radius:8px;display:block;height:100%;object-fit:contain;width:100%}.audio-player-container{align-items:center;display:flex;gap:20px;max-width:600px;width:100%}.audio-player-icon{align-items:center;background:linear-gradient(135deg,#8b5cf6,#7c3aed);border-radius:12px;box-shadow:0 4px 12px #8b5cf64d;color:#fff;display:flex;flex-shrink:0;font-size:36px;height:72px;justify-content:center;width:72px}.audio-player{border-radius:8px;flex:1 1;height:40px}.lesson-image{border-radius:12px;box-shadow:0 8px 24px #0000001f;max-height:100%;max-width:100%;object-fit:contain}.resume-prompt{align-items:center;background:#000000d9;border-radius:8px;bottom:0;display:flex;justify-content:center;left:0;position:absolute;right:0;top:0;z-index:10}.resume-content{background:#fff;background:var(--bg-light);border-radius:12px;box-shadow:0 8px 16px #0000001f;box-shadow:var(--shadow-md);max-width:400px;padding:32px;text-align:center}.resume-content p{color:#1f2937;color:var(--text-dark);font-size:15px;font-weight:500;margin:0 0 20px}.resume-buttons{display:flex;gap:12px;justify-content:center}.btn-no,.btn-yes{border:none;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;padding:10px 20px;transition:all .3s ease}.btn-yes{background:linear-gradient(135deg,#10b981,#059669);color:#fff}.btn-yes:hover{box-shadow:0 4px 12px #10b98166;transform:translateY(-2px)}.btn-no{background:#f3f4f6;background:var(--bg-light-gray);border:1px solid #e5e7eb;border:1px solid var(--border-color);color:#1f2937;color:var(--text-dark)}.btn-no:hover{background:#f9fafb;background:var(--bg-gray)}.empty-state-container,.error-state-container,.locked-lesson-container{align-items:center;background:linear-gradient(135deg,#3b82f6,#1e40af);border-radius:16px;color:#fff;display:flex;flex-direction:column;justify-content:center;min-height:400px;padding:40px;text-align:center;width:100%}.locked-lesson-container{background:linear-gradient(135deg,#f093fb,#f5576c)}.empty-state-icon,.error-state-icon,.locked-icon{align-items:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fff3;border-radius:50%;display:flex;font-size:48px;height:100px;justify-content:center;margin-bottom:20px;width:100px}.empty-state-title{font-size:20px;font-weight:600;margin-bottom:8px}.empty-state-text{font-size:15px;max-width:400px;opacity:.9}.locked-lesson-container h4{font-size:22px;margin-bottom:8px}.locked-lesson-container p{margin-bottom:20px;opacity:.9}.btn-primary-gradient{align-items:center;background:#fff;border:none;border-radius:10px;color:#3b82f6;color:var(--primary-color);cursor:pointer;display:inline-flex;font-size:14px;font-weight:600;gap:8px;padding:12px 24px;text-decoration:none;transition:all .2s}.btn-primary-gradient:hover{box-shadow:0 8px 20px #ffffff4d;transform:translateY(-2px)}.bottom-controls{background:#fff;background:var(--bg-light);border-top:1px solid #e5e7eb;border-top:1px solid var(--border-color);flex-wrap:wrap;justify-content:space-between;padding:16px 24px}.bottom-controls,.controls-left,.controls-right{align-items:center;display:flex;gap:12px}.nav-btn{align-items:center;background:#f3f4f6;background:var(--bg-light-gray);border:1px solid #e5e7eb;border:1px solid var(--border-color);color:#1f2937;color:var(--text-dark);display:flex;font-size:13px;font-weight:500;gap:8px;padding:10px 18px}.floating-objectives-btn{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:50%;box-shadow:0 4px 12px #667eea4d;color:#fff;cursor:pointer;display:flex;font-size:20px;height:50px;justify-content:center;position:relative;transition:all .3s ease;width:50px}.floating-objectives-btn:hover{box-shadow:0 6px 20px #667eea66;transform:scale(1.1)}.floating-objectives-btn .objectives-count{align-items:center;background:#ef4444;border:2px solid #fff;border-radius:50%;color:#fff;display:flex;font-size:12px;font-weight:600;height:24px;justify-content:center;min-width:24px;position:absolute;right:-8px;top:-8px}.floating-overlay{animation:fadeIn .2s ease;background:#0006;bottom:0;left:0;position:fixed;right:0;top:0;z-index:998}.floating-objectives-panel{background:#fff;box-shadow:-4px 0 20px #00000026;display:flex;flex-direction:column;height:100vh;overflow-y:auto;position:fixed;right:-400px;top:0;transition:right .3s ease;width:400px;z-index:999}.floating-objectives-panel.open{right:0}.floating-objectives-header{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);border-bottom:2px solid #fff3;color:#fff;display:flex;flex-wrap:nowrap;gap:16px;justify-content:space-between;padding:16px 20px;position:-webkit-sticky;position:sticky;top:0;z-index:1000}.floating-objectives-header h6{align-items:center;display:flex;flex:1 1;font-size:16px;font-weight:700;gap:8px;margin:0;min-width:0;white-space:nowrap}.close-floating-btn{align-items:center;background:#fff6;border:none;border-radius:8px;box-shadow:0 2px 8px #0003;color:#fff;cursor:pointer;display:flex;flex-shrink:0;font-size:24px;height:44px;justify-content:center;line-height:1;min-width:44px;padding:0;position:relative;transition:all .2s ease-in-out;width:44px;z-index:1001}.close-floating-btn:hover{background:#fff9;box-shadow:0 3px 12px #0000004d;transform:scale(1.15)}.close-floating-btn:active{transform:scale(.9)}.floating-objectives-list{flex:1 1;list-style:none;overflow-y:auto;padding:20px}.floating-objectives-list li{align-items:flex-start;color:#1f2937;color:var(--text-dark);display:flex;font-size:14px;gap:12px;line-height:1.6;margin-bottom:16px}.floating-objectives-list li i{color:#10b981;flex-shrink:0;font-size:18px;margin-top:2px}.floating-objectives-list li span{word-break:break-word}.floating-resources-panel{background:#fff;box-shadow:-4px 0 20px #00000026;display:flex;flex-direction:column;height:100vh;overflow-y:auto;position:fixed;right:-400px;top:0;transition:right .3s ease;width:400px;z-index:999}.floating-resources-panel.open{right:0}.floating-resources-header{align-items:center;background:linear-gradient(135deg,#16a34a,#15803d);border-bottom:2px solid #fff3;color:#fff;display:flex;flex-wrap:nowrap;gap:16px;justify-content:space-between;padding:16px 20px;position:-webkit-sticky;position:sticky;top:0;z-index:1000}.floating-resources-header h6{align-items:center;display:flex;flex:1 1;font-size:16px;font-weight:700;gap:8px;margin:0;min-width:0;white-space:nowrap}.floating-resources-grid{display:flex;flex:1 1;flex-direction:column;gap:12px;overflow-y:auto;padding:20px}.floating-resource-card{align-items:flex-start;background:#f9fafb;border:1px solid #e5e7eb;border-radius:8px;cursor:pointer;display:flex;gap:12px;padding:12px 14px;transition:all .2s ease}.floating-resource-card:hover{background:#f3f4f6;border-color:#16a34a;box-shadow:0 2px 8px #16a34a26;transform:translateX(-4px)}.resource-icon{align-items:center;background:linear-gradient(135deg,#dcfce7,#bbf7d0);border-radius:6px;color:#16a34a;display:flex;flex-shrink:0;font-size:20px;height:40px;justify-content:center;width:40px}.resource-info{flex:1 1;min-width:0}.resource-title{color:#1f2937;font-size:14px;font-weight:600;margin-bottom:4px;word-break:break-word}.resource-meta{color:#6b7280;display:flex;font-size:12px;gap:8px}.resource-meta span{display:inline-block}.download-icon{color:#16a34a;flex-shrink:0;font-size:16px;margin-top:2px}@media (min-width:769px){.player-mobile-header,.sidebar-overlay{display:none!important}.course-player-container{flex-direction:row}.course-player-content{flex:1 1;margin-left:250px}.player-main-content{padding:32px}.back-to-course-link{margin-bottom:24px}.media-player-container{min-height:600px}.content-section-wrapper{height:600px;width:600px}}@media (max-width:1024px) and (min-width:769px){.content-section-wrapper{height:550px;width:550px}}@media (max-width:768px){.player-mobile-header{display:flex!important}.sidebar-overlay{display:block!important}.course-player-content{width:100%}.player-main-content{padding:16px}.back-to-course-link{font-size:12px;margin-bottom:16px;padding:8px 12px}.lesson-header{padding:16px}.media-player-container{margin:16px 0;min-height:400px}.content-section-wrapper{height:400px;width:100%}.bottom-controls{flex-wrap:wrap;gap:8px;padding:12px 16px}.lesson-header-content{flex-direction:column;gap:12px}.lesson-header-actions{width:100%}.action-btn{font-size:12px;padding:8px 12px}.action-btn span{display:none}.action-btn i{font-size:16px}.floating-objectives-panel{right:-100%;width:100%}.floating-objectives-panel.open{right:0}.floating-objectives-list{padding:16px}.floating-objectives-list li{margin-bottom:14px}}@media (max-width:575px){.player-main-content{padding:12px}.back-to-course-link{font-size:12px;margin-bottom:12px;padding:8px 12px}.lesson-header{margin-bottom:12px;padding:12px}.bottom-controls{flex-direction:column;gap:8px}.controls-left,.controls-right{justify-content:space-between;width:100%}.nav-btn{padding:8px 12px}.lesson-counter,.nav-btn{font-size:12px}.complete-btn{width:100%}.media-player-container{min-height:320px}.content-section-wrapper{height:320px;width:100%}.floating-objectives-panel{width:100%}}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.student-subscriptions{background:linear-gradient(160deg,#f0f9ff,#e0f2fe 50%,#f0f9ff);border-radius:12px;min-height:100vh;padding:1.5rem}.student-subscriptions .subscription-header{border-bottom:2px solid #3b82f626;color:#1a1a1a;font-size:clamp(1.5rem,2.5vw,2rem);font-weight:800;letter-spacing:-.01em;margin-bottom:1.5rem;padding-bottom:1rem}.student-subscriptions .subscription-header i{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#3b82f6,#06b6d4);-webkit-background-clip:text;background-clip:text}.student-subscriptions .nav-tabs{border-bottom:1px solid #3b82f61a}.student-subscriptions .nav-tabs .nav-link{border:none;border-radius:10px 10px 0 0;color:#6b7280;font-weight:600;padding:.75rem 1.25rem;transition:all .25s cubic-bezier(.4,0,.2,1)}.student-subscriptions .nav-tabs .nav-link:hover{background:#3b82f60d;color:#3b82f6}.student-subscriptions .nav-tabs .nav-link.active{background:linear-gradient(135deg,#3b82f6,#06b6d4);border:none;box-shadow:0 2px 8px #3b82f640;color:#fff}.student-subscriptions .plans-grid{grid-gap:1.5rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));margin-top:1.5rem}.student-subscriptions .plan-card{background:#fff;border:1px solid #3b82f614;border-radius:16px;box-shadow:0 1px 4px #3b82f60f,0 4px 12px #3b82f60a;display:flex;flex-direction:column;padding:1.75rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.student-subscriptions .plan-card:hover{border-color:#3b82f62e;box-shadow:0 4px 16px #3b82f61f,0 8px 24px #3b82f60f;transform:translateY(-4px)}.plan-header{align-items:flex-start;display:flex;justify-content:space-between;margin-bottom:1rem}.student-subscriptions .plan-header h5{color:#1a1a1a;font-size:1.35rem;font-weight:700;margin:0}.student-subscriptions .plan-description{color:#6b7280;font-size:.9rem;margin-bottom:1.25rem;min-height:40px}.plan-price{border-bottom:none;border-top:none;margin:0;padding:0}.student-subscriptions .price-main{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#3b82f6,#06b6d4);-webkit-background-clip:text;background-clip:text;font-size:2.5rem;font-weight:800;line-height:1}.student-subscriptions .price-duration{color:#6b7280;font-size:.9rem;margin-top:.5rem}.price-discount{color:#6c757d;font-size:.85rem;margin-top:.5rem;text-decoration:line-through}.student-subscriptions .plan-features{flex-grow:1;list-style:none;margin:1.25rem 0;padding:0}.student-subscriptions .feature{color:#374151;font-size:.9rem;padding:.5rem 0}.feature i{font-size:1rem}.student-subscriptions .plan-card .btn{border-radius:10px;font-size:.9rem;font-weight:600;margin-top:auto;min-height:44px;padding:.7rem 1.25rem;transition:all .25s cubic-bezier(.4,0,.2,1)}.student-subscriptions .plan-card .btn-primary{background:linear-gradient(135deg,#3b82f6,#06b6d4);border:none;box-shadow:0 2px 8px #3b82f640}.student-subscriptions .plan-card .btn-primary:hover:not(:disabled){background:linear-gradient(135deg,#2563eb,#0891b2);box-shadow:0 6px 16px #3b82f659;transform:translateY(-2px)}.student-subscriptions .plan-card .btn-secondary{background:#3b82f614;border:1px solid #3b82f626;color:#3b82f6}.student-subscriptions .plan-card .btn:disabled{cursor:not-allowed;opacity:.6}.student-subscriptions .subscription-card{background:#fff;border:1px solid #3b82f614;border-radius:16px;box-shadow:0 1px 4px #3b82f60f,0 4px 12px #3b82f60a;overflow:hidden;position:relative;transition:all .3s cubic-bezier(.4,0,.2,1)}.student-subscriptions .subscription-card:before{background:linear-gradient(90deg,#3b82f6,#06b6d4);content:"";height:3px;left:0;position:absolute;right:0;top:0}.student-subscriptions 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