@import"https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap";:root{--void: #0a0a0f;--abyss: #0d0d14;--deep: #12121a;--surface: #1a1a24;--elevated: #22222e;--muted: #2a2a38;--accent: #00f5d4;--accent-dim: #00c4aa;--accent-glow: rgba(0, 245, 212, .4);--accent-subtle: rgba(0, 245, 212, .1);--secondary: #ff6b9d;--secondary-glow: rgba(255, 107, 157, .4);--tertiary: #9d4edd;--tertiary-glow: rgba(157, 78, 221, .4);--text-primary: #f0f0f5;--text-secondary: #a0a0b0;--text-muted: #606070;--success: #00f5a0;--success-glow: rgba(0, 245, 160, .3);--error: #ff4757;--error-glow: rgba(255, 71, 87, .3);--warning: #ffa502}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Outfit,-apple-system,sans-serif;background:var(--void);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}.neural-bg{position:fixed;top:0;right:0;bottom:0;left:0;z-index:0;overflow:hidden;pointer-events:none}.neural-bg:before{content:"";position:absolute;top:-50%;right:-50%;bottom:-50%;left:-50%;background:radial-gradient(ellipse 80% 50% at 20% 40%,rgba(0,245,212,.08) 0%,transparent 50%),radial-gradient(ellipse 60% 40% at 80% 60%,rgba(157,78,221,.06) 0%,transparent 50%),radial-gradient(ellipse 50% 30% at 50% 80%,rgba(255,107,157,.05) 0%,transparent 50%);animation:nebula 20s ease-in-out infinite alternate}@keyframes nebula{0%{transform:translate(0) rotate(0)}to{transform:translate(-5%,5%) rotate(3deg)}}.grid-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1;background-image:linear-gradient(rgba(0,245,212,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,245,212,.03) 1px,transparent 1px);background-size:60px 60px;-webkit-mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black 20%,transparent 70%);mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black 20%,transparent 70%);pointer-events:none}.particles{position:fixed;top:0;right:0;bottom:0;left:0;z-index:2;pointer-events:none;overflow:hidden}.particle{position:absolute;width:4px;height:4px;background:var(--accent);border-radius:50%;opacity:0;animation:float-particle 15s infinite}.particle:nth-child(1){left:10%;animation-delay:0s}.particle:nth-child(2){left:20%;animation-delay:2s}.particle:nth-child(3){left:30%;animation-delay:4s}.particle:nth-child(4){left:40%;animation-delay:6s}.particle:nth-child(5){left:50%;animation-delay:8s}.particle:nth-child(6){left:60%;animation-delay:10s}.particle:nth-child(7){left:70%;animation-delay:1s}.particle:nth-child(8){left:80%;animation-delay:3s}.particle:nth-child(9){left:90%;animation-delay:5s}@keyframes float-particle{0%{transform:translateY(100vh) scale(0);opacity:0}10%{opacity:.6;transform:translateY(80vh) scale(1)}90%{opacity:.3}to{transform:translateY(-20vh) scale(.5);opacity:0}}#root{position:relative;z-index:10;min-height:100vh}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--abyss)}::-webkit-scrollbar-thumb{background:var(--muted);border-radius:4px;transition:background .2s}::-webkit-scrollbar-thumb:hover{background:var(--accent-dim)}::selection{background:var(--accent);color:var(--void)}.glow-text{text-shadow:0 0 10px var(--accent-glow),0 0 20px var(--accent-glow),0 0 40px var(--accent-glow)}.glow-text-secondary{text-shadow:0 0 10px var(--secondary-glow),0 0 20px var(--secondary-glow)}.glass-card{background:linear-gradient(135deg,#1a1a24e6,#12121af2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid rgba(0,245,212,.1);box-shadow:0 4px 24px #0006,0 0 0 1px #ffffff08 inset,0 1px #ffffff0d inset}.glass-card-elevated{background:linear-gradient(135deg,#22222ef2,#1a1a24fa);-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);border:1px solid rgba(0,245,212,.15);box-shadow:0 8px 32px #00000080,0 0 0 1px #ffffff0a inset}.border-glow{position:relative}.border-glow:before{content:"";position:absolute;top:-2px;right:-2px;bottom:-2px;left:-2px;background:linear-gradient(45deg,var(--accent),var(--tertiary),var(--secondary),var(--accent));background-size:400% 400%;border-radius:inherit;z-index:-1;animation:gradient-rotate 8s linear infinite;opacity:0;transition:opacity .3s ease}.border-glow:hover:before,.border-glow:focus-within:before{opacity:1}.border-glow:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:inherit;border-radius:inherit;z-index:-1}@keyframes gradient-rotate{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.btn-primary{background:linear-gradient(135deg,var(--accent) 0%,var(--accent-dim) 100%);color:var(--void);font-weight:600;padding:1rem 2rem;border-radius:12px;border:none;cursor:pointer;position:relative;overflow:hidden;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 16px var(--accent-glow),0 0 0 0 var(--accent)}.btn-primary:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,rgba(255,255,255,.2) 0%,transparent 50%);opacity:0;transition:opacity .3s}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px var(--accent-glow),0 0 0 4px #00f5d433}.btn-primary:hover:before{opacity:1}.btn-primary:active{transform:translateY(0) scale(.98)}.btn-secondary{background:transparent;color:var(--text-secondary);font-weight:500;padding:1rem 1.5rem;border-radius:12px;border:1px solid var(--muted);cursor:pointer;transition:all .3s ease}.btn-secondary:hover:not(:disabled){color:var(--accent);border-color:var(--accent);background:var(--accent-subtle)}.btn-secondary:disabled{opacity:.3;cursor:not-allowed}.option-card{background:var(--surface);border:2px solid var(--muted);border-radius:16px;padding:1.25rem;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.option-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,var(--accent-subtle) 0%,transparent 60%);opacity:0;transition:opacity .3s}.option-card:hover{border-color:#00f5d466;transform:translate(4px);background:var(--elevated)}.option-card:hover:before{opacity:1}.option-card.selected{border-color:var(--accent);background:linear-gradient(135deg,rgba(0,245,212,.1) 0%,var(--surface) 100%);box-shadow:0 0 0 1px var(--accent),0 4px 24px var(--accent-glow)}.option-card.selected:before{opacity:1}.option-badge{width:2.5rem;height:2.5rem;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1rem;background:var(--muted);color:var(--text-secondary);transition:all .3s ease;flex-shrink:0}.option-card:hover .option-badge{background:#00f5d433;color:var(--accent)}.option-card.selected .option-badge{background:var(--accent);color:var(--void);box-shadow:0 0 16px var(--accent-glow)}.progress-track{height:6px;background:var(--muted);border-radius:3px;overflow:hidden;position:relative}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-dim) 0%,var(--accent) 100%);border-radius:3px;transition:width .5s cubic-bezier(.4,0,.2,1);position:relative;box-shadow:0 0 12px var(--accent-glow)}.progress-fill:after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);width:12px;height:12px;background:var(--accent);border-radius:50%;box-shadow:0 0 16px var(--accent-glow)}.timer{font-family:JetBrains Mono,monospace;font-weight:600;padding:.5rem 1rem;border-radius:10px;display:flex;align-items:center;gap:.5rem;transition:all .3s ease}.timer.normal{background:var(--surface);color:var(--text-primary);border:1px solid var(--muted)}.timer.warning{background:#ff47571a;color:var(--error);border:1px solid rgba(255,71,87,.3);animation:pulse-warning 2s ease-in-out infinite}@keyframes pulse-warning{0%,to{box-shadow:0 0 0 0 var(--error-glow)}50%{box-shadow:0 0 20px var(--error-glow)}}.stat-card{background:var(--surface);border:1px solid var(--muted);border-radius:16px;padding:1.5rem;transition:all .3s ease;position:relative;overflow:hidden}.stat-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--tertiary))}.stat-card:hover{border-color:#00f5d44d;transform:translateY(-4px);box-shadow:0 12px 40px #0006}.result-card{border-radius:20px;padding:1.5rem;transition:all .3s ease}.result-card.correct{background:linear-gradient(135deg,rgba(0,245,160,.08) 0%,var(--surface) 100%);border:1px solid rgba(0,245,160,.2)}.result-card.incorrect{background:linear-gradient(135deg,rgba(255,71,87,.08) 0%,var(--surface) 100%);border:1px solid rgba(255,71,87,.2)}.score-ring{width:200px;height:200px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--score) * 3.6deg),var(--muted) calc(var(--score) * 3.6deg));display:flex;align-items:center;justify-content:center;position:relative;box-shadow:0 0 60px var(--accent-glow),inset 0 0 40px #00000080}.score-ring:before{content:"";position:absolute;top:12px;right:12px;bottom:12px;left:12px;background:var(--deep);border-radius:50%}.score-ring .score-inner{position:relative;z-index:1;text-align:center}.quiz-header{background:linear-gradient(180deg,var(--abyss) 0%,transparent 100%);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,245,212,.1)}.quiz-footer{background:linear-gradient(0deg,var(--abyss) 0%,rgba(10,10,15,.95) 100%);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-top:1px solid rgba(0,245,212,.1)}@keyframes fade-in-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes scale-in{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@keyframes slide-in-right{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.animate-fade-in-up{animation:fade-in-up .6s cubic-bezier(.4,0,.2,1) forwards}.animate-fade-in{animation:fade-in .4s ease forwards}.animate-scale-in{animation:scale-in .5s cubic-bezier(.4,0,.2,1) forwards}.animate-slide-in{animation:slide-in-right .5s cubic-bezier(.4,0,.2,1) forwards}.stagger-children>*:nth-child(1){animation-delay:.05s}.stagger-children>*:nth-child(2){animation-delay:.1s}.stagger-children>*:nth-child(3){animation-delay:.15s}.stagger-children>*:nth-child(4){animation-delay:.2s}.stagger-children>*:nth-child(5){animation-delay:.25s}.ai-box{background:linear-gradient(135deg,rgba(157,78,221,.1) 0%,var(--surface) 100%);border:1px solid rgba(157,78,221,.3);border-radius:16px;position:relative;overflow:hidden}.ai-box:before{content:"";position:absolute;top:0;left:-100%;width:200%;height:100%;background:linear-gradient(90deg,transparent,rgba(157,78,221,.1),transparent);animation:shimmer 3s infinite}.font-mono{font-family:JetBrains Mono,monospace}button:focus-visible,.option-card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.safe-area-bottom{padding-bottom:max(1rem,env(safe-area-inset-bottom))}@media(max-width:640px){.score-ring{width:160px;height:160px}.stat-card{padding:1rem}}