:root{--primary-50: #f0f0ff;--primary-100: #e0e0ff;--primary-200: #c5c5ff;--primary-300: #a0a0ff;--primary-400: #8080ff;--primary-500: #667eea;--primary-600: #667eea;--primary-700: #5a6fd6;--primary-800: #4e60c2;--primary-900: #4252ae;--primary-950: #36449a;--secondary-500: #764ba2;--secondary-600: #6a4392;--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-primary-hover: linear-gradient(135deg, #5a6fd6 0%, #6a4392 100%);--slate-50: #f8fafc;--slate-100: #f1f5f9;--slate-200: #e2e8f0;--slate-300: #cbd5e1;--slate-400: #94a3b8;--slate-500: #64748b;--slate-600: #475569;--slate-700: #334155;--slate-800: #1e293b;--slate-900: #0f172a;--slate-950: #020617;--success-color: #2ed573;--warning-color: #ffa502;--danger-color: #ff4757;--info-color: #3742fa;--sidebar-width: 260px;--header-height: 64px;--border-radius-sm: 4px;--border-radius-md: 8px;--border-radius-lg: 12px;--border-radius-xl: 16px;--border-radius-2xl: 20px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--shadow-card: 0 4px 20px rgba(0, 0, 0, .08);--shadow-card-hover: 0 8px 25px rgba(0, 0, 0, .15);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;--card-bg: white}[data-theme=dark]{--primary-50: #1e1e2f;--primary-100: #2d2d44;--primary-200: #4252ae;--primary-300: #4e60c2;--primary-500: #667eea;--card-bg: #1e293b;--slate-50: #0f172a;--slate-100: #1e293b;--slate-200: #334155;--slate-300: #475569;--slate-400: #64748b;--slate-500: #94a3b8;--slate-600: #cbd5e1;--slate-700: #e2e8f0;--slate-800: #f1f5f9;--slate-900: #f8fafc;--slate-950: #ffffff;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -2px rgba(0, 0, 0, .3);--shadow-card: 0 4px 20px rgba(0, 0, 0, .2);--shadow-card-hover: 0 8px 25px rgba(0, 0, 0, .3)}*,*:before,*:after{box-sizing:border-box}body{margin:0;padding:0;font-family:var(--font-sans);background-color:var(--slate-50);color:var(--slate-900);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;letter-spacing:-.025em;color:var(--slate-900)}p{margin:0 0 1rem;color:var(--slate-600)}a{color:var(--primary-600);text-decoration:none;transition:color .2s}a:hover{color:var(--primary-700)}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.card{background:var(--card-bg, white);border-radius:var(--border-radius-xl);border:none;box-shadow:var(--shadow-card);padding:1.5rem;transition:transform .3s,box-shadow .3s;color:var(--slate-900)}.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-card-hover)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.625rem 1.25rem;font-weight:600;border-radius:var(--border-radius-md);border:none;cursor:pointer;transition:all .2s;font-size:.875rem}.btn-primary{background:var(--gradient-primary);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.btn-secondary{background-color:var(--card-bg, white);border:1px solid var(--slate-200);color:var(--slate-700)}.btn-secondary:hover{background-color:var(--slate-50);border-color:var(--slate-300)}.btn-danger{background-color:#fee2e2;color:var(--danger-color)}.btn-danger:hover{background-color:#fecaca}.input-group{margin-bottom:1rem}.form-label{display:block;font-size:.875rem;font-weight:500;color:var(--slate-700);margin-bottom:.5rem}.form-control{width:100%;padding:.625rem .875rem;border:1px solid var(--slate-200);border-radius:var(--border-radius-md);background-color:var(--card-bg, white);color:var(--slate-900);font-size:.875rem;transition:border-color .2s,box-shadow .2s}.form-control:focus{outline:none;border-color:var(--primary-500);box-shadow:0 0 0 3px var(--primary-100)}.badge{display:inline-flex;align-items:center;padding:.125rem .625rem;border-radius:9999px;font-size:.75rem;font-weight:600}.badge-blue{background-color:var(--primary-100);color:var(--primary-700)}.badge-green{background-color:#d1fae5;color:#047857}.badge-gray{background-color:var(--slate-100);color:var(--slate-700)}.badge-red{background-color:#fee2e2;color:#b91c1c}.badge-admin{background:#ff4757;color:#fff}.badge-teacher{background:#3742fa;color:#fff}.badge-student{background:#2ed573;color:#fff}body.war-room{filter:sepia(.05) hue-rotate(-5deg);transition:filter .5s ease-in-out}body.war-room:before{content:"";position:fixed;inset:0;background:radial-gradient(circle at center,transparent 0%,rgba(220,38,38,.03) 100%);pointer-events:none;z-index:9999;animation:warRoomPulse 4s ease-in-out infinite}@keyframes warRoomPulse{0%,to{opacity:.3}50%{opacity:.6}}body.war-room .sidebar{background:linear-gradient(180deg,#111827,#1f1212)}body.war-room .btn-primary{background-color:#dc2626;border-color:#dc2626}body.war-room .btn-primary:hover{background-color:#b91c1c;box-shadow:0 0 0 3px #dc262633}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--slate-300);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--slate-400)}