@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";:root{--primary:#6366f1;--primary-dark:#4f46e5;--primary-light:#818cf8;--secondary:#06b6d4;--accent:#f59e0b;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--info:#3b82f6;--bg-base:#0a0e1a;--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-card:#1a2236;--bg-card-hover:#1e2a42;--bg-glass:#ffffff0a;--bg-glass-hover:#ffffff14;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-muted:#64748b;--text-accent:#818cf8;--border:#ffffff14;--border-focus:#6366f199;--border-card:#ffffff0f;--shadow-sm:0 1px 3px #0006;--shadow-md:0 4px 20px #0006;--shadow-lg:0 10px 40px #00000080;--glow-primary:0 0 30px #6366f140;--glow-success:0 0 20px #10b98140;--glow-danger:0 0 20px #ef444440;--space-xs:.25rem;--space-sm:.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--radius-sm:.375rem;--radius-md:.75rem;--radius-lg:1rem;--radius-xl:1.5rem;--radius-full:9999px;--transition-fast:all .15s ease;--transition-base:all .25s ease;--transition-slow:all .4s ease;--font-base:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:1.875rem;--font-size-4xl:2.25rem;--sidebar-width:260px;--navbar-height:64px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-base);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.6;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}ul{list-style:none}button{cursor:pointer;font-family:var(--font-base)}input,textarea,select{font-family:var(--font-base)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--primary-dark);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--primary)}.app-layout{min-height:100vh;display:flex}.main-content{margin-left:var(--sidebar-width);padding:var(--space-xl);background:var(--bg-primary);flex:1;min-height:100vh}.page-header{margin-bottom:var(--space-xl)}.page-title{font-size:var(--font-size-3xl);color:var(--text-primary);letter-spacing:-.02em;font-weight:800}.page-subtitle{color:var(--text-muted);margin-top:var(--space-xs);font-size:var(--font-size-sm)}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border);z-index:100;height:100vh;transition:var(--transition-base);flex-direction:column;display:flex;position:fixed;top:0;left:0;overflow:hidden}.sidebar-logo{align-items:center;gap:var(--space-sm);padding:var(--space-lg) var(--space-lg);border-bottom:1px solid var(--border);flex-shrink:0;display:flex}.sidebar-logo-icon{background:linear-gradient(135deg, var(--primary), var(--secondary));border-radius:var(--radius-md);width:40px;height:40px;box-shadow:var(--glow-primary);justify-content:center;align-items:center;font-size:1.2rem;display:flex}.sidebar-logo-text{font-size:var(--font-size-lg);background:linear-gradient(135deg, var(--primary-light), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-weight:800}.sidebar-nav{padding:var(--space-md) 0;flex:1;overflow-y:auto}.sidebar-section-label{font-size:var(--font-size-xs);color:var(--text-muted);text-transform:uppercase;letter-spacing:.1em;padding:var(--space-sm) var(--space-lg);margin-top:var(--space-sm);font-weight:600}.sidebar-link{align-items:center;gap:var(--space-sm);padding:.625rem var(--space-lg);color:var(--text-secondary);font-size:var(--font-size-sm);transition:var(--transition-fast);border-radius:0;margin:1px 0;font-weight:500;display:flex;position:relative}.sidebar-link:hover{color:var(--text-primary);background:var(--bg-glass-hover)}.sidebar-link.active{color:var(--primary-light);background:#6366f11f;font-weight:600}.sidebar-link.active:before{content:"";background:linear-gradient(to bottom, var(--primary), var(--secondary));border-radius:0 var(--radius-sm) var(--radius-sm) 0;width:3px;position:absolute;top:0;bottom:0;left:0}.sidebar-link .link-icon{flex-shrink:0;width:18px;height:18px}.sidebar-link .link-badge{background:var(--danger);color:#fff;border-radius:var(--radius-full);margin-left:auto;padding:1px 6px;font-size:.65rem;font-weight:700;line-height:1.4}.sidebar-user{padding:var(--space-md) var(--space-lg);border-top:1px solid var(--border);align-items:center;gap:var(--space-sm);flex-shrink:0;display:flex}.sidebar-user-avatar{border-radius:var(--radius-full);background:linear-gradient(135deg, var(--primary), var(--secondary));width:36px;height:36px;font-weight:700;font-size:var(--font-size-sm);color:#fff;flex-shrink:0;justify-content:center;align-items:center;display:flex;overflow:hidden}.sidebar-user-avatar img{object-fit:cover;width:100%;height:100%}.sidebar-user-info{flex:1;min-width:0}.sidebar-user-name{font-size:var(--font-size-sm);color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.sidebar-user-role{font-size:var(--font-size-xs);color:var(--text-muted);text-transform:capitalize}.sidebar-logout-btn{color:var(--text-muted);padding:var(--space-xs);border-radius:var(--radius-sm);transition:var(--transition-fast);background:0 0;border:none;display:flex}.sidebar-logout-btn:hover{color:var(--danger);background:#ef44441a}.topbar{z-index:50;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:0 var(--space-xl);height:var(--navbar-height);justify-content:space-between;align-items:center;gap:var(--space-lg);margin-bottom:var(--space-xl);background:#0f172ad9;display:flex;position:sticky;top:0}.topbar-search{align-items:center;gap:var(--space-sm);background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-full);padding:var(--space-sm) var(--space-md);min-width:260px;transition:var(--transition-fast);display:flex}.topbar-search:focus-within{border-color:var(--border-focus);background:var(--bg-glass-hover)}.topbar-search input{color:var(--text-primary);font-size:var(--font-size-sm);background:0 0;border:none;outline:none;width:100%}.topbar-search input::placeholder{color:var(--text-muted)}.topbar-actions{align-items:center;gap:var(--space-sm);display:flex}.topbar-icon-btn{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-secondary);padding:var(--space-sm);transition:var(--transition-fast);justify-content:center;align-items:center;width:40px;height:40px;display:flex;position:relative}.topbar-icon-btn:hover{color:var(--text-primary);background:var(--bg-glass-hover);border-color:var(--border-focus)}.notif-dot{background:var(--danger);border:2px solid var(--bg-primary);border-radius:50%;width:8px;height:8px;position:absolute;top:6px;right:6px}.card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);padding:var(--space-lg);transition:var(--transition-base)}.card:hover{border-color:var(--border);box-shadow:var(--shadow-md);transform:translateY(-2px)}.card-glass{background:var(--bg-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-lg)}.stat-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);padding:var(--space-lg);gap:var(--space-sm);transition:var(--transition-base);flex-direction:column;display:flex;position:relative;overflow:hidden}.stat-card:before{content:"";background:var(--stat-color,var(--primary));border-radius:var(--radius-lg) var(--radius-lg) 0 0;height:3px;position:absolute;top:0;left:0;right:0}.stat-card:hover{box-shadow:var(--shadow-lg);border-color:var(--border);transform:translateY(-3px)}.stat-icon{border-radius:var(--radius-md);background:color-mix(in srgb, var(--stat-color,var(--primary)) 15%, transparent);width:44px;height:44px;color:var(--stat-color,var(--primary));justify-content:center;align-items:center;display:flex}.stat-value{font-size:var(--font-size-3xl);color:var(--text-primary);letter-spacing:-.02em;font-weight:800;line-height:1}.stat-label{font-size:var(--font-size-sm);color:var(--text-muted);font-weight:500}.stat-change{font-size:var(--font-size-xs);color:var(--success);align-items:center;gap:2px;font-weight:600;display:flex}.stats-grid{gap:var(--space-lg);margin-bottom:var(--space-xl);grid-template-columns:repeat(auto-fit,minmax(200px,1fr));display:grid}.courses-grid{gap:var(--space-lg);grid-template-columns:repeat(auto-fill,minmax(280px,1fr));display:grid}.classrooms-grid{gap:var(--space-lg);grid-template-columns:repeat(auto-fill,minmax(320px,1fr));display:grid}.course-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);transition:var(--transition-base);cursor:pointer;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-lg), var(--glow-primary);border-color:#6366f14d;transform:translateY(-4px)}.course-thumbnail{object-fit:cover;background:linear-gradient(135deg, var(--bg-secondary), var(--bg-card));width:100%;height:160px}.course-thumbnail-placeholder{width:100%;height:160px;color:var(--primary-light);background:linear-gradient(135deg,#6366f133,#06b6d433);justify-content:center;align-items:center;display:flex}.course-body{padding:var(--space-md)}.course-category{font-size:var(--font-size-xs);color:var(--secondary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:var(--space-xs);font-weight:600}.course-title{font-size:var(--font-size-base);color:var(--text-primary);margin-bottom:var(--space-xs);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-weight:700;display:-webkit-box;overflow:hidden}.course-meta{margin-top:var(--space-md);justify-content:space-between;align-items:center;display:flex}.level-badge{border-radius:var(--radius-full);font-size:var(--font-size-xs);padding:2px 10px;font-weight:600}.level-Beginner{color:var(--success);background:#10b98126}.level-Intermediate{color:var(--warning);background:#f59e0b26}.level-Advanced{color:var(--danger);background:#ef444426}.classroom-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);padding:var(--space-lg);transition:var(--transition-base);cursor:pointer;position:relative;overflow:hidden}.classroom-card:after{content:"";opacity:0;transition:var(--transition-base);background:linear-gradient(135deg,#6366f10d,#0000);position:absolute;inset:0}.classroom-card:hover:after{opacity:1}.classroom-card:hover{box-shadow:var(--shadow-lg);border-color:#6366f14d;transform:translateY(-3px)}.classroom-card.live{border-color:#ef444466;box-shadow:0 0 20px #ef444426}.live-badge{color:var(--danger);font-size:var(--font-size-xs);border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.05em;background:#ef444426;align-items:center;gap:5px;padding:3px 10px;font-weight:700;display:inline-flex}.live-badge:before{content:"";background:var(--danger);border-radius:50%;width:6px;height:6px;animation:1.5s infinite pulse-dot}@keyframes pulse-dot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.3)}}.classroom-subject{font-size:var(--font-size-sm);color:var(--secondary);margin-bottom:var(--space-xs);font-weight:600}.classroom-name{font-size:var(--font-size-xl);color:var(--text-primary);margin-bottom:var(--space-sm);font-weight:700}.classroom-educator{align-items:center;gap:var(--space-sm);margin-bottom:var(--space-md);display:flex}.avatar-sm{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:.7rem;font-weight:700;display:flex;overflow:hidden}.avatar-sm img{object-fit:cover;width:100%;height:100%}.classroom-footer{padding-top:var(--space-md);border-top:1px solid var(--border);justify-content:space-between;align-items:center;display:flex}.student-count{align-items:center;gap:var(--space-xs);font-size:var(--font-size-xs);color:var(--text-muted);display:flex}.progress-bar-wrap{border-radius:var(--radius-full);height:6px;margin-top:var(--space-xs);background:#ffffff14;overflow:hidden}.progress-bar-fill{border-radius:var(--radius-full);background:linear-gradient(90deg, var(--primary), var(--secondary));height:100%;transition:width .8s}.btn{justify-content:center;align-items:center;gap:var(--space-sm);padding:.625rem var(--space-lg);border-radius:var(--radius-md);font-size:var(--font-size-sm);cursor:pointer;transition:var(--transition-fast);white-space:nowrap;border:none;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;box-shadow:0 4px 14px #6366f159}.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 6px 20px #6366f173}.btn-secondary{background:var(--bg-glass);color:var(--text-secondary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-glass-hover);color:var(--text-primary);border-color:var(--border-focus)}.btn-danger{background:linear-gradient(135deg, var(--danger), #dc2626);color:#fff;box-shadow:0 4px 14px #ef44444d}.btn-danger:hover{filter:brightness(1.1);transform:translateY(-1px)}.btn-success{background:linear-gradient(135deg, var(--success), #059669);color:#fff;box-shadow:0 4px 14px #10b9814d}.btn-success:hover{filter:brightness(1.1);transform:translateY(-1px)}.btn-live{color:#fff;background:linear-gradient(135deg,#ef4444,#dc2626);animation:2s ease-in-out infinite live-glow;box-shadow:0 4px 16px #ef444466}@keyframes live-glow{0%,to{box-shadow:0 4px 16px #ef444466}50%{box-shadow:0 4px 24px #ef4444a6}}.btn-sm{font-size:var(--font-size-xs);padding:.375rem .875rem}.btn-lg{padding:.875rem var(--space-xl);font-size:var(--font-size-base)}.btn-icon{border-radius:var(--radius-md);width:36px;height:36px;padding:0}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.form-group{gap:var(--space-xs);margin-bottom:var(--space-md);flex-direction:column;display:flex}.form-label{font-size:var(--font-size-sm);color:var(--text-secondary);font-weight:600}.form-control{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-md);padding:.75rem var(--space-md);color:var(--text-primary);font-size:var(--font-size-sm);transition:var(--transition-fast);outline:none;width:100%}.form-control:focus{border-color:var(--border-focus);background:var(--bg-glass-hover);box-shadow:0 0 0 3px #6366f126}.form-control::placeholder{color:var(--text-muted)}.form-control-lg{padding:1rem var(--space-lg);font-size:var(--font-size-base)}textarea.form-control{resize:vertical;min-height:100px}select.form-control{cursor:pointer}select.form-control option{background:var(--bg-secondary);color:var(--text-primary)}.form-error{font-size:var(--font-size-xs);color:var(--danger)}.table-wrap{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);overflow:hidden}.table{border-collapse:collapse;width:100%}.table thead th{background:var(--bg-secondary);color:var(--text-muted);font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.08em;padding:var(--space-sm) var(--space-lg);text-align:left;border-bottom:1px solid var(--border);font-weight:600}.table tbody td{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border);font-size:var(--font-size-sm);color:var(--text-secondary)}.table tbody tr:last-child td{border-bottom:none}.table tbody tr{transition:var(--transition-fast)}.table tbody tr:hover{background:var(--bg-glass-hover)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;padding:var(--space-lg);background:#000000b3;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-xl);width:100%;max-width:520px;max-height:90vh;box-shadow:var(--shadow-lg);animation:.25s slideUp;overflow-y:auto}.modal-header{margin-bottom:var(--space-xl);justify-content:space-between;align-items:center;display:flex}.modal-title{font-size:var(--font-size-xl);font-weight:700}.modal-close{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-muted);width:32px;height:32px;transition:var(--transition-fast);justify-content:center;align-items:center;display:flex}.modal-close:hover{color:var(--danger);background:#ef44441a}.modal-footer{gap:var(--space-sm);margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--border);justify-content:flex-end;display:flex}.badge{border-radius:var(--radius-full);font-size:var(--font-size-xs);align-items:center;gap:4px;padding:2px 10px;font-weight:600;display:inline-flex}.badge-primary{color:var(--primary-light);background:#6366f126}.badge-success{color:var(--success);background:#10b98126}.badge-danger{color:var(--danger);background:#ef444426}.badge-warning{color:var(--warning);background:#f59e0b26}.badge-muted{color:var(--text-muted);background:#64748b26}.auth-page{background:var(--bg-base);min-height:100vh;display:flex;position:relative;overflow:hidden}.auth-bg{pointer-events:none;background:radial-gradient(80% 80% at 20% -20%,#6366f140 0%,#0000 60%),radial-gradient(60% 60% at 80% 100%,#06b6d433 0%,#0000 60%);position:absolute;inset:0}.auth-grid-bg{pointer-events:none;background-image:linear-gradient(#ffffff05 1px,#0000 1px),linear-gradient(90deg,#ffffff05 1px,#0000 1px);background-size:40px 40px;position:absolute;inset:0}.auth-left{padding:var(--space-2xl);z-index:1;flex-direction:column;flex:1;justify-content:center;display:none;position:relative}.auth-left-content{max-width:480px}.auth-left-badge{align-items:center;gap:var(--space-sm);color:var(--primary-light);padding:var(--space-xs) var(--space-md);border-radius:var(--radius-full);font-size:var(--font-size-sm);margin-bottom:var(--space-xl);background:#6366f126;border:1px solid #6366f14d;font-weight:600;display:inline-flex}.auth-left-title{letter-spacing:-.03em;margin-bottom:var(--space-lg);font-size:clamp(2rem,4vw,3.5rem);font-weight:900;line-height:1.1}.auth-left-title .gradient-text{background:linear-gradient(135deg, var(--primary-light), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.auth-left-desc{color:var(--text-muted);font-size:var(--font-size-lg);margin-bottom:var(--space-2xl);line-height:1.7}.auth-features{gap:var(--space-md);flex-direction:column;display:flex}.auth-feature{align-items:center;gap:var(--space-md);background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-md);display:flex}.auth-feature-icon{border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.auth-right{width:100%;max-width:480px;padding:var(--space-xl);z-index:1;flex-direction:column;justify-content:center;margin:0 auto;display:flex;position:relative}.auth-card{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-2xl);box-shadow:var(--shadow-lg)}.auth-logo{align-items:center;gap:var(--space-sm);margin-bottom:var(--space-xl);display:flex}.auth-logo-icon{background:linear-gradient(135deg, var(--primary), var(--secondary));border-radius:var(--radius-md);width:44px;height:44px;box-shadow:var(--glow-primary);justify-content:center;align-items:center;font-size:1.3rem;display:flex}.auth-logo-name{font-size:var(--font-size-xl);background:linear-gradient(135deg, var(--primary-light), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-weight:800}.auth-title{font-size:var(--font-size-2xl);margin-bottom:var(--space-xs);font-weight:800}.auth-subtitle{color:var(--text-muted);font-size:var(--font-size-sm);margin-bottom:var(--space-xl)}.auth-switch{text-align:center;margin-top:var(--space-lg);color:var(--text-muted);font-size:var(--font-size-sm)}.auth-switch a{color:var(--primary-light);font-weight:600}.auth-switch a:hover{text-decoration:underline}.role-selector{gap:var(--space-sm);margin-bottom:var(--space-md);grid-template-columns:repeat(3,1fr);display:grid}.role-option{display:none}.role-label{align-items:center;gap:var(--space-xs);padding:var(--space-md) var(--space-sm);border:2px solid var(--border);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-fast);text-align:center;background:var(--bg-glass);flex-direction:column;display:flex}.role-label:hover{border-color:var(--primary-light);background:#6366f114}.role-option:checked+.role-label{border-color:var(--primary);color:var(--primary-light);background:#6366f126}.role-icon{font-size:1.5rem}.role-name{font-size:var(--font-size-xs);font-weight:600}.live-room{background:var(--bg-base);flex-direction:column;height:100vh;display:flex}.live-topbar{background:var(--bg-secondary);border-bottom:1px solid var(--border);height:56px;padding:0 var(--space-lg);flex-shrink:0;justify-content:space-between;align-items:center;display:flex}.live-video-wrap{background:#000;flex:1;position:relative;overflow:hidden}.live-video-wrap iframe{border:none;width:100%;height:100%}.live-chat-panel{background:var(--bg-secondary);border-left:1px solid var(--border);flex-direction:column;width:300px;display:flex}.live-main-area{flex:1;display:flex;overflow:hidden}.live-chat-messages{padding:var(--space-md);flex:1;overflow-y:auto}.chat-message{margin-bottom:var(--space-md)}.chat-message-name{font-size:var(--font-size-xs);color:var(--primary-light);margin-bottom:2px;font-weight:600}.chat-message-text{font-size:var(--font-size-sm);color:var(--text-secondary)}.live-chat-input{padding:var(--space-md);border-top:1px solid var(--border);gap:var(--space-sm);display:flex}.notif-panel{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-xl);width:360px;box-shadow:var(--shadow-lg);z-index:300;animation:.2s slideDown;position:absolute;top:calc(100% + 8px);right:0;overflow:hidden}.notif-header{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border);font-weight:700;font-size:var(--font-size-sm);justify-content:space-between;align-items:center;display:flex}.notif-item{gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border);transition:var(--transition-fast);cursor:pointer;display:flex}.notif-item:hover{background:var(--bg-glass-hover)}.notif-item.unread{background:#6366f10d}.notif-item-icon{border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:1rem;display:flex}.notif-item-title{font-size:var(--font-size-sm);margin-bottom:2px;font-weight:600}.notif-item-msg{font-size:var(--font-size-xs);color:var(--text-muted)}.notif-item-time{font-size:var(--font-size-xs);color:var(--text-muted);white-space:nowrap}.notif-footer{padding:var(--space-sm) var(--space-lg);text-align:center}.notif-footer a{font-size:var(--font-size-sm);color:var(--primary-light);font-weight:600}.notif-empty{padding:var(--space-2xl);text-align:center;color:var(--text-muted);font-size:var(--font-size-sm)}.empty-state{padding:var(--space-2xl);text-align:center;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;display:flex}.empty-state-icon{margin-bottom:var(--space-md);opacity:.5;font-size:3rem}.empty-state-title{font-size:var(--font-size-lg);color:var(--text-secondary);margin-bottom:var(--space-sm);font-weight:700}.empty-state-text{font-size:var(--font-size-sm);max-width:300px}.spinner{border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:36px;height:36px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading-page{justify-content:center;align-items:center;gap:var(--space-md);background:var(--bg-primary);min-height:100vh;color:var(--text-muted);flex-direction:column;display:flex}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-in{animation:.4s forwards fadeSlideIn}.animate-in-delay-1{opacity:0;animation-delay:.1s;animation-fill-mode:forwards}.animate-in-delay-2{opacity:0;animation-delay:.2s;animation-fill-mode:forwards}.animate-in-delay-3{opacity:0;animation-delay:.3s;animation-fill-mode:forwards}.skeleton{background:linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-card-hover) 50%, var(--bg-secondary) 75%);border-radius:var(--radius-md);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@media (width>=768px){.auth-left{display:flex}.auth-right{flex-shrink:0;width:440px;margin:0}}@media (width<=768px){.main-content{padding:var(--space-md);margin-left:0}.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.stats-grid{grid-template-columns:repeat(2,1fr)}.courses-grid{grid-template-columns:1fr}.live-chat-panel{display:none}}@media (width<=480px){.stats-grid,.role-selector{grid-template-columns:1fr}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-end{justify-content:flex-end}.gap-sm{gap:var(--space-sm)}.gap-md{gap:var(--space-md)}.gap-lg{gap:var(--space-lg)}.mb-md{margin-bottom:var(--space-md)}.mb-lg{margin-bottom:var(--space-lg)}.mb-xl{margin-bottom:var(--space-xl)}.mt-md{margin-top:var(--space-md)}.text-muted{color:var(--text-muted)}.text-sm{font-size:var(--font-size-sm)}.text-xs{font-size:var(--font-size-xs)}.font-bold{font-weight:700}.w-full{width:100%}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.gradient-text{background:linear-gradient(135deg, var(--primary-light), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hamburger-btn{background:var(--bg-glass);border:1px solid var(--border);color:var(--text-primary);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-fast);justify-content:center;align-items:center;padding:.5rem;display:none}.hamburger-btn:hover{background:var(--bg-glass-hover)}.sidebar-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:99;background:#0009;display:none;position:fixed;inset:0}@media (width<=768px){.hamburger-btn{display:flex}.sidebar-overlay.visible{display:block}.main-content{padding:var(--space-md);margin-left:0!important}.sidebar{z-index:100;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.stats-grid{grid-template-columns:repeat(2,1fr)}.courses-grid{grid-template-columns:1fr}.page-header{align-items:flex-start;gap:var(--space-md);flex-direction:column}.tab-bar{overflow-x:auto}}@media (width<=480px){.stats-grid,.role-selector,.quiz-options-grid{grid-template-columns:1fr}.badge-grid{grid-template-columns:repeat(3,1fr)}}.gamification-row{gap:var(--space-md);margin-bottom:var(--space-lg);display:flex}.xp-widget{border-radius:var(--radius-lg);padding:var(--space-md) var(--space-lg);background:linear-gradient(135deg,#6366f11f,#06b6d414);border:1px solid #6366f140;flex:1}.xp-widget .level-badge{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;border-radius:var(--radius-full);padding:2px 10px;font-size:.75rem;font-weight:700;display:inline-block}.xp-bar-track{border-radius:var(--radius-full);height:8px;margin-top:var(--space-sm);background:#ffffff14;overflow:hidden}.xp-bar-fill{background:linear-gradient(90deg, var(--primary), var(--secondary));border-radius:var(--radius-full);height:100%;transition:width .8s}.streak-widget{border-radius:var(--radius-lg);padding:var(--space-md) var(--space-lg);align-items:center;gap:var(--space-md);background:linear-gradient(135deg,#f59e0b1f,#ef444414);border:1px solid #f59e0b40;flex:1;display:flex}.streak-flame{font-size:2.2rem}.streak-days{font-size:var(--font-size-2xl);color:var(--accent);font-weight:800}.streak-label{color:var(--text-muted);font-size:var(--font-size-sm)}.badge-grid{gap:var(--space-md);margin-top:var(--space-md);grid-template-columns:repeat(auto-fill,minmax(130px,1fr));display:grid}.badge-item{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-lg);padding:var(--space-md);text-align:center;transition:var(--transition-base);position:relative}.badge-item.earned{background:#6366f10d;border-color:#6366f14d}.badge-item.locked{opacity:.4;filter:grayscale()}.badge-icon{margin-bottom:var(--space-xs);font-size:2rem}.badge-name{font-size:var(--font-size-sm);color:var(--text-primary);font-weight:600}.badge-desc{font-size:var(--font-size-xs);color:var(--text-muted);margin-top:4px}.badge-rarity{border-radius:var(--radius-full);text-transform:uppercase;padding:2px 6px;font-size:.6rem;font-weight:700;position:absolute;top:6px;right:6px}.badge-rarity.common{color:#94a3b8;background:#94a3b826}.badge-rarity.rare{color:#60a5fa;background:#3b82f626}.badge-rarity.epic{color:#a78bfa;background:#8b5cf626}.badge-rarity.legendary{color:#fbbf24;background:#f59e0b26}.chart-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--radius-xl);padding:var(--space-xl);margin-bottom:var(--space-lg)}.ai-chat-fab{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;z-index:1000;width:56px;height:56px;transition:var(--transition-base);border:none;border-radius:50%;justify-content:center;align-items:center;display:flex;position:fixed;bottom:2rem;right:2rem;box-shadow:0 8px 24px #6366f166}.ai-chat-fab:hover{transform:scale(1.08)}.ai-chat-window{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);z-index:1000;width:360px;height:480px;box-shadow:var(--shadow-lg);flex-direction:column;display:flex;position:fixed;bottom:6rem;right:2rem;overflow:hidden}.ai-chat-header{padding:var(--space-md);background:var(--bg-secondary);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;display:flex}.ai-chat-messages{padding:var(--space-md);gap:var(--space-md);flex-direction:column;flex:1;display:flex;overflow-y:auto}.ai-message{max-width:80%;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-lg);font-size:var(--font-size-sm);line-height:1.5}.ai-message.user{background:var(--primary);color:#fff;border-bottom-right-radius:2px;align-self:flex-end}.ai-message.assistant{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border);border-bottom-left-radius:2px;align-self:flex-start}.ai-message.thinking{padding:var(--space-md);gap:4px;display:flex}.ai-thinking-dot{background:var(--text-muted);border-radius:50%;width:6px;height:6px;animation:1.4s infinite thinking}.ai-thinking-dot:nth-child(2){animation-delay:.2s}.ai-thinking-dot:nth-child(3){animation-delay:.4s}@keyframes thinking{0%,to{opacity:.4;transform:scale(.6)}50%{opacity:1;transform:scale(1)}}.ai-chat-input-row{gap:var(--space-sm);padding:var(--space-md);border-top:1px solid var(--border);background:var(--bg-card);display:flex}.ai-chat-input{padding:var(--space-sm);border-radius:var(--radius-md);border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-primary);outline:none;flex:1}.ai-chat-input:focus{border-color:var(--primary)}