:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.24);
}
[data-theme="dark"] {
  --bg-primary: #0B0F1A; --bg-secondary: #111827; --bg-card: rgba(17,24,39,0.7);
  --bg-card-hover: rgba(30,41,59,0.8); --bg-input: rgba(30,41,59,0.6);
  --bg-overlay: rgba(0,0,0,0.6); --border-color: rgba(148,163,184,0.12);
  --border-focus: #60A5FA; --text-primary: #F1F5F9; --text-secondary: #94A3B8;
  --text-tertiary: #64748B; --accent-blue: #60A5FA; --accent-green: #34D399;
  --accent-red: #F87171; --accent-amber: #FBBF24; --accent-purple: #A78BFA;
  --gradient-primary: linear-gradient(135deg, #60A5FA, #34D399);
  --gradient-bg: linear-gradient(180deg, #0B0F1A 0%, #111827 100%);
  --glass-bg: rgba(17,24,39,0.6); --glass-border: rgba(148,163,184,0.08);
  --json-key: #60A5FA; --json-string: #34D399; --json-number: #FBBF24;
  --json-boolean: #A78BFA; --json-null: #F87171; --json-bracket: #64748B;
}
[data-theme="light"] {
  --bg-primary: #F8FAFC; --bg-secondary: #FFFFFF; --bg-card: rgba(255,255,255,0.8);
  --bg-card-hover: rgba(241,245,249,0.9); --bg-input: rgba(241,245,249,0.8);
  --bg-overlay: rgba(0,0,0,0.3); --border-color: rgba(148,163,184,0.2);
  --border-focus: #3B82F6; --text-primary: #0F172A; --text-secondary: #475569;
  --text-tertiary: #94A3B8; --accent-blue: #3B82F6; --accent-green: #10B981;
  --accent-red: #EF4444; --accent-amber: #F59E0B; --accent-purple: #8B5CF6;
  --gradient-primary: linear-gradient(135deg, #3B82F6, #10B981);
  --gradient-bg: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
  --glass-bg: rgba(255,255,255,0.6); --glass-border: rgba(148,163,184,0.15);
  --json-key: #3B82F6; --json-string: #10B981; --json-number: #F59E0B;
  --json-boolean: #8B5CF6; --json-null: #EF4444; --json-bracket: #94A3B8;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font-sans);background:var(--gradient-bg);color:var(--text-primary);min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}
.app{display:flex;flex-direction:column;min-height:100vh}
.header{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:var(--glass-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border);position:sticky;top:0;z-index:100}
.header-left{display:flex;align-items:center;gap:12px}
.header-right{display:flex;align-items:center;gap:8px}
.logo{display:flex;align-items:center;gap:10px}
.logo h1{font-size:1.15rem;font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.badge{font-size:.72rem;font-weight:600;padding:3px 10px;border-radius:20px;background:var(--bg-input);color:var(--text-secondary);border:1px solid var(--border-color)}
.btn{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-sans);font-size:.82rem;font-weight:500;padding:8px 14px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}
.btn-primary{background:var(--gradient-primary);color:#fff;border:none;box-shadow:0 2px 8px rgba(96,165,250,.25)}
.btn-primary:hover:not(:disabled){box-shadow:0 4px 16px rgba(96,165,250,.4);transform:translateY(-1px)}
.btn-secondary{background:var(--bg-input);color:var(--text-primary);border:1px solid var(--border-color)}
.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--accent-blue)}
.btn-ghost{background:transparent;color:var(--text-secondary)}
.btn-ghost:hover:not(:disabled){color:var(--text-primary);background:var(--bg-input)}
.btn-icon{background:transparent;color:var(--text-secondary);padding:6px;border:none;border-radius:var(--radius-xs)}
.btn-icon:hover:not(:disabled){color:var(--text-primary);background:var(--bg-input)}
.btn-danger{background:transparent;color:var(--accent-red);border:1px solid rgba(248,113,113,.2)}
.btn-danger:hover:not(:disabled){background:rgba(248,113,113,.1)}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 24px;border-bottom:1px solid var(--border-color);flex-wrap:wrap}
.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:8px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:6px 12px;min-width:280px;transition:border-color var(--transition)}
.search-box:focus-within{border-color:var(--accent-blue);box-shadow:0 0 0 3px rgba(96,165,250,.12)}
.search-box svg{flex-shrink:0;color:var(--text-tertiary)}
.search-box input{flex:1;background:transparent;border:none;outline:none;font-family:var(--font-sans);font-size:.85rem;color:var(--text-primary)}
.search-box input::placeholder{color:var(--text-tertiary)}
.search-box kbd{font-family:var(--font-sans);font-size:.65rem;font-weight:600;padding:2px 6px;border-radius:4px;background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-tertiary);flex-shrink:0}
.tabs-container{padding:0 24px;border-bottom:1px solid var(--border-color);overflow-x:auto}
.tabs{display:flex;gap:2px}
.tab-btn{font-family:var(--font-sans);font-size:.8rem;font-weight:500;padding:10px 16px;background:transparent;border:none;color:var(--text-tertiary);cursor:pointer;border-bottom:2px solid transparent;transition:all var(--transition);white-space:nowrap}
.tab-btn:hover{color:var(--text-primary)}
.tab-btn.active{color:var(--accent-blue);border-bottom-color:var(--accent-blue)}
.tab-btn .tab-count{font-size:.68rem;margin-left:6px;padding:1px 6px;border-radius:10px;background:var(--bg-input)}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:80px 24px;gap:16px}
.empty-icon{color:var(--text-tertiary);opacity:.4;margin-bottom:8px}
.empty-state h2{font-size:1.25rem;font-weight:600}
.empty-state p{color:var(--text-secondary);font-size:.9rem;max-width:400px}
.empty-state code{font-family:var(--font-mono);font-size:.85rem;padding:2px 6px;background:var(--bg-input);border-radius:4px}
.drop-hint{display:flex;align-items:center;gap:8px;margin-top:16px;padding:16px 32px;border:2px dashed var(--border-color);border-radius:var(--radius);color:var(--text-tertiary);font-size:.85rem;font-weight:500}
.main{flex:1;padding:0 24px 24px;overflow-y:auto}
.data-view{padding-top:16px}
.entry-card{background:var(--bg-card);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius);margin-bottom:10px;transition:all var(--transition);overflow:hidden;animation:cardIn .3s ease forwards}
.entry-card:hover{border-color:rgba(96,165,250,.2);box-shadow:var(--shadow-sm)}
@keyframes cardIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.entry-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;cursor:pointer;gap:12px}
.entry-header:hover{background:var(--bg-card-hover)}
.entry-id{font-family:var(--font-mono);font-size:.78rem;font-weight:500;color:var(--accent-blue);background:rgba(96,165,250,.1);padding:2px 8px;border-radius:4px;flex-shrink:0}
.entry-preview{flex:1;font-size:.82rem;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--font-mono)}
.entry-actions{display:flex;gap:4px;flex-shrink:0;opacity:0;transition:opacity var(--transition)}
.entry-card:hover .entry-actions{opacity:1}
.entry-body{border-top:1px solid var(--border-color);padding:16px;display:none}
.entry-body.open{display:block}
.json-highlight{font-family:var(--font-mono);font-size:.8rem;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.json-highlight .jk{color:var(--json-key)}.json-highlight .js{color:var(--json-string)}
.json-highlight .jn{color:var(--json-number)}.json-highlight .jb{color:var(--json-boolean)}
.json-highlight .jnull{color:var(--json-null);font-style:italic}.json-highlight .jbr{color:var(--json-bracket)}
.modal-overlay{position:fixed;inset:0;background:var(--bg-overlay);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;animation:fadeIn .2s ease}
.modal{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius);width:90%;max-width:640px;max-height:80vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);animation:scaleIn .25s ease}
@keyframes fadeIn{from{opacity:0}}
@keyframes scaleIn{from{opacity:0;transform:scale(.95)}}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-color)}
.modal-header h2{font-size:1rem;font-weight:600}
.modal-body{padding:20px;flex:1;overflow-y:auto}
.modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:12px 20px;border-top:1px solid var(--border-color)}
.editor-label{display:block;font-size:.78rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}
.json-textarea{width:100%;min-height:260px;font-family:var(--font-mono);font-size:.82rem;line-height:1.6;padding:14px;background:var(--bg-input);color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);resize:vertical;outline:none;transition:border-color var(--transition)}
.json-textarea:focus{border-color:var(--accent-blue);box-shadow:0 0 0 3px rgba(96,165,250,.12)}
.editor-hint{font-size:.75rem;margin-top:6px;min-height:18px}
.editor-hint.error{color:var(--accent-red)}.editor-hint.success{color:var(--accent-green)}
.version-panel{position:fixed;right:0;top:0;bottom:0;width:340px;background:var(--bg-secondary);border-left:1px solid var(--border-color);z-index:150;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);animation:slideInRight .25s ease}
@keyframes slideInRight{from{transform:translateX(100%)}}
.version-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-color)}
.version-header h3{font-size:.95rem;font-weight:600}
.version-list{flex:1;overflow-y:auto;padding:12px}
.version-item{padding:10px 14px;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);margin-bottom:4px}
.version-item:hover{background:var(--bg-input)}
.version-item.active{background:rgba(96,165,250,.1);border:1px solid rgba(96,165,250,.2)}
.version-time{font-size:.75rem;color:var(--text-tertiary);font-family:var(--font-mono)}
.version-desc{font-size:.82rem;color:var(--text-primary);margin-top:4px}
.version-badge{display:inline-block;font-size:.65rem;font-weight:600;padding:1px 6px;border-radius:4px;margin-top:4px}
.version-badge.add{background:rgba(52,211,153,.15);color:var(--accent-green)}
.version-badge.edit{background:rgba(96,165,250,.15);color:var(--accent-blue)}
.version-badge.delete{background:rgba(248,113,113,.15);color:var(--accent-red)}
.toast-container{position:fixed;bottom:20px;right:20px;z-index:300;display:flex;flex-direction:column;gap:8px}
.toast{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);font-size:.82rem;animation:toastIn .3s ease;max-width:360px}
.toast.success{border-left:3px solid var(--accent-green)}
.toast.error{border-left:3px solid var(--accent-red)}
.toast.info{border-left:3px solid var(--accent-blue)}
@keyframes toastIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
.drag-overlay{position:fixed;inset:0;background:rgba(96,165,250,.08);backdrop-filter:blur(4px);z-index:250;display:flex;align-items:center;justify-content:center}
.drag-content{display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--accent-blue);font-size:1.1rem;font-weight:600}
[data-theme="dark"] .icon-moon{display:none}[data-theme="dark"] .icon-sun{display:block}
[data-theme="light"] .icon-moon{display:block}[data-theme="light"] .icon-sun{display:none}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}
.highlight-match{background:rgba(251,191,36,.25);border-radius:2px;padding:0 1px}
@media(max-width:768px){
  .header{padding:12px 16px}.toolbar{padding:10px 16px;flex-direction:column;align-items:stretch}
  .toolbar-left{flex-wrap:wrap}.search-box{min-width:unset;width:100%}.search-box kbd{display:none}
  .main{padding:0 16px 16px}.entry-actions{opacity:1}.version-panel{width:100%}.logo h1{font-size:1rem}
}
@media(max-width:480px){
  .header{padding:10px 12px}.toolbar{padding:8px 12px}.main{padding:0 12px 12px}
  .btn{font-size:.78rem;padding:6px 10px}
}