:root{--neon-blue: #00f2ff;--neon-purple: #bc13fe;--bg-dark: #0a0b1e;--glass: rgba(255, 255, 255, .05)}.app-container{min-height:100vh;background-color:var(--bg-dark);background-size:cover;background-position:center;color:#fff;font-family:Inter,system-ui,sans-serif;position:relative;overflow:hidden}.glass-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at center,transparent,var(--bg-dark));-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:0}.main-header{position:relative;z-index:10;padding:20px 40px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.1)}.logo{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:2px;font-size:1.2rem}.icon-neon{color:var(--neon-blue);filter:drop-shadow(0 0 8px var(--neon-blue))}.cloud-tag{background:#00f2ff1a;padding:4px 12px;border-radius:20px;font-size:.8rem;color:var(--neon-blue);display:flex;align-items:center;gap:6px}.content{position:relative;z-index:10;max-width:800px;margin:40px auto;padding:0 20px}.hero{text-align:center}.tutor-box{background:var(--glass);padding:40px;border-radius:24px;border:1px solid rgba(255,255,255,.1);margin-bottom:30px}.tutor-img{width:120px;height:120px;border-radius:50%;margin-bottom:20px;border:3px solid var(--neon-purple);box-shadow:0 0 20px var(--neon-purple)}.menu-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.menu-card{padding:30px;border-radius:20px;border:none;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:15px;font-size:1.1rem;font-weight:600;transition:all .3s;color:#fff}.menu-card.primary{background:linear-gradient(135deg,#0061ff,#60efff);box-shadow:0 10px 30px #0061ff4d}.menu-card.secondary{background:var(--glass);border:1px solid rgba(255,255,255,.2)}.menu-card:hover{transform:translateY(-5px);filter:brightness(1.2)}.quiz-box{background:var(--glass);padding:30px;border-radius:24px;border:1px solid rgba(255,255,255,.1)}.progress-bar{height:6px;background:#ffffff1a;border-radius:3px;margin-bottom:20px;overflow:hidden}.progress-fill{height:100%;background:var(--neon-blue);transition:width .3s}.q-badge{background:var(--neon-purple);padding:2px 8px;border-radius:4px;font-size:.7rem;font-weight:700}.question-text{font-size:1.4rem;margin:20px 0 30px;line-height:1.5}.options-list{display:flex;flex-direction:column;gap:12px}.opt-btn{padding:16px 24px;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:12px;color:#fff;text-align:left;cursor:pointer;transition:all .2s}.opt-btn:hover{background:#ffffff1a}.opt-btn.active{background:#00f2ff33;border-color:var(--neon-blue);box-shadow:0 0 15px #00f2ff33}.code-editor{background:#1e1e1e;border-radius:12px;overflow:hidden;border:1px solid #333}.editor-header{background:#2d2d2d;padding:8px 16px;font-size:.8rem;color:#aaa;display:flex;align-items:center;gap:8px}.code-editor textarea{width:100%;height:250px;background:transparent;border:none;color:#d4d4d4;padding:15px;font-family:Fira Code,monospace;font-size:.9rem;resize:none;outline:none}.nav-btns{margin-top:30px;display:flex;justify-content:space-between;gap:15px}.nav-btns button{padding:12px 24px;border-radius:10px;border:none;cursor:pointer;font-weight:600}.next-btn,.submit-btn{background:var(--neon-blue);color:#000;flex:1}.submit-btn:disabled{opacity:.5;cursor:not-allowed}.result-card{text-align:center;padding:60px}.trophy-icon{color:gold;filter:drop-shadow(0 0 20px rgba(255,215,0,.5));margin-bottom:20px}.mistakes-view{background:var(--glass);padding:30px;border-radius:24px}.view-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.mistake-item{background:#ffffff08;padding:20px;border-radius:12px;margin-bottom:15px;border-left:4px solid #ff4757}.m-q{font-weight:600;margin-bottom:10px}.m-a{color:#2ed573;font-size:.9rem}.clear-btn{background:transparent;color:#ff4757;border:1px solid #ff4757;padding:8px 16px;border-radius:8px;cursor:pointer;margin-top:20px}