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rgba(41,96,161,.1)}.form-input:focus+.input-icon{color:#2960a1}.error-message{background:#fff2f2;border:1px solid #ffdbdb;color:#d63031;padding:14px 18px;border-radius:12px;font-size:14px;margin-bottom:20px;display:flex;align-items:center;gap:8px}.error-message:before{content:"!";display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;background:#d63031;color:#fff;border-radius:50%;font-weight:700}.submit-button{width:100%;padding:16px;background:#2960a1;color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}.submit-button:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(45deg,hsla(0,0%,100%,.1),hsla(0,0%,100%,.2));transform:translateX(-100%) rotate(45deg);transition:transform .6s ease}.submit-button:hover{background:#245182;transform:translateY(-2px);box-shadow:0 6px 20px rgba(41,96,161,.2)}.submit-button:hover:before{transform:translateX(100%) rotate(45deg)}.submit-button:disabled{opacity:.7;cursor:not-allowed;transform:none;box-shadow:none}.chat-interface{display:flex;flex-direction:column;height:100vh;max-width:1200px;margin:0 auto;padding:20px;background:linear-gradient(180deg,#f8f9ff,#fff)}.user-info-header{background:linear-gradient(135deg,#6366f1,#4f46e5);border-radius:16px;padding:16px;margin-bottom:20px;box-shadow:0 8px 32px rgba(99,102,241,.15);color:#fff;position:relative;overflow:hidden}.user-info-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,hsla(0,0%,100%,.1),hsla(0,0%,100%,0));pointer-events:none}.user-info-left{flex:1 1}.user-welcome h2{font-size:20px;font-weight:600;margin:0 0 12px;color:#fff}.user-details{gap:12px}.detail-item,.user-details{display:flex;align-items:center}.detail-item{gap:8px;background:hsla(0,0%,100%,.1);padding:6px 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h2{color:#333;margin-bottom:16px;font-size:24px}.user-info{margin-bottom:24px}.user-info p{margin:8px 0;color:#666}.enrolled-courses{margin-top:24px}.enrolled-courses h3{color:#333;margin-bottom:16px;font-size:20px}.courses-list{display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.course-item{background:#f8f9fa;border-radius:8px;padding:16px;border:1px solid #e9ecef}.course-title{color:#333;margin-bottom:12px;font-size:16px;font-weight:600}.course-progress{position:relative;height:8px;background:#e9ecef;border-radius:4px;overflow:hidden;margin-top:8px}.progress-bar{position:absolute;top:0;left:0;height:100%;background:#4caf50;transition:width .3s ease}.progress-text{display:block;margin-top:8px;font-size:14px;color:#666}.start-chat{margin-top:24px;text-align:center;color:#666}.messages-list{display:flex;flex-direction:column;gap:16px}.message{display:flex;gap:12px;max-width:80%}.ai-message{align-self:flex-start}.user-message{align-self:flex-end;flex-direction:row-reverse}.message-avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.ai-message .message-avatar{background:#f0f4ff;color:#6366f1}.user-message .message-avatar{background:#6366f1;color:#fff}.avatar-icon{width:24px;height:24px}.user-avatar{font-weight:600;font-size:16px}.message-content{background:#fff;padding:16px 20px;border-radius:12px;box-shadow:0 2px 4px rgba(0,0,0,.05);line-height:1.6;font-size:15px;white-space:pre-wrap}.message-content a{color:#6366f1;text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s ease}.message-content a:hover{border-bottom-color:#6366f1}.message-content strong{color:#4f46e5;font-weight:600}.message-content p{margin:0 0 12px}.message-content p:last-child{margin-bottom:0}.message-content ol,.message-content ul{margin:12px 0;padding-left:24px}.message-content li{margin:8px 0;padding-left:8px}.ai-message .message-content{border:1px solid #e9ecef;background:#fff}.user-message .message-content{background:#6366f1;color:#fff}.user-message .message-content a{color:#fff;border-bottom:1px solid hsla(0,0%,100%,.3)}.user-message .message-content a:hover{border-bottom-color:#fff}.user-message .message-content strong{color:#fff;font-weight:700}.chat-input-form{margin-top:auto;padding:20px;background:#fff;border-radius:16px;box-shadow:0 -2px 16px rgba(0,0,0,.05)}.input-container{display:flex;gap:12px}.chat-input{flex:1 1;padding:14px 20px;border:2px solid #e0e7ff;border-radius:12px;font-size:16px;outline:none;transition:all .3s ease}.chat-input:focus{border-color:#6366f1;box-shadow:0 0 0 4px rgba(99,102,241,.1)}.send-button{width:48px;height:48px;border-radius:12px;background:#6366f1;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.send-button:hover{background:#4f46e5;transform:translateY(-1px)}.send-button:disabled{background:#e0e7ff;cursor:not-allowed;transform:none}.loading-spinner,.send-icon{width:24px;height:24px}.loading-spinner{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@media (max-width:640px){.chat-interface{padding:12px}.user-info-header{flex-direction:column;gap:12px;align-items:flex-start}.logout-button{margin-left:0;justify-content:center}.user-welcome h2{font-size:24px}.detail-item{min-width:100%}.message{max-width:90%}.user-details{flex-direction:column;align-items:stretch}.detail-item,.logout-button{width:100%}}