*{margin:0;padding:0;box-sizing:border-box;}:root{--primary-purple:#4A148C;--secondary-pink:#E91E63;--pink-light:#FF4081;--white:#FFFFFF;--light-gray:#F3F4F6;--dark-gray:#333333;--green:#00A651;--green-dark:#008A43;--text-light:rgba(255,255,255,0.9);--shadow:0 4px 6px rgba(0,0,0,0.1);--shadow-lg:0 10px 25px rgba(0,0,0,0.15);}body{font-family:'Poppins',sans-serif;color:var(--dark-gray);line-height:1.6;background-color:var(--white);}.container{max-width:1200px;margin:0 auto;padding:0 20px;}.main-header{background:linear-gradient(135deg,#E8F5E9 0%,#FFFBF0 50%,#E3F2FD 100%);padding:15px 0;position:sticky;top:0;z-index:1000;box-shadow:var(--shadow);}.navbar{display:flex;justify-content:space-between;align-items:center;gap:20px;}.logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:24px;}.logo-icon{background:linear-gradient(135deg,#FFA726 0%,#FFB74D 100%);color:white;width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;}.logo-text{color:var(--dark-gray);}.nav-menu{display:flex;list-style:none;gap:20px;align-items:center;}.nav-link{text-decoration:none;color:var(--dark-gray);font-weight:500;font-size:15px;padding:8px 12px;border-radius:6px;transition:all 0.3s;white-space:nowrap;}.nav-link:hover{color:var(--green);background-color:rgba(0,166,81,0.08);}.auth-buttons{display:flex;gap:12px;align-items:center;}.theme-toggle{background:white;border:2px solid #E0E0E0;border-radius:8px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.3s;font-size:18px;}.theme-toggle:hover{border-color:var(--primary-purple);background:#F5F5F5;}body.dark-theme .theme-toggle{background:#2a2a2a;border-color:#444;}body.dark-theme 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p{font-size:14px;color:#666;}.categories-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}.category-card{background:white;padding:30px;border-radius:16px;text-align:center;box-shadow:var(--shadow);transition:all 0.3s;cursor:pointer;}.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);}.category-icon{font-size:48px;margin-bottom:15px;}.category-card h3{font-size:18px;color:var(--dark-gray);}.contests-section{background:#FFFFFF;position:relative;}.contests-section .section-header h2{color:#1a1a1a;font-weight:700;}.contests-section .section-header p{color:#555555;}.contests-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}.contest-card{background:white;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:all 0.3s;}.contest-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);}.contest-image{width:100%;height:180px;object-fit:cover;}.contest-content{padding:20px;}.contest-badge{background:var(--green);color:white;padding:6px 12px;border-radius:8px;font-size:12px;font-weight:600;display:inline-block;margin-bottom:10px;}.contest-meta{display:flex;align-items:center;gap:15px;margin:10px 0;font-size:14px;color:#666;}.contest-title{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--dark-gray);}.contest-desc{font-size:14px;color:#666;margin-bottom:15px;}.contest-stats{display:flex;gap:20px;margin:15px 0;padding:15px;background:var(--light-gray);border-radius:8px;}.stat-item{display:flex;align-items:center;gap:8px;font-size:14px;}.progress-bar{width:100%;height:6px;background:#E0E0E0;border-radius:3px;overflow:hidden;margin:10px 0;}.progress-fill{height:100%;background:var(--green);}.leaderboard-preview{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}.player-card{background:linear-gradient(135deg,#A7FFEB 0%,#B9F6CA 100%);padding:30px 20px;border-radius:16px;text-align:center;box-shadow:var(--shadow);position:relative;}.player-rank{position:absolute;top:15px;left:15px;background:white;width:35px;height:35px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--dark-gray);}.player-avatar{width:80px;height:80px;border-radius:50%;background:white;margin:0 auto 15px;display:flex;align-items:center;justify-content:center;font-size:40px;}.player-name{font-size:16px;font-weight:600;margin-bottom:5px;color:var(--dark-gray);}.player-stats{font-size:12px;color:#666;margin-bottom:10px;}.player-xp{background:linear-gradient(135deg,#FFA726 0%,#FF6F00 100%);color:white;padding:6px 16px;border-radius:20px;font-size:12px;font-weight:600;display:inline-block;}.testimonials-section{background:var(--light-gray);}.testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}.testimonial-card{background:white;padding:30px;border-radius:16px;box-shadow:var(--shadow);}.testimonial-avatar{width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 15px;}.testimonial-name{text-align:center;font-weight:600;margin-bottom:5px;}.testimonial-role{text-align:center;font-size:12px;color:#666;margin-bottom:20px;}.testimonial-text{font-size:14px;color:#666;line-height:1.8;text-align:center;}.stats-section{background:linear-gradient(135deg,#E8F5E9 0%,#FFFBF0 100%);}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}.stat-card{background:white;padding:40px 30px;border-radius:16px;text-align:center;box-shadow:var(--shadow);}.stat-number{font-size:48px;font-weight:700;color:var(--dark-gray);margin-bottom:10px;}.stat-label{font-size:14px;color:#666;}.newsletter-section{background:var(--green);padding:60px 0;}.newsletter-content{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:40px;}.newsletter-text h3{font-size:32px;color:white;margin-bottom:10px;}.newsletter-text p{color:var(--text-light);font-size:14px;}.newsletter-form{display:flex;gap:10px;}.newsletter-form input{flex:1;padding:15px 20px;border:none;border-radius:8px;font-family:'Poppins',sans-serif;}.newsletter-form button{padding:15px 30px;background:var(--green-dark);color:white;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:background 0.3s;}.newsletter-form button:hover{background:#006934;}.main-footer{background:linear-gradient(135deg,#E3F2FD 0%,#E8F5E9 100%);padding:60px 0 20px;}.footer-content{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px;}.footer-logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:24px;margin-bottom:15px;}.footer-desc{color:#666;font-size:14px;margin-bottom:20px;}.social-icons{display:flex;gap:10px;}.social-link{width:40px;height:40px;border-radius:50%;background:white;display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:20px;transition:transform 0.3s;}.social-link:hover{transform:translateY(-3px);}.footer-col h4{font-size:18px;margin-bottom:20px;color:var(--dark-gray);}.footer-links,.footer-contact{list-style:none;}.footer-links li,.footer-contact li{margin-bottom:12px;}.footer-links a{text-decoration:none;color:#666;font-size:14px;transition:color 0.3s;}.footer-links a:hover{color:var(--green);}.footer-contact li{color:#666;font-size:14px;}.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #E0E0E0;color:#666;font-size:14px;}.login-link{color:var(--green);text-decoration:none;margin-left:20px;}.auth-container{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center;padding:40px 0;background:var(--light-gray);}.auth-box{background:white;padding:50px;border-radius:16px;box-shadow:var(--shadow-lg);width:100%;max-width:450px;}.auth-box h2{text-align:center;margin-bottom:30px;color:var(--dark-gray);}.form-group{margin-bottom:20px;}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--dark-gray);}.form-group input{width:100%;padding:12px 15px;border:2px solid #E0E0E0;border-radius:8px;font-family:'Poppins',sans-serif;font-size:14px;transition:border-color 0.3s;}.form-group input:focus{outline:none;border-color:var(--green);}.alert{padding:12px 15px;border-radius:8px;margin-bottom:20px;font-size:14px;}.alert-error{background:#FFEBEE;color:#C62828;}.alert-success{background:#E8F5E9;color:#2E7D32;}.text-center{text-align:center;}.mt-20{margin-top:20px;}.quiz-container{min-height:calc(100vh - 200px);padding:40px 0;}.quiz-box{background:white;padding:40px;border-radius:16px;box-shadow:var(--shadow-lg);margin-bottom:30px;}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;border-bottom:2px solid var(--light-gray);}.quiz-progress{font-size:14px;color:#666;}.quiz-score{font-size:18px;font-weight:600;color:var(--green);}.question-text{font-size:22px;font-weight:600;margin-bottom:30px;color:var(--dark-gray);}.options-grid{display:grid;gap:15px;}.option-btn{padding:20px;background:var(--light-gray);border:2px solid transparent;border-radius:12px;text-align:left;cursor:pointer;transition:all 0.3s;font-size:16px;font-family:'Poppins',sans-serif;}.option-btn:hover{background:white;border-color:var(--green);}.option-btn.selected{background:white;border-color:var(--green);}.option-btn.correct{background:#E8F5E9;border-color:#4CAF50;}.option-btn.incorrect{background:#FFEBEE;border-color:#F44336;}.quiz-actions{display:flex;justify-content:space-between;margin-top:30px;}.leaderboard-table{background:white;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);}.leaderboard-table table{width:100%;border-collapse:collapse;}.leaderboard-table th{background:var(--green);color:white;padding:15px;text-align:left;font-weight:600;}.leaderboard-table td{padding:15px;border-bottom:1px solid var(--light-gray);}.leaderboard-table tr:hover{background:var(--light-gray);}/* ============================================== RESPONSIVE DESIGN - MOBILE FIRST ============================================== *//* Base styles are mobile-first (0-640px) *//* Small Mobile (max 480px) */@media (max-width:480px){.container{padding:0 15px;}.logo{font-size:20px;}.nav-menu{display:none;}.auth-buttons{flex-direction:row;gap:8px;}.btn{padding:8px 16px;font-size:14px;}.section{padding:40px 0;}.section-header{margin-bottom:30px;}.section-header h2{font-size:28px;}.section-header p{font-size:14px;padding:0 10px;}.hero-section{padding:40px 0;}.hero-text h1{font-size:2rem;line-height:1.2;}.hero-text p{font-size:0.95rem;}.hero-content{grid-template-columns:1fr;gap:30px;}.hero-image img{max-width:250px;}.categories-grid{grid-template-columns:repeat(2,1fr);gap:12px;}.category-card{padding:20px 10px;}.category-icon{font-size:32px;margin-bottom:8px;}.category-card h3{font-size:13px;}.steps-grid{grid-template-columns:1fr;gap:20px;}.step-card{padding:25px 20px;}.features-grid{grid-template-columns:1fr;gap:30px;}.feature-image img{max-width:250px;margin:0 auto;display:block;}.stats-grid{grid-template-columns:repeat(2,1fr);gap:12px;}.stat-card{padding:20px 15px;}.stat-number{font-size:28px;}.stat-label{font-size:12px;}.contests-grid{grid-template-columns:1fr;}.testimonials-grid{grid-template-columns:1fr;}.newsletter-content{grid-template-columns:1fr;gap:20px;text-align:center;}.newsletter-text h3{font-size:22px;}.newsletter-form{flex-direction:column;gap:10px;}.newsletter-form input,.newsletter-form button{width:100%;}.footer-content{grid-template-columns:1fr;gap:30px;text-align:center;}.leaderboard-preview{gap:15px;}.player-card{flex-direction:column;text-align:center;gap:8px;padding:15px;}}/* Mobile (481px - 768px) */@media (min-width:481px) and (max-width:768px){.nav-menu{display:none;}.section{padding:50px 0;}.section-header h2{font-size:32px;}.hero-section{padding:50px 0;}.hero-content{grid-template-columns:1fr;gap:40px;}.hero-text h1{font-size:2.5rem;}.categories-grid{grid-template-columns:repeat(3,1fr);gap:20px;}.category-card{padding:25px 15px;}.features-grid{grid-template-columns:1fr;gap:40px;}.steps-grid{grid-template-columns:1fr;gap:25px;}.stats-grid{grid-template-columns:repeat(2,1fr);gap:20px;}.contests-grid{grid-template-columns:repeat(2,1fr);}.testimonials-grid{grid-template-columns:1fr;gap:20px;}.newsletter-content{grid-template-columns:1fr;gap:25px;text-align:center;}.newsletter-form{max-width:500px;margin:0 auto;}.footer-content{grid-template-columns:repeat(2,1fr);}}/* Tablet (769px - 1024px) */@media (min-width:769px) and (max-width:1024px){.categories-grid{grid-template-columns:repeat(3,1fr);}.features-grid{grid-template-columns:repeat(2,1fr);}.stats-grid{grid-template-columns:repeat(4,1fr);}.contests-grid{grid-template-columns:repeat(2,1fr);}.testimonials-grid{grid-template-columns:repeat(2,1fr);}}/* Desktop (1025px+) - Default styles apply */@media (min-width:1025px){.hero-text h1{font-size:3.5rem;}}/* Touch-friendly tap targets for mobile */@media (hover:none) and (pointer:coarse){.btn,.nav-link,.option-btn,.filter-btn{min-height:48px;min-width:48px;padding:12px 20px;}.category-card,.quiz-card,.contest-card{padding:24px;}}/* Landscape orientation optimizations */@media (orientation:landscape) and (max-height:600px){.hero-section{padding:40px 0;}.section{padding:40px 0;}}/* Dark Theme Styles */body.dark-theme{background-color:#1a1a1a;color:#e0e0e0;}body.dark-theme .main-header{background:linear-gradient(135deg,#1e1e1e 0%,#2a2a2a 50%,#1e1e1e 100%);border-bottom:1px solid #333;}body.dark-theme .logo-text,body.dark-theme .nav-link,body.dark-theme .user-welcome{color:#e0e0e0;}body.dark-theme .nav-link:hover{background-color:rgba(0,166,81,0.2);color:var(--green);}body.dark-theme .hero-section{background:linear-gradient(135deg,#2a2a2a 0%,#1e1e1e 100%);}body.dark-theme .hero-text h1{color:#ffffff;}body.dark-theme .hero-text p{color:#b0b0b0;}body.dark-theme .hero-title{color:#ffffff;}body.dark-theme .hero-subtitle{color:#b0b0b0;}body.dark-theme .category-card,body.dark-theme .feature-card,body.dark-theme .contest-card,body.dark-theme .quiz-card,body.dark-theme .stat-card{background:#2a2a2a;border:1px solid #333;}body.dark-theme .category-card:hover,body.dark-theme .feature-card:hover,body.dark-theme .contest-card:hover,body.dark-theme .quiz-card:hover{background:#333;border-color:var(--green);}body.dark-theme .category-card h3,body.dark-theme .feature-card h3,body.dark-theme .contest-card h3,body.dark-theme .quiz-title{color:#ffffff;}body.dark-theme .category-card p,body.dark-theme .feature-card p,body.dark-theme .contest-card p{color:#b0b0b0;}body.dark-theme .section-title{color:#ffffff;}body.dark-theme .section-subtitle{color:#b0b0b0;}body.dark-theme .footer{background:#1e1e1e;border-top:1px solid #333;color:#b0b0b0;}body.dark-theme .footer h4{color:#ffffff;}body.dark-theme .footer-link{color:#b0b0b0;}body.dark-theme .footer-link:hover{color:var(--green);}body.dark-theme .auth-container{background:#1a1a1a;}body.dark-theme .auth-box{background:#2a2a2a;border:1px solid #333;}body.dark-theme .auth-box h2{color:#ffffff;}body.dark-theme .form-container{background:#2a2a2a;border:1px solid #333;}body.dark-theme .form-group label{color:#e0e0e0;}body.dark-theme .form-group input,body.dark-theme .form-group select,body.dark-theme .form-group textarea{background:#1e1e1e;border-color:#444;color:#e0e0e0;}body.dark-theme .form-group input:focus,body.dark-theme .form-group select:focus,body.dark-theme .form-group textarea:focus{border-color:var(--green);background:#252525;}body.dark-theme .dashboard-grid,body.dark-theme .admin-content{background:#2a2a2a;}body.dark-theme .dashboard-card{background:#1e1e1e;border:1px solid #333;}body.dark-theme .dashboard-card:hover{background:#252525;}body.dark-theme .dashboard-card h3{color:#ffffff;}body.dark-theme .leaderboard-table{background:#2a2a2a;}body.dark-theme .leaderboard-table td{border-bottom:1px solid #333;color:#e0e0e0;}body.dark-theme .leaderboard-table tr:hover{background:#333;}body.dark-theme .quiz-container{background:#1a1a1a;}body.dark-theme .quiz-box{background:#2a2a2a;border:1px solid #333;}body.dark-theme .quiz-header{border-bottom-color:#444;}body.dark-theme .quiz-progress{color:#b0b0b0;}body.dark-theme .quiz-score{color:var(--green);}body.dark-theme .question-card{background:#1e1e1e;border:1px solid #333;}body.dark-theme .question-text{color:#ffffff;}body.dark-theme .option-btn{background:#1e1e1e;border-color:#444;color:#e0e0e0;}body.dark-theme .option-btn:hover{background:#252525;border-color:var(--green);}body.dark-theme .option-btn.selected{background:#252525;border-color:var(--green);}body.dark-theme .option-btn.correct{background:rgba(0,166,81,0.2);border-color:var(--green);color:#e0e0e0;}body.dark-theme .option-btn.incorrect{background:rgba(233,30,99,0.2);border-color:#E91E63;color:#e0e0e0;}body.dark-theme .admin-sidebar{background:#2a2a2a;border:1px solid #333;}body.dark-theme .admin-sidebar h3{color:#ffffff;}body.dark-theme .admin-nav a{color:#b0b0b0;}body.dark-theme .admin-nav a:hover,body.dark-theme .admin-nav a.active{background:linear-gradient(135deg,#4A148C 0%,#6A1B9A 100%);color:white;}body.dark-theme .alert{background:#2a2a2a;border:1px solid #444;color:#e0e0e0;}body.dark-theme .alert-success{background:rgba(0,166,81,0.2);border-color:var(--green);}body.dark-theme .search-box input{background:#1e1e1e;border-color:#444;color:#e0e0e0;}body.dark-theme .search-box input:focus{background:#252525;border-color:var(--green);}body.dark-theme .filter-btn{background:#2a2a2a;border-color:#444;color:#e0e0e0;}body.dark-theme .filter-btn:hover{background:rgba(0,166,81,0.2);border-color:var(--green);}body.dark-theme .filter-btn.active{background:var(--green);color:white;border-color:var(--green);}body.dark-theme .no-results{background:#2a2a2a;color:#e0e0e0;}body.dark-theme .quiz-meta{color:#b0b0b0;}body.dark-theme .enrollment-fee{color:#b0b0b0;}body.dark-theme .pagination .page-btn{background:#2a2a2a;border-color:#444;color:#e0e0e0;}body.dark-theme .pagination .page-btn:hover{background:#333;border-color:var(--green);}body.dark-theme .pagination .page-btn.active{background:var(--green);color:white;border-color:var(--green);}body.dark-theme .browse-hero{background:linear-gradient(135deg,#1e1e1e 0%,#2a2a2a 100%);}body.dark-theme .contest-filter-tabs .tab-btn{background:#2a2a2a;color:#b0b0b0;}body.dark-theme .contest-filter-tabs .tab-btn.active{background:var(--green);color:white;}body.dark-theme .contest-info-box{background:#1e1e1e;border:1px solid #333;}body.dark-theme .contest-info-box h4{color:#ffffff;}body.dark-theme .contest-info-box p{color:#b0b0b0;}