:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #dbe3ee;
  --accent: #0f766e;
  --accent-hover: #0b5c56;
  --danger: #b91c1c;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  --mono-bg: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Noto Sans", "Helvetica Neue", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 5%, rgba(15, 118, 110, 0.08), transparent 35%),
    radial-gradient(circle at 90% 95%, rgba(14, 116, 144, 0.08), transparent 38%),
    var(--bg);
}

.app {
  width: calc(100vw - 24px);
  margin: 12px auto;
  background: color-mix(in srgb, var(--card) 90%, #eef6f6);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.topbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(246, 251, 251, 0.95));
}

h1 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: 0.2px;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-left: auto;
}

button {
  border: none;
  border-radius: 10px;
  padding: 8px 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: var(--accent-hover);
}

button.ghost {
  background: #e9eef5;
  color: #334155;
}

button.ghost:hover {
  background: #dbe3ee;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  width: 30px;
  height: 30px;
}

.icon-btn img {
  width: 16px;
  height: 16px;
  display: block;
}

.pane-tools {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.workspace {
  display: flex;
  min-height: calc(100vh - 110px);
}

.pane {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--line);
  overflow: hidden;
}

.input-pane {
  flex: 0 1 28vw;
  min-width: 240px;
}

.pane:last-child {
  border-right: none;
}

.pane.pane-collapsed {
  flex: 0 0 58px;
  min-width: 58px;
}

.pane.pane-collapsed > :not(.pane-title-row) {
  display: none;
}

.pane.pane-collapsed .pane-title-row {
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  gap: 8px;
  padding: 10px 4px;
}

.pane.pane-collapsed .pane-title {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: 1px;
  max-height: calc(100vh - 180px);
}

.pane.pane-collapsed .pane-toggle {
  margin-top: auto;
}

.quick-pane.pane-collapsed #copySummaryBtn {
  display: none;
}

.pane-title,
.pane-title-row {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: #f8fbff;
  color: #334155;
  font-size: 0.92rem;
  font-weight: 600;
}

.pane-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
}

.pane-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}

.status.error {
  color: var(--danger);
}

textarea,
.output {
  flex: 1;
  margin: 0;
  padding: 14px;
  border: none;
  background: transparent;
  font: 13px/1.6 "Consolas", "Cascadia Mono", "SFMono-Regular", monospace;
  white-space: pre-wrap;
  overflow: auto;
}

textarea {
  resize: none;
  outline: none;
  color: #0f172a;
}

.output {
  white-space: pre-wrap;
  word-break: break-word;
}

.tree-output {
  overflow: auto;
  padding: 10px 12px;
  background: var(--mono-bg);
  font: 13px/1.55 "Consolas", "Cascadia Mono", "SFMono-Regular", monospace;
  flex: 1;
}

.tree-empty {
  color: var(--muted);
  padding: 8px 0;
}

.tree-branch {
  margin: 2px 0;
}

.tree-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  cursor: pointer;
  padding: 3px 0;
}

.tree-summary::-webkit-details-marker {
  display: none;
}

.tree-key {
  color: #0f766e;
}

.tree-meta {
  color: #64748b;
}

.tree-value {
  color: #1d4ed8;
}

.tree-value.string {
  color: #b45309;
}

.tree-value.bool,
.tree-value.null {
  color: #7c3aed;
  font-weight: 700;
}

.tree-children {
  margin-left: 18px;
  border-left: 1px dashed #d3dde8;
  padding-left: 10px;
}

.tree-leaf {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 0;
}

.path-btn {
  margin-left: auto;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 2px 7px;
  background: #f1f5f9;
  color: #334155;
  font-size: 0.72rem;
}

.path-btn:hover {
  background: #e2e8f0;
}

.extract-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  background: #f7fafc;
  flex-wrap: wrap;
}

.extract-bar label {
  font-size: 0.82rem;
  color: #334155;
  font-weight: 600;
}

.extract-bar input {
  min-width: 140px;
  flex: 1;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 7px 10px;
  font: 12.5px/1.4 "Consolas", "Cascadia Mono", "SFMono-Regular", monospace;
  color: #0f172a;
  background: #ffffff;
}

.extract-count {
  margin-left: auto;
  font-size: 0.78rem;
  color: #64748b;
}

.extract-output {
  margin: 0;
  border-top: 1px solid var(--line);
  background: #fbfdff;
  min-height: 0;
  overflow: auto;
  padding: 10px 12px;
  font: 12.5px/1.55 "Consolas", "Cascadia Mono", "SFMono-Regular", monospace;
  color: #0f172a;
  flex: 1;
}

.extract-summary {
  background: #f7fbff;
}

.token-key {
  color: #0f766e;
}

.token-string {
  color: #b45309;
}

.token-number {
  color: #1d4ed8;
}

.token-boolean,
.token-null {
  color: #7c3aed;
  font-weight: 700;
}

.token-punc {
  color: #64748b;
}

@media (max-width: 900px) {
  .workspace {
    flex-direction: column;
    min-height: auto;
  }

  .pane {
    border-right: none;
    border-bottom: 1px solid var(--line);
    min-height: 26vh;
    min-width: 0;
  }

  .pane:last-child {
    border-bottom: none;
  }

  .pane.pane-collapsed {
    flex: 0 0 auto;
    min-height: 44px;
    min-width: 0;
  }

  .pane.pane-collapsed .pane-title {
    writing-mode: horizontal-tb;
    transform: none;
    max-height: none;
  }

  .pane.pane-collapsed .pane-title-row {
    justify-content: space-between;
    padding: 10px 12px;
  }

  .extract-count {
    margin-left: 0;
  }
}