:root{--color-primary: #6366f1;--color-primary-light: #818cf8;--color-primary-dark: #4f46e5;--color-primary-accent: #8b5cf6;--color-primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--color-primary-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);--color-secondary: #fbbf24;--color-secondary-light: #fcd34d;--color-secondary-dark: #f59e0b;--color-secondary-muted: #fef3c7;--color-slate-50: #f8fafc;--color-slate-100: #f1f5f9;--color-slate-200: #e2e8f0;--color-slate-300: #cbd5e1;--color-slate-400: #94a3b8;--color-slate-500: #64748b;--color-slate-600: #475569;--color-slate-700: #334155;--color-slate-800: #1e293b;--color-slate-900: #0f172a;--color-slate-950: #020617;--color-success: #22c55e;--color-success-light: #4ade80;--color-success-dark: #16a34a;--color-success-bg: #dcfce7;--color-success-border: #86efac;--color-danger: #ef4444;--color-danger-light: #f87171;--color-danger-dark: #dc2626;--color-danger-bg: #fee2e2;--color-danger-border: #fca5a5;--color-warning: #f59e0b;--color-warning-light: #fbbf24;--color-warning-dark: #d97706;--color-warning-bg: #fef3c7;--color-warning-border: #fcd34d;--color-info: #3b82f6;--color-info-light: #60a5fa;--color-info-dark: #2563eb;--color-info-bg: #dbeafe;--color-info-border: #93c5fd;--color-background: #f8fafc;--color-surface: #ffffff;--color-surface-elevated: #ffffff;--color-surface-muted: #f1f5f9;--color-border: #e2e8f0;--color-border-muted: #f1f5f9;--color-text: #1e293b;--color-text-secondary: #475569;--color-text-muted: #64748b;--color-text-disabled: #94a3b8;--color-text-inverse: #ffffff;--color-text-on-primary: #ffffff;--font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;--font-family-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--font-family-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, 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;--font-size-5xl: 3rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--font-weight-extrabold: 800;--line-height-none: 1;--line-height-tight: 1.25;--line-height-snug: 1.375;--line-height-normal: 1.5;--line-height-relaxed: 1.625;--line-height-loose: 2;--letter-spacing-tighter: -.05em;--letter-spacing-tight: -.025em;--letter-spacing-normal: 0;--letter-spacing-wide: .025em;--letter-spacing-wider: .05em;--letter-spacing-widest: .1em;--spacing-px: 1px;--spacing-0: 0;--spacing-0-5: .125rem;--spacing-1: .25rem;--spacing-1-5: .375rem;--spacing-2: .5rem;--spacing-2-5: .625rem;--spacing-3: .75rem;--spacing-3-5: .875rem;--spacing-4: 1rem;--spacing-5: 1.25rem;--spacing-6: 1.5rem;--spacing-7: 1.75rem;--spacing-8: 2rem;--spacing-9: 2.25rem;--spacing-10: 2.5rem;--spacing-12: 3rem;--spacing-14: 3.5rem;--spacing-16: 4rem;--spacing-20: 5rem;--radius-none: 0;--radius-sm: .125rem;--radius-default: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--radius-xl: .75rem;--radius-2xl: 1rem;--radius-3xl: 1.5rem;--radius-full: 9999px;--border-width: 1px;--border-width-2: 2px;--border-width-4: 4px;--shadow-xs: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-sm: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / .25);--shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / .05);--shadow-none: 0 0 #0000;--shadow-primary: 0 4px 14px 0 rgb(99 102 241 / .35);--shadow-primary-lg: 0 10px 25px -3px rgb(99 102 241 / .4);--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease;--transition-slower: .5s ease;--z-dropdown: 1000;--z-sticky: 1020;--z-fixed: 1030;--z-modal-backdrop: 1040;--z-modal: 1050;--z-popover: 1060;--z-tooltip: 1070;--z-toast: 1080}@media(prefers-color-scheme:dark){:root{--color-background: #0f172a;--color-surface: #1e293b;--color-surface-elevated: #334155;--color-surface-muted: #1e293b;--color-border: #334155;--color-border-muted: #1e293b;--color-text: #f1f5f9;--color-text-secondary: #cbd5e1;--color-text-muted: #94a3b8;--color-text-disabled: #64748b;--color-text-inverse: #0f172a;--color-success-bg: #14532d;--color-success-border: #166534;--color-danger-bg: #7f1d1d;--color-danger-border: #991b1b;--color-warning-bg: #78350f;--color-warning-border: #92400e;--color-info-bg: #1e3a8a;--color-info-border: #1e40af;--shadow-xs: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-sm: 0 1px 3px 0 rgb(0 0 0 / .4), 0 1px 2px -1px rgb(0 0 0 / .4);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .4), 0 2px 4px -2px rgb(0 0 0 / .4);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4), 0 4px 6px -4px rgb(0 0 0 / .4);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .5), 0 8px 10px -6px rgb(0 0 0 / .5);--shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / .6);--shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / .2);--shadow-primary: 0 4px 14px 0 rgb(99 102 241 / .25);--shadow-primary-lg: 0 10px 25px -3px rgb(99 102 241 / .3)}}:root{font-family:var(--font-family-sans);line-height:var(--line-height-normal);font-weight:var(--font-weight-normal);color:var(--color-text);background-color:var(--color-background);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(max-width:360px){:root{--font-size-base: .875rem;--font-size-lg: 1rem;--font-size-xl: 1.125rem;--font-size-2xl: 1.25rem;--font-size-3xl: 1.5rem;--spacing-4: .875rem;--spacing-5: 1rem;--spacing-6: 1.25rem;--spacing-8: 1.5rem;--radius-xl: .5rem;--radius-2xl: .75rem;--radius-3xl: 1rem}}@media(max-width:480px){html{font-size:15px}}@media(min-width:768px){html{font-size:16px}}.notification-bell{position:relative}.bell-button{background:none;border:none;padding:.5rem;cursor:pointer;position:relative;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background .2s}.bell-button:hover{background:#0000000d}.bell-icon{font-size:1.25rem}.bell-button.has-unread .bell-icon{animation:ring .5s ease-in-out}@keyframes ring{0%,to{transform:rotate(0)}25%{transform:rotate(15deg)}50%{transform:rotate(-15deg)}75%{transform:rotate(10deg)}}.unread-badge{position:absolute;top:0;right:0;background:#ef4444;color:#fff;font-size:.65rem;font-weight:600;min-width:16px;height:16px;border-radius:8px;display:flex;align-items:center;justify-content:center;padding:0 4px}.notification-dropdown{position:absolute;top:calc(100% + 8px);right:0;width:320px;max-height:420px;background:#fff;border-radius:.75rem;box-shadow:0 10px 40px #00000026;z-index:1000;overflow:hidden;display:flex;flex-direction:column}.dropdown-header{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;border-bottom:1px solid #e2e8f0}.dropdown-header h3{margin:0;font-size:.95rem;color:#1e293b}.mark-all-read{background:none;border:none;color:#6366f1;font-size:.8rem;cursor:pointer;padding:.25rem .5rem;border-radius:.25rem}.mark-all-read:hover{background:#f0f0ff}.mark-all-read:disabled{opacity:.5;cursor:not-allowed}.notification-list{flex:1;overflow-y:auto}.empty-notifications{padding:2rem;text-align:center;color:#64748b}.empty-icon{font-size:2.5rem;display:block;margin-bottom:.5rem}.empty-notifications p{margin:0}.notification-item{display:flex;gap:.75rem;padding:.875rem 1rem;cursor:pointer;transition:background .2s;position:relative;border-bottom:1px solid #f1f5f9}.notification-item:hover{background:#f8fafc}.notification-item.unread{background:#faf5ff}.notification-item.unread:hover{background:#f5f3ff}.notification-icon{font-size:1.5rem;flex-shrink:0;width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:#f1f5f9;border-radius:50%}.notification-item.unread .notification-icon{background:#e9d5ff}.notification-content{flex:1;min-width:0}.notification-title{margin:0 0 .25rem;font-size:.9rem;font-weight:500;color:#1e293b}.notification-body{margin:0 0 .25rem;font-size:.8rem;color:#64748b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.notification-time{font-size:.7rem;color:#94a3b8}.unread-dot{position:absolute;top:50%;right:12px;transform:translateY(-50%);width:8px;height:8px;background:#6366f1;border-radius:50%}.dropdown-footer{padding:.75rem 1rem;text-align:center;border-top:1px solid #e2e8f0;background:#f8fafc}.dropdown-footer a{color:#6366f1;font-size:.85rem;text-decoration:none}.dropdown-footer a:hover{text-decoration:underline}@media(max-width:640px){.notification-dropdown{position:fixed;top:60px;left:0;right:0;width:100%;max-height:calc(100vh - 60px);border-radius:0}}@media(max-width:360px){.bell-button{min-width:36px;min-height:36px;width:36px;height:36px;padding:.4rem}.bell-icon{font-size:1.1rem}.unread-badge{min-width:14px;height:14px;font-size:.6rem;top:-2px;right:-2px}.notification-dropdown{top:52px;max-height:calc(100vh - 52px)}}@media(hover:none),(pointer:coarse){.bell-button{min-width:44px;min-height:44px;padding:.625rem}.bell-icon{font-size:1.5rem}.mark-all-read{min-height:36px;padding:.5rem .75rem;font-size:.85rem}.notification-item{min-height:60px;padding:1rem}.dropdown-footer a{display:inline-block;min-height:44px;padding:.75rem 1rem;line-height:1.5}}@media(hover:none){.bell-button:active{background:#0000001a;transform:scale(.95)}.mark-all-read:active:not(:disabled){background:#ddd6fe;transform:scale(.98)}.notification-item:active{background:#f1f5f9;transform:scale(.99)}.notification-item.unread:active{background:#ede9fe}.dropdown-footer a:active{color:#4338ca;background:#f1f5f9}.bell-button,.mark-all-read,.notification-item,.dropdown-footer a{-webkit-tap-highlight-color:transparent}}@media(hover:hover){.bell-button:hover{background:#0000000d}.mark-all-read:hover{background:#f0f0ff}.notification-item:hover{background:#f8fafc}.notification-item.unread:hover{background:#f5f3ff}.dropdown-footer a:hover{text-decoration:underline}}.bell-button:focus-visible,.mark-all-read:focus-visible,.notification-item:focus-visible,.dropdown-footer a:focus-visible{outline:3px solid #6366f1;outline-offset:2px}.token-help-overlay{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;animation:fadeIn .2s ease}.token-help-modal{background:#fff;border-radius:1.5rem;max-width:600px;min-width:min(600px,95vw);width:100%;max-height:90vh;overflow-y:auto;position:relative;box-shadow:0 25px 50px -12px #00000040;animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.token-help-close{position:absolute;top:1rem;right:1rem;background:#f3f4f6;border:none;width:36px;height:36px;border-radius:50%;font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#6b7280;transition:all .2s;line-height:1}.token-help-close:hover{background:#e5e7eb;color:#374151;transform:scale(1.1)}.token-help-header{background:linear-gradient(135deg,#fbbf24,#f59e0b);padding:2rem;text-align:center;border-radius:1.5rem 1.5rem 0 0}.token-help-icon{font-size:3rem;display:block;margin-bottom:.5rem}.token-help-header h2{color:#fff;font-size:1.75rem;margin:0;text-shadow:0 2px 4px rgba(0,0,0,.1)}.token-help-subtitle{color:#ffffffe6;margin:.5rem 0 0;font-size:1rem}.token-help-content{padding:1.5rem;display:flex;flex-direction:column;gap:1rem}.token-section{display:flex;gap:1rem;padding:1rem;background:#f9fafb;border-radius:1rem;border-left:4px solid #6366f1}.token-section-earn{border-left-color:#10b981;background:#ecfdf5}.token-section-spend{border-left-color:#f59e0b;background:#fffbeb}.token-section-tips{border-left-color:#8b5cf6;background:#f5f3ff}.token-section-icon{font-size:2rem;flex-shrink:0}.token-section-content{flex:1}.token-section-content h3{margin:0 0 .5rem;font-size:1.1rem;color:#1f2937}.token-section-content p{margin:0;color:#4b5563;font-size:.95rem;line-height:1.5}.token-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.75rem}.token-list li{display:flex;align-items:flex-start;gap:.5rem;color:#4b5563;font-size:.95rem;line-height:1.4}.token-list-icon{font-size:1.1rem;flex-shrink:0}.token-list strong{color:#1f2937}.token-help-footer{padding:1rem 1.5rem 1.5rem;display:flex;justify-content:center}.token-help-btn{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;border:none;padding:.875rem 2.5rem;border-radius:2rem;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .2s;box-shadow:0 4px 12px #6366f14d}.token-help-btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px #6366f166}.token-help-btn:active{transform:translateY(0)}@media(max-width:480px){.token-help-modal{border-radius:1rem}.token-help-header{padding:1.5rem;border-radius:1rem 1rem 0 0}.token-help-icon{font-size:2.5rem}.token-help-header h2{font-size:1.5rem}.token-help-content{padding:1rem}.token-section{padding:.875rem}.token-section-icon{font-size:1.5rem}.token-section-content h3{font-size:1rem}.token-section-content p,.token-list li{font-size:.9rem}}.avatar-builder{background:#fff;border-radius:1rem;padding:1.5rem;max-width:500px;margin:0 auto}.avatar-builder-preview{display:flex;flex-direction:column;align-items:center;gap:1rem;margin-bottom:1.5rem;padding-bottom:1.5rem;border-bottom:1px solid #e2e8f0}.avatar-builder-preview .avatar-svg{box-shadow:0 4px 15px #00000026}.randomize-btn{display:flex;align-items:center;gap:.35rem}.avatar-builder-controls{margin-bottom:1.5rem}.category-tabs{display:flex;gap:.25rem;margin-bottom:1rem;overflow-x:auto;padding-bottom:.5rem;-webkit-overflow-scrolling:touch}.category-tab{display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:.5rem .75rem;border:none;background:#f1f5f9;border-radius:.5rem;cursor:pointer;transition:all .2s;min-width:60px;flex-shrink:0}.category-tab:hover{background:#e2e8f0}.category-tab.active{background:#6366f1;color:#fff}.tab-label{font-size:.65rem;font-weight:500;white-space:nowrap}.options-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:.5rem}.option-btn{padding:.75rem .5rem;border:2px solid #e2e8f0;background:#fff;border-radius:.5rem;cursor:pointer;transition:all .2s;font-size:.85rem;font-weight:500;color:#475569;position:relative}.option-btn:hover{border-color:#6366f1}.option-btn.selected{border-color:#6366f1;background:#ede9fe;color:#4f46e5}.option-btn.color-option{aspect-ratio:1;border-radius:50%;padding:0;min-height:45px}.option-btn.color-option.selected{box-shadow:0 0 0 3px #fff,0 0 0 5px #6366f1}.option-btn .check{position:absolute;top:2px;right:4px;font-size:.75rem;color:#6366f1}.option-btn.color-option .check{top:50%;left:50%;right:auto;transform:translate(-50%,-50%);color:#fff;font-size:1rem;text-shadow:0 1px 2px rgba(0,0,0,.5)}.avatar-builder-actions{display:flex;gap:.75rem;justify-content:flex-end}.avatar-svg{display:block;overflow:visible}.avatar-mini-placeholder{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e0e7ff,#c7d2fe);border-radius:50%}.avatar-modal{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.avatar-modal .avatar-builder{max-height:90vh;overflow-y:auto}@media(max-width:480px){.avatar-builder{padding:1rem}.category-tabs{gap:.35rem}.category-tab{padding:.4rem .5rem;min-width:50px}.tab-icon{font-size:1rem}.tab-label{font-size:.6rem}.options-grid{grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:.35rem}.option-btn{padding:.5rem .35rem;font-size:.75rem}.avatar-builder-actions{flex-direction:column}.avatar-builder-actions .btn{width:100%}}.header{background:linear-gradient(135deg,#6366f1,#8b5cf6);padding:.5rem 1rem;position:-webkit-sticky;position:sticky;top:0;z-index:100;box-shadow:0 2px 10px #0003;transform:translateZ(0);-webkit-transform:translateZ(0)}.header.header-static{position:relative}.header-content{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1rem;height:44px}.logo{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:#fff;font-weight:700;font-size:1.25rem;flex-shrink:0}.logo-accent{color:#fbbf24}.logo-icon{font-size:1.5rem}.desktop-nav{display:flex;gap:.5rem;flex:1;justify-content:center}.nav-link{color:#ffffffe6;text-decoration:none;font-weight:500;padding:.5rem .75rem;border-radius:.5rem;transition:all .2s;font-size:.875rem;white-space:nowrap}.nav-link:hover{background:#ffffff26;color:#fff}.nav-create{background:#fff3}.nav-teacher{background:#10b9814d;color:#fff}.nav-admin{background:#ef44444d;color:#fff}.nav-leaderboard{background:#fbbf244d;color:#fff}.header-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.token-display{display:flex;align-items:center;gap:.25rem;background:#fff3;padding:.35rem .6rem;border-radius:2rem;font-weight:600;color:#fff;font-size:.875rem}.token-icon{font-size:1rem}.token-display-clickable{border:none;cursor:pointer;transition:all .2s}.token-display-clickable:hover{background:#ffffff59}.avatar-link{display:flex;align-items:center}.avatar-link .avatar-svg{border:2px solid rgba(255,255,255,.5);box-shadow:0 2px 4px #0003}.avatar-link:hover .avatar-svg{border-color:#fff}.header-profile-link{display:flex;align-items:center;gap:.35rem;text-decoration:none;padding:.2rem .5rem .2rem .2rem;border-radius:2rem;background:#ffffff1a;transition:background .2s}.header-profile-link:hover{background:#fff3}.header-profile-link .avatar-svg{border:2px solid rgba(255,255,255,.5);box-shadow:0 2px 4px #0003}.header-profile-link:hover .avatar-svg{border-color:#fff}.header-level-badge{color:#fbbf24;font-size:.7rem;font-weight:700;text-shadow:0 1px 2px rgba(0,0,0,.3)}.desktop-only{display:flex;align-items:center}.mobile-only{display:none}.hamburger-btn{background:#fff3;border:none;color:#fff;width:44px;height:44px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.hamburger-btn:hover{background:#ffffff4d}.hamburger-icon{font-size:1.5rem}.mobile-menu-overlay{position:fixed;inset:0;background:#0009;z-index:200;animation:fadeIn .2s ease}.mobile-menu{position:fixed;top:0;right:0;width:min(300px,85vw);height:100vh;background:var(--card-bg, #1a1a2e);box-shadow:-4px 0 20px #0000004d;animation:slideIn .3s ease;overflow-y:auto;display:flex;flex-direction:column}@keyframes 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