:root{--bg-primary: #0a0f1c;--bg-secondary: #161e2d;--bg-tertiary: #232d3f;--bg-card: rgba(30, 41, 59, .7);--bg-glass: rgba(15, 23, 42, .8);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--text-inverse: #ffffff;--primary-color: #3b82f6;--primary-rgb: 59, 130, 246;--primary-hover: #60a5fa;--accent-color: #8b5cf6;--success-color: #10b981;--warning-color: #f59e0b;--error-color: #ef4444;--border-color: rgba(255, 255, 255, .08);--shadow-lg: 0 12px 32px rgba(0, 0, 0, .4);--gradient-primary: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);--gradient-secondary: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);--border-radius: 12px;--border-radius-lg: 20px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-2xl: 48px;--transition-fast: .15s ease;--transition-normal: .25s ease;--error: #ef4444}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f8fafc;--bg-tertiary: #e2e8f0;--bg-card: #ffffff;--bg-glass: rgba(255, 255, 255, .95);--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--text-inverse: #ffffff;--primary-color: #2563eb;--primary-hover: #1d4ed8;--accent-color: #dc2626;--accent-hover: #b91c1c;--highlight-color: #f59e0b;--highlight-hover: #d97706;--success-color: #10b981;--border-color: rgba(0, 0, 0, .08);--border-hover: rgba(37, 99, 235, .3);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 40px rgba(0, 0, 0, .12);--shadow-xl: 0 20px 60px rgba(0, 0, 0, .15);--shadow-glow: 0 0 30px rgba(37, 99, 235, .3);--shadow-red-glow: 0 0 25px rgba(220, 38, 38, .25);--shadow-gold-glow: 0 0 25px rgba(245, 158, 11, .3);--gradient-primary: linear-gradient(135deg, #3b82f6 0%, #2563eb 50%, #1d4ed8 100%);--gradient-accent: linear-gradient(135deg, #ef4444 0%, #dc2626 50%, #b91c1c 100%);--gradient-gold: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);--gradient-secondary: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);--gradient-shine: linear-gradient(135deg, rgba(255, 255, 255, .4) 0%, transparent 100%)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;outline:none}input,textarea,select{font-family:inherit;outline:none}img{max-width:100%;display:block}ul,ol{list-style:none}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2}h1{font-size:clamp(2rem,5vw,3.5rem)}h2{font-size:clamp(1.5rem,4vw,2.5rem)}h3{font-size:clamp(1.25rem,3vw,1.75rem)}h4{font-size:1.25rem}h5{font-size:1rem}h6{font-size:.875rem}.text-gradient{color:#fff}.container{width:100%;max-width:1280px;margin:0 auto;padding:0 var(--spacing-lg)}.page{flex:1;padding:var(--spacing-xl) 0}.page-with-sidebar{display:grid;grid-template-columns:1fr 300px;gap:var(--spacing-xl);max-width:1400px;margin:0 auto;padding:var(--spacing-xl) var(--spacing-lg)}.main-content{min-width:0}.sidebar-ads{position:sticky;top:100px;height:fit-content}.sidebar-ads h3{font-size:1rem;margin-bottom:var(--spacing-md);color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px}.sidebar-video-list{display:flex;flex-direction:column;gap:var(--spacing-md)}.sidebar-video-item{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);overflow:hidden;cursor:pointer;transition:all var(--transition-fast)}.sidebar-video-item:hover{border-color:var(--text-secondary);transform:translate(-4px)}.sidebar-video-thumb{position:relative;aspect-ratio:16/9}.sidebar-video-thumb img{width:100%;height:100%;object-fit:cover}.sidebar-video-thumb:after{content:"▶";position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#00000080;color:#fff;font-size:1.5rem;opacity:0;transition:opacity var(--transition-fast)}.sidebar-video-item:hover .sidebar-video-thumb:after{opacity:1}.sidebar-video-info{padding:var(--spacing-sm)}.sidebar-video-title{font-size:.8125rem;font-weight:500;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;line-clamp:2;overflow:hidden}@media (max-width: 1024px){.page-with-sidebar{grid-template-columns:1fr}.sidebar-ads{position:static;display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--spacing-md)}.sidebar-ads h3{grid-column:1 / -1}.sidebar-video-list{display:contents}}.section{margin-bottom:var(--spacing-2xl)}.grid{display:grid;gap:var(--spacing-lg)}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.grid-4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.flex{display:flex;gap:var(--spacing-md)}.flex-column{display:flex;flex-direction:column}.flex-1{flex:1}.flex-wrap{flex-wrap:wrap}.flex-center{display:flex;align-items:center;justify-content:center}.flex-between{display:flex;align-items:center;justify-content:space-between}.card{background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:var(--spacing-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:all var(--transition-normal)}[data-theme=light] .card{background:#fff;box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--text-secondary)}[data-theme=light] .card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.card-header{margin-bottom:var(--spacing-md)}.card-title{font-size:1.25rem;font-weight:600;margin-bottom:var(--spacing-xs)}[data-theme=light] .card-title{color:var(--text-primary)}.card-subtitle{color:var(--text-secondary);font-size:.875rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--border-radius);font-weight:500;font-size:.9375rem;transition:all var(--transition-fast);white-space:nowrap;position:relative;overflow:hidden}.btn:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--gradient-shine);opacity:0;transition:opacity var(--transition-fast)}.btn:hover:before{opacity:1}.btn-primary{background:var(--gradient-primary);color:var(--text-inverse);box-shadow:0 4px 14px #3b82f64d}[data-theme=light] .btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md);border:none}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #3b82f666;filter:brightness(1.1)}[data-theme=light] .btn-primary:hover{box-shadow:var(--shadow-glow);transform:translateY(-3px)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}[data-theme=light] .btn-secondary{background:#fff;box-shadow:var(--shadow-sm);border:2px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-glass);border-color:var(--text-secondary)}[data-theme=light] .btn-secondary:hover{border-color:var(--primary-color);box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn-outline{background:transparent;color:var(--text-primary);border:2px solid var(--text-primary)}[data-theme=light] .btn-outline{border-color:var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background:var(--text-primary);color:var(--bg-primary)}[data-theme=light] .btn-outline:hover{background:var(--primary-color);color:#fff;box-shadow:var(--shadow-glow)}.btn-info{background:#3b82f61a;color:#60a5fa;border:1px solid rgba(59,130,246,.2)}.btn-info:hover{background:#3b82f633;color:#fff;border-color:#3b82f6}.btn-success{background:#10b9811a;color:#34d399;border:1px solid rgba(16,185,129,.2)}.btn-success:hover{background:#10b98133;color:#fff;border-color:#10b981}.btn-danger{background:#ef44441a;color:#f87171;border:1px solid rgba(239,68,68,.2)}.btn-danger:hover{background:#ef444433;color:#fff;border-color:#ef4444}[data-theme=light] .btn-info{background:#e0f2fe;color:#0369a1;border:none}[data-theme=light] .btn-success{background:#dcfce7;color:#15803d;border:none}[data-theme=light] .btn-danger{background:#fee2e2;color:#b91c1c;border:none}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-glass)}[data-theme=light] .btn-ghost:hover{background:var(--bg-secondary);color:var(--primary-color)}.btn-lg{padding:var(--spacing-md) var(--spacing-xl)}.btn-sm{padding:var(--spacing-xs) var(--spacing-md);font-size:.8125rem}.btn-icon{width:40px;height:40px;padding:0;border-radius:50%}.form-group{margin-bottom:var(--spacing-md)}.form-label{display:block;margin-bottom:4px;font-weight:500;color:var(--text-secondary);font-size:.85rem}[data-theme=light] .form-label{color:var(--text-primary);font-weight:600}.form-input,.form-select,.form-textarea{width:100%;padding:.5rem .75rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-primary);font-size:.9rem;transition:all var(--transition-fast);position:relative;z-index:1}.form-input-compact{padding:var(--spacing-sm) var(--spacing-md)}.card-colorful-bg{background:linear-gradient(135deg,#ffffffe6,#f0f9ffe6);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.5);box-shadow:0 4px 15px #0000000d}[data-theme=light] .form-input,[data-theme=light] .form-select,[data-theme=light] .form-textarea{background:#fff;border:2px solid var(--border-color);box-shadow:var(--shadow-sm)}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--text-secondary);box-shadow:0 0 0 3px #ffffff1a}[data-theme=light] .form-input:focus,[data-theme=light] .form-select:focus,[data-theme=light] .form-textarea:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a;outline:none}.form-input::placeholder{color:var(--text-muted)}.form-textarea{min-height:120px;resize:vertical}.form-select{cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23AAAAAA' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:18px;padding-right:44px}.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.badge-primary{background:var(--primary-color);color:var(--text-inverse);border:none}.badge-ghost{background:#94a3b81a;color:var(--text-secondary);border:1px solid rgba(148,163,184,.2)}.badge-info{background:#3b82f61a;color:#60a5fa;border:1px solid rgba(59,130,246,.2)}.badge-success{background:#10b9811a;color:#34d399;border:1px solid rgba(16,185,129,.2)}.badge-warning{background:#f59e0b1a;color:#fbbf24;border:1px solid rgba(245,158,11,.2)}.badge-danger{background:#ef44441a;color:#f87171;border:1px solid rgba(239,68,68,.2)}[data-theme=light] .badge-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-sm)}[data-theme=light] .badge-ghost{background:#f1f5f9;color:#475569;border:none}[data-theme=light] .badge-info{background:#e0f2fe;color:#0369a1;border:none}[data-theme=light] .badge-success{background:#dcfce7;color:#15803d;border:none}[data-theme=light] .badge-warning{background:#fef9c3;color:#a16207;border:none}[data-theme=light] .badge-danger{background:#fee2e2;color:#b91c1c;border:none}.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:var(--spacing-lg);position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}.stat-card:before{content:"";position:absolute;top:0;right:0;width:100px;height:100px;background:var(--bg-glass);border-radius:50%;transform:translate(30%,-30%)}.stat-value{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.stat-label{color:var(--text-secondary);font-size:.875rem}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--text-secondary)}.empty-state svg{width:64px;height:64px;margin-bottom:var(--spacing-md);opacity:.5}.empty-state h3{margin-bottom:var(--spacing-sm);color:var(--text-primary)}.spinner{width:40px;height:40px;border:3px solid var(--bg-tertiary);border-top-color:var(--text-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000f2;display:flex;align-items:center;justify-content:center;z-index:9999}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000f2;display:flex;align-items:center;justify-content:center;padding:var(--spacing-lg);z-index:99999;animation:fadeIn var(--transition-fast)}.modal{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);width:100%;max-width:500px;max-height:90vh;overflow-y:auto;animation:slideUp var(--transition-normal);position:relative;z-index:100000}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-lg);border-bottom:1px solid var(--border-color)}.modal-title{font-size:1.25rem;font-weight:600}.modal-body{padding:var(--spacing-lg)}.modal-footer{display:flex;justify-content:flex-end;gap:var(--spacing-md);padding:var(--spacing-lg);border-top:1px solid var(--border-color)}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.table-container{overflow-x:auto;border-radius:var(--border-radius);border:1px solid var(--border-color)}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:var(--spacing-md);text-align:left;border-bottom:1px solid var(--border-color)}.table th{background:var(--bg-tertiary);font-weight:600;color:var(--text-secondary);font-size:.875rem;text-transform:uppercase;letter-spacing:.5px}.table tr:hover td{background:var(--bg-glass)}.tabs{display:flex;gap:var(--spacing-xs);background:var(--bg-tertiary);padding:var(--spacing-xs);border-radius:var(--border-radius);margin-bottom:var(--spacing-lg);overflow-x:auto}.tab{flex:1;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--border-radius);background:transparent;color:var(--text-secondary);font-weight:500;transition:all var(--transition-fast);white-space:nowrap}.tab:hover{color:var(--text-primary)}.tab.active{background:var(--primary-color);color:var(--text-inverse);box-shadow:0 4px 12px #3b82f633}.toast-container{position:fixed;bottom:var(--spacing-lg);right:var(--spacing-lg);z-index:9999;display:flex;flex-direction:column;gap:var(--spacing-sm)}.toast{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:var(--spacing-md) var(--spacing-lg);display:flex;align-items:center;gap:var(--spacing-md);min-width:300px;max-width:400px;animation:slideIn var(--transition-normal);box-shadow:var(--shadow-lg)}.toast.success,.toast.error,.toast.warning,.toast.info{border-left:4px solid var(--text-secondary)}@keyframes slideIn{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.navbar{position:sticky;top:0;z-index:100;background:var(--bg-primary);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);padding:var(--spacing-md) 0;transition:background-color .3s ease,border-color .3s ease}[data-theme=light] .navbar{background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:var(--shadow-sm);border-bottom:1px solid var(--border-color)}.navbar-content{display:flex;align-items:center;justify-content:space-between}.navbar-brand{display:flex;align-items:center;gap:var(--spacing-sm);font-family:Poppins,sans-serif;font-size:1.5rem;font-weight:700;color:var(--text-primary);letter-spacing:-.01em}[data-theme=light] .navbar-brand{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-brand svg{width:40px;height:40px}.navbar-nav{display:flex;align-items:center;gap:var(--spacing-lg)}.nav-link{color:var(--text-secondary);font-weight:500;transition:color var(--transition-fast);position:relative}.nav-link:hover,.nav-link.active{color:var(--text-primary)}[data-theme=light] .nav-link:hover,[data-theme=light] .nav-link.active{color:var(--primary-color)}.nav-link.active:after{content:"";position:absolute;bottom:-8px;left:0;right:0;height:2px;background:var(--text-primary);border-radius:2px}[data-theme=light] .nav-link.active:after{background:var(--gradient-primary)}.navbar-mobile-toggle{display:none;background:transparent;color:var(--text-primary)}.footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:0 0 var(--spacing-md);margin-top:auto;position:relative;overflow:hidden}.footer-wave{position:absolute;top:-1px;left:0;right:0;height:50px;overflow:hidden;transform:rotate(180deg)}.footer-wave svg{width:100%;height:100%}.footer-wave-path{fill:var(--bg-primary)}.footer-orbs{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.footer-orb{position:absolute;border-radius:50%;opacity:.08;filter:blur(60px)}.footer-orb.orb-1{width:300px;height:300px;background:linear-gradient(135deg,#3b82f6,#8b5cf6);top:-50px;left:10%;animation:floatOrb 8s ease-in-out infinite}.footer-orb.orb-2{width:200px;height:200px;background:linear-gradient(135deg,#f59e0b,#ef4444);bottom:-30px;right:15%;animation:floatOrb 6s ease-in-out infinite reverse}.footer-orb.orb-3{width:150px;height:150px;background:linear-gradient(135deg,#10b981,#3b82f6);top:50%;left:50%;transform:translate(-50%,-50%);animation:floatOrb 10s ease-in-out infinite}@keyframes floatOrb{0%,to{transform:translateY(0) scale(1)}50%{transform:translateY(-20px) scale(1.1)}}.footer-content{position:relative;z-index:1;padding-top:60px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:var(--spacing-xl);margin-bottom:var(--spacing-lg)}.footer-brand{font-size:1.25rem;font-weight:700;margin-bottom:var(--spacing-sm);background:linear-gradient(135deg,var(--text-primary) 0%,var(--text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.footer-desc{color:var(--text-secondary);margin-bottom:var(--spacing-md);max-width:280px;font-size:.8125rem;line-height:1.6}.footer-social{display:flex;gap:var(--spacing-sm)}.footer-social a{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary);border-radius:50%;color:var(--text-secondary);transition:all var(--transition-fast);border:1px solid transparent}.footer-social a:hover{background:linear-gradient(135deg,#3b82f6,#8b5cf6);color:#fff;transform:translateY(-3px) scale(1.1);border-color:#fff3;box-shadow:0 4px 15px #3b82f666}.footer-title{font-weight:600;font-size:.875rem;margin-bottom:var(--spacing-sm);color:var(--text-primary);text-transform:uppercase;letter-spacing:.5px}.footer-links{display:flex;flex-direction:column;gap:6px}.footer-links a,.footer-links span{color:var(--text-secondary);font-size:.8125rem;transition:color var(--transition-fast),transform var(--transition-fast)}.footer-links a:hover{color:var(--text-primary);transform:translate(4px)}.footer-links .admin-login-link{margin-top:var(--spacing-sm);font-size:.75rem;opacity:.7;transition:opacity var(--transition-fast)}.footer-links .admin-login-link:hover{opacity:1}.footer-bottom{padding-top:var(--spacing-md);border-top:1px solid var(--border-color);text-align:center;color:var(--text-muted);font-size:.75rem;position:relative}.footer-bottom:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:200px;height:2px;background:linear-gradient(90deg,transparent,#3b82f6,#8b5cf6,#f59e0b,transparent);border-radius:2px}[data-theme=light] .footer{background:linear-gradient(180deg,#f8fafc,#e2e8f0)}[data-theme=light] .footer-orb{opacity:.15}[data-theme=light] .footer-social a:hover{box-shadow:0 4px 20px #3b82f64d}.hero{padding:var(--spacing-2xl) 0;text-align:center;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at center,rgba(255,255,255,.02) 0%,transparent 50%);animation:pulse 8s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:.5}50%{transform:scale(1.1);opacity:.3}}.hero-content{position:relative;z-index:1}.hero h1{margin-bottom:var(--spacing-lg)}.hero-subtitle{font-size:1.25rem;color:var(--text-secondary);max-width:600px;margin:0 auto var(--spacing-xl)}.hero-buttons{display:flex;justify-content:center;gap:var(--spacing-md);flex-wrap:wrap}.course-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:var(--spacing-xl);text-align:center;cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden}.course-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--bg-glass);opacity:0;transition:opacity var(--transition-normal)}.course-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-glow);border-color:var(--text-secondary)}.course-card:hover:before{opacity:1}.course-card-content{position:relative;z-index:1}.course-icon{width:80px;height:80px;margin:0 auto 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1024px){.admin-sidebar{position:fixed;transform:translate(-100%)}.admin-sidebar.open{transform:translate(0)}.admin-sidebar-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:999}.admin-main-content{padding-left:0}}@media (min-width: 1025px){.sidebar-collapsed .admin-sidebar{width:80px}.sidebar-collapsed .nav-title,.sidebar-collapsed .brand-info,.sidebar-collapsed .brand-tagline{display:none}.sidebar-collapsed .admin-nav-item{justify-content:center;padding:var(--spacing-md)}.sidebar-collapsed .admin-sidebar-brand{justify-content:center}}.admin-page{padding:var(--spacing-xl) 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var(--border-color);background:var(--bg-primary);color:var(--text-primary);min-width:180px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000bf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:2000;padding:var(--spacing-md);animation:fadeIn .3s ease}.modal-content{width:100%;max-height:90vh;overflow-y:auto;position:relative;padding:var(--spacing-xl);animation:slideUp .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.admin-form .form-group{margin-bottom:var(--spacing-md)}.admin-form .form-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-md);margin-bottom:var(--spacing-md)}.admin-form label{display:block;font-weight:600;margin-bottom:6px;font-size:.875rem}.admin-form input,.admin-form select,.admin-form textarea{width:100%;padding:10px 14px;border-radius:10px;border:1px solid var(--border-color);background:var(--bg-primary);color:var(--text-primary);transition:all .2s ease}.admin-form input:focus,.admin-form select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f61a}@media (max-width: 640px){.admin-form .form-row{grid-template-columns:1fr}.admin-header{flex-direction:column;align-items:flex-start}}.exam-section-header{background:linear-gradient(135deg,var(--bg-hover) 0%,var(--bg-secondary) 100%);padding:var(--spacing-3xl) 0;border-bottom:1px solid var(--border-color);margin-bottom:var(--spacing-2xl)}.exam-controls-wrapper{margin-top:-60px;position:relative;z-index:10}.exam-card-v2{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:20px;padding:var(--spacing-lg);display:flex;align-items:center;gap:var(--spacing-lg);transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.exam-card-v2:after{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:var(--primary-color);opacity:0;transition:opacity .3s ease}.exam-card-v2:hover{transform:translateY(-5px);box-shadow:var(--shadow-xl);border-color:var(--primary-color)}.exam-card-v2:hover:after{opacity:1}.exam-icon-box{width:64px;height:64px;background:var(--bg-primary);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:2rem;box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.exam-type-badge{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--primary-color);display:inline-block;margin-bottom:6px}.exam-title-v2{font-size:1.25rem;font-weight:700;margin:0 0 8px;color:var(--text-primary)}.exam-meta-v2{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.meta-pill{font-size:.75rem;padding:4px 10px;background:var(--bg-primary);border-radius:6px;color:var(--text-secondary);border:1px solid var(--border-color)}.exam-action-v2{display:flex;align-items:center}@media (max-width: 768px){.exam-card-v2{flex-direction:column;text-align:center}.exam-icon-box{margin:0 auto}.exam-meta-v2{justify-content:center}}.admin-table{width:100%;border-collapse:collapse;text-align:left}.admin-table th{padding:var(--spacing-md);background:var(--bg-hover);font-weight:700;font-size:.8125rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);border-bottom:1px solid var(--border-color)}.admin-table td{padding:var(--spacing-md);border-bottom:1px solid var(--border-color);vertical-align:middle}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover{background:rgba(var(--primary-rgb),.02)}.badge{display:inline-block;padding:4px 10px;border-radius:6px;font-size:.75rem;font-weight:600}.badge-info{background:#3b82f61a;color:#3b82f6}.badge-ghost{background:var(--bg-hover);color:var(--text-secondary)}.badge-primary{background:var(--primary-color);color:#fff}.btn-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;padding:0;border:1px solid var(--border-color);background:transparent;cursor:pointer;transition:all .2s ease}.btn-icon:hover{background:var(--bg-hover);border-color:var(--primary-color);color:var(--primary-color)}.btn-ghost{background:transparent;border:1px solid transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-danger{background:#ef4444;color:#fff;border:none}.btn-danger:hover{background:#dc2626;box-shadow:0 4px 12px #ef44444d}.btn-info{background:#3b82f6;color:#fff;border:none}.btn-info:hover{background:#2563eb;box-shadow:0 4px 12px #3b82f64d}.exam-section-header{padding:var(--spacing-2xl) 0;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);margin-bottom:var(--spacing-xl);text-align:center}.hero-title{font-size:clamp(2.5rem,5vw,4rem);font-weight:800;margin-bottom:var(--spacing-md);color:var(--text-primary)}.hero-subtitle{font-size:1.125rem;color:var(--text-secondary);max-width:600px;margin:0 auto}.exam-controls-wrapper{margin-top:-60px;position:relative;z-index:5}.exam-controls{display:flex;flex-direction:column;gap:var(--spacing-lg)}.search-box .admin-form.input{width:100%;font-size:1.1rem;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:16px;padding:14px 24px;box-shadow:0 4px 12px #0000000d;transition:all .3s ease}.search-box .admin-form.input:focus{border-color:var(--primary-color);box-shadow:0 8px 24px rgba(var(--primary-rgb),.1);transform:translateY(-1px)}.filter-row{display:flex;justify-content:center;gap:var(--spacing-xl);flex-wrap:wrap}.filter-chips{display:flex;flex-direction:column;gap:var(--spacing-lg)}.filter-group{display:flex;flex-direction:column;align-items:center;gap:10px;width:280px}.filter-label{font-weight:700;color:var(--primary-color);font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;text-align:center}.filter-select-wrapper{position:relative;width:100%}.filter-select{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;font-size:.95rem;padding:10px 16px;padding-right:2.5rem;background-color:var(--bg-primary);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%234361ee' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .8rem center;background-size:1.1em;border:1px solid var(--border-color);border-radius:12px;color:var(--text-primary);font-weight:500;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 8px #0000000a}.filter-select:focus{border-color:var(--primary-color);background-color:var(--bg-tertiary);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.1)}.filter-select:hover{border-color:var(--primary-color);background-color:var(--bg-tertiary)}.chips-container{display:flex;gap:12px;row-gap:12px;flex-wrap:wrap;flex:1}.chip{padding:8px 18px;border-radius:50px;background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-secondary);font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1)}.chip:hover{border-color:var(--primary-color);color:var(--text-primary)}.chip.active{background:var(--primary-color);color:var(--text-inverse);border-color:var(--primary-color)}.segmented-control{display:inline-flex;background:var(--bg-tertiary);padding:6px;border-radius:50px;box-shadow:inset 0 2px 4px #0000000d;margin-bottom:var(--spacing-xl)}.segment-item{padding:10px 24px;border-radius:50px;font-size:.9rem;font-weight:600;color:var(--text-secondary);background:transparent;transition:all .3s cubic-bezier(.4,0,.2,1);white-space:nowrap}.segment-item:hover{color:var(--text-primary)}.segment-item.active{background:var(--primary-color);color:var(--text-inverse);box-shadow:0 4px 12px #3b82f64d}@media (max-width: 640px){.segmented-control{display:flex;flex-wrap:wrap;border-radius:20px}.segment-item{flex:1 1 auto;padding:8px 16px;font-size:.8rem}}.exam-card-v2{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:var(--spacing-lg);display:flex;align-items:center;gap:var(--spacing-lg);transition:all .3s ease}.exam-card-v2:hover{transform:translateY(-4px);border-color:var(--primary-color);box-shadow:var(--shadow-lg)}.exam-icon-box{width:50px;height:50px;background:#3b82f61a;border:1px solid rgba(59,130,246,.2);color:var(--primary-color);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0}.exam-info{flex:1}.exam-type-badge{font-size:.75rem;font-weight:700;text-transform:uppercase;color:var(--primary-color);margin-bottom:2px}.exam-title-v2{font-size:1.15rem;font-weight:700;margin-bottom:var(--spacing-sm)}.exam-card-v2 .exam-meta-v2{display:flex;gap:var(--spacing-sm);flex-wrap:wrap}.meta-pill{padding:4px 12px;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:50px;font-size:.75rem;color:var(--text-secondary);transition:all .2s ease}.meta-pill:hover{background:var(--bg-glass);color:var(--text-primary)}.exam-action-v2 .btn{padding:8px 20px}.exams-list{display:grid;gap:20px}.empty-state{text-align:center;padding:var(--spacing-2xl);background:var(--bg-secondary);border-radius:20px;border:1px dashed var(--border-color)}@media (max-width: 768px){.exam-card-v2{flex-direction:column;text-align:center}}