p.qr-instruction{margin:20px 0;text-align:center}#qr-code{display:flex;justify-content:center;align-items:flex-start}#qr-code img{max-height:50vh;width:auto}.qr-activation-page{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:linear-gradient(135deg,#28a745 0%,#20c997 100%);min-height:100vh;margin:0;padding:0}.qr-activation-container{max-width:600px;margin:0 auto;padding:20px;min-height:100vh}.class-info-section{text-align:center;margin-bottom:30px;padding:20px;background:linear-gradient(135deg,#28a745 0%,#20c997 100%);border-radius:12px;color:#fff;box-shadow:0 4px 15px rgb(40 167 69 / .3)}.class-info-section h2{margin:0;font-size:1.5rem;font-weight:600;text-shadow:0 2px 4px rgb(0 0 0 / .1)}.qr-activation-content{display:flex;flex-direction:column;justify-content:center}.qr-activation-header{text-align:center;margin-bottom:30px}.qr-activation-header h1{color:#fff;font-size:1.8rem;line-height:2rem;text-transform:uppercase;margin:0;margin-top:50px;text-shadow:0 2px 4px rgb(0 0 0 / .3)}.qr-activation-content{background:#fff;border-radius:15px;padding:30px;box-shadow:0 10px 30px rgb(0 0 0 / .2)}.courses-section{margin-bottom:30px;padding:20px;background:#f8f9fa;border-radius:10px;border-left:4px solid #28a745}.courses-section h3{margin:0 0 15px 0;color:#333;font-size:1.2rem}.courses-list{margin:0;padding:0;list-style:none}.courses-list li{padding:5px 0;color:#555;font-size:1rem}.auth-section{margin-bottom:30px}.auth-tabs{display:flex;margin-bottom:20px;border-bottom:2px solid #e9ecef}.tab-button{flex:1;padding:15px 20px;background:none;border:none;font-size:1.1rem;font-weight:500;color:#6c757d;cursor:pointer;transition:all 0.3s ease;border-bottom:3px solid #fff0}.tab-button:hover{color:#495057;background:#f8f9fa}.tab-button.active{color:#007bff;border-bottom-color:#007bff;background:#f8f9fa}.tab-content{display:none}.tab-content.active{display:block}.auth-form{padding:20px 0}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:#333}.form-group label .required{color:#dc3545;font-weight:700}.form-group input{width:100%;padding:12px 15px;border:2px solid #e9ecef;border-radius:8px;font-size:1rem;transition:border-color 0.3s ease;box-sizing:border-box}.form-group input:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 3px rgb(0 123 255 / .1)}.form-group input:invalid{border-color:#dc3545}.form-group input:valid{border-color:#28a745}.form-group input[name="confirm_password"]{position:relative}.form-group input[name="confirm_password"]:not(:placeholder-shown){border-color:#dc3545}.form-group input[name="confirm_password"]:not(:placeholder-shown):valid{border-color:#28a745}.form-group .validation-message{font-size:.875rem;margin-top:5px;display:none}.form-group .validation-message.error{color:#dc3545;display:block}.form-group .validation-message.success{color:#28a745;display:block}.button:disabled{opacity:.6;cursor:not-allowed}.button.loading{position:relative;color:#fff0}.button.loading::after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:20px;height:20px;border:2px solid #fff;border-top:2px solid #fff0;border-radius:50%;animation:spin 1s linear infinite}.button{display:inline-block;padding:12px 30px;background:#28a745;color:#fff;text-decoration:none;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:all 0.3s ease;width:100%}.button:hover,button:hover,input[type="submit"]:hover,input[type="button"]:hover{background:#1e7e34;transform:translateY(-2px);box-shadow:0 4px 12px rgb(40 167 69 / .3)}.button-primary,button.button-primary,input[type="submit"].button-primary,input[type="button"].button-primary{background:#28a745}.button-primary:hover,button.button-primary:hover,input[type="submit"].button-primary:hover,input[type="button"].button-primary:hover{background:#1e7e34;box-shadow:0 4px 12px rgb(40 167 69 / .3)}.instructions{text-align:center;margin-top:20px;padding:15px;background:#e3f2fd;border-radius:8px;color:#1976d2}.loading-message{text-align:center;padding:20px;background:#f8f9fa;border-radius:8px;margin:20px 0}.spinner{width:40px;height:40px;border:4px solid #f3f3f3;border-top:4px solid #007bff;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 15px}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}.result-message{padding:15px;border-radius:8px;margin:20px 0;text-align:center}.result-message.success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.result-message.error{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}button#cancel-activation{background:#fff;border:1px solid gray;color:gray}#result-message{max-width:600px;margin:20px auto;padding:25px;border-radius:15px;text-align:center;font-size:1.1rem;line-height:1.6;box-shadow:0 6px 20px rgb(0 0 0 / .15);transition:all 0.4s ease;position:relative;overflow:hidden}#result-message::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#28a745,#20c997)}#result-message.success{background:linear-gradient(135deg,#d4edda 0%,#c3e6cb 100%);border:2px solid #28a745;color:#155724;box-shadow:0 6px 20px rgb(40 167 69 / .2)}#result-message.success::before{background:linear-gradient(90deg,#28a745,#20c997)}#result-message.success::after{content:'✅';font-size:1.5em;margin-right:10px;vertical-align:middle}#result-message.error{background:linear-gradient(135deg,#f2e0e1 0%,#f6f1f2 100%);border:2px solid #dc3545;color:#721c24;box-shadow:0 6px 20px rgb(220 53 69 / .2)}#result-message.error::before{background:linear-gradient(90deg,#dc3545,#fd7e14)}#result-message.error::after{content:'❌';font-size:1.5em;margin-right:10px;vertical-align:middle}#result-message p{margin:0;font-weight:600;text-shadow:0 1px 2px rgb(0 0 0 / .1)}#result-message.show{display:block!important;animation:slideInDown 0.6s cubic-bezier(.25,.46,.45,.94)}@keyframes slideInDown{from{opacity:0;transform:translateY(-30px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}#result-message:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgb(0 0 0 / .2)}.dashboard-actions{text-align:center;margin:30px 0}.dashboard-button{background:linear-gradient(135deg,#28a745 0%,#20c997 100%);border:none;padding:15px 30px;font-size:1.1rem;font-weight:600;border-radius:25px;color:#fff;text-decoration:none;display:inline-block;transition:all 0.3s ease;box-shadow:0 4px 15px rgb(40 167 69 / .3);position:relative;overflow:hidden}.dashboard-button::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgb(255 255 255 / .2),transparent);transition:left 0.5s}.dashboard-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgb(40 167 69 / .4);color:#fff;text-decoration:none}.dashboard-button:hover::before{left:100%}.dashboard-button:active{transform:translateY(0);box-shadow:0 2px 10px rgb(40 167 69 / .3)}.activation-success{text-align:center;padding:20px}.activation-success h2{color:#28a745;margin-bottom:20px}.courses-activated{margin:20px 0;padding:20px;background:#f8f9fa;border-radius:10px;text-align:left}.courses-activated h3{margin:0 0 15px 0;color:#333}.courses-activated ul{margin:0;padding:0;list-style:none}.courses-activated li{padding:5px 0;color:#555}.access-section{margin-top:30px}.access-section .button{background:#28a745;font-size:1.1rem;padding:15px 30px}.access-section .button:hover{background:#1e7e34;box-shadow:0 4px 12px rgb(40 167 69 / .3)}@media (max-width:768px){.qr-activation-container{padding:15px}.qr-activation-header h1{font-size:1.5rem;line-height:1.8rem}.qr-activation-content{padding:20px}.tab-button{padding:12px 15px;font-size:1rem}}.qr-activation-error{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:linear-gradient(135deg,#ff6b6b 0%,#ee5a24 100%);min-height:100vh;margin:0;padding:0;display:flex;align-items:center;justify-content:center}.qr-activation-error .qr-activation-container{max-width:500px;padding:20px}.qr-activation-error .error-message{background:#fff;border-radius:15px;padding:40px;text-align:center;box-shadow:0 10px 30px rgb(0 0 0 / .2)}.qr-activation-error .error-message h1{color:#dc3545;margin-bottom:20px;font-size:1.6rem}.qr-activation-error .error-message p{color:#666;margin-bottom:30px;font-size:1.1rem;line-height:1.6}.activation-confirmation{max-width:500px;margin:0 auto;padding:30px;background:#fff;border-radius:12px;box-shadow:0 4px 20px rgb(0 0 0 / .1);text-align:center}.activation-confirmation h3{color:#28a745;margin-bottom:20px;font-size:1.5rem;font-weight:600}.confirmation-info{margin-bottom:30px}.confirmation-info p{color:#666;margin-bottom:20px;font-size:1rem}.user-info{background:#f8f9fa;padding:20px;border-radius:8px;border:1px solid #e9ecef;text-align:left}.user-info-item{margin-bottom:10px;padding:8px 0;border-bottom:1px solid #e9ecef}.user-info-item:last-child{border-bottom:none;margin-bottom:0}.user-info-item strong{color:#495057;display:inline-block;width:120px;font-weight:600}.confirmation-actions{display:flex;gap:15px;justify-content:center;flex-wrap:wrap}.confirmation-actions .button{min-width:140px;padding:12px 20px}.button-secondary{background:#6c757d;color:#fff}.button-secondary:hover{background:#5a6268;color:#fff}@media (max-width:480px){.activation-confirmation{padding:20px;margin:10px}.confirmation-actions{flex-direction:column}.confirmation-actions .button{width:100%}.user-info-item strong{width:100px;font-size:.9rem}}