:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{background:#f0f4f8;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#1f2937;margin:0;padding:2rem}.quiz-container{background:#fff;padding:2.5rem;border-radius:1.25rem;box-shadow:0 10px 25px #0000001a;max-width:700px;margin:2rem auto;transition:all .3s ease}.question-title{font-size:1.75rem;margin-bottom:1rem;font-weight:700;color:#111827}.question-text{background:#f3f4f6;padding:1rem;border-radius:.5rem;border:1px solid #e5e7eb;margin-bottom:1.5rem;font-size:1.1rem;color:#1f2937}.answers button{display:block;width:100%;margin-bottom:.75rem;padding:.75rem;border-radius:.5rem;border:1px solid #d1d5db;background-color:#f9fafb;transition:background-color .2s,border-color .2s;text-align:left;font-size:1rem;color:#111827}.answers button:hover{background-color:#e0f2fe}.answers button.correct{background-color:#dcfce7;border-color:#22c55e;color:#065f46}.answers button.wrong{background-color:#fee2e2;border-color:#ef4444;color:#991b1b}.feedback{text-align:center;font-weight:600;margin-top:1rem;color:#374151}.controls{display:flex;justify-content:flex-end;margin-top:2rem;gap:1rem}.controls button{background-color:#3b82f6;color:#fff;padding:.6rem 1.2rem;border-radius:.5rem;border:none;cursor:pointer;font-weight:500;transition:background-color .3s}.controls button:hover{background-color:#2563eb}.progress-bar{height:6px;background-color:#60a5fa;border-radius:6px;margin-bottom:1.5rem}button.selected{background-color:#d0ebff;border:2px solid #339af0}button.correct{background-color:#d3f9d8;border:2px solid #37b24d}button.wrong{background-color:#ffe3e3;border:2px solid #fa5252}button:hover:not(:disabled){cursor:pointer;filter:brightness(1.05)}.stats{margin-top:2rem;text-align:left;background:#f8f9fa;padding:1rem;border-radius:8px}.stats ul{list-style:none;padding-left:0}.stats li{margin-bottom:.5rem}