@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@300;400;500;600;700;800&display=swap";:root{--bg-primary:#08080a;--bg-secondary:#111115;--bg-card:#18181f;--bg-hover:#22222b;--primary:#e60000;--primary-rgb:230, 0, 0;--primary-hover:#ff1a1a;--text-main:#fff;--text-muted:#a3a3b3;--border-color:#262633;--glass-bg:#111115bf;--glass-border:#ffffff14;--font-sans:"Outfit", "Inter", system-ui, -apple-system, sans-serif;--transition-smooth:all .3s cubic-bezier(.4, 0, .2, 1);--shadow-lg:0 10px 30px -10px #000000b3;--shadow-primary:0 0 20px #e600004d}*{box-sizing:border-box;font-family:var(--font-sans);margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5;overflow-x:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:#2a2a35;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary)}#root{background-color:var(--bg-primary);flex-direction:column;min-height:100vh;display:flex}a{color:inherit;text-decoration:none}button,input,textarea,select{font-family:inherit}button{cursor:pointer;transition:var(--transition-smooth);background:0 0;border:none}input,textarea,select{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-main);transition:var(--transition-smooth);border-radius:6px;outline:none;padding:10px 14px}input:focus,textarea:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 2px #e6000033}.container{width:100%;max-width:1400px;margin:0 auto;padding:0 2rem}@media (width<=768px){.container{padding:0 1rem}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-glow{0%,to{box-shadow:0 0 10px #e6000033}50%{box-shadow:0 0 20px #e6000080}}.animate-fade-in{animation:.4s ease-out forwards fadeIn}.navbar{z-index:100;background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--glass-border);height:70px;transition:var(--transition-smooth);align-items:center;display:flex;position:sticky;top:0}.navbar-container{justify-content:space-between;align-items:center;width:100%;display:flex}@media (width<=768px){.navbar{height:auto;padding:10px 0}.navbar-container{flex-wrap:wrap;justify-content:flex-start;gap:16px}.logo-container{font-size:1.1rem}.user-menu{gap:8px}.user-menu>span{display:none}.nav-links{border-top:1px solid var(--border-color);order:3;justify-content:space-around;gap:10px;width:100%;margin-top:4px;padding-top:8px}.nav-link{padding:4px 8px;font-size:.85rem}}.logo-container{letter-spacing:-.5px;align-items:center;gap:10px;font-size:1.5rem;font-weight:800;display:flex}.logo-wave{color:var(--primary);font-weight:900}.logo-text{text-transform:uppercase;color:var(--text-main);align-items:center;display:flex}.logo-dot{background-color:var(--primary);border-radius:50%;width:10px;height:10px;margin:0 1px;display:inline-block}.nav-links{align-items:center;gap:20px;display:flex}.nav-link{color:var(--text-muted);transition:var(--transition-smooth);border-radius:4px;padding:6px 12px;font-size:.95rem;font-weight:500}.nav-link:hover,.nav-link.active{color:var(--text-main);background-color:#ffffff0d}.user-menu{align-items:center;gap:15px;display:flex}.role-badge{text-transform:uppercase;letter-spacing:.5px;border-radius:4px;padding:3px 8px;font-size:.75rem;font-weight:700}.role-badge.admin{color:#f33;background:#e6000026;border:1px solid #e600004d}.role-badge.editor{color:#33a8ff;background:#0096ff26;border:1px solid #0096ff4d}.role-badge.student{color:#2ecc71;background:#2ecc7126;border:1px solid #2ecc714d}.btn-signout{color:var(--text-muted);background:0 0;border-radius:4px;align-items:center;gap:6px;padding:6px 12px;font-size:.9rem;font-weight:500;display:flex}.btn-signout:hover{color:var(--primary);background:#e600000d}.login-page{background:radial-gradient(circle at center, #1b1212 0%, var(--bg-primary) 100%);box-sizing:border-box;justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card{background:var(--bg-card);border:1px solid var(--border-color);width:100%;max-width:360px;box-shadow:var(--shadow-lg);box-sizing:border-box;border-radius:12px;padding:30px;animation:.5s ease-out fadeIn}@media (width<=480px){.login-card{padding:20px}}.login-logo{text-align:center;margin-bottom:20px;font-size:2.2rem;font-weight:800}.login-logo .logo-wave{font-size:2.5rem}.login-card h2{color:var(--text-main);text-align:center;margin-bottom:20px;font-size:1.5rem;font-weight:600}.login-form{flex-direction:column;gap:18px;display:flex}.form-group{flex-direction:column;gap:8px;display:flex}.form-group label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-size:.85rem;font-weight:600}.btn-primary{background-color:var(--primary);color:#fff;border:1px solid #0000;border-radius:6px;justify-content:center;align-items:center;gap:10px;padding:12px;font-size:1rem;font-weight:700;display:flex}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);box-shadow:var(--shadow-primary)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.demo-credentials{border-top:1px solid var(--border-color);margin-top:30px;padding-top:20px}.demo-title{color:var(--text-muted);text-transform:uppercase;text-align:center;letter-spacing:.5px;margin-bottom:12px;font-size:.8rem;font-weight:700}.demo-buttons{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.btn-demo{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-muted);text-transform:uppercase;border-radius:4px;padding:8px;font-size:.75rem;font-weight:600}.btn-demo:hover{border-color:var(--primary);color:var(--text-main);background:#e600000d}.hero-banner{border-bottom:1px solid var(--border-color);background-position:50%;background-size:cover;align-items:flex-end;width:100%;height:550px;margin-bottom:40px;display:flex;position:relative}.hero-overlay{background:linear-gradient(to bottom, #08080a1a 0%, #08080a99 60%, var(--bg-primary) 100%);position:absolute;inset:0}.hero-content{z-index:10;width:100%;max-width:800px;padding-bottom:60px;position:relative}.hero-tag{background-color:var(--primary);color:#fff;text-transform:uppercase;letter-spacing:.5px;border-radius:4px;width:fit-content;margin-bottom:15px;padding:4px 10px;font-size:.75rem;font-weight:800}.hero-title{color:#fff;text-shadow:2px 2px 4px #000c;margin-bottom:15px;font-size:3.5rem;font-weight:800;line-height:1.1}.hero-desc{color:#e5e5e5;text-shadow:1px 1px 3px #000c;max-width:600px;margin-bottom:25px;font-size:1.1rem}.hero-buttons{gap:15px;display:flex}.btn-large{border-radius:6px;align-items:center;gap:10px;padding:12px 28px;font-size:1.05rem;font-weight:700;display:flex}.btn-large.primary{color:#000;background-color:#fff}.btn-large.primary:hover{background-color:#e5e5e5;transform:scale(1.03)}.btn-large.secondary{color:#fff;background-color:#6d6d6eb3}.btn-large.secondary:hover{background-color:#6d6d6ee6;transform:scale(1.03)}@media (width<=768px){.hero-banner{border-radius:8px;height:300px;margin-bottom:25px;overflow:hidden}.hero-content{padding:0 15px 20px}.hero-title{margin-bottom:6px;font-size:1.6rem}.hero-desc{line-clamp:2;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:15px;font-size:.85rem;display:-webkit-box;overflow:hidden}.btn-large{padding:10px 18px;font-size:.9rem}.btn-large svg{width:16px;height:16px}}.category-row{margin-bottom:40px;position:relative}.category-title{color:#fff;align-items:center;gap:8px;margin-bottom:15px;font-size:1.4rem;font-weight:700;display:flex}.category-title-line{background-color:var(--primary);border-radius:2px;width:4px;height:18px}.slider-wrapper{position:relative;overflow:hidden}.slider-container{scroll-behavior:smooth;scrollbar-width:none;gap:20px;padding:10px 0 25px;display:flex;overflow-x:auto}.slider-container::-webkit-scrollbar{display:none}.slider-arrow{color:#fff;border:1px solid var(--border-color);z-index:20;width:40px;height:50px;transition:var(--transition-smooth);background:#000000b3;justify-content:center;align-items:center;display:flex;position:absolute;top:calc(50% - 25px)}.slider-arrow:hover{background:var(--primary);border-color:var(--primary)}.slider-arrow.left{border-radius:0 6px 6px 0;left:0}.slider-arrow.right{border-radius:6px 0 0 6px;right:0}.lesson-card{background:var(--bg-card);border:1px solid 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0;font-size:.85rem;font-style:italic}.comments-section{flex-direction:column;gap:25px;display:flex}.comment-input-area{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;flex-direction:column;gap:12px;padding:20px;display:flex}.comment-textarea{resize:vertical;background:var(--bg-primary);width:100%;height:100px}.comment-actions{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:15px;display:flex}.file-attach-label{color:var(--text-muted);cursor:pointer;background:var(--bg-primary);border:1px solid var(--border-color);transition:var(--transition-smooth);border-radius:4px;align-items:center;gap:8px;padding:6px 12px;font-size:.85rem;display:flex}.file-attach-label:hover{color:#fff;border-color:var(--primary)}.attached-file-preview{background:#e600001a;border:1px solid #e600004d;border-radius:4px;align-items:center;gap:8px;padding:4px 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5px;font-size:.7rem;font-weight:800}.comment-date{color:var(--text-muted);font-size:.8rem}.comment-text{color:#e5e5e5;white-space:pre-wrap;font-size:.9rem;line-height:1.5}.comment-attachments{flex-wrap:wrap;gap:10px;margin-top:10px;display:flex}.comment-attachment-item{background:var(--bg-secondary);border:1px solid var(--border-color);color:#fff;transition:var(--transition-smooth);border-radius:4px;align-items:center;gap:8px;padding:6px 12px;font-size:.8rem;display:inline-flex}.comment-attachment-item:hover{border-color:var(--primary);background:#e600000d}.comment-delete-btn{color:var(--text-muted);position:absolute;top:20px;right:20px}.comment-delete-btn:hover{color:var(--primary)}.custom-player-wrapper{aspect-ratio:16/9;width:100%;box-shadow:var(--shadow-lg);border:1px solid var(--border-color);background-color:#000;border-radius:10px;position:relative;overflow:hidden}.yt-iframe-container{pointer-events:none;width:100%;height:100%;position:relative;overflow:hidden}.yt-iframe-container iframe,.yt-iframe-container #yt-player-placeholder{border:none;width:100%;height:100%;position:absolute;top:0;left:0}.player-click-protection{z-index:5;cursor:pointer;background:0 0;width:100%;height:100%;position:absolute;top:0;left:0}.player-controls-overlay{z-index:10;opacity:0;pointer-events:none;background:linear-gradient(#0000 0%,#000000b3 40%,#000000f2 100%);flex-direction:column;justify-content:flex-end;height:70px;padding:0 15px 10px;transition:opacity .3s;display:flex;position:absolute;bottom:0;left:0;right:0}.custom-player-wrapper:hover .player-controls-overlay,.custom-player-wrapper.paused .player-controls-overlay{opacity:1;pointer-events:auto}.player-progressbar-container{cursor:pointer;background:#fff3;border-radius:2px;width:100%;height:5px;margin-bottom:12px;transition:height .1s;position:relative}.player-progressbar-container:hover{height:8px}.player-progressbar-loaded{background:#ffffff4d;border-radius:2px;height:100%;position:absolute;top:0;left:0}.player-progressbar-current{background:var(--primary);height:100%;box-shadow:0 0 10px var(--primary);border-radius:2px;position:absolute;top:0;left:0}.player-controls-row{justify-content:space-between;align-items:center;width:100%;display:flex}.player-controls-left,.player-controls-right{align-items:center;gap:15px;display:flex}.player-btn{color:#fff;border-radius:50%;justify-content:center;align-items:center;padding:5px;transition:transform .1s;display:flex}.player-btn:hover{color:var(--primary);transform:scale(1.1)}.player-time{color:#fff;font-size:.8rem;font-weight:500}.volume-container{align-items:center;gap:8px;display:flex}.volume-slider{appearance:none;cursor:pointer;background:#ffffff4d;border:none;border-radius:2px;outline:none;width:60px;height:4px;padding:0}.volume-slider::-webkit-slider-thumb{appearance:none;background:#fff;border-radius:50%;width:10px;height:10px}.volume-slider::-webkit-slider-thumb:hover{background:var(--primary)}.volume-slider::-moz-range-thumb{background:#fff;border:none;border-radius:50%;width:10px;height:10px}.volume-slider::-moz-range-thumb:hover{background:var(--primary)}.player-loader,.player-placeholder{z-index:8;background:#000;flex-direction:column;justify-content:center;align-items:center;gap:15px;display:flex;position:absolute;inset:0}.player-placeholder-icon{color:var(--primary);font-size:3rem}.spinner{border:4px solid #ffffff1a;border-left-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.admin-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;display:flex}.admin-header h1{font-size:1.8rem;font-weight:800}.admin-tabs{border-bottom:1px solid var(--border-color);gap:15px;margin-bottom:25px;display:flex}.admin-tab{color:var(--text-muted);padding:10px 20px;font-size:.95rem;font-weight:600;position:relative}.admin-tab:hover{color:#fff}.admin-tab.active{color:var(--primary)}.admin-tab.active:after{content:"";background-color:var(--primary);height:2px;position:absolute;bottom:-1px;left:0;right:0}.admin-content-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:8px;padding:25px}.section-title-row{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.section-title-row h2{font-size:1.25rem;font-weight:700}.table-wrapper{overflow-x:auto}.admin-table{border-collapse:collapse;text-align:left;width:100%}.admin-table th{color:var(--text-muted);text-transform:uppercase;border-bottom:1px solid var(--border-color);padding:14px;font-size:.85rem;font-weight:700}.admin-table td{border-bottom:1px solid var(--border-color);padding:14px;font-size:.9rem}.admin-table tr:hover td{background:#ffffff03}.actions-cell{gap:8px;display:flex}.btn-icon-only{color:var(--text-muted);border-radius:4px;padding:6px}.btn-icon-only:hover{color:#fff;background:#ffffff0d}.btn-icon-only.delete:hover{color:var(--primary);background:#e600000d}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:9999;background:#000c;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-card{background:var(--bg-card);border:1px solid var(--border-color);width:100%;max-width:600px;box-shadow:var(--shadow-lg);border-radius:10px;flex-direction:column;animation:.3s cubic-bezier(.165,.84,.44,1) fadeIn;display:flex}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:20px;display:flex}.modal-header h3{color:#fff;font-size:1.2rem;font-weight:700}.modal-body{padding:20px}.modal-footer{border-top:1px solid var(--border-color);justify-content:flex-end;gap:12px;padding:15px 20px;display:flex}@media (width<=768px){.modal-overlay{align-items:center;padding:10px}.modal-card{flex-direction:column;width:95%;max-height:80vh;display:flex;overflow:hidden}.modal-card form{flex-direction:column;flex:1;min-height:0;display:flex;overflow:hidden}.modal-body{flex:1;padding:15px;overflow-y:auto}.modal-footer{padding:12px 15px}}.btn-secondary{border:1px solid var(--border-color);color:#fff;background:#ffffff0d;border-radius:6px;padding:8px 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