/* ============================================================
   Parity — Structured-data comparator
   Design tokens + IDE-style editor layout
   ============================================================ */

/* ---- Theme tokens (dark default) ---- */
:root {
  --bg-primary: #1e1e2e;
  --bg-secondary: #313244;
  --bg-tertiary: #181825;
  --text-primary: #cdd6f4;
  --text-secondary: #a6adc8;
  --text-muted: #6c7086;
  --accent: #89b4fa;
  --accent-hover: #74c7ec;
  --red: #f38ba8;
  --green: #a6e3a1;
  --yellow: #f9e2af;
  --purple: #cba6f7;
  --teal: #94e2d5;
  --peach: #fab387;
  --border: #45475a;

  --radius: 8px;
  --mono: "JetBrains Mono", "Fira Code", "Courier New", monospace;
}

[data-theme="light"] {
  --bg-primary: #eff1f5;
  --bg-secondary: #e6e9ef;
  --bg-tertiary: #dce0e8;
  --text-primary: #4c4f69;
  --text-secondary: #5c5f77;
  --text-muted: #8c8fa1;
  --accent: #1e66f5;
  --accent-hover: #2a6ef5;
  --red: #d20f39;
  --green: #40a02b;
  --yellow: #df8e1d;
  --purple: #8839ef;
  --teal: #179299;
  --peach: #fe640b;
  --border: #bcc0cc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
}

.container { max-width: 1400px; margin: 0 auto; }

/* ---- Header ---- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.header h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.5px;
}
.header h1 .sub {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 10px;
}
.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 18px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.theme-toggle:hover { background: var(--bg-tertiary); }

/* ---- Inputs grid ---- */
.inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 16px;
}
.input-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}
.panel-header label {
  font-weight: 600;
  font-size: 14px;
}
.file-input { font-size: 12px; color: var(--text-secondary); max-width: 55%; }
.file-error {
  color: var(--red);
  font-size: 12px;
  padding: 0 12px;
  min-height: 0;
}
.file-error:not(:empty) { padding: 8px 12px; }

/* ---- Editor wrapper ---- */
.editor-wrapper {
  position: relative;
  height: 420px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.editor-toolbar {
  display: flex;
  gap: 6px;
  padding: 6px 8px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}
.btn-tool {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 5px;
  cursor: pointer;
}
.btn-tool:hover { color: var(--text-primary); border-color: var(--accent); }
.btn-tool.active { color: var(--accent); border-color: var(--accent); }

.editor-scroll {
  flex: 1;
  overflow: auto;
  background: var(--bg-primary);
}

/* ---- Rendered table view ---- */
.editor-table {
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  width: 100%;
}
.editor-table td { padding: 0; vertical-align: top; white-space: pre; }
.col-fold {
  width: 20px;
  text-align: center;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}
.col-fold:hover { color: var(--accent); }
.col-lineno {
  width: 40px;
  text-align: right;
  padding-right: 8px !important;
  color: var(--text-muted);
  user-select: none;
}
.col-code { padding-left: 12px !important; }
.fold-hint {
  color: var(--text-muted);
  font-style: italic;
  opacity: 0.7;
}
.folded-row .col-code { color: var(--text-muted); }

/* ---- Line highlight classes (diff) ---- */
.line-highlight-red   { background: color-mix(in srgb, var(--red) 18%, transparent); }
.line-highlight-green { background: color-mix(in srgb, var(--green) 18%, transparent); }
.line-highlight-yellow{ background: color-mix(in srgb, var(--yellow) 18%, transparent); }
.line-active { outline: 1px solid var(--accent); }

/* ---- Token classes ---- */
.tk-key    { color: var(--accent); }
.tk-str    { color: var(--green); }
.tk-num    { color: var(--peach); }
.tk-bool   { color: var(--purple); }
.tk-null   { color: var(--red); }
.tk-brace  { color: var(--yellow); }
.tk-bracket{ color: var(--teal); }

/* ---- Edit overlay ---- */
.edit-overlay {
  position: absolute;
  inset: 40px 0 0 0; /* below toolbar */
  display: none;
  flex-direction: row;
  background: var(--bg-primary);
}
.edit-overlay.active { display: flex; }
.line-numbers {
  width: 48px;
  padding: 8px 8px 8px 0;
  text-align: right;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  overflow: hidden;
  white-space: pre;
  user-select: none;
}
.code-area { position: relative; flex: 1; overflow: hidden; }
.highlight-layer,
.edit-textarea {
  margin: 0;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  white-space: pre;
  border: 0;
  overflow: auto;
  tab-size: 2;
}
.highlight-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  color: var(--text-primary);
  background: transparent;
}
.edit-textarea {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  resize: none;
  background: transparent;
  color: transparent;
  caret-color: var(--text-primary);
  outline: none;
}
.raw-textarea { display: none; }

.editor-status {
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
}
.editor-status .err { color: var(--red); }

/* ---- Controls ---- */
.controls,
.options-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.mode-group { display: flex; gap: 12px; margin-right: auto; }
.mode-group label { font-size: 13px; cursor: pointer; display: flex; gap: 4px; align-items: center; }

button {
  font-family: inherit;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: #11111b;
  position: relative;
}
.btn-compare { background: var(--accent); }
.btn-clear   { background: var(--red); }
.btn-format  { background: var(--green); }
.btn-history { background: var(--peach); }
.btn-preset  { background: var(--teal); }
.btn-export  { background: var(--purple); }
.btn-merge   { background: var(--teal); }
.btn-nav     { background: var(--accent); }
button:hover { filter: brightness(1.08); }
button[disabled] { opacity: 0.5; cursor: not-allowed; }

/* Keyboard hint pseudo-elements */
.btn-compare::after,
.btn-format::after,
.btn-clear::after {
  font-size: 10px;
  opacity: 0.65;
  margin-left: 6px;
  font-weight: 400;
}
.btn-compare::after { content: "⌘↵"; }
.btn-format::after  { content: "⌘⇧F"; }
.btn-clear::after   { content: "⌘⇧X"; }

.options-row input[type="text"],
.options-row input[type="number"],
.options-row select {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  font-family: inherit;
}
.options-row label { font-size: 13px; display: flex; align-items: center; gap: 6px; }
.opt-ignore { flex: 1; min-width: 180px; }

/* ---- Diff nav ---- */
.diff-nav-bar {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
}
.diff-nav-bar.active { display: flex; }
.diff-nav-bar .pos { font-size: 13px; color: var(--text-secondary); }
.diff-nav-bar .path-filter { margin-left: auto; min-width: 200px; }

/* ---- Results ---- */
.results {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 80px;
}
.results .placeholder { color: var(--text-muted); text-align: center; padding: 24px; }
.result-summary { margin-bottom: 12px; font-size: 14px; }
.result-summary.match { color: var(--green); }
.result-summary.diff  { color: var(--yellow); }

.group { margin-bottom: 10px; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.group-header {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}
.group-header .count { color: var(--text-muted); font-weight: 400; }
.group-body { display: block; }
.group.collapsed .group-body { display: none; }

.diff-item {
  padding: 8px 12px;
  border-left: 3px solid var(--border);
  font-size: 13px;
  cursor: pointer;
}
.diff-item + .diff-item { border-top: 1px solid var(--border); }
.diff-item.active { background: var(--bg-tertiary); }
.diff-item .path { font-family: var(--mono); color: var(--accent); font-size: 12px; }
.diff-item .msg { color: var(--text-secondary); margin-top: 2px; }
.diff-item .vals { font-family: var(--mono); font-size: 12px; margin-top: 4px; }
.diff-item .vals .exp { color: var(--green); }
.diff-item .vals .act { color: var(--red); }

.cat-missing_key    { border-left-color: var(--red); background: color-mix(in srgb, var(--red) 8%, transparent); }
.cat-extra_key      { border-left-color: var(--green); background: color-mix(in srgb, var(--green) 8%, transparent); }
.cat-type_mismatch  { border-left-color: var(--purple); background: color-mix(in srgb, var(--purple) 8%, transparent); }
.cat-value_mismatch { border-left-color: var(--yellow); background: color-mix(in srgb, var(--yellow) 8%, transparent); }
.cat-schema_violation { border-left-color: var(--peach); background: color-mix(in srgb, var(--peach) 8%, transparent); }
.cat-depth_exceeded { border-left-color: var(--teal); background: color-mix(in srgb, var(--teal) 8%, transparent); }

/* ---- Panels (merge / presets / history) ---- */
.panel {
  display: none;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 12px;
}
.panel.active { display: block; }
.panel h3 { margin: 0 0 12px; font-size: 15px; }
.panel-actions { display: flex; gap: 8px; margin-top: 12px; }
.merge-result {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--bg-tertiary);
  padding: 12px;
  border-radius: 6px;
  max-height: 300px;
  overflow: auto;
  white-space: pre;
}
.resolution-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.resolution-row .path { font-family: var(--mono); color: var(--accent); flex: 1; }

.list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 6px;
  font-size: 13px;
}
.list-item .meta { color: var(--text-muted); font-size: 11px; }
.list-item .actions { display: flex; gap: 6px; }
.list-item button { padding: 4px 8px; font-size: 11px; }

/* ---- Scrollbars ---- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-tertiary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .inputs { grid-template-columns: 1fr; }
  .controls, .options-row { flex-direction: column; align-items: stretch; }
  .mode-group { margin-right: 0; }
}