:root{--primary-50: #edfcf2;--primary-100: #d4f7e0;--primary-200: #acedca;--primary-300: #75dcaa;--primary-400: #3dc486;--primary-500: #1aab6d;--primary-600: #0e8a57;--primary-700: #0c6e47;--primary-800: #0c573a;--primary-900: #0b4731;--accent-50: #fffaeb;--accent-100: #fef0c7;--accent-200: #fedf89;--accent-300: #fec84b;--accent-400: #fdb022;--accent-500: #f79009;--accent-600: #db6e04;--accent-700: #b64e07;--accent-800: #93400d;--accent-900: #7a350f;--secondary-50: #eff8ff;--secondary-100: #d1e9ff;--secondary-200: #b2ddff;--secondary-300: #84caff;--secondary-400: #53b1fd;--secondary-500: #2e90fa;--secondary-600: #1570ef;--secondary-700: #175cd3;--secondary-800: #1849a9;--secondary-900: #194185;--danger-500: #f04438;--danger-600: #d92d20;--gray-25: #fcfcfd;--gray-50: #f9fafb;--gray-100: #f2f4f7;--gray-200: #eaecf0;--gray-300: #d0d5dd;--gray-400: #98a2b3;--gray-500: #667085;--gray-600: #475467;--gray-700: #344054;--gray-800: #1d2939;--gray-900: #101828;--bg-body: #fafbff;--bg-card: #ffffff;--bg-sidebar: #f3f4f8;--bg-modal-overlay: rgba(16, 24, 40, .55);--text-primary: var(--gray-900);--text-secondary: var(--gray-600);--text-tertiary: var(--gray-400);--text-on-primary: #ffffff;--text-on-accent: #ffffff;--shadow-xs: 0 1px 2px rgba(16, 24, 40, .05);--shadow-sm: 0 1px 3px rgba(16, 24, 40, .1), 0 1px 2px rgba(16, 24, 40, .06);--shadow-md: 0 4px 8px -2px rgba(16, 24, 40, .1), 0 2px 4px -2px rgba(16, 24, 40, .06);--shadow-lg: 0 12px 16px -4px rgba(16, 24, 40, .08), 0 4px 6px -2px rgba(16, 24, 40, .03);--shadow-xl: 0 20px 24px -4px rgba(16, 24, 40, .08), 0 8px 8px -4px rgba(16, 24, 40, .03);--shadow-glow-primary: 0 0 20px rgba(26, 171, 109, .25);--shadow-glow-accent: 0 0 20px rgba(247, 144, 9, .25);--border-light: 1px solid var(--gray-200);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 9999px;--font-heading: "Outfit", sans-serif;--font-body: "Inter", sans-serif;--transition-fast: .15s ease;--transition-base: .25s 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var(--transition-fast);text-decoration:none}.nav-link:hover{color:var(--primary-600);background:var(--primary-50)}.nav-link.active{color:var(--primary-700);background:var(--primary-100);font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.625rem 1.25rem;border-radius:var(--radius-sm);font-weight:600;font-size:.875rem;border:none;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap}.btn:active{transform:scale(.97)}.btn-primary{background:linear-gradient(135deg,var(--primary-500),var(--primary-600));color:var(--text-on-primary);box-shadow:var(--shadow-sm),inset 0 1px 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auto;background:var(--bg-card);border-radius:var(--radius-xl);border:var(--border-light);padding:2.5rem;box-shadow:var(--shadow-sm)}.lesson-detail .lesson-header{margin-bottom:2rem}.lesson-detail .lesson-header h1{font-size:2rem;margin-bottom:.75rem}.lesson-detail .lesson-header .lesson-meta{display:flex;gap:.5rem;flex-wrap:wrap}.lesson-detail .lesson-content{line-height:1.8;color:var(--gray-700)}.lesson-detail .lesson-content h2{font-size:1.4rem;margin:1.75rem 0 .75rem;color:var(--text-primary)}.lesson-detail .lesson-content h3{font-size:1.15rem;margin:1.25rem 0 .5rem;color:var(--text-primary)}.lesson-detail .lesson-content p{margin-bottom:1rem}.lesson-detail .lesson-content ul,.lesson-detail .lesson-content ol{padding-left:1.5rem;margin-bottom:1rem}.lesson-detail .lesson-content li{margin-bottom:.4rem}.lesson-detail .lesson-content strong{color:var(--primary-700)}.dashboard-header{margin-bottom:2rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.dashboard-header h1{font-size:1.75rem}.welcome-text{color:var(--text-secondary);font-size:.9rem}.form-group{margin-bottom:1.25rem}.form-label{display:block;font-size:.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:.375rem;text-transform:uppercase;letter-spacing:.04em}.form-input{width:100%;padding:.75rem 1rem;border:2px solid var(--gray-200);border-radius:var(--radius-sm);font-size:.9rem;transition:all var(--transition-fast);background:var(--bg-card)}.form-input:focus{outline:none;border-color:var(--primary-400);box-shadow:0 0 0 3px #1aab6d1f}.form-input.error{border-color:var(--danger-500)}.form-error{font-size:.75rem;color:var(--danger-500);margin-top:.25rem}.auth-card{max-width:440px;margin:3rem 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var(--gray-200);border-radius:var(--radius-sm);background:var(--bg-card);font-size:.9rem;font-weight:500;color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-body)}.google-btn:hover{border-color:var(--gray-300);background:var(--gray-50);box-shadow:var(--shadow-sm)}.google-btn:active{transform:scale(.98)}.google-btn svg{flex-shrink:0}.auth-divider{display:flex;align-items:center;gap:1rem;margin:1.25rem 0}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--gray-200)}.auth-divider span{font-size:.75rem;color:var(--text-tertiary);font-weight:500;text-transform:uppercase;letter-spacing:.05em}.spinner{width:36px;height:36px;border:3px solid var(--gray-200);border-top-color:var(--primary-500);border-radius:50%;animation:spin .7s linear 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1rem}.navbar-links{gap:0}.nav-link{padding:.5rem;font-size:.8rem}.lesson-detail{padding:1.5rem}.quiz-question-card{padding:1.25rem}.auth-card{margin:1.5rem;padding:1.75rem}}@media(max-width:480px){.stat-grid{grid-template-columns:1fr}.hero-actions{flex-direction:column;align-items:center}.dashboard-header{flex-direction:column;align-items:flex-start}}.curriculum-page{max-width:900px;margin:0 auto;padding:1.5rem 1rem}.curriculum-page h1{margin-bottom:.25rem}.curriculum-page [style*="cursor: pointer"]{will-change:transform}.spinner{width:40px;height:40px;border:4px solid var(--border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.fade-in-up{animation:fadeInUp .4s ease-out}.fade-in{animation:fadeIn .3s ease-out}.curriculum-page button[style*="text-align: left"]:not(:disabled):hover{filter:brightness(.97)}@keyframes drawRing{0%{stroke-dasharray:0 264}}@media(max-width:640px){.curriculum-page{padding:1rem .75rem}.curriculum-page h1{font-size:1.3rem!important}}@media print{.navbar,.footer,.section-tabs,.btn,button{display:none!important}.curriculum-page{max-width:100%;padding:0}.card{box-shadow:none!important;border:1px solid #ddd!important;break-inside:avoid}body{background:#fff!important;color:#000!important}}.admin-menu-container{position:relative;display:inline-block}.admin-toggle{display:flex;align-items:center;gap:.25rem}.admin-dropdown-menu{animation:slideDown .2s ease-out}.admin-menu-item{display:flex;align-items:center;gap:.5rem}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.container{max-width:1200px;margin:0 auto}.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}