:root{--primary-color: #646cff;--primary-hover: #535bf2;--bg-color: #f9f9f9;--card-bg: #ffffff;--text-color: #333333;--text-secondary: #666666;--border-radius: 12px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--error-color: #ef4444;--success-color: #10b981}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-color);color:var(--text-color);line-height:1.5}.app-container{max-width:1200px;margin:0 auto;padding:2rem;display:flex;flex-direction:column;min-height:100vh}.app-header{text-align:center;margin-bottom:3rem}.app-header h1{font-size:2.5rem;margin-bottom:.5rem;background:-webkit-linear-gradient(315deg,#42d392 25%,#647eff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.app-header p{color:var(--text-secondary);font-size:1.1rem}.main-content{display:grid;grid-template-columns:1fr;gap:2rem;flex:1}@media(min-width:768px){.main-content{grid-template-columns:1fr 1fr}}.card{background:var(--card-bg);border-radius:var(--border-radius);padding:1.5rem;box-shadow:var(--shadow-md);transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d}h2{border-bottom:2px solid var(--bg-color);padding-bottom:.5rem;margin-top:0}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-secondary)}.form-group input{width:100%;padding:.75rem;border:1px solid #e5e7eb;border-radius:8px;font-size:1rem;box-sizing:border-box;transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #646cff1a}.submit-btn{width:100%;padding:.75rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .2s}.submit-btn:hover{background-color:var(--primary-hover)}.submit-btn:disabled{background-color:#a5a5a5;cursor:not-allowed}.user-list{list-style:none;padding:0;margin:0}.user-item{padding:1rem;border-bottom:1px solid #f0f0f0;display:flex;align-items:center}.user-item:last-child{border-bottom:none}.user-info h3{margin:0 0 .25rem;font-size:1.1rem}.user-info p{margin:0;color:var(--text-secondary);font-size:.9rem}.message{padding:.75rem;border-radius:8px;margin-top:1rem;font-size:.9rem;text-align:center}.message.success{background-color:#d1fae5;color:#065f46}.message.error{background-color:#fee2e2;color:#991b1b}.loading{text-align:center;color:var(--text-secondary);font-style:italic;padding:2rem}.app-footer{text-align:center;color:var(--text-secondary);font-size:.875rem;margin-top:3rem}