:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --panel: #f6f8fa;
  --panel-2: #eef1f4;
  --border: #d0d7de;
  --text: #1f2328;
  --muted: #59636e;
  --accent: #0969da;
  --accent-bg: #ddf4ff;
  --sel: #d8e9fb;
  --danger: #b42318;
  --danger-bg: #ffebe9;
  --add-bg: #dafbe1;
  --add-fg: #116329;
  --del-bg: #ffebe9;
  --del-fg: #a40e26;
  --mod-bg: #fff8c5;
  --mod-fg: #7d4e00;
  --typ-bg: #fbefff;
  --typ-fg: #8250df;
  --tk-key: #0550ae;
  --tk-str: #116329;
  --tk-num: #953800;
  --tk-bool: #8250df;
  --tk-null: #6e7781;
  --mark: #ffe066;
  --mark-cur: #ff9f1a;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --panel: #151b23;
    --panel-2: #1c232d;
    --border: #30363d;
    --text: #e6edf3;
    --muted: #9198a1;
    --accent: #4493f8;
    --accent-bg: #10243d;
    --sel: #1f3350;
    --danger: #ff8a80;
    --danger-bg: #3a1618;
    --add-bg: #12301c;
    --add-fg: #7ee787;
    --del-bg: #3d181b;
    --del-fg: #ffa198;
    --mod-bg: #392c0b;
    --mod-fg: #e3b341;
    --typ-bg: #2a1a3f;
    --typ-fg: #d2a8ff;
    --tk-key: #79c0ff;
    --tk-str: #7ee787;
    --tk-num: #ffa657;
    --tk-bool: #d2a8ff;
    --tk-null: #9198a1;
    --mark: #6b5a00;
    --mark-cur: #b35c00;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 var(--sans);
  -webkit-text-size-adjust: 100%;
}
h1, h2, p { margin: 0; }
code, .mono { font-family: var(--mono); font-size: 12.5px; }
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

button, select, input[type=text], input[type=search], textarea {
  font: inherit;
  color: inherit;
}
button, select {
  min-height: 30px;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  cursor: pointer;
}
button:hover:not(:disabled), select:hover { background: var(--panel-2); }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { button.primary { color: #06101c; } }
button.primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
button[aria-pressed=true] { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
input[type=text], input[type=search] {
  min-height: 30px;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  min-width: 0;
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
input[aria-invalid=true], textarea[aria-invalid=true] { border-color: var(--danger); }

/* ---------- 版面 ---------- */
.app { display: flex; flex-direction: column; height: 100dvh; }
.topbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.brand { font: 700 16px/1.2 var(--mono); letter-spacing: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 6px; }
.privacy { color: var(--muted); font-size: 12.5px; margin-left: auto; }
.workspace {
  flex: 1; min-height: 0;
  display: grid;
  grid-template-columns: minmax(280px, 34%) minmax(0, 1fr);
}
.pane { min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.pane-input { border-right: 1px solid var(--border); }
.pane-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 10px; padding: 8px 12px 6px; }
.pane-head h2 { font-size: 13px; font-weight: 600; }
.pane-head .muted { font-size: 12.5px; }
#input {
  flex: 1; min-height: 120px;
  margin: 0 12px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  font: 12.5px/1.55 var(--mono);
  resize: none;
  white-space: pre;
  overflow: auto;
  tab-size: 2;
}
.status { padding: 8px 12px; color: var(--muted); font-size: 12.5px; }
.progress { display: flex; align-items: center; gap: 8px; padding: 8px 12px 0; font-size: 12.5px; }
.progress progress { flex: 1; height: 8px; accent-color: var(--accent); }
.error-box {
  margin: 8px 12px 0;
  padding: 8px 10px;
  border: 1px solid var(--danger);
  border-left-width: 4px;
  border-radius: 6px;
  background: var(--danger-bg);
}
.error-box #error-msg { font-weight: 600; color: var(--danger); }
.row-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.row-actions.end { justify-content: flex-end; }

.tabs { display: flex; gap: 2px; padding: 6px 12px 0; border-bottom: 1px solid var(--border); overflow-x: auto; scrollbar-width: none; }
.tabs [role=tab] {
  flex: none; border: 1px solid transparent; border-bottom: 0; border-radius: 6px 6px 0 0;
  background: transparent; padding: 5px 12px; margin-bottom: -1px; color: var(--muted);
}
.tabs [role=tab][aria-selected=true] { background: var(--bg); border-color: var(--border); color: var(--text); font-weight: 600; }
.panel { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.panel[hidden] { display: none; }
.grow { flex: 1; min-height: 0; }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; padding: 8px 12px; border-bottom: 1px solid var(--border); }
.toolbar.column { flex-direction: column; align-items: stretch; }
.toolbar-line { display: flex; align-items: center; gap: 8px; }
.spacer { flex: 1; }
.chk { display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
.field { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.field.wide { display: flex; }
.field.wide input { flex: 1; }
#search-input { width: 200px; max-width: 100%; }
.field-error { color: var(--danger); font-size: 12.5px; min-height: 0; overflow-wrap: anywhere; }
.field-error:empty { display: none; }
.note { padding: 6px 12px; background: var(--accent-bg); border-bottom: 1px solid var(--border); }
.empty { padding: 12px; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.chip { min-height: 26px; padding: 1px 8px; font: 12px var(--mono); border-radius: 13px; }
.conv-info { padding: 6px 12px; font-size: 12.5px; }
.summary { display: flex; flex-wrap: wrap; gap: 4px 12px; font-weight: 600; }
.summary span { white-space: nowrap; }
.d-add { color: var(--add-fg); } .d-del { color: var(--del-fg); } .d-mod { color: var(--mod-fg); } .d-typ { color: var(--typ-fg); }
.seg { display: inline-flex; }
.seg button:first-child { border-radius: 6px 0 0 6px; }
.seg button:last-child { border-radius: 0 6px 6px 0; margin-left: -1px; }

/* ---------- 虛擬清單 ---------- */
.vlist { position: relative; overflow-y: auto; overflow-x: hidden; background: var(--bg); }
.vlist.hscroll { overflow-x: auto; }
.vl-spacer { position: relative; width: 100%; }
.vl-rows { position: absolute; left: 0; top: 0; right: 0; will-change: transform; }
.hscroll .vl-rows { right: auto; min-width: 100%; width: max-content; }
.vrow { display: flex; align-items: center; min-width: 100%; white-space: nowrap; font-family: var(--mono); font-size: 12.5px; }
.vrow.sel { background: var(--sel); box-shadow: inset 3px 0 0 var(--accent); }
.vrow.err { background: var(--danger-bg); box-shadow: inset 3px 0 0 var(--danger); }
.vlist:focus-visible { outline-offset: -2px; }

.tree-list .vrow { cursor: default; }
.tv-ind { flex: none; }
.tv-tog { flex: none; width: 18px; text-align: center; color: var(--muted); cursor: pointer; user-select: none; }
.tv-main { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.tv-key { color: var(--tk-key); }
.tv-root { color: var(--muted); font-style: italic; }
.tv-idx { color: var(--muted); }
.tv-colon, .tv-br { color: var(--muted); }
.tv-meta { color: var(--muted); font-size: 12px; }
.tv-type { flex: none; padding: 0 10px 0 8px; color: var(--muted); font-size: 11.5px; }
mark { background: var(--mark); color: inherit; border-radius: 2px; }
mark.cur { background: var(--mark-cur); }
.pathbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; padding: 6px 12px; border-top: 1px solid var(--border); background: var(--panel); }
.pathbar code { overflow-wrap: anywhere; min-width: 0; }

.tk-key { color: var(--tk-key); } .tk-str { color: var(--tk-str); } .tk-num { color: var(--tk-num); }
.tk-bool { color: var(--tk-bool); } .tk-null { color: var(--tk-null); } .tk-punc { color: var(--muted); }
.ln { flex: none; width: 4.2em; padding-right: 10px; text-align: right; color: var(--muted); user-select: none; }
.code { white-space: pre; }
.q-path { font-family: var(--mono); font-size: 12.5px; color: var(--accent); overflow-wrap: anywhere; }
.query-list .vrow { display: block; padding: 3px 12px; cursor: pointer; border-bottom: 1px solid var(--panel-2); overflow: hidden; }
.query-list .vrow:hover { background: var(--panel); }
.query-list .q-val { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.query-list .q-path { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- 比對 ---------- */
.cmp-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 8px 12px 0; }
.cmp-side { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.cmp-side label { font-weight: 600; font-size: 13px; }
.cmp-side textarea {
  height: 130px; padding: 6px 8px; resize: vertical;
  border: 1px solid var(--border); border-radius: 6px; background: var(--bg);
  font: 12.5px/1.5 var(--mono); white-space: pre; overflow: auto;
}
.cmp-list .vrow { display: block; padding: 4px 12px; border-bottom: 1px solid var(--panel-2); overflow: hidden; }
.c-head { display: flex; gap: 8px; align-items: center; min-width: 0; }
.c-head .q-path { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.c-badge { flex: none; padding: 0 6px; border-radius: 4px; font: 600 11.5px/1.7 var(--sans); }
.c-added { background: var(--add-bg); color: var(--add-fg); }
.c-removed { background: var(--del-bg); color: var(--del-fg); }
.c-modified { background: var(--mod-bg); color: var(--mod-fg); }
.c-type-changed { background: var(--typ-bg); color: var(--typ-fg); }
.c-vals { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-family: var(--mono); font-size: 12px; }
.d-add-t { color: var(--add-fg); } .d-del-t { color: var(--del-fg); }
.vrow.sbs, .rep-list .vrow { display: grid; grid-template-columns: 16px 3.6em minmax(300px, 1fr) 16px 3.6em minmax(300px, 1fr); min-width: 760px; }
.sbs .mk { text-align: center; color: var(--muted); font-weight: 700; }
.sbs .ln { width: auto; padding-right: 8px; }
.sbs .cell { white-space: pre; overflow: hidden; padding: 0 6px; height: 100%; display: flex; align-items: center; }
.sbs .cell.r { border-left: 1px solid var(--border); }
.s-del .cell.l, .s-chg .cell.l { background: var(--del-bg); }
.s-add .cell.r, .s-chg .cell.r { background: var(--add-bg); }
.s-chg .cell.l { background: var(--mod-bg); }
.s-chg .cell.r { background: var(--mod-bg); }

/* ---------- 對話框 ---------- */
dialog {
  width: min(960px, calc(100vw - 24px)); max-height: calc(100dvh - 24px);
  padding: 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text);
}
dialog[open] { display: flex; flex-direction: column; gap: 8px; }
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog h2 { font-size: 15px; }
.rep-fixes { margin: 0; padding-left: 18px; max-height: 110px; overflow: auto; font-size: 13px; }
.rep-list { height: 300px; min-height: 120px; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; display: flex; }
.rep-list .vlist { flex: 1; }

.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  padding: 6px 14px; border-radius: 6px; background: var(--text); color: var(--bg);
  opacity: 0; pointer-events: none; transition: opacity .15s; z-index: 50;
}
.toast.show { opacity: 1; }
.drop-hint {
  position: fixed; inset: 8px; z-index: 40;
  display: flex; align-items: center; justify-content: center;
  border: 2px dashed var(--accent); border-radius: 8px; background: var(--accent-bg);
  color: var(--accent); font-weight: 600; pointer-events: none;
}

/* ---------- 手機 ---------- */
@media (max-width: 820px) {
  .app { height: auto; min-height: 100dvh; }
  .workspace { display: flex; flex-direction: column; }
  .pane-input { border-right: 0; border-bottom: 1px solid var(--border); height: 340px; }
  #input { min-height: 90px; }
  .pane-view { height: 88dvh; min-height: 520px; }
  .privacy { margin-left: 0; flex-basis: 100%; }
  button, select { min-height: 36px; }
  .cmp-inputs { grid-template-columns: 1fr; }
  .cmp-side textarea { height: 90px; }
  #search-input { flex: 1; width: auto; min-width: 120px; }
  .tv-type { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }