*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:#1f2937}
:root{--bg:#0b1020;--panel:#0f172a;--panel-2:#111827;--border:#293246;--text:#e5e7eb;--muted:#9ca3af;--accent:#22c55e;--danger:#ef4444;--yellow:#f59e0b}
body{background:linear-gradient(180deg,#0b1020,#0b1224);display:flex;flex-direction:column;min-height:100vh;overflow:hidden}
.header,.toolbar,.footer{color:var(--text)}
.toolbar{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--border);background:rgba(17,24,39,.5);backdrop-filter:blur(6px);position:sticky;top:0;z-index:10}
.toolbar .title{font-weight:700;letter-spacing:.5px}
.toolbar .actions{display:flex;gap:8px;align-items:center}
.toolbar button,.file-btn{background:#1f2937;border:1px solid var(--border);color:var(--text);padding:6px 10px;border-radius:6px;cursor:pointer;transition:.15s}
.toolbar button:hover,.file-btn:hover{background:#243041;border-color:#3b455c}
.toolbar .file-btn{position:relative;overflow:hidden}
.toolbar .file-btn input{position:absolute;inset:0;opacity:0;cursor:pointer}

.split{display:grid;grid-template-columns:1fr 1fr;flex:1;min-height:0;overflow:hidden}
.pane{display:flex;flex-direction:column;border-right:1px solid var(--border);background:var(--panel);min-height:0;overflow:hidden}
.pane.right{border-right:none;background:var(--panel-2)}
.pane-header{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-bottom:1px solid var(--border);color:var(--muted);gap:12px}
.hint{font-size:.85em}

#json-input{flex:1;width:100%;padding:0;border:0;outline:none;resize:none;font-family:ui-monospace,Consolas,Monaco,monospace;font-size:14px;line-height:1.5}
#status-bar{display:flex;align-items:center;gap:8px;padding:6px 10px;border-top:1px solid var(--border);background:#0b1222;color:var(--muted)}
#status-text.ok{color:var(--accent)}
#status-text.err{color:var(--danger)}

#search{width:240px;background:#0b1222;border:1px solid var(--border);color:var(--text);padding:6px 8px;border-radius:6px}

.tree{flex:1;overflow:auto;padding:10px}
.hidden{display:none}

/* 左侧 CodeMirror 编辑器容器 */
.editor-cm{flex:1;min-height:0;display:flex}
.CodeMirror{height:100%;width:100%;background:#0b1222;color:var(--text);font-family:ui-monospace,Consolas,Monaco,monospace;font-size:14px;line-height:1.5}
.CodeMirror-scroll{height:100%}
.cm-s-monokai.CodeMirror{background:#0b1222}
.CodeMirror-gutters{background:#0b1222;border-right:1px solid var(--border)}
.CodeMirror-linenumbers{color:#64748b}

/* 源码高亮 token 颜色 */
.tok-key{color:#93c5fd}
.tok-string{color:#fef08a}
.tok-number{color:#86efac}
.tok-boolean{color:#fca5a5}
.tok-null{color:#a78bfa}
.node{position:relative;padding-left:18px;margin:2px 0}
.node .toggle{position:absolute;left:0;top:3px;width:14px;height:14px;display:inline-flex;align-items:center;justify-content:center;border:1px solid #334155;border-radius:3px;color:#94a3b8;background:#0b1222;cursor:pointer;font-size:11px;user-select:none}
.node .key{color:#93c5fd}
.node .sep{color:#64748b;padding:0 4px}
.node .val{color:#e5e7eb}
.node .type-null{color:#a78bfa}
.node .type-bool{color:#fca5a5}
.node .type-number{color:#86efac}
.node .type-string{color:#fef08a}
.children{margin-left:16px;border-left:1px dashed #334155;padding-left:8px}
.collapsed>.children{display:none}

.empty-tip{color:#6b7280;padding:12px}

/* 图片预览浮层 */
.footer{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-top:1px solid var(--border);background:rgba(17,24,39,.5);color:var(--muted);flex-shrink:0;backdrop-filter:blur(6px)}

.badge{display:inline-block;padding:0 6px;border:1px solid #334155;border-radius:999px;color:#9ca3af;font-size:12px;margin-left:6px}

.empty-tip{color:#6b7280;padding:12px}
.img-preview{position:fixed;z-index:1000;display:none;padding:6px;border:1px solid #334155;border-radius:8px;background:#0b1222;box-shadow:0 8px 24px rgba(0,0,0,.35)}
.img-preview img{max-width:360px;max-height:260px;display:block;border-radius:6px}
.img-preview .err{color:#ef4444;padding:4px 2px}