.auth-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;display:flex;align-items:center;justify-content:center;background-color:#00000080}.auth-dialog{background-color:#fff;border-radius:.5rem;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;width:100%;max-width:28rem;padding:1.5rem;position:relative;font-family:system-ui,-apple-system,sans-serif}.auth-dialog-lg{max-width:32rem;display:flex;flex-direction:column;max-height:90vh}.auth-close-btn{position:absolute;top:1rem;right:1rem;color:#6b7280;background:none;border:none;cursor:pointer;font-size:1.25rem;line-height:1}.auth-close-btn:hover{color:#374151}.auth-title{font-size:1.5rem;font-weight:700;margin-bottom:1.5rem;text-align:center;color:#1f2937}.auth-error{background-color:#fef2f2;color:#dc2626;padding:.75rem;border-radius:.25rem;margin-bottom:1rem;font-size:.875rem}.auth-form-group{margin-bottom:1rem}.auth-label{display:block;font-size:.875rem;font-weight:500;color:#374151;margin-bottom:.25rem}.auth-input{width:100%;padding:.5rem .75rem;border:1px solid #d1d5db;border-radius:.25rem;font-size:1rem;outline:none;transition:border-color .2s,box-shadow .2s;box-sizing:border-box}.auth-input:focus{border-color:#3b82f6;box-shadow:0 0 0 2px #3b82f680}.auth-submit-btn{width:100%;padding:.5rem 1rem;background-color:#2563eb;color:#fff;border-radius:.25rem;font-weight:500;border:none;cursor:pointer;transition:background-color .2s}.auth-submit-btn:hover{background-color:#1d4ed8}.auth-submit-btn:disabled{opacity:.5;cursor:not-allowed}.auth-submit-btn.success{background-color:#16a34a}.auth-submit-btn.success:hover{background-color:#15803d}.auth-footer{margin-top:1.5rem;text-align:center;font-size:.875rem;color:#4b5563}.auth-link{color:#2563eb;background:none;border:none;cursor:pointer;padding:0;font-weight:500;text-decoration:none}.auth-link:hover{text-decoration:underline}.auth-progress-track{width:100%;background-color:#e5e7eb;height:.5rem;border-radius:9999px;margin-bottom:1.5rem}.auth-progress-fill{background-color:#2563eb;height:.5rem;border-radius:9999px;transition:width .3s ease}.auth-scroll-area{flex:1;overflow-y:auto;padding-right:.25rem}.auth-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.auth-role-option{display:block;padding:1rem;border:1px solid #e5e7eb;border-radius:.5rem;cursor:pointer;transition:all .2s;margin-bottom:.75rem}.auth-role-option:hover{border-color:#93c5fd}.auth-role-option.selected{border-color:#3b82f6;background-color:#eff6ff}.auth-role-header{display:flex;align-items:center;margin-bottom:.25rem}.auth-role-header input{margin-right:.75rem}.auth-role-desc{font-size:.875rem;color:#6b7280;margin-left:1.75rem}.auth-summary{background-color:#eff6ff;padding:1rem;border-radius:.5rem;font-size:.875rem;color:#1e40af;margin-bottom:1.5rem}.auth-checkbox-group{display:flex;align-items:flex-start}.auth-checkbox-group input{margin-top:.25rem;margin-right:.75rem}.auth-dialog-actions{margin-top:1.5rem;padding-top:1rem;border-top:1px solid #f3f4f6;display:flex;justify-content:space-between}.auth-back-btn{padding:.5rem 1rem;color:#4b5563;background:none;border:none;cursor:pointer}.auth-back-btn:hover{color:#1f2937}.auth-title-spaced{margin-bottom:.5rem}.auth-step-heading{font-size:1.125rem;margin-bottom:1rem;color:#111827;font-weight:600}.auth-form-group-spaced{margin-top:1rem}.auth-helper-text{font-size:.78rem;color:#6b7280;margin:.35rem 0 0}.auth-label-optional{font-weight:400;color:#9ca3af;font-size:.82rem}.auth-summary-line{margin-top:.5rem}.auth-checkbox-text{font-size:.875rem;color:#4b5563}.auth-submit-btn-auto{width:auto}.auth-confirmation{text-align:center;padding:2rem .5rem 1rem}.auth-confirmation-icon{font-size:3rem;margin-bottom:.75rem}.auth-confirmation-title{font-size:1.25rem;font-weight:600;color:#111827;margin:0 0 1rem}.auth-confirmation-text{color:#374151;margin:0 0 .75rem;line-height:1.55}.auth-confirmation-text strong{color:#111827}.auth-confirmation-hint{font-size:.85rem;color:#6b7280;margin:.75rem 0 1.5rem}.tool-gallery-mode{height:100vh;display:flex;flex-direction:column;background:#f8fafc}.tool-gallery-header{padding:2rem;background:linear-gradient(135deg,#06b6d4,#3b82f6 60%,#8b5cf6);color:#fff;text-align:center;flex-shrink:0}.tool-gallery-header-content{max-width:1400px;margin:0 auto}.tool-gallery-header h1{font-size:2.5rem;margin:0 0 .5rem;font-weight:700}.tool-gallery-header p{font-size:1.1rem;margin:0;opacity:.9}.tool-gallery-header-actions{position:absolute;top:1rem;right:1rem;display:flex;align-items:center;gap:.75rem}.tool-gallery-body{flex:1;overflow-y:auto;padding:2rem 2rem 4rem}.tool-gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;max-width:1400px;margin:0 auto}.tool-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 2px 12px #0000000f;cursor:pointer;transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}.tool-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #0000001f}.tool-card:focus-visible{outline:2px solid #3b82f6;outline-offset:2px}.tool-card-gradient{height:6px;flex-shrink:0}.tool-card-body{padding:1.5rem;display:flex;flex-direction:column;gap:.75rem;flex:1}.tool-card-icon{font-size:2.5rem;line-height:1}.tool-card-name{font-size:1.15rem;font-weight:600;color:#1f2937;margin:0}.tool-card-desc{font-size:.875rem;color:#6b7280;line-height:1.5;margin:0;flex:1}.tool-card-tags{display:flex;flex-wrap:wrap;gap:.375rem;margin-top:auto}.tool-subject-tag{padding:.2rem .6rem;font-size:.7rem;font-weight:600;border-radius:12px;border:1.5px solid;background:#f9fafb}.tool-detail-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:100;animation:tool-fade-in .2s ease}@keyframes tool-fade-in{0%{opacity:0}to{opacity:1}}.tool-detail-panel{position:fixed;top:0;right:0;bottom:0;width:420px;max-width:100vw;background:#fff;z-index:101;display:flex;flex-direction:column;box-shadow:-4px 0 24px #00000026;animation:tool-slide-in-right .25s ease}@keyframes tool-slide-in-right{0%{transform:translate(100%)}to{transform:translate(0)}}.tool-detail-banner{padding:2rem;color:#fff;text-align:center;flex-shrink:0;position:relative}.tool-detail-close{position:absolute;top:.75rem;right:.75rem;width:36px;height:36px;border-radius:50%;border:none;background:#fff3;color:#fff;font-size:1.25rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.tool-detail-close:hover{background:#ffffff59}.tool-detail-icon{font-size:4rem;line-height:1;margin-bottom:.75rem}.tool-detail-name{font-size:1.5rem;font-weight:700;margin:0 0 .5rem}.tool-detail-desc{font-size:.95rem;opacity:.9;margin:0;line-height:1.5}.tool-detail-content{flex:1;overflow-y:auto;padding:1.5rem;display:flex;flex-direction:column;gap:1.5rem}.tool-detail-section h3{font-size:.85rem;font-weight:600;color:#64748b;text-transform:uppercase;letter-spacing:.5px;margin:0 0 .75rem}.tool-detail-features{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.625rem}.tool-detail-features li{display:flex;align-items:flex-start;gap:.625rem;font-size:.9rem;color:#374151;line-height:1.4}.tool-feature-bullet{flex-shrink:0;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.65rem;color:#fff;margin-top:1px}.tool-detail-subjects{display:flex;flex-wrap:wrap;gap:.5rem}.tool-detail-subject-badge{display:flex;align-items:center;gap:.375rem;padding:.375rem .75rem;border-radius:20px;font-size:.85rem;font-weight:500;border:1.5px solid;background:#f9fafb}.tool-detail-footer{padding:1.25rem 1.5rem;border-top:1px solid #e5e7eb;flex-shrink:0}.tool-open-btn{display:block;width:100%;padding:.875rem;font-size:1rem;font-weight:600;color:#fff;border:none;border-radius:12px;cursor:pointer;transition:opacity .2s,transform .1s}.tool-open-btn:hover{opacity:.9}.tool-open-btn:active{transform:scale(.98)}@media (max-width: 768px){.tool-gallery-header{padding:1.5rem}.tool-gallery-header h1{font-size:1.75rem}.tool-gallery-header p{font-size:1rem}.tool-gallery-body{padding:1.5rem}.tool-gallery-grid{gap:1rem}.tool-detail-panel{top:auto;left:0;right:0;bottom:0;width:100%;max-height:85vh;border-radius:20px 20px 0 0;animation:tool-slide-in-up .25s ease}@keyframes tool-slide-in-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}.tool-detail-banner{padding:1.5rem}.tool-detail-icon{font-size:3rem}.tool-detail-name{font-size:1.25rem}}@media (max-width: 640px){.tool-gallery-header{padding:4.5rem 1rem 1rem}.tool-gallery-header h1{font-size:1.5rem}.tool-gallery-header p{font-size:.9rem}.tool-gallery-body{padding:1rem}.tool-gallery-grid{grid-template-columns:1fr}.tool-card-body{padding:1.25rem}}@media (max-width: 480px){.tool-gallery-header{padding-top:5rem}.tool-gallery-header h1{font-size:1.25rem}}@media (prefers-reduced-motion: reduce){.tool-card,.tool-detail-panel,.tool-detail-backdrop,.tool-open-btn{transition:none!important;animation:none!important}.tool-card:hover{transform:none!important}}.landing-page{min-height:100vh;background:linear-gradient(135deg,#f8f9fa,#e9ecef,#f8f9fa);overflow-x:hidden}.landing-header{position:sticky;top:0;z-index:1000;background:#fffffffa;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid #e5e7eb;box-shadow:0 2px 8px #0000000a}.landing-header-content{max-width:1400px;margin:0 auto;padding:.625rem 2rem;display:flex;justify-content:space-between;align-items:center;min-height:60px}.landing-logo{display:flex;align-items:center;cursor:pointer;transition:transform .2s}.landing-logo:hover{transform:scale(1.05)}.logo-text-animated{font-size:1.75rem;font-weight:900;letter-spacing:-.02em;background:linear-gradient(120deg,#0ea5e9,#06b6d4 30%,#f59e0b 70%,#fb923c);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;position:relative;filter:brightness(1);animation:subtle-glow 4s ease-in-out infinite}.logo-text-animated-footer{font-size:2rem;font-weight:900;letter-spacing:-.02em;background:linear-gradient(120deg,#0ea5e9,#06b6d4 30%,#f59e0b 70%,#fb923c);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;margin-bottom:1rem;display:inline-block;filter:brightness(1);animation:subtle-glow 4s ease-in-out infinite}@keyframes subtle-glow{0%,to{filter:brightness(1)}50%{filter:brightness(1.15)}}.landing-header-actions{display:flex;align-items:center;gap:.75rem}.btn-login{padding:.5rem 1.25rem;background:transparent;border:2px solid var(--color-purple-primary);color:var(--color-purple-primary);border-radius:8px;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s;white-space:nowrap}.btn-login:hover{background:var(--color-purple-primary);color:#fff}.btn-dashboard{padding:.5rem 1.25rem;background:var(--color-purple-gradient);border:none;color:#fff;border-radius:8px;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s;white-space:nowrap}.btn-dashboard:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea4d}.btn-admin-link{background:linear-gradient(135deg,#7c3aed,#6d28d9)}.btn-admin-link:hover{box-shadow:0 4px 12px #7c3aed4d}.btn-cta-small{padding:.5rem 1.25rem;background:linear-gradient(135deg,#10b981,#059669);border:none;color:#fff;border-radius:8px;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s;white-space:nowrap}.btn-cta-small:hover{transform:translateY(-2px);box-shadow:0 4px 12px #10b9814d}.landing-hero{max-width:1400px;margin:0 auto;padding:6rem 2rem;display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}.landing-hero-title{font-size:3.5rem;font-weight:800;line-height:1.2;color:#1f2937;margin:0 0 1.5rem}.highlight-gradient{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.landing-hero-subtitle{font-size:1.25rem;color:#6b7280;line-height:1.7;margin:0 0 2rem}.landing-hero-actions{display:flex;gap:1rem;margin-bottom:2rem}.btn-cta-primary{display:flex;align-items:center;gap:.75rem;padding:1rem 2rem;background:linear-gradient(135deg,#667eea,#764ba2);border:none;color:#fff;border-radius:12px;font-size:1.1rem;font-weight:700;cursor:pointer;transition:all .3s;box-shadow:0 4px 16px #667eea4d;position:relative;overflow:hidden}.btn-cta-primary:hover{transform:translateY(-3px);box-shadow:0 8px 24px #667eea66}.btn-icon{font-size:1.3rem}.btn-badge{position:absolute;top:-8px;right:-8px;background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:.25rem .75rem;border-radius:12px;font-size:.75rem;font-weight:600;box-shadow:0 2px 8px #10b9814d}.btn-cta-secondary{padding:1rem 2rem;background:#fff;border:2px solid #e5e7eb;color:#667eea;border-radius:12px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .2s}.btn-cta-secondary:hover{border-color:#667eea;box-shadow:0 4px 12px #667eea26}.landing-hero-trust{display:flex;gap:2rem}.trust-badge{display:flex;align-items:center;gap:.5rem;color:#6b7280;font-size:.95rem}.trust-icon{color:#10b981;font-weight:700}.landing-hero-visual{position:relative}.hero-card{background:#fff;border-radius:20px;padding:2rem;box-shadow:0 20px 60px #00000026;border:2px solid #e5e7eb}.demo-header{font-size:1rem;font-weight:600;color:#1f2937;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:2px solid #e5e7eb;display:flex;flex-direction:column;gap:.5rem}.demo-subtitle{font-size:.85rem;color:#6b7280;font-weight:500}.interactive-demo{position:relative;min-height:450px}.demo-content{position:relative;padding:1rem;background:linear-gradient(135deg,#1e293b,#0f172a);border-radius:16px}.led-strip{display:flex;justify-content:center;gap:.75rem;margin-bottom:2rem;padding:1rem;background:#0f172a99;border-radius:12px}.led-light{width:24px;height:24px;border-radius:50%;background:#2d3748;border:2px solid #4a5568;transition:all .2s ease}.led-light.active{border-color:currentColor;transform:scale(1.2)}.piano-keyboard{display:flex;justify-content:center;gap:2px;margin-bottom:1.5rem;padding:1rem;position:relative}.piano-key-container{position:relative;display:flex}.piano-key{border:none;cursor:pointer;font-weight:600;transition:all .1s;position:relative;-webkit-user-select:none;user-select:none}.white-key{width:50px;height:180px;background:linear-gradient(180deg,#fff,#f8f9fa);border-radius:0 0 8px 8px;border:2px solid #e5e7eb;border-top:none;display:flex;align-items:flex-end;justify-content:center;padding-bottom:1rem;box-shadow:0 4px 8px #0000001a}.white-key:hover{background:linear-gradient(180deg,#f8f9fa,#e5e7eb);transform:translateY(2px)}.white-key.pressed{transform:translateY(4px);box-shadow:0 1px 3px #0003}.black-key{position:absolute;left:85%;top:0;width:30px;height:110px;background:linear-gradient(180deg,#1f2937,#111827);border-radius:0 0 6px 6px;border:2px solid #0f172a;border-top:none;z-index:2;box-shadow:0 4px 8px #0000004d}.black-key:hover{background:linear-gradient(180deg,#374151,#1f2937);transform:translateY(2px)}.black-key.pressed{transform:translateY(4px);box-shadow:0 1px 3px #0006}.key-label{color:#6b7280;font-size:.75rem;font-weight:600}.demo-controls{display:flex;flex-wrap:wrap;justify-content:center;gap:.75rem;margin-bottom:1rem}.control-btn{display:flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;background:linear-gradient(135deg,#667eea,#764ba2);border:none;color:#fff;border-radius:10px;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s;box-shadow:0 4px 12px #667eea4d;white-space:nowrap}.control-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 16px #667eea66}.control-btn:disabled{opacity:.6;cursor:not-allowed}.control-btn.active{background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 4px 12px #10b9814d;animation:pulse-glow 1.5s ease-in-out infinite}.control-icon{font-size:1.1rem}@keyframes pulse-glow{0%,to{box-shadow:0 4px 12px #10b9814d}50%{box-shadow:0 4px 20px #10b98199}}.demo-instructions{text-align:center;padding:1rem;background:#ffffff1a;border-radius:12px;border:1px solid rgba(255,255,255,.1)}.instruction-text{margin:0;color:#e5e7eb;font-weight:600;font-size:.9rem;display:flex;align-items:center;justify-content:center;gap:.5rem}.instruction-text.active{color:#10b981}.instruction-icon{font-size:1.2rem}.landing-stats{background:linear-gradient(135deg,#667eea,#764ba2);padding:4rem 2rem}.stats-grid{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:2rem}.stat-card{text-align:center;color:#fff}.stat-icon{font-size:2.5rem;margin-bottom:.5rem}.stat-value{font-size:3rem;font-weight:800;margin-bottom:.25rem}.stat-label{font-size:1rem;opacity:.9}.landing-modules{max-width:1400px;margin:0 auto;padding:6rem 2rem}.section-header{text-align:center;margin-bottom:4rem}.section-title{font-size:2.5rem;font-weight:800;color:#1f2937;margin:0 0 1rem}.section-subtitle{font-size:1.2rem;color:#6b7280;max-width:600px;margin:0 auto}.modules-slider-container{position:relative;max-width:1400px;margin:0 auto;overflow:hidden;padding:0 60px}.modules-slider{display:flex;gap:2rem;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:1rem 0;-webkit-overflow-scrolling:touch;scrollbar-width:none}.modules-slider::-webkit-scrollbar{display:none}.slider-nav{position:absolute;top:50%;transform:translateY(-50%);width:50px;height:50px;background:#fffffff2;border:2px solid #e5e7eb;border-radius:50%;color:#667eea;font-size:2rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:10;transition:all .2s;box-shadow:0 4px 12px #0000001a}.slider-nav:hover{background:#667eea;color:#fff;transform:translateY(-50%) scale(1.1);box-shadow:0 6px 16px #667eea4d}.slider-nav-left{left:-25px}.slider-nav-right{right:-25px}.module-card{background:#fff;border-radius:20px;border:3px solid;overflow:hidden;transition:all .3s;flex:0 0 calc((100% - 4rem) / 3);scroll-snap-align:start;min-width:320px}.module-card:hover{transform:translateY(-8px);box-shadow:0 20px 40px #0000001f}.module-header{padding:1.5rem;color:#fff;display:flex;justify-content:space-between;align-items:center}.module-icon{font-size:2rem}.module-number{font-size:.9rem;font-weight:600;opacity:.9}.module-body{padding:2rem}.module-title{font-size:1.5rem;font-weight:700;color:#1f2937;margin:0 0 .75rem}.module-description{color:#6b7280;margin:0 0 1.5rem;line-height:1.6}.module-highlights{list-style:none;padding:0;margin:0 0 1.5rem}.module-highlights li{display:flex;align-items:center;gap:.5rem;color:#4b5563;margin-bottom:.5rem}.highlight-check{color:#10b981;font-weight:700}.module-footer{display:flex;justify-content:space-between;align-items:center;padding-top:1.5rem;border-top:2px solid #f3f4f6}.module-sessions{color:#6b7280;font-weight:600;font-size:.9rem}.btn-demo{padding:.5rem 1rem;background:transparent;border:2px solid #667eea;color:#667eea;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s}.btn-demo:hover{background:#667eea;color:#fff}.landing-features{background:#fff;padding:6rem 2rem}.features-grid{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-card{text-align:center;padding:2rem;background:#f8f9fa;border-radius:16px;transition:all .3s}.feature-card:hover{background:#fff;box-shadow:0 8px 24px #00000014}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-title{font-size:1.25rem;font-weight:700;color:#1f2937;margin:0 0 .5rem}.feature-description{color:#6b7280;line-height:1.6}.landing-cta{background:linear-gradient(135deg,#1f2937,#111827);padding:6rem 2rem;text-align:center}.cta-content{max-width:800px;margin:0 auto}.cta-title{font-size:2.5rem;font-weight:800;color:#fff;margin:0 0 1rem}.cta-subtitle{font-size:1.2rem;color:#d1d5db;margin:0 0 2rem}.btn-cta-large{display:inline-flex;align-items:center;gap:.75rem;padding:1.25rem 2.5rem;background:linear-gradient(135deg,#10b981,#059669);border:none;color:#fff;border-radius:12px;font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .3s;box-shadow:0 8px 24px #10b98166}.btn-cta-large:hover{transform:translateY(-4px);box-shadow:0 12px 32px #10b98180}.landing-footer{background:#1f2937;color:#d1d5db;padding:4rem 2rem 2rem}.footer-content{max-width:1400px;margin:0 auto 3rem;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem}.footer-logo{display:flex;flex-direction:column;margin-bottom:.5rem}.footer-tagline{color:#9ca3af;line-height:1.6}.footer-heading{color:#fff;font-size:1.1rem;font-weight:700;margin:0 0 1rem}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:.75rem}.footer-links a{color:#d1d5db;text-decoration:none;transition:color .2s}.footer-links a:hover{color:#fff}.footer-bottom{max-width:1400px;margin:0 auto;padding-top:2rem;border-top:1px solid #374151;text-align:center;color:#9ca3af}@media (max-width: 1024px){.landing-hero{grid-template-columns:1fr;gap:3rem}.landing-hero-visual{order:-1}.stats-grid{grid-template-columns:repeat(2,1fr)}.footer-content{grid-template-columns:1fr 1fr}.module-card{flex:0 0 calc((100% - 2rem)/2)}.modules-slider-container{padding:0 50px}}@media (max-width: 768px){.landing-header-content{padding:.5rem 1rem;min-height:56px}.logo-text-animated{font-size:1.5rem}.logo-text-animated-footer{font-size:1.75rem}.landing-hero{padding:3rem 1rem}.landing-hero-title{font-size:2rem}.landing-hero-subtitle{font-size:1rem}.landing-hero-actions{flex-direction:column}.stats-grid{grid-template-columns:1fr;gap:1.5rem}.features-grid,.footer-content{grid-template-columns:1fr}.btn-login{display:none}.module-card{flex:0 0 calc(100% - 2rem);min-width:280px}.modules-slider-container{padding:0 40px}.slider-nav{width:40px;height:40px;font-size:1.5rem}.slider-nav-left{left:-5px}.slider-nav-right{right:-5px}.interactive-demo{min-height:420px}.demo-content{padding:.75rem}.white-key{width:42px;height:150px}.black-key{width:26px;height:95px}.led-light{width:20px;height:20px}.demo-controls{gap:.5rem}.control-btn{padding:.5rem 1rem;font-size:.85rem}.control-icon{font-size:1rem}}@media (max-width: 480px){.landing-hero-title{font-size:1.75rem}.section-title,.cta-title{font-size:2rem}.landing-header-content{padding:.5rem .75rem;min-height:52px}.logo-text-animated{font-size:1.25rem}.logo-text-animated-footer{font-size:1.5rem}.landing-header-actions{gap:.5rem}.btn-login,.btn-dashboard,.btn-cta-small{padding:.4rem 1rem;font-size:.85rem}.slider-nav{width:36px;height:36px;font-size:1.2rem}.slider-nav-left{left:0}.slider-nav-right{right:0}.modules-slider-container{padding:0 20px}.module-card{flex:0 0 calc(100% - 1rem);min-width:260px}.interactive-demo{min-height:400px}.demo-content{padding:.5rem}.demo-header{font-size:.9rem;margin-bottom:1rem}.demo-subtitle{font-size:.75rem}.led-strip{gap:.4rem;padding:.75rem;margin-bottom:1rem}.led-light{width:16px;height:16px}.piano-keyboard{padding:.5rem;gap:1px;margin-bottom:1rem}.white-key{width:32px;height:120px;padding-bottom:.5rem}.black-key{width:20px;height:75px}.key-label{font-size:.65rem}.demo-controls{gap:.5rem;justify-content:center}.control-btn{padding:.5rem .75rem;font-size:.75rem;gap:.25rem;flex:0 0 auto}.control-icon{font-size:.9rem}@media (max-width: 380px){.control-btn{padding:.625rem;width:44px;height:44px;justify-content:center}.control-btn span:not(.control-icon){display:none}}.demo-instructions{padding:.75rem}.instruction-text{font-size:.8rem}.instruction-icon{font-size:1rem}}.auth-guard-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;padding:1rem;background-color:#f9fafb}.auth-guard-card{background-color:#fff;padding:2rem;border-radius:.5rem;box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d;max-width:28rem;width:100%;text-align:center;font-family:system-ui,-apple-system,sans-serif}.auth-guard-loader{display:flex;align-items:center;justify-content:center;height:100vh}.auth-guard-spinner{height:3rem;width:3rem;border-radius:9999px;border-bottom:2px solid #3b82f6;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.auth-guard-title{font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:#1f2937}.auth-guard-text{color:#4b5563;margin-bottom:1.5rem}.auth-guard-btn{background-color:#2563eb;color:#fff;padding:.5rem 1.5rem;border-radius:.5rem;border:none;cursor:pointer;transition:background-color .2s;font-weight:500}.auth-guard-btn:hover{background-color:#1d4ed8}.auth-guard-container.denied{background-color:#fef2f2}.auth-guard-title.denied{color:#dc2626}.auth-guard-link{color:#2563eb;text-decoration:none;background:none;border:none;cursor:pointer}.auth-guard-link:hover{text-decoration:underline}.skip-to-content{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden;z-index:10000;padding:.75rem 1.5rem;background:#667eea;color:#fff;text-decoration:none;font-weight:600;border-radius:0 0 8px}.skip-to-content:focus{position:fixed;left:0;top:0;width:auto;height:auto;overflow:visible}@keyframes skeleton-pulse{0%{background-position:-200px 0}to{background-position:calc(200px + 100%) 0}}.skeleton-pulse{background:linear-gradient(90deg,#e2e8f0 25%,#f1f5f9 37%,#e2e8f0 63%);background-size:200px 100%;animation:skeleton-pulse 1.4s ease infinite;border-radius:4px}.skeleton-page{padding:2rem;max-width:800px;margin:0 auto}.skeleton-header{height:32px;width:60%;margin-bottom:1.5rem;border-radius:6px}.skeleton-body{display:flex;flex-direction:column;gap:.75rem;margin-bottom:2rem}.skeleton-line{height:14px;border-radius:4px}.skeleton-cards-row{display:flex;gap:1rem}.skeleton-card-block{flex:1;height:120px;border-radius:8px}.skeleton-cards{display:flex;flex-direction:column;gap:1rem}.skeleton-card{display:flex;gap:1rem;padding:1rem;border-radius:8px;background:#fff}.skeleton-card-image{width:80px;height:80px;border-radius:8px;flex-shrink:0}.skeleton-card-content{flex:1;display:flex;flex-direction:column;gap:.5rem;justify-content:center}.skeleton-text-group{display:flex;flex-direction:column;gap:.5rem}.virtualiot-app{display:flex;height:100vh;background:#f8fafc;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow:hidden;color:#1e293b}.app-nav-rail{width:64px;background:#1e293b;display:flex;flex-direction:column;align-items:center;padding:1rem 0;gap:1rem;z-index:100;flex-shrink:0;box-shadow:1px 0 10px #0000001a}.nav-rail-item{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#94a3b8;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);background:transparent;border:none;font-size:1.5rem}.nav-rail-item:hover{color:#f8fafc;background:#ffffff1a;transform:translateY(-2px)}.nav-rail-item.active{color:#fff;background:#3b82f6;box-shadow:0 4px 12px #3b82f666}.nav-rail-spacer{flex:1}.nav-rail-bottom{display:flex;flex-direction:column;align-items:center;gap:1.25rem;padding-bottom:1rem}.icon-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid #e2e8f0;background:#fff;border-radius:6px;cursor:pointer;transition:all .2s;color:#64748b;padding:0;font-size:1.1rem}.icon-btn:hover{border-color:#3b82f6;color:#3b82f6;background:#eff6ff}.icon-btn.active{background:#3b82f6;color:#fff;border-color:#3b82f6}.btn{padding:.5rem 1rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;border:1px solid #e2e8f0;background:#fff;display:flex;align-items:center;gap:.5rem}.btn-primary{background:#3b82f6;color:#fff;border-color:#3b82f6}.btn-primary:hover{background:#2563eb}.resize-handle{position:absolute;top:0;bottom:0;right:-2px;width:4px;cursor:col-resize;z-index:100;transition:background .2s}.resize-handle:hover{background:#3b82f6}.mobile-menu-toggle{display:none;position:fixed;top:1rem;left:1rem;z-index:1001;width:48px;height:48px;background:#1e293b;border:none;border-radius:10px;color:#fff;font-size:1.5rem;cursor:pointer;box-shadow:0 4px 12px #0003;align-items:center;justify-content:center;transition:all .2s ease}.mobile-menu-toggle:hover{background:#334155;transform:scale(1.05)}.mobile-menu-toggle:active{transform:scale(.95)}.nav-drawer-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:99;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease}.nav-drawer-backdrop.visible{opacity:1;visibility:visible}@media (max-width: 640px){.mobile-menu-toggle{display:flex}.app-nav-rail{position:fixed;left:0;top:0;bottom:0;width:280px;transform:translate(-100%);z-index:100;transition:transform .3s cubic-bezier(.4,0,.2,1);box-shadow:4px 0 20px #00000026}.app-nav-rail.drawer-open{transform:translate(0)}.nav-rail-item{width:100%;height:auto;padding:1rem 1.25rem;justify-content:flex-start;gap:1rem;border-radius:0;font-size:1.25rem}.nav-rail-item:after{content:attr(title);font-size:1rem;font-weight:500;white-space:nowrap}.nav-rail-item:hover{transform:none;background:#ffffff26}.nav-rail-item.active{background:#3b82f6;border-radius:0}.nav-rail-bottom{width:100%;padding:1rem 0;border-top:1px solid rgba(255,255,255,.1);margin-top:auto}.nav-rail-bottom .nav-rail-item{padding:.75rem 1.25rem}.navigator-main,.course-container{margin-left:0!important}}@media (min-width: 641px) and (max-width: 768px){.app-nav-rail{width:56px}.nav-rail-item{width:40px;height:40px;font-size:1.25rem}}.view-as-banner{position:fixed;top:0;left:0;right:0;height:40px;background:linear-gradient(90deg,#f59e0b,#d97706);color:#451a03;display:flex;align-items:center;justify-content:center;gap:16px;font-size:.8125rem;font-weight:500;z-index:9999;box-shadow:0 2px 8px #d977064d}.view-as-banner strong{font-weight:700}.view-as-exit{padding:3px 12px;border-radius:6px;border:1px solid rgba(69,26,3,.3);background:#ffffff40;color:#451a03;font-size:.75rem;font-weight:600;cursor:pointer;transition:background .15s}.view-as-exit:hover{background:#ffffff80}.virtualiot-app.theme-dark{background:#0f172a}:root{--color-primary: #2E5BBA;--color-primary-dark: #1E3F7A;--color-secondary: #4A5568;--color-accent: #FF8C00;--color-power: #E53E3E;--color-ground: #1A202C;--color-digital: #4299E1;--color-analog: #48BB78;--color-pwm: #FF8C00;--color-i2c: #9F7AEA;--color-background: #F7FAFC;--color-surface: #FFFFFF;--color-border: #E2E8F0;--color-text: #2D3748;--color-text-muted: #718096;--color-purple-primary: #667eea;--color-purple-dark: #764ba2;--color-purple-accent: #8b5cf6;--color-purple-gradient: linear-gradient(135deg, #667eea, #764ba2);--color-hover: #FBBF24;--color-success: #48BB78;--color-error: #F56565;--color-warning: #ECC94B;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--radius-sm: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--radius-xl: .75rem;--breakpoint-xs: 360px;--breakpoint-sm: 480px;--breakpoint-md: 640px;--breakpoint-lg: 768px;--breakpoint-xl: 900px;--touch-target-min: 48px;--nav-rail-width: 64px;--nav-drawer-width: 280px;--spacing-mobile: 1rem;--spacing-tablet: 1.5rem;--spacing-desktop: 2rem}*{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-family);line-height:1.5;font-weight:400;color:var(--color-text);background-color:var(--color-background);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%;text-size-adjust:100%}body{margin:0;min-height:100vh;font-size:var(--font-size-md)}#root{min-height:100vh;display:flex;flex-direction:column}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.p-sm{padding:var(--spacing-sm)}.p-md{padding:var(--spacing-md)}.p-lg{padding:var(--spacing-lg)}.m-sm{margin:var(--spacing-sm)}.m-md{margin:var(--spacing-md)}.m-lg{margin:var(--spacing-lg)}.text-center{text-align:center}.text-sm{font-size:var(--font-size-sm)}.text-lg{font-size:var(--font-size-lg)}.text-xl{font-size:var(--font-size-xl)}.font-bold{font-weight:600}.rounded{border-radius:var(--radius-md)}.rounded-lg{border-radius:var(--radius-lg)}.shadow{box-shadow:var(--shadow-md)}.border{border:1px solid var(--color-border)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm);font-weight:500;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all .2s ease;text-decoration:none}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--color-secondary);color:#fff}.btn-secondary:hover{background-color:#2d3748}.btn-success{background-color:var(--color-success);color:#fff}.btn-error{background-color:var(--color-error);color:#fff}.input{padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--font-size-md);background:var(--color-surface);color:var(--color-text)}.input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2e5bba1a}.pin-power{color:var(--color-power);background-color:#e53e3e1a}.pin-ground{color:var(--color-ground);background-color:#1a202c1a}.pin-digital{color:var(--color-digital);background-color:#4299e11a}.pin-analog{color:var(--color-analog);background-color:#48bb781a}.pin-pwm{color:var(--color-pwm);background-color:#ff8c001a}.fade-in{animation:fadeIn .3s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.pulse{animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@media (max-width: 640px){.hide-mobile{display:none!important}}.show-mobile{display:none!important}@media (max-width: 640px){.show-mobile{display:block!important}.show-mobile-flex{display:flex!important}}@media (min-width: 641px) and (max-width: 768px){.hide-tablet{display:none!important}}.show-tablet{display:none!important}@media (min-width: 641px) and (max-width: 768px){.show-tablet{display:block!important}.show-tablet-flex{display:flex!important}}@media (max-width: 768px){.btn{padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-xs)}}[dir=rtl]{direction:rtl;text-align:right}[dir=rtl] .app-nav-rail{order:3}[dir=rtl] .app-sidebar{order:2;border-right:none;border-left:1px solid #e2e8f0}[dir=rtl] .app-main{order:1}[dir=rtl] .resize-handle{right:auto;left:-2px}[dir=rtl] .app-toolbar,[dir=rtl] .toolbar-left,[dir=rtl] .toolbar-right{flex-direction:row-reverse}[dir=rtl] .activity-panel{direction:rtl}[dir=rtl] .activity-header{direction:rtl;text-align:right}[dir=rtl] .header-actions-row,[dir=rtl] .header-actions{flex-direction:row-reverse}[dir=rtl] .card-content{direction:rtl}[dir=rtl] .card-header{direction:rtl;text-align:right}[dir=rtl] .card-meta{flex-direction:row-reverse}[dir=rtl] .card-body{direction:rtl;text-align:right}[dir=rtl] .key-points ul,[dir=rtl] .card-steps ol{padding-right:1.5rem;padding-left:0}[dir=rtl] .component-palette{direction:rtl}[dir=rtl] .palette-category{direction:rtl;text-align:right}[dir=rtl] .navigation-controls{flex-direction:row-reverse}[dir=rtl] .nav-btn.prev-btn,[dir=rtl] .nav-btn.next-btn{transform:scaleX(-1)}[dir=rtl] .validation-results{direction:rtl}[dir=rtl] .validation-item{flex-direction:row-reverse}[dir=rtl] .hint-container,[dir=rtl] .hint-message{direction:rtl;text-align:right}[dir=rtl] .code-editor,[dir=rtl] .monaco-editor{direction:ltr!important;text-align:left!important}[dir=rtl] .blockly-workspace,[dir=rtl] .circuit-builder{direction:ltr!important}[dir=rtl] code,[dir=rtl] .pin-reference,[dir=rtl] .component-id,[dir=rtl] .technical-term,[dir=rtl] .number,[dir=rtl] .voltage,[dir=rtl] .resistance,[dir=rtl] .measurement{direction:ltr;display:inline-block}[dir=rtl] .progress-bar{direction:ltr}[dir=rtl] .transition-card{direction:rtl;text-align:right}[dir=rtl] .transition-header{flex-direction:row-reverse}[dir=rtl] .robot-mapping-board{direction:ltr!important}[dir=rtl] .quiz-interface{direction:rtl}[dir=rtl] .quiz-question{text-align:right}[dir=rtl] .quiz-answers,[dir=rtl] .media-board{direction:rtl}[dir=rtl] .media-caption{text-align:right}[dir=rtl] .btn-quit{transform:scaleX(-1)}[dir=rtl] input[type=text],[dir=rtl] textarea{text-align:right}[dir=rtl] [title]{direction:rtl}[dir=rtl] .flex-start{justify-content:flex-end}[dir=rtl] .flex-end{justify-content:flex-start}[dir=rtl] .modal-content,[dir=rtl] .teacher-metadata-view{direction:rtl;text-align:right}[lang=ar]{font-family:Noto Naskh Arabic,Scheherazade,Arial,sans-serif;line-height:1.8}[lang=ar] h1,[lang=ar] h2,[lang=ar] h3,[lang=ar] h4{font-weight:700}[lang=ar] p,[lang=ar] li{letter-spacing:0}[lang=ar] .card-title,[lang=ar] .activity-title{word-break:keep-all;overflow-wrap:break-word}