*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-warm: #f0f4ff;--bg-card: #ffffff;--alkali-metal: #ff6b6b;--alkaline-earth: #ffa94d;--transition-metal: #ffd43b;--post-transition: #69db7c;--metalloid: #38d9a9;--nonmetal: #74c0fc;--halogen: #b197fc;--noble-gas: #f783ac;--lanthanide: #e599f7;--actinide: #ffa8a8;--text-dark: #2c3e50;--text-muted: #566370;--element-text: #1e293b;--element-text-secondary: #1e293b;--correct: #1a7a2e;--correct-bg: #d3f9d8;--correct-border: #51cf66;--wrong: #c62828;--wrong-bg: #ffe3e3;--wrong-border: #ff6b6b;--accent: #1971c2;--accent-hover: #1864ab;--accent-light: #4dabf7;--streak-color: #8a5200;--star-gold: #f59f00;--star-empty: #dee2e6;--focus-ring: #1971c2;--shadow-sm: 0 2px 4px rgba(0,0,0,.08);--shadow-md: 0 4px 12px rgba(0,0,0,.12);--shadow-lg: 0 8px 24px rgba(0,0,0,.16);--shadow-glow: 0 0 20px rgba(25, 113, 194, .3)}body{font-family:Nunito,system-ui,-apple-system,sans-serif;background:var(--bg-warm);color:var(--text-dark);min-height:100dvh;overflow-x:hidden;-webkit-font-smoothing:antialiased}#app{min-height:100dvh;display:flex;flex-direction:column;align-items:center}#game{width:100%;max-width:600px;padding:1rem;display:flex;flex-direction:column;align-items:center}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-100%;left:0;padding:.5rem 1rem;background:var(--accent);color:#fff;font-weight:700;z-index:10000;border-radius:0 0 8px;text-decoration:none}.skip-link:focus{top:0}:focus-visible{outline:3px solid var(--focus-ring);outline-offset:2px}:focus:not(:focus-visible){outline:none}h1,h2,h3{font-family:Fredoka One,cursive;line-height:1.2}h1{font-size:clamp(2rem,6vw,3rem);color:var(--text-dark)}h2{font-size:clamp(1.4rem,4vw,2rem);color:var(--text-dark)}h3{font-size:clamp(1.1rem,3vw,1.4rem);color:var(--text-dark)}.title-screen{text-align:center;padding:2rem 0;width:100%}.title-screen h1{margin-bottom:.5rem}.title-subtitle{font-size:clamp(1rem,3vw,1.3rem);color:var(--text-muted);font-weight:600;margin-bottom:2rem}.floating-elements{display:flex;justify-content:center;gap:.8rem;margin-bottom:2rem;flex-wrap:wrap}.mini-element{width:60px;height:70px;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--element-text);font-weight:800;box-shadow:var(--shadow-md);animation:float 3s ease-in-out infinite;cursor:default}.mini-element .number{font-size:.6rem;color:var(--element-text-secondary)}.mini-element .symbol{font-family:Fredoka One,cursive;font-size:1.4rem;line-height:1}.mini-element .name{font-size:.55rem;text-transform:uppercase;letter-spacing:.05em}.mini-element:nth-child(2){animation-delay:.3s}.mini-element:nth-child(3){animation-delay:.6s}.mini-element:nth-child(4){animation-delay:.9s}.mini-element:nth-child(5){animation-delay:1.2s}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.dad-joke{font-size:.9rem;color:var(--text-muted);font-style:italic;margin-bottom:2rem;padding:0 1rem;min-height:2.5em}.btn{font-family:Nunito,sans-serif;font-size:clamp(1rem,3vw,1.2rem);font-weight:700;padding:.9rem 2rem;border:none;border-radius:14px;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;touch-action:manipulation;-webkit-tap-highlight-color:transparent;min-height:48px;min-width:48px}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn:active{transform:translateY(0);box-shadow:var(--shadow-sm)}.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--accent-hover)}.btn-large{font-size:clamp(1.2rem,4vw,1.5rem);padding:1.1rem 2.5rem;border-radius:18px}.btn-start{background:linear-gradient(135deg,var(--accent),var(--accent-hover));color:#fff;box-shadow:var(--shadow-md),var(--shadow-glow);letter-spacing:.02em}.btn-start:hover{box-shadow:var(--shadow-lg),0 0 30px #1971c266}.btn-ghost{background:none;color:var(--text-muted);border:2px solid var(--star-empty)}.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}.mode-select{text-align:center;width:100%;padding:1rem 0}.mode-select h2{margin-bottom:1.5rem}.mode-grid{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem}.mode-card{background:var(--bg-card);border:3px solid transparent;border-radius:18px;padding:1.5rem;text-align:left;cursor:pointer;transition:transform .15s,box-shadow .15s,border-color .15s;box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:1rem;font-family:Nunito,sans-serif;min-height:48px}.mode-card:hover:not(:disabled){transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent)}.mode-card:active:not(:disabled){transform:translateY(0)}.mode-card:disabled{cursor:not-allowed}.mode-card:disabled .mode-icon{filter:grayscale(.6)}.mode-card:disabled .mode-info h3{color:var(--text-muted)}.mode-card:disabled .mode-info p{color:var(--text-muted)}.mode-icon{font-size:2rem;width:50px;height:50px;display:flex;align-items:center;justify-content:center;border-radius:12px;flex-shrink:0;color:var(--element-text)}.mode-info h3{margin-bottom:.2rem}.mode-info p{font-size:1rem;color:var(--text-dark);line-height:1.4}.level-select{text-align:center;width:100%;padding:1rem 0}.level-select h2{margin-bottom:1.5rem}.level-grid{display:flex;flex-direction:column;gap:.8rem;margin-bottom:1.5rem}.level-card{background:var(--bg-card);border:3px solid transparent;border-radius:14px;padding:1rem 1.2rem;text-align:left;cursor:pointer;transition:transform .15s,box-shadow .15s,border-color .15s;box-shadow:var(--shadow-sm);display:flex;align-items:center;gap:1rem;font-family:Nunito,sans-serif;min-height:48px}.level-card:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent)}.level-card:active:not(:disabled){transform:translateY(0)}.level-card:disabled{cursor:not-allowed}.level-locked{background:#f3f4f6}.level-locked .level-info h3,.level-locked .level-info p{color:var(--text-muted)}.level-number{width:42px;height:42px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:1.2rem;flex-shrink:0}.level-locked .level-number{background:#d1d5db;color:#9ca3af}.level-info{flex:1}.level-info h3{font-size:1rem;margin-bottom:.1rem}.level-info p{font-size:.95rem;color:var(--text-dark)}.level-stars{font-size:1.1rem;letter-spacing:.1em;flex-shrink:0}.playing-screen{width:100%;padding:.5rem 0}.hud{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:.5rem}.hud-left{display:flex;align-items:center;gap:.5rem}.btn-back{background:none;border:2px solid var(--star-empty);border-radius:10px;padding:.4rem .7rem;font-size:1rem;cursor:pointer;color:var(--text-muted);transition:border-color .15s,color .15s;min-height:44px;min-width:44px;display:flex;align-items:center;justify-content:center}.btn-back:hover{border-color:var(--accent);color:var(--accent)}.hud-level{font-weight:700;font-size:.9rem;color:var(--text-muted)}.hud-right{display:flex;align-items:center;gap:1rem}.hud-streak{font-weight:800;font-size:1rem;color:var(--wrong);opacity:0;transition:opacity .3s}.hud-streak.visible{opacity:1}.hud-score{font-weight:700;font-size:.9rem;color:var(--text-muted)}.btn-mute{background:none;border:2px solid var(--star-empty);border-radius:10px;padding:.3rem .5rem;font-size:1rem;cursor:pointer;color:var(--text-muted);transition:border-color .2s,color .2s;min-width:36px;min-height:36px;display:flex;align-items:center;justify-content:center}.btn-mute:hover{border-color:var(--accent);color:var(--accent)}.title-top-bar{display:flex;justify-content:flex-end;width:100%;margin-bottom:.5rem}.progress-bar{width:100%;height:8px;background:var(--star-empty);border-radius:4px;margin-bottom:1.5rem;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-light),var(--accent));border-radius:4px;transition:width .4s ease}.question-area{text-align:center;margin-bottom:1.5rem;width:100%}.question-text{font-size:clamp(1rem,3vw,1.2rem);font-weight:700;color:var(--text-dark);margin-bottom:1.2rem}.element-card-display{width:140px;height:170px;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 1rem;box-shadow:var(--shadow-md);color:var(--element-text);position:relative;animation:cardAppear .3s ease}@keyframes cardAppear{0%{transform:scale(.8) rotateY(90deg);opacity:0}to{transform:scale(1) rotateY(0);opacity:1}}.element-card-display .atomic-number{position:absolute;top:10px;left:12px;font-size:.8rem;font-weight:700;color:var(--element-text-secondary)}.element-card-display .atomic-number.bohr-corner{top:4px;left:4px;font-size:0;line-height:0}.bohr-diagram{display:block}.element-card-display .element-symbol{font-family:Fredoka One,cursive;font-size:3.5rem;line-height:1}.element-card-display .element-name{font-size:.85rem;font-weight:700;margin-top:.2rem}.element-card-display .element-mass{font-size:.65rem;color:var(--element-text-secondary);margin-top:.1rem}.hidden-text{color:transparent!important;text-shadow:0 0 12px rgba(0,0,0,.3)}.card-revealed{animation:cardReveal .4s ease}@keyframes cardReveal{0%{transform:rotateY(90deg)}to{transform:rotateY(0)}}.fact-card{background:var(--bg-card);border-radius:14px;padding:1.2rem;margin:0 auto 1rem;max-width:360px;box-shadow:var(--shadow-sm)}.fact-card p{font-size:.95rem;line-height:1.5;color:var(--text-dark)}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;width:100%;margin-bottom:1rem}.option-btn{font-family:Nunito,sans-serif;font-size:clamp(.95rem,2.5vw,1.1rem);font-weight:700;padding:1rem;border:3px solid var(--star-empty);border-radius:14px;background:var(--bg-card);cursor:pointer;transition:transform .15s,box-shadow .15s,border-color .15s,background .15s;min-height:56px;touch-action:manipulation;-webkit-tap-highlight-color:transparent;color:var(--text-dark)}.option-btn:hover:not(.option-correct):not(.option-wrong):not(.option-disabled){transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--accent)}.option-btn:active:not(.option-correct):not(.option-wrong):not(.option-disabled){transform:translateY(0)}.option-correct{background:var(--correct-bg);border-color:var(--correct-border);animation:correctPop .4s ease}@keyframes correctPop{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.option-wrong{background:var(--wrong-bg);border-color:var(--wrong-border);animation:wrongShake .4s ease}@keyframes wrongShake{0%,to{transform:translate(0)}25%{transform:translate(-6px)}75%{transform:translate(6px)}}.option-disabled{opacity:.5;cursor:default}.feedback{text-align:center;min-height:80px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:.5rem}.feedback-text{font-size:clamp(1.1rem,3vw,1.3rem);font-weight:800;margin-bottom:.3rem;animation:feedbackPop .3s ease}@keyframes feedbackPop{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.feedback-correct{color:var(--correct)}.feedback-wrong{color:var(--wrong)}.feedback-fact{font-size:.85rem;color:var(--text-muted);max-width:400px;line-height:1.4}.streak-message{font-size:.95rem;font-weight:800;color:var(--streak-color);animation:feedbackPop .3s ease}.btn-next{margin-top:.8rem;padding:.7rem 2.5rem;font-size:clamp(1rem,3vw,1.15rem);animation:feedbackPop .3s ease}.btn-hint{display:block;margin:0 auto .8rem;font-family:Nunito,sans-serif;font-size:.85rem;font-weight:700;color:var(--accent);background:none;border:2px dashed var(--accent-light);border-radius:10px;padding:.5rem 1.2rem;cursor:pointer;transition:background .15s,border-color .15s;min-height:44px}.btn-hint:hover{background:#4dabf714;border-color:var(--accent)}.hint-overlay{position:fixed;inset:0;background:#00000073;z-index:500;display:flex;align-items:center;justify-content:center;padding:1rem;animation:hintFadeIn .2s ease}@keyframes hintFadeIn{0%{opacity:0}to{opacity:1}}.hint-panel{background:var(--bg-warm);border-radius:20px;padding:1.5rem;max-width:480px;width:100%;max-height:85dvh;overflow-y:auto;box-shadow:var(--shadow-lg);text-align:center;animation:hintSlideUp .3s ease}@keyframes hintSlideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.hint-title{font-family:Fredoka One,cursive;font-size:clamp(1.2rem,4vw,1.5rem);color:var(--text-dark);margin-bottom:.2rem}.hint-subtitle{font-size:.9rem;font-weight:600;color:var(--text-muted);margin-bottom:1.2rem;font-style:italic}.hint-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(72px,1fr));gap:8px;margin-bottom:1.2rem}.hint-element{border-radius:10px;padding:6px 4px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--element-text);box-shadow:var(--shadow-sm);transition:transform .15s;min-height:64px}.hint-element:hover{transform:scale(1.08)}.hint-number{font-size:.6rem;font-weight:700;color:var(--element-text-secondary);line-height:1}.hint-symbol{font-family:Fredoka One,cursive;font-size:1.3rem;line-height:1.1}.hint-name{font-size:.55rem;font-weight:700;text-transform:uppercase;letter-spacing:.03em;line-height:1.2}.hint-close{margin-top:.5rem}.results-screen{text-align:center;width:100%;padding:2rem 0}.results-screen h2{margin-bottom:.5rem}.results-subtitle{color:var(--text-muted);font-size:1rem;margin-bottom:1.5rem}.results-stars{font-size:3rem;margin-bottom:1rem;letter-spacing:.2em}.results-score{font-size:1.1rem;font-weight:700;margin-bottom:.5rem}.results-message{font-size:.95rem;color:var(--text-muted);margin-bottom:2rem;font-style:italic}.results-buttons{display:flex;flex-direction:column;gap:.8rem;align-items:center}.collection-section{margin-top:2rem;text-align:center;width:100%}.collection-section h3{margin-bottom:1rem;font-size:1rem}.collection-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:4px;padding:.5rem}.collection-element{width:36px;height:40px;border-radius:6px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:.55rem;font-weight:700;transition:transform .3s,box-shadow .3s;color:var(--element-text)}.collection-element.collected{box-shadow:var(--shadow-sm)}.collection-element.uncollected{background:var(--star-empty);color:var(--text-muted)}.collection-element .col-symbol{font-family:Fredoka One,cursive;font-size:.75rem;line-height:1}.collection-element .col-number{font-size:.45rem;color:var(--element-text-secondary)}@keyframes collectPop{0%{transform:scale(0) rotate(-180deg)}60%{transform:scale(1.3) rotate(10deg)}to{transform:scale(1) rotate(0)}}.collection-element.just-collected{animation:collectPop .5s ease}.victory-screen{text-align:center;padding:2rem 0;width:100%}.victory-screen h1{margin-bottom:.5rem;animation:float 2s ease-in-out infinite}.victory-subtitle{font-size:1.2rem;font-weight:700;color:var(--text-muted);margin-bottom:1.5rem}.victory-stats{font-size:1rem;margin-bottom:2rem}.victory-stats .stat-muted{color:var(--text-muted)}.confetti-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1000;overflow:hidden}.confetti-piece{position:absolute;width:10px;height:10px;border-radius:2px;animation:confettiFall linear forwards}@keyframes confettiFall{0%{transform:translateY(-10px) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}.build-card-display{width:100px;height:110px;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto .8rem;box-shadow:var(--shadow-md);color:var(--element-text);position:relative;animation:cardAppear .3s ease}.build-card-display .atomic-number{position:absolute;top:8px;left:10px;font-size:.65rem;font-weight:700;color:var(--element-text-secondary)}.build-card-display .element-symbol{font-family:Fredoka One,cursive;font-size:2.2rem;line-height:1}.build-card-display .element-name{font-size:.7rem;font-weight:700;margin-top:.15rem}.build-grid{display:grid;grid-template-columns:18px repeat(18,1fr);gap:3px;width:calc(100vw - 2rem);max-width:900px;margin:0 auto 1rem;position:relative;left:50%;transform:translate(-50%)}.build-row-label{display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:clamp(.5rem,1.5vw,.7rem);color:var(--text-muted);-webkit-user-select:none;user-select:none}.build-cell{aspect-ratio:1;border-radius:4px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:clamp(.45rem,1.5vw,.7rem);font-weight:700;color:var(--element-text);position:relative;padding:1px;border:none;background:none}.build-cell-number{font-size:clamp(.25rem,.8vw,.4rem);line-height:1;color:var(--element-text-secondary)}.build-cell-symbol{font-family:Fredoka One,cursive;font-size:clamp(.55rem,2vw,.9rem);line-height:1.1}.build-cell--empty{visibility:hidden}.build-cell--ghost{background:#0000000a;border:1.5px solid rgba(0,0,0,.08);border-radius:4px}.build-cell--filled{border-radius:4px;box-shadow:0 1px 3px #0000001f}.build-cell--blank{border:2.5px dashed var(--accent);border-radius:5px;cursor:pointer;transition:transform .1s,box-shadow .15s,background .15s;touch-action:manipulation;-webkit-tap-highlight-color:transparent;color:var(--accent);background:#4dabf714;transform:scale(1.08);z-index:1}.build-cell--blank:hover:not(:disabled){transform:scale(1.2);box-shadow:0 0 8px #1971c240;background:#4dabf726;z-index:2}.build-cell--blank:disabled{cursor:default;transform:scale(1)}.build-cell--blank .build-cell-symbol{color:var(--accent);font-size:clamp(.65rem,2.5vw,1rem)}.build-cell--hint-row{border-color:var(--accent);animation:hintPulse .8s ease-in-out infinite;background:#4dabf71f}@keyframes hintPulse{0%,to{box-shadow:0 0 #4dabf700}50%{box-shadow:0 0 10px #4dabf766}}.build-cell--revealed{border-radius:4px;border:2px solid var(--correct-border);animation:feedbackPop .3s ease}.build-cell--just-placed{animation:placePop .4s ease}@keyframes placePop{0%{transform:scale(.5)}60%{transform:scale(1.2)}to{transform:scale(1)}}@media(max-width:400px){#game{padding:.5rem}.options-grid{grid-template-columns:1fr}.element-card-display{width:120px;height:145px}.element-card-display .element-symbol{font-size:2.8rem}.floating-elements{gap:.5rem}.mini-element{width:50px;height:58px}.mini-element .symbol{font-size:1.1rem}.build-grid{gap:2px;grid-template-columns:14px repeat(18,1fr)}.build-card-display{width:85px;height:95px}.build-card-display .element-symbol{font-size:1.8rem}.build-cell--blank{border-width:2px}}.science-lab{text-align:center;width:100%;margin-top:2rem;padding:1.5rem 1rem;background:var(--bg-card);border-radius:18px;box-shadow:var(--shadow-sm)}.science-lab h3{font-size:1.2rem;margin-bottom:.3rem}.lab-subtitle{font-size:.85rem;color:var(--text-muted);margin-bottom:1rem}.toy-scene{width:250px;height:200px;margin:0 auto;position:relative;border-radius:14px;background:#e8ecf4;overflow:hidden;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;display:flex;align-items:center;justify-content:center}.toy-caption{font-size:.85rem;color:var(--text-muted);margin-top:.8rem;font-style:italic;line-height:1.4;padding:0 .5rem}.btn-try-another{margin-top:.8rem;font-size:.85rem;padding:.5rem 1.2rem}.toy-he{background:linear-gradient(180deg,#dbeafe,#e8ecf4)}.toy-he-balloon{width:60px;height:72px;background:var(--noble-gas);border-radius:50% 50% 45% 45%;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:1.4rem;color:var(--element-text);position:absolute;bottom:50px;left:50%;transform:translate(-50%);transition:transform .3s;z-index:2}.toy-he-string{position:absolute;bottom:20px;left:50%;width:2px;height:50px;background:#94a3b8;transform:translate(-50%);z-index:1}.toy-he.toy-active .toy-he-balloon{animation:balloonFloat 1.5s ease-out forwards}.toy-he.toy-active .toy-he-string{animation:stringDangle .3s ease forwards}@keyframes balloonFloat{0%{transform:translate(-50%) translateY(0) rotate(0)}30%{transform:translate(-50%) translateY(-40px) rotate(-5deg)}60%{transform:translate(-30%) translateY(-120px) rotate(5deg)}to{transform:translate(-20%) translateY(-250px) rotate(-3deg);opacity:0}}@keyframes stringDangle{0%{transform:translate(-50%)}to{transform:translate(-50%) translateY(20px);opacity:0}}.toy-h{background:linear-gradient(180deg,#1e293b,#334155 60%,#64748b)}.toy-h-rocket{position:absolute;bottom:30px;left:50%;transform:translate(-50%);z-index:2}.toy-h-body{width:40px;height:70px;background:linear-gradient(135deg,#e2e8f0,#cbd5e1);border-radius:8px 8px 4px 4px;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:.9rem;color:var(--text-dark);position:relative}.toy-h-nose{position:absolute;top:-15px;left:50%;transform:translate(-50%);width:0;height:0;border-left:20px solid transparent;border-right:20px solid transparent;border-bottom:18px solid #ff6b6b}.toy-h-fin-l,.toy-h-fin-r{position:absolute;bottom:0;width:0;height:0;border-top:15px solid transparent;border-bottom:0}.toy-h-fin-l{left:-10px;border-right:12px solid #94a3b8}.toy-h-fin-r{right:-10px;border-left:12px solid #94a3b8}.toy-h-flame{position:absolute;bottom:10px;left:50%;transform:translate(-50%);width:24px;height:35px;background:radial-gradient(ellipse at bottom,#ffd43b,#ff6b6b,transparent);border-radius:50% 50% 20% 20%;opacity:0;z-index:1}.toy-h-tap{position:absolute;bottom:8px;font-size:.75rem;font-weight:800;color:#94a3b8;width:100%;text-align:center}.toy-h-countdown{position:absolute;bottom:8px;width:100%;text-align:center}.toy-h.toy-active .toy-h-rocket{animation:rocketLaunch 1.2s ease-in forwards}.toy-h.toy-active .toy-h-flame{opacity:1;animation:flameBurn .15s ease-in-out infinite alternate,rocketLaunch 1.2s ease-in forwards}@keyframes rocketLaunch{0%{transform:translate(-50%) translateY(0)}10%{transform:translate(-50%) translateY(2px)}30%{transform:translate(-50%) translateY(-20px)}to{transform:translate(-50%) translateY(-300px)}}@keyframes flameBurn{0%{height:30px;width:20px}to{height:45px;width:28px}}.toy-o{background:linear-gradient(180deg,#dbeafe,#93c5fd)}.toy-o-water{position:absolute;bottom:0;left:0;right:0;height:150px;background:#3b82f633;border-radius:0 0 14px 14px}.toy-o-bubble{position:absolute;bottom:10px;width:16px;height:16px;border-radius:50%;background:#fff9;border:2px solid rgba(255,255,255,.8);animation:bubbleRise 2.5s ease-in-out infinite}.toy-o-new{animation:bubbleRise 1.8s ease-in-out forwards!important;width:12px;height:12px}@keyframes bubbleRise{0%{transform:translateY(0) scale(.8);opacity:.6}50%{transform:translateY(-60px) scale(1);opacity:.9}to{transform:translateY(-130px) scale(.6);opacity:0}}.toy-o-label{position:absolute;top:12px;right:12px;font-family:Fredoka One,cursive;font-size:1.2rem;color:var(--text-dark);opacity:.6}.toy-c{perspective:500px;background:linear-gradient(135deg,#f8fafc,#e2e8f0)}.toy-c-card{width:120px;height:140px;position:relative;transform-style:preserve-3d;transition:transform .6s ease}.toy-c.toy-active .toy-c-card{transform:rotateY(180deg)}.toy-c-front,.toy-c-back{position:absolute;inset:0;backface-visibility:hidden;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}.toy-c-front{background:#94a3b8}.toy-c-back{background:linear-gradient(135deg,#dbeafe,#a5b4fc);transform:rotateY(180deg)}.toy-c-pencil,.toy-c-diamond{font-size:3rem}.toy-c-label{font-family:Fredoka One,cursive;font-size:.9rem;color:var(--element-text);margin-top:.3rem}.toy-c-same{position:absolute;bottom:12px;width:100%;text-align:center;font-size:.8rem;font-weight:800;color:var(--text-muted)}.toy-n{background:linear-gradient(135deg,#fef3c7,#fde68a)}.toy-n-bag{width:80px;height:110px;background:linear-gradient(135deg,#f59e0b,#d97706);border-radius:8px 8px 12px 12px;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:transform .4s ease,border-radius .4s ease;box-shadow:var(--shadow-sm)}.toy-n.toy-active .toy-n-bag{transform:scaleX(1.3) scaleY(1.15);border-radius:20px}.toy-n-text{font-family:Fredoka One,cursive;font-size:1rem;color:#fff;letter-spacing:.1em}.toy-n-label{font-size:.7rem;font-weight:700;color:#fffc;margin-top:.2rem}.toy-na{background:linear-gradient(180deg,#e8ecf4 0% 45%,#93c5fd 45%,#3b82f6)}.toy-na-chunk{position:absolute;top:25px;left:50%;transform:translate(-50%);width:36px;height:30px;background:#d1d5db;border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:.9rem;color:var(--text-dark);box-shadow:var(--shadow-sm);z-index:3}.toy-na.toy-active .toy-na-chunk{animation:sodiumDrop .5s ease-in forwards}@keyframes sodiumDrop{0%{transform:translate(-50%) translateY(0)}to{transform:translate(-50%) translateY(60px);opacity:.5}}.toy-na-water{position:absolute;bottom:0;left:0;right:0;height:55%;overflow:hidden}.toy-na-fizz{position:absolute;bottom:30px;left:45%;width:8px;height:8px;border-radius:50%;background:#ffffffb3;opacity:0}.toy-na.toy-active .toy-na-fizz{animation:fizzBubble .8s ease-out .4s forwards}@keyframes fizzBubble{0%{transform:translateY(0) scale(.5);opacity:1}to{transform:translateY(-50px) scale(1.5);opacity:0}}.toy-na-splash{position:absolute;top:45%;left:50%;transform:translate(-50%);width:0;height:0;border-radius:50%;background:#3b82f64d;opacity:0;z-index:2}.toy-na.toy-active .toy-na-splash{animation:splashRing .6s ease-out .35s forwards}@keyframes splashRing{0%{width:0;height:0;opacity:1}to{width:100px;height:30px;opacity:0;transform:translate(-50%)}}.toy-fe{background:#f1f5f9}.toy-fe-card{width:50px;height:60px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:1.3rem;color:var(--element-text);box-shadow:var(--shadow-sm);position:absolute;left:40px;transition:transform .5s ease;z-index:2}.toy-fe.toy-active .toy-fe-card{animation:magnetPull .5s ease-in forwards}@keyframes magnetPull{0%{transform:translate(0)}70%{transform:translate(68px)}80%{transform:translate(65px)}to{transform:translate(68px)}}.toy-fe-magnet{position:absolute;right:30px;width:50px;height:60px;border-radius:8px;display:flex;overflow:hidden;box-shadow:var(--shadow-sm)}.toy-fe-n{flex:1;background:#ef4444;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem;color:#fff}.toy-fe-s{flex:1;background:#3b82f6;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem;color:#fff}.toy-p{background:#fef9c3;transition:background .5s ease}.toy-p.toy-active{background:#1e293b}.toy-p-card{width:60px;height:70px;background:var(--nonmetal);border-radius:10px;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:2rem;color:var(--element-text);transition:box-shadow .5s ease,background .5s ease}.toy-p.toy-active .toy-p-card{background:#22c55e;box-shadow:0 0 20px #22c55e,0 0 40px #22c55e,0 0 60px #22c55e66;color:#fff}.toy-p-switch{position:absolute;top:10px;right:12px;font-size:1.5rem}.toy-au{background:linear-gradient(135deg,#fef3c7,#fde68a)}.toy-au-bar{width:120px;height:60px;background:linear-gradient(135deg,#f59e0b,#d97706);border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:1.8rem;color:#92400e;box-shadow:0 4px 12px #d977064d;position:relative}.toy-au-sparkle{position:absolute;font-size:1rem;color:#fef3c7;opacity:0}.toy-au-s1{top:-8px;right:-5px}.toy-au-s2{bottom:-8px;left:10px}.toy-au-s3{top:5px;right:20px}.toy-au.toy-active .toy-au-sparkle{animation:sparkleShine 1s ease-in-out forwards}.toy-au.toy-active .toy-au-s2{animation-delay:.2s}.toy-au.toy-active .toy-au-s3{animation-delay:.4s}.toy-au.toy-active .toy-au-bar{animation:goldGleam 1s ease-in-out}@keyframes sparkleShine{0%{opacity:0;transform:scale(.5)}50%{opacity:1;transform:scale(1.5)}to{opacity:0;transform:scale(.5) rotate(90deg)}}@keyframes goldGleam{0%{box-shadow:0 4px 12px #d977064d}50%{box-shadow:0 0 30px #f59e0bcc,0 0 60px #f59e0b66}to{box-shadow:0 4px 12px #d977064d}}.toy-cu{background:#f8fafc}.toy-cu-penny{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#d97706,#b45309);display:flex;align-items:center;justify-content:center;box-shadow:inset 0 2px 4px #0003,var(--shadow-sm);transition:background 2s ease}.toy-cu.toy-active .toy-cu-penny{animation:oxidize 2s ease forwards}@keyframes oxidize{0%{background:linear-gradient(135deg,#d97706,#b45309)}40%{background:linear-gradient(135deg,#92400e,#78716c)}70%{background:linear-gradient(135deg,#6b8e6b,#4a7c59)}to{background:linear-gradient(135deg,#22c55e,#16a34a)}}.toy-cu-face{font-family:Fredoka One,cursive;font-size:1.5rem;color:#ffffffe6}.toy-cu-year{position:absolute;bottom:15px;font-size:.8rem;font-weight:700;color:var(--text-muted)}.toy-ag{background:linear-gradient(135deg,#f1f5f9,#e2e8f0)}.toy-ag-mirror{width:100px;height:130px;background:linear-gradient(180deg,#e2e8f0,#f8fafc,#e2e8f0);border-radius:60px 60px 10px 10px;border:4px solid #cbd5e1;display:flex;align-items:center;justify-content:center;font-family:Fredoka One,cursive;font-size:2rem;color:#94a3b8;position:relative;overflow:hidden}.toy-ag-ripple{position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;border:2px solid rgba(148,163,184,.6);transform:translate(-50%,-50%);opacity:0}.toy-ag.toy-active .toy-ag-ripple{animation:mirrorRipple 1s ease-out forwards}@keyframes mirrorRipple{0%{width:0;height:0;opacity:1}to{width:150px;height:150px;opacity:0}}.toy-ag.toy-active .toy-ag-mirror{animation:mirrorFlash .6s ease}@keyframes mirrorFlash{0%{background:linear-gradient(180deg,#e2e8f0,#f8fafc,#e2e8f0)}50%{background:linear-gradient(180deg,#f8fafc,#fff,#f8fafc)}to{background:linear-gradient(180deg,#e2e8f0,#f8fafc,#e2e8f0)}}.toy-pt{background:#f1f5f9;flex-direction:row;gap:0}.toy-pt-pipe{width:80px;height:50px;background:linear-gradient(180deg,#9ca3af,#6b7280);border-radius:6px;display:flex;align-items:center;justify-content:center;z-index:2}.toy-pt-label{font-family:Fredoka One,cursive;font-size:1.2rem;color:#fff}.toy-pt-dirty{position:absolute;left:25px;font-size:2rem;transition:opacity .5s ease}.toy-pt.toy-active .toy-pt-dirty{opacity:0}.toy-pt-clean{position:absolute;right:25px;font-size:2rem;opacity:0}.toy-pt.toy-active .toy-pt-clean{animation:cleanAppear .8s ease .3s forwards}@keyframes cleanAppear{0%{opacity:0;transform:scale(.5)}to{opacity:1;transform:scale(1)}}.compare-question{font-family:Fredoka One,cursive;font-size:clamp(1.1rem,3.5vw,1.4rem);text-align:center;color:var(--text-dark);margin-bottom:1.5rem}.compare-container{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:1.5rem;width:100%}.compare-vs{font-family:Fredoka One,cursive;font-size:clamp(1rem,3vw,1.3rem);color:var(--text-muted);flex-shrink:0}.compare-card{width:140px;height:170px;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--element-text);box-shadow:var(--shadow-md);cursor:pointer;border:3px solid transparent;transition:transform .15s,box-shadow .15s,border-color .15s;position:relative;font-family:Nunito,sans-serif;animation:cardAppear .3s ease;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.compare-card:hover:not(:disabled){transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--accent)}.compare-card:active:not(:disabled){transform:translateY(0)}.compare-card:disabled{cursor:default}.compare-card-number{position:absolute;top:10px;left:12px;font-size:.8rem;font-weight:700;color:var(--element-text-secondary)}.compare-card-number.bohr-corner{top:4px;left:4px;font-size:0;line-height:0}.compare-card-symbol{font-family:Fredoka One,cursive;font-size:3rem;line-height:1}.compare-card-name{font-size:.85rem;font-weight:700;margin-top:.2rem}.compare-card-detail{font-size:.7rem;font-weight:700;margin-top:.4rem;color:var(--element-text-secondary);animation:feedbackPop .3s ease}.compare-card--correct{border-color:var(--correct-border);animation:correctPop .4s ease;box-shadow:0 0 16px #51cf6666}.compare-card--wrong{animation:wrongShake .4s ease;opacity:.6}@media(max-width:400px){.compare-container{flex-direction:column;gap:.8rem}.compare-card{width:120px;height:145px}.compare-card-symbol{font-size:2.5rem}.compare-vs{font-size:.9rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
