:root{--bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);--glass-bg: rgba(255, 255, 255, .05);--glass-border: rgba(255, 255, 255, .1);--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent-color: #38bdf8;--accent-hover: #0ea5e9;--error-color: #ef4444;--success-color: #22c55e;--font-family: "Inter", system-ui, -apple-system, sans-serif;--code-font: "Fira Code", monospace}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background:var(--bg-gradient);color:var(--text-primary);min-height:100vh;display:flex;flex-direction:column}header{padding:1.5rem 2rem;border-bottom:1px solid var(--glass-border);background:#0f172acc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:10}h1{font-size:1.5rem;font-weight:700;background:linear-gradient(to right,#38bdf8,#818cf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}nav a{color:var(--text-secondary);text-decoration:none;margin-left:1.5rem;font-size:.9rem;transition:color .2s}nav a:hover{color:var(--accent-color)}main{flex:1;padding:2rem;display:flex;flex-direction:column;gap:1.5rem;max-width:1600px;margin:0 auto;width:100%}.controls{display:flex;gap:1rem;flex-wrap:wrap}button{background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-primary);padding:.6rem 1.2rem;border-radius:.5rem;cursor:pointer;font-weight:500;transition:all .2s;display:flex;align-items:center;gap:.5rem}button:hover{background:#ffffff1a;border-color:var(--accent-color);color:var(--accent-color)}button.primary{background:var(--accent-color);color:#0f172a;border-color:var(--accent-color)}button.primary:hover{background:var(--accent-hover)}.workspace{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;flex:1;min-height:600px}.panel{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:1rem;display:flex;flex-direction:column;overflow:hidden;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.panel-header{padding:.8rem 1.2rem;border-bottom:1px solid var(--glass-border);font-size:.9rem;font-weight:600;color:var(--text-secondary);display:flex;justify-content:space-between;align-items:center}textarea{flex:1;background:transparent;border:none;color:var(--text-primary);padding:1rem;font-family:var(--code-font);font-size:.9rem;resize:none;outline:none;line-height:1.5}.tree-view{flex:1;padding:1rem;overflow:auto;font-family:var(--code-font);font-size:.9rem}.json-tree-item{margin-left:1.5rem;line-height:1.6}.json-key{color:#93c5fd}.json-string{color:#86efac}.json-number{color:#fca5a5}.json-boolean{color:#fcd34d}.json-null{color:#cbd5e1}.json-toggle{background:transparent;border:none;color:var(--text-secondary);width:1.2rem;height:1.2rem;padding:0;margin-left:-1.2rem;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:.8rem}.json-toggle:hover{color:var(--accent-color);background:transparent}.collapsed{opacity:.7}.error-message{background:#ef44441a;border:1px solid rgba(239,68,68,.2);color:#fca5a5;padding:1rem;border-radius:.5rem;margin-bottom:1rem;display:none}footer{padding:2rem;text-align:center;color:var(--text-secondary);font-size:.9rem;border-top:1px solid var(--glass-border)}@media(max-width:768px){.workspace{grid-template-columns:1fr;min-height:auto}.panel{min-height:400px}}