:root{--base:#131313;--surface-lowest:#161616;--surface-low:#1a1a1a;--surface:#1e1e1e;--surface-high:#252525;--surface-highest:#2e2e2e;--primary:#4edea3;--primary-container:#10b981;--primary-gradient:linear-gradient(135deg, #4edea3 0%, #10b981 100%);--on-primary:#131313;--on-surface:#e5e2e1;--on-surface-variant:#9ca3af;--outline-variant:rgba(60, 74, 66, 0.2);--r-sm:0.25rem;--r-md:0.375rem;--r-lg:0.75rem;--r-xl:1rem;--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--mono:'SF Mono','Fira Code','Cascadia 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(max-width:768px){h1{font-size:2.2rem}h2{font-size:1.7rem}section{padding:5rem 0}nav ul{position:absolute;top:100%;left:0;right:0;background:rgba(19,19,19,.97);backdrop-filter:blur(20px);flex-direction:column;padding:1.5rem 0;gap:0;display:none}nav ul.open{display:flex}nav ul li{width:100%;text-align:center;padding:.7rem 0}nav .btn{margin:.5rem auto;width:80%}.mobile-menu-btn{display:block}.hero{padding:8.5rem 0 4rem}.faq-grid{grid-template-columns:1fr}.features-grid{grid-template-columns:1fr}.quiz-options{grid-template-columns:1fr}.quiz-container{margin:0 .5rem;padding:1.75rem}.footer-top{grid-template-columns:1fr}}@media (max-width:480px){h1{font-size:1.85rem}h2{font-size:1.45rem}.container{padding:0 1.25rem}.btn{width:100%}.hero-buttons{flex-direction:column}.sec-badges{flex-direction:column}.sec-badge{width:100%}}