:root{--primary-color: #3182ce;--secondary-color: #2d3748;--background-color: #f7fafc;--text-color: #2d3748;--border-color: #e2e8f0;--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px 0 rgba(0, 0, 0, .06);--error-color: #e53e3e;--success-color: #38a169}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background-color);color:var(--text-color);line-height:1.6}.app{min-height:100vh;display:flex;flex-direction:column}.header{background-color:var(--primary-color);color:#fff;padding:1rem 2rem;box-shadow:var(--shadow)}.header h1{font-size:1.5rem;font-weight:600}.main{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.hero{text-align:center;margin-bottom:3rem}.hero h2{font-size:2.5rem;margin-bottom:1rem;color:var(--secondary-color)}.hero p{font-size:1.25rem;color:#718096}.demo{background-color:#fff;padding:2rem;border-radius:8px;box-shadow:var(--shadow);text-align:center}.demo h3{margin-bottom:1rem;color:var(--secondary-color)}button{background-color:var(--primary-color);color:#fff;border:none;padding:.75rem 1.5rem;font-size:1rem;border-radius:4px;cursor:pointer;transition:background-color .2s}button:hover{background-color:#2c5aa0}button:active{transform:translateY(1px)}.footer{background-color:var(--secondary-color);color:#fff;text-align:center;padding:1rem;margin-top:auto}.footer p{font-size:.875rem}.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem;background-color:var(--background-color)}.auth-card{background:#fff;padding:2rem;border-radius:8px;box-shadow:var(--shadow);width:100%;max-width:400px}.auth-card h1{text-align:center;color:var(--primary-color);margin-bottom:2rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-color)}.form-group input[type=text],.form-group input[type=email],.form-group input[type=password]{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:4px;font-size:1rem;transition:border-color .3s}.form-group input:focus{outline:none;border-color:var(--primary-color)}.form-group input:disabled{background-color:#f0f0f0;cursor:not-allowed}.form-group small{display:block;margin-top:.25rem;color:#666;font-size:.875rem}.form-group input[type=checkbox]{margin-right:.5rem}.error-message{background-color:#fee;color:var(--error-color);padding:.75rem;border-radius:4px;margin-bottom:1rem;font-size:.875rem}button[type=submit]{width:100%;margin-top:.5rem}button[type=submit]:disabled{background-color:#ccc;cursor:not-allowed}.auth-link{text-align:center;margin-top:1.5rem;color:#666}.auth-link a{color:var(--primary-color);text-decoration:none}.auth-link a:hover{text-decoration:underline}.dashboard{padding:2rem;max-width:1200px;margin:0 auto;width:100%}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.dashboard-header h1{color:var(--primary-color)}.logout-btn{padding:.5rem 1rem;background-color:var(--error-color);color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s}.logout-btn:hover{background-color:#c53030}.user-info{background:#fff;padding:1.5rem;border-radius:8px;box-shadow:var(--shadow);margin-bottom:2rem}.user-info h2{color:var(--primary-color);margin-bottom:1rem}.user-info dl{display:grid;grid-template-columns:auto 1fr;gap:.5rem}.user-info dt{font-weight:600;color:#666}.user-info dd{color:var(--text-color)}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.dashboard-card{background:#fff;padding:1.5rem;border-radius:8px;box-shadow:var(--shadow);transition:transform .2s}.dashboard-card:hover{transform:translateY(-2px);box-shadow:0 4px 8px #0000001a}.dashboard-card h3{color:var(--primary-color);margin-bottom:.5rem}.dashboard-card p{color:#666;margin-bottom:1rem}.card-link{color:var(--primary-color);text-decoration:none;font-weight:500}.card-link:hover{text-decoration:underline}.loading{display:flex;justify-content:center;align-items:center;min-height:100vh;font-size:1.2rem;color:#666}