:root{--accent: #00d2ff;--accent-glow: rgba(0, 210, 255, .4);--purple: #9d50bb;--dark: #050510;--glass: rgba(255, 255, 255, .05);--glass-border: rgba(255, 255, 255, .12);--success: #2ed573;--error: #ff4757}*{box-sizing:border-box;margin:0;padding:0}.app-wrap{min-height:100vh;background:var(--dark);color:#fff;font-family:Inter,-apple-system,sans-serif;display:flex;flex-direction:column;position:relative;overflow:hidden}.cosmic-bg{position:absolute;top:0;right:0;bottom:0;left:0;background-size:cover;background-position:center;opacity:.35;filter:saturate(1.2) brightness(.6);z-index:0;transition:background-image 1s ease}.loading-screen{height:100vh;background:var(--dark);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;color:var(--accent);z-index:100}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.app-header{position:relative;z-index:10;padding:24px 32px;display:flex;justify-content:space-between;align-items:center}.cloud-indicator{display:flex;align-items:center;gap:8px;font-size:12px;background:#00d2ff1a;padding:8px 16px;border-radius:30px;border:1px solid rgba(0,210,255,.2);color:var(--accent);font-weight:600}.pulse{animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.top-stats{display:flex;gap:12px}.stat-box{background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:10px 18px;border-radius:14px;border:1px solid var(--glass-border);display:flex;align-items:center;gap:10px;font-weight:800;box-shadow:0 4px 15px #0000004d}.main-stage{flex:1;position:relative;z-index:5;display:flex;justify-content:center;align-items:center;padding:20px}.glass-card{width:100%;max-width:520px;background:#0f0f1ebf;-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);border-radius:32px;padding:40px;border:1px solid var(--glass-border);box-shadow:0 30px 60px #0009;text-align:center}.hero-visual img{width:180px;height:180px;object-fit:contain;filter:drop-shadow(0 0 30px var(--accent-glow));margin-bottom:25px;animation:float 6s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(5deg)}}h1{font-size:32px;font-weight:900;margin-bottom:12px;background:linear-gradient(to right,#fff,var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.5px}.desc{color:#aaa;margin-bottom:35px;line-height:1.6;font-size:16px}.start-btn{background:linear-gradient(135deg,var(--accent),var(--purple));color:#fff;border:none;padding:18px 45px;border-radius:20px;font-size:18px;font-weight:800;cursor:pointer;display:flex;align-items:center;gap:12px;margin:0 auto;transition:all .4s cubic-bezier(.175,.885,.32,1.275)}.start-btn:hover{transform:scale(1.05) translateY(-5px);box-shadow:0 15px 35px var(--accent-glow)}.quiz-progress{display:flex;align-items:center;gap:15px;margin-bottom:30px}.progress-track{flex:1;height:6px;background:#ffffff14;border-radius:10px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(to right,var(--accent),var(--purple));box-shadow:0 0 15px var(--accent-glow)}.q-index{font-size:14px;font-weight:700;color:#666;font-variant-numeric:tabular-nums}.question-text{font-size:22px;text-align:left;margin-bottom:30px;line-height:1.5;font-weight:700;color:#fff}.options-grid{display:flex;flex-direction:column;gap:12px}.opt-btn{background:#ffffff0a;border:1px solid var(--glass-border);padding:18px 24px;border-radius:18px;color:#fff;text-align:left;font-size:16px;cursor:pointer;display:flex;align-items:center;gap:15px;transition:.3s}.opt-letter{width:32px;height:32px;background:#ffffff14;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:14px;color:var(--accent)}.opt-btn:hover:not(:disabled){background:#ffffff14;border-color:var(--accent);transform:translate(5px)}.opt-btn.is-correct{background:#2ed57326!important;border-color:var(--success)!important}.opt-btn.is-wrong{background:#ff475726!important;border-color:var(--error)!important}.feedback-area{margin-top:25px;text-align:left;background:#ffffff08;padding:20px;border-radius:20px;border:1px solid var(--glass-border);overflow:hidden}.status-tag{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:800;margin-bottom:8px}.status-tag.success{color:var(--success)}.status-tag.fail{color:var(--error)}.explanation{font-size:14px;color:#ccc;line-height:1.6;margin-bottom:20px}.continue-btn{width:100%;padding:14px;border-radius:14px;border:none;background:#fff;color:#000;font-weight:800;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:.3s}.continue-btn:hover{background:var(--accent);transform:translateY(-2px)}.result-icon img{width:140px;height:140px;margin-bottom:20px;filter:drop-shadow(0 0 20px gold)}.score-hero{margin:25px 0}.score-num{font-size:72px;font-weight:950;color:var(--accent);display:block;line-height:1;text-shadow:0 0 30px var(--accent-glow)}.score-label{font-size:11px;letter-spacing:4px;color:#555;margin-top:12px;display:block;font-weight:700}.action-row{display:flex;flex-direction:column;gap:12px}.btn-primary{background:var(--accent);color:#000;border:none;padding:16px;border-radius:16px;font-weight:800;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:.3s}.btn-secondary{background:var(--glass);color:#fff;border:1px solid var(--glass-border);padding:16px;border-radius:16px;font-weight:800;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:.3s}.btn-primary:hover,.btn-secondary:hover{transform:translateY(-3px);filter:brightness(1.1)}.app-footer{position:relative;z-index:10;padding:20px;display:flex;justify-content:center;gap:30px;border-top:1px solid var(--glass-border);background:#0003}.footer-item{font-size:12px;color:#555;display:flex;align-items:center;gap:6px;font-weight:500}