@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";:root{--bg-primary: #0a0e1a;--bg-secondary: #111827;--bg-card: #1a2235;--bg-glass: rgba(26, 34, 53, .8);--border: rgba(99, 130, 255, .15);--border-hover: rgba(99, 130, 255, .4);--accent: #6366f1;--accent-light: #818cf8;--accent-glow: rgba(99, 102, 241, .3);--success: #10b981;--success-bg: rgba(16, 185, 129, .1);--danger: #ef4444;--danger-bg: rgba(239, 68, 68, .1);--warning: #f59e0b;--warning-bg: rgba(245, 158, 11, .1);--text-primary: #f1f5f9;--text-secondary:#94a3b8;--text-muted: #64748b;--radius: 12px;--radius-lg: 18px;--shadow: 0 4px 24px rgba(0,0,0,.4);--shadow-lg: 0 8px 40px rgba(0,0,0,.5);--transition: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:Inter,system-ui,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6}a{color:var(--accent-light);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--accent)}.app-wrapper{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:transform .3s ease}.sidebar-logo{padding:24px 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--border)}.sidebar-logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--accent),#a855f7);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px}.sidebar-logo-text{font-size:1.2rem;font-weight:700}.sidebar-logo-text span{color:var(--accent-light)}.sidebar-nav{flex:1;padding:16px 0;overflow-y:auto}.nav-section-label{padding:8px 20px;font-size:.7rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted)}.nav-item{display:flex;align-items:center;gap:12px;padding:11px 20px;margin:2px 10px;border-radius:var(--radius);color:var(--text-secondary);font-size:.9rem;font-weight:500;transition:all var(--transition);cursor:pointer}.nav-item:hover,.nav-item.active{background:var(--accent-glow);color:var(--text-primary);border:1px solid var(--border-hover)}.nav-item.active{color:var(--accent-light)}.nav-item .nav-icon{font-size:1.1rem;width:20px;text-align:center}.sidebar-footer{padding:16px;border-top:1px solid var(--border)}.main-content{margin-left:260px;flex:1;display:flex;flex-direction:column;min-height:100vh}.topbar{height:64px;background:var(--bg-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:50}.topbar-title{font-size:1.1rem;font-weight:600}.topbar-user{display:flex;align-items:center;gap:10px}.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#a855f7);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem}.page-content{padding:28px;flex:1}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:border-color var(--transition),box-shadow var(--transition)}.card:hover{border-color:var(--border-hover);box-shadow:var(--shadow)}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.card-title{font-size:1.05rem;font-weight:600}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;display:flex;align-items:center;gap:16px;transition:all var(--transition)}.stat-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}.stat-icon{width:50px;height:50px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.4rem}.stat-icon.purple{background:#6366f126}.stat-icon.green{background:#10b98126}.stat-icon.blue{background:#3b82f626}.stat-icon.orange{background:#f59e0b26}.stat-value{font-size:1.8rem;font-weight:700;line-height:1}.stat-label{font-size:.8rem;color:var(--text-muted);margin-top:4px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.9rem}thead tr{border-bottom:1px solid var(--border)}th{padding:12px 16px;text-align:left;color:var(--text-muted);font-weight:500;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}td{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.03)}tbody tr:hover{background:#ffffff05}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:.875rem;font-weight:600;border:none;cursor:pointer;transition:all var(--transition);text-decoration:none;font-family:inherit}.btn-primary{background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff;box-shadow:0 4px 15px var(--accent-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px var(--accent-glow);color:#fff}.btn-success{background:var(--success-bg);color:var(--success);border:1px solid rgba(16,185,129,.3)}.btn-success:hover{background:var(--success);color:#fff}.btn-danger{background:var(--danger-bg);color:var(--danger);border:1px solid rgba(239,68,68,.3)}.btn-danger:hover{background:var(--danger);color:#fff}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover{border-color:var(--border-hover);color:var(--text-primary)}.btn-sm{padding:6px 14px;font-size:.8rem}.btn-lg{padding:14px 28px;font-size:1rem}.form-group{margin-bottom:20px}.form-label{display:block;margin-bottom:6px;font-size:.875rem;font-weight:500;color:var(--text-secondary)}.form-control{width:100%;padding:11px 16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:.9rem;font-family:inherit;transition:border-color var(--transition),box-shadow var(--transition);outline:none}.form-control:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.form-control::placeholder{color:var(--text-muted)}textarea.form-control{resize:vertical;min-height:80px}select.form-control option{background:var(--bg-secondary)}.form-error{font-size:.8rem;color:var(--danger);margin-top:4px}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:100px;font-size:.75rem;font-weight:600}.badge-success{background:var(--success-bg);color:var(--success)}.badge-danger{background:var(--danger-bg);color:var(--danger)}.badge-warning{background:var(--warning-bg);color:var(--warning)}.badge-accent{background:var(--accent-glow);color:var(--accent-light)}.badge-muted{background:#ffffff0d;color:var(--text-muted)}.alert{padding:14px 18px;border-radius:var(--radius);margin-bottom:20px;border:1px solid;font-size:.9rem;display:flex;align-items:flex-start;gap:10px}.alert-success{background:var(--success-bg);border-color:#10b9814d;color:var(--success)}.alert-danger{background:var(--danger-bg);border-color:#ef44444d;color:var(--danger)}.alert-warning{background:var(--warning-bg);border-color:#f59e0b4d;color:var(--warning)}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.page-header h1{font-size:1.6rem;font-weight:700}.page-header p{color:var(--text-muted);font-size:.9rem;margin-top:4px}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state .empty-icon{font-size:3rem;margin-bottom:12px}.empty-state h3{font-size:1.1rem;color:var(--text-secondary);margin-bottom:8px}.exam-header{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 28px;display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;position:sticky;top:64px;z-index:40;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.countdown-display{display:flex;align-items:center;gap:12px}.countdown-timer{font-size:2rem;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:2px;color:var(--success);transition:color .5s}.countdown-timer.warning{color:var(--warning)}.countdown-timer.danger{color:var(--danger);animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:16px;transition:border-color var(--transition)}.question-number{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--accent-glow);border:1px solid var(--accent);border-radius:8px;font-size:.85rem;font-weight:700;color:var(--accent-light);margin-bottom:12px}.question-text{font-size:1rem;font-weight:500;margin-bottom:16px;line-height:1.5}.option-label{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius);border:1px solid var(--border);cursor:pointer;margin-bottom:8px;transition:all var(--transition);font-size:.9rem}.option-label:hover{border-color:var(--accent);background:var(--accent-glow)}.option-label input[type=radio],.option-label input[type=checkbox]{accent-color:var(--accent);width:16px;height:16px}.option-label.selected{border-color:var(--accent);background:var(--accent-glow)}.fill-blank-input{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);padding:12px 16px;font-size:1rem;font-family:inherit;width:100%;outline:none;transition:border-color var(--transition),box-shadow var(--transition)}.fill-blank-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.modal-overlay{position:fixed;inset:0;background:#000c;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:999;opacity:0;pointer-events:none;transition:opacity .3s}.modal-overlay.show{opacity:1;pointer-events:all}.modal-box{background:var(--bg-card);border:1px solid rgba(239,68,68,.4);border-radius:var(--radius-lg);padding:36px;max-width:460px;text-align:center;box-shadow:0 0 60px #ef444433;animation:modalIn .3s ease}@keyframes modalIn{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.modal-icon{font-size:3rem;margin-bottom:16px}.modal-title{font-size:1.3rem;font-weight:700;color:var(--danger);margin-bottom:8px}.modal-message{color:var(--text-secondary);margin-bottom:24px;line-height:1.6}.modal-counter{font-size:1.8rem;font-weight:800;color:var(--danger)}.progress-bar-wrap{background:#ffffff0d;border-radius:100px;height:6px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),#a855f7);border-radius:100px;transition:width .5s ease}.score-circle{width:140px;height:140px;border-radius:50%;background:conic-gradient(var(--accent) var(--pct, 0%),rgba(255,255,255,.05) 0%);display:flex;align-items:center;justify-content:center;margin:0 auto 24px;position:relative}.score-inner{width:110px;height:110px;border-radius:50%;background:var(--bg-card);display:flex;flex-direction:column;align-items:center;justify-content:center}.score-inner .score-num{font-size:1.8rem;font-weight:800}.score-inner .score-denom{font-size:.75rem;color:var(--text-muted)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at top,#1a1040 0%,var(--bg-primary) 60%);position:relative;overflow:hidden}.login-page:before{content:"";position:absolute;width:600px;height:600px;background:radial-gradient(circle,var(--accent-glow) 0%,transparent 70%);top:-200px;left:-200px;pointer-events:none}.login-card{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:24px;padding:48px 40px;width:100%;max-width:420px;box-shadow:var(--shadow-lg);position:relative;z-index:1}.d-flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:8px}.gap-4{gap:16px}.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-4{margin-top:16px}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.text-muted{color:var(--text-muted);font-size:.875rem}.text-danger{color:var(--danger)}.text-success{color:var(--success)}.fw-600{font-weight:600}.fw-700{font-weight:700}.w-full{width:100%}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#6366f14d;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--accent)}@media(max-width:768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.stats-grid{grid-template-columns:1fr 1fr}.menu-btn{display:flex!important}}@media(min-width:769px){.menu-btn{display:none!important}}.login-orb{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none;animation:float 8s ease-in-out infinite}.login-orb-1{width:500px;height:500px;background:radial-gradient(circle,rgba(99,102,241,.25),transparent 70%);top:-150px;left:-150px}.login-orb-2{width:400px;height:400px;background:radial-gradient(circle,rgba(168,85,247,.2),transparent 70%);bottom:-100px;right:-100px;animation-delay:-4s}@keyframes float{0%,to{transform:translateY(0) scale(1)}50%{transform:translateY(-20px) scale(1.05)}}.login-logo-wrap{width:72px;height:72px;background:linear-gradient(135deg,var(--accent),#a855f7);border-radius:20px;display:flex;align-items:center;justify-content:center;margin:0 auto;box-shadow:0 8px 32px var(--accent-glow);animation:logoGlow 3s ease-in-out infinite}@keyframes logoGlow{0%,to{box-shadow:0 8px 32px var(--accent-glow)}50%{box-shadow:0 8px 48px #a855f766}}.btn i{font-size:.9em}.nav-icon i{font-size:1rem}.badge i{font-size:.75em}