:root {
  --bg: #0f1117;
  --bg-card: #181b26;
  --bg-input: #0c0e16;
  --text: #e0e4ec;
  --text-secondary: #8a90a4;
  --text-muted: #5a5f72;
  --primary: #f97316;
  --primary-light: #fb923c;
  --border: rgba(249,115,22,0.08);
  --border-strong: rgba(249,115,22,0.2);
  --shadow: 0 4px 14px rgba(0,0,0,0.4);
  --radius: 10px;
  --font: 'Inter',-apple-system,sans-serif;
  --mono: 'JetBrains Mono',monospace;
  --transition: 0.2s ease;
  --glass: rgba(24,27,38,0.92);
  --error: #f43f5e;
  --key: #f97316;
  --string: #34d399;
  --number: #60a5fa;
}

@media(prefers-color-scheme:light){
  :root{--bg:#f8f9fb;--bg-card:#fff;--bg-input:#f1f3f5;--text:#1e1e2e;--text-secondary:#5c5c70;--border:rgba(249,115,22,0.12);--shadow:0 4px 14px rgba(0,0,0,0.06);--glass:rgba(255,255,255,0.92)}
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow:hidden}

.header{background:var(--glass);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.header-inner{padding:8px 16px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:8px}
.logo h1{font-size:1rem;font-weight:700;color:var(--primary-light)}
.header-actions{display:flex;gap:4px}

.btn,.btn-sm{padding:5px 10px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text-secondary);font-family:var(--font);font-size:0.75rem;font-weight:500;cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn:hover,.btn-sm:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:rgba(249,115,22,0.08);border-color:var(--primary);color:var(--primary-light)}
.btn.primary:hover{background:rgba(249,115,22,0.15)}
.btn-sm{padding:3px 8px;font-size:0.7rem}

.app-layout{display:flex;height:calc(100vh - 48px)}
.panel{flex:1;display:flex;flex-direction:column;min-width:0}
.panel:first-child{border-right:1px solid var(--border)}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;border-bottom:1px solid var(--border)}
.panel-header h2{font-size:0.78rem;font-weight:600;color:var(--primary-light)}
.badge{font-size:0.65rem;padding:2px 6px;border-radius:4px;background:rgba(249,115,22,0.08);color:var(--text-muted)}

.code-area{flex:1;padding:12px;background:var(--bg-input);color:var(--text);font-family:var(--mono);font-size:0.78rem;line-height:1.6;border:none;resize:none;overflow:auto;tab-size:2;white-space:pre}
.code-area:focus{outline:none}
textarea.code-area{display:block;width:100%;height:100%;min-height:0}

.panel-footer{padding:8px 14px;border-top:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.filter-row{display:flex;gap:6px;margin-left:auto}
.filter-label{font-size:0.68rem;color:var(--text-muted);display:flex;align-items:center;gap:4px}
.date-input{padding:3px 6px;border:1px solid var(--border);border-radius:4px;background:transparent;color:var(--text-secondary);font-family:var(--font);font-size:0.7rem}

/* JSON Highlighting */
.json-key{color:var(--key)}
.json-string{color:var(--string)}
.json-number{color:var(--number)}
.json-bool{color:var(--primary-light)}
.json-null{color:var(--text-muted)}

.error-bar{padding:8px 14px;background:rgba(244,63,94,0.08);border-top:1px solid rgba(244,63,94,0.2);color:var(--error);font-size:0.78rem}

@media(max-width:640px){
  .app-layout{flex-direction:column}
  .panel:first-child{border-right:none;border-bottom:1px solid var(--border)}
  .panel{min-height:35vh}
  .filter-row{margin-left:0}
}