:root{--bg-primary: #0f1117;--bg-secondary: #181b25;--bg-card: #1e2233;--bg-card-hover: #252a3a;--bg-input: #151822;--text-primary: #e8eaed;--text-secondary: #9aa0b0;--text-muted: #5f6580;--accent: #6366f1;--accent-hover: #818cf8;--accent-subtle: rgba(99, 102, 241, .12);--success: #22c55e;--success-subtle: rgba(34, 197, 94, .12);--warning: #f59e0b;--warning-subtle: rgba(245, 158, 11, .12);--danger: #ef4444;--danger-subtle: rgba(239, 68, 68, .12);--border: #2a2f42;--border-light: #353b52;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 24px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--font-body: "Outfit", -apple-system, sans-serif;--font-mono: "JetBrains Mono", monospace;--transition: .2s cubic-bezier(.4, 0, .2, 1);--front-bg: url(https://btaqtpeswwrlzpeuepgt.supabase.co/storage/v1/object/public/lesson-images/front-2.jpg)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-body);background-color:var(--bg-primary);background-image:var(--front-bg);background-size:cover;background-position:center;background-attachment:fixed;background-repeat:no-repeat;color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0c14d1;z-index:0;pointer-events:none}#root{position:relative;z-index:1}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}img{max-width:100%;display:block}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;color:var(--text-primary)}h1{font-size:clamp(1.75rem,4vw,2.5rem)}h2{font-size:clamp(1.25rem,3vw,1.75rem)}h3{font-size:clamp(1.1rem,2.5vw,1.35rem)}.page-container{max-width:1280px;margin:0 auto;padding:24px 20px}@media (max-width: 768px){.page-container{padding:16px 12px}}.navbar{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:#181b25d9;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.navbar-brand{font-size:1.25rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;gap:8px}.navbar-brand span{background:linear-gradient(135deg,var(--accent),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-user{display:flex;align-items:center;gap:12px}.navbar-avatar{width:36px;height:36px;border-radius:50%;border:2px solid var(--border-light);object-fit:cover}.navbar-name{font-weight:500;font-size:.9rem;color:var(--text-secondary)}@media (max-width: 640px){.navbar{padding:12px 16px}.navbar-name{display:none}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;font-family:var(--font-body);font-size:.9rem;font-weight:500;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 16px #6366f14d}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--border-light)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#16a34a}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 12px}.btn-ghost:hover:not(:disabled){background:var(--accent-subtle);color:var(--accent)}.btn-sm{padding:6px 14px;font-size:.8rem}.btn-lg{padding:14px 28px;font-size:1rem}.btn-icon{padding:8px;border-radius:var(--radius-sm)}.card{background:#1e2233d9;border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;transition:all var(--transition);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.card:hover{border-color:var(--border-light);box-shadow:var(--shadow-sm)}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.form-group{margin-bottom:20px}.form-label{display:block;font-size:.85rem;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.form-input,.form-textarea,.form-select{width:100%;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font-body);font-size:.95rem;transition:all var(--transition)}.form-input:focus,.form-textarea:focus,.form-select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-subtle)}.form-input::placeholder,.form-textarea::placeholder{color:var(--text-muted)}.form-textarea{min-height:120px;resize:vertical}.progress-bar{width:100%;height:8px;background:var(--bg-input);border-radius:4px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),#a855f7);border-radius:4px;transition:width .5s ease}.progress-bar-fill.complete{background:linear-gradient(90deg,var(--success),#34d399)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .2s ease}.modal-content{background:#181b25f7;border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;max-width:600px;width:100%;max-height:90vh;overflow-y:auto;animation:slideUp .3s ease;position:relative}.modal-content.wide{max-width:900px}.modal-close{position:absolute;top:16px;right:16px;background:none;border:none;color:var(--text-muted);font-size:1.5rem;cursor:pointer;transition:color var(--transition);padding:4px}.modal-close:hover{color:var(--text-primary)}.modal-title{font-size:1.5rem;margin-bottom:24px;padding-right:32px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 640px){.modal-content{padding:20px;margin:10px}}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.badge-success{background:var(--success-subtle);color:var(--success)}.badge-warning{background:var(--warning-subtle);color:var(--warning)}.badge-danger{background:var(--danger-subtle);color:var(--danger)}.badge-neutral{background:#64748b1f;color:#94a3b8}.table-wrapper{overflow-x:auto;border-radius:var(--radius-md);border:1px solid var(--border)}.table{width:100%;border-collapse:collapse}.table th{background:var(--bg-card);padding:14px 16px;text-align:left;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);border-bottom:1px solid var(--border)}.table td{padding:14px 16px;border-bottom:1px solid var(--border);font-size:.9rem;vertical-align:middle}.table tr:last-child td{border-bottom:none}.table tr:hover td{background:#ffffff05}.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:32px}.metric-card{background:#1e2233d9;border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;text-align:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.metric-card .metric-value{font-size:2rem;font-weight:700;background:linear-gradient(135deg,var(--accent),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.metric-card .metric-label{font-size:.8rem;color:var(--text-muted);margin-top:4px;text-transform:uppercase;letter-spacing:.5px}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}@media (max-width: 640px){.courses-grid{grid-template-columns:1fr}}.course-card{background:#1e2233d9;border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;transition:all var(--transition);display:flex;flex-direction:column;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.course-card:hover{border-color:var(--accent);box-shadow:0 4px 20px #6366f126;transform:translateY(-2px)}.course-card-title{font-size:1.25rem;margin-bottom:8px}.course-card-info{color:var(--text-secondary);font-size:.85rem;margin-bottom:16px;flex-grow:1}.lesson-item{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:#1e2233d9;border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:8px;transition:all var(--transition);gap:12px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.lesson-item:hover{border-color:var(--border-light)}.lesson-item.completed{border-left:3px solid var(--success);background:linear-gradient(90deg,#22c55e14,#1e2233d9)}.lesson-item.started{border-left:3px solid var(--warning);background:linear-gradient(90deg,#f59e0b14,#1e2233d9)}.lesson-item.locked{opacity:.5}.lesson-title{font-weight:500;font-size:.95rem;flex:1}@media (max-width: 640px){.lesson-item{flex-direction:column;align-items:flex-start}}.lesson-body{line-height:1.8;color:var(--text-secondary)}.lesson-body p{margin-bottom:16px}.lesson-body h4{color:var(--text-primary);font-size:1.1rem;margin:24px 0 12px}.lesson-body img{border-radius:var(--radius-sm);margin:12px 0;cursor:zoom-in;border:1px solid var(--border)}.lesson-body video{width:100%;border-radius:var(--radius-sm);margin:12px 0}.task-block{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;margin:16px 0}.task-question{font-weight:600;margin-bottom:12px}.task-option{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);margin-bottom:4px}.task-option:hover{background:#ffffff08}.task-option input[type=checkbox],.task-option input[type=radio]{accent-color:var(--accent);margin-top:3px;flex-shrink:0}.task-option label{cursor:pointer;font-size:.9rem;color:var(--text-secondary)}.spinner{display:flex;align-items:center;justify-content:center;padding:40px}.spinner:after{content:"";width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state svg{margin-bottom:16px;opacity:.5}.fullscreen-image-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:2000;cursor:zoom-out;padding:20px}.fullscreen-image-overlay img{max-width:95vw;max-height:95vh;object-fit:contain;border-radius:var(--radius-sm)}.editor-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.sortable-item{display:flex;align-items:center;gap:8px;padding:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px}.sortable-item .drag-handle{cursor:grab;color:var(--text-muted)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;background-image:url(https://btaqtpeswwrlzpeuepgt.supabase.co/storage/v1/object/public/lesson-images/front.jpg);background-size:cover;background-position:center;background-attachment:fixed}.login-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:#0a0c14bf,radial-gradient(ellipse at 20% 50%,rgba(99,102,241,.12) 0%,transparent 50%),radial-gradient(ellipse at 80% 50%,rgba(168,85,247,.12) 0%,transparent 50%),radial-gradient(ellipse at 50% 0%,rgba(99,102,241,.08) 0%,transparent 40%);z-index:0}.login-bg:before{content:"";position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.15) 0%,transparent 70%);top:-100px;left:-100px;animation:floatOrb 8s ease-in-out infinite}.login-bg:after{content:"";position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(168,85,247,.12) 0%,transparent 70%);bottom:-80px;right:-80px;animation:floatOrb 10s ease-in-out infinite reverse}@keyframes floatOrb{0%,to{transform:translate(0) scale(1)}33%{transform:translate(30px,-20px) scale(1.05)}66%{transform:translate(-20px,30px) scale(.95)}}.login-card{position:relative;z-index:1;background:#181b25eb;border:1px solid rgba(99,102,241,.2);border-radius:var(--radius-xl);padding:48px 40px;width:100%;max-width:420px;box-shadow:0 8px 40px #00000080,0 0 60px #6366f114;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);animation:loginCardIn .5s cubic-bezier(.34,1.56,.64,1)}@keyframes loginCardIn{0%{opacity:0;transform:translateY(30px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.login-title{text-align:center;font-size:2rem;font-weight:700;margin-bottom:8px}.login-title span{background:linear-gradient(135deg,var(--accent),#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-subtitle{text-align:center;color:var(--text-muted);margin-bottom:36px;font-size:.9rem}@media (max-width: 480px){.login-card{padding:32px 24px;margin:16px}.login-page{background-attachment:scroll}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--border-light)}.admin-tabs{display:flex;gap:4px;margin-bottom:24px;border-bottom:1px solid var(--border);overflow-x:auto}.admin-tab{padding:12px 20px;font-size:.9rem;font-weight:500;color:var(--text-muted);background:none;border:none;border-bottom:2px solid transparent;cursor:pointer;transition:all var(--transition);white-space:nowrap}.admin-tab:hover{color:var(--text-secondary)}.admin-tab.active{color:var(--accent);border-bottom-color:var(--accent)}#confetti-canvas{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;pointer-events:none}.completion-modal-inner{animation:completionPop .5s cubic-bezier(.34,1.56,.64,1)}@keyframes completionPop{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.completion-award{animation:awardBounce 1s ease infinite alternate}@keyframes awardBounce{0%{transform:translateY(0) rotate(-5deg)}to{transform:translateY(-10px) rotate(5deg)}}.completion-modal-border{position:relative}.completion-modal-border:before{content:"";position:absolute;top:-2px;right:-2px;bottom:-2px;left:-2px;border-radius:calc(var(--radius-lg) + 2px);background:linear-gradient(45deg,#6366f1,#a855f7,#22c55e,#f59e0b,#6366f1);background-size:300% 300%;animation:gradientBorder 3s ease infinite;z-index:-1}@keyframes gradientBorder{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.ql-editor{min-height:200px;color:var(--text-primary)}.ql-toolbar{background:var(--bg-card);border-color:var(--border)!important}.ql-container{border-color:var(--border)!important;background:var(--bg-input)}.ql-toolbar .ql-stroke{stroke:var(--text-secondary)!important}.ql-toolbar .ql-fill{fill:var(--text-secondary)!important}.ql-toolbar button:hover .ql-stroke{stroke:var(--accent)!important}.ql-toolbar button:hover .ql-fill{fill:var(--accent)!important}.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.mt-2{margin-top:8px}.mt-4{margin-top:16px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.text-center{text-align:center}.text-sm{font-size:.85rem}.text-muted{color:var(--text-muted)}.w-full{width:100%}