@import"https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Orbitron:wght@500;700;900&display=swap";:root{--bg-dark: #020617;--panel-bg: rgba(15, 23, 42, .8);--border-color: rgba(56, 189, 248, .3);--text-main: #f8fafc;--text-muted: #94a3b8;--cyan: #06b6d4;--blue: #3b82f6;--pink: #ec4899;--yellow: #eab308;--green: #10b981;--red: #ef4444}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);background-image:linear-gradient(to right,rgba(6,182,212,.05) 1px,transparent 1px),linear-gradient(to bottom,rgba(6,182,212,.05) 1px,transparent 1px);background-size:40px 40px;color:var(--text-main);font-family:JetBrains Mono,monospace;display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden;touch-action:manipulation}.app-container{position:relative;width:100%;max-width:480px;height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px}.panel{background:var(--panel-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:24px;padding:32px 24px;width:100%;display:flex;flex-direction:column;align-items:center;gap:20px;box-shadow:0 25px 50px -12px #0009,inset 0 0 20px #06b6d41a;position:relative}.neon-title{font-family:Orbitron,sans-serif;font-size:2.2rem;font-weight:900;text-align:center;color:#fff;text-shadow:0 0 10px var(--cyan),0 0 20px var(--blue),0 0 40px var(--blue);margin-bottom:8px}.high-score-display{display:flex;align-items:center;gap:8px;font-size:1.1rem;font-weight:700;background:#0006;padding:8px 16px;border-radius:12px;border:1px solid rgba(234,179,8,.4);box-shadow:0 0 15px #eab3081a}.hint-text{color:var(--text-muted);font-size:.9rem;text-align:center}.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:16px;border:none;border-radius:16px;font-family:Orbitron,sans-serif;font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .2s ease;text-transform:uppercase}.primary-btn{background:linear-gradient(135deg,var(--cyan),var(--blue));color:#fff;box-shadow:0 0 20px #06b6d466}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 0 30px #06b6d499}.primary-btn:active{transform:translateY(1px)}.game-wrapper{width:100%;display:flex;flex-direction:column;gap:16px;align-items:center}.hud{display:flex;justify-content:space-between;align-items:center;width:100%;background:var(--panel-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--border-color);border-radius:16px;padding:12px 20px}.hud-item{display:flex;align-items:center;gap:6px;font-family:Orbitron,sans-serif;font-size:1.2rem;font-weight:700}.calculator-body{width:100%;background:#0f172a;border-radius:24px;padding:16px;border:2px solid rgba(56,189,248,.2);box-shadow:0 10px 30px #000c,inset 0 0 20px #00000080;display:flex;flex-direction:column;gap:16px;position:relative}.display-screen{background:#020617;border-radius:16px;padding:20px;min-height:120px;display:flex;flex-direction:column;justify-content:space-between;align-items:flex-end;border:1px solid rgba(56,189,248,.4);box-shadow:inset 0 0 20px #06b6d41a;position:relative;overflow:hidden}.question-text{font-size:1.5rem;color:var(--text-muted);font-family:Orbitron,sans-serif}.operator{color:var(--pink);margin:0 4px}.answer-text{font-size:3rem;font-weight:700;color:var(--cyan);text-shadow:0 0 10px var(--cyan);letter-spacing:2px}.cursor.blink{animation:blink 1s step-end infinite;opacity:.7}.feedback-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:#020617cc;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:10}.keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;position:relative;padding:10px;background:#1e293b80;border-radius:16px}.keypad-bg{position:absolute;top:0;left:0;pointer-events:none;border-radius:16px;opacity:.5}.key-btn{background:#334155cc;border:1px solid rgba(148,163,184,.2);border-radius:12px;color:#fff;font-size:1.5rem;font-family:Orbitron,sans-serif;padding:16px 0;cursor:pointer;transition:all .1s;box-shadow:0 4px 6px #0000004d;position:relative;z-index:1}.key-btn:active{transform:scale(.95);background:#475569e6}.op-btn{background:#0f172ae6;color:var(--cyan);border-color:#06b6d44d}.eq-btn{background:linear-gradient(135deg,var(--pink),#be185d);color:#fff;border:none;box-shadow:0 0 15px #ec489966}.zero-btn{grid-column:span 2}.gameover-title{font-family:Orbitron,sans-serif;font-size:2rem;color:var(--cyan);text-shadow:0 0 15px rgba(6,182,212,.5)}.stats-box{width:100%;background:#0006;border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:12px}.stat-row{display:flex;justify-content:space-between;align-items:center;font-size:1.1rem;color:var(--text-muted)}.stat-val{font-family:Orbitron,sans-serif;font-size:1.5rem;font-weight:700}.wrong-book{width:100%;background:#0f172a99;border:1px solid var(--border-color);border-radius:16px;padding:16px;max-height:200px;display:flex;flex-direction:column}.wrong-title{display:flex;align-items:center;gap:8px;font-size:1rem;color:var(--pink);margin-bottom:12px;border-bottom:1px solid rgba(236,72,153,.2);padding-bottom:8px}.wrong-list{overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding-right:4px}.wrong-list::-webkit-scrollbar{width:4px}.wrong-list::-webkit-scrollbar-thumb{background:var(--pink);border-radius:4px}.wrong-item{background:#0000004d;padding:10px;border-radius:8px;border-left:3px solid var(--red);display:flex;justify-content:space-between;align-items:center;font-size:.9rem}.w-q{font-weight:700;color:#fff}.w-ans{display:flex;flex-direction:column;align-items:flex-end;font-size:.8rem}.w-correct{color:var(--green)}.w-yours{color:var(--red);text-decoration:line-through}.empty-state{text-align:center;color:var(--text-muted);padding:20px 0}.mini-wrong-preview{display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--text-muted);background:#0000004d;padding:6px 12px;border-radius:20px}.text-cyan{color:var(--cyan)}.text-yellow{color:var(--yellow)}.text-pink{color:var(--pink)}.text-green{color:var(--green)}.cloud-badge{position:absolute;top:-12px;background:#1e293b;border:1px solid var(--border-color);padding:4px 10px;border-radius:20px;font-size:.75rem;color:var(--cyan);display:flex;align-items:center;gap:4px;box-shadow:0 4px 6px #0000004d;z-index:10}.game-wrapper .cloud-badge{position:static;margin-top:8px;background:transparent;border:none;box-shadow:none;opacity:.7}.spin{animation:spin 2s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes blink{50%{opacity:0}}.pulse-anim{animation:pulse 1.5s ease-in-out infinite alternate}@keyframes pulse{0%{transform:scale(.95);opacity:.8}to{transform:scale(1.05);opacity:1}}.shake-anim{animation:shake .4s cubic-bezier(.36,.07,.19,.97) both}@keyframes shake{10%,90%{transform:translate3d(-2px,0,0)}20%,80%{transform:translate3d(4px,0,0)}30%,50%,70%{transform:translate3d(-6px,0,0)}40%,60%{transform:translate3d(6px,0,0)}}