.quiz-container{max-width:600px;margin:0 auto;padding:20px;background:#1e293b;border-radius:24px;box-shadow:0 10px 25px -5px #0000004d,0 8px 10px -6px #0000004d}.header{margin-bottom:24px}.header-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.nav-toggle{background:#334155;color:#94a3b8;border:none;padding:6px 12px;border-radius:8px;font-size:.75rem;font-weight:600;cursor:pointer;transition:all .2s;text-transform:uppercase;letter-spacing:.05em}.nav-toggle:hover{background:#475569;color:#f8fafc}.question-counter{display:block;font-size:.875rem;color:#94a3b8;text-transform:uppercase;letter-spacing:.05em;font-weight:600}.progress-bar{height:6px;background:#334155;border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#3b82f6,#8b5cf6);transition:width .3s ease}.question-card{text-align:left}.question-text{font-size:1.25rem;font-weight:700;color:#f8fafc;line-height:1.4;margin-bottom:24px}.options-grid{display:grid;gap:12px;margin-bottom:24px}.option-button{background:#334155;border:2px solid transparent;border-radius:12px;padding:16px;color:#e2e8f0;font-size:1rem;text-align:left;cursor:pointer;transition:all .2s}.option-button:hover:not(:disabled){background:#475569}.option-button.selected{border-color:#3b82f6;background:#1e293b;box-shadow:0 0 0 4px #3b82f61a}.option-button.correct-highlight{background:#22c55e33;border-color:#22c55e}.option-button.wrong-highlight{background:#ef444433;border-color:#ef4444}.feedback{display:flex;align-items:center;gap:12px;padding:16px;border-radius:12px;margin-bottom:24px;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.feedback.success{background:#22c55e1a;color:#4ade80}.feedback.error{background:#ef44441a;color:#f87171}.feedback .icon{font-size:1.5rem;font-weight:700}.feedback .message{font-size:1.1rem;font-weight:600}.actions{display:flex;justify-content:flex-end}.primary-button{background:#3b82f6;color:#fff;border:none;padding:12px 24px;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s}.primary-button:hover:not(:disabled){background:#2563eb}.primary-button:disabled{opacity:.5;cursor:not-allowed}.result-card{padding:48px 24px}.final-score{font-size:1.5rem;color:#f8fafc;margin:24px 0 12px}.stats-container{margin-bottom:32px}.stats-details{display:flex;justify-content:center;gap:20px;margin-bottom:24px}.stat-item{font-size:1.1rem;font-weight:600;padding:8px 16px;border-radius:8px}.stat-item.success{background:#22c55e1a;color:#4ade80}.stat-item.error{background:#ef44441a;color:#f87171}.errors-list h3{font-size:1rem;color:#94a3b8;margin-bottom:12px}.error-badges{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.error-badge{background:#ef444433;color:#f87171;padding:4px 12px;border-radius:6px;font-weight:600;cursor:pointer;transition:transform .2s}.error-badge:hover{transform:scale(1.1);background:#ef44444d}.result-actions{display:flex;gap:12px;justify-content:center;margin-top:24px}.primary-button.secondary{background:#475569}.primary-button.secondary:hover{background:#64748b}.original-num{opacity:.6;font-size:.85em;margin-left:4px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:20px}.modal-content{background:#1e293b;width:100%;max-width:450px;border-radius:24px;padding:24px;box-shadow:0 20px 25px -5px #00000080;animation:modalIn .3s ease-out}@keyframes modalIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.modal-header h3{margin:0;color:#f8fafc;font-size:1.25rem}.close-button{background:none;border:none;color:#94a3b8;font-size:2rem;cursor:pointer;line-height:1}.close-button:hover{color:#f8fafc}.question-navigation-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:12px;max-height:60vh;overflow-y:auto;padding-right:8px}.question-navigation-grid::-webkit-scrollbar{width:6px}.question-navigation-grid::-webkit-scrollbar-track{background:#334155;border-radius:3px}.question-navigation-grid::-webkit-scrollbar-thumb{background:#475569;border-radius:3px}.nav-item{width:100%;aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:#334155;border:2px solid transparent;border-radius:10px;color:#94a3b8;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.nav-item:hover{background:#475569;transform:translateY(-2px)}.nav-item.nav-current{border-color:#3b82f6;color:#f8fafc;background:#1e293b}.nav-item.nav-correct{background:#22c55e;color:#fff}.nav-item.nav-wrong{background:#ef4444;color:#fff}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#0f172a;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;width:100%}*{box-sizing:border-box}