@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:#1a1a1a;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.ultra-header{background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.2);position:sticky;top:0;z-index:1000;padding:1rem 0}.header-content{max-width:1200px;margin:0 auto;padding:0 2rem;display:flex;align-items:center;justify-content:space-between;gap:2rem}.logo-section{display:flex;align-items:center;gap:1rem}.logo{font-size:2rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.brand-text h1{font-size:1.5rem;font-weight:700;color:#1a1a1a;margin:0}.brand-text p{font-size:.875rem;color:#666;margin:0}.main-nav{display:flex;gap:.5rem}.nav-btn{padding:.75rem 1.5rem;border:none;border-radius:12px;background:transparent;color:#666;font-weight:500;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.nav-btn:hover{background:#667eea1a;color:#667eea}.nav-btn.active{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.auth-section{display:flex;align-items:center;gap:1rem}.auth-buttons{display:flex;gap:.75rem}.sign-in-btn,.sign-up-btn{padding:.75rem 1.5rem;border:none;border-radius:12px;font-weight:600;cursor:pointer;transition:all .3s ease}.sign-in-btn{background:transparent;color:#667eea;border:2px solid #667eea}.sign-in-btn:hover{background:#667eea;color:#fff}.sign-up-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:2px solid transparent}.sign-up-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #667eea4d}.user-menu{display:flex;align-items:center;gap:1rem}.user-greeting{font-weight:600;color:#1a1a1a}.admin-btn,.sign-out-btn{padding:.5rem 1rem;border:none;border-radius:8px;font-weight:500;cursor:pointer;transition:all .3s ease}.admin-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.sign-out-btn{background:#f3f4f6;color:#666}.sign-out-btn:hover{background:#e5e7eb}.main-content{flex:1}.ultra-homepage{background:linear-gradient(135deg,#667eea,#764ba2)}.ultra-hero{padding:4rem 0 6rem;position:relative;overflow:hidden}.hero-content{max-width:1200px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}.hero-badge{display:inline-flex;align-items:center;gap:.5rem;background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:.75rem 1.5rem;border-radius:50px;font-weight:500;margin-bottom:2rem;border:1px solid rgba(255,255,255,.3)}.hero-title{font-size:3.5rem;font-weight:800;line-height:1.1;margin-bottom:1.5rem}.gradient-text{background:linear-gradient(135deg,#fbbf24,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.25rem;line-height:1.6;margin-bottom:2rem;opacity:.9}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;margin-bottom:3rem}.stat{text-align:center}.stat-number{font-size:2rem;font-weight:800;margin-bottom:.5rem}.stat-label{font-size:.875rem;opacity:.8}.hero-actions{display:flex;gap:1rem}.cta-primary,.cta-secondary{padding:1rem 2rem;border:none;border-radius:12px;font-weight:600;font-size:1.1rem;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;gap:.5rem}.cta-primary{background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#fff}.cta-primary:hover{transform:translateY(-3px);box-shadow:0 10px 30px #fbbf2466}.cta-secondary:hover{background:#ffffff4d}.floating-card{background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:20px;padding:2rem;box-shadow:0 20px 40px #0000001a;border:1px solid rgba(255,255,255,.3);max-width:400px;width:100%}.card-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.avatar{font-size:2rem}.card-title{font-weight:600;color:#1a1a1a}.progress-bars{display:flex;flex-direction:column;gap:1rem}.progress-item{display:flex;align-items:center;gap:1rem;font-size:.875rem}.progress-bar{flex:1;height:8px;background:#e5e7eb;border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:4px;transition:width .3s ease}.floating-badges{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none}.badge{position:absolute;padding:.5rem 1rem;border-radius:50px;font-weight:600;font-size:.875rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3);animation:float 6s ease-in-out infinite}.badge-ai{background:#3b82f633;color:#3b82f6;top:10%;right:-10%;animation-delay:0s}.badge-safety{background:#10b98133;color:#10b981;bottom:30%;left:-15%;animation-delay:2s}.badge-data{background:#f59e0b33;color:#f59e0b;top:60%;right:10%;animation-delay:4s}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}section{padding:4rem 0}.section-header{text-align:center;margin-bottom:3rem;max-width:600px;margin-left:auto;margin-right:auto}.section-header h2{font-size:2.5rem;font-weight:700;margin-bottom:1rem;color:#1a1a1a}.section-header p{font-size:1.125rem;color:#666}.featured-courses{background:#fff;padding:6rem 0}.courses-grid{max-width:1200px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2rem}.course-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px #0000001a;transition:all .3s ease;position:relative;border:1px solid #f3f4f6}.course-card:hover{transform:translateY(-8px);box-shadow:0 20px 40px #00000026}.bestseller-badge{position:absolute;top:1rem;left:1rem;background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#fff;padding:.25rem .75rem;border-radius:20px;font-size:.75rem;font-weight:600;z-index:10}.course-thumbnail{font-size:4rem;text-align:center;padding:2rem;background:linear-gradient(135deg,#f8fafc,#e2e8f0)}.course-content{padding:1.5rem}.course-content h3{font-size:1.25rem;font-weight:600;margin-bottom:.5rem;color:#1a1a1a;line-height:1.3}.instructor{color:#667eea;font-weight:500;margin-bottom:1rem}.course-meta{display:flex;gap:1rem;margin-bottom:1rem;font-size:.875rem;color:#666;flex-wrap:wrap}.course-description{color:#666;line-height:1.6;margin-bottom:1.5rem}.course-footer{display:flex;justify-content:space-between;align-items:center}.price{display:flex;align-items:center;gap:.5rem}.free{color:#10b981;font-weight:700;font-size:1.125rem}.current-price{color:#1a1a1a;font-weight:700;font-size:1.125rem}.original-price{color:#999;text-decoration:line-through;font-size:.875rem}.enroll-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-weight:600;cursor:pointer;transition:all .3s ease}.enroll-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #667eea4d}.section-footer{text-align:center;margin-top:3rem}.view-all-btn{background:transparent;color:#667eea;border:2px solid #667eea;padding:1rem 2rem;border-radius:12px;font-weight:600;cursor:pointer;transition:all .3s ease}.view-all-btn:hover{background:#667eea;color:#fff}.learning-paths{background:#f8fafc;padding:6rem 0}.paths-grid{max-width:1200px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.path-card{background:#fff;padding:2rem;border-radius:16px;box-shadow:0 4px 20px #0000001a;transition:all .3s ease;border:1px solid #f3f4f6}.path-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #00000026}.path-icon{font-size:3rem;margin-bottom:1rem}.path-card h3{font-size:1.5rem;font-weight:700;margin-bottom:1rem;color:#1a1a1a}.path-card p{color:#666;margin-bottom:1.5rem;line-height:1.6}.path-card ul{list-style:none;margin-bottom:1.5rem}.path-card li{color:#666;position:relative;padding:.5rem 0 .5rem 1.5rem}.path-card li:before{content:"✓";position:absolute;left:0;color:#10b981;font-weight:700}.path-meta{display:flex;gap:1rem;font-size:.875rem;color:#667eea;font-weight:500;flex-wrap:wrap}.testimonials{background:#fff;padding:6rem 0}.testimonials-grid{max-width:1200px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.testimonial-card{background:#f8fafc;padding:2rem;border-radius:16px;border:1px solid #e2e8f0;transition:all .3s ease}.testimonial-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #0000001a}.testimonial-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.testimonial-header .avatar{font-size:2.5rem}.student-info h4{font-weight:600;color:#1a1a1a;margin-bottom:.25rem}.student-info p{color:#666;font-size:.875rem;margin-bottom:.5rem}.rating{font-size:.875rem}blockquote{font-style:italic;color:#374151;line-height:1.6;margin-bottom:1rem;font-size:1.1rem}.course-taken{color:#667eea;font-weight:500;font-size:.875rem}.features{background:#f8fafc;padding:6rem 0}.features-grid{max-width:1200px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.feature-card{background:#fff;padding:2rem;border-radius:16px;text-align:center;box-shadow:0 4px 20px #0000001a;transition:all .3s ease;border:1px solid #f3f4f6}.feature-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #00000026}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-card h3{font-size:1.25rem;font-weight:600;margin-bottom:1rem;color:#1a1a1a}.feature-card p{color:#666;line-height:1.6}.partners{background:#fff;padding:6rem 0}.partners-grid{max-width:1000px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:2rem}.partner-card{text-align:center;padding:1.5rem;border-radius:12px;transition:all .3s ease;border:1px solid #f3f4f6}.partner-card:hover{background:#f8fafc;transform:translateY(-3px)}.partner-icon{font-size:2.5rem;margin-bottom:1rem}.partner-card h4{font-weight:600;color:#1a1a1a;font-size:.875rem}.final-cta{background:linear-gradient(135deg,#667eea,#764ba2);padding:6rem 0;text-align:center;color:#fff;position:relative;overflow:hidden}.cta-content{max-width:800px;margin:0 auto;padding:0 2rem;position:relative;z-index:10}.cta-content h2{font-size:2.5rem;font-weight:700;margin-bottom:1rem}.cta-content p{font-size:1.25rem;margin-bottom:2rem;opacity:.9}.cta-stats{display:flex;justify-content:center;gap:4rem;margin-bottom:3rem}.cta-stat{text-align:center}.cta-stat .stat-number{font-size:2.5rem;font-weight:800;margin-bottom:.5rem}.cta-stat .stat-label{font-size:1rem;opacity:.8}.cta-actions{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.cta-icons{position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none}.floating-icon{position:absolute;font-size:2rem;opacity:.1;animation:float 8s ease-in-out infinite}.floating-icon:nth-child(1){top:20%;left:10%;animation-delay:0s}.floating-icon:nth-child(2){top:60%;right:15%;animation-delay:2s}.floating-icon:nth-child(3){bottom:30%;left:20%;animation-delay:4s}.floating-icon:nth-child(4){top:40%;right:30%;animation-delay:6s}.auth-page{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;padding:2rem}.auth-container{background:#fff;border-radius:20px;padding:3rem;max-width:450px;width:100%;box-shadow:0 20px 40px #0000001a}.auth-header{text-align:center;margin-bottom:2rem}.auth-logo{font-size:3rem;margin-bottom:1rem}.auth-header h1{font-size:1.5rem;font-weight:700;color:#1a1a1a;margin-bottom:.5rem}.auth-header h2{font-size:1.75rem;font-weight:700;color:#1a1a1a;margin-bottom:.5rem}.auth-header p{color:#666;margin-bottom:1rem}.auth-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:600;color:#1a1a1a}.form-group input{padding:1rem;border:2px solid #e5e7eb;border-radius:12px;font-size:1rem;transition:all .3s ease}.form-group input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.auth-submit{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem;border-radius:12px;font-weight:600;font-size:1.1rem;cursor:pointer;transition:all .3s ease;margin-top:1rem}.auth-submit:hover{transform:translateY(-2px);box-shadow:0 8px 25px #667eea4d}.demo-accounts{background:#f8fafc;padding:1.5rem;border-radius:12px;margin-top:1.5rem}.demo-accounts h4{font-weight:600;margin-bottom:1rem;color:#1a1a1a}.demo-accounts p{margin-bottom:.5rem;font-size:.875rem;color:#666}.auth-footer{text-align:center;margin-top:1.5rem}.auth-link{background:none;border:none;color:#667eea;font-weight:600;cursor:pointer;text-decoration:underline}.enrollment-page{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;padding:2rem}.enrollment-container{background:#fff;border-radius:20px;padding:3rem;max-width:600px;width:100%;box-shadow:0 20px 40px #0000001a}.enrollment-header{text-align:center;margin-bottom:2rem}.enrollment-header .course-thumbnail{font-size:4rem;margin-bottom:1rem}.enrollment-header h1{font-size:1.75rem;font-weight:700;color:#1a1a1a;margin-bottom:.5rem;line-height:1.3}.enrollment-header .instructor{color:#667eea;font-weight:600;margin-bottom:1rem}.enrollment-header 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var(--space-4);border-radius:var(--radius-lg)}.sign-out-btn{padding:var(--space-2) var(--space-4);border:none;border-radius:var(--radius-md);background:var(--error-color);color:#fff;font-weight:600;cursor:pointer;transition:var(--transition-normal)}.sign-out-btn:hover{background:#e55555;transform:translateY(-1px);box-shadow:var(--shadow-md)}.ultra-hero{background:var(--primary-gradient);min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden}.ultra-hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="rgba(255,255,255,0.1)"/><stop offset="100%" stop-color="rgba(255,255,255,0)"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/><circle cx="900" cy="800" r="80" fill="url(%23a)"/></svg>');animation:float 20s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-20px) rotate(180deg)}}.hero-content{max-width:1400px;margin:0 auto;padding:var(--space-20) var(--space-6);display:grid;grid-template-columns:1fr 1fr;gap:var(--space-16);align-items:center;position:relative;z-index:2}.hero-text{color:#fff}.hero-badge{display:inline-flex;align-items:center;gap:var(--space-2);background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:var(--space-3) var(--space-5);border-radius:var(--radius-full);font-size:.875rem;font-weight:600;margin-bottom:var(--space-6);border:1px solid rgba(255,255,255,.3);animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.hero-title{font-size:4rem;font-weight:900;line-height:1.1;margin-bottom:var(--space-6);letter-spacing:-.02em}.gradient-text{background:linear-gradient(135deg,#ffeaa7,#fab1a0);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-description{font-size:1.25rem;line-height:1.7;margin-bottom:var(--space-8);opacity:.9;font-weight:400}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-6);margin-bottom:var(--space-10)}.stat{text-align:center;background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:var(--space-5);border-radius:var(--radius-xl);border:1px solid rgba(255,255,255,.2);transition:var(--transition-normal)}.stat:hover{background:#fff3;transform:translateY(-5px);box-shadow:var(--shadow-xl)}.stat-number{font-size:2rem;font-weight:800;margin-bottom:var(--space-2);background:linear-gradient(135deg,#ffeaa7,#fab1a0);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-label{font-size:.875rem;font-weight:600;opacity:.8}.hero-actions{display:flex;gap:var(--space-4);align-items:center}.cta-primary,.cta-secondary{padding:var(--space-4) var(--space-8);border:none;border-radius:var(--radius-xl);font-weight:700;font-size:1rem;cursor:pointer;transition:var(--transition-normal);position:relative;overflow:hidden}.cta-primary{background:var(--warning-gradient);color:#fff;box-shadow:var(--shadow-xl)}.cta-primary:hover{transform:translateY(-3px);box-shadow:var(--shadow-2xl)}.cta-secondary{background:#fff3;color:#fff;border:2px solid rgba(255,255,255,.3);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.cta-secondary:hover{background:#ffffff4d;transform:translateY(-2px);box-shadow:var(--shadow-lg)}.hero-visual{position:relative;display:flex;justify-content:center;align-items:center}.learning-dashboard{background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:var(--space-6);border-radius:var(--radius-2xl);box-shadow:var(--shadow-2xl);border:1px solid rgba(255,255,255,.3);max-width:400px;width:100%;animation:float-dashboard 6s ease-in-out infinite}@keyframes float-dashboard{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-10px) rotate(1deg)}}.dashboard-header{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-5)}.student-avatar{width:50px;height:50px;border-radius:var(--radius-full);background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;font-size:1.5rem;box-shadow:var(--shadow-lg)}.dashboard-title{font-size:1.25rem;font-weight:700;color:var(--gray-800)}.learning-tracks{display:flex;flex-direction:column;gap:var(--space-4)}.track{display:flex;align-items:center;justify-content:space-between;padding:var(--space-4);background:var(--gray-50);border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:var(--transition-normal)}.track:hover{background:#fff;box-shadow:var(--shadow-md);transform:translate(5px)}.track-info{display:flex;align-items:center;gap:var(--space-3)}.track-icon{width:40px;height:40px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:1.25rem;box-shadow:var(--shadow-sm)}.track-icon.ai-coding{background:linear-gradient(135deg,#667eea,#764ba2)}.track-icon.ai-safety{background:linear-gradient(135deg,#43e97b,#38f9d7)}.track-icon.data-analytics{background:linear-gradient(135deg,#fa709a,#fee140)}.track-title{font-weight:600;color:var(--gray-800);font-size:.875rem}.track-progress{display:flex;align-items:center;gap:var(--space-2)}.progress-circle{width:40px;height:40px;border-radius:var(--radius-full);background:conic-gradient(var(--primary-color) 0deg,var(--gray-200) 0deg);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:var(--gray-700);position:relative}.progress-circle.progress-75{background:conic-gradient(var(--primary-color) 270deg,var(--gray-200) 270deg)}.progress-circle.progress-50{background:conic-gradient(var(--success-color) 180deg,var(--gray-200) 180deg)}.progress-circle.progress-20{background:conic-gradient(var(--warning-color) 72deg,var(--gray-200) 72deg)}.course-card{background:#fff;border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-lg);transition:var(--transition-normal);border:1px solid var(--gray-200);position:relative}.course-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-2xl);border-color:var(--primary-color)}.course-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--primary-gradient);opacity:0;transition:var(--transition-normal)}.course-card:hover:before{opacity:1}.bestseller-badge{position:absolute;top:var(--space-4);left:var(--space-4);background:var(--warning-gradient);color:#fff;padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);font-size:.75rem;font-weight:700;z-index:10;box-shadow:var(--shadow-md)}.course-thumbnail{height:200px;background:var(--primary-gradient);display:flex;align-items:center;justify-content:center;font-size:4rem;position:relative;overflow:hidden}.course-thumbnail:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,rgba(255,255,255,.1),transparent)}.course-content{padding:var(--space-6)}.course-content h3{font-size:1.25rem;font-weight:700;color:var(--gray-900);margin-bottom:var(--space-2);line-height:1.3}.instructor{color:var(--gray-600);font-size:.875rem;margin-bottom:var(--space-4);font-weight:500}.course-meta{display:flex;gap:var(--space-4);margin-bottom:var(--space-4);flex-wrap:wrap}.course-meta span{font-size:.75rem;color:var(--gray-600);background:var(--gray-100);padding:var(--space-1) var(--space-2);border-radius:var(--radius-md);font-weight:600}.course-description{color:var(--gray-700);font-size:.875rem;line-height:1.6;margin-bottom:var(--space-4)}.course-tags{display:flex;gap:var(--space-2);margin-bottom:var(--space-5);flex-wrap:wrap}.tag{background:var(--primary-color);color:#fff;padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);font-size:.75rem;font-weight:600}.course-footer{display:flex;align-items:center;justify-content:space-between;padding-top:var(--space-4);border-top:1px solid var(--gray-200)}.price{display:flex;align-items:center;gap:var(--space-2)}.free{color:var(--success-color);font-weight:700;font-size:1.125rem}.current-price{color:var(--gray-900);font-weight:700;font-size:1.125rem}.original-price{color:var(--gray-500);text-decoration:line-through;font-size:.875rem}.enroll-btn{background:var(--primary-gradient);color:#fff;border:none;padding:var(--space-3) var(--space-6);border-radius:var(--radius-lg);font-weight:600;cursor:pointer;transition:var(--transition-normal);box-shadow:var(--shadow-md)}.enroll-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}@media (max-width: 1024px){.hero-content{grid-template-columns:1fr;gap:var(--space-12);text-align:center}.hero-title{font-size:3rem}.hero-stats{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.header-content{padding:var(--space-3) var(--space-4);gap:var(--space-4)}.nav-menu{display:none}.hero-title{font-size:2.5rem}.hero-stats{grid-template-columns:1fr;gap:var(--space-4)}.hero-actions{flex-direction:column;width:100%}.cta-primary,.cta-secondary{width:100%;justify-content:center}}@media (max-width: 480px){.brand-name{font-size:1.25rem}.brand-tagline{font-size:.75rem}.hero-title{font-size:2rem}.hero-description{font-size:1rem}.auth-buttons{flex-direction:column;gap:var(--space-2)}.sign-in-btn,.sign-up-btn{padding:var(--space-2) var(--space-4);font-size:.75rem}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes fadeInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}.animate-fade-in-up{animation:fadeInUp .6s ease-out}.animate-fade-in-left{animation:fadeInLeft .6s ease-out}.animate-fade-in-right{animation:fadeInRight .6s ease-out}.notification{position:fixed;top:var(--space-6);right:var(--space-6);background:var(--success-gradient);color:#fff;padding:var(--space-4) var(--space-6);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);z-index:10000;font-weight:600;animation:slideInRight .3s ease-out}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}button:focus,input:focus,select:focus,textarea:focus{outline:none;box-shadow:0 0 0 3px #667eea4d}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media print{.header,.auth-section,.hero-actions,.enroll-btn{display:none!important}body{background:#fff!important;color:#000!important}.course-card{break-inside:avoid;box-shadow:none!important;border:1px solid #ccc!important}}