@import"https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700&family=Noto+Sans+SC:wght@400;700&display=swap";:root{--bg: #0B0C10;--surface: #1F2833;--primary: #66FCF1;--primary-dark: #45A29E;--text: #C5C6C7;--success: #4CAF50;--danger: #F44336;--warning: #FFC107;--radius: 12px;--font-main: "Noto Sans SC", sans-serif;--font-title: "Orbitron", sans-serif}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-main);display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden}#root{width:100%;height:100%;display:flex;justify-content:center;align-items:center}.app-container{position:relative;width:100%;max-width:480px;height:85vh;background:var(--surface);border-radius:var(--radius);box-shadow:0 0 30px #66fcf11a;padding:20px;display:flex;flex-direction:column;overflow:hidden;border:1px solid #2a3644}.cloud-badge{position:absolute;top:10px;right:10px;font-size:12px;color:var(--primary);background:#66fcf11a;padding:4px 8px;border-radius:20px;z-index:10;border:1px solid var(--primary)}.screen{display:flex;flex-direction:column;align-items:center;width:100%;height:100%}.neon-title{font-family:var(--font-title);color:var(--primary);text-shadow:0 0 10px var(--primary);margin-bottom:10px;text-align:center}.high-score{display:flex;align-items:center;gap:8px;font-size:1.2rem;color:var(--warning);margin-bottom:30px;font-family:var(--font-title)}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;width:100%;margin-bottom:30px}.subject-btn{background:#ffffff0d;border:1px solid var(--primary-dark);border-radius:var(--radius);padding:20px 10px;color:var(--text);display:flex;flex-direction:column;align-items:center;gap:10px;cursor:pointer;transition:.3s}.subject-btn:hover{background:#66fcf11a;border-color:var(--primary);box-shadow:0 0 15px #66fcf14d;color:var(--primary)}.action-row{display:flex;gap:15px;width:100%;justify-content:center;margin-top:auto;padding-bottom:20px}.btn-primary,.btn-secondary{padding:12px 24px;border-radius:8px;border:none;cursor:pointer;font-weight:700;display:flex;align-items:center;gap:8px;transition:.2s;font-family:var(--font-main)}.btn-primary{background:var(--primary);color:var(--bg);box-shadow:0 0 10px var(--primary)}.btn-primary:hover{background:#fff;box-shadow:0 0 20px var(--primary)}.btn-secondary{background:transparent;border:1px solid var(--text);color:var(--text)}.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}.top-bar{display:flex;justify-content:space-between;width:100%;margin-bottom:15px;align-items:center}.btn-icon{background:none;border:none;color:var(--text);cursor:pointer}.score-display{font-family:var(--font-title);color:var(--primary);font-size:1.2rem}.progress-bg{width:100%;height:6px;background:#ffffff1a;border-radius:3px;margin-bottom:20px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);transition:width .3s;box-shadow:0 0 8px var(--primary)}.question-box{position:relative;width:100%;padding:30px 20px;margin-bottom:20px;display:flex;justify-content:center;align-items:center;min-height:120px}.q-bg{position:absolute;top:0;left:0;z-index:0}.q-text{position:relative;z-index:1;font-size:1.4rem;text-align:center;margin:0;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.5)}.options-grid{display:flex;flex-direction:column;gap:12px;width:100%}.opt-btn{background:#ffffff0d;border:1px solid #444;padding:16px;border-radius:8px;color:var(--text);font-size:1.1rem;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:.2s}.opt-btn:hover{border-color:var(--primary)}.opt-btn.correct{background:#4caf5033;border-color:var(--success);color:#fff}.opt-btn.wrong{background:#f4433633;border-color:var(--danger);color:#fff}.icon-right{color:var(--success);font-weight:700}.icon-wrong{color:var(--danger);font-weight:700}.feedback-box{margin-top:20px;text-align:center;display:flex;flex-direction:column;gap:15px;align-items:center}.fb-msg{font-size:1.5rem;font-weight:700;font-family:var(--font-title)}.text-green{color:var(--success);text-shadow:0 0 8px var(--success)}.text-red{color:var(--danger);text-shadow:0 0 8px var(--danger)}.text-highlight{color:var(--primary);font-size:1.5em}.stat-card{background:#0003;padding:20px;border-radius:var(--radius);border:1px solid #333;width:100%;text-align:center;margin-bottom:30px}.btn-back{align-self:flex-start;background:none;border:none;color:var(--text);cursor:pointer;display:flex;align-items:center;margin-bottom:10px}.list-container{width:100%;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding-right:5px}.list-item{background:#ffffff08;padding:12px;border-radius:8px;border-left:3px solid var(--danger)}.q-text-small{font-weight:700;margin:0 0 5px;color:#fff}.chart-box{display:flex;align-items:flex-end;justify-content:space-around;width:100%;height:200px;background:#0003;padding:20px 10px;border-radius:var(--radius);border:1px solid #333}.bar-col{display:flex;flex-direction:column;align-items:center;gap:10px;height:100%;justify-content:flex-end}.bar-bg{width:30px;height:150px;background:#ffffff0d;border-radius:4px;display:flex;align-items:flex-end}.bar-fill{width:100%;background:linear-gradient(to top,var(--primary-dark),var(--primary));border-radius:4px;box-shadow:0 0 10px #66fcf180}.bar-label{font-size:.8rem;color:#888}.toast{position:fixed;bottom:30px;background:var(--primary);color:var(--bg);padding:10px 20px;border-radius:20px;font-weight:700;box-shadow:0 4px 15px #66fcf166;z-index:1000}.calc-toggle{position:absolute;bottom:20px;right:20px;width:50px;height:50px;border-radius:25px;background:var(--primary);color:var(--bg);border:none;cursor:pointer;box-shadow:0 0 15px var(--primary);display:flex;justify-content:center;align-items:center;z-index:50}.calculator-panel{position:absolute;bottom:80px;right:20px;width:280px;background:#111;border:1px solid var(--primary-dark);border-radius:16px;padding:15px;box-shadow:0 10px 30px #000c;z-index:100;display:flex;flex-direction:column;gap:10px}.calc-close{align-self:flex-end;background:none;border:none;color:#888;cursor:pointer}.calc-history{height:60px;font-size:.8rem;color:#666;text-align:right;overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end;font-family:monospace}.calc-display{font-size:2rem;color:#fff;text-align:right;padding:10px;background:#222;border-radius:8px;font-family:var(--font-title);overflow:hidden;text-overflow:ellipsis}.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.calc-key{background:#333;border:none;border-radius:8px;padding:15px 0;color:#fff;font-size:1.2rem;cursor:pointer;transition:.1s;font-family:var(--font-main)}.calc-key:active{background:#555;transform:scale(.95)}.calc-key.op{background:var(--primary-dark);color:var(--bg);font-weight:700}.calc-key.zero{grid-column:span 2}