*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}:root{--primary: #FF6B6B;--secondary: #4ECDC4;--accent: #FFE66D;--purple: #9B5DE5;--blue: #45B7D1;--green: #2EC4B6;--orange: #FF9F1C;--pink: #FF5E87;--text: #2C3E50;--light-gray: #F8F9FA;--shadow-sm: 0 4px 12px rgba(0, 0, 0, .1);--shadow-md: 0 8px 24px rgba(0, 0, 0, .15);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .2)}body{font-family:Nunito,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2,#f093fb);background-size:400% 400%;animation:gradientMove 20s ease infinite;min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px;overflow-x:hidden}.floating-decoration{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}.float-star{position:absolute;font-size:2rem;opacity:.3;animation:float 10s infinite ease-in-out}.float-star:nth-child(1){top:10%;left:10%;animation-delay:0s}.float-star:nth-child(2){top:20%;right:15%;animation-delay:2s}.float-star:nth-child(3){top:60%;left:20%;animation-delay:4s}.float-star:nth-child(4){top:80%;right:10%;animation-delay:6s}.float-star:nth-child(5){top:40%;right:30%;animation-delay:8s}@keyframes gradientMove{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes float{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(10deg)}}.container{position:relative;z-index:10;width:100%;max-width:800px;background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:32px;padding:40px;box-shadow:var(--shadow-lg);border:3px solid rgba(255,255,255,.4);min-height:600px}.page{display:none;animation:slideUp .5s cubic-bezier(.4,0,.2,1)}.page.active{display:block}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.header-badge{display:inline-block;margin:0 auto 16px;background:var(--accent);color:var(--text);padding:8px 20px;border-radius:20px;font-weight:800;font-size:.9rem;box-shadow:var(--shadow-sm);display:flex;justify-content:center;width:fit-content}h1,h2,h3{text-align:center;color:var(--text);font-weight:800}h1{font-size:3rem;margin-bottom:12px;background:linear-gradient(135deg,var(--primary),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:0 2px 10px rgba(255,107,107,.2)}.subtitle{text-align:center;color:#666;font-size:1.3rem;margin-bottom:40px;font-weight:600}.back-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;background:var(--light-gray);color:var(--text);border-radius:16px;font-weight:700;cursor:pointer;transition:all .3s ease;margin-bottom:24px;width:fit-content}.back-btn:hover{background:var(--primary);color:#fff;transform:translate(-4px)}.game-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-bottom:40px}.game-card{position:relative;background:linear-gradient(135deg,var(--blue),var(--green));border-radius:24px;padding:32px 24px;text-align:center;color:#fff;cursor:pointer;transition:all .4s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-md);border:3px solid rgba(255,255,255,.3);overflow:hidden}.game-card:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.3) 0%,transparent 70%);transform:scale(0);transition:transform .5s ease}.game-card:hover{transform:translateY(-12px) scale(1.05);box-shadow:var(--shadow-lg)}.game-card:hover:before{transform:scale(1)}.game-icon{font-size:5rem;margin-bottom:16px;filter:drop-shadow(0 4px 12px rgba(0,0,0,.2));z-index:2;position:relative}.game-name{font-size:1.5rem;font-weight:800;margin-bottom:8px;position:relative;z-index:2}.game-desc{font-size:1rem;opacity:.9;font-weight:600;position:relative;z-index:2}.difficulty-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}.diff-card{position:relative;background:#fff;border-radius:24px;padding:32px 24px;text-align:center;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-sm);border:3px solid transparent}.diff-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-md);border-color:var(--secondary)}.diff-card.recommended{border-color:var(--accent);background:linear-gradient(135deg,#fff9e6,#fff3cd)}.recommend-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);background:var(--accent);color:var(--text);padding:4px 16px;border-radius:12px;font-size:.8rem;font-weight:800}.diff-icon{font-size:4rem;margin-bottom:16px}.diff-card h3{font-size:1.3rem;margin-bottom:12px}.diff-card p{color:#666;font-size:.95rem;line-height:1.5;font-weight:600}.game-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;gap:16px}.score-display{display:flex;align-items:center;gap:8px;background:var(--accent);padding:12px 20px;border-radius:20px;font-weight:800;font-size:1.2rem;min-width:100px;justify-content:center}.score-icon{font-size:1.5rem}.progress-container{flex:1;display:flex;align-items:center;gap:12px}.progress-bar{flex:1;height:16px;background:var(--light-gray);border-radius:12px;overflow:hidden;box-shadow:inset 0 2px 4px #0000001a}.progress-fill{height:100%;background:linear-gradient(90deg,var(--green),var(--secondary));transition:width .5s cubic-bezier(.4,0,.2,1);border-radius:12px}.progress-text{font-weight:700;font-size:1rem;color:var(--text);min-width:50px;text-align:center}.pause-btn{font-size:1.5rem;background:var(--light-gray);padding:10px 14px;border-radius:12px;cursor:pointer;transition:all .3s ease}.pause-btn:hover{background:var(--primary);color:#fff;transform:scale(1.1)}.question-card{background:linear-gradient(135deg,#fff,#f8f9fa);border-radius:28px;padding:40px 24px;text-align:center;margin-bottom:32px;box-shadow:var(--shadow-md);border:3px solid rgba(255,255,255,.5)}.emoji-area{font-size:3.5rem;line-height:4.5rem;margin-bottom:24px;min-height:10rem;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px}.math-expression{font-size:4rem;font-weight:800;color:var(--text)}.options-container{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:24px}.option-btn{padding:32px 24px;font-size:2.5rem;font-weight:800;border:none;border-radius:24px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-md);border:3px solid rgba(255,255,255,.3)}.option-btn:hover{transform:translateY(-6px) scale(1.03);box-shadow:var(--shadow-lg)}.option-btn:active{transform:translateY(-3px) scale(.98)}.option-btn.correct{background:linear-gradient(135deg,var(--green),#21a89a);animation:bounceIn .6s ease}.option-btn.wrong{background:linear-gradient(135deg,var(--primary),#e55353);animation:shake .4s ease}@keyframes bounceIn{0%{transform:scale(.8);opacity:.7}50%{transform:scale(1.1)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-8px)}75%{transform:translate(8px)}}.feedback-area{text-align:center;min-height:6rem;display:flex;align-items:center;justify-content:center;font-size:2.5rem;font-weight:800;animation:pop .4s ease}.feedback-area.correct{color:var(--green)}.feedback-area.wrong{color:var(--primary)}@keyframes pop{0%{transform:scale(0);opacity:0}70%{transform:scale(1.3)}to{transform:scale(1);opacity:1}}.result-badge{display:flex;justify-content:center;width:fit-content;margin:0 auto 24px;background:var(--accent);color:var(--text);padding:10px 24px;border-radius:24px;font-weight:800;font-size:1.2rem}.star-display{text-align:center;font-size:5rem;margin-bottom:24px;animation:rotateStar 1s ease}@keyframes rotateStar{0%{transform:rotate(0) scale(.5)}to{transform:rotate(360deg) scale(1)}}#result-title{font-size:2rem;margin-bottom:32px;color:var(--text)}.result-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:40px}.result-card{background:#fff;border-radius:24px;padding:24px 16px;text-align:center;box-shadow:var(--shadow-sm);border:2px solid var(--light-gray)}.result-num{font-size:3rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.result-label{color:#666;font-weight:700;font-size:1rem}.action-buttons{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.action-btn{padding:18px 36px;border:none;border-radius:20px;font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:var(--shadow-sm)}.action-btn.primary{background:linear-gradient(135deg,var(--primary),var(--pink));color:#fff}.action-btn.secondary{background:var(--light-gray);color:var(--text)}.action-btn:hover{transform:translateY(-4px) scale(1.05);box-shadow:var(--shadow-md)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;display:none;align-items:center;justify-content:center;z-index:100}.modal.active{display:flex;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:#fff;border-radius:24px;padding:40px;text-align:center;max-width:400px;width:90%;animation:modalSlideUp .4s ease}@keyframes modalSlideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-content h3{margin-bottom:32px;font-size:1.5rem}.modal-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.modal-btn{padding:12px 28px;border:none;border-radius:16px;font-weight:700;cursor:pointer;transition:all .3s ease;background:var(--secondary);color:#fff;font-size:1rem}.modal-btn.secondary{background:var(--light-gray);color:var(--text)}.modal-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.stats{text-align:center;color:#666;font-size:1.1rem;padding:20px;background:var(--light-gray);border-radius:20px;font-weight:600;margin-top:24px}@media (max-width: 600px){.container{padding:24px;min-height:auto}h1{font-size:2.2rem}.math-expression{font-size:3rem}.emoji-area{font-size:2.5rem}.option-btn{font-size:2rem;padding:24px 16px}.result-cards,.game-grid,.difficulty-cards{grid-template-columns:1fr}.game-header{flex-wrap:wrap}.progress-container{order:3;width:100%}}