:root{--primary: #4F46E5;--primary-light: #6366F1;--primary-dark: #4338CA;--primary-glow: rgba(79, 70, 229, .15);--accent: #7C3AED;--accent-light: #8B5CF6;--accent-glow: rgba(124, 58, 237, .15);--success: #059669;--success-bg: rgba(5, 150, 105, .08);--error: #DC2626;--error-bg: rgba(220, 38, 38, .08);--warning: #B45309;--warning-bg: rgba(180, 83, 9, .08);--bg-body: #F8F9FC;--bg-surface: #F1F3F9;--bg-card: #FFFFFF;--bg-card-hover: #FAFBFE;--bg-input: #F5F6FA;--bg-modal: rgba(15, 23, 42, .45);--text-primary: #0F172A;--text-secondary: #475569;--text-muted: #94A3B8;--text-inverse: #FFFFFF;--border: rgba(15, 23, 42, .08);--border-light: rgba(15, 23, 42, .14);--border-focus: var(--primary);--shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);--shadow-md: 0 8px 24px rgba(15, 23, 42, .08);--shadow-lg: 0 16px 40px rgba(15, 23, 42, .12);--shadow-glow: 0 0 40px var(--primary-glow);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 999px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", monospace;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s cubic-bezier(.16, 1, .3, 1);--max-width: 1200px;--nav-height: 72px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}body{font-family:var(--font-sans);background:var(--bg-body);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden}body:before{content:"";position:fixed;top:0;left:0;right:0;height:600px;background:radial-gradient(ellipse 80% 50% at 50% -20%,var(--primary-glow),transparent);pointer-events:none;z-index:0}a{text-decoration:none;color:inherit}button{border:none;cursor:pointer;font-family:var(--font-sans);font-size:inherit}img{max-width:100%}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-body)}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-height);background:#ffffffd9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}.nav-container{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}.nav-logo{display:flex;align-items:center;gap:10px;font-size:1.4rem;font-weight:800;cursor:pointer}.logo-icon{font-size:1.6rem;animation:pulse-glow 2s ease-in-out infinite}.logo-text{letter-spacing:-.5px}.logo-highlight{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;gap:8px}.nav-link{padding:8px 18px;border-radius:var(--radius-full);font-size:.9rem;font-weight:500;color:var(--text-secondary);transition:var(--transition-base);position:relative}.nav-link:hover{color:var(--text-primary);background:#0f172a0a}.nav-link.active{color:var(--primary);background:#4f46e514}.nav-actions{display:flex;align-items:center;gap:12px}.mobile-menu-btn{display:none;background:none;color:var(--text-primary);font-size:1.5rem;padding:4px 8px}.mobile-menu{position:fixed;top:var(--nav-height);left:0;right:0;background:var(--bg-surface);border-bottom:1px solid var(--border);z-index:999;padding:12px 24px;display:flex;flex-direction:column;gap:4px}.mobile-menu a{padding:12px 16px;border-radius:var(--radius-sm);font-size:1rem;color:var(--text-secondary);transition:var(--transition-fast)}.mobile-menu a:hover{background:#0f172a0a;color:var(--text-primary)}.mobile-menu.hidden{display:none}@media(max-width:768px){.nav-links{display:none}.mobile-menu-btn{display:block}}#main-content{max-width:var(--max-width);margin:0 auto;padding:calc(var(--nav-height) + 32px) 24px 64px;position:relative;z-index:1;min-height:100vh}.hero{text-align:center;padding:48px 0 16px;position:relative}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:#4f46e50f;border:1px solid rgba(79,70,229,.2);border-radius:var(--radius-full);color:var(--primary);font-size:.85rem;font-weight:500;margin-bottom:24px}.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:900;line-height:1.1;margin-bottom:16px;letter-spacing:-1.5px}.hero h1 .gradient-text{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.shutter-line{display:flex;flex-wrap:wrap;justify-content:center}.shutter-char{position:relative;display:inline-block;overflow:hidden;padding:0 .015em}.shutter-char .shutter-main{display:inline-block;opacity:0;animation:shutter-char-in .8s ease forwards}.shutter-line.shutter-accent .shutter-main{color:var(--primary)}.shutter-char .shutter-slice{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1;pointer-events:none;opacity:0;color:var(--primary)}.shutter-slice.slice-top{clip-path:polygon(0 0,100% 0,100% 35%,0 35%);animation:shutter-sweep-ltr .7s ease-in-out forwards}.shutter-slice.slice-mid{clip-path:polygon(0 35%,100% 35%,100% 65%,0 65%);color:var(--text-primary);animation:shutter-sweep-rtl .7s ease-in-out forwards}.shutter-slice.slice-bottom{clip-path:polygon(0 65%,100% 65%,100% 100%,0 100%);animation:shutter-sweep-ltr .7s ease-in-out forwards}.shutter-line.shutter-accent .shutter-slice{color:var(--accent)}.shutter-line.shutter-accent .shutter-slice.slice-mid{color:var(--primary-dark)}@keyframes shutter-char-in{0%{opacity:0;filter:blur(10px)}to{opacity:1;filter:blur(0)}}@keyframes shutter-sweep-ltr{0%{transform:translate(-100%);opacity:0}50%{opacity:1}to{transform:translate(100%);opacity:0}}@keyframes shutter-sweep-rtl{0%{transform:translate(100%);opacity:0}50%{opacity:1}to{transform:translate(-100%);opacity:0}}.hero p{font-size:1.15rem;color:var(--text-secondary);max-width:580px;margin:0 auto 32px;line-height:1.7}.hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:48px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;text-align:center;transition:var(--transition-base)}.stat-card:hover{border-color:var(--border-light);transform:translateY(-2px)}.stat-card .stat-icon{font-size:2rem;margin-bottom:8px}.stat-card .stat-value{font-size:2rem;font-weight:800;font-family:var(--font-mono);background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-card .stat-label{font-size:.85rem;color:var(--text-muted);margin-top:4px;text-transform:uppercase;letter-spacing:1px;font-weight:500}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:var(--radius-full);font-weight:600;font-size:.95rem;transition:var(--transition-base);border:none;cursor:pointer;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 4px 16px var(--primary-glow)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px var(--primary-glow)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.btn-secondary:hover{background:var(--bg-input);transform:translateY(-1px)}.btn-success{background:linear-gradient(135deg,var(--success),#00B87A);color:#fff}.btn-danger{background:linear-gradient(135deg,var(--error),#E0345A);color:#fff}.btn-sm{padding:8px 16px;font-size:.85rem}.btn-lg{padding:16px 32px;font-size:1.05rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition-base)}.card:hover{border-color:var(--border-light);box-shadow:var(--shadow-md);transform:translateY(-4px)}.card-body{padding:24px}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.quiz-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;margin-top:24px}.quiz-card{position:relative}.quiz-card .card-accent{height:4px;background:linear-gradient(90deg,var(--primary),var(--accent))}.quiz-card .category-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--radius-full);font-size:.78rem;font-weight:600;background:#4f46e514;color:var(--primary)}.quiz-card h3{font-size:1.15rem;font-weight:700;margin:12px 0 8px;line-height:1.3}.quiz-card p{font-size:.9rem;color:var(--text-secondary);line-height:1.5;margin-bottom:16px}.quiz-card .meta{display:flex;gap:16px;font-size:.82rem;color:var(--text-muted);margin-bottom:16px}.quiz-card .meta span{display:flex;align-items:center;gap:4px}.role-badge{padding:3px 10px;border-radius:var(--radius-full);font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.role-admin{background:var(--error-bg);color:var(--error)}.role-staff{background:#4f46e514;color:var(--primary)}.role-user{background:var(--success-bg);color:var(--success)}.quiz-container{max-width:720px;margin:0 auto}.quiz-header{text-align:center;margin-bottom:32px}.quiz-header h2{font-size:1.6rem;font-weight:800;margin-bottom:8px}.quiz-progress{display:flex;align-items:center;gap:16px;margin-bottom:24px}.progress-bar{flex:1;height:8px;background:var(--bg-input);border-radius:var(--radius-full);overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:var(--radius-full);transition:width .5s cubic-bezier(.16,1,.3,1)}.progress-text{font-size:.85rem;color:var(--text-muted);font-weight:600;font-family:var(--font-mono);white-space:nowrap}.timer-display{display:flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-full);font-family:var(--font-mono);font-size:1.2rem;font-weight:700;margin-bottom:24px;width:fit-content;margin-left:auto;margin-right:auto}.timer-display.warning{color:var(--warning);border-color:#ffaa004d;animation:pulse-border 1s ease infinite}.timer-display.danger{color:var(--error);border-color:#ff3d714d;animation:pulse-border .5s ease infinite}.question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:32px;animation:fadeSlideUp .4s var(--transition-slow)}.question-number{font-size:.82rem;color:var(--primary);font-weight:600;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:12px}.question-text{font-size:1.2rem;font-weight:600;line-height:1.5;margin-bottom:24px}.question-points{display:inline-flex;align-items:center;gap:4px;font-size:.82rem;color:var(--text-muted);margin-bottom:20px}.options-list{display:flex;flex-direction:column;gap:12px}.option-btn{display:flex;align-items:center;gap:14px;width:100%;padding:16px 20px;background:var(--bg-input);border:2px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-size:1rem;text-align:left;transition:var(--transition-base);cursor:pointer}.option-btn:hover:not(:disabled){border-color:var(--primary);background:#4f46e50a;transform:translate(4px)}.option-btn.selected{border-color:var(--primary);background:#4f46e514;box-shadow:0 0 0 1px var(--primary)}.option-btn.correct{border-color:var(--success);background:var(--success-bg)}.option-btn.incorrect{border-color:var(--error);background:var(--error-bg)}.option-btn .option-marker{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);background:#0f172a0d;font-weight:700;font-size:.85rem;color:var(--text-secondary);flex-shrink:0}.option-btn.selected .option-marker{background:var(--primary);color:#fff}.option-btn.correct .option-marker{background:var(--success);color:#fff}.option-btn.incorrect .option-marker{background:var(--error);color:#fff}.quiz-nav{display:flex;justify-content:space-between;margin-top:24px}.results-container{max-width:720px;margin:0 auto;text-align:center}.results-score-circle{width:180px;height:180px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 24px;position:relative}.results-score-circle:before{content:"";position:absolute;top:-4px;right:-4px;bottom:-4px;left:-4px;border-radius:50%;padding:4px;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude}.results-score-circle .score-percentage{font-size:3rem;font-weight:900;font-family:var(--font-mono);background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.results-score-circle .score-label{font-size:.85rem;color:var(--text-muted)}.results-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;margin:32px 0}.results-stats .stat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px}.results-stats .stat-num{font-size:1.5rem;font-weight:800;font-family:var(--font-mono)}.results-stats .stat-desc{font-size:.82rem;color:var(--text-muted);margin-top:4px}.results-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:32px}.review-section{margin-top:48px;text-align:left}.review-section h3{font-size:1.3rem;font-weight:700;margin-bottom:20px}.review-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;margin-bottom:12px}.review-item.correct-answer{border-left:3px solid var(--success)}.review-item.wrong-answer{border-left:3px solid var(--error)}.review-item .review-q{font-weight:600;margin-bottom:8px}.review-item .review-detail{font-size:.9rem;color:var(--text-secondary);display:flex;flex-direction:column;gap:4px}.review-item .review-detail .correct-label{color:var(--success)}.review-item .review-detail .wrong-label{color:var(--error)}.leaderboard-table{width:100%;border-collapse:separate;border-spacing:0 6px}.leaderboard-table th{text-align:left;padding:12px 16px;font-size:.78rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-weight:600}.leaderboard-table td{padding:16px;background:var(--bg-card);font-size:.95rem}.leaderboard-table tr td:first-child{border-radius:var(--radius-md) 0 0 var(--radius-md)}.leaderboard-table tr td:last-child{border-radius:0 var(--radius-md) var(--radius-md) 0}.leaderboard-table .rank-cell{font-weight:800;font-family:var(--font-mono);font-size:1.5rem;line-height:1;text-align:center;min-width:56px}.leaderboard-header{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}.leaderboard-title h1{font-size:2rem;font-weight:800;margin-bottom:6px;letter-spacing:-.5px}.leaderboard-title p{color:var(--text-secondary);font-size:.95rem}.leaderboard-controls{display:flex;align-items:center;justify-content:flex-end;gap:12px;flex:1 1 400px}@media(max-width:640px){.leaderboard-controls{flex-wrap:wrap;justify-content:flex-start}}.rank-1{color:#b7791f}.rank-2{color:#64748b}.rank-3{color:#92400e}.leaderboard-table .user-cell{font-weight:600}.leaderboard-table .score-cell{font-family:var(--font-mono);font-weight:700;color:var(--primary)}.panel-layout{display:grid;grid-template-columns:240px 1fr;gap:28px;align-items:stretch;min-height:calc(100vh - var(--nav-height) - 128px)}.panel-sidebar{display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px 12px;box-shadow:var(--shadow-sm)}.panel-sidebar-header{padding:8px 12px 14px;border-bottom:1px solid var(--border);margin-bottom:10px}.panel-title{font-size:1.05rem;font-weight:800;letter-spacing:-.3px}.panel-role{font-size:.8rem;color:var(--text-muted);margin-top:2px}.panel-nav{display:flex;flex-direction:column;gap:2px}.panel-nav-item{display:flex;align-items:center;gap:8px;width:100%;text-align:left;padding:10px 12px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:500;color:var(--text-secondary);background:none;transition:var(--transition-fast)}.panel-nav-item:hover:not(.active){background:#0f172a0a;color:var(--text-primary)}.panel-nav-item.active{background:#4f46e514;color:var(--primary);font-weight:600}.panel-content{min-width:0}@media(max-width:900px){.panel-layout{grid-template-columns:1fr;min-height:0}.panel-nav{flex-direction:row;flex-wrap:wrap}.panel-nav-item{width:auto}}.dash-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}.dash-header h1{font-size:1.8rem;font-weight:800;letter-spacing:-.5px;margin-bottom:4px}.dash-header p{color:var(--text-secondary);font-size:.95rem}.btn-dark{background:var(--text-primary);color:var(--text-inverse);box-shadow:var(--shadow-sm)}.btn-dark:hover{background:#1e293b;transform:translateY(-1px)}.kpi-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:14px;margin-bottom:24px}.kpi-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);transition:var(--transition-base)}.kpi-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.kpi-top{display:flex;align-items:center;gap:10px;margin-bottom:14px}.kpi-icon{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:50%;font-size:1.2rem;flex-shrink:0}.kpi-name{font-size:.85rem;font-weight:600;color:var(--text-secondary);line-height:1.25}.kpi-value{font-size:2rem;font-weight:800;letter-spacing:-.5px;line-height:1}.kpi-sub{font-size:.78rem;color:var(--text-muted);margin-top:6px}.dash-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}.dash-chart-card:hover{transform:none}.dash-card-title{font-size:1.02rem;font-weight:700}.dash-card-sub{font-size:.82rem;color:var(--text-muted);margin-bottom:16px}.chart-empty{padding:32px 0;text-align:center;color:var(--text-muted);font-size:.88rem}.bar-row{margin-bottom:14px}.bar-row-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:6px}.bar-label{font-size:.86rem;font-weight:500}.bar-value{font-size:.86rem;font-weight:700;font-variant-numeric:tabular-nums}.bar-track{height:10px;background:#e0e7ff;border-radius:var(--radius-full);overflow:hidden}.bar-fill{height:100%;background:var(--primary);border-radius:var(--radius-full);transition:width .6s cubic-bezier(.16,1,.3,1)}.donut-wrap{display:flex;justify-content:center;margin-bottom:16px}.donut-svg{width:160px;height:160px}.donut-seg{transition:opacity var(--transition-fast);cursor:default}.donut-svg:hover .donut-seg:not(:hover){opacity:.45}.donut-center-value{font-size:1.9rem;font-weight:800;fill:var(--text-primary);font-family:var(--font-sans)}.donut-center-label{font-size:.7rem;fill:var(--text-muted);font-family:var(--font-sans)}.legend-row{margin-bottom:10px}.legend-head{display:flex;align-items:center;gap:8px;margin-bottom:4px}.legend-key{width:10px;height:10px;border-radius:3px;flex-shrink:0}.legend-label{font-size:.82rem;color:var(--text-secondary);flex:1}.legend-value{font-size:.82rem;font-weight:600;font-variant-numeric:tabular-nums}.legend-track{height:5px;background:var(--bg-input);border-radius:var(--radius-full);overflow:hidden}.legend-fill{height:100%;border-radius:var(--radius-full)}.trend-svg{width:100%;height:auto}.chart-grid{stroke:var(--border);stroke-width:1}.chart-tick{font-size:.62rem;fill:var(--text-muted);font-family:var(--font-sans)}.chart-area{fill:var(--primary);opacity:.1}.chart-line{fill:none;stroke:var(--primary);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.chart-dot{fill:var(--primary);stroke:var(--bg-card);stroke-width:2}.chart-dot:hover{r:5}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:6px;font-size:.85rem;font-weight:600;color:var(--text-secondary)}.form-input,.form-select,.form-textarea{width:100%;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);font-size:.95rem;transition:var(--transition-fast);outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.form-textarea{min-height:100px;resize:vertical}.form-select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23475569' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:600px){.form-row{grid-template-columns:1fr}}.question-builder{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:16px}.question-builder-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.option-row{display:flex;align-items:center;gap:12px;margin-bottom:8px}.option-row input[type=text]{flex:1}.option-row input[type=radio]{accent-color:var(--primary);width:18px;height:18px}.option-row label{font-size:.82rem;color:var(--text-muted);white-space:nowrap}.filters-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:24px}.search-input-wrapper{position:relative;flex:1;min-width:240px}.search-input-wrapper .search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:1rem}.search-input-wrapper input{width:100%;padding:10px 16px 10px 40px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-full);color:var(--text-primary);font-size:.9rem;outline:none;transition:var(--transition-fast)}.search-input-wrapper input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.filter-select{padding:10px 36px 10px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-full);color:var(--text-primary);font-size:.9rem;outline:none;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23475569' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg-modal);display:flex;align-items:center;justify-content:center;z-index:2000;padding:24px;animation:fadeIn .2s ease}.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px;width:100%;max-width:440px;animation:fadeSlideUp .3s ease}.modal h2{font-size:1.5rem;font-weight:800;margin-bottom:8px}.modal .modal-subtitle{color:var(--text-secondary);margin-bottom:24px;font-size:.95rem}.modal-close{position:absolute;top:16px;right:16px;background:none;color:var(--text-muted);font-size:1.2rem;cursor:pointer}.auth-toggle{text-align:center;margin-top:20px;font-size:.9rem;color:var(--text-secondary)}.auth-toggle a{color:var(--primary-light);font-weight:600;cursor:pointer}.page-header{margin-bottom:32px}.page-header h1{font-size:2rem;font-weight:800;margin-bottom:8px;letter-spacing:-.5px}.page-header p{color:var(--text-secondary);font-size:1.05rem}.section-title{font-size:1.4rem;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:10px}.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-top:20px}.category-chip{display:flex;align-items:center;gap:10px;padding:14px 18px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition-base);font-weight:500}.category-chip:hover{border-color:var(--primary);transform:translateY(-2px);background:#4f46e50a}.category-chip .cat-icon{font-size:1.4rem}.category-chip .cat-info{display:flex;flex-direction:column}.category-chip .cat-name{font-size:.92rem;font-weight:600}.category-chip .cat-count{font-size:.75rem;color:var(--text-muted)}.empty-state{text-align:center;padding:60px 24px}.empty-state .empty-icon{font-size:3.5rem;margin-bottom:16px}.empty-state h3{font-size:1.3rem;font-weight:700;margin-bottom:8px}.empty-state p{color:var(--text-secondary);margin-bottom:20px}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 0;gap:16px}.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.loading-text{color:var(--text-muted);font-size:.9rem}#toast-container{position:fixed;bottom:24px;right:24px;z-index:3000;display:flex;flex-direction:column;gap:8px}.toast{display:flex;align-items:center;gap:10px;padding:14px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);font-size:.9rem;animation:slideInRight .3s ease;min-width:280px}.toast.success{border-left:3px solid var(--success)}.toast.error{border-left:3px solid var(--error)}.toast.info{border-left:3px solid var(--primary)}.toast-icon{font-size:1.2rem}.toast-close{margin-left:auto;background:none;color:var(--text-muted);font-size:1rem;cursor:pointer}.user-badge{display:flex;align-items:center;gap:8px;padding:6px 14px;background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-full);cursor:pointer;transition:var(--transition-fast);box-shadow:var(--shadow-sm)}.user-badge:hover{background:var(--bg-input)}.user-avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:#fff}.user-name{font-size:.85rem;font-weight:600}.password-field{display:flex;gap:8px;align-items:center}.password-field .form-input{flex:1}.switch{position:relative;display:inline-block;width:40px;height:22px;vertical-align:middle}.switch input{opacity:0;width:0;height:0}.switch-slider{position:absolute;cursor:pointer;top:0;right:0;bottom:0;left:0;background:#cbd5e1;border-radius:var(--radius-full);transition:var(--transition-fast)}.switch-slider:before{content:"";position:absolute;height:16px;width:16px;left:3px;top:3px;background:#fff;border-radius:50%;transition:var(--transition-fast);box-shadow:0 1px 2px #0f172a33}.switch input:checked+.switch-slider{background:var(--success)}.switch input:checked+.switch-slider:before{transform:translate(18px)}.row-disabled{opacity:.55}.table-avatar{width:30px;height:30px;border-radius:50%;background:var(--bg-input);flex-shrink:0}.user-avatar-img{width:28px;height:28px;border-radius:50%;background:var(--bg-input)}.report-controls{display:flex;gap:16px;align-items:flex-end;flex-wrap:wrap}.report-controls .form-group{flex:1;min-width:180px}.report-doc{color:var(--text-primary)}.report-head{border-bottom:2px solid var(--text-primary);padding-bottom:10px;margin-bottom:18px}.report-brand{font-size:1.3rem;font-weight:800;letter-spacing:-.3px}.report-brand-sub{font-size:.8rem;color:var(--text-secondary)}.report-title{font-size:1.1rem;font-weight:700;margin-bottom:4px}.report-subtitle{font-size:.85rem;color:var(--text-secondary);margin-bottom:16px}.report-section-title{font-size:.95rem;font-weight:700;margin:20px 0 8px}.report-table{width:100%;border-collapse:collapse;margin:8px 0 16px;font-size:.85rem}.report-table th,.report-table td{border:1px solid var(--border-light);padding:8px 10px;text-align:left}.report-table th{background:var(--bg-input);font-weight:600}.report-foot{margin-top:24px;padding-top:10px;border-top:1px solid var(--border-light);font-size:.75rem;color:var(--text-muted)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(40px)}to{opacity:1;transform:translate(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse-glow{0%,to{filter:brightness(1)}50%{filter:brightness(1.3)}}@keyframes pulse-border{0%,to{opacity:1}50%{opacity:.6}}@media(max-width:768px){.hero h1{font-size:2rem}.stats-row{grid-template-columns:repeat(2,1fr)}.quiz-grid,.results-stats,.form-row{grid-template-columns:1fr}.question-card{padding:24px 20px}.modal{padding:28px 24px}.categories-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:480px){#main-content{padding-left:16px;padding-right:16px}.hero-actions{flex-direction:column;align-items:center}.stats-row{grid-template-columns:1fr}}