:root{--bg-color:#05070a;--bg-glow:radial-gradient(circle at 50% 50%, #1e1b4b 0%, #05070a 100%);--card-bg:#ffffff08;--card-border:#ffffff1a;--accent-primary:#6366f1;--accent-secondary:#10b981;--accent-tertiary:#f59e0b;--text-main:#f8fafc;--text-muted:#94a3b8;--correct:#10b981;--incorrect:#ef4444;--font-main:"Outfit", "Inter", -apple-system, sans-serif;--transition-base:.3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-color);background-image:var(--bg-glow);color:var(--text-main);font-family:var(--font-main);-webkit-font-smoothing:antialiased;justify-content:center;align-items:center;min-height:100vh;display:flex;overflow-x:hidden}#root{width:100%}.scene-container{flex-direction:column;justify-content:center;align-items:center;width:100%;max-width:540px;min-height:100vh;margin:0 auto;padding:2rem 1rem;display:flex}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.text-center{text-align:center}.w-full{width:100%}.card{background:var(--card-bg);-webkit-backdrop-filter:blur(20px);border:1px solid var(--card-border);border-radius:32px;padding:2.5rem;box-shadow:0 25px 50px -12px #00000080}.hero-title{letter-spacing:-.05em;background:linear-gradient(135deg,#818cf8 0%,#34d399 100%);-webkit-text-fill-color:transparent;filter:drop-shadow(0 10px 15px #6366f133);-webkit-background-clip:text;background-clip:text;margin-bottom:.5rem;font-size:3.5rem;font-weight:900;line-height:1}.btn-primary{background:linear-gradient(135deg, var(--accent-primary) 0%, #4f46e5 100%);color:#fff;letter-spacing:.05em;cursor:pointer;width:100%;transition:var(--transition-base);border:none;border-radius:20px;padding:1.25rem;font-size:1.25rem;font-weight:800;box-shadow:0 10px 20px -5px #6366f166}.btn-primary:hover{transform:translateY(-2px)scale(1.02);box-shadow:0 15px 30px -5px #6366f180}.btn-primary:active{transform:translateY(0)scale(.98)}.choice-btn{width:100%;color:var(--text-main);text-align:left;cursor:pointer;transition:var(--transition-base);background:#ffffff0d;border:1px solid #ffffff1a;border-radius:20px;justify-content:space-between;align-items:center;padding:1.5rem;font-size:1.1rem;font-weight:700;display:flex}.choice-btn:hover:not(:disabled){border-color:var(--accent-primary);background:#ffffff1a;transform:translate(4px)}.choice-btn:disabled{opacity:.5;cursor:not-allowed}.stats-grid{grid-template-columns:repeat(2,1fr);gap:1rem;width:100%;display:grid}.stat-box{background:#ffffff08;border:1px solid #ffffff0d;border-radius:24px;flex-direction:column;align-items:center;padding:1.5rem;display:flex}.grade-display{text-shadow:0 10px 40px #6366f166;margin:1rem 0;font-size:8rem;font-style:italic;font-weight:900;line-height:1}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.6s cubic-bezier(.22,1,.36,1) forwards fadeIn}.pulse{animation:2s ease-in-out infinite pulse-kf}@keyframes pulse-kf{0%,to{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(1.02)}}.shake{animation:.4s ease-in-out shake-kf}@keyframes shake-kf{0%,to{transform:translate(0)}25%{transform:translate(-10px)}75%{transform:translate(10px)}}