body{margin:0;padding:0;box-sizing:border-box;font-family:Arial,sans-serif}.common-btn{background-color:#8a4baf;display:flex;color:#fff;border:none;padding:10px 20px;border-radius:5px;cursor:pointer;font-size:16px;transition:background-color .3s ease;margin-top:10px}.common-btn:hover{background-color:#7a3a9f}@media (max-width: 768px){.common-btn{font-size:16px}}.home{background-color:#f5f5f5;padding:100px 0;text-align:center}.home .home-content{max-width:800px;margin:0 auto}.home .home-content h1{font-size:36px;margin-bottom:20px}@media (max-width: 768px){.home .home-content h1{font-size:28px}}.home .home-content p{font-size:18px;color:#666;margin-bottom:40px}@media (max-width: 768px){.home .home-content p{font-size:16px}}.home .home-content button{padding:12px 24px}.home .home-content .common-btn{display:block;margin:0 auto;text-align:center}.testimonials{padding:80px 0;text-align:center}.testimonials h2{font-size:32px;color:#8a4baf;margin-bottom:30px}.testimonials .testimonials-cards{display:flex;flex-wrap:wrap;justify-content:center;gap:30px}.testimonials .testimonials-cards .testimonial-card{background-color:#fff;box-shadow:0 2px 4px #0000001a;padding:20px;border-radius:10px;width:300px;text-align:left;display:flex;flex-direction:column;align-items:center}@media (max-width: 768px){.testimonials .testimonials-cards .testimonial-card{width:80%;text-align:center}}.testimonials .testimonials-cards .testimonial-card .student-image img{width:80px;height:80px;border-radius:50%;object-fit:cover;margin-bottom:10px}.testimonials .testimonials-cards .testimonial-card .message{font-size:16px;color:#333;margin-bottom:10px}.testimonials .testimonials-cards .testimonial-card .info{text-align:center}.testimonials .testimonials-cards .testimonial-card .name{font-size:18px;font-weight:700;color:#8a4baf;margin-bottom:5px}.testimonials .testimonials-cards .testimonial-card .position{font-size:14px;color:#666}header{display:flex;justify-content:space-between;align-items:center;padding:20px;background-color:#fff;box-shadow:0 2px 4px #0000001a;position:relative}.logo{font-size:30px;font-weight:600;color:#8a4baf}.login-link{background-color:#8a4baf;color:#fff!important;padding:8px 20px;border-radius:6px;font-weight:600;box-shadow:0 2px 6px #8a4baf14;transition:background .3s,color .3s}.login-link:hover{background-color:#6c368e;color:#fff!important}@media (max-width: 768px){.logo{font-size:18px}}.link{display:flex;gap:2rem;align-items:center}@media (max-width: 768px){.link{gap:.5rem}}.link a{text-decoration:none;color:#333;transition:.3s;display:flex;align-items:center;font-size:16px}.link a svg{font-size:24px;color:#333;transition:.3s}.link a:hover{color:#8a4baf}.link a:hover svg{color:#8a4baf}.ai-button{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:10px 16px;border-radius:25px;cursor:pointer;font-weight:500;font-size:14px;transition:all .3s ease;box-shadow:0 4px 15px #667eea4d}.ai-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.ai-button svg{width:18px;height:18px}.ai-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.ai-modal{background:#fff;border-radius:20px;width:90%;max-width:500px;height:80%;max-height:600px;display:flex;flex-direction:column;box-shadow:0 20px 60px #0000004d;overflow:hidden}.ai-header{display:flex;align-items:center;justify-content:space-between;padding:20px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.ai-header-info{display:flex;align-items:center;gap:12px}.ai-avatar{font-size:24px;background:#fff3;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center}.ai-header-info h3{margin:0;font-size:18px;font-weight:600}.ai-header-info p{margin:0;font-size:12px;opacity:.8}.ai-header-actions{display:flex;gap:8px}.clear-btn,.close-btn{background:#fff3;border:none;color:#fff;padding:8px;border-radius:8px;cursor:pointer;transition:background .3s ease}.clear-btn:hover,.close-btn:hover{background:#ffffff4d}.ai-messages{flex:1;padding:20px;overflow-y:auto;display:flex;flex-direction:column;gap:16px}.ai-message{display:flex;flex-direction:column;max-width:80%}.ai-message.user{align-self:flex-end}.ai-message.ai{align-self:flex-start}.message-content{padding:12px 16px;border-radius:18px;font-size:14px;line-height:1.4;word-wrap:break-word}.ai-message.user .message-content{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-bottom-right-radius:6px}.ai-message.ai .message-content{background:#f5f5f5;color:#333;border-bottom-left-radius:6px}.message-timestamp{font-size:11px;color:#999;margin-top:4px;align-self:flex-end}.ai-message.ai .message-timestamp{align-self:flex-start}.typing-indicator{display:flex;gap:4px;padding:8px 0}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:#ccc;animation:typing 1.4s infinite ease-in-out}.typing-indicator span:nth-child(1){animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}@keyframes typing{0%,80%,to{transform:scale(.8);opacity:.5}40%{transform:scale(1);opacity:1}}.ai-input-container{padding:20px;border-top:1px solid #eee;display:flex;gap:12px;align-items:flex-end}.ai-input{flex:1;border:2px solid #eee;border-radius:20px;padding:12px 16px;font-size:14px;resize:none;outline:none;transition:border-color .3s ease;font-family:inherit;max-height:100px;min-height:44px}.ai-input:focus{border-color:#667eea}.ai-input:disabled{background:#f9f9f9;cursor:not-allowed}.ai-send-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:50%;width:44px;height:44px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;transition:all .3s ease}.ai-send-btn:hover:not(:disabled){transform:scale(1.1)}.ai-send-btn:disabled{opacity:.5;cursor:not-allowed}.suggested-questions{margin-top:16px;padding:16px;background:#f8f9fa;border-radius:12px;border-left:4px solid #667eea}.suggested-questions p{margin:0 0 12px;font-size:12px;color:#666;font-weight:500}.suggestion-btn{display:block;width:100%;text-align:left;background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:8px 12px;margin-bottom:8px;font-size:13px;color:#333;cursor:pointer;transition:all .2s ease}.suggestion-btn:hover{background:#f0f0f0;border-color:#667eea}.suggestion-btn:last-child{margin-bottom:0}@media (max-width: 768px){.ai-modal{width:95%;height:90%}.ai-header{padding:15px}.ai-header-info h3{font-size:16px}.ai-messages,.ai-input-container{padding:15px}}.ai-messages::-webkit-scrollbar{width:6px}.ai-messages::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.ai-messages::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.ai-messages::-webkit-scrollbar-thumb:hover{background:#a8a8a8}footer{background-color:#8a5baf;color:#fff;padding:20px 0;text-align:center;bottom:0}footer .footer-content{max-width:1200px;margin:0 auto}footer .footer-content p{margin:0;font-size:14px}footer .footer-content a{text-decoration:none;color:inherit}footer .footer-content .social-links{margin-top:10px}footer .footer-content .social-links a{color:#fff;font-size:18px;margin:0 10px;text-decoration:none;transition:color .3s ease}footer .footer-content .social-links a:hover{color:#f5f5f5}.auth-page{display:flex;align-items:center;justify-content:center;height:80vh;background-color:#fff}.auth-page .auth-form{background-color:#fff;padding:30px;border-radius:10px;box-shadow:0 2px 4px #0000001a;text-align:center;width:300px}.auth-page h2{font-size:24px;color:#8a4baf;margin-bottom:15px}.auth-page form{text-align:left}.auth-page form label{display:block;margin-bottom:5px;font-size:14px;color:#333}.auth-page form input{width:92%;padding:10px;margin-bottom:15px;border:1px solid #ccc;border-radius:5px}.auth-page form .common-btn{display:block;margin:0 auto;text-align:center}.about{min-height:100vh;background:linear-gradient(135deg,#f8fafc,#e0e7ff);padding:0 0 40px}.about-hero{background:#8a4baf;color:#fff;padding:60px 20px 40px;text-align:center;border-radius:0 0 40px 40px;margin-bottom:30px}.about-hero h1{font-size:2.8rem;margin-bottom:10px;letter-spacing:2px}.about-hero p{font-size:1.3rem;opacity:.9}.about-content{max-width:900px;margin:0 auto;background:#fff;border-radius:20px;box-shadow:0 8px 32px #8a4baf14;padding:40px 30px}.brand{color:#8a4baf;font-weight:700}.about-features{display:flex;gap:30px;justify-content:center;margin:40px 0;flex-wrap:wrap}.feature-card{background:#f3f0fa;border-radius:16px;padding:30px 20px;text-align:center;width:220px;box-shadow:0 2px 8px #8a4baf12;transition:transform .2s}.feature-card:hover{transform:translateY(-8px) scale(1.03)}.feature-card img{width:150px;margin-bottom:15px}.feature-card h3{color:#8a4baf;margin-bottom:10px}.about-cta{text-align:center;margin-top:40px}.about-cta h2{margin-bottom:20px;color:#8a4baf}.common-btn{background:#8a4baf;color:#fff;border:none;padding:12px 32px;border-radius:8px;font-size:1.1rem;cursor:pointer;transition:background .2s}.about-cta{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;margin-top:40px}.profile{background-color:#fff;padding:20px;border-radius:10px;box-shadow:0 2px 4px #0000001a;width:30%;margin:185px auto}@media (max-width: 768px){.profile{padding:10px;width:80%;margin:90px auto}}.profile-info{text-align:left;margin-top:15px}.profile-info p{margin-bottom:10px;color:#333}.profile-info p strong{color:#8a4baf}.button-container{display:flex;justify-content:space-between;margin-top:20px}.common-btn{display:flex;align-items:center;gap:5px;padding:8px 15px;border:none;border-radius:5px;background-color:#8a4baf;color:#fff;cursor:pointer}.logout-btn{background-color:red}.loading{display:flex;align-items:center;justify-content:center;position:fixed;top:0;right:0;bottom:0;left:0;background:#ffffffb3;z-index:9999}.loader{border:5px solid #f3f3f3;border-top:5px solid #814baf;border-radius:50%;width:50px;height:50px;animation:spin 2s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.courses{padding:80px 0;text-align:center;min-height:60vh}.courses h2{font-size:32px;color:#8a4baf;margin-bottom:30px}.courses .course-container{display:flex;flex-wrap:wrap;justify-content:center;gap:30px}.course-card{width:300px;background-color:#fff;border-radius:16px;box-shadow:0 4px 12px #0000001a;overflow:hidden;padding:16px;margin:20px auto;text-align:center;transition:transform .2s ease-in-out}.course-card:hover{transform:scale(1.02)}.course-image{width:100%;height:180px;object-fit:cover;border-radius:12px;margin-bottom:12px}.course-card h3{font-size:1.3rem;margin:10px 0 6px}.course-card p{font-size:.95rem;color:#555;margin:4px 0}.common-btn1{display:inline-block;margin-top:12px;padding:10px 20px;background-color:#8a4baf;color:#fff;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease}.common-btn2{display:inline-block;margin-top:12px;padding:10px 20px;background-color:red;color:#fff;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease}.common-btn1:hover{background-color:#388e3c}.course-description{padding:80px 0;text-align:center;min-height:55vh}.course-description .course-header{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:20px;margin-bottom:40px}.course-description .course-header .course-image{width:200px;height:150px;object-fit:cover;border-radius:10px}.course-description .course-header .course-info{text-align:left}.course-description .course-header .course-info h2{font-size:24px;color:#333}.course-description .course-header .course-info p{font-size:14px;color:#666;margin:5px 0}.course-description .course-header p{font-size:16px;color:#333;text-align:center;max-width:800px;margin:0 auto}.course-description .course-header .common-btn1{display:inline-block;margin-top:12px;padding:10px 20px;background-color:#8a4baf;color:#fff;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease}.payment-success-page{display:flex;align-items:center;justify-content:center;height:75vh;background-color:#f5f5f5}.payment-success-page .success-message{background-color:#fff;padding:30px;border-radius:10px;box-shadow:0 2px 4px #0000001a;text-align:center;width:300px}.payment-success-page h2{font-size:24px;color:#8a4baf;margin-bottom:15px}.payment-success-page p{font-size:16px;color:#000;margin-bottom:20px}.payment-success-page .common-btn1{display:inline-block;margin-top:12px;padding:10px 20px;background-color:#8a4baf;color:#fff;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:background-color .3s ease}.payment-success-page a{text-decoration:none}.student-dashboard{padding:80px 0;text-align:center;min-height:55vh}.student-dashboard .dashboard-content{display:flex;justify-content:space-around;flex-wrap:wrap;gap:20px;margin-top:40px}.course-study-page{max-width:800px;margin:3rem auto;padding:2rem;border-radius:20px;box-shadow:0 8px 20px #0000001a;background:#fff;text-align:center;animation:fadeIn .5s ease-in-out}.course-study-page img{border-radius:12px;margin-bottom:1.5rem;box-shadow:0 4px 12px #0000001a}.course-study-page h2,.course-study-page h4,.course-study-page h5{color:#8a4baf;margin-bottom:1rem}.course-study-page h2{font-size:2rem;font-weight:700}.course-study-page h4{font-size:1.25rem;font-weight:500}.course-study-page h5{font-size:1rem;font-weight:400}.course-study-page a{text-decoration:none;display:inline-block;margin-top:1.5rem;background-color:#8a4baf;color:#fff;padding:.75rem 2rem;border-radius:30px;transition:background-color .3s ease}.course-study-page a:hover{background-color:#6d3c8f}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 600px){.course-study-page{padding:1rem}.course-study-page h2{font-size:1.5rem}.course-study-page h4{font-size:1.1rem}.course-study-page h5{font-size:.95rem}}.lecture-page{display:flex;justify-content:space-between;min-height:80vh}.lecture-page .left{width:70%;padding:10px;align-items:center}.lecture-page .left video{width:100%;max-height:450px;object-fit:contain;background:#000;border-radius:8px;margin-bottom:20px}.lecture-page .right{width:30%}.lecture-page .right .lecture-form{background-color:#fff;padding:30px;border-radius:10px;box-shadow:0 2px 4px #0000001a;text-align:center;width:auto}.lecture-page .right .lecture-form h2{font-size:24px;color:#8a4baf;margin-bottom:15px}.lecture-page .right .lecture-form form{text-align:left}.lecture-page .right .lecture-form form label{display:block;margin-bottom:5px;font-size:14px;color:#333}.lecture-page .right .lecture-form form input{width:100%;padding:10px;margin-bottom:15px;border:1px solid black;border-radius:5px;box-sizing:border-box}.lecture-page .right .lecture-number{background-color:#fff;padding:10px;border:1px solid black;margin-top:10px;border-radius:5px;text-align:center;cursor:pointer}.lecture-page .right .lecture-number:hover,.lecture-page .right .lecture-number.active{background-color:#8a4baf;color:#fff}.lecture-page .right .common-btn{display:block;text-align:left;margin:10px 0;width:fit-content}.progress{width:20%;background-color:#333;padding:6px;border-radius:5px;margin:3px auto;text-align:center;color:#fff}@media (max-width: 768px){.lecture-page{flex-direction:column;justify-content:center;align-items:center}.lecture-page .left{width:90%}.lecture-page .right{width:80%;margin-bottom:10px}}.progress{width:25%;background-color:#333;padding:6px;border-radius:5px;margin:3px auto;text-align:center;color:#fff}.main-content{display:flex;justify-content:center;align-items:center;flex-wrap:wrap}.main-content .box{margin-left:20px;background-color:#8a4baf;padding:5px;border-radius:5px;text-align:center;margin-top:5px;color:#fff}.main-content .box:hover{background-color:#432456}.sidebar{width:200px;height:100%;left:0;color:#fff;border-right:1px solid gray}@media (max-width: 768px){.sidebar{width:30px}}.sidebar ul{list-style:none;padding:0}.sidebar ul li{margin-bottom:10px;cursor:pointer;padding:12px}@media (max-width: 768px){.sidebar ul li{padding:7px}}.sidebar ul li:hover{background-color:gray}.sidebar ul li a{display:flex;text-decoration:none;counter-reset:blueviolet}.sidebar ul li a span{margin-left:15px}@media (max-width: 768px){.sidebar ul li a span{display:none}}.dashboard-admin{display:flex;min-height:80vh;margin-top:20px}.admin-courses{display:flex;justify-content:center;flex-wrap:wrap;gap:1rem}.admin-courses .left .dashboard-content{display:flex;justify-content:space-around;flex-wrap:wrap;gap:20px;margin-top:40px;margin-left:5px}.admin-courses .right .course-form{background-color:#fff;padding:30px;border-radius:10px;box-shadow:0 2px 4px #0000001a;text-align:center;width:300px}.admin-courses .right .course-form h2{font-size:24px;color:#8a4baf;margin-bottom:15px}.admin-courses .right .course-form form{text-align:left}.admin-courses .right .course-form form label{display:block;margin-bottom:5px;font-size:15px;color:#333}.admin-courses .right .course-form form input,.admin-courses .right .course-form form select{width:92%;padding:10px;margin-bottom:15px;border:1px solid #ccc;border-radius:5px}.users-page{min-height:80vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f8fafc,#e0e7ff)}.users-table-container{background:#fff;padding:40px 20px;border-radius:18px;box-shadow:0 8px 32px #8a4baf14;min-width:350px;max-width:900px;width:100%}.users-table-container h1{text-align:center;color:#8a4baf;margin-bottom:28px;font-size:2rem;letter-spacing:1px}.users-table{width:100%;border-collapse:collapse;font-size:1.05rem}.users-table th,.users-table td{padding:14px 12px;text-align:center}.users-table th{background:#f3f0fa;color:#8a4baf;font-weight:600}.users-table tr:nth-child(2n){background:#f8f6fc}.users-table tr:hover{background:#f3eaff;transition:background .2s}.common-btn{background:#8a4baf;color:#fff;border:none;padding:8px 20px;border-radius:6px;font-size:1rem;cursor:pointer;transition:background .2s}.common-btn:hover{background:#6c3483}