.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background-color:#0009;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0}.modal-content{background-color:var(--bg-dark);border:1px solid var(--border-color);border-radius:16px;flex-direction:column;width:90%;max-width:600px;max-height:80vh;display:flex;box-shadow:0 20px 40px #00000080}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-header h2{color:var(--text-main);margin:0;font-size:1.2rem}.close-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;font-size:1.2rem;transition:color .2s}.close-btn:hover{color:var(--warning)}.modal-body{flex:1;padding:20px 24px;overflow-y:auto}.log-table{border-collapse:collapse;width:100%}.log-table th,.log-table td{text-align:left;border-bottom:1px solid #ffffff0d;padding:12px 8px}.log-table th{color:var(--text-muted);font-size:.9rem;font-weight:400}.log-table td{color:var(--text-main);font-size:.95rem}.reason-badge{color:var(--primary);background-color:#00ffaa1a;border-radius:6px;padding:4px 8px;font-size:.85rem}.text-positive{font-weight:700;color:#00c49f!important}.text-negative{font-weight:700;color:#ff3b30!important}.text-center{text-align:center;color:var(--text-muted)}.pagination{justify-content:space-between;align-items:center;margin-top:20px;display:flex}.pagination span{color:var(--text-muted)}.loading-text{text-align:center;color:var(--text-muted);padding:40px 0}.cohort-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;margin-top:24px;padding:24px;overflow-x:auto;box-shadow:0 4px 6px #0000001a}.cohort-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.cohort-header h3{color:var(--text-main);margin:0;font-size:1.1rem}.cohort-badge{color:var(--text-muted);background:#ffffff1a;border-radius:20px;padding:4px 10px;font-size:.8rem}.cohort-table-wrapper{overflow-x:auto}.cohort-table{border-collapse:collapse;width:100%;min-width:800px}.cohort-table th,.cohort-table td{text-align:center;border:1px solid #ffffff0d;padding:10px;font-size:.9rem}.cohort-table th{color:var(--text-muted);background:#0003;font-weight:400}.sticky-col{background:var(--bg-card);z-index:1;font-weight:700;position:sticky;left:0;text-align:left!important}.heatmap-cell{color:var(--text-main);cursor:default;transition:opacity .2s}.heatmap-cell:hover{opacity:.8}.empty-cell{color:var(--text-muted);background:#ffffff05}.font-mono{font-family:monospace}.font-bold{font-weight:700}.cohort-loading{text-align:center;color:var(--text-muted);padding:40px}:root{--bg-dark:#0f172a;--bg-panel:#1e293bb3;--border-color:#ffffff1a;--text-main:#f8fafc;--text-muted:#94a3b8;--primary:#3b82f6;--primary-hover:#2563eb;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--accent:#8b5cf6;--input-bg:#ffffff0d;--stat-value:white;--panel-shadow:0 4px 30px #0000004d}:root[data-theme=light]{--bg-dark:#f8fafc;--bg-panel:#ffffffb3;--border-color:#0000001a;--text-main:#0f172a;--text-muted:#64748b;--primary:#2563eb;--primary-hover:#1d4ed8;--warning:#f59e0b;--accent:#7c3aed;--input-bg:#00000008;--stat-value:#0f172a;--panel-shadow:0 4px 30px #0000000d}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-main);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow-x:hidden}.glass-panel{background:var(--bg-panel);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);box-shadow:var(--panel-shadow);border-radius:16px;padding:24px}.admin-layout{min-height:100vh;display:flex}.sidebar{background:var(--bg-panel);border-right:1px solid var(--border-color);flex-direction:column;gap:8px;width:260px;padding:24px;display:flex}.sidebar-logo{color:var(--primary);text-transform:uppercase;letter-spacing:2px;margin-bottom:32px;font-size:24px;font-weight:800}.nav-link{color:var(--text-muted);border-radius:8px;align-items:center;gap:12px;padding:12px 16px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-link:hover,.nav-link.active{color:var(--primary);background:#3b82f61a}.main-content{flex-direction:column;flex:1;gap:24px;padding:32px;display:flex}h1{margin-bottom:8px;font-size:28px;font-weight:700}h2{margin-bottom:16px;font-size:20px;font-weight:600}.subtitle{color:var(--text-muted);font-size:14px}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{color:var(--danger);background:#ef444433;border:1px solid #ef44444d}.btn-danger:hover{background:var(--danger);color:#fff}.form-input{background:var(--input-bg);border:1px solid var(--border-color);width:100%;color:var(--text-main);border-radius:8px;padding:12px;font-family:inherit;font-size:14px;transition:all .2s}.form-input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 2px #3b82f633}.form-input::placeholder{color:var(--text-muted)}.data-table-wrapper{border:1px solid var(--border-color);border-radius:8px;overflow-x:auto}.data-table{border-collapse:collapse;text-align:left;width:100%}.data-table th{background:var(--input-bg);color:var(--text-muted);border-bottom:1px solid var(--border-color);white-space:nowrap;padding:16px;font-size:14px;font-weight:600}.data-table td{border-bottom:1px solid var(--border-color);white-space:nowrap;padding:16px;font-size:14px}.data-table tbody tr:hover{background:#ffffff05}.badge{border-radius:99px;padding:4px 8px;font-size:12px;font-weight:600}.badge-success{color:var(--success);background:#10b98133}.badge-warning{color:var(--warning);background:#f59e0b33}.badge-danger{color:var(--danger);background:#ef444433}.grid-cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;display:grid}.stat-card{flex-direction:column;gap:8px;display:flex}.stat-value{color:var(--stat-value);font-size:32px;font-weight:700}.mobile-header,.mobile-overlay,.mobile-close-btn-inside{display:none}@media (width<=768px){.admin-layout{flex-direction:column;padding-top:60px;padding-bottom:20px}.mobile-header{background:var(--bg-panel);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-color);z-index:90;align-items:center;gap:16px;height:60px;padding:0 16px;display:flex;position:fixed;top:0;left:0;right:0}.mobile-menu-btn{color:var(--text-main);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;display:flex}.desktop-logo{display:none!important}.mobile-logo{color:var(--primary);text-transform:uppercase;letter-spacing:2px;margin:0;font-size:18px;font-weight:800}.mobile-overlay{z-index:95;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#00000080;position:fixed;inset:0}.sidebar{z-index:100;transition:left .3s;top:0;bottom:0;left:-280px;border-right:1px solid var(--border-color)!important;background:var(--bg-panel)!important;-webkit-backdrop-filter:blur(24px)!important;border-radius:0!important;width:260px!important;height:100vh!important;padding:24px!important;position:fixed!important}.sidebar.mobile-open{left:0}.sidebar nav{background:0 0;border:none;flex-direction:column;height:auto;padding:0;position:static}.nav-link{text-align:left;border-radius:8px;flex-direction:row;justify-content:flex-start;gap:12px;padding:12px 16px}.nav-link span{font-weight:500;font-size:14px!important;display:inline!important}.main-content{gap:16px;padding:16px}h1{font-size:24px}.grid-cards{grid-template-columns:1fr}.quiz-tabs::-webkit-scrollbar{display:none}.quiz-tabs{-ms-overflow-style:none;scrollbar-width:none}.quiz-filter-bar{flex-direction:column;align-items:stretch!important}.quiz-filter-group{justify-content:space-between}.quiz-add-btn{justify-content:center;width:100%}.btn-icon-text span{display:none}.mobile-close-btn-inside{justify-content:center;align-items:center;display:flex!important}.hide-on-mobile{display:none!important}}