@import"https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;700&family=Rajdhani:wght@500;600;700&display=swap";:root{--bg: #0A0A0F;--surface: #15151D;--primary: #F97316;--primary-dark: #EA580C;--accent: #FB923C;--text: #FAFAFA;--text-muted: #A1A1AA;--border: #27272A;--success: #22C55E;--warning: #F59E0B;--danger: #EF4444;--radius: 4px;--shadow: 0 12px 36px rgba(0,0,0,.4), 0 0 28px #F9731626}*{margin:0;padding:0;box-sizing:border-box}body{background:linear-gradient(135deg,#0a0a0f,#15151d),repeating-linear-gradient(0deg,transparent,transparent 49px,#F973160a 50px);color:var(--text);font-family:IBM Plex Sans,Inter,-apple-system,sans-serif;min-height:100vh;overflow-x:hidden}.app-container{max-width:520px;margin:0 auto;min-height:100vh;padding:16px 12px 24px;position:relative;display:flex;flex-direction:column;align-items:center}.bg-layer{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;opacity:.18;pointer-events:none}.bg-img{width:100%;height:100%;object-fit:cover}.bg-fallback{width:100%;height:100%;background:radial-gradient(ellipse at 30% 40%,#F9731615 0%,transparent 70%)}.cloud-badge{position:absolute;top:10px;right:12px;font-size:11px;color:var(--text-muted);background:#15151db3;padding:2px 8px;border-radius:20px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid var(--border);z-index:10}.start-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;z-index:1;gap:18px;text-align:center}.start-icon img{width:64px;height:64px;border-radius:50%;border:2px solid var(--primary);box-shadow:0 0 20px #f9731640}.title{font-family:Rajdhani,IBM Plex Sans,sans-serif;font-size:32px;font-weight:700;text-shadow:0 0 20px var(--accent),0 0 40px #F9731630;letter-spacing:1px}.subtitle{color:var(--text-muted);font-size:14px}.start-highscore{display:flex;align-items:center;gap:6px;background:#f59e0b1a;border:1px solid #F59E0B30;padding:6px 16px;border-radius:var(--radius);font-size:14px;color:var(--warning)}.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:var(--text);border:none;padding:12px 32px;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;box-shadow:0 0 24px var(--primary),0 4px 12px #f973164d;transition:background .15s}.btn-primary:hover{background:var(--primary-dark)}.game-screen{width:100%;z-index:1;padding-top:6px}.hud{display:flex;justify-content:space-between;align-items:center;background:#15151dcc;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px;margin-bottom:8px}.hud-item{display:flex;flex-direction:column;align-items:center;gap:2px}.hud-label{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.hud-value{font-size:14px;font-weight:600;display:flex;align-items:center;gap:4px}.hud-img,.heart-img{width:20px;height:20px;border-radius:2px}.progress-bar-bg{width:100%;height:4px;background:var(--border);border-radius:2px;margin-bottom:6px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:2px;transition:width .4s}.next-rank-hint{font-size:11px;color:var(--text-muted);text-align:center;margin-bottom:10px}.question-card{background:#15151dd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.q-number{font-family:Rajdhani,sans-serif;font-size:13px;color:var(--primary);margin-bottom:6px}.question-text{font-size:17px;font-weight:500;line-height:1.5;margin-bottom:14px}.options-grid{display:flex;flex-direction:column;gap:8px}.option-btn{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);color:var(--text);padding:10px 14px;border-radius:var(--radius);font-size:14px;cursor:pointer;text-align:left;transition:border .15s,background .15s}.option-btn:hover:not(:disabled){border-color:var(--primary);background:#f9731614}.option-correct{border-color:var(--success)!important;background:#22c55e1f!important}.option-wrong{border-color:var(--danger)!important;background:#ef44441f!important}.option-dim{opacity:.5}.option-letter{font-family:Rajdhani,sans-serif;font-weight:700;background:var(--border);border-radius:2px;padding:0 6px;font-size:12px;color:var(--text-muted)}.feedback-badge{margin-top:12px;padding:10px 14px;border-radius:var(--radius);font-weight:600;font-size:15px}.feedback-badge.correct{background:#22c55e26;border:1px solid var(--success)}.feedback-badge.wrong{background:#ef444426;border:1px solid var(--danger)}.explanation{font-weight:400;font-size:12px;color:var(--text-muted);margin-top:4px}.gameover-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;z-index:1;gap:16px;text-align:center}.gameover-icon img{width:72px;height:72px;border-radius:50%;border:2px solid var(--warning);box-shadow:0 0 24px #f59e0b30}.gameover-title{font-family:Rajdhani,sans-serif;font-size:30px;font-weight:700;text-shadow:0 0 12px var(--accent)}.gameover-stats{display:flex;flex-direction:column;gap:8px;background:#15151db3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--border);border-radius:var(--radius);padding:16px 24px}.gameover-stats div{display:flex;justify-content:space-between;gap:40px;font-size:14px}.gameover-stats span:last-child{font-weight:600}.rank-img{width:28px;height:28px;vertical-align:middle}.new-record{color:var(--warning);font-weight:700;font-size:16px;animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}