*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #e51b26;--primary-dark: #c41720;--primary-light: #ff4d56;--secondary: #fffffd;--tertiary: #020002;--accent: #e51b26;--accent-coral: #ff6b6b;--accent-pink: #ff8fa3;--accent-gold: #ffd93d;--accent-cyan: #4ecdc4;--bg-dark: #1a2332;--bg-card: #243447;--bg-card-hover: #2d4158;--bg-elevated: #293d52;--text-primary: #fffffd;--text-secondary: #e0e0e0;--text-muted: #9ca3af;--border: #3a4f66;--border-light: #4a6278;--glow-red: rgba(229, 27, 38, .4);--success: #22c55e;--danger: #e51b26;--code-bg: #151d28}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-dark);color:var(--text-primary);min-height:100vh;overflow-x:hidden}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse at 50% -20%,rgba(44,88,152,.25) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(44,88,152,.15) 0%,transparent 40%),radial-gradient(ellipse at 20% 60%,rgba(78,205,196,.08) 0%,transparent 35%);pointer-events:none;z-index:-1}#root{min-height:100vh}::selection{background:var(--primary);color:#fff}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}code{font-family:Fira Code,Consolas,monospace;background:var(--code-bg);padding:2px 6px;border-radius:4px;font-size:.9em;color:var(--secondary)}.pixel-font{font-family:"Press Start 2P",cursive}.app{min-height:100vh;display:flex;flex-direction:column}.nav{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background:linear-gradient(135deg,#e51b26f2,#c41720e6,#e51b26f2);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:2px solid rgba(255,255,253,.2);box-shadow:0 4px 30px #e51b2666,inset 0 1px #ffffff26;position:sticky;top:0;z-index:100}.nav-logo{display:flex;align-items:center;gap:.75rem;font-weight:700;font-size:1.25rem;color:var(--secondary);text-decoration:none;text-shadow:0 2px 4px rgba(0,0,0,.2)}.nav-logo span:first-child{font-size:1.5rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.nav-logo span:last-child{color:var(--secondary)}.nav-progress{display:flex;align-items:center;gap:1rem}.progress-bar{width:180px;height:8px;background:#fffffd33;border-radius:10px;overflow:hidden;border:none}.progress-fill{height:100%;background:var(--secondary);border-radius:10px;transition:width .5s ease}.xp-badge{display:flex;align-items:center;gap:.5rem;padding:.5rem 1.25rem;background:#fffffd26;border-radius:9999px;font-weight:600;color:var(--secondary);border:1px solid rgba(255,255,253,.25);box-shadow:0 2px 10px #00000026}.main-content{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.card{background:linear-gradient(145deg,var(--bg-card),var(--bg-elevated));border-radius:20px;border:1px solid var(--border);padding:2rem;transition:all .3s ease;box-shadow:0 4px 20px #0003}.card:hover{border-color:var(--primary);box-shadow:0 8px 40px #e51b2633,0 0 0 1px #e51b261a;transform:translateY(-2px)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:12px;font-weight:600;font-size:1rem;cursor:pointer;transition:all .2s ease;border:none;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fffffdf2;box-shadow:0 4px 15px #e51b264d;border:1px solid rgba(255,255,253,.1)}.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 25px #e51b2666;background:linear-gradient(135deg,var(--primary-light),var(--primary));border-color:#fffffd33}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--primary)}.btn-success{background:linear-gradient(135deg,var(--success),#16a34a);color:#fff}.btn-success:hover{transform:translateY(-2px);box-shadow:0 10px 20px #22c55e4d}.btn-large{padding:1rem 2rem;font-size:1.1rem}.code-block{background:var(--code-bg);border-radius:12px;padding:1.5rem;font-family:Fira Code,Consolas,monospace;font-size:.95rem;overflow-x:auto;border:1px solid var(--border)}.code-block .keyword{color:#ff79c6}.code-block .string{color:#f1fa8c}.code-block .function{color:#50fa7b}.code-block .comment{color:#6272a4}.code-block .number{color:#bd93f9}.quiz-option{display:block;width:100%;padding:1rem 1.5rem;margin-bottom:.75rem;background:var(--bg-card);border:2px solid var(--border);border-radius:12px;color:var(--text-primary);font-size:1rem;text-align:left;cursor:pointer;transition:all .2s ease}.quiz-option:hover:not(:disabled){border-color:var(--primary);background:var(--bg-card-hover);transform:translate(4px)}.quiz-option.correct{border-color:var(--success);background:#22c55e1a}.quiz-option.incorrect{border-color:var(--danger);background:#ef44441a}.quiz-option:disabled{cursor:not-allowed;opacity:.7}.data-table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.9rem}.data-table th,.data-table td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--border)}.data-table th{background:var(--bg-dark);color:var(--primary);font-weight:600;text-transform:uppercase;font-size:.8rem;letter-spacing:.05em}.data-table tr:hover td{background:var(--bg-card-hover)}.data-table .highlight{background:#e51b2633}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes shine{0%{background-position:-200% center}to{background-position:200% center}}@keyframes glow{0%,to{box-shadow:0 0 20px #e51b264d}50%{box-shadow:0 0 40px #e51b2680,0 0 60px #ff4d5633}}@keyframes rainbow-border{0%{border-color:var(--primary)}33%{border-color:var(--accent-coral)}66%{border-color:var(--accent-gold)}to{border-color:var(--primary)}}.float{animation:float 3s ease-in-out infinite}.pulse{animation:pulse 2s ease-in-out infinite}.glow{animation:glow 2s ease-in-out infinite}.text-center{text-align:center}.text-left{text-align:left}.text-muted{color:var(--text-secondary)}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.mt-2{margin-top:1rem}.mt-4{margin-top:2rem}.gap-2{gap:1rem}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}