:root{--columbia-blue: #B9D6F2;--bice-blue: #006DAA;--sapphire: #0353A4;--prussian-blue: #003559;--oxford-blue: #061A40;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--success: #10b981;--success-light: #d1fae5;--error: #ef4444;--error-light: #fef2f2;--warning: #f59e0b;--warning-light: #fef3c7}@font-face{font-family:Overused Grotesk;src:url(../assets/font/fonts/OverusedGrotesk-Light.woff2) format("woff2"),url(../assets/font/fonts/OverusedGrotesk-Light.woff) format("woff");font-weight:300;font-style:normal;font-display:swap}@font-face{font-family:Overused Grotesk;src:url(../assets/font/fonts/OverusedGrotesk-Roman.woff2) format("woff2"),url(../assets/font/fonts/OverusedGrotesk-Roman.woff) format("woff");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Overused Grotesk;src:url(../assets/font/fonts/OverusedGrotesk-Medium.woff2) format("woff2"),url(../assets/font/fonts/OverusedGrotesk-Medium.woff) format("woff");font-weight:500;font-style:normal;font-display:swap}@font-face{font-family:Overused Grotesk;src:url(../assets/font/fonts/OverusedGrotesk-SemiBold.woff2) format("woff2"),url(../assets/font/fonts/OverusedGrotesk-SemiBold.woff) format("woff");font-weight:600;font-style:normal;font-display:swap}@font-face{font-family:Overused Grotesk;src:url(../assets/font/fonts/OverusedGrotesk-Bold.woff2) format("woff2"),url(../assets/font/fonts/OverusedGrotesk-Bold.woff) format("woff");font-weight:700;font-style:normal;font-display:swap}.cta-button{background:#1e40af;color:#fff;padding:.75rem 1.5rem;border:none;border-radius:16px;text-decoration:none;font-weight:600;transition:background-color .3s,transform .2s;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe 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ease-in}.logo{display:flex;align-items:center;gap:.2rem;font-size:1.2rem;font-weight:700;color:var(--sapphire)}.logo-complete{height:1.5em;width:auto;min-width:125px;max-width:225px;opacity:.85}.hero-text-line{opacity:0;transform:translateY(20px);filter:blur(6px);will-change:opacity,transform,filter;font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif}.hero-text-line-1{animation:hero-entrance .6s ease-out 0ms forwards}.hero-text-line-2{animation:hero-entrance .6s ease-out .3s forwards}@keyframes hero-entrance{0%{opacity:0;transform:translateY(20px);filter:blur(6px)}to{opacity:1;transform:translateY(0);filter:blur(0)}}.auth-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#061a40d9;display:flex;align-items:center;justify-content:center;z-index:1000;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.auth-modal{background:#fff;border-radius:12px;width:90%;max-width:420px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;position:relative;font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif}.auth-modal-header{display:flex;justify-content:flex-end;padding:16px 20px 0}.auth-modal-close{background:none;border:none;font-size:24px;color:var(--gray-500);cursor:pointer;padding:0;width:30px;height:30px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s ease}.auth-modal-close:hover{background:var(--gray-100);color:var(--gray-700)}.auth-modal-content{padding:0 32px 32px}.auth-tabs{display:flex;border-bottom:1px solid var(--gray-200);margin-bottom:24px}.auth-tab{background:none;border:none;padding:12px 16px;font-size:16px;font-weight:500;color:var(--gray-500);cursor:pointer;border-bottom:2px solid transparent;transition:all .2s ease;flex:1;font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif}.auth-tab.active{color:var(--sapphire);border-bottom-color:var(--sapphire)}.auth-tab:hover:not(.active){color:var(--gray-700)}.auth-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:14px;font-weight:500;color:var(--gray-700);font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif}.form-group input{padding:12px 16px;border:1px solid var(--gray-300);border-radius:8px;font-size:16px;transition:border-color .2s ease,box-shadow .2s ease;background:#fff;font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif}.form-group input:focus{outline:none;border-color:var(--sapphire);box-shadow:0 0 0 3px #0553a41a}.form-group input.error{border-color:var(--error)}.form-group input.error:focus{border-color:var(--error);box-shadow:0 0 0 3px #ef44441a}.error-message{color:var(--error);font-size:14px;margin-top:4px}.submit-error{text-align:center;font-weight:500;padding:12px;background:var(--error-light);border:1px solid #fecaca;border-radius:8px;margin-top:8px;color:var(--error)}.auth-submit-btn{background:var(--sapphire);color:#fff;border:none;padding:14px 24px;border-radius:8px;font-size:16px;font-weight:500;cursor:pointer;transition:background-color .2s ease;margin-top:8px;font-family:Overused Grotesk,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica 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ease}.auth-button:hover{background:var(--bice-blue)}.auth-button:active{background:var(--prussian-blue)}.auth-button.secondary{background:transparent;color:var(--gray-500);border:1px solid var(--gray-300)}.auth-button.secondary:hover{background:var(--gray-50);color:var(--gray-700)}.page-container{display:flex;height:calc(100vh - 60px);width:100%;position:relative;top:0;transition:top .3s ease-in-out,height .3s ease-in-out}.chat-area{width:50%;min-width:350px;max-width:1000px;flex-shrink:0;display:flex;flex-direction:column;height:100%;border-right:1px solid var(--gray-200);background:#fff}.chat-log{flex-grow:1;overflow-y:auto;padding:2rem 2.5rem 0;display:flex;flex-direction:column;-ms-overflow-style:none;scrollbar-width:none}.chat-log::-webkit-scrollbar{display:none}.resizer{width:2px;cursor:col-resize;background-color:var(--gray-50);z-index:10;transition:background-color .2s 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transparent;box-shadow:none}.annotation-toggle-btn{width:36px;height:36px;border:none;border-radius:18px;background-color:#f3f4f6;color:#6b7280;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;font-size:14px}.annotation-toggle-btn:hover{background-color:#e5e7eb;color:#374151}.annotation-toggle-btn.active{background-color:#3b82f6;color:#fff}.annotation-toggle-btn.active:hover{background-color:#2563eb}.annotation-toggle-btn.active:active{background-color:#1d4ed8}.debug-button{width:36px;height:36px;border:none;border-radius:18px;background-color:#f3f4f6;color:#6b7280;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s cubic-bezier(.4,0,.2,1);font-size:.9rem}.debug-button:hover{background-color:#e5e7eb;color:#374151}.debug-button:active{background-color:#d1d5db;color:#1f2937}.discussion-content{flex-grow:1;overflow-y:auto;padding:1rem .5rem;display:flex;flex-direction:column;position:relative;-ms-overflow-style:none;scrollbar-width:none}.discussion-content .spacer{height:150px;width:100%;flex-shrink:0;pointer-events:none}.discussion-content::-webkit-scrollbar{display:none}.message{display:flex;flex-direction:column;max-width:95%}.message+.message{margin-top:2rem}.message.ai+.message.ai{margin-top:.5rem}.message-sender{font-size:.8rem;font-weight:600;color:#555;margin-bottom:4px;margin-left:5px}.message.user{align-self:flex-end;align-items:flex-end;margin-right:8px}.message.ai{align-self:flex-start;align-items:flex-start;margin-left:8px}.message-bubble{padding:10px 14px;border-radius:16px 16px 0;width:fit-content;max-width:100%;word-wrap:break-word}.ai .ai-message-content{padding:4px 0;width:100%;color:#333;line-height:1.5}.user .message-bubble{background-color:var(--sapphire);color:#fff;position:relative;overflow:hidden;display:flex;align-items:center}.message-bubble.correct{animation:bubble-glow .8s ease-out;position:relative;display:flex;align-items:center}.checkmark-icon{width:22px;height:22px;background-color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-left:8px;flex-shrink:0;opacity:0;transform:translate(150%);box-shadow:0 0 2px #0000001a;cursor:default}.message-bubble.correct .checkmark-icon{animation:slide-in-check .4s ease-out .2s forwards}.checkmark-icon svg{width:14px;height:14px;stroke:#28a745;stroke-width:2.5;fill:none}@keyframes slide-in-check{to{opacity:1;transform:translate(0)}}.mode-indicator{position:relative;background:linear-gradient(135deg,var(--sapphire) 0%,var(--bice-blue) 100%);color:#fff;padding:.75rem 1.25rem;margin:-1rem -1rem 1rem;border-radius:.75rem .75rem 0 0;opacity:0;transform:translateY(-10px);transition:all .3s ease}.mode-indicator.visible{opacity:1;transform:translateY(0)}.mode-indicator-content{display:flex;align-items:center;gap:.75rem;font-size:.875rem;font-weight:500}.mode-indicator svg{width:1.25rem;height:1.25rem;stroke-width:2.5}.socratic-mode~.spacer~#hybrid-editor{border-color:var(--sapphire)}.socratic-mode~.spacer~#hybrid-editor:focus{box-shadow:0 0 0 3px #0553a41a}@keyframes geogebra-highlight{0%{opacity:.3}50%{opacity:1}to{opacity:.3}}.highlighted-object{animation:geogebra-highlight 2s ease-in-out infinite}.socratic-mode-toggle{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#fff;border:1px solid var(--gray-200);border-radius:.5rem;font-size:.875rem;font-weight:500;color:var(--gray-700);cursor:pointer;transition:all .2s ease}.socratic-mode-toggle:hover{background:var(--gray-50);border-color:var(--sapphire);color:var(--sapphire)}.socratic-mode-toggle.active{background:var(--sapphire);border-color:var(--sapphire);color:#fff}.socratic-mode-toggle svg{width:1.125rem;height:1.125rem}@keyframes bubble-glow{0%,to{box-shadow:none}50%{box-shadow:0 0 12px 4px #28a7454d}}.typing-indicator{display:flex;align-items:center;padding:8px 12px;margin-top:1rem;margin-bottom:1rem}.typing-indicator span{height:8px;width:8px;background-color:#9e9e9e;border-radius:50%;display:inline-block;margin:0 2px;animation:bounce 1.4s infinite ease-in-out both}.typing-indicator span:nth-of-type(2){animation-delay:.2s}.typing-indicator span:nth-of-type(3){animation-delay:.4s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.top-bar{background:#fff;border-bottom:1px solid var(--gray-200);padding:12px 24px 12px 84px;display:flex;align-items:center;height:60px;position:sticky;top:0;z-index:200;width:100%;box-sizing:border-box;transition:padding-left .3s ease}.logo{font-size:24px;font-weight:700;color:var(--oxford-blue);cursor:pointer;transition:color .2s ease;display:flex;align-items:center;gap:6px}.logo:hover{color:var(--sapphire)}.logo span{color:var(--sapphire)!important;transition:color .2s ease}.logo:hover span{color:var(--bice-blue)!important}.logo-icon{width:32px;height:32px;flex-shrink:0;transform:translateY(-1px);filter:brightness(0)}.classroom-page .logo-icon{transform:translateY(1px)}.classroom-info{display:flex;align-items:center;gap:32px;position:absolute;left:50%;transform:translate(-50%)}.classroom-label{font-size:16px;font-weight:600;color:var(--gray-700)}#toggle-problem-btn{display:flex;align-items:center;gap:8px;font-size:16px;color:var(--gray-500);background:none;border:none;cursor:pointer;padding:8px 12px;border-radius:6px;transition:background-color .2s}#toggle-problem-btn:hover{background-color:var(--gray-100)}#toggle-problem-btn .chevron{width:16px;height:16px;transition:transform .3s ease-in-out}#toggle-problem-btn.expanded .chevron{transform:rotate(180deg)}#toggle-problem-btn.collapsed .chevron{transform:rotate(0)}@keyframes glow-pulse{0%{box-shadow:0 0 #216fdb4d}50%{box-shadow:0 0 0 4px #216fdb80}to{box-shadow:0 0 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.tl-canvas{background:transparent!important}#tldraw-overlay.active{pointer-events:auto}#problem-container.expanded::-webkit-scrollbar{width:6px}#problem-container.expanded::-webkit-scrollbar-track{background:#f1f5f9;border-radius:3px}#problem-container.expanded::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}#problem-container.expanded::-webkit-scrollbar-thumb:hover{background:#94a3b8}.problem-card{background:#fff;border:none;border-radius:0;padding:0;margin:0;box-shadow:none;max-width:100%;box-sizing:border-box}.problem-header{padding:16px 20px 8px;width:100%;max-width:1200px;margin:0 auto;border-bottom:1px solid var(--gray-200)}.problem-card-title{font-size:1.125rem;font-weight:700;color:var(--prussian-blue);margin:0}.problem-content{display:grid;grid-template-columns:1fr auto;gap:0;align-items:start;width:100%}.problem-card-body{display:flex;flex-direction:column;gap:0;margin:0;padding:0}.problem-card-body:has(.problem-diagram-container:empty),.problem-card-body:has(#problem-diagram:empty){grid-template-columns:1fr}.problem-diagram-container:empty,.problem-diagram-container:has(#problem-diagram:empty){display:none!important;width:0;padding:0;margin:0}.problem-text-and-choices{font-size:1rem;line-height:1.6;color:var(--gray-700);width:100%;margin:0;padding:16px 20px}#problem-text,#problem-text p,#problem-text div,#problem-text span{margin:0;padding:0}#problem-text a,.problem-tooltip a,.problem-card a{color:#2563eb;text-decoration:none;border-bottom:1px solid #2563eb;transition:all .2s ease}#problem-text a:hover,.problem-tooltip a:hover,.problem-card a:hover{color:#1d4ed8;border-bottom-color:#1d4ed8;background-color:#2563eb0d}#problem-text a[href^=http],.problem-tooltip a[href^=http],.problem-card a[href^=http]{cursor:pointer}.problem-diagram-container{display:flex;align-items:center;justify-content:center;min-width:200px}.problem-diagram-container:empty{display:none}#problem-diagram img{max-width:100%;border-radius:8px;border:1px solid #e5e7eb}#problem-choices-list{list-style-type:none;padding:0 20px 16px;margin:12px 0 0;counter-reset:choice-counter;display:flex;flex-wrap:wrap;gap:8px 16px}#problem-choices-list li{display:flex;align-items:baseline;counter-increment:choice-counter;margin:4px 0;white-space:nowrap}#problem-choices-list li:before{content:counter(choice-counter,upper-alpha) ".";font-weight:600;color:#4b5563;min-width:20px;margin-right:4px;flex-shrink:0}mjx-container{margin-left:.25em;margin-right:.25em}.choice-item mjx-container:first-of-type{margin-left:.3em}.choice-item mjx-container{display:inline-block;vertical-align:baseline}#problem-choices-list li.choice-item{white-space:normal;flex-wrap:wrap}.choice-item>*:not(:first-child){margin-left:.25em}.canvas-container{flex:1;padding:0;margin:0;display:flex;flex-direction:column;min-height:0;overflow:hidden;width:100%;min-height:400px}.canvas{width:100%;height:100%;max-width:100%;max-height:100%;border:none;border-radius:0;background:#fff;box-sizing:border-box;margin:0;padding:0}#ggb-element{width:100%;height:100%;max-width:100%;max-height:100%;border:none;border-radius:0;box-sizing:border-box;overflow:visible;min-height:400px;flex:1}#ggb-element>div,#ggb-element iframe,#ggb-element canvas{width:100%!important;height:100%!important;max-width:none!important;max-height:none!important}#ggb-element .applet_scaler{width:100%!important;height:100%!important;transform:none!important;max-width:none!important;max-height:none!important}#ggb-element .applet_scaler>div,#ggb-element .applet_scaler iframe{width:100%!important;height:100%!important}@media (max-width: 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