@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap";:root{--bg-color:#0f172a;--surface-color:#0f172ab3;--primary-color:#3b82f6;--primary-hover:#2563eb;--secondary-color:#8b5cf6;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent-color:#10b981;--border-color:#ffffff14;--font-family:"Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--shadow-sm:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-md:0 10px 15px -3px #0000004d, 0 4px 6px -2px #00000026;--shadow-lg:0 20px 25px -5px #0006, 0 10px 10px -5px #0003}[data-theme=light]{--bg-color:#f0f4f8;--surface-color:#ffffffd9;--text-primary:#1e293b;--text-secondary:#64748b;--border-color:#0000000d;--shadow-sm:0 4px 6px -1px #0000000d, 0 2px 4px -1px #00000008;--shadow-md:0 10px 25px -5px #00000014, 0 8px 10px -6px #0000000a;--shadow-lg:0 25px 50px -12px 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.2s}.nav-link:hover,.nav-link.active{color:var(--text-primary);background:#ffffff0d}.module-container{margin-top:32px;margin-bottom:64px}.flashcard-container{perspective:1000px;cursor:pointer;width:100%;height:300px}.flashcard-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard-container.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;text-align:center;border:1px solid var(--border-color);border-radius:16px;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;padding:32px;display:flex;position:absolute}.flashcard-front{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#1e293bb3}.flashcard-back{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:linear-gradient(135deg,#3b82f633,#8b5cf633);transform:rotateY(180deg)}@keyframes 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