body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}body{-webkit-tap-highlight-color:transparent;background:#f5f7fa;color:#333;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;margin:0;padding:0;touch-action:manipulation}.container{margin:0 auto;max-width:1200px;padding:0 20px}.app{display:flex;flex-direction:column;min-height:100vh}main.container{display:flex;flex:1 1;flex-direction:column;padding:2rem 20px}.app-header{background-color:#2c3e50;box-shadow:0 2px 10px #0000001a;color:#fff;padding:1.5rem 0}.app-header h1{font-size:2rem;font-weight:600;margin:0;text-align:center}.app-footer{background-color:#34495e;color:#fffc;font-size:.9rem;padding:1rem 0;text-align:center}.home-screen{align-items:center;display:flex;flex:1 1;flex-direction:column;justify-content:center;padding:2rem 0}.welcome-message{margin-bottom:3rem;text-align:center}.welcome-message h2{color:#2c3e50;font-size:2.5rem;margin-bottom:.5rem}.welcome-message p{color:#7f8c8d;font-size:1.2rem}.big-buttons{gap:1.5rem;max-width:400px;width:100%}.big-button,.big-buttons{display:flex;flex-direction:column}.big-button{align-items:center;border:none;border-radius:16px;box-shadow:0 4px 6px #0000001a;color:#fff;cursor:pointer;font-size:1.5rem;font-weight:600;justify-content:center;padding:2rem;text-align:center;transition:all .2s ease}.big-button:active{box-shadow:0 2px 4px #0000001a;transform:translateY(2px)}.big-button.sign-in{background-color:#2ecc71}.big-button.sign-in:hover{background-color:#27ae60}.big-button.sign-out{background-color:#e74c3c}.big-button.sign-out:hover{background-color:#c0392b}.big-button .icon{font-size:2.5rem;margin-bottom:.5rem}.big-button .button-text{font-size:1.8rem;margin-bottom:.5rem}.big-button .description{font-size:1rem;font-weight:400;opacity:.8}.help-text{color:#7f8c8d;font-size:1.1rem;margin-top:3rem;text-align:center}.screen-header{align-items:center;border-bottom:1px solid #eee;display:flex;justify-content:space-between;margin-bottom:2rem;padding-bottom:1rem}.screen-header h2{color:#2c3e50;font-size:1.8rem;margin:0}.back-button{background-color:#ecf0f1;border:none;border-radius:8px;color:#2c3e50;cursor:pointer;font-size:1.1rem;font-weight:500;padding:.8rem 1.5rem;transition:background-color .2s}.back-button:hover{background-color:#dde4e6}.back-button.centered{display:block;margin:0 auto}.big-form{margin:0 auto;max-width:600px;width:100%}.form-group{margin-bottom:2rem}.form-group label{color:#2c3e50;display:block;font-size:1.2rem;font-weight:500;margin-bottom:.8rem}.form-group input{background-color:#f9f9f9;border:2px solid #ddd;border-radius:8px;font-size:1.3rem;padding:1rem;transition:border-color .2s,background-color .2s;width:100%}.form-group input:focus{background-color:#fff;border-color:#3498db;outline:none}.form-actions{margin-top:3rem;text-align:center}.submit-button{background-color:#3498db;border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:1.3rem;font-weight:500;min-width:200px;padding:1rem 2rem;transition:background-color .2s}.submit-button:hover:not(:disabled){background-color:#2980b9}.submit-button:disabled{cursor:not-allowed;opacity:.6}.message{animation:fadeIn .3s ease;border-radius:8px;font-size:1.1rem;font-weight:500;margin-bottom:2rem;padding:1rem;text-align:center}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.message.success{background-color:#d4edda;border:1px solid #c3e6cb;color:#155724}.message.error{background-color:#f8d7da;border:1px solid #f5c6cb;color:#721c24}.visitor-list-container{display:flex;flex:1 1;flex-direction:column}.error,.loading,.no-visitors{align-items:center;color:#7f8c8d;display:flex;flex:1 1;flex-direction:column;font-size:1.2rem;justify-content:center;padding:3rem;text-align:center}.error{color:#e74c3c}.no-visitors p{margin-bottom:2rem}.visitor-list{flex:1 1}.visitor-list .instruction{color:#7f8c8d;font-size:1.2rem;margin-bottom:2rem;text-align:center}.visitor-list ul{display:flex;flex-direction:column;gap:1rem;list-style:none;margin:0;padding:0}.visitor-button{align-items:center;background-color:#fff;border:1px solid #e1e1e1;border-radius:12px;box-shadow:0 2px 5px #0000000d;cursor:pointer;display:flex;justify-content:space-between;padding:1.5rem;text-align:left;transition:all .2s ease;width:100%}.visitor-button:hover{background-color:#f8f9fa;box-shadow:0 4px 8px #0000001a;transform:translateY(-2px)}.visitor-button:active{transform:translateY(0)}.visitor-info{display:flex;flex-direction:column;gap:.3rem}.visitor-name{color:#2c3e50;font-size:1.4rem;font-weight:500}.visitor-course{color:#7f8c8d;font-size:1rem}.sign-out-icon{color:#e74c3c;font-size:1.5rem;margin-left:1rem}@media (min-width:768px){.big-buttons{max-width:500px}.big-button{padding:2.5rem}.big-form{max-width:700px}}@media (max-width:480px){.app-header h1{font-size:1.6rem}.welcome-message h2{font-size:2rem}.big-button{padding:1.5rem}.big-button .button-text,.screen-header h2{font-size:1.5rem}.back-button{font-size:1rem;padding:.6rem 1.2rem}.form-group label{font-size:1.1rem}.form-group input{font-size:1.1rem;padding:.8rem}.submit-button{font-size:1.1rem;padding:.8rem 1.5rem}.visitor-name{font-size:1.2rem}}
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