:root{--primary-color:#6366f1;--primary-hover:#4f46e5;--bg-color:#0f172a;--card-bg:#1e293bb3;--text-main:#f8fafc;--text-muted:#94a3b8;--correct:#22c55e;--incorrect:#ef4444;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;color:var(--text-main);background-color:var(--bg-color);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;font-weight:400;line-height:1.5}body{background:radial-gradient(circle at top left, #1e1b4b, var(--bg-color));box-sizing:border-box;place-items:center;min-width:320px;min-height:100vh;margin:0;padding:1rem;display:flex}#root{text-align:center;width:100%;max-width:800px;margin:0 auto}*{box-sizing:border-box}.glass-card{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);border:1px solid #ffffff1a;border-radius:16px;padding:2.5rem;transition:transform .3s,box-shadow .3s;box-shadow:0 4px 30px #0000004d}h1{background:-webkit-linear-gradient(45deg,#a855f7,#6366f1);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:.5rem;font-size:2.5rem;font-weight:800}h2{margin-bottom:1rem;font-size:1.8rem;font-weight:600}p.subtitle{color:var(--text-muted);margin-bottom:2rem;font-size:1.1rem}.topics-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;display:grid}.topic-card{cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;min-height:120px;padding:1.5rem;transition:all .3s;display:flex}.topic-card:hover{border-color:var(--primary-color);background:#ffffff1a;transform:translateY(-5px);box-shadow:0 10px 20px #6366f133}.topic-card h3{color:var(--text-main);margin:0 0 .5rem;font-size:1.3rem}.topic-card p{color:var(--text-muted);margin:0;font-size:.85rem}.btn{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;margin-top:1rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:background-color .2s,transform .1s}.btn:hover{background-color:var(--primary-hover)}.btn:active{transform:scale(.98)}.progress-bar-container{background:#ffffff1a;border-radius:4px;width:100%;height:8px;margin-bottom:1.5rem;overflow:hidden}.progress-bar{background:var(--primary-color);height:100%;transition:width .3s}.question-text{text-align:left;margin-bottom:2rem;font-size:1.3rem;line-height:1.4}.options-container{flex-direction:column;gap:.75rem;display:flex}.option-btn{color:var(--text-main);cursor:pointer;text-align:left;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:8px;justify-content:space-between;align-items:center;padding:1rem 1.5rem;font-size:1rem;transition:all .2s;display:flex}.option-btn:hover:not(:disabled){background:#ffffff1a;transform:translate(5px)}.option-btn.correct{color:#fff;border-color:var(--correct)!important;background:#22c55e33!important}.option-btn.incorrect{color:#fff;border-color:var(--incorrect)!important;background:#ef444433!important}.option-btn:disabled{cursor:not-allowed;opacity:.9}.score-circle{border:6px solid var(--primary-color);border-radius:50%;justify-content:center;align-items:center;width:150px;height:150px;margin:0 auto 2rem;font-size:2.5rem;font-weight:700;display:flex}.score-details{color:var(--text-muted);margin-bottom:2rem;font-size:1.2rem}.text-left{text-align:left}.flex-between{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.category-badge{color:#a5b4fc;background:#6366f133;border-radius:20px;padding:.25rem .75rem;font-size:.85rem;font-weight:600}.question-counter{color:var(--text-muted);font-size:.9rem;font-weight:500}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.4s forwards fadeIn}.loader{border:4px solid #ffffff1a;border-left-color:var(--primary-color);border-radius:50%;width:40px;height:40px;margin:0 auto;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.header-container{background:var(--card-bg);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid #ffffff1a;border-radius:0 0 16px 16px;justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1rem 2.5rem;display:flex;box-shadow:0 4px 15px #0003}.header-content{align-items:center;gap:.5rem;display:flex}.logo-icon{background:var(--primary-color);color:#fff;border-radius:6px;padding:.3rem .6rem;font-size:1.2rem;font-weight:700}.logo-text{color:var(--text-main);background:-webkit-linear-gradient(45deg,#a855f7,#6366f1);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.5rem;font-weight:700}.nav-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:1px solid #fff3;border-radius:6px;padding:.5rem 1rem;font-weight:600;transition:all .2s}.nav-btn:hover{color:var(--text-main);background:#ffffff1a}.timer-container{color:#fca5a5;background:#ef44441a;border:1px solid #ef44444d;border-radius:20px;align-items:center;gap:.5rem;padding:.4rem .8rem;font-size:.9rem;font-weight:600;display:flex}.timer-icon{animation:1.5s infinite pulse}@keyframes pulse{0%{opacity:1}50%{opacity:.5}to{opacity:1}}.login-split-container{flex-direction:column;gap:2rem;margin-top:1rem;display:flex}@media (width>=768px){.login-split-container{flex-direction:row;justify-content:center;align-items:center;gap:4rem;margin-top:3rem}}.login-left-pane{text-align:left;flex-direction:column;flex:1;justify-content:center;display:flex}.hero-text{background:-webkit-linear-gradient(45deg,#f8fafc,#818cf8);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:1rem;font-size:3rem;line-height:1.1}.hero-subtext{color:var(--text-muted);font-size:1.25rem}.login-right-pane{flex:1;justify-content:center;display:flex}.social-login{flex-direction:column;gap:1rem;margin-bottom:1.5rem;display:flex}.oauth-btn{width:100%;color:var(--text-main);cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:8px;justify-content:center;align-items:center;gap:.75rem;padding:.8rem;font-size:1rem;font-weight:500;transition:all .2s;display:flex}.oauth-btn:hover{background:#ffffff1a;transform:translateY(-2px)}.divider{text-align:center;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;align-items:center;margin:1.5rem 0;font-size:.85rem;display:flex}.divider:before,.divider:after{content:"";border-bottom:1px solid #ffffff1a;flex:1}.divider span{padding:0 1rem}.modern-input{color:#fff;background:#0003;border:1px solid #fff3;border-radius:8px;width:100%;margin-bottom:1.5rem;padding:1rem 1.5rem;font-size:1.1rem;transition:all .3s}.modern-input:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #6366f14d}.animate-slide-up{animation:.4s forwards slideUp}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}