:root{--primary: #58cc02;--primary-dark: #46a302;--secondary: #1cb0f6;--bg: #0a0a0c;--card-bg: #1a1a1e;--text: #ffffff;--text-dim: #888;--border: #2a2a2f;--accent: #ffc800;--error: #ff4b4b;--success: #58cc02;--purple: #7c3aed;--orange: #ff6b35}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{scroll-behavior:smooth}body{margin:0;font-family:Outfit,sans-serif;background-color:var(--bg);color:var(--text);overflow-x:hidden;-webkit-user-select:none;user-select:none;-webkit-font-smoothing:antialiased}#root{min-height:100vh;display:flex;flex-direction:column}.container{max-width:600px;margin:0 auto;padding:20px 20px 40px;width:100%}button{cursor:pointer;border:none;border-radius:16px;font-family:inherit;font-weight:700;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:0 4px #0003;-webkit-tap-highlight-color:transparent}button:active{transform:translateY(2px);box-shadow:0 2px #0003}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:16px 24px;width:100%;font-size:16px;position:relative;overflow:hidden}.btn-primary:after{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);transition:left .5s}.btn-primary:active:after{left:100%}.btn-secondary{background-color:var(--card-bg);border:2px solid var(--border);color:var(--text);padding:16px 24px;font-size:16px}.btn-secondary:active{background-color:var(--border)}.card{background:var(--card-bg);border:1.5px solid var(--border);border-radius:20px;padding:20px;margin-bottom:12px;position:relative;overflow:hidden;transition:transform .15s ease,border-color .2s ease}.glass{background:rgba(26,26,30,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.08)}.progress-bar{height:10px;background:var(--border);border-radius:10px;overflow:hidden;margin-bottom:16px}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),#7cdb40);border-radius:10px;transition:width .4s cubic-bezier(.4,0,.2,1);position:relative}.progress-fill:after{content:"";position:absolute;top:0;right:0;width:20px;height:100%;background:rgba(255,255,255,.3);border-radius:10px;filter:blur(4px)}.animate-pop{animation:pop .4s cubic-bezier(.175,.885,.32,1.275)}@keyframes pop{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes glow{0%,to{box-shadow:0 0 5px #58cc024d}50%{box-shadow:0 0 20px #58cc0299}}.option-btn{background:var(--card-bg);border:2px solid var(--border);border-bottom:4px solid var(--border);color:var(--text);padding:16px 20px;border-radius:16px;text-align:left;font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:12px;width:100%;transition:all .15s ease}.option-btn:active{transform:translateY(2px);border-bottom-width:2px}.option-btn.correct{border-color:var(--success);border-bottom-color:var(--success);background:rgba(88,204,2,.12);color:var(--success);animation:correctPulse .3s ease}.option-btn.wrong{border-color:var(--error);border-bottom-color:var(--error);background:rgba(255,75,75,.12);color:var(--error);animation:shake .4s ease}@keyframes correctPulse{0%{transform:scale(1)}50%{transform:scale(1.02)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.topic-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;font-weight:700}.topic-icon.unlocked{background:rgba(255,255,255,.05)}.topic-icon.locked{background:var(--border);opacity:.6}.stat-badge{padding:6px 14px;border-radius:12px;display:flex;align-items:center;gap:6px;font-weight:600;font-size:14px}.xp-level-bar{height:6px;background:var(--border);border-radius:6px;overflow:hidden;margin-top:8px}.xp-level-fill{height:100%;background:linear-gradient(90deg,var(--accent),#ffe066);border-radius:6px;transition:width .6s ease}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.dots{display:flex;gap:8px;justify-content:center;margin:24px 0}.dot{width:8px;height:8px;border-radius:50%;background:var(--border);transition:all .3s ease}.dot.active{width:24px;border-radius:4px;background:var(--primary)}