*{margin:0;padding:0;box-sizing:border-box}:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.6;font-weight:400;--primary: #646cff;--primary-hover: #535bf2;--primary-light: #747bff;--secondary: #10b981;--danger: #ef4444;--danger-hover: #dc2626;--warning: #f59e0b;--success: #10b981;--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--bg-dark: #111827;--bg-card: #ffffff;--text-primary: #111827;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--text-inverse: #ffffff;--border: #e5e7eb;--border-light: #f3f4f6;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px -1px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--radius-sm: .375rem;--radius: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--space-xs: .5rem;--space-sm: .75rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:dark){:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-card: #1e293b;--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-tertiary: #94a3b8;--border: #334155;--border-light: #1e293b;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow: 0 1px 3px 0 rgba(0, 0, 0, .4), 0 1px 2px -1px rgba(0, 0, 0, .4);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -2px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -4px rgba(0, 0, 0, .4);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 8px 10px -6px rgba(0, 0, 0, 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Code,Consolas,Monaco,monospace;background-color:var(--bg-secondary);padding:var(--space-lg);border-radius:var(--radius-md);overflow-x:auto;border:1px solid var(--border)}pre code{background:none;padding:0}::selection{background-color:var(--primary);color:#fff}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--text-tertiary);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.app-container{min-height:100vh;background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%)}.hero{text-align:center;padding:var(--space-3xl) var(--space-xl);background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' 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2rem;font-size:1rem;font-weight:600;background:#fff;color:#667eea}.hero-actions button:hover{transform:translateY(-2px);box-shadow:0 10px 25px #0003}.hero-actions .secondary{background:#ffffff1a;color:#fff;border:2px solid rgba(255,255,255,.3);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.hero-actions .secondary:hover{background:#fff3}.container{max-width:1400px;margin:0 auto;padding:var(--space-2xl) var(--space-xl)}.features-section{margin-bottom:var(--space-3xl)}#features,#quickstart,#demo{scroll-margin-top:var(--space-xl)}.section-title{text-align:center;font-size:2.5rem;margin-bottom:var(--space-sm);color:var(--text-primary)}.section-subtitle{text-align:center;font-size:1.125rem;color:var(--text-secondary);margin-bottom:var(--space-2xl);max-width:600px;margin-left:auto;margin-right:auto}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-xl);margin-bottom:var(--space-3xl)}.feature-card{background:var(--bg-card);padding:var(--space-xl);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow);transition:all .3s ease}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--primary)}.feature-icon{font-size:2.5rem;margin-bottom:var(--space-md);display:block}.feature-card h3{font-size:1.25rem;margin-bottom:var(--space-sm);color:var(--text-primary)}.feature-card p{color:var(--text-secondary);line-height:1.6}.code-example{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-xl);margin-bottom:var(--space-2xl);box-shadow:var(--shadow-md)}.code-example h3{margin-bottom:var(--space-md);font-size:1.125rem;color:var(--text-primary)}.code-example pre{margin:0;font-size:.875rem;line-height:1.6}.demo-section{margin-bottom:var(--space-3xl)}.demo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(450px,1fr));gap:var(--space-xl)}@media(max-width:1024px){.demo-grid{grid-template-columns:1fr}}.demo-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-xl);box-shadow:var(--shadow-md);transition:all .3s ease;display:flex;flex-direction:column;min-height:600px;max-height:600px;overflow:hidden}.demo-card:hover{box-shadow:var(--shadow-xl)}.demo-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-lg);padding-bottom:var(--space-md);border-bottom:2px solid var(--border);flex-shrink:0;gap:var(--space-md);min-width:0}.demo-header h2{font-size:1.5rem;margin:0;color:var(--text-primary);white-space:nowrap}.demo-count{background:var(--primary);color:#fff;padding:.25rem .75rem;border-radius:2rem;font-size:.875rem;font-weight:600}.input-group{display:flex;flex-direction:column;gap:var(--space-sm);margin-bottom:var(--space-lg);flex-shrink:0}.input-row{display:flex;gap:var(--space-sm)}.button-group{display:flex;gap:var(--space-sm);flex-wrap:wrap}button.small{padding:.375rem .75rem;font-size:.8125rem}button.icon-button{width:2rem;height:2rem;min-width:2rem;padding:0;font-size:1.5rem;display:flex;align-items:center;justify-content:center}.items-list{display:flex;flex-direction:column;gap:var(--space-sm);flex:1;overflow-y:auto;overflow-x:hidden;min-height:0}.empty-state{text-align:center;padding:var(--space-3xl) var(--space-lg);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;flex:1}.empty-state p{margin:0;font-size:.9375rem}.todo-item{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-md);background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);transition:all .2s ease;min-width:0}.todo-item:hover{background:var(--bg-tertiary);transform:translate(4px)}.todo-item.completed{opacity:.6}.todo-item.completed .todo-text{text-decoration:line-through}.todo-checkbox{flex-shrink:0}.todo-text{flex:1;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}.todo-time{font-size:.75rem;color:var(--text-tertiary);flex-shrink:0;white-space:nowrap}.user-item{padding:var(--space-lg);background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);transition:all .2s ease;min-width:0}.user-item:hover{background:var(--bg-tertiary);box-shadow:var(--shadow)}.user-content{display:flex;justify-content:space-between;align-items:start;gap:var(--space-md);min-width:0}.user-info{flex:1;min-width:0}.user-info h4{margin:0 0 var(--space-xs) 0;color:var(--text-primary);font-size:1.125rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-email{color:var(--text-secondary);font-size:.875rem;margin-bottom:var(--space-xs);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-age{color:var(--text-tertiary);font-size:.8125rem;font-weight:500;white-space:nowrap}.debug-panel{background:linear-gradient(135deg,#1e293b,#0f172a);border-radius:var(--radius-lg);padding:var(--space-xl);margin-top:var(--space-3xl);box-shadow:var(--shadow-xl);border:1px solid rgba(100,108,255,.2)}.debug-header{margin-bottom:var(--space-lg)}.debug-header h3{color:#f1f5f9;font-size:1.5rem;margin:0;font-weight:600}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--space-md);margin-bottom:var(--space-xl)}.stat-card{background:#ffffff0d;padding:var(--space-md);border-radius:var(--radius);border:1px solid rgba(255,255,255,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.stat-label{font-size:.75rem;color:#94a3b8;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.25rem}.stat-value{font-size:1.5rem;font-weight:700;color:#f1f5f9}.stat-value.success{color:#10b981}.stat-value.warning{color:#f59e0b}.stat-value.danger{color:#ef4444}.debug-details{margin-top:var(--space-lg)}.debug-details summary{cursor:pointer;font-weight:600;color:#cbd5e1;padding:var(--space-md);background:#ffffff0d;border-radius:var(--radius);transition:all .2s ease;list-style:none;display:flex;align-items:center;gap:var(--space-sm)}.debug-details summary::-webkit-details-marker{display:none}.debug-details summary:before{content:"▶";display:inline-block;transition:transform .2s ease}.debug-details[open] summary:before{transform:rotate(90deg)}.debug-details summary:hover{background:#ffffff1a}.debug-data{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--space-md);margin-top:var(--space-md)}.debug-data pre{background:#0000004d;border:1px solid rgba(255,255,255,.1);max-height:300px;overflow:auto;margin:0}.debug-data code{color:#cbd5e1;font-size:.8125rem}.loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;padding:var(--space-2xl);color:var(--text-secondary)}.loading-spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:var(--space-md)}@keyframes spin{to{transform:rotate(360deg)}}.error-state{padding:var(--space-lg);background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius);color:var(--danger)}.footer{text-align:center;padding:var(--space-2xl) var(--space-xl);color:var(--text-secondary);border-top:1px solid var(--border);margin-top:var(--space-3xl)}.footer a{color:var(--primary);font-weight:600}@media(max-width:768px){.hero-title{font-size:2.5rem}.hero-subtitle{font-size:1rem}.section-title{font-size:2rem}.features-grid,.demo-grid{grid-template-columns:1fr}.demo-card{min-height:auto;max-height:none}.input-row,.button-group{flex-direction:column}.button-group button{width:100%}}