:root{--primary-color: #1a73e8;--secondary-color: #5f6368;--background-color: #f8f9fa;--card-background: #ffffff;--border-color: #dadce0;--text-color: #202124;--text-secondary: #5f6368;--gradient-start: #667eea;--gradient-end: #764ba2}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;color:var(--text-color);line-height:1.6;background:var(--background-color)}.landing-page{min-height:100vh}.container{max-width:1400px;margin:0 auto;padding:0 20px}.hero{background:linear-gradient(135deg,var(--gradient-start) 0%,var(--gradient-end) 100%);color:#fff;padding:80px 20px;text-align:center}.hero-title{font-size:3rem;font-weight:700;margin-bottom:20px}.gradient-text{background:linear-gradient(120deg,#fff 0%,#e0e7ff 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;margin-bottom:40px;opacity:.95;max-width:700px;margin-left:auto;margin-right:auto}.hero-buttons{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.btn{padding:12px 32px;font-size:1rem;font-weight:600;border-radius:8px;text-decoration:none;transition:all .3s ease;border:2px solid transparent;display:inline-block}.btn-primary{background:white;color:var(--gradient-start)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 16px #0003}.btn-secondary{background:transparent;color:#fff;border-color:#fff}.btn-secondary:hover{background:white;color:var(--gradient-start)}.features-section{padding:60px 20px;background:white}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-top:40px}.feature-card{background:var(--background-color);padding:30px;border-radius:12px;text-align:center;transition:transform .2s ease}.feature-card:hover{transform:translateY(-4px)}.feature-icon{font-size:3rem;margin-bottom:15px}.feature-card h3{font-size:1.25rem;margin-bottom:10px;color:var(--text-color)}.feature-card p{color:var(--text-secondary);font-size:.95rem}.demo-section{padding:60px 20px;background:var(--background-color)}.section-title{text-align:center;font-size:2.5rem;margin-bottom:20px;font-weight:700;color:var(--text-color)}.section-subtitle{text-align:center;font-size:1.1rem;color:var(--text-secondary);margin-bottom:40px}.demo-layout{display:grid;grid-template-columns:350px 1fr;gap:30px;margin-top:40px}.controls-panel{background:var(--card-background);border-radius:12px;padding:25px;box-shadow:0 2px 8px #0000000d;height:fit-content;position:sticky;top:20px}.controls-panel h3{font-size:1.25rem;margin-bottom:20px;color:var(--text-color)}.control-group{margin-bottom:20px}.control-group label{display:block;font-size:.9rem;font-weight:600;margin-bottom:8px;color:var(--text-color)}.slider{width:100%;height:6px;border-radius:3px;background:#d3d3d3;outline:none;-webkit-appearance:none}.slider::-webkit-slider-thumb{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--gradient-start);cursor:pointer}.slider::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--gradient-start);cursor:pointer;border:none}.select{width:100%;padding:8px 12px;border:1px solid var(--border-color);border-radius:6px;font-size:.95rem;background:white;cursor:pointer}.select:focus{outline:none;border-color:var(--gradient-start)}.color-picker{width:100%;height:40px;border:1px solid var(--border-color);border-radius:6px;cursor:pointer}.code-preview{margin-top:25px;padding:15px;background:#1e1e1e;border-radius:8px;overflow-x:auto}.code-preview h4{color:#fff;font-size:.9rem;margin-bottom:10px}.code-preview pre{color:#d4d4d4;font-family:Courier New,monospace;font-size:.85rem;margin:0;line-height:1.5}.demo-panel{display:flex;flex-direction:column;gap:25px}.demo-card{background:var(--card-background);border:1px solid var(--border-color);border-radius:12px;padding:25px;box-shadow:0 2px 8px #0000000d}.demo-card h3{font-size:1.5rem;margin-bottom:10px;color:var(--text-color)}.demo-hint{color:var(--text-secondary);font-size:.9rem;margin-bottom:15px}.demo-hint code{background:var(--background-color);padding:2px 6px;border-radius:4px;font-family:Courier New,monospace;font-size:.85em}.output-preview{margin-top:20px;padding:15px;background:var(--background-color);border-radius:8px;border-left:4px solid var(--primary-color)}.output-preview strong{color:var(--text-color);display:block;margin-bottom:10px;font-size:.9rem}.resolved-text{margin:0;white-space:pre-wrap;font-family:Courier New,monospace;font-size:.9rem;line-height:1.6;color:var(--text-secondary)}.data-section{padding:60px 20px;background:white}.data-tree-card{background:var(--card-background);border:1px solid var(--border-color);border-radius:12px;padding:30px;margin-bottom:30px;box-shadow:0 2px 8px #0000000d;max-width:800px;margin-left:auto;margin-right:auto}.data-tree{font-family:Courier New,monospace;font-size:.95rem}.tree-node{display:flex;align-items:center;gap:8px;padding:4px 0;line-height:1.8}.tree-toggle{background:none;border:none;cursor:pointer;padding:0;width:20px;height:20px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:.8rem;transition:transform .2s ease}.tree-toggle:hover{color:var(--primary-color)}.tree-key{color:#06c;font-weight:600}.tree-value{color:#690;margin-left:5px}.tree-children{border-left:2px solid var(--border-color);margin-left:10px;padding-left:5px}.code-example-card{background:var(--card-background);border:1px solid var(--border-color);border-radius:12px;padding:30px;box-shadow:0 2px 8px #0000000d;max-width:800px;margin-left:auto;margin-right:auto}.code-example-card h3{font-size:1.25rem;margin-bottom:15px;color:var(--text-color)}.code-block{background:#1e1e1e;color:#d4d4d4;padding:20px;border-radius:8px;overflow-x:auto;font-family:Courier New,monospace;font-size:.9rem;line-height:1.6;margin:0}.footer{background:var(--text-color);color:#fff;padding:40px 20px;text-align:center}.footer-links{display:flex;gap:30px;justify-content:center;margin-top:20px}.footer-links a{color:#fff;text-decoration:none;opacity:.8;transition:opacity .3s ease}.footer-links a:hover{opacity:1;text-decoration:underline}.theme-buttons{display:flex;flex-wrap:wrap;gap:8px}.theme-btn{flex:1;min-width:80px;padding:8px 12px;border:2px solid;border-radius:6px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease}.theme-btn.active{transform:scale(1.05);box-shadow:0 2px 8px #0003}.theme-btn:hover{transform:translateY(-2px)}.data-editor-layout{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:40px;margin-bottom:40px}.json-editor-card,.tree-visualization-card{background:var(--card-background);border:1px solid var(--border-color);border-radius:12px;padding:25px;box-shadow:0 2px 8px #0000000d}.json-editor-card h3,.tree-visualization-card h3{font-size:1.25rem;margin-bottom:10px;color:var(--text-color)}.hint{font-size:.9rem;color:var(--text-secondary);margin-bottom:15px}.json-editor{width:100%;min-height:400px;padding:15px;font-family:Courier New,monospace;font-size:.9rem;border:1px solid var(--border-color);border-radius:8px;background:#1e1e1e;color:#d4d4d4;resize:vertical}.json-editor:focus{outline:none;border-color:var(--primary-color)}.json-error{margin-top:10px;padding:10px;background:#fee;border-left:4px solid #f00;border-radius:4px;color:#c00;font-size:.9rem}.reset-btn{margin-top:15px;padding:10px 20px;background:var(--primary-color);color:#fff;border:none;border-radius:6px;font-weight:600;cursor:pointer;transition:all .2s ease}.reset-btn:hover{background:var(--gradient-start);transform:translateY(-2px)}.tree-scroll{max-height:400px;overflow-y:auto;padding-right:10px}.tree-scroll::-webkit-scrollbar{width:8px}.tree-scroll::-webkit-scrollbar-track{background:var(--background-color);border-radius:4px}.tree-scroll::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}.tree-scroll::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.tree-type{color:#9333ea;font-size:.85rem;font-style:italic}@media (max-width: 1024px){.demo-layout{grid-template-columns:1fr}.controls-panel{position:relative;top:0}.data-editor-layout{grid-template-columns:1fr}}@media (max-width: 768px){.hero-title{font-size:2rem}.hero-subtitle{font-size:1rem}.section-title{font-size:2rem}.demo-card{padding:20px}.features-grid{grid-template-columns:1fr}.theme-buttons{flex-direction:column}.theme-btn{min-width:100%}}