:root{--bg-color: #f0f4f8;--text-primary: #1e293b;--text-secondary: #64748b;--panel-bg: rgba(255, 255, 255, .7);--panel-border: rgba(255, 255, 255, .5);--shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, .05), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-md: 0 10px 15px -3px rgba(0, 0, 0, .05), 0 4px 6px -4px rgba(0, 0, 0, .05);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .05);--primary: #6366f1;--primary-hover: #4f46e5;--primary-light: rgba(99, 102, 241, .1);--json-key: #0ea5e9;--json-string: #10b981;--json-number: #f59e0b;--json-boolean: #ef4444;--json-null: #8b5cf6;--transition-normal: all .3s cubic-bezier(.4, 0, .2, 1);--font-mono: "JetBrains Mono", "Fira Code", "Courier New", monospace;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif}[data-theme=dark]{--bg-color: #0f172a;--text-primary: #f8fafc;--text-secondary: #94a3b8;--panel-bg: rgba(30, 41, 59, .6);--panel-border: rgba(255, 255, 255, .05);--shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, .2), 0 2px 4px -2px rgba(0, 0, 0, .2);--shadow-md: 0 10px 15px -3px rgba(0, 0, 0, .3), 0 4px 6px -4px rgba(0, 0, 0, .3);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 8px 10px -6px rgba(0, 0, 0, .4);--primary: #818cf8;--primary-hover: #6366f1;--primary-light: rgba(129, 140, 248, .15);--json-key: #38bdf8;--json-string: #34d399;--json-number: #fbbf24;--json-boolean: #f87171;--json-null: #a78bfa}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);color:var(--text-primary);line-height:1.5;transition:background-color .3s ease,color .3s ease;min-height:100vh;background:radial-gradient(circle at 15% 50%,rgba(99,102,241,.08),transparent 25%),radial-gradient(circle at 85% 30%,rgba(16,185,129,.08),transparent 25%);background-color:var(--bg-color);background-attachment:fixed}.glass-panel{background:var(--panel-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--panel-border);border-radius:16px;box-shadow:var(--shadow-md);transition:var(--transition-normal)}.glass-panel:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-light)}button{cursor:pointer;border:none;background:none;font-family:inherit;color:inherit;transition:var(--transition-normal);display:flex;align-items:center;justify-content:center;gap:.5rem}button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}input,textarea{font-family:inherit;background:var(--panel-bg);border:1px solid var(--panel-border);color:var(--text-primary);border-radius:8px;padding:.5rem 1rem;transition:var(--transition-normal)}input:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.mono-text{font-family:var(--font-mono)}.editor-container{display:flex;flex-direction:column;height:100%;gap:.5rem}.editor-toolbar{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:12px;background:var(--panel-bg)}.spacer{flex:1}.toolbar-btn{padding:.4rem .8rem;border-radius:8px;font-size:.85rem;font-weight:500;color:var(--text-secondary);background:transparent}.toolbar-btn:hover:not(:disabled){background:#0000000d;color:var(--text-primary)}[data-theme=dark] .toolbar-btn:hover:not(:disabled){background:#ffffff1a}.toolbar-btn:disabled{opacity:.5;cursor:not-allowed}.toolbar-btn.primary-btn{background:var(--primary-light);color:var(--primary)}.toolbar-btn.primary-btn:hover{background:var(--primary);color:#fff}.editor-wrapper{position:relative;flex:1;display:flex;flex-direction:column}.json-input{width:100%;height:100%;flex:1;resize:none;border:1px solid transparent;background:transparent;font-size:14px;line-height:1.6;padding:1rem}.json-input:focus{outline:none;background:#ffffff05}.has-error .json-input{background:#ef44440d;border-color:#ef444433}.error-banner{position:absolute;bottom:0;left:0;right:0;margin:1rem;background:#ef44441a;border-color:#ef44444d;color:#ef4444;padding:.75rem 1rem;display:flex;align-items:center;gap:.5rem;font-size:.9rem;border-radius:8px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.tree-container{display:flex;flex-direction:column;height:100%;width:100%;overflow:hidden}.tree-toolbar{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;border-radius:12px;background:var(--panel-bg);margin-bottom:1rem}.tree-title{font-weight:600;color:var(--text-secondary);font-size:.9rem}.tree-content{flex:1;overflow:auto;font-family:var(--font-mono);font-size:14px;line-height:1.6;padding-bottom:2rem}.node-wrapper{position:relative}.node-line{display:flex;align-items:center;padding:2px 4px;border-radius:6px;cursor:pointer;border:1px solid transparent;transition:background .2s ease,border-color .2s ease;min-height:24px;position:relative}.node-line:hover{background:#00000008}[data-theme=dark] .node-line:hover{background:#ffffff0d}.expand-icon{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;color:var(--text-secondary);margin-left:-20px;transition:color .2s}.node-line:hover .expand-icon{color:var(--primary)}.node-key{color:var(--json-key);font-weight:500;margin-right:.25rem}.key-colon{color:var(--text-secondary);margin-left:2px}.node-value{color:var(--text-primary)}.val-string{color:var(--json-string)}.val-number{color:var(--json-number)}.val-boolean{color:var(--json-boolean)}.val-null{color:var(--json-null);font-weight:700}.val-complex{color:var(--text-secondary);font-style:italic}.node-children{position:relative;border-left:1px solid var(--panel-border);margin-left:.5rem}.node-close{padding-left:4px;color:var(--text-primary)}.icon-btn{padding:4px;border-radius:4px;color:var(--text-secondary);background:transparent}.icon-btn:hover{color:var(--primary);background:var(--primary-light)}.empty-tree{height:100%;display:flex;align-items:center;justify-content:center}.resizer{width:24px;flex-shrink:0;cursor:col-resize;background-color:transparent;position:relative;z-index:10;display:flex;align-items:center;justify-content:center;transition:background-color .2s}.resizer:after{content:"";width:4px;height:30px;border-radius:4px;background-color:var(--panel-border);transition:background-color .2s,height .2s}.resizer:hover:after,.resizer:active:after{background-color:var(--primary);height:40px}.app-container{width:100%;padding:1rem 2rem;height:100vh;overflow:hidden;display:flex;flex-direction:column;gap:1.5rem}.app-header{padding:.5rem 1.5rem;display:flex;justify-content:space-between;align-items:center;border-radius:20px}.header-left{display:flex;align-items:center;gap:1rem}.logo-icon{color:var(--primary)}.app-title{font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,var(--primary) 0%,var(--json-key) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;letter-spacing:-.5px;position:relative;display:inline-block;text-shadow:0 4px 12px var(--primary-light);transition:var(--transition-normal)}.app-title:hover{transform:translateY(-1px);text-shadow:0 6px 16px var(--primary-light)}.theme-toggle{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:transparent;color:var(--primary);border-width:2px}.theme-toggle:hover{background:var(--primary-light);transform:rotate(15deg)}.header-actions{display:flex;align-items:center;gap:.5rem}.app-main{flex:1;min-height:0}@media(max-width:1024px){.app-main{grid-template-columns:1fr}}.editor-section,.visualization-section{display:flex;flex-direction:column;border-radius:24px;overflow:hidden;min-height:0}.panel-header{padding:1rem 1.5rem;border-bottom:1px solid var(--panel-border);background:#00000005;display:flex;justify-content:space-between;align-items:center;height:60px}.panel-header h2{margin:0;font-size:1.1rem;color:var(--text-secondary);font-weight:600;text-transform:uppercase;letter-spacing:1px}.panel-content{flex:1;display:flex;flex-direction:column;padding:1.5rem;overflow:auto;min-height:0}.json-input{flex:1;resize:none;background:transparent;border:1px solid transparent;width:100%;height:100%;min-height:100px;font-size:14px;line-height:1.6}.json-input:focus{border-color:transparent;box-shadow:inset 0 0 0 1px var(--primary-light);background:#ffffff05}.viewer-content{display:flex;align-items:center;justify-content:center}.placeholder-text{color:var(--text-secondary);font-style:italic;font-size:1.1rem;opacity:.7}.visualization-section.fullscreen{position:fixed;inset:1rem;width:calc(100% - 2rem)!important;height:calc(100% - 2rem)!important;z-index:50;box-shadow:var(--shadow-lg)}