:root{--bg-dark:#070b14;--bg-darker:#03060d;--bg-card:#0f172ac7;--bg-card-solid:#0f172a;--bg-card-hover:#1a2642d9;--accent-cyan:#00f2fe;--accent-blue:#3b82f6;--accent-indigo:#6366f1;--accent-purple:#8b5cf6;--accent-green:#10b981;--accent-amber:#f59e0b;--accent-red:#ef4444;--text-main:#f8fafc;--text-muted:#94a3b8;--border-glow:#00f2fe47;--border-glass:#ffffff14;--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--shadow-glow:0 0 30px #00f2fe1f;--font-heading:"Outfit", -apple-system, BlinkMacSystemFont, sans-serif;--font-body:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono:"JetBrains Mono", monospace}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-main);font-family:var(--font-body);-webkit-font-smoothing:antialiased;background-image:radial-gradient(circle at 10% 10%,#00f2fe14 0%,#0000 35%),radial-gradient(circle at 90% 90%,#6366f114 0%,#0000 35%),linear-gradient(90deg,#ffffff05 1px,#0000 1px),linear-gradient(#ffffff05 1px,#0000 1px);background-size:100% 100%,100% 100%,40px 40px,40px 40px;min-height:100vh;line-height:1.6;overflow-x:hidden}::-webkit-scrollbar{width:7px;height:7px}::-webkit-scrollbar-track{background:var(--bg-darker)}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-cyan)}.app-container{flex-direction:column;max-width:1350px;min-height:100vh;margin:0 auto;padding:0 1.5rem 3rem;display:flex}.glass-panel{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-glass);border-radius:var(--radius-md);transition:border-color .25s,box-shadow .25s;box-shadow:0 12px 35px #0006}.glass-panel-glow{border-color:var(--border-glow);box-shadow:var(--shadow-glow)}.app-header{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border:1px solid var(--border-glass);border-radius:var(--radius-md);background:#0b111ed9;justify-content:space-between;align-items:center;margin-top:1.25rem;margin-bottom:2rem;padding:1.1rem 1.5rem;display:flex}.header-brand{align-items:center;gap:1rem;display:flex}.nexus-badge{background:linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));color:#030712;font-weight:800;font-family:var(--font-heading);letter-spacing:2px;text-transform:uppercase;border-radius:5px;padding:.25rem .65rem;font-size:.725rem}.header-title-box h1{font-family:var(--font-heading);background:linear-gradient(90deg,#fff,#a5f3fc);-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:.5rem;font-size:1.35rem;font-weight:700;display:flex}.header-title-box p{color:var(--text-muted);font-size:.825rem}.header-actions{align-items:center;gap:.85rem;display:flex}.status-pill{font-size:.775rem;font-weight:600;font-family:var(--font-heading);letter-spacing:.5px;text-transform:uppercase;border-radius:30px;align-items:center;gap:.4rem;padding:.35rem .85rem;display:inline-flex}.status-pill.waiting{color:#fbbf24;background:#f59e0b1f;border:1px solid #f59e0b4d}.status-pill.active{color:#34d399;background:#10b9811f;border:1px solid #10b98166}.status-pill.ended{color:#f87171;background:#ef44441f;border:1px solid #ef44444d}.pulse-dot{background-color:currentColor;border-radius:50%;width:7px;height:7px;animation:1.8s ease-in-out infinite pulse}@keyframes pulse{0%{opacity:.5;transform:scale(.8)}50%{opacity:1;transform:scale(1.3)}to{opacity:.5;transform:scale(.8)}}.btn{font-family:var(--font-heading);border-radius:var(--radius-sm);cursor:pointer;border:none;justify-content:center;align-items:center;gap:.5rem;padding:.65rem 1.25rem;font-size:.875rem;font-weight:600;text-decoration:none;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex}.btn-primary{color:#030712;background:linear-gradient(135deg,#00f2fe,#3b82f6);box-shadow:0 4px 15px #00f2fe40}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px #00f2fe66}.btn-success{color:#fff;background:linear-gradient(135deg,#10b981,#059669);box-shadow:0 4px 15px #10b98138}.btn-success:hover{transform:translateY(-1px);box-shadow:0 6px 20px #10b98161}.btn-danger{color:#fff;background:linear-gradient(135deg,#ef4444,#dc2626)}.btn-danger:hover{background:linear-gradient(135deg,#f87171,#b91c1c)}.btn-outline{border:1px solid var(--border-glass);color:var(--text-main);background:#ffffff0a}.btn-outline:hover{background:#ffffff14;border-color:#fff3}.btn-tab{color:var(--text-muted);border-radius:var(--radius-sm);background:0 0;padding:.55rem 1.1rem}.btn-tab.active{color:var(--accent-cyan);background:#00f2fe1f;border:1px solid #00f2fe4d}.form-group{flex-direction:column;gap:.4rem;margin-bottom:1.25rem;display:flex}.form-group label{color:var(--text-muted);font-size:.85rem;font-weight:500}.form-control{border-radius:var(--radius-sm);width:100%;color:var(--text-main);font-family:var(--font-body);background:#070b14bf;border:1px solid #ffffff1f;outline:none;padding:.75rem 1rem;font-size:.95rem;transition:border-color .2s,box-shadow .2s}.form-control:focus{border-color:var(--accent-cyan);box-shadow:0 0 0 3px #00f2fe26}.login-card{text-align:center;max-width:480px;margin:2.5rem auto;padding:2.5rem 2.25rem}.login-card .icon-wrapper{width:64px;height:64px;color:var(--accent-cyan);background:#00f2fe1a;border:1px solid #00f2fe4d;border-radius:50%;justify-content:center;align-items:center;margin:0 auto 1.25rem;display:flex;box-shadow:0 0 25px #00f2fe33}.login-card h2{font-family:var(--font-heading);margin-bottom:.5rem;font-size:1.6rem}.login-card p.subtitle{color:var(--text-muted);margin-bottom:1.8rem;font-size:.9rem}.waiting-card{text-align:center;max-width:650px;margin:3rem auto;padding:3rem 2rem}.radar-spinner{justify-content:center;align-items:center;width:100px;height:100px;margin:0 auto 2rem;display:flex;position:relative}.radar-ring{border:2px dashed #00f2fe66;border-radius:50%;animation:12s linear infinite spin;position:absolute;inset:0}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.exam-layout{grid-template-columns:1fr 320px;gap:1.5rem;display:grid}@media (width<=900px){.exam-layout{grid-template-columns:1fr}}.timer-box{border:1px solid var(--border-glass);border-radius:var(--radius-md);background:#0b111ee6;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding:1rem 1.5rem;display:flex}.timer-display{font-family:var(--font-mono);color:var(--accent-cyan);align-items:center;gap:.6rem;font-size:1.5rem;font-weight:700;display:flex}.timer-display.warning{color:var(--accent-red);animation:1s infinite pulse}.question-card{flex-direction:column;min-height:420px;padding:2rem;display:flex}.question-header{border-bottom:1px solid var(--border-glass);justify-content:space-between;align-items:center;margin-bottom:1.25rem;padding-bottom:1rem;display:flex}.category-tag{color:#818cf8;font-size:.75rem;font-family:var(--font-heading);text-transform:uppercase;letter-spacing:.5px;background:#6366f126;border:1px solid #6366f14d;border-radius:4px;padding:.2rem .6rem}.question-text{margin-bottom:1.8rem;font-size:1.15rem;font-weight:600;line-height:1.55}.options-grid{flex-direction:column;gap:.85rem;margin-bottom:2rem;display:flex}.option-item{border:1px solid var(--border-glass);border-radius:var(--radius-sm);cursor:pointer;background:#070b148c;align-items:center;gap:1rem;padding:1rem 1.25rem;transition:all .2s;display:flex}.option-item:hover{background:#00f2fe0d;border-color:#00f2fe4d}.option-item.selected{border-color:var(--accent-cyan);background:#00f2fe1f;box-shadow:0 0 15px #00f2fe26}.option-key{width:32px;height:32px;font-family:var(--font-heading);color:var(--text-muted);background:#ffffff0f;border:1px solid #ffffff26;border-radius:6px;justify-content:center;align-items:center;font-size:.85rem;font-weight:700;display:flex}.option-item.selected .option-key{background:var(--accent-cyan);color:#000;border-color:var(--accent-cyan)}.question-nav-grid{grid-template-columns:repeat(4,1fr);gap:.6rem;margin-top:1rem;display:grid}.q-nav-btn{border:1px solid var(--border-glass);height:42px;color:var(--text-muted);font-family:var(--font-heading);cursor:pointer;background:#ffffff08;border-radius:8px;justify-content:center;align-items:center;font-weight:600;transition:all .15s;display:flex}.q-nav-btn.active{border-color:var(--accent-cyan);box-shadow:0 0 8px #00f2fe4d}.q-nav-btn.answered{color:#34d399;background:#10b98133;border-color:#10b98180}.q-nav-btn.flagged{color:#fbbf24;background:#f59e0b33;border-color:#f59e0b80}.data-table-wrapper{border-radius:var(--radius-sm);border:1px solid var(--border-glass);overflow-x:auto}.data-table{border-collapse:collapse;text-align:left;width:100%;font-size:.9rem}.data-table th{font-family:var(--font-heading);color:var(--text-muted);border-bottom:1px solid var(--border-glass);text-transform:uppercase;letter-spacing:1px;background:#070b14d9;padding:.85rem 1rem;font-size:.75rem;font-weight:600}.data-table td{border-bottom:1px solid #ffffff0a;padding:.9rem 1rem}.data-table tr:hover td{background:#ffffff05}.modal-overlay{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:999;background:#03060dd1;justify-content:center;align-items:center;padding:1.5rem;display:flex;position:fixed;inset:0}.modal-content{border:1px solid var(--border-glow);border-radius:var(--radius-md);background:#0f172a;width:100%;max-width:550px;padding:2rem;box-shadow:0 20px 50px #0009}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:1.5rem;display:grid}.stat-card{border:1px solid var(--border-glass);border-radius:var(--radius-sm);background:#0b111e99;padding:1.25rem}.stat-value{font-family:var(--font-heading);color:var(--accent-cyan);font-size:1.8rem;font-weight:700}.stat-label{color:var(--text-muted);font-size:.8rem}