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auto;padding:2rem;text-align:center}.logo{height:6em;padding:1.5em;will-change:filter;transition:filter .3s}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafbaa)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (prefers-reduced-motion: no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{padding:2em}.read-the-docs{color:#888}:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #3b82f6;--secondary: #64748b;--success: #4ecdc4;--success-soft: #a7f3d0;--danger: #ff8a80;--danger-soft: #fecaca;--warning: #fbbf24;--background: #fafbfc;--surface: #ffffff;--surface-elevated: rgba(255, 255, 255, .85);--surface-glass: rgba(255, 255, 255, .75);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--border: #e2e8f0;--border-light: #f1f5f9;--border-glass: rgba(255, 255, 255, .2);--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 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);--gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);--gradient-surface: linear-gradient(135deg, rgba(255, 255, 255, .9) 0%, rgba(255, 255, 255, .8) 100%)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;color:var(--text-primary);background:var(--background);letter-spacing:-.025em}.main-content{margin-top:80px;min-height:calc(100vh - 80px)}.page{display:none}.page.active{display:block}.hidden{display:none!important}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}.alert{padding:1rem;border-radius:.5rem;margin-bottom:1rem}.alert-success{background:#0596691a;color:var(--success);border:1px solid rgba(5,150,105,.2)}.alert-error{background:#dc26261a;color:var(--danger);border:1px solid rgba(220,38,38,.2)}.container{max-width:1200px;margin:0 auto}.section-title{text-align:center;font-size:2rem;font-weight:600;margin-bottom:3.5rem;color:var(--text-primary);letter-spacing:-.05em}@media (max-width: 767px){.backtesting-grid,.parameter-grid{grid-template-columns:1fr}.chart-container{height:300px}}@media (min-width: 768px){.nav-links{display:flex;gap:2rem;list-style:none}.mobile-menu-btn{display:none}.hero{padding:6rem 1rem 5rem}.hero h1,.service-hero h1{font-size:3.5rem}.features-grid,.education-tracks{grid-template-columns:repeat(2,1fr)}.backtesting-grid{grid-template-columns:1fr 2fr}.parameter-grid{grid-template-columns:1fr 1fr}.proof-grid,.pricing-grid{grid-template-columns:repeat(2,1fr)}.dashboard-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.levels-grid{grid-template-columns:repeat(auto-fit,minmax(350px,1fr))}}@media (min-width: 1024px){.features-grid,.education-tracks{grid-template-columns:repeat(3,1fr)}.pricing-grid{grid-template-columns:repeat(4,1fr)}.proof-grid{grid-template-columns:repeat(3,1fr)}.hero h1,.service-hero h1{font-size:4rem}}