:root{--bg-primary: #fafbfc;--bg-secondary: #ffffff;--bg-tertiary: #f4f6f8;--bg-elevated: #ffffff;--text-primary: #1a1f36;--text-secondary: #4a5568;--text-tertiary: #718096;--accent-primary: #2563eb;--accent-secondary: #7c3aed;--accent-hover: #1e40af;--border-color: #e2e8f0;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .08);--shadow-xl: 0 20px 60px rgba(0, 0, 0, .12);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);--gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--font-display: "Archivo", sans-serif;--font-body: "DM Sans", sans-serif;--font-mono: "JetBrains Mono", monospace;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--spacing-2xl: 4rem;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-primary: #0f1419;--bg-secondary: #1a202c;--bg-tertiary: #2d3748;--bg-elevated: #1e2530;--text-primary: #f7fafc;--text-secondary: #cbd5e0;--text-tertiary: #a0aec0;--accent-primary: #60a5fa;--accent-secondary: #a78bfa;--accent-hover: #3b82f6;--border-color: #2d3748;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .5);--shadow-xl: 0 20px 60px rgba(0, 0, 0, .6)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-base),color var(--transition-base)}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}.navbar{position:sticky;top:0;z-index:1000;background:var(--bg-elevated);border-bottom:1px solid var(--border-color);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:var(--shadow-sm)}.nav-container{max-width:1200px;margin:0 auto;padding:var(--spacing-md);display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md)}.nav-brand{display:flex;align-items:center;gap:.5rem;font-family:var(--font-display);font-weight:900;font-size:1.25rem;color:var(--text-primary)}.brand-icon{font-size:1.5rem;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.mobile-toggle{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:.5rem}.mobile-toggle span{width:24px;height:2px;background:var(--text-primary);transition:var(--transition-base)}.nav-menu{display:flex;list-style:none;gap:var(--spacing-lg);align-items:center}.nav-menu a{color:var(--text-secondary);text-decoration:none;font-weight:500;font-size:.95rem;transition:color var(--transition-fast);position:relative}.nav-menu a:after{content:"";position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--accent-primary);transition:width var(--transition-base)}.nav-menu a:hover{color:var(--accent-primary)}.nav-menu a:hover:after{width:100%}.theme-toggle{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;width:40px;height:40px;transition:var(--transition-base)}.theme-toggle:hover{background:var(--accent-primary);border-color:var(--accent-primary);transform:scale(1.05)}.theme-toggle .sun-icon,.theme-toggle .moon-icon{font-size:1.2rem;transition:var(--transition-base)}[data-theme=dark] .theme-toggle .sun-icon,[data-theme=light] .theme-toggle .moon-icon{display:none}.hero{padding:var(--spacing-2xl) 0;background:linear-gradient(135deg,var(--bg-secondary) 0%,var(--bg-tertiary) 100%);border-bottom:1px solid var(--border-color);position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 50%,rgba(99,102,241,.05) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(168,85,247,.05) 0%,transparent 50%);pointer-events:none}.hero-content{text-align:center;position:relative;z-index:1;animation:fadeInUp .8s cubic-bezier(.4,0,.2,1)}.hero-title{font-family:var(--font-display);font-size:clamp(2.5rem,8vw,4rem);font-weight:900;line-height:1.1;margin-bottom:var(--spacing-md);letter-spacing:-.02em}.hero-title .highlight{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:block}.hero-subtitle{font-size:1.25rem;color:var(--text-secondary);max-width:700px;margin:0 auto var(--spacing-xl);line-height:1.6}.hero-cta{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}.btn{padding:.875rem 2rem;border-radius:var(--radius-md);font-weight:600;font-size:1rem;text-decoration:none;transition:var(--transition-base);cursor:pointer;border:none;font-family:var(--font-body);display:inline-block}.btn-primary{background:var(--accent-primary);color:#fff;box-shadow:0 4px 12px #2563eb4d}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 20px #2563eb66}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-elevated);border-color:var(--accent-primary);color:var(--accent-primary)}.btn-large{padding:1rem 2.5rem;font-size:1.125rem}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-2xl);max-width:800px;margin-left:auto;margin-right:auto}.stat-card{background:var(--bg-elevated);padding:var(--spacing-lg);border-radius:var(--radius-lg);border:1px solid var(--border-color);text-align:center;transition:var(--transition-base);animation:fadeInUp .8s cubic-bezier(.4,0,.2,1)}.stat-card:nth-child(2){animation-delay:.1s}.stat-card:nth-child(3){animation-delay:.2s}.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--accent-primary)}.stat-number{font-family:var(--font-display);font-size:2.5rem;font-weight:900;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;margin-bottom:.5rem}.stat-label{color:var(--text-secondary);font-size:.95rem;font-weight:500}.demos-section,.learn-section,.about-section,.faq-section{padding:var(--spacing-2xl) 0}.section-title{font-family:var(--font-display);font-size:clamp(2rem,5vw,3rem);font-weight:900;text-align:center;margin-bottom:var(--spacing-md);letter-spacing:-.02em}.section-subtitle{text-align:center;color:var(--text-secondary);max-width:700px;margin:0 auto var(--spacing-xl);font-size:1.125rem}.demo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.demo-card{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:var(--transition-base);cursor:pointer;position:relative;overflow:hidden}.demo-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary);transform:scaleX(0);transition:transform var(--transition-base)}.demo-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--accent-primary)}.demo-card:hover:before{transform:scaleX(1)}.demo-featured{border:2px solid var(--accent-primary);background:linear-gradient(135deg,var(--bg-elevated) 0%,rgba(37,99,235,.02) 100%)}.demo-badge{position:absolute;top:1rem;right:1rem;background:var(--accent-primary);color:#fff;padding:.25rem .75rem;border-radius:var(--radius-sm);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.demo-icon{font-size:3rem;margin-bottom:var(--spacing-md);filter:grayscale(30%);transition:filter var(--transition-base)}.demo-card:hover .demo-icon{filter:grayscale(0%)}.demo-card h3{font-family:var(--font-display);font-size:1.5rem;font-weight:700;margin-bottom:var(--spacing-sm);color:var(--text-primary)}.demo-card p{color:var(--text-secondary);margin-bottom:var(--spacing-md);line-height:1.6}.btn-demo{width:100%;padding:.75rem;background:var(--accent-primary);color:#fff;border:none;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:var(--transition-base);font-family:var(--font-body);font-size:.95rem}.btn-demo:hover{background:var(--accent-hover);transform:translateY(-2px)}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:#000000bf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:2000;align-items:center;justify-content:center;padding:var(--spacing-md);opacity:0;transition:opacity var(--transition-base)}.modal.active{display:flex;opacity:1}.modal-content{background:var(--bg-elevated);border-radius:var(--radius-xl);max-width:900px;width:100%;max-height:90vh;overflow-y:auto;padding:var(--spacing-xl);position:relative;box-shadow:var(--shadow-xl);transform:scale(.9);transition:transform var(--transition-base)}.modal-large{max-width:1100px}.modal.active .modal-content{transform:scale(1)}.modal-close{position:absolute;top:var(--spacing-md);right:var(--spacing-md);background:var(--bg-tertiary);border:none;width:40px;height:40px;border-radius:50%;font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition-base);color:var(--text-primary)}.modal-close:hover{background:var(--accent-primary);color:#fff;transform:rotate(90deg)}.modal-content h2{font-family:var(--font-display);font-size:2rem;font-weight:900;margin-bottom:var(--spacing-sm)}.demo-description{color:var(--text-secondary);margin-bottom:var(--spacing-xl);font-size:1.05rem}.demo-interface{display:grid;gap:var(--spacing-xl)}.upload-area{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:var(--spacing-xl);text-align:center;cursor:pointer;transition:var(--transition-base);background:var(--bg-tertiary)}.upload-area:hover{border-color:var(--accent-primary);background:var(--bg-elevated)}.upload-area.drag-over{border-color:var(--accent-primary);background:#2563eb0d}.upload-placeholder svg{color:var(--text-tertiary);margin-bottom:var(--spacing-md)}.upload-placeholder p{color:var(--text-secondary);font-weight:500}.demo-results{background:var(--bg-tertiary);border-radius:var(--radius-lg);padding:var(--spacing-lg);min-height:200px}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-xl)}.spinner{width:50px;height:50px;border:4px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.results-container{display:grid;gap:var(--spacing-sm)}.result-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background:var(--bg-elevated);border-radius:var(--radius-md);border:1px solid var(--border-color)}.result-label{font-weight:600;color:var(--text-primary)}.result-confidence{display:flex;align-items:center;gap:var(--spacing-sm)}.confidence-bar{width:100px;height:8px;background:var(--border-color);border-radius:4px;overflow:hidden}.confidence-fill{height:100%;background:var(--gradient-primary);transition:width var(--transition-base)}.confidence-value{font-family:var(--font-mono);font-size:.9rem;color:var(--text-secondary);min-width:45px}textarea{width:100%;padding:var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-elevated);color:var(--text-primary);font-family:var(--font-body);font-size:1rem;resize:vertical;transition:var(--transition-base)}textarea:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #2563eb1a}.sentiment-display{display:grid;gap:var(--spacing-lg)}.sentiment-meter{background:var(--bg-elevated);padding:var(--spacing-lg);border-radius:var(--radius-md)}.meter-bar{width:100%;height:12px;background:var(--border-color);border-radius:6px;overflow:hidden;margin-bottom:var(--spacing-md);position:relative}.meter-fill{height:100%;background:linear-gradient(90deg,#ef4444,#fbbf24,#10b981);transition:transform var(--transition-base);transform:translate(-50%)}.meter-labels{display:flex;justify-content:space-between;font-size:.875rem;color:var(--text-tertiary)}.sentiment-score{text-align:center;background:var(--bg-elevated);padding:var(--spacing-lg);border-radius:var(--radius-md)}.score-label{color:var(--text-secondary);margin-bottom:var(--spacing-sm);font-weight:600}.score-value{font-family:var(--font-display);font-size:3rem;font-weight:900;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.detection-controls{display:flex;gap:var(--spacing-md);flex-wrap:wrap}.detection-viewport{position:relative;background:var(--bg-tertiary);border-radius:var(--radius-md);overflow:hidden;min-height:400px;display:flex;align-items:center;justify-content:center}.detection-viewport video,.detection-viewport canvas{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);max-width:100%;max-height:600px;border-radius:var(--radius-md)}.detection-viewport video:not([style*="display: block"]){display:none}.detection-list{display:grid;gap:var(--spacing-sm)}.detection-item{display:flex;justify-content:space-between;padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-elevated);border-radius:var(--radius-sm);border-left:3px solid var(--accent-primary)}.digit-interface{display:grid;grid-template-columns:1fr;gap:var(--spacing-xl)}@media(min-width:768px){.digit-interface{grid-template-columns:auto 1fr}}.canvas-container{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md)}#drawCanvas{border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:crosshair;background:#fff;touch-action:none;max-width:100%;height:auto}.prediction-bars{display:grid;gap:var(--spacing-sm)}.prediction-bar{display:grid;grid-template-columns:40px 1fr 65px;gap:var(--spacing-sm);align-items:center}.prediction-label{font-family:var(--font-mono);font-weight:700;font-size:1.25rem;text-align:center}.prediction-track{height:28px;background:var(--border-color);border-radius:14px;overflow:hidden}.prediction-fill{height:100%;background:var(--gradient-primary);transition:width var(--transition-slow);border-radius:14px}.prediction-value{font-family:var(--font-mono);font-size:.875rem;color:var(--text-secondary);text-align:right;white-space:nowrap;min-width:65px}.llm-loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-2xl);min-height:500px}.loading-spinner-large{width:80px;height:80px;border:6px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:var(--spacing-lg)}.loading-text{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--spacing-md)}.loading-progress{width:100%;max-width:400px;margin-top:var(--spacing-lg)}.progress-bar{width:100%;height:8px;background:var(--border-color);border-radius:4px;overflow:hidden;margin-bottom:var(--spacing-sm)}.progress-fill{height:100%;background:var(--gradient-primary);transition:width var(--transition-base)}.progress-text{text-align:center;font-family:var(--font-mono);color:var(--text-secondary);font-size:.875rem}.loading-note{color:var(--text-tertiary);font-size:.9rem;margin-top:var(--spacing-md);text-align:center}.llm-chat-interface{display:flex;flex-direction:column;height:600px}.chat-messages{flex:1;overflow-y:auto;padding:var(--spacing-md);background:var(--bg-tertiary);border-radius:var(--radius-md);margin-bottom:var(--spacing-md)}.chat-message{display:flex;gap:var(--spacing-md);margin-bottom:var(--spacing-md);animation:fadeInUp .3s ease}.user-message{flex-direction:row-reverse}.message-avatar{width:40px;height:40px;border-radius:50%;background:var(--accent-primary);display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0}.user-message .message-avatar{background:var(--accent-secondary)}.message-content{background:var(--bg-elevated);padding:var(--spacing-md);border-radius:var(--radius-md);max-width:70%;border:1px solid var(--border-color)}.user-message .message-content{background:var(--accent-primary);color:#fff}.message-content p{margin:0;line-height:1.6}.chat-input-container{display:flex;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.chat-input-container textarea{flex:1}.chat-input-container .btn{align-self:flex-end;padding:.875rem 1.5rem}.send-icon{font-size:1.25rem}.chat-controls{display:flex;justify-content:space-between;align-items:center}.model-info{font-family:var(--font-mono);font-size:.875rem;color:var(--text-tertiary)}.voice-controls{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}.mic-icon,.stop-icon{font-size:1.5rem;margin-right:var(--spacing-xs)}.recording-indicator{display:flex;align-items:center;justify-content:center;gap:var(--spacing-md);padding:var(--spacing-md);background:#ef44441a;border:2px solid #ef4444;border-radius:var(--radius-md);color:#ef4444;font-weight:600;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.pulse-dot{width:12px;height:12px;background:#ef4444;border-radius:50%;animation:pulse-dot 1.5s ease-in-out infinite}@keyframes pulse-dot{0%,to{transform:scale(1)}50%{transform:scale(1.3)}}.audio-visualizer{background:var(--bg-tertiary);border-radius:var(--radius-md);padding:var(--spacing-md);display:flex;justify-content:center}#visualizerCanvas{max-width:100%;height:auto}.emotion-results{min-height:250px;display:flex;align-items:center;justify-content:center}.result-placeholder{text-align:center;color:var(--text-secondary)}.emotion-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background:var(--bg-elevated);border-radius:var(--radius-md);margin-bottom:var(--spacing-sm);border-left:4px solid var(--accent-primary)}.emotion-name{font-weight:600;font-size:1.125rem}.emotion-confidence{font-family:var(--font-mono);color:var(--accent-primary)}.privacy-notice{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:#2563eb0d;border:1px solid var(--accent-primary);border-radius:var(--radius-md);margin-top:var(--spacing-md)}.privacy-icon{font-size:1.5rem}.privacy-notice p{margin:0;color:var(--text-secondary);font-size:.9rem}.learn-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-xl)}.learn-card{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:var(--transition-base)}.learn-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--accent-primary)}.learn-icon{font-size:2.5rem;margin-bottom:var(--spacing-md)}.learn-card h3{font-family:var(--font-display);font-size:1.25rem;font-weight:700;margin-bottom:var(--spacing-sm)}.learn-card p{color:var(--text-secondary);line-height:1.7}.about-section{background:var(--bg-secondary);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.about-content{max-width:800px;margin:0 auto}.about-content p{color:var(--text-secondary);font-size:1.125rem;line-height:1.8;margin-bottom:var(--spacing-xl)}.tech-stack,.features-list{margin-top:var(--spacing-xl)}.tech-stack h3,.features-list h3{font-family:var(--font-display);font-size:1.5rem;font-weight:700;margin-bottom:var(--spacing-md)}.tech-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-sm)}.tech-tag{padding:.5rem 1rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);font-family:var(--font-mono);font-size:.875rem;color:var(--text-primary);transition:var(--transition-base)}.tech-tag:hover{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary)}.features-list ul{list-style:none;display:grid;gap:var(--spacing-sm)}.features-list li{padding:var(--spacing-sm);color:var(--text-secondary);font-size:1.05rem}.faq-list{max-width:800px;margin:var(--spacing-xl) auto 0;display:grid;gap:var(--spacing-md)}.faq-item{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:var(--transition-base)}.faq-item:hover{border-color:var(--accent-primary)}.faq-question{width:100%;padding:var(--spacing-md) var(--spacing-lg);background:none;border:none;text-align:left;font-size:1.05rem;font-weight:600;color:var(--text-primary);cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--font-body)}.faq-icon{font-size:1.5rem;transition:transform var(--transition-base);color:var(--accent-primary)}.faq-question[aria-expanded=true] .faq-icon{transform:rotate(45deg)}.faq-answer{max-height:0;overflow:hidden;transition:max-height var(--transition-slow)}.faq-answer p{padding:0 var(--spacing-lg) var(--spacing-lg);color:var(--text-secondary);line-height:1.7}.faq-question[aria-expanded=true]+.faq-answer{max-height:500px}.footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:var(--spacing-xl) 0}.footer-content{display:grid;gap:var(--spacing-lg);text-align:center}.footer-brand{display:flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--font-display);font-weight:900;font-size:1.25rem}.footer-links{display:flex;gap:var(--spacing-lg);justify-content:center;flex-wrap:wrap}.footer-links a{color:var(--text-secondary);text-decoration:none;transition:color var(--transition-fast)}.footer-links a:hover{color:var(--accent-primary)}.footer-info{color:var(--text-tertiary);font-size:.875rem}.footer-info p{margin:.25rem 0}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media(max-width:768px){.mobile-toggle{display:flex}.nav-menu{position:absolute;top:100%;left:0;right:0;background:var(--bg-elevated);flex-direction:column;padding:var(--spacing-md);border-bottom:1px solid var(--border-color);transform:translateY(-100%);opacity:0;pointer-events:none;transition:var(--transition-base);box-shadow:var(--shadow-md)}.nav-menu.active{transform:translateY(0);opacity:1;pointer-events:all}.hero{padding:var(--spacing-xl) 0}.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1.125rem}.hero-cta{flex-direction:column}.btn{width:100%}.demo-grid,.learn-grid{grid-template-columns:1fr}.modal-content{padding:var(--spacing-lg);max-height:95vh}.demo-interface{gap:var(--spacing-lg)}.detection-controls{flex-direction:column}.detection-controls .btn{width:100%}#drawCanvas{width:100%;height:auto}.digit-interface{grid-template-columns:1fr}.prediction-bar{grid-template-columns:35px 1fr 60px}.llm-chat-interface{height:500px}.message-content{max-width:85%}}@media(max-width:480px){:root{--spacing-xl: 2rem;--spacing-2xl: 3rem}.section-title{font-size:2rem}.modal-content h2{font-size:1.5rem}.stat-number{font-size:2rem}.prediction-bar{grid-template-columns:30px 1fr 55px}.prediction-label{font-size:1rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}*:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}button:focus-visible,a:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}