:root{--primary: #4F46E5;--primary-light: #6366F1;--primary-dark: #4338CA;--purple: #7C3AED;--purple-light: #8B5CF6;--sidebar-bg: #1E1B4B;--sidebar-hover: #312E81;--sidebar-active: #3730A3;--bg: #F5F3FF;--bg-white: #FFFFFF;--text: #1F2937;--text-light: #6B7280;--text-muted: #9CA3AF;--border: #E5E7EB;--border-light: #F3F4F6;--success: #10B981;--success-light: #D1FAE5;--warning: #F59E0B;--warning-light: #FEF3C7;--danger: #EF4444;--danger-light: #FEE2E2;--info: #3B82F6;--info-light: #DBEAFE;--gold: #F59E0B;--gold-light: #FDE68A;--coin-color: #F59E0B;--xp-bar: linear-gradient(90deg, #F59E0B, #F97316);--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);--radius: 8px;--radius-lg: 12px;--radius-full: 9999px;--transition: all .2s ease}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}a{color:var(--primary);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-dark)}img{max-width:100%;height:auto}.app-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--sidebar-bg);color:#e0e7ff;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:50;transition:width .3s ease;overflow-y:auto}.sidebar.collapsed{width:72px}.sidebar-logo{padding:20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--purple));border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#fff;flex-shrink:0}.sidebar-logo-text{font-size:18px;font-weight:700;color:#fff;white-space:nowrap}.sidebar.collapsed .sidebar-logo-text,.sidebar.collapsed .nav-label,.sidebar.collapsed .nav-section-title{display:none}.nav-section{padding:16px 0 8px}.nav-section-title{padding:0 20px;font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#818cf8;margin-bottom:4px;font-weight:600}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 20px;color:#c7d2fe;font-size:14px;cursor:pointer;transition:var(--transition);border:none;background:none;width:100%;text-align:left;text-decoration:none}.nav-item:hover{background:var(--sidebar-hover);color:#fff}.nav-item.active{background:var(--sidebar-active);color:#fff;border-right:3px solid #818CF8}.nav-item .nav-icon{width:20px;height:20px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:16px}.sidebar-footer{margin-top:auto;padding:16px 20px;border-top:1px solid rgba(255,255,255,.1)}.main-content{flex:1;margin-left:260px;transition:margin-left .3s ease}.sidebar.collapsed~.main-content,.main-content.sidebar-collapsed{margin-left:72px}.topbar{height:64px;background:var(--bg-white);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:40;box-shadow:var(--shadow-sm)}.topbar-left{display:flex;align-items:center;gap:16px}.topbar-right{display:flex;align-items:center;gap:20px}.topbar-toggle{background:none;border:none;cursor:pointer;color:var(--text-light);font-size:20px;padding:4px}.topbar-title{font-size:18px;font-weight:600}.topbar-xp{display:flex;align-items:center;gap:8px;padding:4px 12px;background:var(--warning-light);border-radius:var(--radius-full);font-size:13px;font-weight:600;color:#92400e}.topbar-coins{display:flex;align-items:center;gap:6px;padding:4px 12px;background:#fef3c7;border-radius:var(--radius-full);font-size:13px;font-weight:600;color:#92400e}.topbar-user{display:flex;align-items:center;gap:10px;cursor:pointer;padding:4px 8px;border-radius:var(--radius);transition:var(--transition)}.topbar-user:hover{background:var(--border-light)}.topbar-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--purple));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:14px}.topbar-user-info{line-height:1.2}.topbar-user-name{font-size:14px;font-weight:500}.topbar-user-role{font-size:11px;color:var(--text-muted)}.notification-bell{position:relative;background:none;border:none;cursor:pointer;font-size:20px;color:var(--text-light);padding:4px}.notification-badge{position:absolute;top:-2px;right:-2px;background:var(--danger);color:#fff;font-size:10px;font-weight:700;min-width:18px;height:18px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 4px}.page{padding:24px;max-width:1400px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page-title{font-size:24px;font-weight:700;color:var(--text)}.page-subtitle{font-size:14px;color:var(--text-light);margin-top:4px}.card{background:var(--bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px;transition:var(--transition)}.card:hover{box-shadow:var(--shadow-md)}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.card-title{font-size:16px;font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;border:1px solid transparent;transition:var(--transition);text-decoration:none;line-height:1;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--purple));color:#fff;border:none}.btn-primary:hover:not(:disabled){opacity:.9;transform:translateY(-1px);box-shadow:0 4px 12px #4f46e566}.btn-secondary{background:var(--bg-white);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--border-light)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#059669}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-warning{background:var(--warning);color:#fff}.btn-warning:hover:not(:disabled){background:#d97706}.btn-ghost{background:transparent;color:var(--text-light);border:none;padding:8px 12px}.btn-ghost:hover:not(:disabled){background:var(--border-light);color:var(--text)}.btn-sm{padding:6px 12px;font-size:12px}.btn-lg{padding:14px 28px;font-size:16px}.btn-block{width:100%}.form-group{margin-bottom:20px}.form-label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text)}.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;color:var(--text);background:var(--bg-white);transition:var(--transition);font-family:inherit}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.form-textarea{resize:vertical;min-height:100px}.form-error{font-size:12px;color:var(--danger);margin-top:4px}.form-hint{font-size:12px;color:var(--text-muted);margin-top:4px}.grid{display:grid;gap:24px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media (max-width: 1024px){.grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0!important}.page{padding:16px}}.flex{display:flex}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.items-start{align-items:flex-start}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-4{gap:4px}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-24{gap:24px}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.text-center{text-align:center}.text-right{text-align:right}.text-sm{font-size:12px}.text-base{font-size:14px}.text-lg{font-size:18px}.text-xl{font-size:24px}.text-muted{color:var(--text-muted)}.text-light{color:var(--text-light)}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.text-warning{color:var(--warning)}.text-primary{color:var(--primary)}.font-bold{font-weight:700}.font-medium{font-weight:500}.badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:var(--radius-full);font-size:12px;font-weight:500;line-height:1.5}.badge-primary{background:#eef2ff;color:var(--primary)}.badge-success{background:var(--success-light);color:#065f46}.badge-warning{background:var(--warning-light);color:#92400e}.badge-danger{background:var(--danger-light);color:#991b1b}.badge-info{background:var(--info-light);color:#1e40af}.badge-gray{background:#f3f4f6;color:#4b5563}.table-wrapper{overflow-x:auto}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border);font-size:14px}.table th{font-weight:600;color:var(--text-light);font-size:12px;text-transform:uppercase;letter-spacing:.5px;background:var(--border-light)}.table tr:hover td{background:#fafafe}.progress{width:100%;height:8px;background:#e5e7eb;border-radius:var(--radius-full);overflow:hidden}.progress-bar{height:100%;border-radius:var(--radius-full);transition:width .6s ease}.progress-bar-primary{background:linear-gradient(90deg,var(--primary),var(--purple))}.progress-bar-success{background:var(--success)}.progress-bar-xp{background:var(--xp-bar)}.progress-bar-gold{background:linear-gradient(90deg,#f59e0b,#fbbf24);box-shadow:0 0 8px #f59e0b66}.xp-progress-wrapper{padding:16px;background:linear-gradient(135deg,#fffbeb,#fef3c7);border-radius:var(--radius-lg);border:1px solid #FDE68A}.xp-progress-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.xp-level-name{font-weight:600;font-size:14px;color:#92400e}.xp-values{font-size:12px;color:#a16207}.stat-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow);display:flex;align-items:flex-start;gap:16px}.stat-card-icon{width:48px;height:48px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}.stat-card-icon.primary{background:#eef2ff;color:var(--primary)}.stat-card-icon.success{background:var(--success-light);color:var(--success)}.stat-card-icon.warning{background:var(--warning-light);color:var(--warning)}.stat-card-icon.danger{background:var(--danger-light);color:var(--danger)}.stat-card-icon.info{background:var(--info-light);color:var(--info)}.stat-card-icon.purple{background:#f3e8ff;color:var(--purple)}.stat-card-value{font-size:28px;font-weight:700;line-height:1;margin-bottom:4px}.stat-card-label{font-size:13px;color:var(--text-light)}.stat-card-trend{font-size:12px;font-weight:500;margin-top:4px}.stat-card-trend.up{color:var(--success)}.stat-card-trend.down{color:var(--danger)}.achievement-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow);text-align:center;position:relative;overflow:hidden;transition:var(--transition)}.achievement-card.earned{border:2px solid var(--gold)}.achievement-card.earned:after{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(245,158,11,.08) 0%,transparent 70%);pointer-events:none}.achievement-card.locked{opacity:.6;filter:grayscale(.5)}.achievement-icon{width:64px;height:64px;margin:0 auto 12px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:28px;background:linear-gradient(135deg,#fde68a,#f59e0b);color:#78350f}.achievement-card.locked .achievement-icon{background:#e5e7eb;color:#9ca3af}.achievement-name{font-weight:600;font-size:14px;margin-bottom:4px}.achievement-desc{font-size:12px;color:var(--text-light);margin-bottom:8px}.achievement-reward{font-size:11px;color:var(--gold);font-weight:600}.kanban-board{display:flex;gap:16px;overflow-x:auto;padding-bottom:16px;min-height:400px}.kanban-column{min-width:280px;max-width:320px;flex:1;background:var(--border-light);border-radius:var(--radius-lg);padding:12px}.kanban-column-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;padding:8px}.kanban-column-title{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.kanban-column-count{font-size:12px;font-weight:600;background:var(--bg-white);padding:2px 8px;border-radius:var(--radius-full);color:var(--text-light)}.kanban-card{background:var(--bg-white);border-radius:var(--radius);padding:14px;margin-bottom:8px;box-shadow:var(--shadow-sm);cursor:pointer;transition:var(--transition);border-left:3px solid transparent}.kanban-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.kanban-card.priority-low{border-left-color:var(--success)}.kanban-card.priority-medium{border-left-color:var(--warning)}.kanban-card.priority-high{border-left-color:#f97316}.kanban-card.priority-urgent{border-left-color:var(--danger)}.kanban-card-title{font-size:14px;font-weight:500;margin-bottom:8px}.kanban-card-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-light)}.kanban-card-avatar{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--purple));display:flex;align-items:center;justify-content:center;color:#fff;font-size:10px;font-weight:600}.kanban-card-due{font-size:11px;padding:2px 6px;border-radius:4px}.kanban-card-due.overdue{background:var(--danger-light);color:#991b1b}.kanban-card-due.soon{background:var(--warning-light);color:#92400e}.course-card{background:var(--bg-white);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition);cursor:pointer}.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.course-card-cover{height:160px;background:linear-gradient(135deg,var(--primary),var(--purple));display:flex;align-items:center;justify-content:center;color:#fff;font-size:48px;position:relative}.course-card-cover img{width:100%;height:100%;object-fit:cover}.course-card-badges{position:absolute;top:12px;left:12px;display:flex;gap:6px}.course-card-body{padding:16px}.course-card-title{font-size:16px;font-weight:600;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-card-info{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-light);margin-bottom:12px}.course-card-footer{padding:12px 16px;border-top:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between}.level-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--radius-full);font-size:12px;font-weight:600}.level-badge.level-1{background:#dbeafe;color:#1e40af}.level-badge.level-2{background:#d1fae5;color:#065f46}.level-badge.level-3{background:#fef3c7;color:#92400e}.level-badge.level-4{background:#fde68a;color:#78350f}.level-badge.level-5{background:linear-gradient(135deg,#fde68a,#f59e0b);color:#78350f}.coin-display{display:inline-flex;align-items:center;gap:4px;font-weight:600;color:var(--coin-color)}.coin-icon{width:18px;height:18px;border-radius:50%;background:linear-gradient(135deg,#fbbf24,#f59e0b);display:flex;align-items:center;justify-content:center;font-size:10px;color:#78350f;font-weight:800;box-shadow:0 1px 3px #f59e0b4d}.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:24px;gap:4px}.tab{padding:10px 20px;font-size:14px;font-weight:500;color:var(--text-light);cursor:pointer;border:none;background:none;position:relative;transition:var(--transition)}.tab:hover{color:var(--text)}.tab.active{color:var(--primary)}.tab.active:after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--primary);border-radius:2px 2px 0 0}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .2s ease}.modal{background:var(--bg-white);border-radius:var(--radius-lg);padding:24px;min-width:400px;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideUp .3s ease}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.modal-title{font-size:18px;font-weight:600}.modal-close{background:none;border:none;font-size:24px;cursor:pointer;color:var(--text-light);padding:4px;line-height:1}.modal-footer{display:flex;justify-content:flex-end;gap:12px;margin-top:24px;padding-top:16px;border-top:1px solid var(--border)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-pulse{animation:pulse 2s infinite}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e1b4b,#312e81,#4338ca);padding:24px}.auth-card{background:var(--bg-white);border-radius:var(--radius-lg);padding:40px;width:100%;max-width:440px;box-shadow:var(--shadow-lg)}.auth-logo{text-align:center;margin-bottom:32px}.auth-logo-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--primary),var(--purple));border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:24px;font-weight:800;color:#fff}.auth-logo-text{font-size:24px;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.auth-logo-sub{font-size:14px;color:var(--text-light);margin-top:4px}.file-upload-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);padding:32px;text-align:center;cursor:pointer;transition:var(--transition);background:var(--border-light)}.file-upload-zone:hover,.file-upload-zone.dragging{border-color:var(--primary);background:#eef2ff}.file-upload-icon{font-size:36px;color:var(--text-muted);margin-bottom:8px}.file-upload-text{font-size:14px;color:var(--text-light)}.file-upload-hint{font-size:12px;color:var(--text-muted);margin-top:4px}.empty-state{text-align:center;padding:48px 24px;color:var(--text-light)}.empty-state-icon{font-size:48px;margin-bottom:16px;opacity:.5}.empty-state-title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px}.empty-state-text{font-size:14px;max-width:360px;margin:0 auto}.loading-spinner{display:inline-block;width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay{display:flex;align-items:center;justify-content:center;padding:48px}.comment-thread{display:flex;flex-direction:column;gap:16px}.comment{display:flex;gap:12px}.comment-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--purple));display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:600;flex-shrink:0}.comment-body{flex:1;background:var(--border-light);border-radius:var(--radius);padding:12px}.comment-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.comment-author{font-weight:500;font-size:13px}.comment-time{font-size:11px;color:var(--text-muted)}.comment-text{font-size:14px;line-height:1.5}.comment.internal .comment-body{background:#fef3c7;border:1px solid #FDE68A}.filters-bar{display:flex;align-items:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.filter-search{flex:1;min-width:200px;position:relative}.filter-search input{padding-left:36px}.filter-search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-muted)}.quiz-question{background:var(--bg-white);border-radius:var(--radius-lg);padding:24px;margin-bottom:16px;box-shadow:var(--shadow)}.quiz-question-number{font-size:12px;font-weight:600;color:var(--primary);margin-bottom:8px}.quiz-question-text{font-size:16px;font-weight:500;margin-bottom:16px}.quiz-option{display:flex;align-items:center;gap:12px;padding:12px 16px;border:2px solid var(--border);border-radius:var(--radius);margin-bottom:8px;cursor:pointer;transition:var(--transition)}.quiz-option:hover{border-color:var(--primary-light);background:#eef2ff}.quiz-option.selected{border-color:var(--primary);background:#eef2ff}.quiz-option.correct{border-color:var(--success);background:var(--success-light)}.quiz-option.incorrect{border-color:var(--danger);background:var(--danger-light)}.quiz-option-radio{width:20px;height:20px;border-radius:50%;border:2px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0}.quiz-option.selected .quiz-option-radio{border-color:var(--primary);background:var(--primary)}.quiz-option.selected .quiz-option-radio:after{content:"";width:8px;height:8px;border-radius:50%;background:#fff}.quiz-timer{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600;color:var(--text)}.quiz-timer.warning{color:var(--danger);animation:pulse 1s infinite}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}@media print{.sidebar,.topbar{display:none}.main-content{margin-left:0!important}}
