*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}:root{--bg: #070b14;--bg2: #0d1220;--bg3: #131929;--card: #111827;--border: #1e293b;--border2: #263347;--text: #f1f5f9;--text2: #94a3b8;--text3: #475569;--cyan: #22d3ee;--blue: #3b82f6;--purple: #8b5cf6;--green: #10b981;--orange: #f59e0b;--red: #ef4444;--pink: #ec4899;--radius: 14px;--radius-sm: 8px;--radius-lg: 20px;--shadow: 0 4px 24px rgba(0,0,0,.4);--font: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px)}html{height:100%;font-size:16px}body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}#root{min-height:100%;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button,input,textarea,select{font-family:var(--font);font-size:1rem}button{cursor:pointer;border:none;background:none}input,textarea,select{outline:none;background:var(--bg3);color:var(--text);border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:.75rem 1rem;width:100%;transition:border-color .2s}input:focus,textarea:focus,select:focus{border-color:var(--blue)}textarea{resize:vertical;min-height:100px}h1{font-size:clamp(1.5rem,5vw,2rem);font-weight:700;line-height:1.2}h2{font-size:clamp(1.2rem,4vw,1.5rem);font-weight:700}h3{font-size:1.1rem;font-weight:600}p{color:var(--text2)}.page{flex:1;display:flex;flex-direction:column;max-width:480px;margin:0 auto;width:100%;padding:0 1rem;padding-top:calc(var(--safe-top) + 1rem);padding-bottom:calc(var(--safe-bottom) + 5rem)}.page.wide{max-width:600px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.85rem 1.5rem;border-radius:var(--radius);font-weight:600;font-size:1rem;transition:all .15s;min-height:52px;white-space:nowrap}.btn:active{transform:scale(.97)}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:#2563eb}.btn-danger{background:var(--red);color:#fff}.btn-danger:hover{background:#dc2626}.btn-ghost{background:var(--bg3);color:var(--text2);border:1.5px solid var(--border)}.btn-ghost:hover{border-color:var(--border2);color:var(--text)}.btn-full{width:100%}.tag{display:inline-flex;align-items:center;gap:.3rem;padding:.25rem .65rem;border-radius:999px;font-size:.75rem;font-weight:600;letter-spacing:.02em}.divider{height:1px;background:var(--border);margin:1rem 0}.chip{background:var(--bg3);border:1px solid var(--border);color:var(--text2);font-size:.8rem;padding:.25rem .65rem;border-radius:999px}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-size:.9rem;font-weight:600;color:var(--text2)}.toast{position:fixed;bottom:calc(5.5rem + var(--safe-bottom));left:50%;transform:translate(-50%);z-index:999;background:var(--card);border:1px solid var(--border2);color:var(--text);padding:.75rem 1.25rem;border-radius:var(--radius);font-size:.9rem;font-weight:500;white-space:nowrap;box-shadow:var(--shadow);animation:toastIn .2s ease}.toast.success{border-color:var(--green);color:var(--green)}.toast.error{border-color:var(--red);color:var(--red)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(12px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:100;background:#0d1220f2;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--border);display:flex;padding-bottom:var(--safe-bottom);max-width:480px;margin:0 auto}.bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:.2rem;padding:.7rem 0;color:var(--text3);font-size:.7rem;font-weight:500;transition:color .15s}.bottom-nav a.active{color:var(--blue)}.bottom-nav a svg{width:22px;height:22px;stroke-width:2}.progress-bar{height:4px;background:var(--border);border-radius:99px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:99px;transition:width .35s ease}.top-bar{position:sticky;top:0;z-index:50;background:#070b14e6;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:calc(var(--safe-top) + .65rem) 1rem .65rem;display:flex;align-items:center;gap:.75rem;max-width:480px;margin:0 auto;width:100%}.top-bar h2{font-size:1.05rem;flex:1}.answer-btn{width:100%;text-align:left;background:var(--bg3);border:2px solid var(--border);border-radius:var(--radius);padding:1rem;color:var(--text);font-size:.95rem;line-height:1.5;display:flex;align-items:flex-start;gap:.75rem;transition:all .15s;min-height:56px;cursor:pointer}.answer-btn:active:not(:disabled){transform:scale(.98)}.answer-btn:disabled{cursor:default}.answer-btn.selected{border-color:var(--blue);background:#3b82f61a}.answer-btn.correct{border-color:var(--green);background:#10b9811a;color:#6ee7b7}.answer-btn.wrong{border-color:var(--red);background:#ef44441a;color:#fca5a5}.answer-letter{width:28px;height:28px;flex-shrink:0;border-radius:50%;border:2px solid currentColor;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:var(--text2)}.answer-btn.correct .answer-letter{background:var(--green);border-color:var(--green);color:#fff}.answer-btn.wrong .answer-letter{background:var(--red);border-color:var(--red);color:#fff}.answer-btn.selected .answer-letter{border-color:var(--blue);color:var(--blue)}.tf-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.tf-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;padding:1.5rem 1rem;background:var(--bg3);border:2px solid var(--border);border-radius:var(--radius-lg);color:var(--text);font-size:1rem;font-weight:700;min-height:110px;cursor:pointer;transition:all .15s}.tf-btn:active:not(:disabled){transform:scale(.97)}.tf-btn:disabled{cursor:default}.tf-icon{font-size:2rem}.tf-btn.selected{border-color:var(--blue);background:#3b82f61a}.tf-btn.correct{border-color:var(--green);background:#10b9811a;color:#6ee7b7}.tf-btn.wrong{border-color:var(--red);background:#ef44441a;color:#fca5a5}.explanation{margin-top:.75rem;padding:.9rem 1rem;border-radius:var(--radius);font-size:.9rem;line-height:1.6;border-left:3px solid}.explanation.correct{background:#10b98114;border-color:var(--green);color:#a7f3d0}.explanation.wrong{background:#ef444414;border-color:var(--red);color:#fca5a5}.explanation-label{font-weight:700;font-size:.8rem;letter-spacing:.05em;margin-bottom:.3rem;display:block}.score-ring{position:relative;display:inline-flex;align-items:center;justify-content:center}.score-ring svg{transform:rotate(-90deg)}.score-ring-label{position:absolute;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.q-item{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:.9rem 1rem;display:flex;align-items:flex-start;gap:.75rem}.q-item-body{flex:1;min-width:0}.q-item-text{font-size:.95rem;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.q-item-actions{display:flex;gap:.5rem;flex-shrink:0}.icon-btn{width:40px;height:40px;border-radius:var(--radius-sm);background:var(--bg2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text2);transition:all .15s}.icon-btn:hover{color:var(--text);border-color:var(--border2)}.icon-btn.danger:hover{color:var(--red);border-color:var(--red)}.icon-btn svg{width:17px;height:17px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#000000b3;display:flex;align-items:flex-end;justify-content:center;padding:1rem;animation:fadeIn .15s ease}.modal{background:var(--bg2);border:1px solid var(--border2);border-radius:var(--radius-lg) var(--radius-lg) var(--radius) var(--radius);padding:1.5rem;width:100%;max-width:440px;animation:slideUp .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(40px);opacity:0}to{transform:none;opacity:1}}.home-hero{text-align:center;padding:2.5rem 0 1.5rem}.home-icon{font-size:3.5rem;margin-bottom:1rem}.home-badges{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center}.results-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.result-stat{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:.9rem;text-align:center}.result-stat-num{font-size:1.6rem;font-weight:700}.result-stat-label{font-size:.75rem;color:var(--text3);margin-top:.1rem}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border2);border-radius:99px}@media (min-width: 481px){.top-bar{left:50%;transform:translate(-50%);position:fixed;top:0;width:100%}.page{padding-top:calc(var(--safe-top) + 4rem)}}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--blue);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}