:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--secondary-color: #ec4899;--background-color: #f8fafc;--surface-color: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--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);--font-family: "Inter", system-ui, -apple-system, sans-serif;--radius: .5rem}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);background-color:var(--background-color);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button{font-family:inherit}.common-btn{background-color:var(--primary-color);color:#fff;padding:.75rem 1.5rem;border:none;border-radius:var(--radius);font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-sm)}.common-btn:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.home{background:linear-gradient(135deg,#667eea,#764ba2);padding:120px 0 80px;text-align:center;min-height:85vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.home:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');opacity:.3}.home-content{max-width:900px;margin:0 auto;padding:0 20px;animation:fadeIn 1s ease-out;position:relative;z-index:1}.badge{display:inline-block;background:#fff3;color:#fff;padding:.5rem 1.5rem;border-radius:50px;font-size:.9rem;font-weight:500;margin-bottom:1.5rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.home-content h1{font-size:3.5rem;font-weight:800;margin-bottom:1.5rem;color:#fff;line-height:1.2;letter-spacing:-.02em}.home-content>p{font-size:1.25rem;color:#ffffffe6;margin-bottom:2.5rem;max-width:700px;margin-left:auto;margin-right:auto;line-height:1.6}.cta-buttons{display:flex;gap:1rem;justify-content:center;margin-bottom:3rem;flex-wrap:wrap}.primary-btn{background:#fff;color:var(--primary-color);padding:1rem 2.5rem;font-size:1.125rem;border-radius:50px;font-weight:600;box-shadow:0 4px 15px #0003}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}.secondary-btn{background:transparent;color:#fff;border:2px solid white;padding:1rem 2.5rem;font-size:1.125rem;border-radius:50px;font-weight:600}.secondary-btn:hover{background:#fff;color:var(--primary-color)}.quick-stats{display:flex;justify-content:center;gap:3rem;flex-wrap:wrap;margin-top:3rem}.stat-item{display:flex;align-items:center;gap:1rem;color:#fff}.stat-icon{font-size:2.5rem;opacity:.9}.stat-item h3{font-size:2rem;font-weight:700;margin:0}.stat-item p{font-size:.9rem;margin:0;opacity:.9}@keyframes fadeIn{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.section-header{text-align:center;margin-bottom:50px}.section-header h2{font-size:2.5rem;color:var(--text-primary);margin-bottom:1rem;font-weight:700}.section-header p{font-size:1.1rem;color:var(--text-secondary)}.features-section{padding:80px 0;background-color:var(--surface-color)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}.feature-card{background-color:var(--background-color);padding:40px;border-radius:var(--radius);text-align:center;transition:all .3s ease;border:1px solid var(--border-color);position:relative;overflow:hidden}.feature-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),#764ba2);transform:scaleX(0);transition:transform .3s ease}.feature-card:hover:before{transform:scaleX(1)}.feature-card:hover{transform:translateY(-10px);box-shadow:0 10px 30px #0000001a}.icon-box{font-size:3rem;color:var(--primary-color);margin-bottom:20px}.feature-card h3{font-size:1.5rem;margin-bottom:15px;color:var(--text-primary);font-weight:600}.feature-card p{color:var(--text-secondary);line-height:1.6}.access-section{padding:80px 0;background:linear-gradient(135deg,#f8fafc,#e0e7ff)}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}.step-card{background:#fff;padding:40px;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow-md);transition:all .3s ease;border:2px solid transparent}.step-card:hover{border-color:var(--primary-color);transform:translateY(-5px);box-shadow:var(--shadow-lg)}.step-number{display:inline-block;width:60px;height:60px;line-height:60px;background:linear-gradient(135deg,var(--primary-color),#764ba2);color:#fff;border-radius:50%;font-size:1.5rem;font-weight:700;margin-bottom:20px}.step-content h3{font-size:1.3rem;margin-bottom:10px;color:var(--text-primary);font-weight:600}.step-content p{color:var(--text-secondary);line-height:1.6}.cta-section{padding:80px 0;background:linear-gradient(135deg,#667eea,#764ba2);text-align:center}.cta-content h2{font-size:2.5rem;color:#fff;margin-bottom:1rem;font-weight:700}.cta-content p{font-size:1.2rem;color:#ffffffe6;margin-bottom:2rem}.cta-btn{background:#fff;color:var(--primary-color);padding:1rem 3rem;font-size:1.125rem;border-radius:50px;font-weight:600;box-shadow:0 4px 15px #0003}.cta-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}@media (max-width: 768px){.home-content h1{font-size:2.5rem}.home-content>p{font-size:1.1rem}.quick-stats{gap:2rem}.stat-item{flex-direction:column;text-align:center}.section-header h2{font-size:2rem}.features-grid,.steps-grid{grid-template-columns:1fr}.cta-buttons{flex-direction:column;align-items:center}.primary-btn,.secondary-btn{width:100%;max-width:300px}}.testimonials{padding:80px 0;text-align:center;background:linear-gradient(135deg,#f8fafc,#e0e7ff);overflow:hidden}.testimonials .section-header{margin-bottom:50px}.testimonials .section-header h2{font-size:2.5rem;color:var(--text-primary);margin-bottom:1rem;font-weight:700}.testimonials .section-header p{font-size:1.1rem;color:var(--text-secondary)}.testimonials-wrapper{width:100%;overflow:hidden;mask-image:linear-gradient(to right,transparent,black 10%,black 90%,transparent);-webkit-mask-image:linear-gradient(to right,transparent,black 10%,black 90%,transparent)}.testimonials-marquee{display:flex;gap:30px;width:max-content;animation:scroll 40s linear infinite;padding:20px 0}.testimonials-marquee:hover{animation-play-state:paused}.testimonial-card{background:#fff;box-shadow:0 10px 30px #0000001a;padding:35px;border-radius:15px;width:380px;text-align:left;display:flex;flex-direction:column;border:1px solid var(--border-color);flex-shrink:0;position:relative;transition:all .3s ease}.testimonial-card:hover{transform:translateY(-5px);box-shadow:0 15px 40px #00000026}.quote-icon{position:absolute;top:20px;right:25px;font-size:4rem;color:var(--primary-color);opacity:.1;font-family:Georgia,serif;line-height:1}.stars-rating{display:flex;gap:5px;margin-bottom:20px}.star{color:#e0e0e0;font-size:1.2rem;transition:color .2s ease}.star.filled{color:#fbbf24}.message{font-size:1rem;color:var(--text-secondary);margin-bottom:25px;line-height:1.7;font-style:italic;position:relative;z-index:1}.student-info{display:flex;align-items:center;gap:15px;margin-top:auto;padding-top:20px;border-top:1px solid var(--border-color)}.student-image{flex-shrink:0}.student-image img{width:60px;height:60px;border-radius:50%;object-fit:cover;border:3px solid var(--primary-color);box-shadow:0 4px 10px #667eea33}.info{text-align:left;flex:1}.name{font-size:1.125rem;font-weight:700;color:var(--text-primary);margin-bottom:3px}.position{font-size:.875rem;color:var(--primary-color);font-weight:500}@keyframes scroll{0%{transform:translate(0)}to{transform:translate(calc(-50% - 15px))}}@media (max-width: 768px){.testimonials .section-header h2{font-size:2rem}.testimonial-card{width:320px;padding:30px}.quote-icon{font-size:3rem}.student-image img{width:50px;height:50px}}header{background-color:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:1000;border-bottom:1px solid var(--border-color)}.header-content{display:flex;justify-content:space-between;align-items:center;height:70px}.logo{font-size:1.5rem;font-weight:700;color:var(--primary-color);text-decoration:none;letter-spacing:-.5px}.link{display:flex;align-items:center;gap:2rem}.link a{text-decoration:none;color:var(--text-secondary);font-weight:500;transition:color .2s ease;font-size:.95rem}.link a:hover{color:var(--primary-color)}.login-btn,.account-btn{background-color:var(--primary-color);color:#fff!important;padding:.5rem 1.25rem;border-radius:var(--radius);transition:all .2s ease!important}.login-btn:hover,.account-btn:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}@media (max-width: 768px){.header-content{height:60px}.logo{font-size:1.25rem}.link{gap:1rem}.link a{font-size:.875rem}}.auth-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 270px);background-color:var(--background-color);padding:2rem}.auth-form{background-color:var(--surface-color);padding:2.5rem;border-radius:var(--radius);box-shadow:var(--shadow-lg);text-align:center;width:100%;max-width:400px;border:1px solid var(--border-color)}.auth-form h2{font-size:1.75rem;color:var(--primary-color);margin-bottom:2rem;font-weight:700}.auth-form form{text-align:left;display:flex;flex-direction:column;gap:1rem}.auth-form label{display:block;margin-bottom:.25rem;font-size:.9rem;font-weight:500;color:var(--text-primary)}.auth-form input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius);font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease;background-color:#f8fafc}.auth-form input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4f46e51a;background-color:#fff}.auth-form button{margin-top:1rem;width:100%}.auth-form p{margin-top:1.5rem;font-size:.9rem;color:var(--text-secondary)}.auth-form p a{color:var(--primary-color);font-weight:500}.auth-form p a:hover{text-decoration:underline}.forgot-password-link{text-align:right;margin-top:.5rem;margin-bottom:.5rem}.forgot-password-link a{color:var(--primary-color);font-size:.875rem;font-weight:500;text-decoration:none}.forgot-password-link a:hover{text-decoration:underline}.auth-container{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 270px);padding:2rem}.auth-card{background-color:var(--surface-color);padding:2.5rem;border-radius:var(--radius);box-shadow:var(--shadow-lg);text-align:center;width:100%;max-width:400px;border:1px solid var(--border-color)}.auth-card h2{font-size:1.75rem;color:var(--primary-color);margin-bottom:.5rem;font-weight:700}.auth-subtitle{color:var(--text-secondary);font-size:.9rem;margin-bottom:2rem}.auth-card form{text-align:left;display:flex;flex-direction:column;gap:1rem}.auth-card .form-group{display:flex;flex-direction:column;gap:.5rem}.auth-card label{font-size:.9rem;font-weight:500;color:var(--text-primary)}.auth-card input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius);font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease;background-color:#f8fafc}.auth-card input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4f46e51a;background-color:#fff}.auth-card button{margin-top:1rem;width:100%}.auth-footer{margin-top:1.5rem}.auth-footer p{font-size:.9rem;color:var(--text-secondary)}.auth-footer a{color:var(--primary-color);font-weight:500;text-decoration:none}.auth-footer a:hover{text-decoration:underline}footer{background-color:#0f172a;color:#94a3b8;padding:3rem 0;text-align:center;margin-top:auto;border-top:1px solid #1e293b}.footer-content{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.footer-content p{margin:0;font-size:.9rem;line-height:1.6}.footer-content a{text-decoration:none;color:#e2e8f0;transition:color .2s ease}.footer-content a:hover{color:var(--primary-color)}.social-links{display:flex;gap:1.5rem;margin-top:.5rem}.social-links a{color:#94a3b8;font-size:1.5rem;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.social-links a:hover{color:var(--primary-color);transform:translateY(-2px)}.about{min-height:100vh}.about-hero{background:linear-gradient(135deg,#667eea,#764ba2);padding:100px 0 80px;text-align:center;color:#fff}.about-hero h1{font-size:3.5rem;font-weight:800;margin-bottom:1rem;letter-spacing:-.02em}.hero-subtitle{font-size:1.3rem;opacity:.95;max-width:700px;margin:0 auto;line-height:1.6}.mission-section{padding:80px 0;background-color:var(--surface-color)}.mission-content{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.mission-text h2{font-size:2.5rem;color:var(--text-primary);margin-bottom:1.5rem;font-weight:700}.mission-text p{font-size:1.1rem;color:var(--text-secondary);line-height:1.8;margin-bottom:1.5rem}.mission-image{display:flex;justify-content:center;align-items:center}.image-placeholder{width:300px;height:300px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:20px;display:flex;align-items:center;justify-content:center;box-shadow:0 20px 60px #667eea4d}.large-icon{font-size:8rem;color:#fff;opacity:.9}.values-section{padding:80px 0;background:linear-gradient(135deg,#f8fafc,#e0e7ff)}.values-section h2{text-align:center;font-size:2.5rem;color:var(--text-primary);margin-bottom:50px;font-weight:700}.values-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}.value-card{background:#fff;padding:40px;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow-md);transition:all .3s ease;border:2px solid transparent}.value-card:hover{border-color:var(--primary-color);transform:translateY(-5px);box-shadow:var(--shadow-lg)}.value-icon{font-size:3rem;color:var(--primary-color);margin-bottom:20px}.value-card h3{font-size:1.5rem;color:var(--text-primary);margin-bottom:15px;font-weight:600}.value-card p{color:var(--text-secondary);line-height:1.6}.stats-section{padding:80px 0;background-color:var(--surface-color)}.stats-section h2{text-align:center;font-size:2.5rem;color:var(--text-primary);margin-bottom:50px;font-weight:700}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px}.stat-box{background:linear-gradient(135deg,#667eea,#764ba2);padding:40px;border-radius:var(--radius);text-align:center;color:#fff;box-shadow:0 10px 30px #667eea4d;transition:transform .3s ease}.stat-box:hover{transform:translateY(-10px)}.stat-box h3{font-size:3rem;font-weight:800;margin-bottom:10px}.stat-box p{font-size:1.1rem;opacity:.95}.team-section{padding:80px 0;background:linear-gradient(135deg,#f8fafc,#e0e7ff)}.team-section h2{text-align:center;font-size:2.5rem;color:var(--text-primary);margin-bottom:50px;font-weight:700}.reasons-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}.reason-item{background:#fff;padding:40px;border-radius:var(--radius);box-shadow:var(--shadow-md);transition:all .3s ease;position:relative;overflow:hidden}.reason-item:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),#764ba2);transform:scaleX(0);transition:transform .3s ease}.reason-item:hover:before{transform:scaleX(1)}.reason-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.reason-number{display:inline-block;font-size:3rem;font-weight:800;background:linear-gradient(135deg,var(--primary-color),#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:15px}.reason-item h3{font-size:1.5rem;color:var(--text-primary);margin-bottom:15px;font-weight:600}.reason-item p{color:var(--text-secondary);line-height:1.6}.about-cta{padding:80px 0;background:linear-gradient(135deg,#667eea,#764ba2);text-align:center;color:#fff}.about-cta h2{font-size:2.5rem;margin-bottom:1rem;font-weight:700}.about-cta p{font-size:1.2rem;margin-bottom:2rem;opacity:.95}.about-cta .common-btn{background:#fff;color:var(--primary-color);padding:1rem 3rem;font-size:1.125rem;border-radius:50px;font-weight:600;box-shadow:0 4px 15px #0003;transition:all .3s ease}.about-cta .common-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}@media (max-width: 768px){.about-hero h1{font-size:2.5rem}.hero-subtitle{font-size:1.1rem}.mission-content{grid-template-columns:1fr;gap:40px}.mission-text h2,.values-section h2,.stats-section h2,.team-section h2,.about-cta h2{font-size:2rem}.image-placeholder{width:250px;height:250px}.large-icon{font-size:6rem}.values-grid,.stats-grid,.reasons-grid{grid-template-columns:1fr}}.profile{background-color:var(--surface-color);padding:40px;border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;max-width:500px;margin:100px auto;text-align:center;border:1px solid var(--border-color)}.profile h2{font-size:2rem;color:var(--primary-color);margin-bottom:30px;font-weight:700}.profile-info{display:flex;flex-direction:column;gap:15px;text-align:left}.profile-info p{font-size:1.1rem;color:var(--text-primary);background-color:var(--background-color);padding:15px;border-radius:var(--radius);border:1px solid var(--border-color)}.profile-info strong{color:var(--primary-color);margin-right:10px}.profile-info button{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;margin-top:10px}.logout-btn{background-color:#ef4444!important}.logout-btn:hover{background-color:#dc2626!important}@media (max-width: 768px){.profile{width:90%;margin:60px auto;padding:20px}}.loading-page{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);position:fixed;top:0;left:0;width:100%;z-index:9999}.modern-loader{display:flex;flex-direction:column;align-items:center;gap:30px}.loader-circle{width:20px;height:20px;border-radius:50%;background:#fff;animation:bounce 1.4s infinite ease-in-out both;display:inline-block;margin:0 8px}.loader-circle:nth-child(1){animation-delay:-.32s}.loader-circle:nth-child(2){animation-delay:-.16s}.loader-text{color:#fff;font-size:24px;font-weight:600;letter-spacing:2px;animation:pulse 1.5s infinite}.loader-info{text-align:center;color:#ffffffe6;font-size:14px;line-height:1.6;max-width:300px;animation:fadeIn .8s ease-in}.loader-info p{margin:5px 0;font-weight:500}@keyframes bounce{0%,80%,to{transform:scale(0);opacity:.5}40%{transform:scale(1);opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.loader-text{font-size:20px}.loader-circle{width:16px;height:16px}}.courses{padding:80px 0;background-color:var(--background-color);min-height:80vh}.courses h2{font-size:2.5rem;color:var(--primary-color);margin-bottom:40px;text-align:center;font-weight:700}.course-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px;padding:0 20px}@media (max-width: 768px){.courses{padding:40px 0}.courses h2{font-size:2rem}}.course-card{background-color:var(--surface-color);box-shadow:var(--shadow-md);border-radius:var(--radius);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;border:1px solid var(--border-color);display:flex;flex-direction:column;height:100%}.course-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.course-image-wrapper{width:100%;height:180px;overflow:hidden}.course-image{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}.course-card:hover .course-image{transform:scale(1.05)}.course-content{padding:20px;display:flex;flex-direction:column;flex-grow:1;text-align:left}.course-content h3{font-size:1.25rem;color:var(--text-primary);margin-bottom:10px;font-weight:600;line-height:1.4}.instructor{font-size:.9rem;color:var(--text-secondary);margin-bottom:5px}.duration{font-size:.9rem;color:var(--text-secondary);margin-bottom:15px}.price{font-size:1.25rem;color:var(--primary-color);font-weight:700;margin-bottom:20px;margin-top:auto}.course-actions{display:flex;flex-direction:column;gap:10px}.course-actions button{width:100%;padding:.75rem;font-size:1rem}.delete-btn{background-color:#ef4444!important}.delete-btn:hover{background-color:#dc2626!important}.course-description{padding:80px 0;background-color:var(--background-color);min-height:80vh}.course-header{display:flex;gap:50px;align-items:flex-start;background-color:var(--surface-color);padding:40px;border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border-color)}.course-image-container{flex:1;max-width:500px}.course-image{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-sm);object-fit:cover;aspect-ratio:16/9}.course-info{flex:1;text-align:left}.course-info h1{font-size:2.5rem;color:var(--text-primary);margin-bottom:20px;line-height:1.2}.course-info .instructor,.course-info .duration,.course-info .price{font-size:1.1rem;color:var(--text-secondary);margin-bottom:10px;font-weight:500}.course-info .price{font-size:1.5rem;color:var(--primary-color);font-weight:700;margin:20px 0}.course-info .description{font-size:1rem;color:var(--text-secondary);line-height:1.6;margin-bottom:30px}.test-mode-banner{background:linear-gradient(135deg,#fef3c7,#fde68a);border:2px solid #f59e0b;border-radius:var(--radius);padding:15px 20px;margin-bottom:25px;display:flex;align-items:center;gap:10px}.test-mode-text{font-size:.95rem;color:#b45309;font-weight:600;line-height:1.5;margin:0}.enroll-btn,.study-btn{padding:1rem 2rem;font-size:1.125rem;width:auto;min-width:200px}@media (max-width: 768px){.course-header{flex-direction:column;padding:20px;gap:30px}.course-image-container{max-width:100%}.course-info h1{font-size:2rem}}.payment-success-page{display:flex;align-items:center;justify-content:center;min-height:80vh;background-color:var(--background-color)}.success-message{background-color:var(--surface-color);padding:50px;border-radius:var(--radius);box-shadow:var(--shadow-lg);text-align:center;max-width:400px;width:90%;border:1px solid var(--border-color)}.success-message h2{font-size:2rem;color:var(--primary-color);margin-bottom:15px;font-weight:700}.success-message p{font-size:1.1rem;color:var(--text-secondary);margin-bottom:10px}.reference-no{font-family:monospace;background-color:var(--background-color);padding:5px 10px;border-radius:4px;display:inline-block;margin-bottom:30px!important;color:var(--text-primary)!important}.success-message a{text-decoration:none;display:inline-block;width:100%}.student-dashboard{padding:80px 0;background-color:var(--background-color);min-height:80vh}.student-dashboard h2{font-size:2.5rem;color:var(--primary-color);margin-bottom:40px;text-align:center;font-weight:700}.dashboard-content{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px;padding:0 20px}.no-course{font-size:1.2rem;color:var(--text-secondary);text-align:center;width:100%;grid-column:1 / -1}@media (max-width: 768px){.student-dashboard{padding:40px 0}.student-dashboard h2{font-size:2rem}}.course-study-page{padding:80px 0;background-color:var(--background-color);min-height:80vh;display:flex;justify-content:center;align-items:center}.course-study-card{background-color:var(--surface-color);padding:40px;border-radius:var(--radius);box-shadow:var(--shadow-lg);border:1px solid var(--border-color);text-align:center;max-width:600px;width:100%;margin:0 auto}.course-study-card .course-image{width:100%;max-width:350px;border-radius:var(--radius);margin-bottom:30px;box-shadow:var(--shadow-md)}.course-study-content h2{font-size:2rem;color:var(--primary-color);margin-bottom:15px;font-weight:700}.course-study-content h4{font-size:1.1rem;color:var(--text-secondary);margin-bottom:10px;font-weight:400}.course-study-content h5{font-size:1rem;color:var(--text-secondary);margin-bottom:5px;font-weight:500}.lectures-btn{display:inline-block;background-color:var(--primary-color);color:#fff;padding:12px 30px;border-radius:var(--radius);text-decoration:none;font-weight:600;margin-top:30px;transition:background-color .2s}.lectures-btn:hover{background-color:var(--primary-hover)}.lecture-page{display:flex;min-height:90vh;background-color:var(--background-color)}.lecture-sidebar{width:350px;background-color:var(--surface-color);border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow-y:auto;height:90vh;position:sticky;top:70px}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.sidebar-header h3{font-size:1.25rem;color:var(--text-primary);font-weight:700}.progress-container{padding:20px;border-bottom:1px solid var(--border-color)}.progress-text{display:flex;justify-content:space-between;margin-bottom:10px;font-size:.9rem;color:var(--text-secondary)}progress{width:100%;height:8px;border-radius:4px;-webkit-appearance:none;-moz-appearance:none;appearance:none}progress::-webkit-progress-bar{background-color:var(--border-color);border-radius:4px}progress::-webkit-progress-value{background-color:var(--primary-color);border-radius:4px}.lectures-list{flex:1;overflow-y:auto;padding:10px}.lecture-item-container{margin-bottom:5px}.lecture-item{padding:15px;border-radius:var(--radius);cursor:pointer;display:flex;align-items:center;gap:10px;transition:background-color .2s}.lecture-item:hover{background-color:#f1f5f9}.active-lecture .lecture-item{background-color:#e0e7ff;border-left:4px solid var(--primary-color)}.lecture-number{font-weight:600;color:var(--text-secondary);min-width:25px}.lecture-title{flex:1;font-size:.95rem;color:var(--text-primary)}.lecture-check{color:#10b981;font-size:1.2rem}.delete-lec-btn{background-color:#ef4444;color:#fff;border:none;padding:5px 10px;border-radius:4px;font-size:.8rem;margin-left:40px;margin-top:5px;cursor:pointer}.lecture-content{flex:1;padding:40px;overflow-y:auto}.video-container{max-width:1000px;margin:0 auto}.video-container video{border-radius:var(--radius);box-shadow:var(--shadow-lg);margin-bottom:30px;background-color:#000}.lecture-details h1{font-size:2rem;color:var(--text-primary);margin-bottom:15px}.lecture-details h3{font-size:1.1rem;color:var(--text-secondary);font-weight:400;line-height:1.6}.select-lecture-msg{display:flex;justify-content:center;align-items:center;height:100%;color:var(--text-secondary);text-align:center}.lecture-form{background-color:var(--surface-color);padding:20px;border-radius:var(--radius);box-shadow:var(--shadow-md);margin-bottom:20px;border:1px solid var(--border-color)}.lecture-form h4{margin-bottom:15px;color:var(--primary-color)}.lecture-form input{width:100%;padding:10px;margin-bottom:15px;border:1px solid var(--border-color);border-radius:var(--radius)}.add-lec-btn{font-size:.9rem;padding:5px 10px}@media (max-width: 768px){.lecture-page{flex-direction:column-reverse}.lecture-sidebar{width:100%;height:auto;position:static;border-right:none;border-top:1px solid var(--border-color)}.lecture-content{padding:20px}}.sidebar{width:250px;height:100vh;background-color:var(--surface-color);border-right:1px solid var(--border-color);position:fixed;top:70px;left:0;padding-top:20px;z-index:100}.sidebar ul{list-style:none;padding:0;margin:0}.sidebar ul li{margin-bottom:5px}.sidebar ul li a{display:flex;align-items:center;padding:12px 25px;color:var(--text-secondary);text-decoration:none;font-weight:500;transition:all .2s;border-left:4px solid transparent}.sidebar ul li a:hover{background-color:#f1f5f9;color:var(--primary-color)}.sidebar ul li a.active{background-color:#e0e7ff;color:var(--primary-color);border-left-color:var(--primary-color)}.sidebar ul li a .icon{margin-right:15px;font-size:1.2rem;display:flex;align-items:center}.dashboard-admin{display:flex;min-height:100vh;padding-top:70px;background-color:var(--background-color)}.main-content{margin-left:250px;padding:40px;width:100%}@media (max-width: 768px){.sidebar{width:60px}.sidebar ul li a span{display:none}.sidebar ul li a{padding:15px;justify-content:center}.sidebar ul li a .icon{margin-right:0}.main-content{margin-left:60px;padding:20px}}.admin-dashboard h1{font-size:2rem;color:var(--text-primary);margin-bottom:30px;font-weight:700}.stats-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}.stats-card{background-color:var(--surface-color);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border-color);text-align:center;transition:transform .2s,box-shadow .2s}.stats-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.stats-card h3{font-size:1.1rem;color:var(--text-secondary);margin-bottom:10px;font-weight:500}.stats-card p{font-size:2.5rem;color:var(--primary-color);font-weight:700}.admin-courses{display:flex;gap:40px;flex-wrap:wrap}.admin-courses .left{flex:1;min-width:300px}.admin-courses .left h1{font-size:2rem;color:var(--text-primary);margin-bottom:30px;font-weight:700}.dashboard-content{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:30px}.admin-courses .right{width:350px;position:sticky;top:90px;align-self:flex-start}.course-form{background-color:var(--surface-color);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow-lg);border:1px solid var(--border-color)}.course-form h2{font-size:1.5rem;color:var(--primary-color);margin-bottom:20px;font-weight:700;text-align:center}.course-form form{display:flex;flex-direction:column}.course-form label{display:block;margin-bottom:5px;font-size:.9rem;color:var(--text-secondary);font-weight:500}.course-form input,.course-form select{width:100%;padding:10px;margin-bottom:15px;border:1px solid var(--border-color);border-radius:var(--radius);font-size:.95rem;transition:border-color .2s}.course-form input:focus,.course-form select:focus{outline:none;border-color:var(--primary-color)}.course-form img{margin-bottom:15px;border-radius:var(--radius);max-width:100%}@media (max-width: 1024px){.admin-courses{flex-direction:column}.admin-courses .right{width:100%;position:static}}.users{padding:20px}.users h1{font-size:2rem;color:var(--text-primary);margin-bottom:30px;font-weight:700}.MuiPaper-root{width:100%;overflow-x:auto;border-radius:var(--radius)!important;box-shadow:var(--shadow-lg)!important;border:1px solid var(--border-color)!important}.MuiTableHead-root .MuiTableCell-root{background-color:var(--primary-color)!important;color:#fff!important;font-weight:600!important;font-size:.95rem!important}.MuiTableBody-root .MuiTableRow-root:hover{background-color:#f1f5f9!important}.MuiButton-root{background-color:var(--primary-color)!important;color:#fff!important;text-transform:none!important;font-weight:500!important;border-radius:var(--radius)!important;padding:6px 16px!important;transition:background-color .2s!important}.MuiButton-root:hover{background-color:var(--primary-hover)!important}@media (max-width: 768px){.MuiTableCell-root{font-size:12px!important;padding:8px!important}.MuiButton-root{font-size:12px!important;padding:6px 12px!important}}@media (max-width: 480px){.MuiTableCell-root{font-size:10px!important;padding:6px!important}.MuiButton-root{font-size:10px!important;padding:4px 8px!important}}