*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Inter',sans-serif;line-height:1.6;color:#333;background-color:#fff}.container{max-width:1200px;margin:0 auto;padding:0 20px}.text-gradient{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border:none;border-radius:12px;font-weight:500;text-decoration:none;cursor:pointer;transition:all .3s ease;font-size:14px}.btn-primary{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 25px rgba(102,126,234,.3)}.btn-secondary{background:#f8f9fa;color:#333;border:2px solid #e9ecef}.btn-secondary:hover{background:#e9ecef;transform:translateY(-2px)}.btn-outline{background:transparent;color:#667eea;border:2px solid #667eea}.btn-outline:hover{background:#667eea;color:#fff}.btn-large{padding:16px 32px;font-size:16px}.btn-block{width:100%;justify-content:center}.navbar{position:fixed;top:0;width:100%;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);z-index:1000;border-bottom:1px solid #e9ecef}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:70px}.nav-logo{display:flex;align-items:center;gap:12px}.logo{width:40px;height:40px;border-radius:8px}.logo-text{font-size:20px;font-weight:700;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-menu{display:flex;align-items:center;gap:32px}.nav-link{text-decoration:none;color:#333;font-weight:500;transition:color .3s ease}.nav-link:hover{color:#667eea}.login-btn{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff!important;padding:10px 20px;border-radius:8px}.nav-toggle{display:none;flex-direction:column;cursor:pointer}.bar{width:25px;height:3px;background:#333;margin:3px 0;transition:.3s}.hero{padding:120px 0 80px;background:linear-gradient(135deg,#f5f7fa 0%,#c3cfe2 100%)}.hero-container{max-width:1200px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.hero-title{font-size:3rem;font-weight:700;line-height:1.2;margin-bottom:24px;color:#1a202c}.hero-description{font-size:1.2rem;color:#4a5568;margin-bottom:32px;line-height:1.6}.hero-buttons{display:flex;gap:16px;margin-bottom:48px}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.stat-item{text-align:center}.stat-number{font-size:2rem;font-weight:700;color:#667eea;margin-bottom:4px}.stat-label{font-size:.9rem;color:#718096}.hero-visual{position:relative}.hero-card{background:#fff;border-radius:20px;padding:20px;box-shadow:0 20px 60px rgba(0,0,0,.1);transform:rotate(3deg)}.hero-image{width:100%;border-radius:12px}.floating-elements{position:absolute;top:0;left:0;width:100%;height:100%}.floating-card{position:absolute;background:#fff;padding:12px 16px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.1);display:flex;align-items:center;gap:8px;font-weight:500}.card-1{top:10%;right:-20px;animation:float 3s ease-in-out infinite}.card-2{bottom:30%;left:-20px;animation:float 3s ease-in-out infinite 1s}.card-3{bottom:10%;right:30%;animation:float 3s ease-in-out infinite 2s}@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}.section-header{text-align:center;margin-bottom:60px}.section-title{font-size:2.5rem;font-weight:700;margin-bottom:16px;color:#1a202c}.section-description{font-size:1.2rem;color:#718096;max-width:600px;margin:0 auto}.courses-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;margin-bottom:60px}.course-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:all .3s ease}.course-card:hover{transform:translateY(-8px);box-shadow:0 20px 40px rgba(0,0,0,.15)}.course-image{position:relative;height:200px;overflow:hidden}.course-image img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}.course-card:hover .course-image img{transform:scale(1.05)}.course-image-placeholder{width:100%;height:100%;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);display:flex;align-items:center;justify-content:center;color:#fff;font-size:3rem}.course-badge{position:absolute;top:12px;right:12px;background:#667eea;color:#fff;padding:6px 12px;border-radius:20px;font-size:.8rem;font-weight:500}.course-content{padding:24px}.course-title{font-size:1.2rem;font-weight:600;margin-bottom:12px;color:#1a202c;line-height:1.4}.course-description{color:#718096;font-size:.9rem;margin-bottom:20px;line-height:1.5}.course-meta{display:flex;justify-content:space-between;margin-bottom:20px}.meta-item{display:flex;align-items:center;gap:6px;font-size:.8rem;color:#718096}.course-actions{display:flex;gap:12px}.features-section{padding:80px 0;background:#f8f9fa}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:40px}.feature-card{text-align:center;padding:40px 20px;background:#fff;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:all .3s ease}.feature-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px rgba(0,0,0,.15)}.feature-icon{width:80px;height:80px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 24px;color:#fff;font-size:2rem}.feature-card h3{font-size:1.4rem;font-weight:600;margin-bottom:16px;color:#1a202c}.feature-card p{color:#718096;line-height:1.6}.cta-section{padding:80px 0;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;text-align:center}.cta-content h2{font-size:2.5rem;font-weight:700;margin-bottom:16px}.cta-content p{font-size:1.2rem;margin-bottom:32px;opacity:.9}.cta-buttons{display:flex;gap:16px;justify-content:center}.cta-section .btn-outline{background:transparent;color:#fff;border:2px solid #fff}.cta-section .btn-outline:hover{background:#fff;color:#667eea}.footer{background:#1a202c;color:#fff;padding:10px 0 20px}.social-links{display:flex;gap:12px}.social-link{width:40px;height:40px;background:#2d3748;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;text-decoration:none;transition:background .3s ease}.social-link:hover{background:#667eea}.contact-info p{display:flex;align-items:center;gap:12px;margin-bottom:12px;color:#a0aec0}.login-page{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-container{width:100%;max-width:1000px}.login-card{background:#fff;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,.2);overflow:hidden}.login-header{padding:40px 40px 20px;text-align:center;border-bottom:1px solid #e9ecef}.back-home{display:inline-flex;align-items:center;gap:8px;color:#667eea;text-decoration:none;font-weight:500;margin-bottom:20px}.login-logo{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:12px}.login-logo img{width:50px;height:50px;border-radius:10px}.login-logo h1{font-size:2rem;font-weight:700;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-subtitle{color:#718096;font-size:1.1rem}.role-selection{padding:40px}.role-selection h2{text-align:center;font-size:1.8rem;font-weight:600;margin-bottom:40px;color:#1a202c}.role-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}.role-card{background:#f8f9fa;padding:40px 30px;border-radius:16px;text-align:center;border:2px solid transparent;transition:all .3s ease;cursor:pointer}.role-card:hover{border-color:#667eea;transform:translateY(-5px);box-shadow:0 15px 35px rgba(102,126,234,.1)}.role-icon{width:80px;height:80px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;color:#fff;font-size:2rem}.role-card h3{font-size:1.4rem;font-weight:600;margin-bottom:12px;color:#1a202c}.role-card p{color:#718096;margin-bottom:20px;line-height:1.5}.role-card ul{list-style:none;text-align:left;margin-bottom:30px}.role-card li{display:flex;align-items:center;gap:8px;margin-bottom:8px;color:#4a5568;font-size:.9rem}.role-card li i{color:#48bb78}.login-form-section{padding:40px}.role-badge{display:inline-flex;align-items:center;gap:8px;background:#edf2f7;padding:8px 16px;border-radius:20px;margin-bottom:30px;font-weight:500}.change-role{background:none;border:none;color:#667eea;cursor:pointer;font-size:.9rem;margin-left:8px}.alert{padding:16px;border-radius:12px;margin-bottom:24px;display:flex;align-items:center;gap:12px}.alert-error{background:#fed7d7;color:#c53030;border:1px solid #feb2b2}.login-form{max-width:400px;margin:0 auto}.form-group{margin-bottom:24px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:#4a5568}.input-group{position:relative;display:flex;align-items:center}.input-group i{position:absolute;left:16px;color:#a0aec0;z-index:2}.input-group input{width:100%;padding:16px 16px 16px 48px;border:2px solid #e2e8f0;border-radius:12px;font-size:1rem;transition:border-color .3s ease}.input-group input:focus{outline:none;border-color:#667eea}.toggle-password{position:absolute;right:16px;background:none;border:none;color:#a0aec0;cursor:pointer;z-index:2}.form-options{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.checkbox{display:flex;align-items:center;gap:8px;cursor:pointer}.checkbox input{width:18px;height:18px}.forgot-password{color:#667eea;text-decoration:none;font-size:.9rem}.forgot-password:hover{text-decoration:underline}.login-footer{text-align:center;margin-top:24px;padding-top:24px;border-top:1px solid #e2e8f0}.register-link{color:#667eea;text-decoration:none;font-weight:500}.register-link:hover{text-decoration:underline}.demo-accounts{margin-top:30px;text-align:center;color:#fff}.demo-accounts h4{margin-bottom:16px;font-weight:600}.demo-cards{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.demo-card{background:rgba(255,255,255,.1);padding:12px 20px;border-radius:8px;font-size:.9rem;backdrop-filter:blur(10px)}.empty-state{text-align:center;padding:60px 20px;color:#718096}.empty-state i{margin-bottom:20px;color:#cbd5e0}.empty-state h3{font-size:1.5rem;margin-bottom:12px;color:#4a5568}.section-cta{text-align:center}@media (max-width:768px){.nav-menu{display:none}.nav-toggle{display:flex}.hero-container{grid-template-columns:1fr;gap:40px;text-align:center}.hero-title{font-size:2rem}.hero-buttons{flex-direction:column;align-items:center}.hero-stats{grid-template-columns:repeat(2,1fr)}.footer-content{grid-template-columns:1fr;gap:30px}.cta-buttons{flex-direction:column;align-items:center}.role-cards{grid-template-columns:1fr}.demo-cards{flex-direction:column}.courses-grid{grid-template-columns:1fr}.features-grid{grid-template-columns:1fr}}