@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap";:root{--brand-primary: #3B82F6;--brand-primary-light: #60A5FA;--brand-primary-dark: #2563EB;--brand-secondary: #8B5CF6;--brand-accent: #06B6D4;--brand-accent-light: #22D3EE;--brand-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);--brand-gradient-hover: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);--brand-gradient-soft: linear-gradient(135deg, rgba(59, 130, 246, .1) 0%, rgba(139, 92, 246, .1) 100%);--color-success: #10B981;--color-success-light: rgba(16, 185, 129, .15);--color-success-dark: #059669;--color-warning: #F59E0B;--color-warning-light: rgba(245, 158, 11, .15);--color-warning-dark: #D97706;--color-error: #EF4444;--color-error-light: rgba(239, 68, 68, .15);--color-error-dark: #DC2626;--color-info: #06B6D4;--color-info-light: rgba(6, 182, 212, .15);--color-info-dark: #0891B2;--font-primary: "Inter", -apple-system, 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15px rgba(0, 0, 0, .1);--shadow-glow: 0 0 30px rgba(0, 120, 212, .25);--shadow-glow-accent: 0 0 30px rgba(0, 188, 242, .25);--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease;--transition-spring: .5s cubic-bezier(.34, 1.56, .64, 1);--z-base: 1;--z-dropdown: 100;--z-sticky: 200;--z-modal-backdrop: 300;--z-modal: 400;--z-toast: 500;--z-tooltip: 600;--container-max: 1280px;--container-sm: 768px;--sidebar-width: 280px;--navbar-height: 64px}:root,[data-theme=dark]{--bg-primary: #0A0B0F;--bg-secondary: #14151A;--bg-tertiary: #1A1D23;--bg-elevated: #1F2229;--bg-card: rgba(31, 34, 41, .8);--bg-card-hover: rgba(41, 45, 54, .9);--bg-glass: rgba(10, 11, 15, .7);--bg-input: rgba(41, 45, 54, .6);--bg-surface: #1E2128;--bg-overlay: rgba(0, 0, 0, .8);--border-primary: rgba(59, 130, 246, .3);--border-subtle: rgba(255, 255, 255, .06);--border-hover: rgba(59, 130, 246, .5);--border-focus: rgba(59, 130, 246, .6);--border-accent: rgba(139, 92, 246, .4);--text-primary: #F8FAFC;--text-secondary: #CBD5E1;--text-muted: #94A3B8;--text-inverse: #0A0B0F;--text-accent: #A5B4FC;--text-success: #86EFAC;--text-warning: #FDE047;--text-error: #FCA5A5;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3), 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 3px 6px rgba(0, 0, 0, .4), 0 2px 4px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .4), 0 3px 6px rgba(0, 0, 0, .3);--shadow-xl: 0 15px 35px rgba(0, 0, 0, .5), 0 5px 15px rgba(0, 0, 0, .4);--shadow-glow: 0 0 30px rgba(59, 130, 246, .3);--shadow-glow-accent: 0 0 30px rgba(139, 92, 246, .3);--scrollbar-track: #1A1D23;--scrollbar-thumb: #475569;--scrollbar-thumb-hover: #64748B;--accent-primary: #3B82F6;--accent-secondary: #8B5CF6;--accent-success: #10B981;--accent-warning: #F59E0B;--accent-error: #EF4444;--surface-gradient: linear-gradient(135deg, #1A1D23 0%, #14151A 100%);--card-gradient: linear-gradient(135deg, rgba(31, 34, 41, .9) 0%, rgba(26, 29, 35, .9) 100%);--accent-gradient: linear-gradient(135deg, #3B82F6 0%, 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ease}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-primary);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--text-primary);background-color:var(--bg-primary);min-height:100vh;overflow-x:hidden;transition:background-color var(--transition-base),color var(--transition-base)}[data-theme=dark]{background:var(--bg-primary);background-image:radial-gradient(circle at 20% 50%,rgba(59,130,246,.05) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(139,92,246,.05) 0%,transparent 50%),radial-gradient(circle at 40% 20%,rgba(6,182,212,.05) 0%,transparent 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#F8F9FC;--bg-secondary: #FFFFFF;--bg-tertiary: #F0F1F5;--bg-elevated: #FFFFFF;--bg-card: rgba(255, 255, 255, .9);--bg-card-hover: rgba(255, 255, 255, 1);--bg-glass: rgba(248, 249, 252, .85);--bg-input: rgba(240, 241, 245, .8);--border-primary: rgba(0, 120, 212, .25);--border-subtle: rgba(0, 0, 0, .1);--border-hover: rgba(0, 120, 212, .5);--text-primary: #1A1A2E;--text-secondary: #5A5A7A;--text-muted: #9A9AB0;--text-inverse: #F0F0F8;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 30px rgba(0, 0, 0, .12);--shadow-xl: 0 16px 50px rgba(0, 0, 0, .15);--scrollbar-track: #F0F1F5;--scrollbar-thumb: #C8C8D8;--scrollbar-thumb-hover: #A8A8C0}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);font-size:var(--text-sm);font-weight:var(--font-semibold);border-radius:var(--radius-md);transition:all var(--transition-base);white-space:nowrap;position:relative;overflow:hidden}.btn-primary{background:var(--brand-gradient);color:#fff;box-shadow:var(--shadow-md);border:1px solid transparent}.btn-primary:hover{background:var(--brand-gradient-hover);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-md)}[data-theme=dark] .btn-primary{background:linear-gradient(135deg,#3b82f6,#8b5cf6);box-shadow:0 4px 12px #3b82f64d}[data-theme=dark] .btn-primary:hover{background:linear-gradient(135deg,#2563eb,#7c3aed);box-shadow:0 6px 20px #3b82f666}.btn-secondary:hover{background:var(--bg-elevated);border-color:var(--border-primary)}[data-theme=dark] .btn-secondary{background:#292d36cc;border-color:#ffffff0f;color:var(--text-secondary)}[data-theme=dark] 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.btn-spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-6);transition:all var(--transition-base);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.card:hover{background:var(--bg-card-hover);border-color:var(--border-primary);box-shadow:var(--shadow-lg);transform:translateY(-3px)}[data-theme=dark] .card{background:linear-gradient(135deg,#1f2229e6,#1a1d23e6);border-color:#ffffff0f;box-shadow:0 4px 20px #0000004d}[data-theme=dark] .card:hover{background:linear-gradient(135deg,#292d36f2,#1f2229f2);border-color:#3b82f64d;box-shadow:0 8px 30px #3b82f633}.card-flat{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-6);transition:all var(--transition-base)}.card-flat:hover{border-color:var(--border-primary);box-shadow:var(--shadow-md)}.card-glass{background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-6);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);transition:all var(--transition-base)}.card-glass:hover{border-color:var(--border-primary);box-shadow:var(--shadow-md)}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}.error-offline-icon{animation:float 2s ease-in-out infinite}.module-list{margin-bottom:var(--space-4)}.module-item{padding:var(--space-2) var(--space-4);font-weight:600;background:var(--bg-secondary);border-radius:var(--radius-md);margin-bottom:var(--space-2);position:relative}.module-item.completed{background:var(--bg-tertiary);color:var(--text-secondary)}.module-item.completed:after{content:"";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;right:var(--space-4);top:50%;transform:translateY(-50%);color:var(--color-success);font-size:.9rem}.badge{display:inline-flex;align-items:center;gap:var(--space-1);padding:var(--space-1) var(--space-3);font-size:var(--text-xs);font-weight:var(--font-semibold);border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.5px}.badge-primary{background:#0078d426;color:var(--brand-primary-light)}.badge-success{background:var(--color-success-light);color:var(--color-success)}.badge-warning{background:var(--color-warning-light);color:#e17055}.badge-error{background:var(--color-error-light);color:var(--color-error)}.notif-bell{position:relative;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid var(--border-subtle);background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.notif-bell.has-unread{box-shadow:0 0 #6c5ce780;animation:notifPulse 1.6s infinite}.notif-badge{position:absolute;top:-4px;right:-4px;min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:var(--color-error);color:#fff;font-size:10px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}@keyframes notifPulse{0%{box-shadow:0 0 #6c5ce780}70%{box-shadow:0 0 0 10px #6c5ce700}to{box-shadow:0 0 #6c5ce700}}.progress-track{width:100%;height:8px;background:var(--bg-tertiary);border-radius:var(--radius-full);overflow:hidden}.progress-fill{height:100%;background:var(--brand-gradient);border-radius:var(--radius-full);transition:width .6s cubic-bezier(.34,1.56,.64,1);position:relative}.progress-fill:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);background-size:200% 100%;animation:shimmer 2s infinite}.progress-label{font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--text-secondary);margin-bottom:var(--space-2)}.input-group{display:flex;flex-direction:column;gap:var(--space-2)}.input-group label{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-secondary)}.input{background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4);color:var(--text-primary);transition:all var(--transition-fast)}.input:focus{border-color:var(--brand-primary);box-shadow:0 0 0 3px #0078d426}[data-theme=dark] .input{background:#292d3699;border-color:#ffffff0f;color:var(--text-primary)}[data-theme=dark] .input:focus{background:#292d36cc;border-color:#3b82f680;box-shadow:0 0 0 3px #3b82f633}.input::placeholder{color:var(--text-muted)}.textarea{min-height:120px;resize:vertical}.tabs{display:flex;gap:var(--space-1);background:var(--bg-tertiary);border-radius:var(--radius-md);padding:var(--space-1)}.tab{padding:var(--space-2) var(--space-4);font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-muted);border-radius:var(--radius-sm);transition:all var(--transition-fast);cursor:pointer}.tab:hover{color:var(--text-primary)}.tab.active{background:var(--bg-elevated);color:var(--text-primary);box-shadow:var(--shadow-sm)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:var(--z-modal-backdrop);opacity:0;pointer-events:none;transition:opacity var(--transition-base)}.modal-overlay.active{opacity:1;pointer-events:auto}.modal{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:var(--space-8);max-width:500px;width:90%;max-height:85vh;overflow-y:auto;transform:scale(.9) translateY(20px);transition:transform var(--transition-spring);z-index:var(--z-modal)}.modal-overlay.active .modal{transform:scale(1) translateY(0)}[data-theme=dark] .modal{background:linear-gradient(135deg,#14171cf2,#1a1d23f2);border-color:#ffffff14;box-shadow:0 20px 50px #00000080}[data-theme=dark] .modal-overlay{background:#000c}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-6)}.modal-title{font-size:var(--text-xl);font-weight:var(--font-bold)}.modal-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);color:var(--text-muted);transition:all var(--transition-fast)}.modal-close:hover{background:var(--bg-tertiary);color:var(--text-primary)}.toast-container{position:fixed;top:calc(var(--navbar-height) + var(--space-4));right:var(--space-4);z-index:var(--z-toast);display:flex;flex-direction:column;gap:var(--space-3)}.toast{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-4) var(--space-5);display:flex;align-items:center;gap:var(--space-3);box-shadow:var(--shadow-lg);animation:slideInRight .4s ease forwards;min-width:300px;max-width:420px}.toast-success{border-left:3px solid var(--color-success)}.toast-error{border-left:3px solid var(--color-error)}.toast-warning{border-left:3px solid var(--color-warning)}.toast-info{border-left:3px solid var(--color-info)}.toast-icon{font-size:var(--text-xl);flex-shrink:0}.toast-message{font-size:var(--text-sm);color:var(--text-primary);flex:1}.tooltip-wrapper{position:relative}.tooltip{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%) scale(.8);background:var(--bg-elevated);color:var(--text-primary);font-size:var(--text-xs);padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);white-space:nowrap;box-shadow:var(--shadow-md);opacity:0;pointer-events:none;transition:all var(--transition-fast);z-index:var(--z-tooltip)}.tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:5px solid transparent;border-top-color:var(--bg-elevated)}.tooltip-wrapper:hover .tooltip{opacity:1;transform:translate(-50%) scale(1)}.accordion-item{border-bottom:1px solid var(--border-subtle)}.accordion-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-4) 0;cursor:pointer;color:var(--text-primary);font-weight:var(--font-medium);transition:color var(--transition-fast)}.accordion-header:hover{color:var(--brand-primary-light)}.accordion-icon{transition:transform var(--transition-base)}.accordion-item.active .accordion-icon{transform:rotate(180deg)}.accordion-body{max-height:0;overflow:hidden;transition:max-height var(--transition-slow)}.accordion-item.active .accordion-body{max-height:500px}.accordion-content{padding-bottom:var(--space-4);color:var(--text-secondary);font-size:var(--text-sm)}.markdown-split{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4);align-items:stretch}.markdown-editor .textarea{min-height:220px}.markdown-preview{background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-4);min-height:220px;overflow:auto;color:var(--text-secondary)}.markdown-preview h1,.markdown-preview h2,.markdown-preview h3,.markdown-preview h4{color:var(--text-primary);margin:0 0 var(--space-3)}.markdown-preview p{margin-bottom:var(--space-3);line-height:1.6}.markdown-preview pre{background:var(--bg-tertiary);padding:var(--space-3);border-radius:var(--radius-md);overflow:auto}.markdown-preview code{font-family:var(--font-mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-size:.9em}@media (max-width: 900px){.markdown-split{grid-template-columns:1fr}}.skeleton{background:var(--bg-tertiary);border-radius:var(--radius-md);position:relative;overflow:hidden}.skeleton:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.05),transparent);background-size:200% 100%;animation:shimmer 1.5s infinite}.divider{height:1px;background:var(--border-subtle);margin:var(--space-6) 0}.avatar{width:40px;height:40px;border-radius:var(--radius-full);background:var(--brand-gradient);display:flex;align-items:center;justify-content:center;font-size:var(--text-sm);font-weight:var(--font-bold);color:#fff;flex-shrink:0}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--brand-gradient);color:#fff;opacity:0;pointer-events:none;transition:all .3s ease;z-index:200;cursor:pointer}.back-to-top.visible{opacity:1;pointer-events:auto}mark.search-highlight{background:#0078d440;color:var(--brand-primary-light);border-radius:2px;padding:0 2px;font-weight:600}.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2);list-style:none;padding:0;margin:0;font-size:var(--text-sm)}.breadcrumb-item{display:flex;align-items:center;gap:var(--space-2);color:var(--text-muted)}.breadcrumb-item a{color:var(--text-muted);text-decoration:none;transition:color .2s}.breadcrumb-item a:hover{color:var(--brand-primary-light)}.breadcrumb-item.active{color:var(--text-primary);font-weight:600}.breadcrumb-separator{color:var(--text-muted);opacity:.5;font-size:.8rem}.shortcuts-tooltip.visible{opacity:1;pointer-events:auto;transform:translateY(0)}.shortcuts-tooltip-title{font-weight:var(--font-bold);font-size:var(--text-sm);margin-bottom:var(--space-3);color:var(--text-primary)}.shortcuts-tooltip-row{display:flex;justify-content:space-between;align-items:center;padding:var(--space-1) 0;font-size:var(--text-sm);color:var(--text-secondary)}.shortcuts-tooltip-row kbd{background:var(--bg-tertiary);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:2px 6px;font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-primary)}.avatar-sm{width:32px;height:32px;font-size:var(--text-xs)}.avatar-lg{width:56px;height:56px;font-size:var(--text-xl)}.tag{display:inline-flex;align-items:center;gap:var(--space-1);padding:var(--space-1) var(--space-2);font-size:var(--text-xs);font-weight:var(--font-medium);border-radius:var(--radius-sm);background:var(--bg-tertiary);color:var(--text-secondary);border:1px solid var(--border-subtle)}.empty-state{text-align:center;padding:var(--space-16) var(--space-6)}.empty-state-icon{font-size:3rem;margin-bottom:var(--space-4)}.empty-state-title{font-size:var(--text-xl);font-weight:var(--font-semibold);margin-bottom:var(--space-2)}.empty-state-text{color:var(--text-muted);max-width:400px;margin:0 auto}.container-sidebar{display:grid;grid-template-columns:280px 1fr;gap:var(--space-6);min-height:100vh}.sidebar-admin{background:var(--bg-secondary);border-right:1px solid var(--border-subtle);padding:var(--space-6);position:sticky;top:var(--navbar-height);height:calc(100vh - var(--navbar-height));overflow-y:auto}.card-hover-lift{transition:all .3s cubic-bezier(.34,1.56,.64,1)}.card-hover-lift:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl)}.card-border-gradient{position:relative;border:2px solid transparent;background-clip:padding-box}.card-border-gradient:before{content:"";position:absolute;top:-2px;right:-2px;bottom:-2px;left:-2px;border-radius:var(--radius-lg);background:var(--brand-gradient);z-index:-1}.section-header-professional{margin-bottom:var(--space-12);position:relative}.section-header-professional:after{content:"";position:absolute;bottom:-var(--space-4);left:0;width:60px;height:4px;background:var(--brand-gradient);border-radius:var(--radius-full)}.divider{border:none;height:1px;background:var(--border-subtle);margin:var(--space-6) 0}.divider-gradient{height:2px;background:var(--brand-gradient);border-radius:var(--radius-full);margin:var(--space-8) 0}.list-item-professional{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);transition:all var(--transition-base)}.list-item-professional:hover{background:var(--bg-tertiary);transform:translate(2px)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-4)}.stat-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-5);text-align:center;transition:all var(--transition-base)}.stat-card:hover{border-color:var(--border-primary);transform:translateY(-4px);box-shadow:var(--shadow-md)}.stat-card-value{font-size:2rem;font-weight:800;background:var(--brand-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-2)}.stat-card-label{font-size:var(--text-sm);color:var(--text-muted)}@media (max-width: 480px){.card,.card-glass,.card-flat{padding:var(--space-4)}.modal{padding:var(--space-6)}.btn{padding:var(--space-2) var(--space-4);font-size:var(--text-xs)}.btn-lg{padding:var(--space-3) var(--space-6);font-size:var(--text-sm)}}.desktop-only{display:flex!important}.mobile-only{display:none!important}@media (max-width: 1150px){.desktop-only{display:none!important}.mobile-only{display:flex!important}}.navbar{position:fixed;top:0;left:0;right:0;height:var(--navbar-height);background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle);z-index:var(--z-sticky);transition:background var(--transition-base),height var(--transition-base)}[data-theme=dark] .navbar{background:#0a0b0fcc;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.06);box-shadow:0 4px 20px #0000004d}.navbar .container{display:flex;align-items:center;justify-content:space-between;height:100%;padding:0 var(--space-6);max-width:var(--container-xl);margin:0 auto}.nav-brand{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-lg);font-weight:var(--font-bold);color:var(--text-primary);text-decoration:none;flex-shrink:0;z-index:10}.nav-brand img{height:32px;width:auto}.nav-brand-text{display:flex;align-items:baseline;gap:var(--space-1);white-space:nowrap}.nav-brand-pro{color:var(--brand-primary-light)}.nav-links{display:flex;align-items:center;gap:var(--space-1);justify-content:flex-end;margin:0 var(--space-4);overflow:hidden}.nav-link{padding:var(--space-2) var(--space-4);font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-secondary);border-radius:20px;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap}.nav-link:hover{color:var(--text-primary);background:var(--bg-tertiary)}.nav-link.active{color:var(--brand-primary);background:var(--brand-gradient-soft);box-shadow:0 2px 8px #3b82f633}[data-theme=dark] .nav-link:hover{background:#3b82f61a;color:var(--brand-primary)}[data-theme=dark] .nav-link.active{background:linear-gradient(135deg,#3b82f633,#8b5cf633);color:var(--text-primary)}.nav-actions{display:flex;align-items:center;gap:var(--space-4);flex-shrink:0}.theme-toggle{background:none;border:none;cursor:pointer;font-size:1.15rem;color:var(--text-primary);display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);padding:var(--space-1);border-radius:50%}.theme-toggle:hover{color:var(--brand-primary-light);transform:scale(1.1);background:var(--bg-tertiary)}.fa-sun{color:#fff!important}.nav-menu-btn{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:var(--bg-tertiary);border:1px solid var(--border-subtle);border-radius:30px;color:var(--text-primary);font-size:var(--text-sm);font-weight:var(--font-bold);cursor:pointer;transition:all var(--transition-fast)}.nav-menu-btn:hover{background:var(--bg-hover);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.nav-menu-btn i{font-size:var(--text-base)}.nav-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:2000;opacity:0;visibility:hidden;transition:all .4s ease}.nav-sidebar-overlay.visible{opacity:1;visibility:visible}.nav-sidebar{position:fixed;top:0;right:-340px;width:340px;height:100vh;background:var(--bg-glass);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);border-left:1px solid var(--border-subtle);z-index:2001;display:flex;flex-direction:column;transition:transform .4s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-2xl)}.nav-sidebar.open{transform:translate(-340px)}.sidebar-header{padding:var(--space-6);display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-subtle)}.sidebar-logo{display:flex;align-items:center;gap:var(--space-3);font-weight:var(--font-bold);color:var(--text-primary)}.sidebar-logo img{height:28px}.sidebar-close{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg-tertiary);color:var(--text-secondary);border:none;cursor:pointer;transition:all .2s}.sidebar-close:hover{background:var(--color-error-light);color:var(--color-error)}.sidebar-content{flex:1;overflow-y:auto;padding:var(--space-6);display:flex;flex-direction:column;gap:var(--space-8)}.sidebar-user-card{background:linear-gradient(135deg,var(--brand-primary) 0%,#2980b9 100%);border-radius:var(--radius-xl);padding:var(--space-5);color:#fff;box-shadow:0 10px 20px #0078d433}.user-info{display:flex;align-items:center;gap:var(--space-4);margin-bottom:var(--space-5)}.user-avatar-lg{width:56px;height:56px;background:#fff3;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:var(--text-xl);font-weight:700;border:2px solid rgba(255,255,255,.3)}.user-details{display:flex;flex-direction:column}.user-name{font-weight:var(--font-bold);font-size:var(--text-lg)}.user-role{font-size:var(--text-xs);opacity:.8}.user-stats{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3)}.stat{background:#ffffff1a;padding:var(--space-2) var(--space-3);border-radius:var(--radius-lg);display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);font-weight:var(--font-medium)}.sidebar-groups{display:flex;flex-direction:column;gap:var(--space-8)}.group-title{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:var(--space-4);font-weight:var(--font-bold)}.group-links{display:flex;flex-direction:column;gap:var(--space-1)}.sidebar-link{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-4);color:var(--text-secondary);text-decoration:none;font-weight:var(--font-medium);border-radius:var(--radius-lg);transition:all .2s}.sidebar-link i{width:20px;font-size:var(--text-base);text-align:center}.sidebar-link:hover{background:var(--bg-tertiary);color:var(--text-primary);transform:translate(4px)}.sidebar-link.active{background:#0078d426;color:var(--brand-primary-light)}.sidebar-link.admin-link{color:var(--color-warning)}.sidebar-footer{padding:var(--space-6);border-top:1px solid var(--border-subtle);display:flex;flex-direction:column;gap:var(--space-3)}.theme-toggle-btn{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-4);background:var(--bg-tertiary);border:none;border-radius:var(--radius-lg);color:var(--text-primary);font-weight:var(--font-medium);cursor:pointer;transition:all .2s}.theme-toggle-btn:hover{background:var(--bg-hover)}.sidebar-logout,.sidebar-login-btn{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);font-weight:var(--font-bold);cursor:pointer;transition:all .2s;text-decoration:none}.sidebar-logout{background:#e170551a;color:var(--color-error);border:none}.sidebar-logout:hover{background:var(--color-error);color:#fff}.sidebar-login-btn{background:var(--brand-primary);color:#fff}@media (max-width: 1150px){.nav-links{display:none!important}.navbar .container{padding:0 var(--space-4)}.nav-brand{margin-right:auto}}@media (max-width: 480px){.nav-brand-text{display:none}.nav-sidebar{width:100%;right:-100%}.nav-sidebar.open{transform:translate(-100%)}.menu-btn-text{display:none}}.hero{position:relative;min-height:calc(100vh - var(--navbar-height));display:flex;align-items:center;overflow:hidden;padding:var(--space-16) 0;background:linear-gradient(180deg,var(--bg-primary) 0%,var(--bg-secondary) 100%)}.hero:before{content:"";position:absolute;top:-50%;left:-20%;width:700px;height:700px;background:radial-gradient(circle,rgba(0,120,212,.15) 0%,transparent 70%);border-radius:50%;pointer-events:none;animation:float 8s ease-in-out 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768px){.lesson-layout{grid-template-columns:1fr}.course-sidebar{position:fixed;left:0;top:var(--navbar-height);z-index:var(--z-sticky);transform:translate(-100%);box-shadow:var(--shadow-xl)}.course-sidebar.open{transform:translate(0)}.sidebar-toggle{display:flex;align-items:center;justify-content:center}.lesson-main{padding:var(--space-4)}.lesson-nav{flex-direction:column;gap:var(--space-3)}.lesson-nav-btn{width:100%;justify-content:center}}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-6);position:relative;overflow:hidden}.auth-page:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at 20% 50%,rgba(0,120,212,.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(0,188,242,.06) 0%,transparent 50%),radial-gradient(ellipse at 50% 80%,rgba(0,120,212,.04) 0%,transparent 50%);animation:authBgPulse 12s ease-in-out infinite alternate;pointer-events:none}@keyframes 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infinite}.auth-divider{display:flex;align-items:center;gap:var(--space-3);color:var(--text-muted);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border-subtle)}.auth-google-btn{width:100%;padding:var(--space-3) var(--space-4);font-size:var(--text-sm);font-weight:600;border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:var(--bg-tertiary);color:var(--text-primary);cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:var(--space-3)}.auth-google-btn:hover{border-color:var(--text-muted);background:var(--bg-primary)}.auth-google-btn svg{width:18px;height:18px}.auth-footer{text-align:center;margin-top:var(--space-6);font-size:var(--text-sm);color:var(--text-muted)}.auth-footer a{color:var(--brand-primary-light);font-weight:600;text-decoration:none;transition:color .2s ease}.auth-footer 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6px;border-radius:4px;font-family:monospace;color:var(--brand-primary-light)}.about-hero{text-align:center;padding:var(--space-16) 0 var(--space-10)}.about-avatar{width:150px;height:150px;border-radius:50%;border:4px solid var(--bg-secondary);box-shadow:0 0 0 4px var(--brand-primary);margin:0 auto var(--space-6);background:linear-gradient(135deg,var(--brand-primary),var(--brand-secondary));display:flex;align-items:center;justify-content:center;font-size:4rem;color:#fff}.tech-stack-tags{display:flex;flex-wrap:wrap;gap:var(--space-2);justify-content:center;max-width:600px;margin:var(--space-6) auto}.tech-tag{padding:var(--space-1) var(--space-3);background:var(--bg-tertiary);border:1px solid 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slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}.wizard-dots{display:flex;gap:var(--space-2);margin-bottom:var(--space-8)}.wizard-dot{width:32px;height:4px;border-radius:2px;background:var(--border-subtle);transition:all .3s}.wizard-dot.active{background:var(--brand-primary)}@media (max-width: 768px){.wizard-left{display:none}.docs-layout{grid-template-columns:1fr}.docs-sidebar{display:none}}.css-bar-chart{display:flex;align-items:flex-end;justify-content:space-around;height:100%;width:100%;padding-top:var(--space-6)}.css-chart-col{display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end;flex:1;gap:var(--space-2)}.css-bar{width:32px;background:linear-gradient(to top,var(--brand-secondary),var(--brand-primary));border-radius:var(--radius-sm) var(--radius-sm) 0 0;position:relative;transition:all .3s ease;cursor:pointer;box-shadow:0 4px 12px #0078d433}.css-bar:hover{filter:brightness(1.2);transform:scaleY(1.02);transform-origin:bottom}.css-bar.active{box-shadow:0 0 20px #0078d466}.css-bar-shimmer{position:absolute;top:0;left:0;height:100%;width:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);background-size:200% 100%;animation:shimmer 2s infinite}.css-bar-tooltip{position:absolute;top:-30px;left:50%;transform:translate(-50%);background:var(--bg-tooltip, #333);color:#fff;padding:4px 8px;border-radius:4px;font-size:.75rem;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s}.css-bar:hover .css-bar-tooltip{opacity:1}.css-label{font-size:var(--text-xs);color:var(--text-muted)}.text-gradient{background:linear-gradient(135deg,var(--brand-primary-light),var(--brand-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.quiz-summary-card{background:var(--bg-secondary);border:1px solid 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